TWI521272B - Display panel - Google Patents

Description

Display panel

The present invention relates to an electronic component, and more particularly to a display panel.

Due to the advantages of small size, low radiation, and the like, display panels have been commonly used in a wide variety of electronic products. With the development of display technology, consumers are increasingly demanding display panel specifications. In addition to the high resolution of the display panel, consumers also want the display panel to display natural colors. Therefore, in addition to high resolution, the NTSC (National Television System Committee) ratio in the display panel specifications is also highly valued by consumers.

A conventional display panel includes a pixel substrate, an opposite substrate with respect to the pixel substrate, and a display medium layer disposed between the pixel substrate and the opposite substrate. The pixel substrate has a plurality of pixel arrays. The opposite substrate has a plurality of filter patterns respectively overlapping the pixel array in the vertical projection direction. Each pixel array and a corresponding filter pattern form a display unit. When two adjacent display units are used to display different colors, in order to avoid problems such as color mixing between two adjacent display units, a light shielding pattern layer is provided on the opposite substrate at the edge of the filter pattern. However, when the pixel substrate and the counter base When the alignment of the board is not good, the light shielding pattern layer cannot effectively avoid the occurrence of the color mixing problem, and the NTSC ratio of the display panel is lowered.

The present invention provides a display panel having a high NTSC ratio.

The invention provides a display panel comprising a substrate, a counter substrate and a display medium layer. The substrate includes a plurality of pixel arrays, a plurality of data lines, a plurality of scan lines, an insulating layer, a conductive light shielding layer, and a first transparent electrode. A plurality of pixel arrays are disposed on the substrate. The data line and the scan line are disposed on the substrate. The data lines and scan lines are interleaved with each other to define a pixel array. The pixel arrays are electrically connected to the corresponding data lines and the corresponding scan lines. The insulating layer covers the data lines, the scan lines, and the pixel array. The conductive light shielding layer is disposed on the insulating layer and overlaps the data line in a vertical projection direction. The first transparent electrode is disposed on the insulating layer. The first transparent electrode includes a first portion and a second portion. The first portion is in direct contact with and electrically connected to the conductive light shielding layer. The opposite substrate is disposed opposite to the substrate. The opposite substrate includes a light shielding pattern layer and a color filter layer. The light shielding pattern layer is disposed on the opposite substrate and has a first light shielding portion. The first light shielding portion overlaps with the corresponding data line in the vertical projection direction. The width of the first light blocking portion is W1. The conductive light shielding layer has a width of W2. The line width of each data line is W3. W1≧W2>W3. The color filter layer is disposed on the light shielding pattern layer and the opposite substrate. The display medium layer is disposed between the substrate and the opposite substrate.

In an embodiment of the invention, each of the pixel arrays includes an active component and a second transparent electrode electrically connected to the active component. First transparent electrode The two portions overlap with the second transparent electrode in the vertical projection direction.

In an embodiment of the invention, the first portion of the first transparent electrode is located between the conductive light shielding layer and the data line.

In an embodiment of the invention, the conductive light shielding layer is located between the first portion of the first transparent electrode and the data line.

In an embodiment of the invention, the width relationship between the width of the conductive light shielding layer and the width of the first light shielding portion is W2/W1, and W2/W1 is substantially between 0.37 and 1, and the line width of the data line is The width ratio of a light shielding portion is W3/W1, and W3/W1 is substantially between 0.25 and 0.8.

In an embodiment of the invention, the above W2/W1 is substantially between 0.4 and 0.6, and W3/W1 is substantially between 0.4 and 0.5.

In an embodiment of the invention, the conductive light shielding layer has a height H in a vertical projection direction. The ratio of the height of the conductive light shielding layer to the line width of the data line is H/W3, and H/W3 is substantially between 0.03 and 0.2.

In an embodiment of the invention, the H/W3 is substantially between 0.05 and 0.08.

In an embodiment of the invention, the first transparent electrode is a common electrode, and the second transparent electrode is a pixel electrode.

In an embodiment of the invention, the light shielding pattern layer further includes a second light shielding portion. The second light blocking portion is interlaced with the first light blocking portion. The second light shielding portion overlaps the scanning line in the vertical projection direction.

Based on the above, in the display panel of an embodiment of the present invention, the light shielding pattern The width of the first light shielding portion is W1, the width of the conductive light shielding layer is W2, the line width of the data line is W3, and W1≧W2>W3. Through the design of "W1≧W2>W3", most of the light beam transmitted through the partial display medium corresponding to the opened pixel array and transmitted to the second filter pattern corresponding to the closed pixel array is shielded by conductive The layer and the light-shielding pattern layer are blocked from easily passing through the second filter pattern, so that the color mixing problem in the prior art can be improved.

The above described features and advantages of the invention will be apparent from the following description.

100‧‧‧Substrate

110‧‧‧Base

110a‧‧‧ bearing surface

120‧‧‧ pixel array

122‧‧‧Second transparent electrode

130‧‧‧Insulation

140, 140A‧‧‧ conductive blackout layer

150‧‧‧First transparent electrode

152‧‧‧ first

154‧‧‧ Second

156‧‧‧ Third

200‧‧‧ opposite substrate

210‧‧‧Base

220‧‧‧Lighting pattern layer

222‧‧‧First Shade

224‧‧‧Second shade

226‧‧‧Light hole

230‧‧‧Color filter layer

232‧‧‧First filter pattern

234‧‧‧Second filter pattern

Edge of 232a, 234a‧‧

300‧‧‧Display media layer

1000, 1000A‧‧‧ display panel

A-A’, B-B’‧‧‧ cut line

CH‧‧‧ channel

D‧‧‧汲

DL‧‧‧ data line

G‧‧‧ gate

H‧‧‧ Height

K‧‧‧ area

L‧‧‧beam

R1, R2‧‧‧ area

S‧‧‧ source

SL‧‧‧ scan line

S100, S200‧‧‧ curve

S‧‧‧slit

T‧‧‧ active components

W0, W1, W2‧‧‧ width

W3‧‧‧ line width

x, y‧‧‧ direction

1 is a cross-sectional view of a display panel in accordance with an embodiment of the present invention.

2 is a top plan view of the substrate of FIG. 1.

3 is a cross-sectional view of a display panel in accordance with another embodiment of the present invention.

4 is a top plan view of the opposite substrate of FIG. 1.

5 shows the NTSC ratio in the case where the display panel of FIG. 1 generates a large-view character bias in the light-shielding pattern layer and the NTSC ratio in the case where the display panel of the comparative example produces a large-view character bias in the light-shielding pattern layer.

1 is a cross-sectional view of a display panel in accordance with an embodiment of the present invention. Referring to FIG. 1 , the display panel 1000 includes a substrate 100 and a pair opposite to the substrate 100 . The substrate 200 and the display medium layer 300 disposed between the substrate 100 and the opposite substrate 200. In the present embodiment, the display medium layer 300 may include liquid crystal molecules, an electrophoretic display medium, or other applicable medium. In the following embodiments of the present invention, the display medium layer 300 is exemplified by a liquid crystal molecular layer, but is not limited thereto. Furthermore, the liquid crystal molecular layer in the following embodiments of the present invention is preferably a liquid crystal molecule which can be rotated or switched by a horizontal electric field or a liquid crystal molecular layer which can be rotated or switched by a lateral electric field, but is not limited thereto. this.

2 is a top plan view of the substrate of FIG. 1. In particular, the cross section of the substrate 100 of Fig. 1 is depicted in accordance with the section line A-A' of Fig. 2. Referring to FIG. 1 and FIG. 2 simultaneously, the substrate 100 includes a substrate 110, a plurality of pixel arrays 120 disposed on the substrate 110, a plurality of data lines DL disposed on the substrate 110, and a plurality of scan lines disposed on the substrate 110. The SL, the insulating layer 130, the conductive light shielding layer 140, and the first transparent electrode 150. In this embodiment, the substrate 110 is light transmissive, and the material of the substrate 110 may be made of glass, quartz, organic polymer or other applicable materials.

Referring to FIG. 2, a plurality of data lines DL are arranged in parallel. A plurality of scanning lines SL are arranged in parallel. The data line DL and the scan line SL are alternately arranged with each other and belong to different two conductive film layers. In this embodiment, the conductive film layer to which the scan line SL belongs may be located between the conductive film layer to which the data line DL belongs and the substrate 110. However, the present invention is not limited thereto, and the relative position between the conductive film layer to which the scanning line SL belongs and the conductive film layer to which the data line DL belongs and the substrate 110 may be other suitable designs depending on actual needs. The data line DL and the scan line SL are generally made of a metal material. However, the present invention is not limited thereto, and other conductive materials may be used for the scan line SL and the data line DL. For example: alloy, metal A nitride of a material, an oxide of a metal material, an oxynitride of a metal material, or a stacked layer of a metal material and other conductive materials.

Referring to FIG. 2, the data line DL and the scan line SL define a plurality of pixel arrays 120. The pixel arrays 120 are electrically connected to the corresponding data lines DL and scan lines SL, respectively. In detail, each pixel array 120 is surrounded by two adjacent data lines DL and two adjacent scanning lines SL. Each pixel array 120 includes an active component T and a second transparent electrode 122 electrically connected to the active component. The active element T is, for example, a thin film transistor. The active device T has a gate G, a channel CH overlapping the gate G in the vertical projection direction y, and a source S and a drain D electrically connected to the opposite sides of the channel CH, respectively. The source S of the active device T is electrically connected to the data line DL. The gate G of the active device T is electrically connected to the scan line SL. In this embodiment, the drain D of the active device T is electrically connected to the second transparent electrode 122. In other words, the second transparent electrode 122 can be a pixel electrode.

Referring to FIGS. 1 and 2, the insulating layer 130 covers the data line DL, the scan line SL, and the pixel array 120. The insulating layer 130 is disposed between the first transparent electrode 150 and the second transparent electrode 122 , and the second transparent electrode 122 is located between the insulating layer 130 and the substrate 110 . In other words, the second transparent electrode 122 used as the pixel electrode can be selectively disposed under the first transparent electrode 150 serving as the common electrode. The first transparent electrode 150 used as a common electrode has a reference voltage. The material of the insulating layer 130 may be an inorganic material (for example, yttria, tantalum nitride, ytterbium oxynitride, or a stacked layer of at least two materials described above), an organic material, or a combination thereof.

Referring to FIG. 1 and FIG. 2 , the conductive light shielding layer 140 is disposed on the insulating layer 130 . Up and overlapping with the data line DL in the vertical projection direction y. The film layer of the conductive light shielding layer 140 is disposed differently from the data line DL and the scan line SL. In detail, in the present embodiment, the film layer of the conductive light shielding layer 140 is disposed farther from the substrate 110 than the film layer of the data line DL and the scan line SL. As shown in FIG. 2, in the embodiment, the conductive light shielding layer 140 may include a plurality of conductive light-shielding strips spaced apart from each other, each of the conductive light-shielding strips overlapping with a corresponding one of the data lines DL, and an extension of each of the conductive light-shielding strips The direction is parallel to the extending direction of the corresponding one of the data lines DL.

Referring to FIG. 1 and FIG. 2 , in the embodiment, the first portion 152 of the first transparent electrode 150 is located between the conductive light shielding layer 140 and the data line DL. The insulating layer 130 is located between the first portion 152 of the first transparent electrode 150 and the data line DL. The first portion 152 of the first transparent electrode 150 is located between the conductive light shielding layer 140 and the insulating layer 130. In short, the conductive light shielding layer 140 can selectively partially cover the first portion 152 of the first transparent electrode 150. However, the present invention is not limited thereto, and in other embodiments, the conductive light shielding layer 140 may also be disposed at other suitable positions. For example, FIG. 3 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention. Referring to FIG. 3, the display panel 1000A of FIG. 3 is similar to the display panel 1000 of FIG. 1A, and thus the same or corresponding components are the same. Or the corresponding label is indicated. In the embodiment of FIG. 3, the conductive light shielding layer 140A may also be disposed between the first portion 152 of the first transparent electrode 150 and the data line DL. In other words, the first portion 152 of the first transparent electrode 150 may also partially cover the conductive light shielding layer 140A.

Referring to FIGS. 1 and 2 , the first transparent electrode 150 is disposed on the insulating layer 130 . The first transparent electrode 150 includes a first portion 152 and a second portion 154. First The 152 is in direct contact with the conductive light shielding layer 140 and is electrically connected. In the present embodiment, the extending direction of the first portion 152 is parallel to the extending direction of the data line DL. The width W0 of the first portion 152 of the first transparent electrode 150 is greater than the width W2 of the conductive light shielding layer 140. The region K where the first portion 152 of the first transparent electrode 150 is in contact with the conductive light shielding layer 140 overlaps the data line DL in the vertical projection direction y and is located between the data line DL and the first portion 152 of the first transparent electrode 150. The extending direction of the second portion 154 is parallel to the extending direction of the first portion 152. The plurality of second portions 154 are disposed alternately between the two adjacent first portions 152 in the x direction. The first transparent electrode 150 further includes a third portion 156. The extending direction of the third portion 156 is parallel to the extending direction of the scanning line SL. The third portion 156 is electrically connected to the first portion 152 and the second portion 154. The second portion 154 of the first transparent electrode 150 partially overlaps the second transparent electrode 122 in the vertical projection direction y. Further, any two adjacent second portions 154 have a slit s separating the plurality of second portions 154, and the second transparent electrode 122 and the second portion 154 of the first transparent electrode 150 are vertically projected. The direction y overlaps. In short, the display panel 1000 of the present embodiment may be a Fringe-Field Switching (FFS) display panel, but the invention is not limited thereto.

4 is a top plan view of the opposite substrate of FIG. 1. In particular, the cross section of the counter substrate of Fig. 1 is depicted in accordance with the line B-B' of Fig. 4. Referring to FIG. 1 and FIG. 4 simultaneously, the opposite substrate 200 includes a substrate 210, a light shielding pattern layer 220 (and a color filter layer 230. The light shielding pattern layer 220 is located between the portion of the color filter layer 230 and the substrate 210. The light shielding pattern The layer 220 has a plurality of first light blocking portions 222 and a plurality of second light blocking portions 224 intersecting the first light blocking portions 222. The plurality of first light blocking portions 222 and the plurality of The two light shielding portions 224 enclose a plurality of light transmission holes 226. These light transmission holes 226 respectively expose the second transparent electrode 122 used as a pixel electrode. Referring to FIG. 1 , FIG. 2 and FIG. 4 , each of the first light shielding portions 222 overlaps with a corresponding one of the data lines DL in the vertical projection direction y. Furthermore, the extending direction of each of the first light blocking portions 222 is parallel to the extending direction of the corresponding one of the data lines DL. The second light blocking portion 224 overlaps with the corresponding one scanning line SL in the vertical projection direction y. Furthermore, the extending direction of each of the second light blocking portions 224 is parallel to the extending direction of the corresponding one of the scanning lines SL. In this embodiment, the material of the light-shielding pattern layer 220 may be a black resin, but the invention is not limited thereto. In other embodiments, the light-shielding pattern layer 220 may also be made of other suitable materials, such as chromium.

Referring to FIGS. 1 and 4 , the color filter layer 230 includes at least a first filter pattern 232 and a second filter pattern 234 having different colors. The first light blocking portion 222 shields the edges 232a, 234a of the adjacent first filter pattern 232 and the second filter pattern 234. Referring to FIG. 1 , FIG. 2 and FIG. 4 , it is noted that the width of the first light shielding portion 222 in the x direction is W1, the width of the conductive light shielding layer 140 in the x direction is W2, and the data line DL is in the x direction. The line width is W3, and W1≧W2>W3. Furthermore, the width W2 of the conductive light-shielding layer 140 is proportional to the width W1 of the first light-shielding portion 222 such that W2/W1 is substantially between 0.37 and 1, and the line width W3 of the data line DL is different from the first light-shielding portion. The width W1 of 222 has a proportional relationship of W3/W1 which is substantially between 0.25 and 0.8. More preferably, W2/W1 is substantially between 0.4 and 0.6, and W3/W1 is substantially between 0.4 and 0.5. The conductive light shielding layer 140 has a height H in the vertical projection direction y, and the height H of the conductive light shielding layer 140 and the data line DL The proportional relationship of the line width is such that H/W3 is substantially between 0.03 and 0.2. More preferably, H/W3 is substantially between 0.05 and 0.08. Specifically, W1 is substantially between 5 microns and 8 microns, W2 is substantially between 4 microns and 8 microns, W3 is substantially between 2 microns and 3 microns, and H is substantially between 0.15. Between microns and 0.4 microns, but the invention is not limited thereto.

Please refer to FIG. 1 , FIG. 2 and FIG. 4 . It is worth mentioning that when the adjacent two pixel arrays 120 of different colors are used to display the same energy and the other is disabled (ie, the display panel 1000 is to be displayed and the first When the color corresponding to the filter pattern 232 is not intended to display the color corresponding to the second filter pattern 234, a portion of the region R1 shows that the dielectric layer 130 is driven, and a portion of the region R2 shows that the dielectric layer 130 is not. Driven, through the design of "W1≧W2>W3", the light beam L that is displayed through the portion of the region R1 and that is transmitted to the second filter pattern 234 is mostly shielded by the conductive light shielding layer 140 and the light shielding pattern layer. 220 blocked. As a result, the light beam L passing through the enabled pixel array 120 is less likely to pass through the second filter pattern 234 corresponding to the unenabled pixel array 120, so that the color mixing problem in the prior art can be improved. In addition, in the embodiment of FIG. 1 , since the conductive light shielding layer 140 is in electrical contact with the first portion 152 of the first transparent electrode 150 , the collection and data of the first transparent electrode 150 and the conductive light shielding layer 140 used as the common electrode are provided. The equivalent distance between the lines DL is increased, so that the parasitic capacitance between the common electrode and the data line DL can be lowered, contributing to the performance improvement of the display panel 1000.

FIG. 5 is a diagram showing an NTSC (National Television System Committee) ratio of a display panel of FIG. 1 in a case where a light-shielding pattern layer is distorted; The NTSC ratio of the display panel of a comparative example in the case where the light-shielding pattern layer produces a large-view character bias. The display panel of the comparative example differs from the display panel of FIG. 1 mainly in that the display panel of the comparative example does not have the conductive light shielding layer 140 of the display panel of FIG. Referring to FIG. 5, a curve S100 represents the NTSC ratio of the display panel 1000 of FIG. 1 at various viewing angles, and a curve S200 represents the NTSC ratio of the display panel of the comparative example at various viewing angles. Comparing the curves S100 and S200, the NTSC ratio of the display panel 1000 of FIG. 1 in the case of generating a large-view character bias (for example, a viewing angle greater than 30 degrees) is significantly higher than that of the display panel of the comparative example at a corresponding angle. The NTSC ratio of the situation. In detail, the NTSC ratio of the display panel 1000 of FIG. 1 is greater than 75% at the same large viewing angle, for example, at a viewing angle of 40 degrees, and the NTSC ratio of the display panel of the comparative example is less than 75%. It can be seen that the arrangement of the conductive light-shielding layer 140 according to an embodiment of the present invention can significantly improve the problem of color mixing in the prior art, and can maintain a high NTSC ratio even in the case of a large-view character bias.

As described above, in the display panel of the embodiment of the present invention, the width of the first light shielding portion of the light shielding pattern is W1, the width of the conductive light shielding layer is W2, the line width of the data line is W3, and W1≧W2>W3 . Through the design of "W1≧W2>W3", most of the light beam transmitted through the partial display medium corresponding to the opened pixel array and transmitted to the second filter pattern corresponding to the closed pixel array is shielded by conductive The layer and the light-shielding pattern layer are blocked from easily passing through the second filter pattern, so that the color mixing problem in the prior art can be improved.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art without departing from the invention In the spirit and scope, the scope of protection of the present invention is subject to the definition of the scope of the appended patent application.

100‧‧‧Substrate

110‧‧‧Base

110a‧‧‧ bearing surface

122‧‧‧Second transparent electrode

130‧‧‧Insulation

140‧‧‧ conductive blackout layer

150‧‧‧First transparent electrode

152‧‧‧ first

154‧‧‧ Second

200‧‧‧ opposite substrate

210‧‧‧Base

222‧‧‧First Shade

226‧‧‧Light hole

230‧‧‧Color filter layer

232‧‧‧First filter pattern

234‧‧‧Second filter pattern

Edge of 232a, 234a‧‧

300‧‧‧Display media layer

1000‧‧‧ display panel

A-A’, B-B’‧‧‧ cut line

DL‧‧‧ data line

H‧‧‧ Height

K‧‧‧ area

L‧‧‧beam

R1, R2‧‧‧ area

S‧‧‧slit

W0, W1, W2‧‧‧ width

W3‧‧‧ line width

x, y‧‧‧ direction

Claims (10)

A display panel includes: a substrate, comprising: a plurality of pixel arrays disposed on the substrate; a plurality of data lines and a plurality of scan lines disposed on the substrate, the data lines and the scan lines being interlaced with each other Setting to define the pixel arrays, and the pixel arrays are electrically connected to the corresponding data lines and the corresponding scan lines respectively; an insulating layer covering the data lines, the scan lines, and the a pixel array; a conductive light shielding layer disposed on the insulating layer and overlapping the data lines in a vertical projection direction; and a first transparent electrode disposed on the insulating layer, wherein the first transparent layer The electrode includes a first portion and a plurality of second portions, the first portion is in direct contact with and electrically connected to the conductive light shielding layer, and the pair of the opposite substrate is disposed opposite to the substrate, and includes: a light shielding pattern layer disposed on the electrode a first light-shielding portion is overlapped with the corresponding one of the data lines in the vertical projection direction, wherein the width of the first light-shielding portion is W1, and the width of the conductive light-shielding layer is W2, every a line width of the data line is W3, and W1≧W2>W3; and a color filter layer disposed on the light shielding pattern layer and the opposite substrate; A display medium layer is disposed between the substrate and the opposite substrate. The display panel of claim 1, wherein each of the pixel arrays comprises: an active component; and a second transparent electrode electrically connected to the active component, and the first transparent electrode The second portion and the second transparent electrode overlap in the vertical projection direction. The display panel of claim 1, wherein the first portion of the first transparent electrode is located between the conductive light shielding layer and the data line. The display panel of claim 1, wherein the conductive light shielding layer is located between the first portion of the first transparent electrode and the data line. The display panel of claim 1, wherein the width of the conductive light shielding layer and the width of the first light shielding portion are W2/W1, and W2/W1 is substantially between 0.37 and 1, and the The relationship between the line width of the data line and the width of the first light shielding portion is W3/W1, and W3/W1 is substantially between 0.25 and 0.8. The display panel of claim 5, wherein a ratio of a width of the conductive light shielding layer to a width of the first light shielding portion is W2/W1, and W2/W1 is substantially between 0.4 and 0.6, and The relationship between the line width of the data line and the width of the first light shielding portion is W3/W1, and W3/W1 is substantially between 0.4 and 0.5. The display panel of claim 1, wherein the conductive light shielding layer has a height H in the vertical projection direction, and the ratio of the height of the conductive light shielding layer to the line width of the data line is H/ W3, H/W3 is substantially between 0.03 and 0.2. The display panel of claim 7, wherein the ratio of the height of the conductive light shielding layer to the line width of the data line is H/W3, and H/W3 is substantially between 0.05 and 0.08. The display panel of claim 2, wherein the first transparent electrode is a common electrode, and the second transparent electrode is a pixel electrode. The display panel of claim 9, wherein the light shielding pattern layer further comprises a second light shielding portion interlaced with the first light shielding portion, wherein the second light shielding portion and the scanning line are in a vertical projection direction overlapping.