CN210465919U - Display panel with switchable viewing angles and display device - Google Patents
Display panel with switchable viewing angles and display device Download PDFInfo
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- CN210465919U CN210465919U CN201921464988.1U CN201921464988U CN210465919U CN 210465919 U CN210465919 U CN 210465919U CN 201921464988 U CN201921464988 U CN 201921464988U CN 210465919 U CN210465919 U CN 210465919U
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Abstract
The utility model discloses a display panel with switchable visual angles, which comprises a color film substrate, an array substrate and a liquid crystal layer positioned between the color film substrate and the array substrate, wherein a plurality of scanning lines and a plurality of data lines are mutually insulated and crossed to form a plurality of pixel units on the array substrate, a plurality of black matrix strips which are transversely and longitudinally crossed are arranged on the color film substrate, the plurality of black matrix strips comprise a first black matrix strip corresponding to the plurality of scanning lines and a second black matrix strip corresponding to the plurality of data lines, the area corresponding to the pixel units on the color film substrate is provided with a first electrode and a second electrode which are color-resistant and mutually insulated, the first electrode and the second electrode are used for controlling the visual angle switching, the black matrix strips, the color resistance layer, the first electrode and the second electrode are positioned on the same side of the color film substrate, the second electrode is closer to the liquid crystal layer than the first electrode, the first electrode is of a whole-surface structure, and the second electrode is of a patterned structure covering the first black matrix strip or/and the second black matrix strip. The utility model also discloses a display device.
Description
Technical Field
The utility model relates to a liquid crystal display technology field especially relates to a changeable display panel of visual angle and display device.
Background
With the continuous progress of the liquid crystal display technology, the viewing angle of the display has been widened from about 120 ° to over 160 °, and people want to effectively protect business confidentiality and personal privacy while enjoying visual experience brought by a large viewing angle, so as to avoid business loss or embarrassment caused by the leakage of screen information.
The current display device gradually develops towards the direction of wide viewing angle, and no matter the application of mobile phone terminal, desktop display or notebook computer, besides the requirement of wide viewing angle, in many occasions, the display device is also required to have the function of switching between wide viewing angle and narrow viewing angle. At present, there are several ways to switch between a wide viewing angle and a narrow viewing angle of a liquid crystal display device.
The first is realized by attaching a shutter shielding film on the display screen, and when peep prevention is needed, the view angle can be reduced by shielding the screen by the shutter shielding film. However, in this method, an extra louver film is required to be prepared, which causes great inconvenience to a user, and one louver film can only realize one viewing angle, and once the louver film is attached, the viewing angle is fixed, and only a narrow viewing angle mode can be realized, and the wide viewing angle function cannot be displayed.
The second is to arrange a dual light source backlight system in the lcd device for adjusting the viewing angle of the lcd device, the dual light source backlight system is composed of two stacked light guide plates combined with an inverse prism sheet, the top light guide plate (LGP-T) combined with the inverse prism sheet changes the direction of the light so that the light is limited in a relatively narrow angular range, thereby realizing the narrow viewing angle of the lcd device, while the bottom light guide plate (LGP-B) combined with the inverse prism sheet functions to realize the wide viewing angle of the lcd device. However, such a dual-light source backlight system increases the thickness and cost of the liquid crystal display device, and is not suitable for the trend of thinning the liquid crystal display device.
The third is to apply a vertical electric field to the liquid crystal molecules by using a viewing angle control electrode on one side of a color film substrate (CF), thereby realizing a narrow viewing angle mode. This mode can only realize the wide and narrow visual angle switching in the left and right direction, can not realize the narrow visual angle in left and right direction and upper and lower direction simultaneously, can not realize diversified narrow visual angle promptly.
Although the existing display panels realize the switching of wide and narrow viewing angles, the transmittance and contrast are low, and the display effect is poor.
SUMMERY OF THE UTILITY MODEL
In order to overcome the shortcoming and the deficiency that exist among the prior art, the utility model aims to provide a changeable display panel of visual angle and display device to it is lower to solve display panel transmissivity and contrast among the prior art, leads to the not good problem of display effect.
The purpose of the utility model is realized through the following technical scheme:
the utility model provides a display panel with switchable visual angles, which comprises a color film substrate, an array substrate arranged opposite to the color film substrate and a liquid crystal layer positioned between the color film substrate and the array substrate, wherein a plurality of pixel units are formed on the array substrate by mutually insulating and intersecting a plurality of scanning lines and a plurality of data lines, a pixel electrode and a thin film transistor are arranged in each pixel unit, the pixel electrode is electrically connected with the scanning lines and the data lines adjacent to the thin film transistor through the thin film transistor, a plurality of black matrix strips which are transversely and longitudinally intersected are arranged on the color film substrate, the black matrix strips comprise a first black matrix strip corresponding to the scanning lines and a second black matrix strip corresponding to the data lines, a color resistance layer is arranged on the area corresponding to the pixel units on the color film substrate, and a first electrode and a second electrode which are mutually insulated are also arranged on the color film substrate, the first electrode and the second electrode are used for controlling visual angle switching, the black matrix strip, the color resistance layer, the first electrode and the second electrode are positioned on the same side of the color film substrate, the second electrode is closer to the liquid crystal layer than the first electrode, the first electrode is of a whole surface structure, and the second electrode is of a patterned structure covering the first black matrix strip or/and the second black matrix strip.
Further, the width of the second electrode is greater than the width of the black matrix stripe.
Furthermore, the width of the side edge of the second electrode beyond the black matrix strip is d, and the value range of d is 0-30 μm.
Furthermore, the second electrode extends along the direction of the scanning line and covers the first black matrix strip.
Furthermore, the second electrode extends along the direction of the data line and covers the second black matrix strip.
Further, the second electrode extends along the direction of the scanning line and the data line and covers the first black matrix strip and the second black matrix strip at the same time.
Further, the first electrode and the second electrode are electrically connected and apply the same electrical signal.
Furthermore, the first electrode is positioned between the black matrix strip and the color resistance layer, and the second electrode is positioned on the color resistance layer.
Furthermore, a common electrode is further arranged on the array substrate, and the common electrode and the pixel electrode are located on different layers and are insulated from each other.
The utility model also provides a display device, include as above the changeable display panel of visual angle.
The utility model has the advantages that: the color film substrate is provided with a plurality of horizontally and vertically crossed black matrix strips, a first electrode and a second electrode which are insulated with each other, the black matrix strips comprise a first black matrix strip corresponding to a plurality of scanning lines and a second black matrix strip corresponding to a plurality of data lines, the first electrode and the second electrode are used for controlling visual angle switching, the black matrix strips, the color resistance layer, the first electrode and the second electrode are positioned on the same side of the color film substrate, the second electrode is closer to the liquid crystal layer than the first electrode, the first electrode is of a whole-face structure, and the second electrode is of a patterned structure covering the first black matrix strip or/and the second black matrix strip. Through the mutual cooperation of first electrode and second electrode, not only can realize the switching of width visual angle, still promoted display panel's contrast and transmissivity.
Drawings
Fig. 1 is a schematic circuit diagram of an array substrate according to the present invention;
fig. 2 is one of schematic plane structures of a color filter substrate according to the present invention;
fig. 3 is a schematic structural diagram of an array substrate according to the present invention;
fig. 4 is a schematic cross-sectional view of the display panel in the present invention at a wide viewing angle;
fig. 5 is a schematic cross-sectional view of the display panel in the narrow viewing angle of the present invention;
fig. 6 is a second schematic plan view of the color filter substrate according to the present invention;
fig. 7 is a third schematic plan view of a color filter substrate according to the present invention;
fig. 8 is a schematic plan view of a display device according to the present invention;
fig. 9 is a second schematic plan view of the display device of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the objectives of the present invention, the following detailed description will be made in conjunction with the accompanying drawings and preferred embodiments of the present invention for the specific embodiments, structures, features and effects of the display panel and the display device with switchable viewing angles according to the present invention as follows:
fig. 1 is the circuit structure schematic diagram of the middle array substrate of the present invention, fig. 2 is one of the plane structure schematic diagrams of the middle color film substrate of the present invention, fig. 3 is the structure schematic diagram of the middle array substrate of the present invention, fig. 4 is the cross-sectional structure schematic diagram of the middle display panel at the wide viewing angle of the present invention, fig. 5 is the cross-sectional structure schematic diagram of the middle display panel at the narrow viewing angle of the present invention, fig. 6 is the second plane structure schematic diagram of the middle color film substrate of the present invention, fig. 7 is the third plane structure schematic diagram of the middle color film substrate of the present invention.
As shown in fig. 1 to 7, the utility model provides a display panel with switchable viewing angles, including a color film substrate 10, an array substrate 20 arranged opposite to the color film substrate 10, and a liquid crystal layer 30 located between the color film substrate 10 and the array substrate 20. In the liquid crystal layer 30, positive liquid crystal molecules, that is, liquid crystal molecules having positive dielectric anisotropy, are used, and in an initial state, the positive liquid crystal molecules in the liquid crystal layer 30 are aligned parallel to the color film substrate 10 and the array substrate 20, the alignment direction of the positive liquid crystal molecules near the color film substrate 10 is antiparallel to the alignment direction of the positive liquid crystal molecules near the array substrate 20, and at this time, the display panel has a wide viewing angle. Certainly, the positive liquid crystal molecules may have a smaller pretilt angle (e.g., smaller than 7 °) during initial alignment, that is, the positive liquid crystal molecules initially form a smaller included angle with the color filter substrate 10 and the array substrate 20, and the positive liquid crystal molecules may be accelerated to deflect toward the vertical direction when switching to the narrow viewing angle.
As shown in fig. 1 and fig. 3, a plurality of scanning lines 1, a plurality of data lines 2 and thin film transistors 3 are disposed on one side of the array substrate 20 facing the liquid crystal layer 30, a plurality of pixel units P are defined on the array substrate 20 by the plurality of scanning lines 1 and the plurality of data lines 2 being insulated from each other and crossed, a pixel electrode 23 and a thin film transistor 3 are disposed in each pixel unit P, the pixel electrode 23 is electrically connected to the scanning lines 1 and the data lines 2 of adjacent thin film transistors 3 through the thin film transistor 3, and a common electrode 21 is further disposed on one side of the array substrate 20 facing the liquid crystal layer 30. The common electrode 21 may be located above or below the pixel electrode 23 (the common electrode 21 is located below the pixel electrode 23 as shown in fig. 4), and preferably, the common electrode 21 is a planar electrode disposed over the entire surface, and the pixel electrode 23 is a block electrode disposed in one piece in each pixel unit P or a slit electrode having a plurality of electrode bars to form a Fringe Field Switching (FFS) mode. Of course, In other embodiments, the pixel electrode 23 and the common electrode 21 are located on the same layer, but they are insulated and isolated from each other, and each of the pixel electrode 23 and the common electrode 21 may include a plurality of electrode stripes, and the electrode stripes of the pixel electrode 23 and the electrode stripes of the common electrode 21 are alternately arranged with each other to form an In-Plane Switching (IPS) mode. The thin film transistor 3 includes a gate electrode 31, an active layer 32, a drain electrode 33, and a source electrode 34, the gate electrode 31 and the plurality of scan lines 1 are located in the same layer and electrically connected, the gate electrode 31 and the active layer 32 are insulated and isolated by a second insulating layer 201, the second insulating layer 201 covers the drain electrode 33, the source electrode 34, and the data line 2, the source electrode 34 is electrically connected to the data line 2, the drain electrode 33 is electrically connected to the pixel electrode 23 through a via hole, a third insulating layer 202 covers the drain electrode 33, the source electrode 34, and the data line 2, and a first flat layer 203 is disposed between the third insulating layer 202 and the common electrode 21.
The color film substrate 10 is provided with a plurality of black matrix stripes 11 which are crossed horizontally and vertically, the plurality of black matrix stripes 11 include a first black matrix stripe 111 corresponding to the plurality of scanning lines 1 and a second black matrix stripe 112 corresponding to the plurality of data lines 2, and further, the first black matrix stripe 111 and the second black matrix stripe 112 are arranged in the same layer. A color resist layer 13 is disposed in an area corresponding to the plurality of pixel units P on the color filter substrate 10, the color resist layer 13 includes color resist materials of three colors of red (R), green (G), and blue (B), and sub-pixels of the three colors of red (R), green (G), and blue (B) are correspondingly formed, a first electrode 12 and a second electrode 14 which are insulated from each other are further disposed on the color filter substrate 10, the first electrode 12 and the second electrode 14 are used for controlling the switching of the viewing angle, the black matrix stripe 11, the color resist layer 13, the first electrode 12, and the second electrode 14 are located on the same side of the color filter substrate 10, the second electrode 14 is closer to the liquid crystal layer 30 than the first electrode 12, the first electrode 12 is of a full-surface structure, and the second electrode 14 is of a patterned structure covering the first black matrix stripe 111 or/and the second black matrix stripe 112. The color filter substrate 10 is further provided with an upper polarizer (not shown), and the array substrate 20 is further provided with a lower polarizer (not shown), wherein the transmission axes of the upper polarizer and the lower polarizer are perpendicular to each other.
In this embodiment, the color filter substrate 10 is further provided with a second flat layer 15, the black matrix stripe 11, the color resistance layer 13, the first electrode 12, and the second electrode 14 are located on the same side of the color filter substrate 10, the first electrode 12 is located between the black matrix stripe 11 and the color resistance layer 13, and the second electrode 14 is located between the color resistance layer 13 and the second flat layer 15. The first electrode 12 and the second electrode 14 are electrically connected and apply the same electrical signal, for example, the electrical connection may be performed in the non-display area, or of course, the color resist layer 13 may be perforated and electrically connected through a via hole. In other embodiments, the second electrode 14 may also be located on a side of the second planarization layer 15 facing the liquid crystal layer 30, and is not limited thereto.
In this embodiment, as shown in fig. 2, the second electrode 14 extends along the direction of the scan line 1 and corresponds to the first black matrix stripe 111, and the second electrode 14 only covers the first black matrix stripe 111. Of course, in other embodiments, as shown in fig. 6, the second electrodes 14 extend along the direction of the data lines 2 and correspond to the second black matrix stripes 112, and the second electrodes 14 cover only the second black matrix stripes 112. More alternatively, as shown in fig. 7, the second electrode 14 extends along the direction of the scan line 1 and the data line 2 and corresponds to the first black matrix stripe 111 and the second black matrix stripe 112, and the second electrode 14 covers the first black matrix stripe 111 and the second black matrix stripe 112 at the same time, but not limited thereto.
The width of the second electrode 14 is greater than the width of the black matrix stripe 11. In this embodiment, the width of the second electrode 14 is greater than the width of the first black matrix stripe 111 and completely covers the first black matrix stripe 111, the width of the side edge of the second electrode 14 exceeding the first black matrix stripe 111 is d, and the value range of d is 0-30 μm. Of course, in other embodiments, the width of the side of the second electrode 14 beyond the second black matrix stripe 112 is also d, and d ranges from 0 μm to 30 μm.
The color film substrate 10 and the array substrate 20 may be made of glass, acrylic acid, polycarbonate, and other materials. The material of the common electrode 21, the pixel electrode 23, the first electrode 12, and the second electrode 14 may be Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or the like.
As shown in fig. 4, in the wide viewing angle mode, the dc common voltage Vcom is applied to the common electrode 21, and no voltage is applied to the first electrode 12 and the second electrode 14, so that the voltage difference between the first electrode 12, the second electrode 14 and the common electrode 21 is zero or less than the preset value. The pixel electrode 23 applies corresponding gray scale voltage, a voltage difference is formed between the pixel electrode 23 and the common electrode 21 and a horizontal electric field is generated, so that the positive liquid crystal molecules deflect in the horizontal direction towards the direction parallel to the horizontal electric field, the gray scale voltage comprises 0-255 gray scale voltage, and when different gray scale voltages are applied to the pixel electrode 23, the pixel unit P presents different brightness, thereby displaying different pictures and realizing the normal display of the display panel under a wide viewing angle.
As shown in fig. 5, in the narrow viewing angle mode, a voltage having a larger amplitude than the common voltage Vcom on the common electrode 21 is applied to the first electrode 12 and the second electrode 14, so that the voltage difference between the first electrode 12, the second electrode 14 and the common electrode 21 is larger than a predetermined value (for example, 5V), a vertical electric field is formed between the color film substrate 10 and the array substrate 20, the positive liquid crystal molecules are greatly deflected in the vertical direction, large-angle viewing light leakage occurs in the display panel, the contrast is reduced in the oblique viewing direction, the viewing angle is narrowed, and the display panel finally realizes narrow viewing angle display. The pixel electrode 23 applies corresponding gray scale voltage, a voltage difference is formed between the pixel electrode 23 and the common electrode 21 and a horizontal electric field is generated, so that the positive liquid crystal molecules deflect in the horizontal direction towards the direction parallel to the horizontal electric field, the gray scale voltage comprises 0-255 gray scale voltage, and when different gray scale voltages are applied to the pixel electrode 23, the pixel unit P presents different brightness, thereby displaying different pictures and realizing the normal display of the display panel under a narrow viewing angle.
The following table is a simulation table of the present invention and the prior art, as shown in the following table:
as can be known from the above table, for prior art, the utility model, improved 9.4% on wide visual angle Tr (transmissivity), narrow visual angle Tr has promoted 9.6%, and wide visual angle CR (contrast) has promoted 8.6%, and narrow visual angle CR has promoted 19.5%, and the visual angle scope at narrow visual angle is 0-30, just begins to have the grey scale reversal when 70. The utility model discloses a set up first electrode 12 and second electrode 14, second electrode 14 more leans on to liquid crystal layer 30 than first electrode 12, and the electric field that second electrode 14 and common electrode 21 formed is greater than the electric field that first electrode 12 and common electrode 21 formed promptly, has the effect of promotion contrast and penetrability.
The utility model also provides a display device, include as above the changeable display panel of visual angle.
Fig. 8 and 9 are schematic plan views of a display device according to an embodiment of the present invention, please refer to fig. 8 and 9, the display device is provided with a viewing angle switching key 40 for a user to send a viewing angle switching request to the display device. The view switching key 40 may be a physical key (as shown in fig. 8), or may be a software control or application program (APP) to implement a switching function (as shown in fig. 9, a wide view and a narrow view are set by a slider). When a user needs to switch between a wide viewing angle and a narrow viewing angle, a viewing angle switching request can be sent to the display device by operating the viewing angle switching key 40, and finally, the driving chip 50 controls the voltage applied to the first electrode 12 and the second electrode 14, when the voltage difference between the first electrode 12 and the second electrode 14 and the common electrode 31 is different, the display device can realize the switching between the wide viewing angle and the narrow viewing angle, when the display device is switched to the wide viewing angle, the driving method corresponding to the wide viewing angle mode is adopted, and when the display device is switched to the narrow viewing angle, the driving method corresponding to the narrow viewing angle mode is adopted, so that the display device has stronger operation flexibility and convenience, and the multifunctional display device integrating entertainment video and privacy confidentiality is achieved.
In this document, the terms upper, lower, left, right, front, rear and the like are used for defining the positions of the structures in the drawings and the positions of the structures relative to each other, and are only used for the clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims. It is also to be understood that the terms "first" and "second," etc., are used herein for descriptive purposes only and are not to be construed as limiting in number or order.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description in any form, and although the present invention has been disclosed with the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make some changes or modifications within the technical scope of the present invention without departing from the technical scope of the present invention, and the technical contents of the above disclosure can be utilized to make equivalent embodiments, but the technical contents of the present invention are not broken away from, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention all still belong to the protection scope of the technical solution of the present invention.
Claims (10)
1. A display panel with switchable visual angles comprises a color film substrate (10), an array substrate (20) arranged opposite to the color film substrate (10) and a liquid crystal layer (30) arranged between the color film substrate (10) and the array substrate (20), wherein a plurality of pixel units (P) are formed on the array substrate (20) by mutually insulating and intersecting a plurality of scanning lines (1) and a plurality of data lines (2), each pixel unit (P) is internally provided with a pixel electrode (23) and a thin film transistor (3), the pixel electrode (23) is electrically connected with the scanning lines (1) and the data lines (2) adjacent to the thin film transistors (3) through the thin film transistors (3), the color film substrate (10) is provided with a plurality of black matrix strips (11) which are transversely and longitudinally intersected, the plurality of black matrix strips (11) comprise first black matrix strips (111) corresponding to the plurality of scanning lines (1) and second black matrix strips (112) corresponding to the plurality of data lines (2), the color filter substrate (10) is provided with a color resist layer (13) in an area corresponding to the plurality of pixel units (P), and is characterized in that the color filter substrate (10) is further provided with a first electrode (12) and a second electrode (14) which are insulated from each other, the first electrode (12) and the second electrode (14) are used for controlling visual angle switching, the black matrix strip (11), the color resist layer (13), the first electrode (12) and the second electrode (14) are located on the same side of the color filter substrate (10), the second electrode (14) is closer to the liquid crystal layer (30) than the first electrode (12), the first electrode (12) is of a full-surface structure, and the second electrode (14) is of a patterned structure covering the first black matrix strip (111) or/and the second black matrix strip (112).
2. A switchable viewing angle display panel according to claim 1, wherein the width of the second electrode (14) is larger than the width of the black matrix stripe (11).
3. A display panel with switchable viewing angles according to claim 1, wherein the side of the second electrode (14) exceeds the width of the black matrix stripe (11) by a distance d, and the distance d is in the range of 0-30 μm.
4. A switchable viewing angle display panel according to claim 1, wherein the second electrode (14) extends along the direction of the scan line (1) and covers the first black matrix stripe (111).
5. A switchable viewing angle display panel according to claim 1, wherein the second electrode (14) extends along the data line (2) and covers the second black matrix stripe (112).
6. A switchable viewing angle display panel according to claim 1, wherein the second electrode (14) extends along the scanning lines (1) and the data lines (2) and covers the first black matrix strips (111) and the second black matrix strips (112) simultaneously.
7. A switchable viewing angle display panel according to claim 1, wherein the first electrode (12) and the second electrode (14) are electrically connected and apply the same electrical signal.
8. A display panel with switchable viewing angles according to claim 1, wherein the first electrode (12) is located between the black matrix stripe (11) and the color resistance layer (13), and the second electrode (14) is located on the color resistance layer (13).
9. A switchable viewing angle display panel according to claim 1, wherein the array substrate (20) is further provided with a common electrode (21), and the common electrode (21) and the pixel electrode (23) are located in different layers and are insulated from each other.
10. A display device comprising the viewing-angle switchable display panel according to any one of claims 1 to 9.
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| CN201921464988.1U CN210465919U (en) | 2019-09-04 | 2019-09-04 | Display panel with switchable viewing angles and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023216144A1 (en) * | 2022-05-11 | 2023-11-16 | 京东方科技集团股份有限公司 | Display panel and display apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023216144A1 (en) * | 2022-05-11 | 2023-11-16 | 京东方科技集团股份有限公司 | Display panel and display apparatus |
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