Color film substrate, production method thereof and liquid crystal panel

Abstract

The invention provides a color film substrate, a production method thereof and a liquid crystal panel with the color film substrate. The production method of the color film substrate includes the following steps: 1) base pads are arranged at design positions of spacers on a first substrate; 2) the spacers are respectively arranged on the base pads and at other design positions of the spacers without the base pads on the first substrate to form spacers with different heights; or the base pads have two or multiple different heights, and the spacers are respectively arranged on the base pads with the different heights to form the spacers with the different heights. By the production method, various height differences of the spacers can be formed, and production cost is low.

Description

technical field [0001] The invention belongs to the technical field of display manufacturing, and in particular relates to a color filter substrate, a manufacturing method thereof, and a liquid crystal panel including the color filter substrate. Background technique [0002] In the existing liquid crystal panel, a plurality of spacers are usually arranged between the color filter substrate and the array substrate, and the heights of the plurality of spacers are generally the same. figure 1 It shows the position diagram of the spacer (column spacer) commonly used in the prior art on the color filter substrate and the cross-sectional view of the liquid crystal panel formed by the color filter substrate after the cell alignment is completed. From figure 1 It can be seen that the heights of spacers commonly used at present are equal. However, with the further popularization and application of liquid crystal displays, in order to obtain a certain amount of liquid crystal fillin...

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Problems solved by technology

However, since the thickness of each layer in the array substrate is relatively fixed, the height difference between spacers of different heights made in this way is also relatively fixed, so that the adjustment range of the corresponding liquid crystal filling amount becomes relatively limited.

In addition, since the spacers of different heights need to be made by using this method to utilize the own level difference of the array substrate, the spacers need to be set according to the position of the level difference, so that the places where the spacers are allowed to be placed in the design become very limited. Usually, there are certain requirements for the position of the spacer

like image 3 As shown, the relatively tall spacers (the spacers that are in contact with the steps on the array substrate) and the relatively short spacers (the spacers that are not in contact with the steps on the array substrate) should be set on the black Between two adjacent light-transmitting areas on the matrix, a certain distance should generally be reserved between the spacer and each light-transmitting area to avoid pixel light leakage caused by poor rubbing orientation, which makes the design of the black matrix The position of the spacer needs to be accommodated, so the aperture ratio of the pixel area cannot be further improved. A lower pixel aperture ratio will bring a lower transmittance, and a lower transmittance is not conducive to high PPI ( Pixel Per Inch, pixel density, the number of pixels per inch, used to characterize the display fineness of display devices)

On the other hand, the size (diameter) of spacers formed in this way is generally smaller than that of ordinary spacers (that is, their diameters are smaller than figure 1 and figure 2 The diameter of the spacer shown in ), the smaller size of the spacer will bring a lower proportion of the supporting area of ​​the spacer, which is not conducive to the performance of the pressing strength of the display panel, and is not conducive to the increasingly wide range of touch screen terminal applications

In addition, due to the pursuit of higher display quality, in the current high-end display panel products, the Overcoat (flat layer) material is also used to planarize the array substrate to form a flat layer. The result is , the surface of the array substrate is basically flat, so there is no image 3 The level difference layer 9 that can be used in , if the spacers with the same absolute height are still used, it is impossible to achieve multiple heights of spacers in high-end display panels

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