TWI427385B - Liquid crystal display panel - Google Patents

Description

LCD panel

The present invention relates to a liquid crystal display panel, and more particularly to a liquid crystal display panel in which a groove is disposed on a flat layer and four pixel electrodes are disposed around the groove, wherein the pixel electrodes adjacent in the horizontal direction or the vertical direction are There are unequal spacings between them.

In recent years, with the maturity of the production technology of liquid crystal display panels, products using various types of liquid crystal display panels have also been increasing. Therefore, various characteristics of the liquid crystal display panel have also been widely discussed by the public. Among the characteristics of various types of liquid crystal display panels and various liquid crystal display panels, the withstand voltage of the transmissive liquid crystal display panel is often discussed. After many design changes, the pressure resistance of the transmissive liquid crystal display panel has been greatly improved. One of the designs is a hybrid PS design. The focus of this design is to make part of the color filter substrate. The spacer of the surface can be in contact with the thin film transistor substrate after assembly, so that the liquid crystal display panel can maintain a fixed liquid crystal gap at all times, the spacer of this part is called main spacer; and the spacer of another part It is not in contact with the thin film transistor substrate at all times, but is in contact with the thin film transistor substrate when the liquid crystal display panel is subjected to externally applied pressure, thereby increasing the withstand voltage effect of the liquid crystal display panel, and the spacer of this portion is called Sub spacer. Generally, the main spacer has the same height as the secondary spacer, and the surface of the flat layer on the thin film transistor substrate has a plurality of recesses corresponding to the secondary spacers, thereby making the secondary spacers not always compatible with the thin film. The transistor substrate is in contact. However, the pixel electrode pattern disposed on the flat layer is often easily undulated due to the height of the lower groove, so that the photoresist is exposed during the exposure process due to insufficient exposure, which leads to poor development, causing uneven etching of the pixel electrode. . In addition, in the design of high-resolution products, the spacing between the pixel electrodes should be minimized. Therefore, it is easier to find the residual of the transparent conductive material of the pixel electrode due to poor exposure and development in the groove, thereby making the liquid crystal display panel A condition such as a bright spot or an abnormal display occurs.

One of the objects of the present invention is to provide a liquid crystal display panel to solve the problem of residual transparent conductive material of a pixel electrode faced by the prior art.

A preferred embodiment of the present invention provides a liquid crystal display panel including a first substrate, a plurality of gate lines, a plurality of data lines, a flat layer, and a plurality of pixel electrodes. The gate line is disposed on the first substrate along a first direction, and the data line is disposed on the first substrate along a second direction. The flat layer is disposed on the first substrate and covers the gate line and the data line. Wherein, the flat layer has at least one groove, and the groove corresponds to an intersection of a gate line and a data line. The pixel electrode is disposed on the flat layer. The two pixel electrodes adjacent to the grooves on the flat layer and aligned in the first direction each include a first portion adjacent the groove on the flat layer and a second portion away from the groove on the flat layer. A first pitch is formed between the two first portions of the two pixel electrodes, and a second pitch is formed between the two second portions of the two pixel electrodes, and the first pitch is greater than the second pitch. The two pixel electrodes adjacent to the grooves on the flat layer and arranged in the second direction respectively include a first portion adjacent the groove on the flat layer and a second portion away from the groove on the flat layer. The first portion of the two pixel electrodes has a third pitch therebetween, and the second portions of the two pixel electrodes have a fourth pitch, and the third pitch is greater than the fourth pitch.

Another preferred embodiment of the present invention provides a liquid crystal display panel including a first substrate, a plurality of gate lines, a plurality of data lines, a flat layer, and at least four pixel electrodes. The gate line is disposed on the first substrate along a first direction, the data line is disposed on the first substrate along a second direction, and the flat layer is disposed on the first substrate and covers the gate line and the data line. The flat layer has at least one groove, and the groove corresponds to an intersection of a gate line and a data line. The pixel electrodes are disposed on the flat layer and respectively correspond to the circumference of the groove, and each of the pixel electrodes has a notch facing groove.

The liquid crystal display panel of the present invention utilizes a liquid crystal display panel having unequal pitch designs between two pixel electrodes disposed on the flat layer and around the groove, thereby maintaining the pixels between the pixels. The minimum spacing while avoiding the problem that the transparent conductive material constituting the pixel electrode in the groove remains incomplete due to incomplete etching, thereby causing a bright spot or abnormal display of the liquid crystal display panel.

In order to provide a more detailed understanding of the features and technical aspects of the present invention, the following detailed description of the invention and the accompanying drawings. However, the attached drawings are for illustrative purposes only and are not intended to limit the invention.

The present invention will be described in detail with reference to the preferred embodiments of the present invention, efficacy.

Please refer to FIG. 1A, FIG. 1B and FIG. 1C. 1A and 1B are schematic top views of a liquid crystal display panel according to a first preferred embodiment of the present invention, and FIG. 1C is a cross-sectional view of the liquid crystal display panel of the preferred embodiment, wherein the liquid crystal display panel is highlighted. The features of the present invention are shown in Figs. 1A and 1B, and elements such as a second substrate, a flat layer, a gate line, and a data line are omitted, and the main spacer and the secondary spacer are further omitted in Fig. 1B. As shown in FIGS. 1A to 1C, the liquid crystal display panel 10 of the preferred embodiment of the present invention includes a first substrate 11, a plurality of gate lines GL, a plurality of data lines DL, a flat layer 12, and a plurality of pixels. Electrode 13. The gate lines GL are disposed on the first substrate 11 in parallel with each other in the first direction S1, for example, the horizontal direction in FIG. 1A, and the data lines DL are in the second direction S2, for example, the vertical direction in FIG. The first substrate 11 is disposed in parallel. Further, the flat layer 12 is disposed on the first substrate 11 and covers the gate line GL and the data line DL. In the present embodiment, the flat layer 12 has at least one groove C thereon, and the groove C substantially corresponds to the intersection of the gate line GL and the data line DL, and the groove C does not penetrate the flat layer 12. Further, the pixel electrode 13 is disposed on the flat layer 12, and four pixel electrodes 13 are disposed around the groove C. It should be noted that, in this embodiment, the arrangement density of the groove C on the flat layer 12 is substantially 1.5% to 2.2%, but is not limited thereto. Further, in the present embodiment, the groove C is substantially a circular groove having a height of substantially 0.44 angstroms ( , angstrom) to a depth of 0.84 angstroms, but not limited to this, the groove can also be other shapes according to the design, such as a square groove, a polygonal groove or an irregular shape groove.

In the present embodiment, the two pixel electrodes 13 adjacent to the groove C on the flat layer 12 and arranged in the first direction S1 respectively include the first portion 131 of the groove C near the flat layer 12 and away from the flat layer 12 The second portion 132 of the groove C is formed. The first portion 131 of the two pixel electrodes 13 has a first pitch D1, and the second portions 132 of the two pixel electrodes 13 have a second pitch D2, and the first pitch D1 is greater than the second pitch D2. On the other hand, the two pixel electrodes 13 adjacent to the groove C on the flat layer 12 and arranged in the second direction S2 respectively include a first portion 131 adjacent to the groove C on the flat layer 12 and a distance from the flat layer. The second portion 132 of the recess. The first portion 131 of the two pixel electrodes 13 has a third pitch D3, and the second portions 132 of the two pixel electrodes 13 have a fourth pitch D4, and the third pitch D3 is greater than the fourth pitch D4. In this embodiment, the first pitch D1 is substantially between 6 micrometers and 7.5 micrometers, the second pitch D2 is substantially between 4 micrometers and 5.5 micrometers, and the third pitch D3 is substantially between 6 micrometers and 5.5 micrometers. The micrometer is between 7.5 micrometers and the fourth pitch D4 is substantially between 4 micrometers and 5.5 micrometers, but is not limited thereto.

As apparent from the above, in the present embodiment, the overlapping area between the groove C and the pixel electrodes 13 around it is reduced, so that the problem of poor etching due to the difference in height of the flat layer 12 can be reduced. In addition, a small distance between the respective pixel electrodes 13 away from the second portion 132 of the groove C can be obtained, and a high resolution performance can be obtained. In other words, in the present embodiment, compared to the rectangular shape of the general pixel electrode 13 (as indicated by the broken line in FIG. 1B), the four pixel electrodes 13 disposed around the groove C are close to the groove. A portion 131 has a notch G which is internally contracted inside the respective pixel electrodes 13 to reduce the overlapping area of the pixel electrode 13 and the groove C, thereby reducing the height difference between the groove C and the surrounding flat layer 12. This causes a problem that uneven etching occurs when the pattern of the pixel electrode 13 is subsequently defined, resulting in a residual transparent conductive material such as indium tin oxide.

Further, in the present embodiment, for example, in FIG. 1C, the two first portions 131 of the two pixel electrodes 13 adjacent to the groove C and arranged in the first direction S1 partially overlap the groove C, and the groove C The two first portions 131 of the two pixel electrodes 13 adjacent to each other and arranged in the second direction S2 also overlap with the groove portion, but are not limited thereto.

In addition, as shown in FIG. 1C, the liquid crystal display panel 10 of the present invention further includes a second substrate 14, at least one main spacer PS1, and at least one spacer PS2. The second substrate 14 is disposed opposite to the first substrate 11. In addition, the main spacer PS1 and the secondary spacer PS2 are respectively disposed on the surface 141 of the second substrate 14 facing the first substrate 11, and the main spacer PS1 and the secondary spacer PS2 have the same height H2. The main spacer PS1 substantially corresponds to one of the intersections of the gate line GL and the data line DL, and the flat layer 12 at this position has no groove design, so the main spacer PS1 is flat with one of the flat layers 12. contact. In addition, the secondary spacer PS2 substantially corresponds to the recess C on the flat layer 12, and the depth of the recess C separates the secondary spacer PS2 from the flat layer 12 to form a gap between the secondary spacer PS2 and the flat layer 12. The distance H1 is not in contact with each other, wherein the distance H1 is approximately equal to the depth of the groove C. It should be noted that, in this embodiment, a composite spacer type (Hybrid PS) liquid crystal display panel is taken as an example, that is, a groove is arranged on the flat layer to make the liquid crystal display panel After assembly, the main spacers in contact with the flat layer and the secondary spacers not in contact with the flat layer are used to improve the withstand voltage of the liquid crystal display panel.

The liquid crystal display panel of the present invention is not limited to the above embodiments, but may have other different implementation forms. In the following, in the other preferred embodiments of the present invention, the same elements are denoted by the same reference numerals, and only the differences between the two embodiments will be described in detail. Please refer to FIG. 2A to FIG. 2C. FIG. 2A and FIG. 2B are schematic top views of a liquid crystal display panel according to a second preferred embodiment of the present invention, and FIG. 2C is a view of the preferred embodiment. A schematic cross-sectional view of a liquid crystal display panel in which the main spacer and the secondary spacer are omitted in FIG. 2B. As shown in FIGS. 2A to 2C, in the liquid crystal display panel 30 of the preferred embodiment, the two first portions 131 of the two pixel electrodes 13 adjacent to the groove C and arranged in the first direction S1 can be The edges of the grooves C are substantially aligned, and the two first portions 131 of the two pixel electrodes 13 adjacent to the grooves C and arranged in the second direction S2 may also be substantially aligned with the edges of the grooves C. In other words, the notch G of each of the pixel electrodes 13 is substantially aligned with the edge of the groove C. Since the pixel electrode 13 does not overlap with the groove C, unevenness in etching of the pixel electrode 13 can be avoided.

Please refer to FIG. 3A to FIG. 3C. FIG. 3A and FIG. 3B are schematic top views of a liquid crystal display panel according to a third preferred embodiment of the present invention, and FIG. 3C illustrates the preferred embodiment. A schematic cross-sectional view of the liquid crystal display panel, wherein the main spacer and the secondary spacer are omitted in FIG. 3B. As shown in FIGS. 3A to 3C, in the liquid crystal display panel 40 of the preferred embodiment, the two first portions 131 of the two pixel electrodes 13 adjacent to the groove C and arranged in the first direction S1 are respectively The groove C has a gap F, and the two first portions 131 of the two pixel electrodes 13 adjacent to the groove C and arranged in the second direction S2 have a gap F with the groove C, respectively. Since the pixel electrode 13 does not overlap with the groove C, unevenness in etching of the pixel electrode 13 can be avoided.

In summary, the liquid crystal display panel of the present invention has a design in which a groove is provided on a flat layer and a two-part pixel electrode located around the groove has an unequal spacing to maintain the pixel electrodes. The minimum pitch is at the same time, and at the same time, the problem that the transparent conductive material constituting the pixel electrode in the groove remains due to incomplete etching, thereby causing a bright spot or abnormal display of the liquid crystal display panel.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

10,30,40. . . LCD panel

11, 14. . . Substrate

12. . . Flat layer

13. . . Pixel electrode

131. . . first part

132. . . Second part

141. . . surface

C. . . Groove

D1. . . First spacing

D2. . . Second spacing

D3. . . Third spacing

D4. . . Fourth pitch

DL. . . Data line

GL. . . Gate line

G. . . gap

F. . . gap

PS1. . . Main spacer

PS2. . . Secondary spacer

S1. . . First direction

S2. . . Second direction

H1. . . distance

H2. . . height

1A and 1B are top plan views of a liquid crystal display panel according to a first preferred embodiment of the present invention.

FIG. 1C is a cross-sectional view showing the liquid crystal display panel of the preferred embodiment.

2A and 2B are top views of a liquid crystal display panel according to a second preferred embodiment of the present invention.

2C is a cross-sectional view showing the liquid crystal display panel of the preferred embodiment.

3A and 3B are top views of a liquid crystal display panel according to a third preferred embodiment of the present invention.

FIG. 3C is a cross-sectional view showing the liquid crystal display panel of the preferred embodiment.

10. . . LCD panel

11. . . Substrate

13. . . Pixel electrode

131. . . first part

132. . . Second part

C. . . Groove

D1. . . First spacing

D2. . . Second spacing

D3. . . Third spacing

D4. . . Fourth pitch

G. . . gap

PS2. . . Secondary spacer

PS1. . . Main spacer

S1. . . First direction

S2. . . Second direction

Claims (19)

A liquid crystal display panel comprising: a first substrate; a plurality of gate lines disposed on the first substrate along a first direction; a plurality of data lines disposed on the first substrate along a second direction; a flat layer disposed on the first substrate and covering the gate lines and the data lines, wherein the flat layer has at least one groove, the groove does not penetrate the flat layer, and the groove corresponds to a And a plurality of pixel electrodes disposed on the flat layer, wherein the two pixel electrodes adjacent to the groove and arranged along the first direction respectively comprise a first portion and a second portion, wherein a distance between each of the first portions of the two pixel electrodes arranged in the first direction and the groove is smaller than each of the two pixel electrodes arranged along the first direction a distance between the second portion and the recess, a first pitch between the two first portions of the two pixel electrodes arranged along the first direction, and the two pixel electrodes arranged along the first direction There is a second spacing between the two second portions, The first pitch is greater than the second pitch, and the two pixel electrodes adjacent to the groove and arranged along the second direction respectively comprise a first portion and a second portion, the two arranged along the second direction The distance between each of the first portions of the pixel electrodes and the recess is smaller than the distance between the second portions of the two pixel electrodes arranged in the second direction and the recess, along the second direction Having a third room between the two first portions of the two pixel electrodes And a second spacing between the two second portions of the two pixel electrodes arranged along the second direction, and the third spacing is greater than the fourth spacing. The liquid crystal display panel of claim 1, wherein the two first portions of the two pixel electrodes adjacent to the groove and arranged along the first direction partially overlap the groove, and The two first portions of the two pixel electrodes adjacent to each other and arranged in the second direction partially overlap the groove. The liquid crystal display panel of claim 2, wherein the first pitch is between 6 micrometers and 7.5 micrometers, and the second pitch is between 4 micrometers and 5.5 micrometers. Between 6 microns and 7.5 microns, and the fourth pitch is between 4 microns and 5.5 microns. The liquid crystal display panel of claim 1, wherein the two first portions of the two pixel electrodes adjacent to the groove and arranged along the first direction are aligned with edges of the groove, and The two first portions of the two pixel electrodes adjacent to the groove and arranged in the second direction are aligned with an edge of the groove. The liquid crystal display panel of claim 1, wherein the two first portions of the two pixel electrodes adjacent to the groove and arranged along the first direction respectively have a gap with the groove, and The two first portions of the two pixel electrodes adjacent to the groove and arranged along the second direction respectively have a gap with the groove. The liquid crystal display panel of claim 1, further comprising: a second substrate disposed opposite to the first substrate; and at least one spacer disposed on the second substrate facing the first substrate a surface, and generally corresponding to the at least one groove of the planar layer, wherein the secondary spacer has a distance from the planar layer. The liquid crystal display panel of claim 6, further comprising at least one main spacer disposed on the surface of the second substrate facing the first substrate, the at least one main spacer corresponding to the gate The line intersects with one of the data lines, and the at least one main spacer is in contact with the flat layer. The liquid crystal display panel of claim 7, wherein the at least one spacer has the same height as the at least one main spacer. The liquid crystal display panel of claim 6, wherein the distance between the spacer and the flat layer is equal to the depth of the recess. The liquid crystal display panel of claim 1, wherein the groove has a depth ranging from 0.44 angstroms to 0.84 angstroms. A liquid crystal display panel comprising: a first substrate; a plurality of gate lines disposed on the first substrate along a first direction; a plurality of data lines disposed on the first substrate along a second direction; a flat layer disposed on the first substrate and covering the gate lines and the data lines, wherein the flat layer has at least one recess a groove, the groove does not penetrate the flat layer, and the groove corresponds to a intersection of the gate line and one of the data lines; and four pixel electrodes are disposed on the flat layer and respectively correspond to Around the groove, each of the pixel electrodes has a notch facing the groove. The liquid crystal display panel of claim 11, wherein each of the pixel electrodes disposed around the groove overlaps the groove portion. The liquid crystal display panel of claim 11, wherein the notch of each of the pixel electrodes disposed around the groove is aligned with an edge of the groove. The liquid crystal display panel of claim 11, wherein each of the pixel electrodes disposed around the groove does not overlap the groove, and each of the pixel electrodes has a gap with the groove. The liquid crystal display panel of claim 11, further comprising: a second substrate disposed opposite to the first substrate; and at least one spacer disposed on the second substrate facing the first substrate a surface, and generally corresponding to the at least one groove of the planar layer, wherein the secondary spacer has a distance from the planar layer. The liquid crystal display panel of claim 15, further comprising at least one main spacer disposed on the surface of the second substrate facing the first substrate, the at least one main spacer corresponding to the gate The line intersects with one of the data lines, and the at least one main spacer is in contact with the flat layer. The liquid crystal display panel of claim 16, wherein the at least one spacer has the same height as the at least one main spacer. The liquid crystal display panel of claim 15, wherein the distance between the spacer and the flat layer is equal to the depth of the recess. The liquid crystal display panel of claim 11, wherein the groove has a depth ranging from 0.44 angstroms to 0.84 angstroms.