CN103969910B - A kind of electrophoretic display apparatus and its manufacture method, display methods - Google Patents
A kind of electrophoretic display apparatus and its manufacture method, display methods Download PDFInfo
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- 239000002245 particle Substances 0.000 claims abstract description 137
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- 239000010409 thin film Substances 0.000 claims description 146
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Abstract
The embodiment of the present invention provides a kind of electrophoretic display apparatus and its manufacture method, display methods.It is related to display technology field, by controlling the rotating particle with different colours to be rotated to realize that the colorization of electrophoretic display apparatus is shown.Including the first substrate and second substrate being oppositely arranged.First substrate includes the grid line and data wire that transverse and longitudinal is intersected, and above-mentioned grid line and data wire, which intersect, defines at least one sub-pix.N-th sub-pix includes arc pixel electrode and the first film transistor being connected with arc pixel electrode.Rotating particle is provided with the groove on the surface of arc pixel electrode.At least two colored regions are provided with rotating particle, the electric charge that at least one pair of colored region carries is different, to cause rotating particle to be rotated under the control of first film transistor, by predeterminable area towards the display side of electrophoretic display apparatus.
Description
Technical Field
The invention relates to the technical field of display, in particular to an electrophoretic display device, a manufacturing method thereof and a display method thereof.
Background
With the rapid development of display technology, flat panel display devices have been widely used in the display field. Conventional flat display devices include liquid crystal display devices, electrophoretic display devices, organic electroluminescent display devices, and the like. However, the electrophoretic display device has become an increasingly important flat display device due to its advantages of low power consumption, high reflectivity, and high contrast ratio.
Current electrophoretic display devices have an electrophoretic layer between upper and lower electrode layers, the electrophoretic layer comprising a plurality of charged particles, the colors of which typically include white and black. When a voltage is applied to the electrode layer, the charged particles are driven to move, so that each pixel of the electrophoretic display device can display black or white. Since the electrophoretic display device cannot display colors, it is difficult to meet the requirement of colorizing the current flat panel display device.
Therefore, a color filter may be provided on the electrophoretic display device to realize colorization. Specifically, in the manufacturing process, the color filter needs to be aligned with each pixel on the back plate of the electrophoretic display device, and then a pressing process is performed to complete the manufacturing of the pixilated color filter. Each of which displays a particular primary color, for example red, green or blue. However, the requirement for alignment accuracy is high in the process of manufacturing the pixelized color filter. Therefore, the difficulty and complexity of the manufacturing process are increased, and the colorized display of the electrophoretic display device is not easy to realize.
Disclosure of Invention
Embodiments of the present invention provide an electrophoretic display device, a method of manufacturing the same, and a display method, in which colored display of the electrophoretic display device is achieved by controlling rotation of rotating particles having different color regions.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in one aspect of the embodiments of the present invention, an electrophoretic display device is provided, which includes a first substrate and a second substrate that are disposed opposite to each other, where the first substrate includes a gate line and a data line that cross each other in a horizontal direction and a vertical direction, and the gate line and the data line cross each other to define at least one sub-pixel;
the Nth sub-pixel comprises an arc-shaped pixel electrode and a first thin film transistor connected with the arc-shaped pixel electrode; the first thin film transistor is arranged at the intersection of the Nth grid line and the Nth data line;
the surface of the arc pixel electrode is provided with a groove; rotating particles are arranged in the groove;
the rotating particles are provided with at least two color areas, wherein at least one pair of color areas have different charges, so that the rotating particles rotate under the control of the first thin film transistor, and a preset area faces the display side of the electrophoretic display device.
In another aspect of the embodiments of the present invention, there is provided a method for manufacturing an electrophoretic display device, including a method for manufacturing a first substrate and a second substrate which are oppositely disposed, and further including:
forming a grid line and a data line which are crossed transversely and longitudinally on the surface of a transparent substrate of the first substrate, wherein the grid line and the data line are crossed to define at least one sub-pixel;
arranging a first thin film transistor at the intersection of the Nth grid line and the Nth data line;
forming an arc-shaped pixel electrode with a groove on the surface in the Nth sub-pixel; the arc pixel electrode is connected with the first thin film transistor;
placing rotating particles in the groove; the rotating particles are provided with at least two color areas, and charges of at least one pair of the color areas are different, so that the rotating particles rotate under the control of the first thin film transistor, and a preset area faces the display side of the electrophoretic display device.
In another aspect of the embodiments of the present invention, there is provided a display method of an electrophoretic display device, including a method of controlling any one of the electrophoretic display devices described above to perform display.
The embodiment of the invention provides an electrophoretic display device, a manufacturing method thereof and a display method. The electrophoretic display device includes a first substrate and a second substrate disposed opposite to each other. The first substrate comprises a grid line and a data line which are crossed transversely and longitudinally, and at least one sub-pixel is defined by the crossing of the grid line and the data line. The Nth sub-pixel comprises an arc-shaped pixel electrode and a first thin film transistor connected with the arc-shaped pixel electrode. Rotating particles are arranged in the grooves on the surface of the arc-shaped pixel electrode. The rotating particles are provided with at least two color areas, and charges of at least one pair of color areas are different, so that the rotating particles rotate under the control of the first thin film transistor, and the preset area faces the display side of the electrophoretic display device. In this way, since the manufacturing process of the first substrate is simple, and the control process of the pixel circuit on the substrate is easy to operate, has a fast response speed and high precision, the rotation direction of the rotating particles is controlled by the thin film transistor, so that the electrophoretic display device can be easily colorized, and the quality and effect of color display are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an electrophoretic display device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another electrophoretic display device according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a spinning particle according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first substrate according to an embodiment of the invention;
fig. 5 is a schematic structural diagram of another first substrate according to an embodiment of the disclosure;
fig. 6 is a schematic structural diagram of another electrophoretic display device according to an embodiment of the invention;
FIG. 7 is a flowchart illustrating a method for fabricating an electrophoretic display device according to an embodiment of the present invention;
FIG. 8 is a flowchart illustrating a method of fabricating an electrophoretic display device according to another embodiment of the present invention;
fig. 9 is a flowchart illustrating a display method of an electrophoretic display device according to an embodiment of the invention;
fig. 10 is a flowchart of a display method of another electrophoretic display device according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the invention provides an electrophoretic display device, as shown in fig. 1, including a first substrate 10 and a second substrate 20 disposed opposite to each other. The first substrate 10, as shown in fig. 2, includes a gate line 101 and a data line 102 crossing in a horizontal direction and a vertical direction, and the gate line 101 and the data line 102 cross to define at least one sub-pixel.
The nth sub-pixel includes an arc-shaped pixel electrode 103 and a first thin film transistor 104 connected to the arc-shaped pixel electrode 103. The first thin film transistor 104 is disposed at the intersection of the nth gate line 101 and the nth data line 102.
The surface of the arc-shaped pixel electrode 103 has a groove 1030. Within this recess 1030 is disposed a rotating particle 105.
The rotating particles 105 are provided with at least two color regions 106, wherein at least one pair of color regions 106 has different charges (for example, in the nth sub-pixel, as shown in fig. 2, the rotating particles 105 may have a pair of different positively charged red regions R and negatively charged blue regions B), so that the rotating particles 105 rotate under the control of the first thin film transistor 104 to face the predetermined region to the display side of the electrophoretic display device.
The predetermined region is a color region, and when the subpixel is predetermined to display a certain color, for example, red, the color of the predetermined region is red.
The specific control process of the first tft 104 may be that, when the pre-display color of the nth sub-pixel is red, the nth gate line 101 inputs a turn-on signal to turn on the first tft 104, and then the nth data line 102 inputs a positive bias voltage as the first rotation signal, so that the arc-shaped pixel electrode 103 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the negatively charged blue region B of the rotating particles 105 rotates to the side near the arc-shaped pixel electrode 103, and the positively charged red region R turns to the display side of the electrophoretic display device, so that the nth sub-pixel displays red.
The embodiment of the invention provides an electrophoretic display device. The electrophoretic display device includes a first substrate and a second substrate disposed opposite to each other. The first substrate comprises a grid line and a data line which are crossed transversely and longitudinally, and at least one sub-pixel is defined by the crossing of the grid line and the data line. The Nth sub-pixel comprises an arc-shaped pixel electrode and a first thin film transistor connected with the arc-shaped pixel electrode. Rotating particles are arranged in the grooves on the surface of the arc-shaped pixel electrode. The rotating particles are provided with at least two color areas, and charges of at least one pair of color areas are different, so that the rotating particles rotate under the control of the first thin film transistor, and the preset area faces the display side of the electrophoretic display device. In this way, since the manufacturing process of the first substrate is simple, and the control process of the pixel circuit on the substrate is easy to operate, has a fast response speed and high precision, the rotation direction of the rotating particles is controlled by the thin film transistor, so that the electrophoretic display device can be easily colorized, and the quality and effect of color display are improved.
Preferably, the rotating particles 105 may be cylinders as shown in fig. 3, and since the coloring distribution of the colored regions on the cylinders is relatively uniform, color shift caused by uneven coloring distribution can be avoided during the colorization of the electrophoretic display device using the rotating particles 105, so that the colorization process of the electrophoretic display device is easier to control. Of course, the rotating particles 105 may have a spherical or truncated cone shape. The embodiments of the present invention are not limited in this regard.
In the embodiment of the present invention, the rotating particles 105 are all described by taking a cylinder as an example. However, for clarity, in the top view (fig. 2) of the first substrate 10 in the embodiment of the present invention, the rotating particles 105 are drawn in a side view (the state of the rotating particles 105 in fig. 1).
Further, when three sub-pixels of red, green, and blue constitute one pixel, two color regions 106, which are a red region R and a blue region B, or a red region R and a green region G, are oppositely provided on the rotating particle 105 located in the red sub-pixel. The red region is made to face the display side under the control of the first thin film transistor 104.
For example, as shown in fig. 2, when the nth sub-pixel is the red sub-pixel, the nth gate line 101 inputs a turn-on signal to turn on the first tft 104, and then the nth data line 102 inputs a positive bias voltage as a first rotation signal, so that the arc-shaped pixel electrode 103 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the negatively charged blue region B of the rotating particles 105 rotates to the side near the arc-shaped pixel electrode 103, and the positively charged red region R turns to the display side of the electrophoretic display device, so that the nth sub-pixel displays red.
Two color regions 106, which are a green region G and a red region R, or a green region G and a blue region B, are oppositely disposed on the rotating particles 105 in the green sub-pixel. The green region G is made to face the display side under the control of the first thin film transistor 104.
For example, as shown in fig. 2, when the nth sub-pixel is the green sub-pixel, the nth row gate line 101 inputs a turn-on signal to turn on the first thin film transistor 104, and then the nth column data line 102 inputs a positive bias voltage as a first rotation signal, so that the arc-shaped pixel electrode 103 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the red region R with negative charges of the rotating particles 105 rotates to the side close to the arc-shaped pixel electrode 103, and the green region G with positive charges turns to the display side of the electrophoretic display device, so that the nth sub-pixel displays green.
Two color regions 106, which are a blue region B and a green region G, or a blue region B and a red region R, are oppositely disposed on the rotating particles 105 in the blue sub-pixel. The blue region B is made to face the display side under the control of the first thin film transistor 104.
For example, as shown in fig. 2, when the nth sub-pixel is the blue sub-pixel, the nth row gate line 101 inputs a turn-on signal to turn on the first thin film transistor 104, and then the nth column data line 102 inputs a positive bias voltage as a first rotation signal, so that the arc-shaped pixel electrode 103 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the negatively charged green areas G of the rotating particles 105 are rotated to the side near the arc-shaped pixel electrode 103, and the positively charged blue areas B are turned to the display side of the electrophoretic display device, so that the nth sub-pixel displays green.
Therefore, as shown in fig. 2, the red sub-pixel, the green sub-pixel, and the blue sub-pixel, which are sequentially arranged, constitute one pixel.
Further, as shown in fig. 4, when four subpixels of red, green, blue, and white constitute one pixel, two color regions 106, which are a white region W and a black region B1, are oppositely disposed on the rotating particles 105 located in the white subpixel. The white area W or the black area B1 is made to face the display side under the control of the first thin film transistor 104.
For example, as shown in fig. 4, when the mth sub-pixel is the white sub-pixel, the gate line 101 in the nth row inputs a turn-on signal to turn on the first thin film transistor 104, and then the data line 102 forming the mth sub-pixel inputs a negative bias as a first rotation signal, so that the arc-shaped pixel electrode 103 in the mth sub-pixel is negatively charged. According to the principle of attraction of different charges, the positively charged black area B1 of the rotating particles 105 rotates to the side near the arc-shaped pixel electrode 103, and the negatively charged white area W turns to the display side of the electrophoretic display device, so that the mth sub-pixel displays white. In this way, the luminance of the display screen can be effectively improved or the power consumption of the display screen can be effectively reduced by adding the white sub-pixel to the pixel composed of the red sub-pixel, the green sub-pixel, and the blue sub-pixel.
In the embodiment of the present invention, a set of red sub-pixel, sub-blue pixel and sub-green pixel is spaced between the two M-th sub-pixels, that is, a set of red sub-pixel, sub-blue pixel and sub-green pixel is spaced between the two white sub-pixels. Therefore, the electrophoretic display device can realize full-color display and avoid color mixing.
Further, the arc-shaped pixel electrode 103 includes a first sub-pixel electrode 1031 and a second sub-pixel electrode 1032 which are oppositely disposed. The first subpixel electrode 1031 is connected to the first thin film transistor 104; the nth sub-pixel further includes a second thin film transistor 107 connected to the second sub-pixel electrode 1032. The second thin film transistor 107 is disposed at the intersection of the nth gate line and the (N + 1) th data line. In this way, the rotation of the rotating particles 105 having two or more color regions 106 can be controlled by two thin film transistors, thereby realizing colorization of the electrophoretic display.
For example, three equally divided colored regions 106, namely, a red region R, a green region G, and a blue region B, are provided on the rotating particles 105 located in the red, green, and blue sub-pixels. The three equally divided color regions 106 mean that the red region R, the green region G, and the blue region B equally divide the circular cross section of the rotating particle 105.
Wherein the red region R may be uncharged; the green region G and the blue region B may carry different kinds of charges (nth subpixel in fig. 4); the predetermined region is directed to the display side under the control of the first thin film transistor 104 and the second thin film transistor 107. Specifically, when the nth sub-pixel is a red sub-pixel, the nth gate line 101 inputs an on signal to turn on the first thin film transistor 104 and the second thin film transistor 107. Then, a negative bias voltage is inputted to the nth data line 102 as a first rotation signal, so that the first sub-pixel electrode 1031 in the nth sub-pixel is negatively charged; the (N + 1) th column data line 102 inputs a positive bias voltage as the second rotation signal, so that the second sub-pixel electrode 1031 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the positively charged green areas G of the rotating particles 105 are rotated to the side near the arc-shaped pixel electrode 103, and the negatively charged blue areas B are turned to the display side of the electrophoretic display device, so that the nth sub-pixel displays red.
Or,
the green region G may be uncharged; the red region R and the blue region B may have different charges; the predetermined region is directed to the display side under the control of the first thin film transistor 104 and the second thin film transistor 107. The specific display control process is as described above.
Or,
blue region B is uncharged; the red region R and the green region G are charged with different charges, and the predetermined region is directed to the display side under the control of the first thin film transistor 104 and the second thin film transistor 107. The specific display control process is as described above.
For example, as shown in fig. 5, four equally divided color regions, namely, a red region R, a green region G, a blue region B, and a white region W are provided on the rotating particles 105 located in the red, green, and blue sub-pixels. The four equally divided color regions 106 are red regions R, green regions G, blue regions B, and white regions W that equally divide the circular cross section of the rotating particle 105.
One pair of oppositely disposed colored regions 106 is uncharged, and the other pair of oppositely disposed colored regions 106 is charged with a different species. For example, one pair of oppositely disposed white and green regions W and G are uncharged, the other pair of oppositely disposed red regions R are positively charged, and the blue regions B are negatively charged. The predetermined region is directed to the display side under the control of the first thin film transistor 104 and the second thin film transistor 107.
For example, when the nth sub-pixel is a red sub-pixel, the nth row gate line 101 inputs an on signal to turn on the first thin film transistor 104 and the second thin film transistor 107. Then, the nth column data line 102 inputs a positive bias voltage as a first rotation signal, so that the first sub-pixel electrode 1031 in the nth sub-pixel is positively charged; the (N + 1) th column data line 102 inputs a positive bias voltage as the second rotation signal, so that the second sub-pixel electrode 1031 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the negatively charged blue region B of the rotating particles 105 rotates to the side near the arc-shaped pixel electrode 103, and the positively charged red region R turns to the display side of the electrophoretic display device, so that the nth sub-pixel displays red.
Similarly, when the sub-pixel displays blue, the first and second rotation signals inputted to the nth column data line 102 and the (N + 1) th column data line 102 are opposite to the first and second rotation signals inputted when the sub-pixel displays red.
When the sub-pixel displays green, the gate line 101 inputs a turn-on signal to turn on the first thin film transistor 104 and the second thin film transistor 107; the nth column data line 102 inputs a positive bias voltage as the first rotation signal, so that the first sub-pixel electrode 1031 in the nth sub-pixel is positively charged; the (N + 1) th column data line 102 inputs a negative bias as the second rotation signal, so that the second sub-pixel electrode 1031 in the nth sub-pixel is negatively charged. The green region G without electric charge is turned to the display side of the electrophoretic display device, so that the nth sub-pixel displays green.
Similarly, when the subpixel displays white, the first and second rotation signals input to the nth column data line 102 and the N +1 th column data line 102 are opposite to the first and second rotation signals input when the subpixel displays green.
In this way, the rotating particles 105 having the four color regions 106 can be used for all red, blue, and green sub-pixels in the display panel of the electrophoretic display device. So that there is no need to arrange different rotating particles 105 for different color sub-pixels (as shown in fig. 4). Thereby simplifying the manufacturing process. Furthermore, the rotating particles 105 in each sub-pixel have a white area W. Therefore, the electrophoretic display device can realize not only full-color display but also black and white display.
Further, as shown in fig. 6, at least one black matrix 201 is disposed at an interval on a surface of the second substrate 20 away from the display side. The spacing region between adjacent two black matrices 201 corresponds to the position of the rotating particles 105. Thus, the region other than the black matrix 201 is an effective display region of the electrophoretic display device.
An embodiment of the present invention provides a method for manufacturing an electrophoretic display device, including a method for manufacturing a first substrate 10 and a second substrate 20 that are oppositely disposed, as shown in fig. 7, the method may further include:
s101, as shown in fig. 2, a gate line 101 and a data line 102 are formed on a surface of a transparent substrate (not shown) of the first substrate 10, wherein the gate line 101 and the data line 102 intersect to define at least one sub-pixel.
S102, a first thin film transistor 104 is disposed at an intersection of the nth gate line 101 and the nth data line 102.
And S103, forming an arc-shaped pixel electrode 103 with a groove 1030 on the surface in the Nth sub-pixel. The arc-shaped pixel electrode 103 is connected to the first thin film transistor 104.
S103, placing the rotating particles 105 in the groove 1030; the rotating particles 105 are provided with at least two color regions 106, and charges of at least one pair of color regions 105 are different, so that the rotating particles 105 rotate under the control of the first thin film transistor 104 to direct the preset region to the display side of the electrophoretic display device.
The predetermined region is a color region, and when the subpixel is predetermined to display a certain color, for example, red, the color of the predetermined region is red.
The specific control process of the first thin film transistor 104 may be that, when the pre-display color of the nth sub-pixel is red, the nth gate line 101 inputs a turn-on signal to turn on the first thin film transistor 104, and then the nth data line 102 inputs a positive bias voltage as a first rotation signal, so that the arc-shaped pixel electrode 103 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the negatively charged blue region B of the rotating particles 105 rotates to the side near the arc-shaped pixel electrode 103, and the positively charged red region R turns to the display side of the electrophoretic display device, so that the nth sub-pixel displays red.
The embodiment of the invention provides a manufacturing method of an electrophoretic display device. The electrophoretic display device includes a first substrate and a second substrate disposed opposite to each other. The first substrate comprises a grid line and a data line which are crossed transversely and longitudinally, and at least one sub-pixel is defined by the crossing of the grid line and the data line. The Nth sub-pixel comprises an arc-shaped pixel electrode and a first thin film transistor connected with the arc-shaped pixel electrode. Rotating particles are arranged in the grooves on the surface of the arc-shaped pixel electrode. The rotating particles are provided with at least two color areas, and charges of at least one pair of color areas are different, so that the rotating particles rotate under the control of the first thin film transistor, and the preset area faces the display side of the electrophoretic display device. In this way, since the manufacturing process of the first substrate is simple, and the control process of the pixel circuit on the substrate is easy to operate, has a fast response speed and high precision, the rotation direction of the rotating particles is controlled by the thin film transistor, so that the electrophoretic display device can be easily colorized, and the quality and effect of color display are improved.
Further, when three sub-pixels of red, green, and blue constitute one pixel, the method of disposing the colored region 106 on the rotating particle 105 includes:
two color regions 106, a red region R and a blue region B, or a red region R and a green region G, are oppositely disposed on the rotating particles 105 within the red sub-pixel. In this way, the red region can be directed to the display side under the control of the first thin film transistor 104. Specifically, as shown in fig. 2, when the nth sub-pixel is the red sub-pixel, the nth gate line 101 inputs a turn-on signal to turn on the first thin film transistor 104, and then the nth data line 102 inputs a positive bias voltage as a first rotation signal, so that the arc-shaped pixel electrode 103 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the negatively charged blue region B of the rotating particles 105 rotates to the side near the arc-shaped pixel electrode 103, and the positively charged red region R turns to the display side of the electrophoretic display device, so that the nth sub-pixel displays red.
Two colored regions 106, respectively a green region G and a red region R, or a green region G and a blue region B, are oppositely disposed on the rotating particles 105 within the green sub-pixel. Thus, the green region G can be directed to the display side under the control of the first thin film transistor 104. Specifically, as shown in fig. 2, when the nth sub-pixel is the green sub-pixel, the nth gate line 101 inputs a turn-on signal to turn on the first thin film transistor 104, and then the nth data line 102 inputs a positive bias voltage as a first rotation signal, so that the arc-shaped pixel electrode 103 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the red region R with negative charges of the rotating particles 105 rotates to the side close to the arc-shaped pixel electrode 103, and the green region G with positive charges turns to the display side of the electrophoretic display device, so that the nth sub-pixel displays green.
Two color regions 106, respectively a blue region B and a green region G, or a blue region B and a red region R, are oppositely arranged on the rotating particles 105 located in the blue sub-pixel. In this way, the blue region B can be directed to the display side under the control of the first thin film transistor 104. Specifically, as shown in fig. 2, when the nth sub-pixel is the blue sub-pixel, the nth gate line 101 inputs a turn-on signal to turn on the first thin film transistor 104, and then the nth data line 102 inputs a positive bias voltage as a first rotation signal, so that the arc-shaped pixel electrode 103 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the negatively charged green areas G of the rotating particles 105 are rotated to the side near the arc-shaped pixel electrode 103, and the positively charged blue areas B are turned to the display side of the electrophoretic display device, so that the nth sub-pixel displays green.
Therefore, as shown in fig. 2, the red sub-pixel, the green sub-pixel, and the blue sub-pixel, which are sequentially arranged, constitute one pixel.
In addition, the order of manufacturing the rotating particles 105 corresponding to the red sub-pixel, the green sub-pixel, and the blue sub-pixel is not limited in the embodiment of the present invention.
Further, when four sub-pixels of red, green, blue, and white constitute one pixel, the method of disposing the colored region 106 on the rotating particle 105 may further include:
two colored regions 106, respectively a white region W and a black region B1, are oppositely disposed on the rotating particles 105 within the white sub-pixel. In this way, the white region W or the black region B1 can be directed to the display side under the control of the first thin film transistor 104. Specifically, as shown in fig. 4, when the mth sub-pixel is the white sub-pixel, the gate line 101 in the nth row inputs a turn-on signal to turn on the first thin film transistor 104, and then the data line 102 forming the mth sub-pixel inputs a negative bias as a first rotation signal, so that the arc-shaped pixel electrode 103 in the mth sub-pixel is negatively charged. According to the principle of attraction of different charges, the positively charged black area B1 of the rotating particles 105 rotates to the side near the arc-shaped pixel electrode 103, and the negatively charged white area W turns to the display side of the electrophoretic display device, so that the mth sub-pixel displays white. In this way, the luminance of the display screen can be effectively improved or the power consumption of the display screen can be effectively reduced by adding the white sub-pixel to the pixel composed of the red sub-pixel, the green sub-pixel, and the blue sub-pixel.
Further, as shown in fig. 8, the method of manufacturing an electrophoretic display device may further include:
s201, forming a first sub-pixel electrode 1031 and a second sub-pixel electrode 1032 which are oppositely arranged in the nth sub-pixel. The first subpixel electrode 1031 and the second subpixel electrode 1032 form an arc-shaped pixel electrode 103.
S202, forming a second thin film transistor 107 in the nth sub-pixel at the intersection of the nth gate line 101 and the (N + 1) th data line 102.
Wherein the first subpixel electrode 1031 is connected to the first thin film transistor 104; the second subpixel electrode 1032 is connected to the second thin film transistor 107. In this way, the rotation of the rotating particles 105 having two or more color regions 106 can be controlled by two thin film transistors, thereby realizing colorization of the electrophoretic display.
For example, a method of providing more than two colored regions 106 on a rotating particle 105 may include:
on the rotating particles 105 located in the red, green and blue sub-pixels, three equally divided color regions 106 are provided, which are a red region R, a green region G and a blue region B, respectively.
Wherein the red region R may be uncharged; the green region G and the blue region B may carry different charges (nth subpixel in fig. 4). Thus, the predetermined region can be directed to the display side under the control of the first thin film transistor 104 and the second thin film transistor 107. Specifically, when the nth sub-pixel is a red sub-pixel, the nth gate line 101 inputs an on signal to turn on the first thin film transistor 104 and the second thin film transistor 107. Then, a negative bias voltage is inputted to the nth data line 102 as a first rotation signal, so that the first sub-pixel electrode 1031 in the nth sub-pixel is negatively charged; the (N + 1) th column data line 102 inputs a positive bias voltage as the second rotation signal, so that the second sub-pixel electrode 1031 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the positively charged green areas G of the rotating particles 105 are rotated to the side near the arc-shaped pixel electrode 103, and the negatively charged blue areas B are turned to the display side of the electrophoretic display device, so that the nth sub-pixel displays red.
Or,
the green region G may be uncharged; the red region R and the blue region B may have different charges. Thus, the predetermined region can be directed to the display side under the control of the first thin film transistor 104 and the second thin film transistor 107. The specific display control process is as described above.
Or,
the blue region B may be uncharged; the red region R and the green region G carry different charges. Thus, the predetermined region can be oriented to the display side under the control of the first thin film transistor 104 and the second thin film transistor 107. The specific display control process is as described above.
Note that, in the embodiment of the present invention, the order of the charge distribution setting method for each color region 106 on the rotating particle 105 is not limited.
For another example, the method of providing two or more colored regions 106 on the rotating particle 105 may further include:
on the rotating particles 105 located in the red, green, and blue sub-pixels, four equally divided color regions 105 are provided, which are a red region R, a green region G, a blue region B, and a white region W, respectively.
One pair of oppositely disposed colored regions 106 is uncharged, and the other pair of oppositely disposed colored regions 106 is charged with a different species. For example, one pair of oppositely disposed white and green regions W and G are uncharged, the other pair of oppositely disposed red regions R are positively charged, and the blue regions B are negatively charged. Thus, the predetermined region can be directed to the display side under the control of the first thin film transistor 104 and the second thin film transistor 107.
Specifically, when the nth sub-pixel is a red sub-pixel, the nth gate line 101 inputs an on signal to turn on the first thin film transistor 104 and the second thin film transistor 107. Then, the nth column data line 102 inputs a positive bias voltage as a first rotation signal, so that the first sub-pixel electrode 1031 in the nth sub-pixel is positively charged; the (N + 1) th column data line 102 inputs a positive bias voltage as the second rotation signal, so that the second sub-pixel electrode 1031 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the negatively charged blue region B of the rotating particles 105 rotates to the side near the arc-shaped pixel electrode 103, and the positively charged red region R turns to the display side of the electrophoretic display device, so that the nth sub-pixel displays red.
Similarly, when the sub-pixel displays blue, the first and second rotation signals inputted to the nth column data line 102 and the (N + 1) th column data line 102 are opposite to the first and second rotation signals inputted when the sub-pixel displays red.
When the sub-pixel displays green, the gate line 101 inputs a turn-on signal to turn on the first thin film transistor 104 and the second thin film transistor 107; the nth column data line 102 inputs a positive bias voltage as the first rotation signal, so that the first sub-pixel electrode 1031 in the nth sub-pixel is positively charged; the (N + 1) th column data line 102 inputs a negative bias as the second rotation signal, so that the second sub-pixel electrode 1031 in the nth sub-pixel is negatively charged. The green region G without electric charge is turned to the display side of the electrophoretic display device, so that the nth sub-pixel displays green.
Similarly, when the sub-pixel displays white, the first and second rotation signals inputted to the nth column data line 102 and the (N + 1) th column data line 102 are opposite to the first and second rotation signals inputted when the sub-pixel displays green.
In this way, the rotating particles 105 having the four color regions 106 can be used for all red, blue, and green sub-pixels in the display panel of the electrophoretic display device. So that there is no need to arrange different rotating particles 105 for different color sub-pixels (as shown in fig. 4). Thereby simplifying the manufacturing process. Furthermore, the rotating particles 105 in each sub-pixel have a white area W. Therefore, the electrophoretic display device can realize not only full-color display but also black and white display.
The embodiment of the invention provides a display method of an electrophoretic display device, which comprises a method for controlling any one electrophoretic display device to display. The same advantages as those of the electrophoretic display device provided in the foregoing embodiments of the invention are obtained, and since the electrophoretic display device has been described in detail in the foregoing embodiments, further description is omitted here.
The embodiment of the invention provides a display method of an electrophoretic display device. The first substrate comprises a grid line and a data line which are crossed transversely and longitudinally, and at least one sub-pixel is defined by the crossing of the grid line and the data line. The Nth sub-pixel comprises an arc-shaped pixel electrode and a first thin film transistor connected with the arc-shaped pixel electrode. Rotating particles are arranged in the grooves on the surface of the arc-shaped pixel electrode. The rotating particles are provided with at least two color regions, and at least one pair of color regions have different charges, so that the rotating particles rotate under the control of the first thin film transistor to face the preset region to the display side of the electrophoretic display device. In this way, since the manufacturing process of the first substrate is simple, and the control process of the pixel circuit on the substrate is easy to operate, has a fast response speed and high precision, the rotation direction of the rotating particles is controlled by the thin film transistor, so that the electrophoretic display device can be easily colorized, and the quality and effect of color display are improved.
Further, when the electrophoretic display device has two color regions 106 on the rotating particles 105, as shown in fig. 9, the display method may include:
s301, when the rotating particles 105 are positioned on the surface of the arc-shaped pixel electrode 103; the nth row gate line 101 inputs a turn-on signal to turn on the first thin film transistor 104 connected to the arc-shaped pixel electrode 103.
S302, the nth data line 102 connected to the first thin film transistor 104 receives the first rotation signal.
In S303, the charges of the color regions 106 are different, and the rotating particles 105 rotate according to the first rotation signal to direct the predetermined region to the display side of the electrophoretic display device.
Specifically, as shown in fig. 2, for example, when the rotating particle 105 is located on the surface of the arc-shaped pixel electrode 103, the gate line 101 in the nth row inputs a turn-on signal to turn on the first thin film transistor 104, and then the data line 102 in the nth column inputs a positive bias voltage as a first rotation signal, so that the arc-shaped pixel electrode 103 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the negatively charged blue region B of the rotating particles 105 rotates to the side near the arc-shaped pixel electrode 103, and the positively charged red region R turns to the display side of the electrophoretic display device, so that the nth sub-pixel displays red.
Further, when the rotating particles 105 in the electrophoretic display device have at least three color 106 regions thereon, as shown in fig. 10, the display method may further include:
s401, when the rotating particles 105 are located on the surface of the oppositely arranged first and second sub-pixel electrodes 1031, 1032; the nth row gate line 101 inputs an on signal to turn on the first thin film transistor 104 connected to the first subpixel electrode 1031 and the second thin film transistor 107 connected to the second subpixel electrode 1032.
S402, the nth data line 102 connected to the first thin film transistor 104, and the (N + 1) th data line 102 connected to the second thin film transistor 104 input the first rotation signal and the second rotation signal, respectively.
At least a pair of color regions 106 of the rotating particles 105 have different charges, and are rotated according to the first rotation signal and the second rotation signal to direct the predetermined region to the display side.
For example, as shown in fig. 5, one pair of oppositely disposed white areas W and green areas G are not charged, the other pair of oppositely disposed red areas R are positively charged, and the blue areas B are negatively charged. The predetermined region is directed to the display side under the control of the first thin film transistor 104 and the second thin film transistor 107.
Specifically, for example, when the nth sub-pixel displays red, when the rotating particles 105 are located on the surfaces of the first sub-pixel electrode 1031 and the second sub-pixel electrode 1032 which are oppositely arranged, the nth row gate line 101 inputs the turn-on signal to turn on the first thin film transistor 104 and the second thin film transistor 107. Then, the nth column data line 102 inputs a positive bias voltage as a first rotation signal, so that the first sub-pixel electrode 1031 in the nth sub-pixel is positively charged; the (N + 1) th column data line 102 inputs a positive bias voltage as the second rotation signal, so that the second sub-pixel electrode 1031 in the nth sub-pixel is positively charged. According to the principle of attraction of different charges, the negatively charged blue region B of the rotating particles 105 rotates to the side near the arc-shaped pixel electrode 103, and the positively charged red region R turns to the display side of the electrophoretic display device, so that the nth sub-pixel displays red.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (18)
1. An electrophoretic display device comprising a first substrate and a second substrate arranged opposite to each other,
the first substrate comprises a grid line and a data line which are crossed transversely and longitudinally, and at least one sub-pixel is defined by the crossing of the grid line and the data line;
the Nth sub-pixel comprises an arc-shaped pixel electrode, a first thin film transistor and a second thin film transistor; the arc-shaped pixel electrode comprises a first sub-pixel electrode and a second sub-pixel electrode which are oppositely arranged, the first sub-pixel electrode is connected with the first thin film transistor, the second sub-pixel electrode is connected with the second thin film transistor, the first thin film transistor is arranged at the intersection of the Nth grid line and the Nth data line, and the second thin film transistor is arranged at the intersection of the Nth grid line and the (N + 1) th data line;
the surface of the arc pixel electrode is provided with a groove; rotating particles are arranged in the groove;
the rotating particles are provided with at least three color areas, wherein at least one pair of the color areas have different charges, so that the rotating particles rotate under the control of the first thin film transistor and the second thin film transistor, and a preset area faces the display side of the electrophoretic display device.
2. Electrophoretic display device according to claim 1,
when three sub-pixels of red, green and blue are included in one pixel,
the rotating particles in the red, green and blue sub-pixels are respectively provided with three equally divided color areas which are respectively a red area, a green area and a blue area;
wherein the red region is uncharged; the green area and the blue area are provided with different charges; enabling the preset area to face the display side under the control of the first thin film transistor and the second thin film transistor; or,
the green region is uncharged; the red region and the blue region carry different charges; enabling the preset area to face the display side under the control of the first thin film transistor and the second thin film transistor; or,
the blue region is uncharged; the red region and the green region are charged with different charges, and the predetermined region is made to face the display side under the control of the first thin film transistor and the second thin film transistor.
3. Electrophoretic display device according to claim 1,
when three sub-pixels of red, green and blue are included in one pixel,
four equally divided colored regions are respectively arranged on the rotating particles in the red, green and blue sub-pixels, wherein the four equally divided colored regions are respectively a red region, a green region, a blue region and a white region;
wherein one pair of the oppositely disposed colored regions has no charge, and the other pair of the oppositely disposed colored regions has a different charge; and under the control of the first thin film transistor and the second thin film transistor, enabling the preset area to face the display side.
4. An electrophoretic display device as claimed in any one of claims 1 to 3, wherein the rotating particles are cylinders, the central axis of the cylinders being parallel to the first substrate or the second substrate.
5. The electrophoretic display device according to claim 1, wherein a surface of the second substrate on a side away from the display side is provided with at least one black matrix at intervals; and the spacing region between two adjacent black matrixes corresponds to the position of the rotating particles.
6. An electrophoretic display device comprising a first substrate and a second substrate arranged opposite to each other,
the first substrate comprises a grid line and a data line which are crossed transversely and longitudinally, and at least one sub-pixel is defined by the crossing of the grid line and the data line;
the Nth sub-pixel comprises an arc-shaped pixel electrode and a first thin film transistor connected with the arc-shaped pixel electrode; the first thin film transistor is arranged at the intersection of the Nth grid line and the Nth data line;
the surface of the arc pixel electrode is provided with a groove; rotating particles are arranged in the groove;
the rotating particles comprise rotating particles provided with two color regions and rotating particles provided with at least three color regions;
when the rotating particles are rotating particles provided with two color regions, wherein the charges of the two color regions are different, so that the rotating particles rotate under the control of the first thin film transistor, and a preset region faces the display side of the electrophoretic display device;
when the rotating example is rotating particles provided with at least three color areas, the arc-shaped pixel electrode comprises a first sub-pixel electrode and a second sub-pixel electrode which are oppositely arranged, and the first sub-pixel electrode is connected with the first thin film transistor; the nth sub-pixel further comprises a second thin film transistor connected with the second sub-pixel electrode, the second thin film transistor is arranged at the intersection of the nth grid line and the (N + 1) th data line, and at least one pair of color regions in the at least three color regions have different charges, so that the rotating particles rotate under the control of the first thin film transistor and the second thin film transistor to enable a preset region to face the display side of the electrophoretic display device;
when a pixel is formed by four red, green, blue and white sub-pixels, two color regions, namely a white region and a black region, are oppositely arranged on the rotating particles positioned in the white sub-pixel; the white region or the black region is made to face the display side under control of the first thin film transistor.
7. An electrophoretic display device as claimed in claim 6, wherein three equally divided regions of said color are provided on said rotating particles within said red, green and blue sub-pixels, respectively red, green and blue regions;
wherein the red region is uncharged; the green area and the blue area are provided with different charges; enabling the preset area to face the display side under the control of the first thin film transistor and the second thin film transistor; or,
the green region is uncharged; the red region and the blue region carry different charges; enabling the preset area to face the display side under the control of the first thin film transistor and the second thin film transistor; or,
the blue region is uncharged; the red region and the green region are charged with different charges, and the predetermined region is made to face the display side under the control of the first thin film transistor and the second thin film transistor.
8. An electrophoretic display device as claimed in claim 6, wherein four equally divided regions of said color, red, green, blue and white, are provided on said rotating particles within said red, green and blue sub-pixels;
wherein one pair of the oppositely disposed colored regions has no charge, and the other pair of the oppositely disposed colored regions has a different charge; and under the control of the first thin film transistor and the second thin film transistor, enabling the preset area to face the display side.
9. An electrophoretic display device as claimed in any one of claims 6 to 8, wherein the rotating particles are cylinders, and the central axis of the cylinders is parallel to the first substrate or the second substrate.
10. The electrophoretic display device according to claim 6, wherein a surface of the second substrate on a side away from the display side is provided with at least one black matrix at intervals; and the spacing region between two adjacent black matrixes corresponds to the position of the rotating particles.
11. A method of manufacturing an electrophoretic display device, comprising a method of manufacturing a first substrate and a second substrate which are arranged opposite to each other, the method comprising:
forming a grid line and a data line which are crossed transversely and longitudinally on the surface of a transparent substrate of the first substrate, wherein the grid line and the data line are crossed to define at least one sub-pixel;
forming a first sub-pixel electrode and a second sub-pixel electrode which are oppositely arranged in the Nth sub-pixel; the first sub-pixel electrode and the second sub-pixel electrode form an arc-shaped pixel electrode, and the surface of the arc-shaped pixel electrode is provided with a groove;
arranging a first thin film transistor at the intersection of the Nth grid line and the Nth data line;
forming a second thin film transistor positioned in the Nth sub-pixel at the intersection of the Nth grid line and the (N + 1) th data line;
the first sub-pixel electrode is connected with the first thin film transistor; the second sub-pixel electrode is connected with the second thin film transistor;
placing rotating particles in the groove; the rotating particles are provided with at least three color areas, and charges of at least one pair of the color areas are different, so that the rotating particles rotate under the control of the first thin film transistor and the second thin film transistor, and a preset area faces the display side of the electrophoretic display device.
12. The method of claim 11, wherein when three sub-pixels of red, green, and blue are included in one pixel, the method of providing a color region on the rotating particle comprises:
arranging three equally-divided color areas, namely a red area, a green area and a blue area, on the rotating particles in the red sub-pixel, the green sub-pixel and the blue sub-pixel;
the red region is uncharged; the green region and the blue region carry different charges; or,
the green region is not charged; the red region and the blue region carry dissimilar charges; or,
the blue region is uncharged; the red region and the green region carry different charges;
or,
four equally divided color areas are arranged on the rotating particles in the red, green and blue sub-pixels, wherein the color areas are respectively a red area, a green area, a blue area and a white area;
wherein one pair of the oppositely disposed colored regions is not charged, and the other pair of the oppositely disposed colored regions is charged with a different kind of charge.
13. A method of manufacturing an electrophoretic display device, comprising a method of manufacturing a first substrate and a second substrate which are arranged opposite to each other, the method comprising:
forming a grid line and a data line which are crossed transversely and longitudinally on the surface of a transparent substrate of the first substrate, wherein the grid line and the data line are crossed to define at least one sub-pixel;
arranging a first thin film transistor at the intersection of the Nth grid line and the Nth data line;
forming an arc-shaped pixel electrode with a groove on the surface in the Nth sub-pixel; the arc pixel electrode is connected with the first thin film transistor;
rotating particles of two color regions are arranged in the groove, and the charges of the two color regions are different, so that the rotating particles rotate under the control of the first thin film transistor, and a preset region faces to the display side of the electrophoretic display device;
the manufacturing method further includes: forming a first sub-pixel electrode and a second sub-pixel electrode which are oppositely arranged in the Nth sub-pixel; the first sub-pixel electrode and the second sub-pixel electrode form the arc-shaped pixel electrode, and the surface of the arc-shaped pixel electrode is provided with a groove;
arranging a first thin film transistor at the intersection of the Nth grid line and the Nth data line;
forming a second thin film transistor positioned in the Nth sub-pixel at the intersection of the Nth grid line and the (N + 1) th data line;
the first sub-pixel electrode is connected with the first thin film transistor; the second sub-pixel electrode is connected with the second thin film transistor;
at least three rotating particles of color regions are arranged in the groove, and charges of at least one pair of the color regions are different, so that the rotating particles rotate under the control of the first thin film transistor and the second thin film transistor, and a preset region faces the display side of the electrophoretic display device;
when four sub-pixels of red, green, blue and white constitute one pixel, the method of disposing a colored region on the rotating particle further includes:
and oppositely arranging two color areas, namely a white area and a black area, on the rotating particles in the white sub-pixel.
14. A display method of an electrophoretic display device, comprising a method of controlling the electrophoretic display device according to any one of claims 1 to 5 to perform display.
15. The display method of an electrophoretic display device according to claim 14, comprising:
when the rotating particles are positioned on the surfaces of the first sub-pixel electrode and the second sub-pixel electrode which are oppositely arranged; inputting a starting signal to an Nth row of grid lines to turn on the first thin film transistor connected with the first sub-pixel electrode and the second thin film transistor connected with the second sub-pixel electrode;
the Nth data line connected with the first thin film transistor and the (N + 1) th data line connected with the second thin film transistor respectively input a first rotation signal and a second rotation signal;
at least one pair of color regions of the rotating particles have different charges, and are rotated according to the first rotation signal and the second rotation signal to direct a preset region to the display side.
16. A display method of an electrophoretic display device, comprising a method of controlling the electrophoretic display device according to any one of claims 6 to 10 to perform display.
17. The method according to claim 16, wherein when the electrophoretic display device has two colored regions on the rotating particles, the method comprises:
when the rotating particles are positioned on the surface of the arc-shaped pixel electrode; inputting a starting signal to the Nth row of grid lines to turn on a first thin film transistor connected with the arc-shaped pixel electrode;
inputting a first rotation signal to an Nth row of data lines connected with the first thin film transistor;
the two color regions have different charges, and the rotating particles rotate according to the first rotation signal to enable the preset region to face the display side of the electrophoretic display device.
18. The method of displaying in an electrophoretic display device according to claim 16, wherein when the rotating particles in the electrophoretic display device have at least three colored regions thereon, the method further comprises:
when the rotating particles are positioned on the surfaces of the first sub-pixel electrode and the second sub-pixel electrode which are oppositely arranged; inputting a starting signal to an Nth row of grid lines to turn on the first thin film transistor connected with the first sub-pixel electrode and the second thin film transistor connected with the second sub-pixel electrode;
the Nth data line connected with the first thin film transistor and the (N + 1) th data line connected with the second thin film transistor respectively input a first rotation signal and a second rotation signal;
at least one pair of color regions of the rotating particles have different charges, and are rotated according to the first rotation signal and the second rotation signal to direct a preset region to the display side.
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