TWI493266B - Pixel structure - Google Patents

Pixel structure Download PDF

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Publication number
TWI493266B
TWI493266B TW102113496A TW102113496A TWI493266B TW I493266 B TWI493266 B TW I493266B TW 102113496 A TW102113496 A TW 102113496A TW 102113496 A TW102113496 A TW 102113496A TW I493266 B TWI493266 B TW I493266B
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TW
Taiwan
Prior art keywords
pixel
pixel electrode
data line
electrode
scan line
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Application number
TW102113496A
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Chinese (zh)
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TW201333609A (en
Inventor
Wei Yuan Cheng
Chin An Tseng
Yen Heng Huang
Chia Hui Pai
Chung Kai Chen
Wen Hsien Tseng
Ting Yi Cho
Chia Yu Lee
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Au Optronics Corp
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Priority to TW102113496A priority Critical patent/TWI493266B/en
Publication of TW201333609A publication Critical patent/TW201333609A/en
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Publication of TWI493266B publication Critical patent/TWI493266B/en

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Description

Pixel structure

The present invention relates to a pixel structure, and more particularly to a pixel structure that can improve display quality.

The market's performance requirements for liquid crystal display panels are toward high contrast ratio, no gray scale inversion, little color shift, high luminance, and high color richness. High color saturation, fast response and wide viewing angle. At present, technologies capable of achieving wide viewing angles include twist nematic (TN) liquid crystals, wide viewing film, in-plane switching (IPS) liquid crystal display panels, and marginal fields. A switching type of liquid crystal display panel, a multi-domain vertical alignment (MVA) liquid crystal display panel, and the like.

The conventional multi-domain vertical alignment liquid crystal display panel utilizes an alignment structure configuration to allow liquid crystal molecules in different regions to be tilted at different angles to achieve a wide viewing angle. The alignment structure includes an alignment protrusion and an alignment slit disposed on the electrode Slit). However, the tilting direction of the liquid crystal molecules around the alignment bump and the alignment slit is often discrination, which causes light leakage or black streaking, which further reduces the display contrast of the liquid crystal display panel. If the light shielding layer corresponding to the alignment bump or the alignment slit is disposed in order to shield the light leakage or the black streak phenomenon, the display aperture ratio is limited.

Therefore, how to strike a balance between the wide viewing angle requirement of the pixel structure and the aperture ratio is one of the problems that need to be overcome to improve the display quality of the pixel structure.

The present invention provides a pixel structure having a high aperture ratio.

The present invention provides a pixel structure which can reduce discontinuity during display and obtain good display quality.

The present invention provides a pixel structure including a substrate, a scan line, a first data line, and a first pixel unit. The scan line and the first data line are disposed on the substrate. The first pixel unit includes a first active element and a first pixel electrode. The first active component is electrically connected to the scan line and the first data line. The first pixel electrode is electrically connected to the first active element, and the first pixel electrode has a stripe pattern of a substantially parallel scan line and a plurality of branches electrically connected to the strip pattern, and one side of the strip pattern extends The branches of the scan lines are connected, and the other side of the strip pattern partially overlaps the scan lines, wherein the overlap width of the strip patterns and the scan lines is 40% to 90% of the width of the strip pattern.

In an embodiment of the invention, the branch and the first data line are, for example, The projections on the substrate are separated from one another and the first pixel electrode has a spacing from the first data line.

In an embodiment of the invention, the first pixel electrode further has a trunk portion and a stem portion, the trunk portion is parallel to the first data line, the branch portion is parallel to the scan line, and the trunk portion and the branch portion are the first pixel unit Divided into four fields, the intersection of the branch autonomous cadre and the branch portion extends around, wherein the branches in each field are substantially parallel to each other.

In an embodiment of the present invention, the first pixel unit may further include a storage capacitor structure, wherein the storage capacitor structure includes a lower capacitor electrode and an upper capacitor electrode, wherein the upper capacitor electrode is located above the lower capacitor electrode, and the upper capacitor electrode is coupled to the capacitor electrode The pixel electrode is the same film layer, the trunk portion is separated from the upper capacitor electrode, and the upper capacitor electrode is connected to the first pixel electrode through one of the branches adjacent to the data line.

In an embodiment of the present invention, the pixel structure may further include a color filter layer between the first active component and the first pixel electrode, and the color filter layer has an opening substantially in the first drawing. The first pixel electrode at the intersection of the trunk portion and the branch portion of the element electrode is electrically connected to the first active element via the opening. At this time, the first pixel unit may further include a contact pattern at an intersection of the trunk portion and the branch portion, and is connected to a drain of the first active element, and the first pixel electrode is connected to the contact pattern via the opening. And the first pixel electrode covers the contact pattern, for example, in a full-field type. Alternatively, the partial branches and the contact patterns are, for example, at least partially overlapped.

In an embodiment of the present invention, the pixel structure may further include a second pixel unit and a second data line, where the second pixel unit includes a second active element and The second pixel electrode. The second active component is electrically connected to the scan line. The second pixel electrode is electrically connected to the second active component, the second pixel electrode has a plurality of branches, and the branch extends above the first data line and the second data line and spans the data line.

In an embodiment of the invention, the first pixel unit and the second pixel unit are located between the first data line and the second data line, for example.

In an embodiment of the invention, the second pixel electrode further has a stripe pattern of a substantially parallel scan line, and one side of the strip pattern of the second pixel electrode and the second pixel extending from the scan line The branches of the electrodes are connected while the other side of the strip pattern of the second pixel electrode partially overlaps the scan line. In detail, the overlapping width of the stripe pattern of the second pixel electrode and the scanning line is 40% to 90% of the width of the stripe pattern of the second pixel electrode.

In an embodiment of the invention, the branch of the first pixel electrode and the projection of the adjacent data lines on the substrate are separated from each other, and the first pixel electrode has a spacing between the adjacent data lines. Specifically, the above range is substantially from 1.5 micrometers to 15 micrometers.

The present invention provides a pixel structure including a substrate, a scan line, a first data line, a second data line, a first pixel unit, and a second pixel unit. The scan line, the first data line, and the second data line are disposed on the substrate. The first pixel unit is located between the first data line and the second data line, and the first pixel unit includes a first active element and a first pixel electrode. The first active component is electrically connected to the scan line and the first data line. The first pixel electrode is electrically connected to the first active element, and the first pixel electrode has a plurality of branches extending from the center of the first pixel structure to the periphery, the branch and the phase The projection ranges of the adjacent data lines on the substrate are separated from each other, and there is a space between the first pixel electrodes and the adjacent data lines. The second pixel unit is located between the first data line and the second data line, and the second pixel unit includes a second active element and a second pixel electrode. The second active component is electrically connected to the scan line and the second data line. The second pixel electrode is electrically connected to the second active component, the second pixel electrode has a plurality of branches, and the branch extends above the first data line and the second data line and spans the data line.

In an embodiment of the invention, the pixel structure further includes a color filter layer between the first active device and the first pixel electrode, and the second active device and the second pixel electrode. between.

The invention provides a pixel structure comprising a substrate, a scan line, a first data line, a first pixel unit and a color filter layer. The scan line and the first data line are disposed on the substrate. The first pixel unit is located between the first data line and the second data line, and the first pixel unit includes a first active element and a first pixel electrode. The first active component is electrically connected to the scan line and the first data line. The first pixel electrode is electrically connected to the first active element, and the first pixel electrode has a plurality of branches, a trunk portion and a branch portion, wherein the trunk portion is parallel to the data line, and the intersection of the branch autonomous stem portion and the branch portion is surrounding Extending, where the branches in each field are substantially parallel to each other. The color filter layer is located between the first active component and the first pixel electrode, and the color filter layer has an opening substantially at the intersection of the trunk portion and the branch portion of the first pixel electrode through the opening and the first pixel electrode The first active component is electrically connected.

In an embodiment of the invention, the first pixel structure further includes a contact pattern located at an intersection of the trunk portion and the branch portion, and is coupled to the first active component A drain is connected, and the first pixel electrode is connected to the contact pattern via the opening, and the first pixel electrode covers the contact pattern in a full-field pattern.

In an embodiment of the invention, the first pixel structure further includes a contact pattern at an intersection of the trunk portion and the branch portion, and a drain of the first active component is connected in the first pixel unit. The first pixel electrode is connected to the contact pattern via the opening, and the partial branch at least partially overlaps the contact pattern.

The present invention provides a pixel structure including a substrate, a scan line, a first data line, and a first pixel unit. The scan line and the first data line are disposed on the substrate. The first pixel unit is located between the first data line and the second data line, and the first pixel unit includes a first active element, a first pixel electrode, and a storage capacitor structure, wherein the first active element and the scan line are One and one of the data lines are electrically connected. The first pixel electrode is electrically connected to the first active element, and the first pixel electrode has a plurality of branches, a trunk portion and a branch portion, wherein the trunk portion is parallel to the data line, and the intersection of the branch autonomous stem portion and the branch portion is surrounding Extending, where the branches in each field are substantially parallel to each other. The storage capacitor structure includes a lower capacitor electrode and an upper capacitor electrode, wherein the upper capacitor electrode is located above the lower capacitor electrode, wherein the upper capacitor electrode and the first pixel electrode are the same film layer, the trunk portion is separated from the upper capacitor electrode, and the upper capacitor electrode is transparent A branch adjacent to the periphery of the data line is connected to the first pixel electrode.

Based on the above, by appropriately controlling the proportional relationship between the stripe pattern of the pixel electrodes in the pixel structure and the overlapping width of the scanning lines, the light leakage phenomenon of the pixel structure during display can be reduced, and the aperture ratio can be improved. In an embodiment, the pixel structure can be suppressed by controlling the design pattern of the pixel electrode near the opening of the color filter layer. In the case of display, the liquid crystal molecules are dumped in a direction where they are discriminated. In one embodiment, since the upper capacitor electrode is connected to the pixel electrode through a branch adjacent to the periphery of the data line, a better display quality can be obtained. In addition, in another embodiment, a better display quality can be obtained by extending the branch of the pixel electrode of the second pixel unit of the pixel structure over the adjacent data lines and across the data lines. Therefore, by the above means, when the pixel structure of the present invention is used for display, the black streaks appearing in various regions of the pixel structure can be eliminated, the light leakage, the aperture ratio can be improved, and the disclination can be suppressed. Provides a high quality display.

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

200, 300, 400, 500‧‧‧ pixel structure

202‧‧‧Substrate

210‧‧‧ scan line

220‧‧‧First data line

230A, 330A, 530A‧‧‧ first pixel unit

232A‧‧‧First active component

232D‧‧‧Bungee

234A‧‧‧first pixel electrode

240‧‧‧ strip pattern

One side of the 240S1, 240S2‧‧‧ strip pattern

242‧‧‧ branch

250‧‧‧Color filter layer

260‧‧‧ Storage Capacitor Structure

260B‧‧‧lower capacitor electrode

260U‧‧‧upper capacitor electrode

280, 430‧ ‧ slit

310‧‧‧Main Department

320‧‧‧ Branch

410‧‧‧Contact pattern

520‧‧‧Second data line

530B‧‧‧Second pixel unit

532B‧‧‧Second active component

534B‧‧‧Second pixel electrode

H‧‧‧ openings

L‧‧‧ protruding amount

S‧‧‧ spacing

P‧‧‧Photo District

R1, R2, R3, R4‧‧‧ fields

W1‧‧‧ overlap width

W2‧‧‧Unoverlapping width is

W‧‧‧ width of strip pattern

X‧‧‧ intersection

1 is a schematic view showing a pixel structure of a first embodiment of the present invention.

2A is a partial enlarged view of the pixel structure of FIG. 1.

2B is a schematic cross-sectional view of FIG. 2A.

3 is a partially enlarged schematic view showing a pixel structure of a second embodiment of the present invention.

4A is a top view of a pixel structure in a third embodiment of the present invention.

4B is a partially enlarged schematic view showing the pixel structure of FIG. 4A.

FIG. 5A is a partially enlarged schematic view showing the first pixel electrode of the pixel structure of FIG. 4A electrically connected to the first active device via the opening of the color filter layer. FIG.

FIG. 5B is another partially enlarged schematic view showing the first pixel electrode of the pixel structure of FIG. 4A electrically connected to the first active device via the opening of the color filter layer. FIG.

Fig. 6 is a top view of a pixel structure according to a fourth embodiment of the present invention and a partially enlarged schematic view thereof.

7A and 7B are schematic cross-sectional views of the AA section line and the BB section line along the pixel structure of Fig. 6, respectively.

8A and FIG. 8B are respectively partially enlarged schematic views and cross-sectional views of another pixel structure illustrated in FIG. 6.

The invention provides a pixel structure, which is suitable for the pixel material to be easily cloaked when the pixel structure is displayed, and the improvement of each component member, such as the design state and pixel of the pixel electrode, is performed one by one. The arrangement relationship between the electrode and the scanning line, the arrangement relationship between the pixel electrode of the main pixel unit and the sub-pixel unit, and the data line, the connection relationship between the upper capacitor electrode and the pixel electrode, or the pixel electrode The design pattern near the opening of the color filter layer, etc., through the relative relationship between the components in the pixel structure or the design aspect of the stack, so as to discloat the phenomenon that may appear on the display screen. Once eliminated, the effect of reducing light leakage, increasing aperture ratio, and improving display quality is achieved. The following will list some examples separately. The figure shows the pixel structure of the present invention in detail.

First embodiment

1 is a schematic view showing a pixel structure of a first embodiment of the present invention. Referring to FIG. 1 , the pixel structure 200 is disposed on a substrate 202 to define a plurality of pixel regions P on the substrate 202 . In order to clearly illustrate related components in the pixel structure 200 , only FIG. 1 is schematically illustrated. The pixel structure 200 located in one pixel area P is shown as a representative.

Referring to FIG. 1 , the pixel structure 200 includes a scan line 210 , a first data line 220 , and a first pixel unit 230A disposed on the substrate 202 . In the present embodiment, the first pixel unit 230A includes a first active element 232A and a first pixel electrode 234A, wherein the first active element 232A is electrically connected to the scan line 210 and the first data line 220. The first pixel electrode 234A is electrically connected to the first active element 232A. The first pixel electrode 234A has a stripe pattern 240 of a substantially parallel scan line 210 and a plurality of branches 242 electrically connected to the strip pattern 240. One side 240S1 of the pattern 240 is connected to the branch 242 extending over the scan line 210, and the other side 240S2 of the strip pattern 240 partially overlaps the scan line 210, in particular, the overlap width of the strip pattern 240 and the scan line 210. It is 40% to 90% of the width of the strip pattern 240. Thereby, the display of the pixel structure 200 can be improved.

In detail, FIG. 2A is a partial enlarged view of A in the pixel structure of FIG. 1, and FIG. 2B is a schematic cross-sectional view of FIG. 2A. Referring to FIGS. 2A and 2B, a slit 280 is formed between the branches 242 of the first pixel electrode 234A. As shown in FIGS. 2A and 2B, the overlap width of the strip pattern 240 and the scan line 210 is W1, and the strip pattern 240 The width W2 of the strip pattern 240 is the sum of W1 and W2. In this embodiment, the overlap width W1 of the strip pattern 240 and the scan line 210 is a strip pattern. 40% to 90% of the width W of 240, wherein the overlapping width W1 of the strip pattern 240 and the scanning line 210 is, for example, substantially 1.5 um to 3.5 um. When the pixel structure 200 is applied to an ultra high aperture design, a preferred ratio of W1 to W2 is 4 to 1, that is, W1/W is, for example, 80%, which can sufficiently reduce light leakage. On the other hand, when the pixel structure 200 is applied to a color filter film directly integrated on a thin film transistor array substrate (COA) or a black matrix fabricated on a thin film transistor array substrate (Black matrix on Array, BOA) In the design, when the ratio of W1 to W2 is 1 to 1, that is, W1/W is, for example, 50%, the light leakage phenomenon can be sufficiently reduced, and the display quality is improved.

For example, a color filter film is directly integrated into a thin film transistor array substrate, and FIG. 2B is a schematic cross-sectional view taken along line BB' of FIG. 2A. Referring to FIG. 2B , the pixel structure 200 further includes a color filter layer 250 , wherein the color filter layer 250 is located between the first pixel electrode 234A and the scan line 210 . The overlapping width W1 of the stripe pattern 240 and the scanning line 210 and the width W2 of the stripe pattern 240 not overlapping the scanning line 210 are, for example, 2.5 micrometers, respectively. In addition, as shown in FIG. 1 , in the embodiment, the projections of the branch 242 and the first data line 220 on the substrate 202 are separated from each other, and the first pixel electrode 234A and the first data are separated from each other. Line 220 has a spacing S wherein the spacing S ranges from at least 3 microns, preferably from 3 microns to 9 microns, for example.

Therefore, the pixel structure 200 of the first embodiment of the present invention is configured to appropriately reduce the light leakage, increase the aperture ratio, and enhance the display by appropriately controlling the proportional relationship between the overlap width W1 of the strip pattern 240 and the scan line 210 and the width of the strip pattern 240. The effect of quality.

Of course, the designer can also use the pixel structure of the first embodiment according to the actual needs of the product and use some or all of the techniques of the following embodiments to further enhance the display effect of the pixel structure for display. Alternatively, the designer may select only one of the following embodiments, that is, the effect of improving ambiguity during display and improving display quality.

Second embodiment

3 is a partially enlarged schematic view showing a pixel structure of a second embodiment of the present invention. Referring to FIG. 3, in the pixel structure 300 of the embodiment, the first pixel unit 330A is similar to the first pixel unit 230A of the first embodiment, but the first pixel unit 330A of the embodiment further includes a The storage capacitor structure 260.

Specifically, as shown in FIG. 3, the first pixel electrode 234A has a stem portion 310 parallel to the first data line 220 and a branch portion 320 parallel to the scan line 210. The trunk portion 310 and the branch portion 320 divide the first pixel unit 330A into four domains R1, R2, R3, and R4, and the intersections of the plurality of branches 242 the autonomous stem portion 310 and the branch portion 320 extend around, and divide the pixel unit. There are four fields R1, R2, R3, R4, and the branches 242 in each of the fields R1, R2, R3, R4 are substantially parallel to each other. When the pixel structure 300 is used for display, the liquid crystal molecules located above the first pixel unit 330A can be dumped in different directions in four different directions. And achieve a wide viewing angle display effect. Of course, the present invention is not used to limit the number of fields R1, R2, R3, and R4 that each pixel unit is divided, and the shape and number of the trunk portion 310 of the first pixel electrode 234A and the branch portion 320 can be designed according to product requirements. .

It should be noted that the pixel structure 300 of this embodiment may further include a storage capacitor structure 260, wherein the storage capacitor structure 260 includes a lower capacitor electrode 260B and an upper capacitor electrode 260U. From the top view, the first pixel electrode 234A is located between the lower capacitor electrode 260B and the scan line 210. Moreover, as shown in FIG. 3, the upper capacitor electrode 260U is located above the lower capacitor electrode 260B, wherein the upper capacitor electrode 260U and the first pixel electrode 234A are the same film layer, that is, the upper capacitor electrode 260U and the first pixel electrode 234A may be It consists of the same material and can be produced through the same mask process. It is to be noted that, since the junction between the trunk portion 310 and the upper capacitor electrode 260U is relatively ambiguous on the display screen, in the present embodiment, as shown in FIG. 3, the trunk portion 310 and the upper capacitor electrode 260U are used. Separating, as shown in Figure B, and the upper capacitor electrode 260U is connected to the first pixel electrode 234A through a branch 242 adjacent to the periphery of the data line, as shown in Figure C, in other words, the upper capacitor electrode 260U and the The junction of the one pixel electrode 234A is located at a corner of the first pixel electrode 234A. Therefore, a better display effect can be obtained when the pixel structure 300 is used for display.

It is worth mentioning that, in this embodiment, the pixel structure 300 mainly utilizes an appropriate connection relationship between the pixel electrode in the pixel unit and the capacitor electrode 260U on the storage capacitor structure 260 to reduce light leakage and increase aperture ratio. And the effect of improving display quality. Although in the pixel structure 300 of the present embodiment, the second embodiment is The technique is described in the same manner as in the first embodiment. However, the designer can separately use the upper capacitor electrode 260U to connect to the pixel electrode through the branch 242 adjacent to the periphery of the data line to eliminate the display. The ambiguity and the effect of improving the display quality, the present invention does not limit the pixel structure to be matched with the strip pattern of the first embodiment, depending on the product requirements.

Third embodiment

4A is a top view of a pixel structure in a third embodiment of the present invention, and FIG. 4B is a partially enlarged schematic view of the pixel structure of FIG. 4A. Referring to FIG. 4A and FIG. 4B, the pixel structure 400 of the present embodiment is similar to the foregoing embodiment, but the first pixel unit 430A of the pixel structure 400 of the embodiment further includes a first active component 232A and a first The color filter layer 250 between the pixel electrodes 234A, for clarity of illustration, separates the color filter layer 250 from the left side of FIG. 4A and is separately depicted on the right side of FIG. 4A.

Referring to FIG. 4A and FIG. 4B , in the embodiment, the pixel structure 400 belongs to the pixel structure 400 in which the color filter film is directly integrated into the thin film transistor array substrate. As shown in FIG. 4A and FIG. 4B, the color filter layer 250 has an opening H which is substantially located at the intersection X of the trunk portion 310 of the first pixel electrode 234A and the branch portion 320, and the first pixel electrode 234A is The first active element 232A is electrically connected to the first active element 232A via the opening H. In more detail, the first pixel electrode 234A is electrically connected to the contact pattern 410 located at the intersection X of the trunk portion 310 and the branch portion 320 via the opening H.

For clarity of explanation, the following description will be made in detail by partially amplifying the intersection X of the trunk portion 310 and the branch portion 320.

More specifically, FIG. 5A is the first pixel electrode in the pixel structure of FIG. 4A. A partially enlarged schematic view electrically connected to the first active component via the opening of the color filter layer. Referring to FIG. 5A and FIG. 4A, the first pixel unit 430A may further include a contact pattern 410 at the intersection X of the trunk portion 310 and the branch portion 320, wherein the contact pattern 410 is connected to the drain 232D of the first active device 232A. In detail, the contact pattern 410 is, for example, a pattern extending from the drain 232D of the first active device 232A to below the opening H of the color filter layer 250, and the first pixel electrode 234A is via the opening H and the contact pattern 410. In connection, in particular, the first pixel electrode 234A covers the contact pattern 410 in a full-field pattern. In more detail, the so-called full-field type means that the projection of the first pixel electrode 234A on the substrate 202 covers the contact pattern 410, and as shown in FIG. 5A, the first pixel electrode 234A is covered by the entire pattern. Above the contact pattern 410. When viewing the pixel structure 400 from the top view, the contact pattern 410 is located within the coverage of the first pixel electrode 234A, and the edge of the contact pattern 410 is still spaced apart from the slit of the first pixel electrode 234A by a distance D, Wherein the spacing D is, for example, between 1 micrometer and 6 micrometers.

Of course, the first pixel electrode is electrically connected to the first active device via the opening of the color filter layer, except for the type shown in FIG. 5A, or the layout pattern shown in FIG. 5B, and FIG. 5B depicts Another partially enlarged schematic view of the first pixel electrode in the prime structure electrically connected to the first active device via the opening of the color filter layer. Referring to FIG. 5B, in particular, a portion of the branch 242 of the first pixel electrode 234A and the contact pattern 410 are at least partially disposed. In more detail, as shown in FIG. 5B, a portion of the branch 242 of the first pixel electrode 234A extends above the contact pattern 410 such that the slit 430 formed between the branches 242 is directly in the contact pattern. Above the 410. It is worth mentioning that the branch 242 of the first pixel electrode 234A is disposed substantially in the vicinity of the opening H of the color filter layer 250 as shown in FIG. 5A or FIG. 5B, and may easily occur in the color filter layer 250 ( The ambiguity at the junction of the opening H and the first pixel electrode 234A shown in FIG. 4B) is sufficiently eliminated, so that it is reduced to an extent that the observer cannot discern, or is completely eliminated, so that the pixel structure 400 can be used for display. Improve better display quality.

It should be noted that although the pixel structure 400 of the embodiment is described in the same manner as the technology of the foregoing embodiment, the designer can separately control the pixel by using the embodiment according to the product requirements. The design of the electrode in the vicinity of the opening of the color filter layer achieves the effect of eliminating ambiguity during display and improving display quality, and the invention is not limited thereto.

Fourth embodiment

Fig. 6 is a top view of a pixel structure according to a fourth embodiment of the present invention and a partially enlarged schematic view thereof. Referring to FIG. 6, in the embodiment, the pixel structure 500 is in addition to the foregoing scan lines, first data lines, and first pixel units. In the embodiment, the pixel structure 500 further includes a second pixel unit 530B and a second data line 520. As shown in FIG. 6, the pixel structure 500 includes a first pixel unit 530A and a second pixel unit 530B. The first pixel unit 530A and the second pixel unit 530B are located between the first data line 220 and the second data line 520. In detail, in the pixel structure 500, the second active component 532B and the first active component 232A are electrically connected to the same scan line 210, and the second active component 532B and the first active component 232A are electrically connected respectively. Different data lines.

Referring to FIG. 6, the second pixel unit 530B includes a second active element 532B and a second pixel electrode 534B, wherein the second active element 532B is electrically connected to the scan line 210, and in this embodiment, the second active element 532B The second data line 520 is electrically connected to the second data element 520, but the second pixel element 534B is electrically connected to the second active element 532B. In particular, as shown in the enlarged view, the second pixel electrode 534B has a plurality of branches 242, and the branches 242 extend above the first data line 220 and the second data line 520 and across the data line.

In more detail, FIG. 7A and FIG. 7B are schematic cross-sectional views of the AA section line and the BB section line along the pixel structure of FIG. 6, respectively. Referring to FIG. 7A, in the first pixel unit 530A of the embodiment, the projections 242 of the first pixel electrode 234A and the projection lines of the first data line 220 on the substrate 202 are separated from each other, and the first pixel electrode is separated. 234A has a spacing S from the first data line 220, and the spacing S ranges from at least 3 micrometers, preferably from 3 micrometers to 9 micrometers. Next, referring to FIG. 7B, in the second pixel unit 530B, the second pixel electrode 534B has a plurality of branches 242, and the branch 242 extends above the first data line 220 and the second data line 520 and spans the data line. In other words, the branch 242 of the second pixel electrode 534B extends from one side above the second data line 520 to the opposite side above the data line. In one embodiment, the branch 242 of the second pixel electrode 534B is from the second data. The amount of protrusion L of the line 520 is, for example, 2 micrometers.

It is worth mentioning that when the pixel structure 500 of the embodiment is applied for display, the first pixel unit 530A serves as a main display unit, and the second pixel unit 530B serves as a secondary display unit, so that the second pixel can be eliminated. Pixel electrode 534B adjacent The ambiguity at the data line is reduced to the extent that the observer cannot discern, or is completely eliminated. It is worth mentioning that the second pixel unit 530B is used as a secondary display unit, and its operation gray scale is usually low, so even if the branch 242 of the second pixel electrode 534B crosses the second data line 520, there is no signal interference. Doubt, in other words, has a better display quality when displayed in this pixel structure 500.

Although the pixel structure 500 of the present embodiment is described in the same manner as the technology of the foregoing embodiment, the designer can separately adopt the second drawing of the second pixel unit according to the product requirement. The branch of the element electrode extends over the adjacent data line and spans the data lines to achieve an effect of eliminating ambiguity during display and improving display quality. The invention is not limited thereto.

Of course, the second pixel electrode 534B of the present embodiment can adopt the configuration of the first pixel electrode 234A described in the first embodiment to further eliminate ambiguity during display. In detail, Fig. 8A is a partially enlarged schematic view showing another structure of the pixel structure shown in Fig. 6; and Fig. 8B is a schematic cross-sectional view taken along line BB' of Fig. 8A. Referring to FIGS. 8A and 8B, a slit 430 is formed between the branches 242 of the second pixel electrode 534B. As shown in FIG. 8A and FIG. 8B, the second pixel electrode 534B may also have a strip pattern 240 of a substantially parallel scan line 210 (shown in FIG. 6). In this embodiment, the second pixel electrode 534B One side of the strip pattern 240 may be connected to the branch 242 of the second pixel electrode 534B extending through the scan line 210, and the other side of the strip pattern 240 of the second pixel electrode 534B partially overlaps the scan line 210. In detail, the overlapping width of the stripe pattern 240 of the second pixel electrode 534B and the scanning line 210 is 40% to 90% of the width of the stripe pattern 240 of the second pixel electrode 534B, wherein the strip shape The overlap width W1 of the pattern 240 and the scan line 210 is substantially 1.5 um to 15 um. In other words, the overlapping width of the strip pattern 240 and the scanning line 210 is W1, and the width of the strip pattern 240 not overlapping the scanning line 210 is W2, wherein the width W of the strip pattern 240 is the sum of W1 and W2. When the pixel structure 500 is applied to an ultra high aperture design, a preferred ratio of W1 to W2 is 4 to 1, which can sufficiently reduce light leakage. On the other hand, when the pixel structure 500 is applied to a color filter film directly integrated on a thin film transistor array substrate (COA) or a black matrix fabricated on a thin film transistor array substrate (Black matrix on Array, BOA) In the design, when the ratio of W1 to W2 is 1 to 1, the light leakage phenomenon can be sufficiently reduced, and the display quality is improved. In one embodiment, the overlapping width W1 of the strip pattern 240 and the scan line 210 and the width W2 of the strip pattern 240 not overlapping the scan line 210 are, for example, 2.5 microns, respectively.

In summary, the pixel structure of the present invention has at least one or all of the following advantages:

(1) The present invention can reduce the light leakage phenomenon of the pixel structure during display by appropriately controlling the proportional relationship between the strip pattern of the pixel electrode and the overlap width of the scanning line in the pixel structure, thereby increasing the aperture ratio.

(2) The present invention can suppress the phenomenon that the liquid crystal molecules are dumped in the direction of the pixel when the pixel structure is used for display by controlling the design pattern of the pixel electrode in the vicinity of the opening of the color filter layer. .

(C) The capacitor electrode of the present invention is connected to the first pixel electrode through a branch adjacent to the periphery of the data line, thereby suppressing the pixel structure for display At this time, the phenomenon in which the liquid crystal molecules are dumped in the direction of disclination is obtained, thereby obtaining better display quality.

(4) The present invention extends the branch of the pixel electrode of the second pixel unit of the pixel structure to the upper side of the adjacent data line and spans the data lines, thereby suppressing the liquid crystal molecules when the pixel structure is used for display The phenomenon of dumping in the direction of disclination provides a high-quality display.

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.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

202‧‧‧Substrate

210‧‧‧ scan line

220‧‧‧First data line

232A‧‧‧First active component

234A‧‧‧first pixel electrode

242‧‧‧ branch

310‧‧‧Main Department

320‧‧‧ Branch

500‧‧‧ pixel structure

520‧‧‧Second data line

530A‧‧‧ first pixel unit

530B‧‧‧Second pixel unit

532B‧‧‧Second active component

534B‧‧‧Second pixel electrode

L‧‧‧ protruding amount

Claims (11)

  1. A pixel structure includes: a substrate; a scan line and a first data line disposed on the substrate; and a first pixel unit, the first pixel unit including: a first active component, and the The scan line and the first data line are electrically connected; a first pixel electrode is electrically connected to the first active element, and the first pixel electrode has a strip pattern substantially parallel to the scan line and the strip a plurality of branches electrically connected to each other, one side of the strip pattern being connected to the branches extending over the scan line, and the other side of the strip pattern partially overlapping the scan line, wherein the strip pattern The overlap width with the scan line is 40% to 90% of the width of the strip pattern, and the first pixel electrode further has a trunk portion and a portion, the stem portion being parallel to the first data line, The branch is parallel to the scan line, and the stem portion and the branch divide the first pixel unit into four fields, and the branches extend from the intersection of the trunk portion and the branch portion, wherein each field The branches are substantially parallel to each other; And a color filter layer between the first active component and the first pixel electrode, the color filter layer having an opening substantially at the intersection of the trunk portion of the first pixel electrode and the branch portion The first pixel electrode is electrically connected to the first active device via the opening.
  2. The pixel structure of claim 1, wherein the projections of the branches and the first data line on the substrate are separated from each other, and the first pixel electrode There is a distance from the first data line.
  3. The pixel structure of claim 1, wherein the first pixel unit further comprises a storage capacitor structure, the storage capacitor structure comprises: a lower capacitor electrode; and an upper capacitor electrode, located above the lower capacitor electrode The upper capacitor electrode and the first pixel electrode are the same film layer, the trunk portion is separated from the upper capacitor electrode, and the upper capacitor electrode passes through one of the branches adjacent to the data line and the first The pixel electrode is connected.
  4. The pixel structure of claim 1, wherein the first pixel unit further comprises a contact pattern at an intersection of the trunk portion and the branch portion, and is connected to a drain of the first active component. And the first pixel electrode is connected to the contact pattern via the opening, and the first pixel electrode covers the contact pattern in a full-field pattern.
  5. The pixel structure of claim 1, wherein the first pixel unit further comprises a contact pattern at an intersection of the trunk portion and the branch portion, and is connected to a drain of the first active component. In the first pixel unit, the first pixel electrode is connected to the contact pattern via the opening, and a portion of the branches at least partially overlap the contact pattern.
  6. The pixel structure of claim 1, further comprising a second pixel unit and a second data line, the second pixel unit comprising: a second active element electrically connected to the scan line And a second pixel electrode electrically connected to the second active component, the second pixel The electrode has a plurality of branches, and the branches extend above the first data line and the second data line and span the data lines.
  7. The pixel structure of claim 6, wherein the first pixel unit and the second pixel unit are located between the first data line and the second data line.
  8. The pixel structure of claim 6, wherein the second pixel electrode further has a strip pattern substantially parallel to the scan line, and one side of the strip pattern of the second pixel electrode extends from The branches of the second pixel electrode of the scan line are connected, and the other side of the strip pattern of the second pixel electrode partially overlaps the scan line.
  9. The pixel structure of claim 8, wherein a width of the stripe pattern of the second pixel electrode and the scan line is 40% of a width of the stripe pattern of the second pixel electrode. 90%.
  10. The pixel structure of claim 6, wherein the branches of the first pixel electrode and the projections of adjacent data lines on the substrate are separated from each other, the first pixel electrode and the adjacent data line. There is a gap between them.
  11. The pixel structure of claim 10, wherein the pitch ranges from 3 micrometers to 9 micrometers.
TW102113496A 2009-12-11 2009-12-11 Pixel structure TWI493266B (en)

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TWI566020B (en) * 2014-07-08 2017-01-11 群創光電股份有限公司 Display panel and display device
US10048528B2 (en) 2014-11-19 2018-08-14 Samsung Sdi Co., Ltd. Liquid crystal display
TWI548923B (en) * 2015-06-16 2016-09-11 友達光電股份有限公司 Display panel and pixel array thereof
TWI564642B (en) 2015-08-21 2017-01-01 友達光電股份有限公司 Liquid crystal display panel and liquid crystal aligning method thereof

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US20090046233A1 (en) * 2007-08-14 2009-02-19 Samsung Electronics Co., Ltd Thin film transistor array substrate and liquid crystal display panel having the same
US20090102994A1 (en) * 2007-10-17 2009-04-23 Oh Jae-Young In-plane switching mode liquid crystal display and method for fabricating the same
US20090135321A1 (en) * 2007-11-28 2009-05-28 Au Optronics Corp. Liquid crystal display element and pixel structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090046233A1 (en) * 2007-08-14 2009-02-19 Samsung Electronics Co., Ltd Thin film transistor array substrate and liquid crystal display panel having the same
US20090102994A1 (en) * 2007-10-17 2009-04-23 Oh Jae-Young In-plane switching mode liquid crystal display and method for fabricating the same
US20090135321A1 (en) * 2007-11-28 2009-05-28 Au Optronics Corp. Liquid crystal display element and pixel structure

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