TWI447496B - Display panel - Google Patents

Description

Display panel

The present invention relates to a display panel.

In general, in order to provide a picture to a plurality of viewers, the display usually has a wide viewing angle, but at certain times or occasions, such as reading confidential information or entering a password, the wide viewing angle is easy to display. Make confidential information peeped by others and cause confidential information to leak. Therefore, in order to meet the different needs of providing confidential information to a plurality of viewers and in public, an adjustable viewing angle display having a switchable wide viewing angle display mode and a narrow viewing angle display mode has gradually become one of the mainstream products in the display market.

The anti-spying mechanism of the existing display can be roughly divided into the following technologies:

First, install the anti-spy film directly on the display surface:

Generally, the anti-spy film mainly suppresses the brightness of the large viewing angle, so that the side view viewer cannot read the displayed message clearly, and the privacy protection effect is achieved. Although the method is simple and the material is easy to obtain, because it is an extra optical film, it will affect the optical characteristics and display quality of the display when it is originally viewed, and also need to manually switch the anti-peep or not, resulting in the user's use. inconvenient.

Second, backlight control:

A backlight with a high degree of collimation of the originally emitted light, combined with a voltage-controlled diffusion sheet, such as a polymer-dispersed liquid crystal film, can diffuse the collimated light by a voltage-controlled diffusion sheet when the voltage is turned off, resulting in side view A light source is emitted to provide a wide viewing angle display mode; the voltage controlled diffuser does not diffuse the original collimated light when the voltage is turned on to achieve a narrow viewing angle display mode. Ideally, it can perfectly avoid other people's peeping information, and the switching is convenient. However, in practice, because the optical path control is not easy, it is impossible to achieve complete collimated light. Although the distribution of the backlight at a large viewing angle can be reduced, the brightness of the large viewing angle cannot be completely reduced to the unrecognizable, so that a satisfactory effect cannot be obtained in the anti-peep performance.

Third, plus the perspective control module:

On the display module (panel) that is normally displayed, another viewing angle control module (panel) is added, and the wide viewing angle display mode and the narrow viewing angle display mode are switched through the switch of the voltage control angle control module. This method does not cause any interference or damage to the original image display in the wide viewing angle display mode, and can preserve the quality of the original image. In the narrow viewing angle display mode, the brightness of the side view is significantly suppressed, making it difficult for the side view person to interpret the message displayed by the image. However, because it consists of two modules, the overall weight and thickness are doubled, and the relative cost is also greatly increased.

It can be seen that the anti-spying technology of the existing display often needs to sacrifice some of the original characteristics, such as display quality, optical characteristics, thickness and weight, while achieving the anti-spying effect, so the existing anti-spy technology still has room for improvement.

In order to solve the problem of the prior art, a technical aspect of the present invention is a display panel, which mainly improves the anti-spying effect of the side view angle of the display panel through a special driving method and a pixel design. In the wide viewing angle display mode, the first sub-pixel and the second sub-pixel of the pixel are driven by a set of relative driving voltages to have a wide viewing angle property; in the narrow viewing angle display mode, the panel is at least divided into a first display area and a second display area, wherein the first display area is driven by a front view brightness ratio, for example, the first sub-pixel and the second sub-pixel adopt 10:0 (the front view of the first sub-pixel 110) Brightness: the front view brightness of the second sub-pixel 120 is proportional to the brightness ratio), and the second display area is driven by another front view brightness ratio, for example, the first sub-pixel and the second sub-pixel are 8:2. (The front view brightness of the first sub-pixel 110: the front view brightness ratio of the front view brightness of the second sub-pixel 120). In this driving mode, the first main pixel element of the first sub-pixel can be further designed to be shielded by an opaque connecting line, or designed to be connected to the first main pixel of the first sub-pixel. The plurality of first branch pixel electrodes are dislocated so that they are significantly contrasted with the second sub-pixel without the shading or misalignment design, thereby increasing the brightness of different display areas in side view, and effectively improving the display. The anti-spy effect of the side view of the panel.

According to an embodiment of the invention, the display panel comprises at least one first display area and at least one second display area. The first display area and the second display area respectively have a plurality of pixels. Each pixel contains a first sub-pixel and a second sub-pixel. The first sub-pixel includes a first active element, a first trunk pixel electrode, and a plurality of first branch pixel electrodes. The first trunk pixel electrode is electrically connected to the first active component. The first branch pixel electrode is electrically connected to the first trunk pixel electrode. The first branch pixel electrode is misaligned on both sides of the first trunk pixel electrode, and defines a plurality of alignment fields with different directions. The second sub-pixel is adjacent to the first sub-pixel and includes a second active element, a second trunk pixel electrode, and a plurality of second branch pixel electrodes. The second trunk pixel electrode is electrically connected to the second active component. The second branch pixel electrode is electrically connected to the second trunk pixel electrode. The second branch pixel electrode defines a plurality of alignment fields with different directions. When the display panel is in the narrow viewing angle display mode and the first display area and the second display area respectively display a front view brightness, the driving voltage of the first sub-pixel in the first display area is substantially larger than the second display area a sub-pixel and a driving voltage of the first sub-pixel and the second sub-pixel in the second display area, and a driving voltage of the second sub-pixel in the first display area is substantially smaller than a first driving area a sub-pixel and a driving voltage of the first sub-pixel and the second sub-pixel in the second display area.

In an embodiment of the invention, the first trunk pixel electrode includes an opaque conductive layer.

In an embodiment of the invention, the second trunk pixel electrode includes another opaque conductive layer.

In an embodiment of the invention, the second sub-pixel further includes a second opaque connecting line. The second opaque connecting line is at least partially overlapped under the second trunk pixel and electrically connected to the second active element and the second trunk pixel.

In an embodiment of the invention, the second active component comprises a drain. The second opaque connecting line is connected to the drain, and the second opaque connecting line and the drain are composed of the same metal layer.

In an embodiment of the invention, the second branched pixel electrode is misaligned on both sides of the second trunk pixel.

In an embodiment of the invention, the first sub-pixel further includes a first opaque connecting line. The first opaque connecting line is at least partially overlapped under the first trunk pixel and electrically connected to the first active element and the first trunk pixel.

In an embodiment of the invention, the first active component comprises a drain. The first opaque connecting line is connected to the drain, and the first opaque connecting line and the drain are composed of the same metal layer.

In an embodiment of the invention, the first trunk pixel electrode includes a first trunk portion and a second trunk portion that are electrically connected to each other and are alternately arranged. The second trunk divides the first sub-pixel into a first alignment area and a second alignment area that are not equal in area.

In an embodiment of the invention, the first branching pixel electrode is misaligned with at least one of the first trunk portion and the second trunk portion, and forms an acute angle.

In an embodiment of the invention, the area ratio of the first alignment area to the second alignment area of each of the first sub-pixels is substantially greater than or equal to 5.

In an embodiment of the invention, the second trunk pixel electrode includes a third trunk portion and a fourth trunk portion that are electrically connected to each other and are alternately arranged. The fourth trunk unit divides the second sub-pixel into a third alignment area and an fourth alignment area that are not equal in area.

In an embodiment of the invention, the area ratio of the third alignment region to the fourth alignment region of each of the second sub-pixels is substantially greater than or equal to 5.

In an embodiment of the invention, the second branched pixel electrodes are symmetrically disposed on both sides of the second trunk pixel.

In an embodiment of the invention, the first sub-pixel of each pixel and the second sub-pixel are arranged in a vertical direction, and the first sub-pixel of each pixel is at a level. The direction is a staggered arrangement of the second sub-pixels of adjacent pixels.

According to another embodiment of the present invention, the display panel includes at least one first display area and at least one second display area. The first display area and the second display area respectively have a plurality of pixels. Each pixel contains a first sub-pixel and a second sub-pixel. The first sub-pixel includes a first active component, a first opaque connection line, and a plurality of first branch pixel electrodes. The first opaque connecting line is electrically connected to the first active component. The first branch pixel electrode is electrically connected to the first opaque connecting line. The first branch pixel electrode defines a plurality of alignment fields that are different in direction. The second sub-pixel is adjacent to the first sub-pixel and includes a second active element, a second trunk pixel electrode, and a plurality of second branch pixel electrodes. The second trunk pixel electrode is electrically connected to the second active component. The second branch pixel electrode is electrically connected to the second trunk pixel electrode. The second branch pixel electrode defines a plurality of alignment fields with different directions. When the display panel is in the narrow viewing angle display mode and the first display area and the second display area respectively display a front view brightness, the driving voltage of the first sub-pixel in the first display area is substantially larger than the second display area a sub-pixel and a driving voltage of the first sub-pixel and the second sub-pixel in the second display area, and a driving voltage of the second sub-pixel in the first display area is substantially smaller than a first driving area a sub-pixel and a driving voltage of the first sub-pixel and the second sub-pixel in the second display area.

In an embodiment of the invention, the first sub-pixel further includes a first trunk pixel electrode. The first trunk pixel electrode is disposed to overlap with the first opaque connecting line, and electrically connects the first active component and the first branching pixel electrode.

The embodiments of the present invention are disclosed in the following drawings, and for the purpose of clarity However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic representation.

First embodiment

FIG. 1 is a schematic view showing a display panel according to a first embodiment of the present invention in a wide viewing angle display mode. FIG. 2 is a schematic view showing the display panel of FIG. 1 in a narrow viewing angle display mode. As shown in FIG. 1, the display panel of the present embodiment includes a first display area D1 (ie, an upper right display area and a lower left display area of FIG. 1) and a second display area D2 (ie, the upper left of the first figure). Display area and lower right display area). The first display area D1 and the second display area D2 respectively have a plurality of pixels 100. Each pixel 100 includes a first sub-pixel 110 and a second sub-pixel 120. The second sub-pixel 120 is adjacent to the first sub-pixel 110. Of course, in practical applications, the layout of the first display area D1 and the second display area D2 of the display panel is not limited to those shown in FIG. 1 and FIG. 2 .

Fig. 3 is a plan view showing the pixel 100 of Fig. 1. As shown in FIG. 3, the first sub-pixel 110 includes a first active device 111, a first trunk pixel 112, and a plurality of first branch pixel electrodes 113. The first trunk pixel 112 is electrically connected to the first active component 111. The first branch pixel electrode 113 is electrically connected to the first trunk pixel 112 and is disposed on both sides of the first trunk pixel 112, that is, the first branch pixel electrode 113 is not mirror-symmetrically disposed on the first The main pixels are on both sides of the electrode 112. Further, the first branch pixel electrode 113 defines a plurality of alignment fields having different directions.

In contrast, the second sub-pixel 120 may also include a second active component 121, a second trunk pixel electrode 122, and a plurality of second branch pixel electrodes 123. The second trunk pixel electrode 122 is electrically connected to the second active component 121. The second branch pixel electrode 123 is electrically connected to the second trunk pixel electrode 122. The second branch pixel electrode 123 also defines a plurality of alignment domains having different directions. However, the second branch pixel electrodes 123 of the present embodiment are symmetrically disposed on both sides of the second trunk pixel 122.

At the same driving voltage, the first branched pixel electrode 113 is disposed on both sides of the first trunk pixel 112 due to the misalignment, so that the distribution of the liquid crystal molecules is relatively uniform and concentrated toward the first trunk pixel 112. Therefore, the amount of light leakage of the first sub-pixel 110 in the side view is low, and the brightness is also lowered. In contrast, since the second branched pixel electrode 123 is disposed on both sides of the second trunk pixel 122 without being misaligned, the distribution of the liquid crystal molecules near the second trunk pixel 122 is relatively scattered, so that the side view is The second sub-pixel 120 has a higher light leakage amount and a higher brightness. In short, if the first sub-pixel 110 and the second sub-pixel 120 are driven by the same driving voltage, the side view brightness of the first sub-pixel 110 is lower than the side view brightness of the second sub-pixel 120.

Returning to FIG. 1 , when the display panel is in the wide viewing angle display mode, the first sub-pixel 110 and the second sub-pixel 120 of each pixel 100 in the first display area D1 and the second display area D2 will be The same driving voltage is driven such that the first sub-pixel 110 of each pixel 100 and the second sub-pixel 120 have substantially the same frontal brightness.

Returning to FIG. 2, when the display panel is in the narrow viewing angle display mode and the first display area D1 and the second display area D2 respectively display a front view brightness, the driving voltage of the first sub-pixel 110 in the first display area D1 is substantially The driving voltage of the first sub-pixel 110 and the second sub-pixel 120 in the second sub-pixel 120 and the second display area D2 in the first display area D1 is greater than the second, and the second in the first display area D1 The driving voltage of the sub-pixel 120 is substantially smaller than the driving voltages of the first sub-pixel 110 and the second sub-pixel 120 in the first sub-pixel 110 and the second display area D2 in the first display area D1.

As shown in FIG. 2, when the display panel is in the narrow viewing angle display mode, the front sub-pixel 110 in the first display area D1 has the brightest front view brightness (indicated by all white), and the first display area D1 The front view brightness of the second sub-pixel 120 is the darkest (indicated by all black), and the front sub-pixel 110 and the second sub-pixel 120 in the second display area D2 are the brightest and most Between the dark. In addition, in this embodiment, the driving voltage of the first sub-pixel 110 in the second display area D2 may be substantially larger than the driving voltage of the second sub-pixel 120 in the second display area D2, so that the second display area The front view brightness of the first sub-pixel 110 in D2 is substantially greater than the front view brightness of the second sub-pixel 120 in the second display area D2. In other words, when the display panel is in the narrow viewing angle display mode, although the second sub-pixel 120 in the first display area D1 will have the smallest front view brightness, since the first sub-pixel 110 in the first display area D1 will have The maximum front view brightness, so that the overall front view brightness of the first display area D1 is substantially the same as the overall front view brightness of the second display area D2, without affecting the image when the display panel is facing up.

In practice, when the display panel is in the narrow viewing angle display mode, the ratio of the front view brightness of the first sub-pixel 110 and the second sub-pixel 120 in the first display area D1 may be 10:0 (the first sub-pixel The front view brightness of the first sub-pixel 120 in the second display area D2 and the front view brightness ratio of the second sub-pixel 120 may be 8:2 (first The front view brightness of the sub-pixel 110: the front view brightness of the second sub-pixel 120), but not limited thereto, may be adjusted by the general knowledge in the technical field of the present invention.

In the side view, for the first display area D1, the first sub-pixel 110 has a misalignment relationship of the first sub-pixels 113, so the side view brightness of the first sub-pixel 110 is decreased, and Since the second sub-pixel 120 has a low driving voltage, the side view brightness is also relatively low, and the overall side view brightness of the first display area D1 is combined to be dark. In contrast, for the second display area D2, although the first sub-pixel element 113 of the first sub-pixel 110 has a misplaced design, since the second sub-pixel element 123 of the second sub-pixel 120 does not have The design of the misalignment setting, so that the second sub-pixel 120 can still provide sufficient side view brightness, so that the overall side view brightness of the second display area D2 is bright. Once the contrast between the overall side view brightness of the first display area D1 and the overall side view brightness of the second display area D2 is expanded, the first display area D1 and the second display area D2 form a contrast pattern of bright and dark contrast in side view. The display panel has an anti-peep effect.

In addition, as shown in FIG. 2, in the present embodiment, the first sub-pixel 110 and the second sub-pixel 120 of each pixel 100 in the first display area D1 and the second display area D2 are perpendicular to each other. Direction V is arranged. Moreover, the first sub-pixel 110 of each pixel 100 is interlaced with the second sub-pixel 120 of the adjacent pixel 100 in the horizontal direction H. That is, the arrangement order of the first sub-pixels 110 and the second sub-pixels 120 of any two adjacent pixels 100 in the horizontal direction H is reversed, but not limited thereto. The design of the embodiment is to avoid that when the display panel is in the narrow viewing angle display mode, the second sub-pixel 120 whose brightness is dark is arranged in a line in the horizontal direction H, so that the user feels that the display panel has a dark line when facing the front view. presence.

Figure 11 is a cross-sectional view along line III of Figure 3. As shown in FIGS. 3 and 11, the first sub-pixel 110 further includes a first opaque connection line 115 in addition to the design of the first branch pixel electrode 113 having a misalignment. The first opaque connecting line 115 is disposed at least partially under the first trunk pixel 112 and electrically connected to the first active element 111 and the first trunk pixel 112. This design is because the distribution of liquid crystal molecules in the vicinity of the first trunk pixel 112 is relatively uneven, so that the first sub-pixel 110 is easy to leak light in side view, and the design of the first opaque connecting line 115 can shield this portion. The light leakage causes the side view brightness of the first sub-pixel 110 to be further lowered to expand the contrast between the first display area D1 and the second display area D2 in the side view.

Fig. 12 is a cross-sectional view showing a first sub-pixel 110 according to another variation of the present invention, the cross-sectional position of which is the same as that of Fig. 11. The first sub-pixel 110 may include an opaque conductive layer 112c in addition to the first branch pixel electrode 113 having a misaligned design. Similarly, this design can shield the light leakage generated in the side view due to the relatively uneven distribution of the liquid crystal molecules in the vicinity of the first main pixel electrode 112, and further reduce the side view brightness of the first sub-pixel 110. To increase the contrast between the first display area D1 and the second display area D2 in the side view.

Figure 4 is a cross-sectional view along line I and line II of Figure 3. In Fig. 4, the I-I region shows the section along the line I of Fig. 3, and the II-II area shows the section along the line II of Fig. 3. As shown in FIG. 4, the first active device 111 may include a gate 111a, a gate dielectric layer 111b, a channel region 111c, a source ohmic contact layer 111d, a drain ohmic contact layer 111e, a source electrode 111f, and a drain electrode 111g. The gate 111a is located on the substrate 101 and electrically connected to the scan line 104 (shown in FIG. 3). The gate dielectric layer 111b covers the gate 111a. The channel region 111c is located on the gate dielectric layer 111b and above the gate 111a. The source ohmic contact layer 111d and the drain ohmic contact layer 111e are respectively located on both sides of the channel region 111c. The source 111f and the drain 111g are respectively located on the source ohmic contact layer 111d and the drain ohmic contact layer 111e, and the source 111f is electrically connected to the data line 102 (shown in FIG. 3).

In FIG. 4, the first sub-pixel 110 may further include a first capacitor 114. The first capacitor 114 includes a lower electrode 114a, a dielectric layer 114b, and an upper electrode 114c. The lower electrode 114a is located on the substrate 101 and electrically connected to the common potential line 106 (shown in FIG. 3). The dielectric layer 114b covers the lower electrode 114a. The upper electrode 114c is located on the dielectric layer 114b.

In addition, the first sub-pixel 110 may further include a protective layer 116 covering the first active device 111 and the first capacitor 114, and the first trunk pixel 112 and the first branch pixel electrode. 113 (shown in Figure 3) are all located on the protective layer 116. The protective layer 116 of FIG. 4 has a through hole 116a, and the through hole 116a exposes the upper electrode 114c, so that the first trunk pixel electrode 112 and/or the first branch pixel electrode 113 (shown in FIG. 3) pass through. The hole 116a is electrically connected to the first active element 111.

As can be seen from FIG. 4, the first opaque connecting line 115 can be electrically connected to the drain 111g and the upper electrode 114c, and further to the first trunk pixel 112 and/or the first branch pixel electrode 113. Electrical connection. In practice, the first opaque connecting line 115 described above may be formed of the same metal layer as the drain 111g and/or the upper electrode 114c.

Returning to FIG. 3, in the present embodiment, the first trunk pixel electrode 112 of the first sub-pixel 110 includes a first trunk portion 112a and a second trunk portion 112b that are electrically connected to each other and are alternately arranged. The first trunk portion 112a of the first trunk pixel 112 is vertically disposed, and the second trunk portion 112b is horizontally disposed. The second trunk portion 112b of the first trunk pixel 112 divides the first sub-pixel 110 into a first alignment region F1 having an unequal area (that is, a lower portion of the first sub-pixel 110) and a second alignment region F2. (ie, the upper portion of the first sub-pixel 110). Moreover, the area ratio of the first alignment area F1 and the second alignment area F2 of each first sub-pixel 110 is substantially greater than or equal to 5, and is not limited thereto, and is generally known in the technical field of the present invention. It can also be adjusted according to actual conditions.

In addition, the first branch pixel electrode 113 may be misaligned with at least one of the first trunk portion 112a and the second trunk portion 112b, and form an acute angle. That is, although the first sub-pixel element 113 of the first sub-pixel 110 is shown as being misaligned on both sides of the first trunk portion 112a and symmetrically disposed on both sides of the second trunk portion 112b, But it is not limited to this. In a practical application, the first sub-pixel electrodes 113 of the first sub-pixel 110 may also be dislocated on both sides of the second trunk portion 112b, but symmetrically disposed on both sides of the first trunk portion 112a. Alternatively, the first sub-pixel electrodes 113 of the first sub-pixel 110 may be misaligned at both sides of the first trunk portion 112a and the second trunk portion 112b.

In addition, although FIG. 3 illustrates the first opaque connecting line 115 as being at least partially overlapped under the first trunk portion 112a of the first trunk pixel 112, this does not limit the present invention, and actually the first opaque connection The line 115 may be disposed to overlap under the first trunk portion 112b of the first trunk pixel 112 at least partially overlapping, at least partially overlapping the first trunk portion 112b of the first trunk pixel 112. Those of ordinary skill in the art should be embodiments that actually require the flexibility to select the first opaque connection line 115.

Also shown in FIG. 3, in the present embodiment, the second trunk pixel electrode 122 of the second sub-pixel 120 includes a third trunk portion 122a and a fourth trunk portion 122b that are electrically connected to each other and are alternately arranged. The fourth trunk portion 122b of the second trunk pixel electrode 122 divides the second sub-pixel 120 into a third alignment region S1 having an unequal area (that is, an upper portion of the second sub-pixel 120) and a fourth alignment region S2. (ie, the lower portion of the second sub-pixel 120). Moreover, the area ratio of the third alignment area S1 and the fourth alignment area S2 of each second sub-pixel 120 is substantially greater than or equal to 5, which is not limited thereto, and is generally known in the technical field of the present invention. It can also be adjusted according to actual conditions.

Further, in the present embodiment, the second sub-pixel electrodes 123 of the second sub-pixel 120 are symmetrically disposed on both sides of the third trunk portion 122a and the fourth trunk portion 122b of the second trunk pixel electrode 122. That is, the second sub-pixel element 123 of the present embodiment is not designed to be misaligned.

In this embodiment, the display panel may be a Polymer-Stabilized Alignment (PSA) display panel, but the display panel is not limited thereto. Actually, the display panel may be a Vertical Alignment (VA) display panel or an ultraviolet ray. An Ultraviolet Induced Multi-Domain Vertical Alignment (UV2A) display panel...etc.

Second embodiment

Figure 5 is a plan view of a pixel 100 in accordance with a second embodiment of the present invention. The difference between this embodiment and the first embodiment is that in the present embodiment, only the first sub-pixel element 113 of the first sub-pixel 110 has a design in which the dislocation is set.

Other related structures, driving methods, and operation details are the same as those of the first embodiment, and thus the description thereof will not be repeated.

Third embodiment

Figure 6 is a plan view of a pixel 100 in accordance with a third embodiment of the present invention. The difference between the present embodiment and the first embodiment is that, in the present embodiment, the first sub-pixel electrodes 113 of the first sub-pixel 110 are symmetrically disposed on both sides of the first trunk pixel 112. That is, the first sub-pixel electrodes 113 of the present embodiment are not provided with a dislocation setting, and only the first opaque connection line 115 is disposed at least partially under the first main-pixel element 112.

Other related structures, driving methods, and operation details are the same as those of the first embodiment, and thus the description thereof will not be repeated.

Fourth embodiment

Figure 7 is a plan view of a pixel 100 in accordance with a fourth embodiment of the present invention. The difference between this embodiment and the first embodiment is that in the present embodiment, the second sub-pixel 120 also includes a second opaque connection line 125. The second opaque connecting line 125 is at least partially disposed under the second trunk pixel 122 and electrically connected to the second active element 121 and the second trunk pixel 122.

More specifically, the second active element 121 described above has a drain 121g. The second opaque connecting line 125 is connected to the drain 121g of the second active component 121, and the second opaque connecting line 125 and the drain 121g of the second active component 121 can be formed by the same metal layer.

In addition, the second sub-pixel 120 described above also has a second capacitor 124, and the second capacitor 124 also has an upper electrode 124c. The second trunk pixel electrode 122 can be connected to the upper electrode 124c of the second capacitor 124 through the through hole 126a. In addition, the second opaque connecting line 125 may be formed of the same metal layer as the upper electrode 124c of the second capacitor 124.

The arrangement of the second opaque connecting line 125 can also reduce the side view brightness of the second sub-pixel 120, but the first sub-pixel 110 has the first branching pixel electrode 113 and the first opaque connecting line. 115. Therefore, if the first sub-pixel 110 and the second sub-pixel 120 are driven by the same driving voltage, the side view brightness of the second sub-pixel 120 is still brighter than the side view brightness of the first sub-pixel 110. In this way, when the display panel is in the narrow viewing angle display mode, the second sub-pixel 120 in the second display area D2 can still provide sufficient side view brightness, so that the overall side view brightness of the second display area D2 is maintained at a certain level. Level to maintain the contrast between the first display area D1 and the second display area D2

In addition, although FIG. 7 illustrates the second opaque connecting line 125 as being at least partially overlapped under the third trunk portion 122a of the second trunk pixel electrode 122, this does not limit the present invention, and actually the second opaque connection The line 125 may be disposed to be disposed under the third trunk portion 122a of the second trunk pixel 122 in a partially overlapping manner, and may extend to at least partially overlap the fourth trunk portion 122b of the second trunk pixel electrode 122. Those of ordinary skill in the art should be embodiments that actually require the flexibility to select the second opaque connection line 125.

In addition, although FIG. 7 reduces the side view brightness of the second sub-pixel 120 with the second opaque connecting line 125, this does not limit the present invention. In another variant embodiment of the invention, the second trunk pixel electrode may also comprise an opaque conductive layer and thereby reduce the side view brightness of the second sub-pixel. The structure of the opaque conductive layer is the same as that of the embodiment shown in FIG. 12, and only the position is located in the second sub-pixel, and thus the description thereof will not be repeated.

Other related structures, driving methods, and operation details are the same as those of the first embodiment, and thus the description thereof will not be repeated.

Fifth embodiment

Figure 8 is a plan view of a pixel 100 in accordance with a fourth embodiment of the present invention. The difference between the present embodiment and the first embodiment is that, in the present embodiment, the second branched pixel electrodes 123 are misaligned on both sides of the second trunk pixel electrode 122.

The second branch pixel electrode 123 of the misalignment arrangement can also reduce the side view brightness of the second sub-pixel 120, but the first sub-pixel 110 has the first branch pixel electrode 113 and the first An opaque connection line 115, so if the first sub-pixel 110 and the second sub-pixel 120 are driven by the same driving voltage, the side view brightness of the second sub-pixel 120 is still higher than that of the first sub-pixel 110. The brightness is bright. In this way, when the display panel is in the narrow viewing angle display mode, the second sub-pixel 120 in the second display area D2 can still provide sufficient side view brightness, so that the overall side view brightness of the second display area D2 is maintained at a certain level. The level of light to maintain the contrast between the first display area D1 and the second display area D2.

In addition, although the second sub-pixel 120 of the second sub-pixel 120 is shown as being misaligned on both sides of the third trunk portion 122a and symmetrically disposed on both sides of the fourth trunk portion 122b, Not limited to this. In a practical application, the second sub-pixel electrodes 123 of the second sub-pixel 120 may also be dislocated on both sides of the fourth trunk portion 122b, but symmetrically disposed on both sides of the third trunk portion 122a. Alternatively, the second sub-pixel electrodes 123 of the second sub-pixel 120 may be disposed at the same time on both sides of the third trunk portion 122a and the fourth trunk portion 122b.

Other related structures, driving methods, and operation details are the same as those of the first embodiment, and thus the description thereof will not be repeated.

Example

Hereinafter, a plurality of embodiments of the present invention will be disclosed, thereby explaining that the branched pixel electrodes and the opaque connecting lines of the dislocations of the above embodiments can surely reduce the side view luminance of the sub-pixels. It should be understood that in the following description, the parameters that have been mentioned in the above embodiments will not be repeated, and will be supplemented only if further definitions are needed.

The luminance/grayscale value curves of the sub-pixels of the respective examples under the same conditions will be compared below, and the results are shown in Fig. 9. In Fig. 9, the horizontal axis is the grayscale value, and the vertical axis is the luminance value normalized by the maximum brightness of the front view. Curve A is the luminance/grayscale value curve normalized by Gamma 2.2 with the maximum brightness. Curve B is a luminance/grayscale value curve on the side view angle (azimuth angle of 60 degrees) for the sub-pixels of the branch pixel electrodes that are not misaligned and do not contain opaque connection lines. Curve C is a luminance/grayscale value curve on a side view (azimuth angle of 60 degrees) for a sub-pixel with an opaque connection line but no branching of the bifurcated pixel. The curve D is a luminance/grayscale value curve with a opaque connecting line and a sub-pixel of the branching pixel electrode also having a misalignment setting at a side viewing angle (azimuth angle of 60 degrees). As can be seen from Fig. 9, the side view brightness indicated by curve C and curve D is indeed lower than the side view brightness indicated by curve A. This result shows that the bifurcated pixel electrode and the opaque connecting line which are dislocated in the above embodiment can surely reduce the side view luminance of the sub-pixel.

The contrast ratio/grayscale value curves of the display panels of the respective embodiments under the same conditions will be compared below, and the results are shown in FIG. In Fig. 10, the horizontal axis is the grayscale value, and the vertical axis is the contrast ratio (CR) of the second display region and the first display region at the side viewing angle (azimuth angle of 60 degrees). The curve E represents that neither the first sub-pixel nor the second sub-pixel has an opaque connection line, and the branch pixel electrode also has no contrast ratio/gray scale value curve of the display panel which is misaligned. The curve F represents that the first sub-pixel has an opaque connecting line, and the branching pixel electrode also has a contrast ratio/grayscale value curve of the display panel which is misaligned. In the above embodiments, the optical retardation (Δnd) of the liquid crystal used in the display panel is 350 nm.

As can be seen from Fig. 10, the contrast ratio represented by the curve F is indeed higher than the contrast ratio represented by the curve E. Specifically, the average contrast comparison curve E of the curve F full gray scale value is increased by about 6.28%. This result shows that the branched pixel electrodes and the opaque connecting lines of the above-described embodiment of the misalignment can surely improve the anti-spying capability of the display panel.

While the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and the invention may be modified and modified in various ways without departing from the spirit and scope of the invention. The scope is subject to the definition of the scope of the patent application.

100. . . Pixel

101. . . Substrate

102. . . Data line

104. . . Scanning line

106. . . Common potential line

110. . . First subpixel

111. . . First active component

111a. . . Gate

111b. . . Gate dielectric layer

111c. . . Channel area

111d. . . Source ohmic contact layer

111e. . . Bungee ohmic contact layer

111f. . . Source

111g. . . Bungee

112. . . First trunk pixel electrode

112a. . . First main department

112b. . . Second main department

112c. . . Conductive layer

113. . . First branch pixel electrode

114. . . First capacitor

114a. . . Lower electrode

114b. . . Dielectric layer

114c. . . Upper electrode

115. . . First opaque connection line

116. . . The protective layer

116a. . . Through hole

120. . . Second subpixel

121. . . Second active component

121g. . . Bungee

122. . . Second trunk pixel electrode

122a. . . Third main department

122b. . . Fourth main department

123. . . Second branch pixel electrode

124. . . Second capacitor

124c. . . Upper electrode

125. . . Second opaque connecting line

126a. . . Through hole

D1. . . First display area

D2. . . Second display area

V. . . Vertical direction

H. . . horizontal direction

I. . . Line segment

II. . . Line segment

III. . . Line segment

F1. . . First alignment zone

F2. . . Second alignment zone

S1. . . Third alignment zone

S2. . . Fourth alignment zone

A. . . curve

B. . . curve

C. . . curve

D. . . curve

E. . . curve

F. . . curve

FIG. 1 is a schematic view showing a display panel according to a first embodiment of the present invention in a wide viewing angle display mode.

FIG. 2 is a schematic view showing the display panel of FIG. 1 in a narrow viewing angle display mode.

Fig. 3 is a plan view showing the pixel of Fig. 1.

Figure 4 is a cross-sectional view along line I and line II of Figure 3.

Figure 5 is a plan view of a pixel in accordance with a second embodiment of the present invention.

Figure 6 is a plan view of a pixel in accordance with a third embodiment of the present invention.

Fig. 7 is a plan view showing a pixel according to a fourth embodiment of the present invention.

Figure 8 is a plan view of a pixel in accordance with a fifth embodiment of the present invention.

Figure 9 is a graph showing luminance/grayscale values for a plurality of embodiments of the present invention.

Figure 10 is a graph showing the contrast ratio/grayscale value curve for a plurality of embodiments of the present invention at a side angle of view (azimuth angle of 60 degrees).

Figure 11 is a cross-sectional view along line III of Figure 3.

Figure 12 is a cross-sectional view showing a first sub-pixel of another variation of the present invention, the cross-sectional position of which is the same as that of Figure 11.

100. . . Pixel

102. . . Data line

104. . . Scanning line

106. . . Common potential line

110. . . First subpixel

111. . . First active component

111g. . . Bungee

112. . . First trunk pixel electrode

112a. . . First main department

112b. . . Second main department

113. . . First branch pixel electrode

114. . . First capacitor

114c. . . Upper electrode

115. . . First opaque connection line

116a. . . Through hole

120. . . Second subpixel

121. . . Second active component

121g. . . Bungee

122. . . Second trunk pixel electrode

122a. . . Third main department

122b. . . Fourth main department

123. . . Second branch pixel electrode

124. . . Second capacitor

124c. . . Upper electrode

I. . . Line segment

II. . . Line segment

III. . . Line segment

F1. . . First alignment zone

F2. . . Second alignment zone

S1. . . Third alignment zone

S2. . . Fourth alignment zone

Claims (25)

A display panel includes: at least one first display area and at least one second display area, each having a plurality of pixels, wherein each of the pixels comprises: a first sub-pixel, comprising: a first active component a first main pixel element electrically connected to the first active element; and a plurality of first branch pixel electrodes electrically connected to the first trunk pixel electrode, wherein the first branch pixel electrodes The misalignment is disposed on two sides of the first trunk pixel and defines a plurality of alignment directions different in direction; and a second sub-pixel adjacent to the first sub-pixel and includes: a second active component a second trunk pixel electrode electrically connected to the second active component; and a plurality of second branch pixel electrodes electrically connected to the second trunk pixel electrode, wherein the second branch pixel electrodes Defining a plurality of directional fields having different directions; wherein when the display panel is in a narrow viewing angle display mode and the first display area and the second display area respectively display a front view brightness, the first display area The driving voltage of a sub-pixel is substantially larger than the second sub-pixels in the first display area and the driving voltages of the first sub-pixels and the second sub-pixels in the second display area And driving voltages of the second sub-pixels in the first display area are substantially smaller than the first sub-pixels in the first display area and the first sub-pictures in the second display area And the driving voltage of the second sub-pixels. The display panel of claim 1, wherein the first trunk pixel electrode comprises an opaque conductive layer. The display panel of claim 2, wherein the second trunk pixel electrode comprises another opaque conductive layer. The display panel of claim 2, wherein the second sub-pixel further comprises a second opaque connecting line, the second opaque connecting line is at least partially overlapped under the second trunk pixel electrode, and The second active component and the second trunk pixel electrode are electrically connected. The display panel of claim 4, wherein the second active component comprises a drain, the second opaque connecting line is connected to the drain, and the second opaque connecting line is identical to the drain The metal layer is composed of. The display panel of claim 2, wherein the second branch pixel electrodes are misaligned on both sides of the second trunk pixel. The display panel of claim 1, wherein the first sub-pixel further comprises a first opaque connecting line, the first opaque connecting line is at least partially overlapped under the first trunk pixel electrode, and The first active component and the first trunk pixel electrode are electrically connected. The display panel of claim 7, wherein the first active component comprises a drain, the first opaque connecting line is connected to the drain, and the first opaque connecting line is identical to the drain The metal layer is composed of. The display panel of claim 7, wherein the second trunk pixel electrode comprises an opaque conductive layer. The display panel of claim 7, wherein the second sub-pixel further comprises a second opaque connecting line, the second opaque connecting line is at least partially overlapped under the second trunk pixel electrode, and The second active component and the second trunk pixel electrode are electrically connected. The display panel of claim 10, wherein the second active component comprises a drain, the second opaque connecting line is connected to the drain, and the second opaque connecting line is identical to the drain The metal layer is composed of. The display panel of claim 7, wherein the second branched pixel electrodes are misaligned on both sides of the second trunk pixel. The display panel of claim 1, wherein the first trunk pixel electrode comprises a first trunk portion and a second trunk portion electrically connected to each other and staggered, the second trunk portion A sub-pixel is divided into a first alignment area and a second alignment area having unequal areas. The display panel of claim 13, wherein the first branching pixel electrodes are misaligned with at least one of the first trunk portion and the second trunk portion, and form an acute angle. The display panel of claim 13, wherein an area ratio of the first alignment area to the second alignment area of each of the first sub-pixels is substantially greater than or equal to 5. The display panel of claim 1, wherein the second trunk pixel electrode comprises a third trunk portion and a fourth trunk portion electrically connected to each other and staggered, the fourth trunk portion The two sub-pixels are divided into a third alignment area and a fourth alignment area having unequal areas. The display panel of claim 16, wherein an area ratio of the third alignment area to the fourth alignment area of each of the second sub-pixels is substantially greater than or equal to 5. The display panel of claim 1, wherein the second branched pixel electrodes are symmetrically disposed on opposite sides of the second trunk pixel. The display panel of claim 1, wherein the first sub-pixel of each pixel and the second sub-pixel are arranged in a vertical direction, and the first sub-pixel of each pixel The staggered arrangement of the second sub-pixels of adjacent pixels in a horizontal direction. A display panel includes: at least one first display area and at least one second display area, each having a plurality of pixels, wherein each of the pixels comprises: a first sub-pixel, comprising: a first active component a first opaque connecting line electrically connected to the first active component; and a plurality of first branching pixel electrodes electrically connected to the first opaque connecting line, wherein the first branching pixel electrodes are defined a plurality of directional fields having different directions; and a second sub-pixel adjacent to the first sub-pixel, and comprising: a second active component; a second trunk pixel electrode electrically connected to the second active component And a plurality of second branch pixel electrodes electrically connected to the second trunk pixel electrode, wherein the second branch pixel electrodes define a plurality of alignment directions different in direction; wherein when the display panel is in a narrow When the viewing angle display mode and the first display area and the second display area respectively display a front view brightness, the driving voltages of the first sub-pixels in the first display area are substantially larger than the first display The second sub-pixels in the area and the driving voltages of the first sub-pixels and the second sub-pixels in the second display area, and the second sub-parts in the first display area The driving voltage of the pixel is substantially smaller than the first sub-pixels in the first display area and the driving voltages of the first sub-pixels and the second sub-pixels in the second display area. The display panel of claim 20, wherein the first active component comprises a drain, the first opaque connecting line is connected to the drain, and the first opaque connecting line is identical to the drain The metal layer is composed of. The display panel of claim 20, wherein the first sub-pixel further comprises a first trunk pixel electrode, the first trunk pixel electrode is overlapped with the first opaque connection line, and is electrically Connecting the first active component and the first branched pixel electrodes. The display panel of claim 22, wherein the first trunk pixel electrode comprises a first trunk portion and a second trunk portion electrically connected to each other and staggered, the second trunk portion A sub-pixel is divided into a first alignment area and a second alignment area having unequal areas. The display panel of claim 23, wherein an area ratio of the first alignment area to the second alignment area of each of the first sub-pixels is substantially greater than or equal to 5. The display panel of claim 20, wherein the first sub-pixel of each pixel and the second sub-pixel are arranged in a vertical direction, and any two adjacent paintings in a horizontal direction The first sub-pixel of the element is opposite to the arrangement order of the second sub-pixel.