TW201303436A - Display panel - Google Patents

Abstract

A display panel including a first substrate, a second substrate, a color filter layer, an active device array, and a display medium layer us provided. The color filter layer includes a first color filter pattern and a second color filter pattern. The first color filter pattern is a blue filter pattern. The second color filter pattern has a first protrusion portion protruding outward from a side of the second color filter pattern adjacent to the first color filter pattern. The first color filter and the second color filter pattern respectively define a first pixel area and a second pixel area which are respectively driven by one active device of the active device array. The first protrusion portion of the second color filter pattern is located right above the active device driving the first pixel area.

Description

Display panel

The present invention relates to a display panel, and more particularly to a display panel having stable component characteristics.

A general thin film transistor liquid crystal display panel is composed of a thin film transistor array substrate, a color filter substrate, and a liquid crystal layer disposed between the two substrates. Among them, the well-known thin film transistors can be roughly divided into amorphous germanium thin film transistors and polycrystalline germanium thin film transistors. Since amorphous germanium thin film transistors are relatively simple in process, they are driven by amorphous germanium thin film transistor arrays. The technology of liquid crystal is still the mainstream.

However, the amorphous germanium thin film transistor component itself still has some problems. For example, the amorphous germanium layer in the thin film transistor may generate light leakage after being irradiated by the reflected light of the front light source, the backlight, the external light source, or even these light sources. Current. The above-mentioned light leakage current not only affects the performance of the thin film transistor component itself, but also causes problems such as flicker or cross talk during display.

Further, in the thin film transistor liquid crystal display panel, the color filter pattern on the color filter substrate causes the light irradiated to the thin film transistor to exhibit a predetermined color. That is, the light that is incident on the thin film transistor is a colored light having a specific color. In general, amorphous germanium has different absorption coefficients for different colored lights. In terms of blue light, green light and red light, amorphous germanium has the largest absorption coefficient for blue light, and the absorption coefficient for green light is about 1/8 of the absorption coefficient of blue light, and the absorption coefficient for red light is lower. Therefore, in the entire thin film transistor liquid crystal display panel, different degrees of leakage current may occur in the thin film transistors at different positions, and the thin film transistor irradiated by the blue light will cause the most serious leakage current. As a result, the element characteristics of the thin film transistor liquid crystal display panel are not stable and it is not easy to improve such instability by the modulation of the driving signal.

The invention provides a display panel, which utilizes the layout design of the color filter layer to avoid the active component being exposed to blue light, and helps to improve the light leakage current condition of the active component and further to make the display panel have stable component characteristics.

The invention provides a display panel comprising a first substrate, a second substrate, a color filter layer, an active device array and a display medium layer. The second substrate is opposite to the first substrate. The color filter layer is disposed on the first substrate. The color filter layer includes an adjacent first color filter pattern and a second color filter pattern. The second color filter pattern has a first protrusion protruding outward from a side of the second color filter pattern adjacent to the first color filter pattern, wherein the first color filter pattern is a blue filter pattern . The active device array includes a plurality of active components disposed on the second substrate. The first color filter pattern and the second color filter pattern respectively define at least one first pixel region and at least one second pixel region, and the first pixel region and the second pixel region are respectively composed of one of the active elements The first protrusion of the second color filter pattern is driven directly above the active element driving the first pixel region. The display medium layer is disposed between the color filter layer and the active device array.

Based on the above, the present invention provides color filter patterns of other colors directly above the active elements for driving the blue pixel regions. That is, the present invention can design the color filter pattern disposed directly above all the active elements as other color filter patterns other than the blue filter pattern by the layout design of the color filter patterns. Therefore, whether the external light source, the front light source, or the backlight passes through the color filter layer, the color light that is irradiated onto the active device is not blue light, and helps to avoid serious light leakage current of the active device due to being irradiated by blue light. In addition, the present invention can further make the color filter patterns above all the active elements the same color, so that the light leakage current phenomenon of all active elements is uniform to maintain stable element characteristics.

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

1 is a cross-sectional view showing a display panel according to a first embodiment of the present invention. Referring to FIG. 1 , the display panel 100 includes a first substrate 110 , a second substrate 120 , a color filter layer 130 , an active device array 140 , and a display dielectric layer 150 . The second substrate 120 is opposite to the first substrate 110. The color filter layer 130 is disposed on the first substrate 110. The color filter layer 130 includes two first color filter patterns 132, a second color filter pattern 134, and a third color filter pattern 136. The second color filter pattern 134 has a first protrusion 134A protruding outward from a side S1 of the second color filter pattern 134 adjacent to the first color filter pattern 132. The active device array 140 includes a plurality of active components 142 disposed on the second substrate 120. The display medium layer 150 is disposed between the color filter layer 130 and the active device array 140.

In this embodiment, the first color filter pattern 132 and the second color filter pattern 134 respectively define, for example, at least a first pixel region R1 and at least a second pixel region R2, respectively, and the first pixel region R1 and the second pixel region R2 are respectively driven by one of the active elements 142. Further, in the present embodiment, the first convex portion 134A of the second color filter pattern 134 is located directly above the active element 142 that drives the first pixel region R1.

It should be noted that the first color filter pattern 132 is a blue filter pattern, and the second color filter pattern 134 and the third color filter pattern 136 may be other color filters other than the blue filter pattern. pattern. For example, the second color filter pattern 134 and the third color filter pattern 136 may be one of a red filter pattern and a green filter pattern, respectively. In addition, the present embodiment is described by taking a color filter pattern of three colors in the display panel 100 as an example. However, in other embodiments, the display panel 100 may only be provided with two color filter patterns or three types. A color filter pattern above the color.

The active element 142 is, for example, a thin film transistor that utilizes a semiconductor material as a channel layer. The semiconductor material in active device 142 has a higher absorption coefficient for blue light than for other colored light. Thus, illumination of the blue light on the active component 142 will cause significant leakage current conditions in the active component 142. On the contrary, the absorption coefficient of the semiconductor material for other color lights is significantly lower, so that the light leakage current generated by the other color light on the active device 142 is rather slight.

Therefore, in the embodiment, the first color filter pattern 132 and the first protrusion portion 134A of the second color filter pattern 134 are overlapped. Further, the first protrusion 134A is located between the first color filter pattern 132 and the display medium layer 150. That is, the first color filter pattern 132 is shielded by the first protrusion 134A corresponding to the active element 142. Therefore, in the first pixel region R1, the light L reflected from the outside, from the front light source, or from the backlight on the first substrate 110 is subjected to the second color filter before being irradiated onto the active device 142. The filtering effect of the pattern 134, the light L will not be blue light, to avoid the active element 142 from generating a significant light leakage current due to the reception of blue light.

In this embodiment, a color filter pattern other than blue (for example, the first protrusion 134A of the second color filter pattern 134) is disposed directly above the active device 142, and the color filter pattern other than blue is located in the blue color. The filter pattern (first color filter pattern 132) is between the active element 142. Therefore, the light L that is irradiated from the first substrate 100 toward the active element 142 is not blue light. As a result, the light leakage current situation of each active component 142 in the display panel 100 can be improved to improve the quality of the display panel 100, that is, the display panel 100 is less prone to severe flicker or mutual interference problems. Further, since the light leakage current condition of each active element 142 is not significant, the display panel 100 has relatively stable element characteristics.

In addition, the display panel 100 of the present embodiment further includes a black matrix pattern 160, a flat layer 170, and a common electrode layer 180 in addition to the components described above. The black matrix pattern 160 is disposed between the first substrate 110 and the color filter layer 130. The flat layer 170 is disposed between the color filter layer 130 and the display medium layer 150 , and the common electrode layer 180 is disposed between the flat layer 170 and the display medium layer 150 . Since the first color filter pattern 132 overlaps with the first protrusion portion 134A, the color filter layer 130 has a relatively thick thickness in the first pixel region R1. Therefore, the flat layer 170 is disposed such that the common electrode layer 180 is formed on a flat surface, but the invention is not limited thereto.

In detail, FIG. 2A to FIG. 2D illustrate a process of fabricating a color filter layer and a black matrix pattern in the display panel according to the first embodiment of the present invention. Referring to FIG. 2A, a black matrix pattern 160 is formed on the first substrate 110, wherein the black matrix pattern 160 has a plurality of openings 162 to define a plurality of first pixel regions R1, a plurality of second pixel regions R2, and more. A third pixel area R3. The material of the black matrix pattern 160 may be a light-shielding metal (for example, chrome), a light-shielding resin, or other light-shielding material.

Here, the first pixel area R1 is substantially the position set by the first color filter pattern 132 described in FIG. 1, and the second pixel area R2 is the position set by the second color filter pattern 134, and The third pixel region R3 is a position set by the third color filter pattern 136. Further, when the first substrate 110 is assembled with the second substrate 120 of FIG. 1, the lateral portion 164 of the black matrix pattern 160 corresponds, for example, to the position at which the active element 142 is disposed. That is, the cross-sectional view depicted in FIG. 1 substantially corresponds to the lateral portion 164 of the black matrix pattern 160.

Next, referring to FIG. 2B, a first color filter pattern 132 is formed in the first pixel region R1 defined by the black matrix pattern 160, wherein the material of the first color filter pattern 132 is a blue filter material. The first color filter pattern 132 is a strip pattern in this embodiment that fills the opening 162 defining the first pixel region R1 and also the lateral portion 164 of the black matrix pattern 160. However, in other embodiments, the first color filter pattern 132 may be a pattern of other shapes. For example, the first color filter pattern 132 may be formed by a plurality of independent patterns filled in the opening 162.

Subsequently, referring to FIG. 2C, a second color filter pattern 134 is formed on the black matrix pattern 160. Here, the second color filter pattern 134 is disposed in the second pixel region R2 defined by the black matrix pattern 160, and the second color filter pattern 134 is also a strip pattern. The material of the second color filter pattern 134 is a color filter material other than the blue filter material, and may be a red filter material, a green filter material, a yellow filter material, or the like.

In addition, the second color filter pattern 134 has a first protrusion 134A. The first protrusion 134A protrudes outward from the side S1 of the second color filter pattern 134 adjacent to the first color filter pattern 132, and the first protrusion 134A is disposed on the lateral portion 164 of the black matrix pattern 160. In addition, the first protrusion 134A directly covers a portion of the first color filter pattern 132, that is, the first protrusion 134A overlaps with the first color filter pattern 132.

Then, referring to FIG. 2D, a third color filter pattern 136 is further formed on the black matrix pattern 160, which is formed by a strip filter pattern disposed in the third pixel region R3. The material of the third color filter pattern 136 is a color filter material other than the blue filter material, and may be a red filter material, a green filter material, a yellow filter material, or the like. It is worth mentioning that the strip-shaped first color filter pattern 132, the strip-shaped second color filter pattern 134 and the strip-shaped third color filter pattern 136 together constitute the color filter layer 130. That is, the color filter layer 130 is a stripe type layout design. However, in other embodiments, the shapes of the first color filter pattern 132, the second color filter pattern 134, and the third color filter pattern 136 are not limited to strips, and the color filter layer 130 may be selectively triangular. (delta) layout design, mosaic layout design, etc.

3 is a cross-sectional view showing a display panel according to a second embodiment of the present invention. Referring to FIG. 3, the display panel 200 substantially approximates the display panel 100 of the first embodiment, and thus the same component symbols in the two embodiments will denote the same components. Specifically, the main difference between the present embodiment and the first embodiment is that the protective layer 270 is disposed between the common electrode layer 280 and the color filter layer 130, wherein the protective layer 270 follows the color filter layer. 130 undulating and flexing. Therefore, in the present embodiment, the common electrode layer 280 is not formed on a flat surface, but is bent as the thickness of the color filter layer 130 changes.

It is worth mentioning that in the first embodiment, the second color filter patterns 134 are only protruded toward the first color filter pattern 132 to be located directly above the active element 142 of the first pixel region R1. However, in the second embodiment, the second color filter patterns 134 may simultaneously protrude toward the adjacent first color filter patterns 132 and the second color filter patterns 136. That is, the second color filter pattern 134 may have a second protrusion 134B in addition to the first protrusion 134A, wherein the second protrusion 134B overlaps the third color filter pattern 136. At this time, the color filter patterns closest to all of the active elements 142 are part of the second color filter pattern 134. The light ray L irradiated by the first substrate 110 toward each of the active elements 142 may be the same color light, which is a color light other than blue light. Thus, the photo-leakage current phenomena that may be produced by the semiconductor material in all active elements 142 are substantially the same, helping to maintain the active characteristics of each active element 142 after a period of operation. That is, the display panel 200 can have more stable component characteristics and display quality.

Of course, the present invention is not limited to the embodiment in which only the second color filter pattern is superposed on the first color filter pattern. 4 is a cross-sectional view showing a display panel according to a third embodiment of the present invention. Referring to FIG. 4, the display panel 300 is substantially identical to the display panel 100 of the first embodiment, and thus the same component symbols in the two embodiments will denote the same components. Specifically, the difference between the embodiment and the first embodiment is mainly that, in the display panel 300, the third color filter pattern 136 of the color filter layer 130 has a second protrusion 136A, which is configured by the third color filter. The light pattern 136 protrudes outward from the side S2 of the first color filter pattern 132, and the first protrusion 134A overlaps with the second protrusion 136A. That is, the first protrusion 134A and the second protrusion 136A are both overlapped with the first color filter pattern 132. The difference between the two manufacturing methods is only that in the embodiment, the third color filter pattern 136 is formed while the second protrusion portion 136A is formed, and the second protrusion portion 136A is stacked on the first protrusion portion 134A. on.

FIG. 5 is a cross-sectional view showing a display panel according to a fourth embodiment of the present invention. Referring to FIG. 5, the display panel 400 is substantially identical to the display panel 300, and thus the same component symbols in the two display panels 300 and 400 will denote the same components. However, the difference between this embodiment and the third embodiment is mainly that the first color filter pattern 132, the first protrusion 134A and the second protrusion 136A together form a spacer PS, and the spacer PS helps. The display medium layer 150 is maintained at a fixed thickness D.

Specifically, since the first color filter pattern 132, the first protruding portion 134A, and the second protruding portion 136A are overlapped, they constitute a distinct protruding structure, that is, the spacer PS. Therefore, if the thicknesses of the first color filter pattern 132, the first protrusion portion 134A, and the second protrusion portion 136A are appropriately adjusted, the end of the spacer PS away from the first substrate 110 can be abutted on the second substrate. The component on 120. At this time, the spacer PS may be used to support the first substrate 110 and the second substrate 120 such that the thickness D of the display medium layer 150 is maintained uniform.

Further, when the material of the display medium layer 150 is a liquid crystal material, the spacer PS may be used as an alignment protrusion. Further, in this embodiment, the second protruding portion 136A is in contact with the implementation of the active device 142. However, in other embodiments, the active device 142 may be covered by a protective layer (not shown). The second protrusion 136A is brought into contact with a protective layer (not shown). Alternatively, the spacer PS may be covered by another protective layer (not shown) to bring the two protective layers into contact. In other words, the present embodiment does not exclude an embodiment in which other members are disposed between the second protruding portion 136A and the active member 142.

6A-6C illustrate a process of fabricating a color filter layer in a display panel according to a fifth embodiment of the present invention. Referring first to FIG. 6A, a black matrix pattern 160 is formed on the first substrate 110. Similar to the first embodiment, the black matrix pattern 160 has a plurality of openings 162 to define a plurality of first pixel regions R1, a plurality of second pixel regions R2, and a plurality of third pixel regions R3. Further, the position of the lateral portion 164 of the black matrix pattern 160 corresponds to the position of the active component in the display panel.

Next, referring to FIG. 6B, a second color filter pattern 134 and a third color filter pattern 136 are formed on the black matrix pattern 160. In the present embodiment, the order in which the second color filter pattern 134 and the third color filter pattern 136 are formed is not particularly limited. However, in the present embodiment, the second color filter pattern 134 has a first protrusion 134A which is protruded from the side S1 of the second color filter pattern 134 adjacent to the first pixel region R1 and is located in the black matrix. The transverse portion 164 of the pattern 160.

Then, referring to FIG. 6C, a first color filter pattern 132 is formed in the first pixel region R1, wherein the first color filter pattern 132 does not overlap with the first protrusion portion 134A. Therefore, the first protrusion 134A divides the first color filter pattern 132 into a first portion 132A and a second portion 132B which are separated from each other, and the first portion 132A and the second portion 132B define two first portions respectively. Picture area R1. In this way, the color filter layer 130 of the fifth embodiment is completed.

7 and FIG. 8 are partial schematic views of a display panel according to a fifth embodiment of the present invention, wherein FIG. 7 corresponds to the line AA' of FIG. 6C, and FIG. 8 corresponds to the line B- of FIG. 6C. B'. Referring to FIG. 6C, FIG. 7 and FIG. 8, the display panel 500 is substantially the same as the display panel 100 of the first embodiment, and therefore the same components will be denoted by the same reference numerals. The main difference between the two embodiments is that in the display panel 500, the first color filter pattern 132 does not overlap the first protrusion 134A of the second color filter pattern 134. Therefore, there is no blue filter pattern (ie, the first color filter pattern 132) directly above the active device 142. When the light L is irradiated from the first substrate 110 toward the active element 142, it does not change into blue light, and the active light of the active element 142 due to the blue light can be prevented from being severe.

It should be noted that when the third color filter pattern 136 adopts the design of the third embodiment or the fourth embodiment, the third color filter pattern 136 will have the second protrusion 136A, wherein the second protrusion The portion 136A also does not overlap the first color filter pattern 132. Moreover, the first protruding portion 134A and the second protruding portion 136A may divide the first color filter pattern 132 into the first portion 132A and the second portion 132B that are separated from each other, and the first portion 132A and the second portion 132B respectively Two first pixel regions R1 are defined.

In summary, the present invention provides a color filter pattern of a non-blue filter pattern directly above the active device to shield the blue filter pattern or a blue filter pattern directly above the active device. Therefore, the light that is irradiated onto the active element by the external light and the light that is irradiated onto the active element by the front light source or the light source is reflected by the element on the first substrate is not blue light. The active component is not prone to severe light leakage current, so the display panel has stable component characteristics. In addition, the present invention can adjust the layout of the color filter patterns such that the color filter patterns directly above all the active elements are of a color other than blue. At this time, after all the active components are operated for a period of time, the light leakage current conditions that may be generated may be substantially the same, and the display panel has stable component characteristics and an ideal display quality.

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 can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100~500. . . Display panel

110. . . First substrate

120. . . Second substrate

130. . . Color filter layer

132. . . First color filter pattern

132A. . . first part

132B. . . Second part

134. . . Second color filter pattern

134A. . . First projection

134B, 136A. . . Second projection

136. . . Third color filter pattern

140. . . Active component array

142. . . Active component

150. . . Display media layer

160. . . Black matrix pattern

162. . . Opening

164. . . Lateral part

170. . . Flat layer

180, 280. . . Common electrode layer

270. . . The protective layer

A-A’, B-B’. . . Section line

D. . . thickness

L. . . Light

PS. . . Interstitial

R1. . . First pixel area

R2. . . Second pixel area

R3. . . Third pixel area

S1, S2. . . One side

1 is a cross-sectional view showing a display panel according to a first embodiment of the present invention.

2A to 2D illustrate a process of fabricating a color filter layer and a black matrix pattern in a display panel according to a first embodiment of the present invention.

3 is a cross-sectional view showing a display panel according to a second embodiment of the present invention.

4 is a cross-sectional view showing a display panel according to a third embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a display panel according to a fourth embodiment of the present invention.

6A-6C illustrate a process of fabricating a color filter layer in a display panel according to a fifth embodiment of the present invention.

7 and FIG. 8 are partial schematic views of a display panel according to a fifth embodiment of the present invention, wherein FIG. 7 corresponds to the line AA' of FIG. 6C, and FIG. 8 corresponds to the line B- of FIG. 6C. B'.

100. . . Display panel

110. . . First substrate

120. . . Second substrate

130. . . Color filter layer

132. . . First color filter pattern

134. . . Second color filter pattern

134A. . . First projection

136. . . Third color filter pattern

140. . . Active component array

142. . . Active component

150. . . Display media layer

160. . . Black matrix pattern

164. . . Lateral part

170. . . Flat layer

180. . . Common electrode layer

L. . . Light

R1. . . First pixel area

R2. . . Second pixel area

S1. . . One side

Claims (12)

A display panel includes: a first substrate; a second substrate opposite to the first substrate; a color filter layer disposed on the first substrate, the color filter layer including an adjacent first color a filter pattern and a second color filter pattern, the second color filter pattern having a first protrusion protruding outward from a side of the second color filter pattern adjacent to the first color filter pattern The first color filter pattern is a blue filter pattern; an active device array includes a plurality of active elements disposed on the second substrate, wherein the first color filter pattern and the second color filter The light patterns respectively define at least one first pixel region and at least one second pixel region, and the first pixel region and the second pixel region are respectively driven by one of the active elements, and the second color The first protrusion of the filter pattern is located directly above the active component driving the first pixel region; and a display dielectric layer is disposed between the color filter layer and the active device array. The display panel of claim 1, wherein the first color filter pattern overlaps the first protrusion, and the first color filter pattern is located at the first protrusion and the first substrate between. The display panel of claim 1, wherein the first color filter pattern does not overlap the first protrusion, and the first protrusion divides the first color filter pattern into two a first portion and a second portion, and the first portion and the second portion define two first pixel regions, respectively. The display panel of claim 1, wherein the second color filter pattern is a red filter pattern or a green filter pattern. The display panel of claim 1, wherein the color filter layer further comprises a third color filter pattern adjacent to the first color filter pattern, and the first color filter pattern is located Between the second color filter pattern and the third color filter pattern. The display panel of claim 5, wherein the third color filter pattern has a second protrusion, and the third color filter pattern is adjacent to the side of the first color filter pattern. Protruding, and the second protrusion overlaps the first protrusion. The display panel of claim 6, wherein the first protrusion and the second protrusion overlap the first color filter pattern. The display panel of claim 7, wherein the first color filter pattern, the first protrusion and the second protrusion together form a spacer, the spacer maintains the display medium layer A fixed thickness. The display panel of claim 6, wherein the first protrusion and the second protrusion do not overlap the first color filter pattern, and the first protrusion and the second The protrusion divides the first color filter pattern into a first portion and a second portion separated from each other, and the first portion and the second portion respectively define two first pixel regions. The display panel of claim 1, further comprising a black matrix pattern disposed on the first substrate between the color filter layer and the first substrate, the black matrix pattern being the first The pixel region and the second pixel are separated and located directly above the active components. The display panel of claim 1, further comprising a common electrode layer disposed on the first substrate between the color filter layer and the display medium layer. The display panel of claim 10, further comprising a flat layer disposed between the common electrode layer and the color filter layer.