CN104238201A - A touch LCD panel based on COA technology - Google Patents

Abstract

The invention provides a touch liquid crystal panel based on COA technology, which is provided with a display area and a non-display area. The touch liquid crystal panel includes: the first glass substrate comprises a black matrix layer and a first alignment layer covering the black matrix layer, and the black matrix layer is positioned in the non-display area; and a second glass substrate including a second alignment layer and a color filter layer under the second alignment layer. One side of the first glass substrate and one side of the second glass substrate both comprise photoresist spacers, and a displacement retaining wall is formed by the photoresist spacers on one side of the two substrates, so that the photoresist spacers on the other side of the two substrates are prevented from entering a display area of the touch liquid crystal panel. Compared with the prior art, the liquid crystal panel is provided with the photoresistive spacers on the two substrates respectively, and the photoresistive spacer on one side is used as the retaining wall, so that the photoresistive spacer on the other side cannot slide into the display area of the panel, and the display quality of the product is improved.

Description

A touch LCD panel based on COA technology

technical field

The invention relates to a touch liquid crystal panel, in particular to a touch liquid crystal panel based on COA technology.

Background technique

Thin Film Transistor Liquid Crystal Display (TFT-LCD) not only has the characteristics of light, thin and small, but also has the advantages of low power consumption, no radiation, and relatively low manufacturing cost. Dominant. The liquid crystal panel is the main component of TFT-LCD. The existing liquid crystal panel can be divided into two types according to the structure, that is, the traditional liquid crystal composed of the thin film transistor array substrate (Array Substrate) and the color filter substrate (Color Filter Substrate). panel, and a liquid crystal panel that uses color filters integrated in a thin-film transistor array substrate (Color Filter On Array, COA) technology.

Compared with the traditional liquid crystal panel, the liquid crystal panel using COA technology is integrated on the array substrate because of the color filter, so there is no problem that the color filter unit and the pixel electrode are not strictly aligned, and the aperture ratio of the liquid crystal panel can be improved , to increase the brightness of the LCD panel. However, in the prior art, the COA liquid crystal panel is provided with a plurality of photoresist spacers (PhotoSpacers, PS) between the array substrate and the opposite substrate, and these photoresist spacers are designed in the non-display area of the panel. If there is slipping or vibration during the manufacturing process, or if the position is moved after the manufacturing is completed, the photoresist spacer will run to the display area of the panel due to the displacement of the substrate. In the COA panel, due to the small topographical difference of the structure, these photoresist spacers entering the display area will cause scratches to the display area, causing the topography of the display area to be destroyed, the electric field to be distorted, and so on. Because the main photoresist spacers are often placed in the blue sub-pixels, usually there will be many small blue colors on the panel, which will affect the display quality of the product.

In view of this, how to design a touch liquid crystal panel based on COA technology, or improve the existing panel structure, so as to eliminate the above-mentioned defects in the prior art, is a problem to be solved urgently by relevant technical personnel in the industry.

Contents of the invention

Aiming at the above-mentioned defects of the touch liquid crystal panel based on COA technology in the prior art, the present invention provides a novel touch liquid crystal panel that can prevent photoresist spacers from entering the display area due to displacement.

According to one aspect of the present invention, a touch liquid crystal panel based on COA technology is provided, which has a display area and a non-display area, and the touch liquid crystal panel includes:

A first glass substrate, including a black matrix layer and a first alignment layer covering the black matrix layer, wherein the black matrix layer is located in the non-display area; and

A second glass substrate, including a second alignment layer and a color filter layer located below the second alignment layer,

Wherein, one side of the first glass substrate and one side of the second glass substrate both include photoresist spacers, formed by the photoresist spacers on one side of the first glass substrate and the second glass substrate A displacement blocking wall prevents the photoresist spacer on the other side of the first glass substrate and the second glass substrate from entering the display area of the touch liquid crystal panel.

In one of the embodiments, the first glass substrate includes a first photoresist spacer, which is arranged on the black matrix layer and faces the second glass substrate, and the second glass substrate includes two second photoresist spacers. a blocking spacer, located in the non-display area and disposed on the second alignment layer, wherein the second photoresist spacer is respectively located on both sides of the first photoresist spacer to form the displacement blocking wall .

In one embodiment, the thickness of the first photoresist spacer is greater than the thickness of the second photoresist spacer, and the first photoresist spacer is a main photoresist spacer.

In one of the embodiments, the first glass substrate includes two first photoresist spacers, which are arranged on the black matrix layer and face the second glass substrate, and the second glass substrate includes a second photoresist spacer. a blocking spacer located in the non-display area and disposed on the second alignment layer, wherein the first photoresist spacer is respectively located on both sides of the second photoresist spacer to form the displacement blocking wall .

In one embodiment, the thickness of the first photoresist spacer is smaller than the thickness of the second photoresist spacer, and the second photoresist spacer is the main photoresist spacer.

According to another aspect of the present invention, a touch liquid crystal panel based on COA technology is provided, which has a display area and a non-display area, wherein the touch liquid crystal panel includes:

A first glass substrate, including a black matrix layer and a first alignment layer covering the black matrix layer, wherein the black matrix layer is located in the non-display area;

A second glass substrate, including a second alignment layer and a color filter layer located under the second alignment layer; and

a first photoresist spacer, disposed on the black matrix layer and protruding toward the second glass substrate,

Wherein, the second alignment layer includes a concave portion, which is located in the non-display area of the touch liquid crystal panel and corresponds to the position of the black matrix layer, and the first photoresist spacer and the concave portion The bottoms are in contact, and the two sidewalls of the recessed portion are used as displacement barriers when the first photoresist spacer moves.

According to one aspect of the present invention, a touch liquid crystal panel based on COA technology is provided, which has a display area and a non-display area, and the touch liquid crystal panel includes:

A first glass substrate, including a black matrix layer and a first alignment layer covering the black matrix layer, wherein the black matrix layer is located in the non-display area;

A second glass substrate, including a second alignment layer and a color filter layer located under the second alignment layer; and

a first photoresist spacer, disposed on the second alignment layer and protruding toward the first glass substrate, and the first photoresist spacer is located in the non-display area of the touch liquid crystal panel,

Wherein, the first glass substrate further includes a recessed portion located in the non-display area of the touch liquid crystal panel, the first photoresist spacer is in contact with the bottom of the recessed portion, and the recessed portion The two sidewalls serve as displacement barriers when the first photoresist spacer moves.

In one of the embodiments, the black matrix layer includes a first black matrix unit and a second black matrix unit arranged at intervals, and the concave portion corresponds to the first black matrix unit and the second black matrix unit. The recessed area between cells.

In one of the embodiments, the recessed portion is disposed inside the black matrix layer.

In one of the embodiments, the depression is made by interference method, half tone mask method or gray tone mask method.

Using the touch liquid crystal panel based on COA technology of the present invention, the first glass substrate includes a black matrix layer and a first alignment layer covering the black matrix layer, and the second glass substrate includes a second alignment layer and a second alignment layer located on the second alignment layer. For the color filter layer below, photoresist spacers are provided on one side of the first glass substrate and one side of the second glass substrate, and a displacement barrier is formed by the photoresist spacers on one side of the two substrates, thereby preventing the two substrates from The photoresist spacer on the other side enters the display area of the touch liquid crystal panel. Compared with the prior art, in the liquid crystal panel of the present invention, photoresist spacers are respectively placed on the two substrates, and the photoresist spacers on one side are used as barriers so that the photoresist spacers on the other side will not slide into the panel. display area, thereby improving the display quality of the product.

Description of drawings

Readers will have a clearer understanding of various aspects of the present invention after reading the detailed description of the present invention with reference to the accompanying drawings. in,

FIG. 1 shows a schematic structural view of a touch liquid crystal panel based on COA technology in the prior art;

FIG. 2 shows a schematic structural view of a touch liquid crystal panel based on COA technology according to a first embodiment of the present invention;

3A and FIG. 3B are respectively schematic diagrams showing the states of the photoresist spacers in the touch liquid crystal panel of FIG. 2 when the substrate is displaced;

4 shows a schematic structural diagram of a touch liquid crystal panel based on COA technology according to a second embodiment of the present invention;

5 shows a schematic structural diagram of a touch liquid crystal panel based on COA technology according to a third embodiment of the present invention;

FIG. 6 shows a schematic structural diagram of a touch liquid crystal panel based on COA technology according to a fourth embodiment of the present invention; and

FIG. 7 shows a schematic structural diagram of a touch liquid crystal panel based on COA technology according to a fifth embodiment of the present invention.

Detailed ways

In order to make the technical content disclosed in this application more detailed and complete, reference may be made to the drawings and the following various specific embodiments of the present invention, and the same symbols in the drawings represent the same or similar components. However, those skilled in the art should understand that the examples provided below are not intended to limit the scope of the present invention. In addition, the drawings are only for schematic illustration and are not drawn according to their original scale.

The specific implementation manners of various aspects of the present invention will be further described in detail below with reference to the accompanying drawings.

FIG. 1 shows a schematic structural diagram of a touch liquid crystal panel based on COA technology in the prior art. Referring to FIG. 1 , the conventional touch liquid crystal panel includes a first glass substrate (such as a color filter substrate) 10 and a second glass substrate (such as a TFT array substrate) 20 . The touch liquid crystal panel receives the light from the backlight module 30, and controls the direction of the liquid crystal molecules by controlling the voltage between the two substrates, so as to realize the brightness control of the pixels.

The first glass substrate 10 includes a substrate 102, a first alignment layer 104, a black matrix layer (Black Matrix, BM) 106 and an upper polarizer (Upper Polarizer) 108. Wherein, the first alignment layer 104 is located under the substrate 102 and covers the display area (Active Area, AA) and the non-display area (also called "element area") of the panel. Here, the display area and the non-display area are separated by a straight line L, and the display area of the panel is located on the left side of the line L for displaying images or screens; the non-display area is located on the right side of the line L for placing control components or circuit board. The black matrix layer 106 is located below the substrate 102 , and a photo spacer (Photo Spacer) PS is disposed on its surface and protrudes toward the second glass substrate 20 . The upper polarizer 108 is located above the substrate 102 .

The second glass substrate 20 includes a substrate 202 , a second alignment layer 204 , a color filter layer 206 and a lower polarizer (Lower Polarizer) 208 . Wherein, the second alignment layer 204 is located on a side of the second glass substrate 20 close to the liquid crystal layer. A conductive layer (such as indium tin oxide material) is further disposed between the second alignment layer 204 and the color filter layer 206 . Thin film transistors are placed under the color filter layer 206 . The lower polarizer 208 is located below the substrate 202 .

As mentioned above, in the touch liquid crystal panel of FIG. 1, although the photoresist spacer PS is designed in the non-display area, if the panel slides or vibrates during the manufacturing process, the first glass substrate 10 and the second glass substrate 20 will have a relative displacement, and the photoresist spacer PS will easily run to the display area of the panel due to the displacement of the substrate. Due to the small difference in topography of the substrate structure, these photoresist spacers PS entering the display area will scratch the display area, causing the topography of the display area to be destroyed, the electric field to be distorted, and other undesirable situations.

In order to solve the above defects or deficiencies in the prior art, the present invention provides a novel touch liquid crystal panel structure. FIG. 2 shows a schematic structural diagram of a touch liquid crystal panel based on COA technology according to a first embodiment of the present invention. FIGS. 3A and 3B respectively illustrate the states of the photoresist spacers in the touch liquid crystal panel of FIG. 2 when the substrate is displaced.

Referring to FIG. 2 , in this embodiment, the touch liquid crystal panel of the present invention includes a first glass substrate 10 and a second glass substrate 20 . Similarly, the first glass substrate 10 includes a black matrix layer 106 and a first alignment layer 104 covering the black matrix layer 106 . The black matrix layer 106 is located in the non-display area of the panel (ie, on the right side of the line L). The second glass substrate 20 includes a second alignment layer 204 and a color filter layer 206 under the second alignment layer 204 .

It should be noted that the first glass substrate 10 further includes a first photoresist spacer PS1 disposed on the black matrix layer 106 and protruding toward the second glass substrate 20 . The second glass substrate 20 includes two second photoresist spacers PS21 and PS22. Wherein, the second photoresist spacer PS21 is arranged on the second alignment layer 204 and is located on the left side of the first photoresist spacer PS1, and the second photoresist spacer PS22 is arranged on the second alignment layer 204 and is located on the first photoresist spacer. Right side of barrier spacer PS1.

In this way, the second photoresist spacers PS21 and PS22 can serve as left walls and right walls respectively, even if there is a relative displacement between the first glass substrate 10 and the second glass substrate 20 , the photoresist spacer PS1 will not enter the display area of the panel due to the displacement of the substrate. For example, when the photoresist spacer PS1 moves to the right, the photoresist spacer PS22 will form a stopper, as shown in FIG. 3A . When the photoresist spacer PS1 moves to the left, the photoresist spacer PS21 will form a stopper, as shown in FIG. 3B .

In a specific embodiment, the thickness of the first photoresist spacer PS1 is greater than the thickness of the second photoresist spacer PS21 or PS22 . The first photoresist spacer PS1 is used as a main photoresist spacer (main PS) to realize signal sensing function.

In a specific embodiment, the color filter layer 206 includes a red filter, a green filter and a blue filter, and the first photoresist spacer PS1, the second photoresist spacer PS21 and PS22 are set In the blue filter area corresponding to the blue subpixel.

FIG. 4 shows a schematic structural diagram of a touch liquid crystal panel based on COA technology according to a second embodiment of the present invention.

Comparing FIG. 4 with FIG. 3 , the main difference between the two is that the arrangement of the photoresist spacers of the first glass substrate 10 and the second glass substrate 20 in FIG. 4 is different. Specifically, the first glass substrate 10 includes two first photoresist spacers PS11 and PS12 disposed on the black matrix layer 106 and facing the second glass substrate 20 . The second glass substrate 20 includes a second photoresist spacer PS2 located in the non-display area of the panel and disposed on the second alignment layer 204 . The first photoresist spacers PS11 and PS12 are respectively located on two sides of the second photoresist spacer PS2 to form a displacement barrier. Even if there is a relative displacement between the first glass substrate 10 and the second glass substrate 20 , the photoresist spacer PS2 will not enter the display area of the panel due to the substrate displacement.

In a specific embodiment, the thickness of the first photoresist spacer PS11 and PS12 is smaller than the thickness of the second photoresist spacer PS2, and the second photoresist spacer PS2 is the main photoresist spacer (main PS) to realize signal sensing Function.

FIG. 5 shows a schematic structural diagram of a touch liquid crystal panel based on COA technology according to a third embodiment of the present invention.

Comparing FIG. 5 with FIG. 3 , the main difference between the two is that, in the touch liquid crystal panel of FIG. 5 , the second alignment layer 204 of the second glass substrate 20 includes a concave portion 210 . The concave portion 210 is located in the non-display area of the panel (the right side of the straight line L) and corresponds to the position of the black matrix layer 106 . The first photoresist spacer PS1 is in contact with the bottom of the recessed part 210 , and the two sidewalls of the recessed part 210 serve as displacement barriers when the first photoresist spacer PS1 moves. Therefore, due to the existence of the recessed portion 210 , even if there is a relative displacement between the first glass substrate 10 and the second glass substrate 20 , the photoresist spacer PS1 will not enter the display area of the panel due to the substrate displacement.

FIG. 6 shows a schematic structural diagram of a touch liquid crystal panel based on COA technology according to a fourth embodiment of the present invention.

Comparing Fig. 6 with Fig. 5, the main difference between the two is that the black matrix layer of the first glass substrate 10 in Fig. 6 includes a first black matrix unit 106 and a second black matrix unit 112 arranged at intervals, and the concave The portion 110 corresponds to a recessed area between the first black matrix unit 106 and the second black matrix unit 112 . The photoresist spacer PS2 is in contact with the bottom of the recessed portion 110 , and the two sidewalls of the recessed portion 110 serve as displacement barriers when the photoresist spacer PS2 moves. Therefore, due to the existence of the recessed portion 110 , even if there is a relative displacement between the first glass substrate 10 and the second glass substrate 20 , the photoresist spacer PS2 will not enter the display area of the panel due to the substrate displacement.

FIG. 7 shows a schematic structural diagram of a touch liquid crystal panel based on COA technology according to a fifth embodiment of the present invention.

Comparing FIG. 7 with FIG. 5, the main difference between the two is that the black matrix layer 106 of the first glass substrate 10 in FIG. 7 includes a concave portion 110'. Likewise, the recessed portion 110' can also prevent the photoresist spacer PS2 from entering the display area of the panel due to the displacement of the substrate. In a specific embodiment, the recessed portion 110' of the black matrix layer 106 can be fabricated by an interference method, a half tone mask method or a gray tone mask method.

Using the touch liquid crystal panel based on COA technology of the present invention, the first glass substrate includes a black matrix layer and a first alignment layer covering the black matrix layer, and the second glass substrate includes a second alignment layer and a second alignment layer located on the second alignment layer. For the color filter layer below, photoresist spacers are provided on one side of the first glass substrate and one side of the second glass substrate, and a displacement barrier is formed by the photoresist spacers on one side of the two substrates, thereby preventing the two substrates from The photoresist spacer on the other side enters the display area of the touch liquid crystal panel. Compared with the prior art, in the liquid crystal panel of the present invention, photoresist spacers are respectively placed on the two substrates, and the photoresist spacers on one side are used as barriers so that the photoresist spacers on the other side will not slide into the panel. display area, thereby improving the display quality of the product.

Hereinbefore, specific embodiments of the present invention have been described with reference to the accompanying drawings. However, those skilled in the art can understand that without departing from the spirit and scope of the present invention, various changes and substitutions can be made to the specific embodiments of the present invention. These changes and substitutions all fall within the scope defined by the claims of the present invention.

Claims (10)

1. A touch liquid crystal panel based On COA (Color Filter On Array, Color Filter integrated in Array substrate) technology, having a display area and a non-display area, the touch liquid crystal panel comprising:

the first glass substrate comprises a black matrix layer and a first alignment layer covering the black matrix layer, wherein the black matrix layer is positioned in the non-display area; and

a second glass substrate including a second alignment layer and a color filter layer disposed below the second alignment layer,

the touch control liquid crystal display panel comprises a first glass substrate, a second glass substrate, a first glass substrate and a second glass substrate, wherein one side of the first glass substrate and one side of the second glass substrate both comprise a photoresist spacer, and a displacement retaining wall is formed by the photoresist spacer on one side of the first glass substrate and the second glass substrate, so that the photoresist spacer on the other side of the first glass substrate and the second glass substrate is prevented from entering a display area of the touch control liquid crystal display panel.

2. The touch liquid crystal panel of claim 1, wherein the first glass substrate comprises a first photo-resist spacer disposed on the black matrix layer and facing the second glass substrate, the second glass substrate comprises two second photo-resist spacers disposed on the second alignment layer and located in the non-display region,

the second photoresist spacers are respectively positioned at two sides of the first photoresist spacers to form the displacement retaining wall.

3. The touch liquid crystal panel of claim 2, wherein the first photo-resist spacer is thicker than the second photo-resist spacer, and the first photo-resist spacer is a main photo-resist spacer.

4. The touch liquid crystal panel of claim 1, wherein the first glass substrate comprises two first photo spacers disposed on the black matrix layer and facing the second glass substrate, the second glass substrate comprises a second photo spacer disposed on the non-display region and disposed on the second alignment layer,

the first photoresist spacers are respectively positioned at two sides of the second photoresist spacers to form the displacement retaining wall.

5. The touch liquid crystal panel of claim 4, wherein the first photo-resist spacer has a thickness less than that of the second photo-resist spacer, and the second photo-resist spacer is a main photo-resist spacer.

6. A touch liquid crystal panel based On COA (Color Filter On Array, Color Filter integrated in Array substrate) technology, having a display area and a non-display area, the touch liquid crystal panel comprising:

the first glass substrate comprises a black matrix layer and a first alignment layer covering the black matrix layer, wherein the black matrix layer is positioned in the non-display area;

the second glass substrate comprises a second alignment layer and a color filter layer positioned below the second alignment layer; and

a first photoresist spacer disposed on the black matrix layer and protruding toward the second glass substrate,

the second alignment layer comprises a concave part which is positioned in a non-display area of the touch liquid crystal panel and corresponds to the position of the black matrix layer, the first photoresist spacer is contacted with the bottom of the concave part, and two side walls of the concave part are used as displacement retaining walls when the first photoresist spacer moves.

7. A touch liquid crystal panel based On COA (Color Filter On Array, Color Filter integrated in Array substrate) technology, having a display area and a non-display area, the touch liquid crystal panel comprising:

the first glass substrate comprises a black matrix layer and a first alignment layer covering the black matrix layer, wherein the black matrix layer is positioned in the non-display area;

the second glass substrate comprises a second alignment layer and a color filter layer positioned below the second alignment layer; and

a first photoresist spacer disposed on the second alignment layer and protruding toward the first glass substrate, the first photoresist spacer being located in a non-display region of the touch liquid crystal panel,

the first glass substrate further comprises a concave part which is positioned in a non-display area of the touch liquid crystal panel, the first photoresist spacer is in contact with the bottom of the concave part, and two side walls of the concave part are used as displacement retaining walls when the first photoresist spacer moves.

8. The touch liquid crystal panel according to claim 7, wherein the black matrix layer comprises a first black matrix unit and a second black matrix unit arranged at an interval, and the recessed portion corresponds to a recessed area between the first black matrix unit and the second black matrix unit.

9. The touch liquid crystal panel according to claim 7, wherein the recess is disposed inside the black matrix layer.

10. The touch liquid crystal panel of claim 7, wherein the concave portion is fabricated by an interference method, a half tone mask (half tone mask) method or a gray tone mask (gray tone mask) method.