CN100373231C - LCD panel - Google Patents

Abstract

The invention provides a liquid crystal panel, at least comprising: a conductive substrate having a plurality of conductive lines; a color filter substrate arranged in parallel above the wire substrate; a liquid crystal layer arranged between the conducting wire substrate and the color filter substrate; it is characterized by also comprising: at least one opening is arranged on the color filter substrate, the position of the opening corresponds to the conducting wire, wherein the thickness of the liquid crystal layer corresponding to the opening is a first distance, the thickness of the liquid crystal layer outside the opening is a second distance, and the difference between the first distance and the second distance is small. The invention solves the problem that the gap of the liquid crystal cell is not uniform as the height of the convex structure formed by overlapping each filter layer and the corresponding lead on the lower substrate is higher, and improves the yield and the quality of the liquid crystal panel.

Description

LCD panel

technical field

The invention relates to a liquid crystal display panel, in particular to a color filter layer structure in the liquid crystal panel.

Background technique

With the increasing demand for liquid crystal displays such as notebook computers (notebooks), monitors and televisions, liquid crystal displays have developed vigorously in recent years, and various liquid crystal displays have been developed according to their light processing modes, such as transmissive liquid crystal displays, Reflective liquid crystal display, transflective liquid crystal display. Liquid crystal display is composed of color filter, glass substrate, polarizer, backlight module, liquid crystal, driving circuit and other components. In the production process of the liquid crystal panel, in order to increase the colors that the liquid crystal panel can display, it is necessary to set various color resistances (or filter layers) on the color filter substrate, such as red color resistance, green color resistance, etc. , blue color resistance, etc. Referring to FIG. 1, it is a schematic diagram of a known structure of a liquid crystal panel. In this structure, the color filter layers are formed on the upper substrate 100 by using a photomask and photolithography (photolithography). Because the interfaces of the filter layers 102a, 102b, and 102c overlap each other, a raised structure 104 will be formed. The raised structure 104 is located on the upper substrate 100 corresponding to the position of the data line 108 (or scanning line) in the reflection area on the lower substrate 110 , and this raised structure 104 can replace the role of a black matrix. On the lower substrate 110, several transistors (TFT) 112 are electrically connected to the data lines 108, and an insulating layer 107 covers the transistors 112 and the data lines 108 or scanning lines, and a reflective layer is formed on the insulating layer 107 in the reflective area. Layer 106.

The protruding structure 104 corresponds to the data line and the scanning line (gateline) of the lower substrate 110, generally, its height is about 0.3 to 0.7 microns (μm) higher than the surface of the reflective area. Therefore, refilling the liquid crystal 20 will result in a difference of 0.6 to 1.5 microns (μm) between the first distance 116 a and the second distance 114 a. In the current semi-reflective and semi-transmissive liquid crystal panel manufacturing process, the cell gap is controlled by ball spacers on the reflective area. Therefore, when the ball spacer is sprinkled, if the ball spacer is sprinkled on the data line (data line) and the scanning line (gate line), the cell gap ( The overall uniformity of cell gap) is not good.

Contents of the invention

In view of the above-mentioned background, the purpose of the present invention is to provide a liquid crystal panel to solve the problem that the raised structure formed by the overlap of each filter layer and the height of the corresponding wires on the lower substrate are relatively high, resulting in an overall gap between the unit cells. unevenness, and improve the yield and quality of LCD panels.

For reaching above-mentioned purpose, the technical characterictic that the present invention provides is as follows:

A liquid crystal display panel, at least comprising:

A wire substrate, at least having a plurality of wires, and an insulating layer covering the wires and the surface of the wire substrate, the insulating layer is higher than the insulating layer covering the wires due to the height difference between the wires and their surroundings. At least one protrusion is formed by an insulating layer covering the surface of the lead substrate;

A color filter substrate, arranged in parallel above the lead substrate; a liquid crystal layer arranged between the lead substrate and the color filter substrate; it is characterized in that it also includes:

At least one opening is arranged on the color filter substrate, the position of the opening corresponds to the position of the wire passing through the deflector, wherein the thickness of the liquid crystal layer corresponding to the opening is a first distance, corresponding to the outside of the opening The thickness of the opening is a second distance, wherein the opening is used to compensate the height difference between the wire and its periphery, that is, to compensate the height of the protrusion, thereby reducing the gap between the first distance and the second distance, and then uniformizing the The thickness of the liquid crystal layer.

The color filter substrate of the present invention partially corresponds to an opening provided at the position of the wire on the wire substrate, and the size of the opening can be greater than or equal to the width of the wire. Afterwards, a liquid crystal layer is filled between the wiring substrate and the color filter substrate. Because the opening on the color filter substrate compensates for the high wire height, the thickness of the liquid crystal at any position is roughly the same, and the difference is as small as 0 to 0.6 microns.

Description of drawings

FIG. 1 is a schematic cross-sectional view of a reflective region in a known liquid crystal panel.

2A and 2B are schematic cross-sectional views of the reflective area in the liquid crystal panel of the present invention.

3A and 3B are schematic cross-sectional views of the reflective area in the liquid crystal panel with the black matrix of the present invention.

4A to 4C are schematic top views of the present invention with different opening positions.

Explanation of symbols in the figure:

10 color filter substrate

20 liquid crystal layers

30 conductive substrate

100 upper substrate

102a, 102b, 102c filter layer

104 raised structures

106 reflective layer

107 insulating layer

108 wire

110 lower substrate

112 transistors

114a, 114b second distance

116a, 116b first distance

402 penetration zone

404 reflection area

406a, 406b data line

408a, 408b scan lines

Detailed ways

2A is a schematic cross-sectional view of an embodiment of the present invention, including a lead substrate 30 with several wires 108, a color filter substrate 10 arranged in parallel above the lead substrate 30, and the color filter substrate 10 has an opening 105a Corresponding to the wire 108 , and a liquid crystal layer 20 fills the gap between the wire substrate 30 and the color filter substrate 10 .

The lead substrate 30 is composed of a plurality of leads 108 on the lower substrate 110, including data lines and scan lines perpendicular thereto, and a plurality of transistors 112 electrically connected to the data lines and the scan lines. And an insulating layer 107 is formed on the lower substrate 110 to cover the transistor 112 , the wire 108 and the surface of the lower substrate 110 , and the material of the insulating layer 107 can be an organic material. And a reflective layer 106 is formed on the insulating layer 107 in the area defined as the reflective area.

The color filter substrate 10 includes an upper substrate 100, on the surface opposite to the lower substrate 110, several filter layers (or color resists) 102a, 102b, 102c are formed, such as a red filter layer and a green filter layer. with blue filter layer etc. Each filter layer does not overlap to form a bare area 103a, this area corresponds to the wire 108 on the lower substrate 110, and the size can be the same as the width of the wire 108, but as shown in Figure 2B, the exposed area 103b can be larger than The width of the wire 108 corresponds to the position of the wire 108 and its periphery. The exposed area 103b can be fabricated by enlarging the shielding portion of the mask to reduce the filter layers so that they do not overlap each other and form the exposed area 103b. Then, a transparent layer L05 is formed on each filter layer 102a, 102b, 102c on the surface of the upper substrate 100, and an opening 105a is formed in the exposed area. The size of the opening relative to the lower substrate can be that the size of the opening 105 a is equal to the width of the wire 108 as shown in FIG. 2A , or the size of the opening 105 b is larger than the width of the wire 108 as shown in FIG. 2B . And the transparent layer 105 can be an organic material.

The thickness of the liquid crystal layer 20 corresponding to the opening 105b is the first distance 116b, and the thickness outside the corresponding opening 105b is the second distance 114b. The first distance and the second distance are approximately in the range of 1 micron to 7 microns. Because the openings 105a, 105b compensate the height difference between the wire 108 and its periphery, the difference between the first distance 116b and the second distance 114b is between 0 micrometers and 0.6 micrometers. So that when the ball spacer is sprinkled, if the ball spacer is sprinkled on the data line (data line) and the scanning line (gate line), it will not cause the unit cell of the liquid crystal panel The overall uniformity of the cell gap is poor.

Referring to FIG. 3A , another embodiment of the present invention provides a liquid crystal panel, including a wiring substrate 30 composed of the lower substrate 110 , wiring 108 , insulating layer 107 and reflective layer 106 as described above. A color filter substrate 10. The color filter substrate 10 differs from the color filter substrate 10 in FIG. 2A and FIG. 2B in that it has a black matrix 109 in the exposed area 103a. The size of the exposed area 103 a and the opening 105 a of the color filter substrate 10 is about the same as the width of the wire 108 . However, as shown in FIG. 3B , the size of the exposed area 103 b and the opening 105 a is larger than the width of the wire 108 . In this embodiment, the height difference between the wire 108 and its periphery is also compensated through the opening 105a, so that the difference between the first distance 116b and the second distance 114b is approximately between 0 μm and 0.6 μm. Therefore, the overall uniformity of the cell gap of the liquid crystal panel is improved. The first distance and the second distance of the liquid crystal are also in the range of 1 micron to 7 microns.

There are many implementations of the openings on the color filter substrate, such as the following examples, but are not limited to these examples, and can be changed as required. 4A is a schematic plan view of a liquid crystal panel of the present invention, the liquid crystal panel includes several transmissive regions 402 and reflective regions 404, and several data lines 406a and scanning lines 408a perpendicular to the data lines 406a. On the data lines 406a and 408a, corresponding positions of the color filter substrates have openings, that is, there is no filter layer thereon.

As shown in FIG. 4B , the liquid crystal panel of the present invention has an opening at the position of the color filter substrate corresponding to the scanning line 408a, that is, there is no filter layer thereon, but there are filter layers at other positions on the substrate including the data line 406b. Alternatively, the liquid crystal panel shown in FIG. 4C has scanning lines 408 a and data lines 406 a with a filter layer on them, and scan lines 408 b and data lines 406 b without a filter layer on them. The opening can also be disposed at the intersection corresponding to the data line 406b and the scan line 408b.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Changes can still be made and implemented within the scope of not departing from the essence of the present invention, and these changes should still belong to the scope of the present invention. Accordingly, the scope of the invention is defined by the appended claims.

Claims (12)

1. A liquid crystal display panel, comprising at least: A wire substrate, at least having a plurality of wires, and an insulating layer covering the wires and the surface of the wire substrate, the insulating layer is higher than the insulating layer covering the wires due to the height difference between the wires and their surroundings. an insulating layer covering the surface of the lead substrate to cause at least one protrusion; A color filter substrate, arranged in parallel above the lead substrate; a liquid crystal layer arranged between the lead substrate and the color filter substrate; it is characterized in that it also includes: At least one opening is arranged on the color filter substrate, the position of the opening corresponds to the wire, wherein the thickness of the liquid crystal layer corresponding to the opening is a first distance, and the thickness other than the opening is a second distance, The opening is used to compensate the height difference between the wire and its surroundings, that is, to compensate the height of the protrusion, so as to reduce the gap between the first distance and the second distance, thereby uniformizing the thickness of the liquid crystal layer. 2 . The liquid crystal display panel as claimed in claim 1 , wherein the difference between the first distance and the second distance is 0 μm to 0.6 μm. 3. The liquid crystal display panel as claimed in claim 2, wherein the opening is further corresponding to a part of the peripheral position of the conductive line, that is, the width of the opening is larger than the width of the conductive line. 4. The liquid crystal display panel as claimed in claim 2, wherein the color filter substrate further has a black matrix disposed corresponding to the opening, and the width of the black matrix is less than or equal to the width of the opening. 5. The liquid crystal display panel as claimed in claim 2, wherein the color filter substrate further has a black matrix disposed corresponding to the opening. 6. The liquid crystal display panel as claimed in claim 2, wherein the width of the opening is greater than or equal to the width of the wire. 7 . The liquid crystal display panel as claimed in claim 1 , wherein the opening further corresponds to a part of the peripheral position of the conductive line, that is, the width of the opening is larger than the width of the conductive line. 7 . 8. The liquid crystal display panel as claimed in claim 1, wherein the color filter substrate further has a black matrix disposed corresponding to the opening. 9. The liquid crystal display panel as claimed in claim 8, wherein the width of the black matrix is smaller than or equal to the width of the opening. 10. The liquid crystal display panel as claimed in claim 1, wherein the first distance is 1 micron to 7 microns. 11. The liquid crystal display panel as claimed in claim 1, wherein the second distance is 1 micron to 7 microns. 12. The liquid crystal display panel according to claim 1, wherein the color filter substrate at least comprises: One upper substrate; a color filter layer disposed on the upper substrate, wherein the color filter layer includes a red filter layer, a green filter layer and a blue filter layer separated from each other; and A transparent layer covers the color filter layer and has at least one opening, and each opening corresponds to a wire.

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