CN103293740B - Liquid crystal display panel - Google Patents

Abstract

A liquid crystal display panel, the liquid crystal display panel includes an upper substrate and a lower substrate, the upper substrate includes an alignment superscript, and the alignment superscript includes an upper main label and several symmetrically arranged with a first distance centered on the upper main label The upper subscript, the lower substrate includes the alignment subscript, the alignment index includes the first alignment subscript, and the first alignment index includes a first lower main subscript and several centered on the first lower main subscript. The first subscript arranged symmetrically at the second spacing.

Description

LCD panel

technical field

The invention relates to a liquid crystal display panel, in particular to a liquid crystal display panel with alignment marks.

Background technique

Liquid crystal displays are widely used in modern information devices such as televisions, notebooks, computers, mobile phones, and personal digital assistants due to their advantages such as thinness and lightness.

Generally, a liquid crystal display panel includes an upper substrate, a lower substrate and a liquid crystal layer sandwiched between the two substrates. Each substrate includes a display area and a peripheral area. Each peripheral area includes at least one alignment mark. In the manufacturing process of the liquid crystal display, before the upper and lower substrates are bonded together, the upper and lower substrates must be aligned through the alignment marks on the upper and lower substrates. However, the existing alignment marks are relatively simple, and it is not conducive to obtaining alignment deviation information quickly when the alignment deviation occurs when the two substrates are bonded together.

Contents of the invention

In view of this, it is necessary to provide a liquid crystal display panel capable of monitoring the alignment of the upper and lower substrates of the display panel and obtaining information of alignment deviation at the same time.

A liquid crystal display panel. The liquid crystal display panel includes an upper substrate and a lower substrate. Several film layers are respectively deposited on the upper substrate and the lower substrate. A pair of alignment marks are arranged on the display panel. The alignment marks include alignment superscripts and alignment The position subscript and the alignment superscript are arranged on the upper substrate, and the alignment superscript includes a main mark and a plurality of auxiliary marks arranged symmetrically with the first interval as the center. The alignment index, the alignment index is set on the lower substrate, the alignment index includes the first alignment index and the second alignment index, and the first alignment index and the second alignment index are respectively It includes a main subscript and a number of subscripts, the subscripts are arranged symmetrically with the second pitch centered on the main subscript, and the first alignment subscript and the second alignment subscript are located on different film layers on the lower substrate.

The upper substrate includes a black matrix layer and a color filter layer, and the alignment superscript is located on the black matrix layer. The lower substrate includes a first metal layer, an insulating layer, a semiconductor layer, a second metal layer and a transparent conductive layer, the first alignment index is located on the first metal layer, and the second alignment index is located on the second metal layer.

The alignment superscripts and alignment subscripts are arranged along the parallel first direction, and the second spacing is smaller than the first spacing.

In the liquid crystal display panel provided by the present invention, alignment is performed by using the alignment superscript and the first alignment subscript to ensure the alignment assembly of the upper and lower substrates, and the deviation information of the display panel can be quickly obtained by observing the alignment marks.

The present invention will be further described below in conjunction with specific embodiments with reference to the accompanying drawings.

Description of drawings

FIG. 1 is a top view of a liquid crystal display panel according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of a liquid crystal display panel according to an embodiment of the present invention along the line V-V in FIG. 1 .

Fig. 3 is a partially enlarged schematic diagram of a pair of alignment marks in the embodiment.

FIG. 4 is a partially enlarged schematic diagram of the offset of the alignment mark in FIG. 1 in Embodiment 1. FIG.

FIG. 5 is a partially enlarged schematic diagram of the offset of the alignment mark in FIG. 1 in Embodiment 1. FIG.

FIG. 6 is a partially enlarged schematic diagram of the offset of the alignment mark in FIG. 1 in Embodiment 1. FIG.

Fig. 7 is a partially enlarged schematic diagram of the alignment mark in Embodiment 2.

Explanation of main component symbols

LCD panel 100

display area 101

Peripheral District 102

Registration Mark 30

Lower substrate 110

Second display area 111

The second peripheral area 112

Upper substrate 120

First display area 121

First peripheral area 122

Black Matrix 127

Frame glue 128

Counterpoint Superscript 130

Upper main mark 130a

Superscript 130b

TFT 150

Gate 151

insulating layer 152

Passage Area 153

source and drain 154

Passivation layer 155

pixel electrode 156

Counterpoint subscript 230

First pair subscript 231

Second paraposition subscript 232

The first main mark 231a

First subscript 231b

The second lower main mark 232a

The second subscript 232b

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

detailed description

Please refer to FIG. 1 and FIG. 2 . FIG. 1 is a top view of a liquid crystal display panel 100 according to an embodiment of the present invention, and FIG. 2 is a partial cross-sectional schematic diagram along the line V-V in FIG. 1 . The liquid crystal display panel 100 is formed by laminating a lower substrate 110 and an upper substrate 120 through a sealant 128 , the upper substrate 120 may be a color filter substrate, and the lower substrate 110 may be an array substrate.

In this embodiment, the upper substrate 120 includes a first display area 121 and a first peripheral area 122 surrounding the first display area 121 . The first display area 121 includes a plurality of color filter resists R, G, B arranged at intervals, and a black matrix 127 located between the color filter resists R, G, B. The first peripheral area 122 is provided with a plurality of alignment superscripts 130 . In one embodiment, the alignment superscript 130 and the black matrix 127 are formed on the same layer and made of the same material, so as to serve as an alignment reference of the upper substrate 120 during the bonding manufacturing process. The black matrix 127 defines a plurality of pixel areas on the upper substrate 120 . The color filter color resists R, G, B are sequentially formed in the pixel area defined by the black matrix 127 .

The lower substrate 110 includes a second display area 111 and a second peripheral area 112 surrounding the second display area 111 . The second display area 111 includes a plurality of thin film transistors 150 corresponding to the color resistances R, G, and B of each color filter layer of the upper substrate 120 . The second peripheral area 112 is provided with a plurality of alignment subscripts 230 corresponding to the alignment superscripts 130 . The alignment index 230 includes a first alignment index 231 and a second alignment index 232 arranged at intervals. In this embodiment, the alignment subscript 230 is formed at the same time as the thin film transistor 150 is manufactured. Specifically, firstly, a first metal layer is formed on the lower substrate 110 to define the gate 151 of the thin film transistor 150 and the first alignment subscript 231 of the alignment subscript 230, and then a metal layer covering the lower substrate 110, the gate 151 and the first alignment subscript 231 is formed. The insulating layer 152 of the first alignment subscript 231, and then the semiconductor layer is sequentially formed to define the channel region 153 of the thin film transistor 150, and the second metal layer is formed to define the source and drain electrodes 154 of the thin film transistor 150 and the alignment subscript 230's second parametric subscript 232. Finally, the deposition and patterning of the passivation layer 155 and the pixel electrode 156 are continued.

In this embodiment, the alignment superscript 130 and the alignment subscript 230 are jointly defined as an alignment mark 30 . When manufacturing the liquid crystal display panel 100 , the precise positioning of the relative position between the upper substrate 120 and the lower substrate 110 can be precisely controlled through the alignment detection of the alignment superscript 130 and the alignment subscript 230 during lamination.

The manufacturing of the alignment mark 30 of the present invention is completely completed in the manufacturing process of the upper substrate 120 and the lower substrate 110 without adding additional steps.

FIG. 3 is an enlarged partial top view of a pair of alignment marks 30 in the peripheral region 102 of the liquid crystal display panel 100 after bonding. The alignment superscript 130 further includes a superscript 130a and several subscripts 130b arranged symmetrically with the first distance W1 centered on the main 130a, and these subscripts 130b extend along the X direction in FIG. 3 cloth.

The first alignment subscript 231 includes a first subscript 231a and a plurality of first subscripts 231b symmetrically arranged at a second equal distance W2 around the first subscript 231a. The first subscript 231b is extended and arranged along the X direction.

The second alignment subscript 232 includes a second main subscript 232a and a plurality of second subscripts 232b symmetrically arranged at a second equal distance W2 around the second main subscript 232a. The second subscript 232b is extended and arranged along the X direction. In this embodiment, the first distance W1 is slightly larger than the second distance W2. In one embodiment, each superscript 130b in the alignment superscript 130 has the same width, and the first distance W1 may be 0.5um. The mark patterns in the alignment subscript 230 also have the same width, and the width is equal to the width of each alignment mark pattern in the alignment superscript 130 . The second distance W2 may be 0.4um.

In this embodiment, the upper main mark 130a, the first lower main mark 231a and the second lower main mark 232a may be a first rectangular pattern with the same size. Moreover, the widths of the upper main label 130a, the first lower main label 231a and the second lower main label 232a are equal, and when the upper main label 130a, the first lower main label 231a and the second lower main label 232a are aligned, they are aligned in the width direction. (X direction) to keep overlapping. The first subscript 231b and the second subscript 232b can also be a second rectangular pattern with the same size. In order to identify different marks more clearly during alignment detection, the area of the upper main mark 130a may be larger than the area of the upper auxiliary mark 130b. The area of the first subscript 231a may be larger than the area of the first subscript 231b. The area of the second subscript 232a may also be larger than the area of the second subscript 232b.

As shown in Figure 3, when the first subscript 231a, the second subscript 232a and the upper main subscript 130a are completely aligned in the X direction, the first subscript 231b and the second subscript 232b are also completely aligned in the X direction. align. At this time, the upper subscript 130b is shifted by 0.1um, 0.2um, 0.3um, . Specifically, the first subscript 130b and the corresponding first subscript 231b or the second subscript 232b next to the right/left side of the main subscript 130a are shifted to the right/left by 0.1um, The second upper auxiliary label 130b on the right/left side of the main label 130a on the upper substrate 120 and the corresponding first lower auxiliary label 231b or second lower auxiliary label 232b are shifted to the right/left by 0.2um, And so on.

As shown in Figure 4, when the first main subscript 231a, the second main subscript 232a and the upper main subscript 130a are shifted in the X direction, for example, the first subscript 231a and the second main subscript 231a of the alignment subscript 230 The lower main mark 232a is aligned in the X direction, but the upper main mark 130a of the alignment superscript 130 is offset in the X direction. It is found through observation that the first lower auxiliary mark 231b or the second lower auxiliary mark 232b is in the first lower If the second first subscript 231b or the second subscript 232b on the right side of the main label 231a is just aligned with the superscript 130b of the alignment superscript 130 in the X direction, it can be determined that the alignment lower substrate has shifted to the right 0.2um, and so on.

As shown in Fig. 5, usually when the panels are pasted together, the first subscript 231a of the first subscript 231 of the subscript 230 and the main subscript 130a of the subscript 130 of the subscript 130 are controlled to control Alignment of two substrates. When the above two marks are completely coincident and aligned with the upper main label 130a and the first lower main label 231a during lamination, it means that there is no invention deviation in the lamination manufacturing process. Then detect whether the second lower main mark 232a and the upper main mark 130a are aligned in the X direction. If they are aligned, it means that the lower substrate 110 has no mask shift or etching deviation between the first metal layer and the second metal during the manufacturing process. shift. On the contrary, the second lower main label 232a and the upper main label 130a are not aligned in the X direction, as shown in the elliptical frame line in Figure 5, but the second second lower auxiliary label 232b on the right side of the second lower main label 232a is aligned with the upper main label 130a. If the superscript 130b of the alignment superscript 130 is aligned in the X direction, it can be determined that the manufacturing process of the first metal layer and the second metal layer has an alignment offset, and the offset is 0.2um to the right, and so on.

As shown in FIG. 6 , even if there is an offset during panel lamination, the offset dimension of the manufacturing process of the first metal layer and the second metal layer can be determined and calculated while calculating the lamination offset size. As shown in the figure, the first lower main mark 231a and the upper main mark 130a are shifted in the X direction. Through observation, it is found that the first lower auxiliary mark on the right side of the first lower main mark 231a is shown by the left oval frame line. If the subscript 231b and the upper subscript 130b are just aligned, it can be determined that the first alignment subscript 231 is shifted to the right by 0.1um relative to the alignment superscript 130, that is to say, when the panels are attached, the lower substrate 110 is relatively The upper substrate 120 is shifted to the right by 0.1 um. As shown in Figure 6, if the first lower main mark 231a and the second lower main mark 232a are not aligned in the X direction, but at the place shown by the oval frame line on the right, the third lower main mark 232a on the right side of the second lower main mark 232a The second subscript 232b is just aligned with the superscript 130b in the X direction, and it can be obtained through calculation that the second subscript 232 is offset to the right by 0.3um relative to the superscript 130 . However, the first alignment subscript 231 is shifted to the right by 0.1um relative to the alignment superscript 130, and the subtraction of the two results in that the second alignment subscript 232 is offset to the right relative to the first alignment subscript 231. Moved 0.2um. Therefore, it can be calculated at the same time that the lower substrate 110 is shifted to the right by 0.1um relative to the upper substrate 120 when the panels are attached, and at the same time the second metal layer is shifted to the right by 0.2um relative to the first metal layer. Reticle offset or etch offset.

As shown in FIG. 7 , FIG. 7 is a partially enlarged schematic diagram of the alignment mark in the second embodiment. The difference from Embodiment 1 is that in this embodiment, the superscripts 130b of the superscripts 130 are arranged on both sides of the main superscript 130a, and the distance between the subscripts 130b is W1. The distances between the main mark 130a and the first upper auxiliary mark 130b on the left and right sides thereof are W4 and W3 respectively, wherein W3 and W4 are not equal. Similarly, the distance between the first subscripts 231b and the second subscripts 232b is W2, and the distance between the first subscript 231a and the first subscripts on both sides of it is W2. The distances are W6 and W5 respectively, and the distances between the second main subscript 232a and the first second subscripts on both sides thereof are W6 and W5 respectively, wherein W6 and W5 are not equal. That is to say, the upper auxiliary label 130b is arranged on both sides of the upper main label 130a in an asymmetric form, and the first lower auxiliary label 231b and the second lower auxiliary label 232b are also arranged asymmetrically on the first lower main label 231a and the second subscript 232 on both sides. It is worth noting that, in order to quickly calculate the specific distance of the offset, the difference between W3 and W5 is preferably equal to the difference between W4 and W6, and the difference is also equal to the difference between W1 and W2.

In an alternative embodiment of the present invention, the upper main label 130a and the upper auxiliary label 130b are rectangular patterns including the same size, and an X mark is made at the upper main label 130a. Similarly, the first subscript 231a, the second subscript 232a, the first subscript 231b and the second subscript 232b can also be rectangular patterns of the same size.

To sum up, the alignment mark 30 in the present invention can not only realize the alignment monitoring in substrate lamination, but also can detect and calculate the deviation and the specific value of the deviation in the manufacturing process of the lower substrate 110 in time.

It can be understood that those skilled in the art can make various other corresponding changes and modifications according to the technical concept of the present invention, and all these changes and modifications should belong to the protection scope of the claims of the present invention.

Claims (11)

1. a display panels, this display panels comprises upper substrate and infrabasal plate,

Upper substrate comprises the contraposition subscript along first direction arrangement, this contraposition subscript comprises principal mark and multiple upper auxiliary mark being positioned at principal mark both sides on this on one, described upper principal mark and adjacent one has the first spacing between auxiliary mark, and between adjacent two upper auxiliary marks, also there is this first spacing;

Infrabasal plate comprises contraposition subscript, this contraposition subscript comprises the first contraposition subscript of arranging along described first direction, this the first contraposition subscript comprises one first time principal mark and multiple first time auxiliary mark being positioned at these first time principal mark both sides, between described first time principal mark and adjacent one first time auxiliary mark, there is the second spacing, and between adjacent two first time auxiliary marks, also there is this second spacing, described first spacing and described second spacing unequal, described infrabasal plate also comprises the second contraposition subscript, this the second contraposition subscript comprise one second time principal mark and some be positioned at these second time principal mark both sides and with second spacing arrangement second time auxiliary mark.

2. display panels as claimed in claim 1, is characterized in that: described second time auxiliary is marked with symmetry arrangement centered by this second time principal mark.

3. display panels as claimed in claim 1, is characterized in that: the first described contraposition subscript and the second contraposition subscript are positioned at different rete.

4. display panels as claimed in claim 2, is characterized in that: described infrabasal plate comprises the first metal layer, insulation course and the second metal level further successively.

5. display panels as claimed in claim 4, is characterized in that: the first described contraposition subscript and the same layer of this first metal layer.

6. display panels as claimed in claim 4, is characterized in that: the second described contraposition subscript and the same layer of this second metal level.

7. display panels as claimed in claim 2, is characterized in that: described upper substrate comprises black-matrix layer and chromatic filter layer further.

8. display panels as claimed in claim 7, is characterized in that: described contraposition subscript and the same layer of this black matrix".

9. display panels as claimed in claim 1, is characterized in that: the second described spacing is less than this first spacing.

10. display panels as claimed in claim 1, is characterized in that: to be describedly auxiliaryly marked with on this symmetry arrangement centered by principal mark.

11. display panels as claimed in claim 1, is characterized in that: described first time auxiliary is marked with symmetry arrangement centered by this first time principal mark.