Negative thermal expansion microspheres, preparation method and liquid crystal display panel

Abstract

The embodiment of the invention provides negative thermal expansion microspheres, a preparation method and a liquid crystal display panel and relates to the technical field of display. A LC Margin range can be widened, low-temperature bubbles and uniform gravitational display are decreased, and the problem of liquid crystal clearing points for ensuring normal display can be avoided. The liquid crystal display panel comprises an adjusting layer arranged on the surface, in contact with a liquid crystal layer, of an array substrate and / or arranged on the surface, in contact with a liquid crystal layer, of a paired box substrate, wherein the adjusting layer includes the negative thermal expansion microspheres and is arranged in a no-light-transmitting portion of a display zone and a non-display zone within a frame adhesive, and the negative thermal expansion microspheres include sealed housings and inner cores coated by the sealed housings. The sealed housings are made from a negative thermal expansion material. The inner cores comprise heat storage bodies, and the heat storage bodies are made from a heat storage material. The volumes of the heat storage bodies in the heat absorbing process are smaller than or equal to the volumes of the sealed housings in thermal expansion.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a negative thermal expansion microsphere, a preparation method and a liquid crystal display panel. Background technique [0002] Such as figure 1 As shown, the liquid crystal display panel includes an array substrate 10 and a box-aligning substrate 20. A sealant 30 is arranged between the array substrate 10 and the box-aligning substrate 20 for sealing the liquid crystal display panel. It also includes an array substrate 10 located inside the sealant 30. The liquid crystal layer 40 and the spacer (Post Spacer, referred to as PS) 50 between the cell and the cell substrate 20 . The thickness of the liquid crystal display panel is supported by the frame glue 30 , the spacer 50 and the liquid crystal layer 40 . [0003] In the manufacturing process, LC Margin (Liquid Crystal Margin, liquid crystal filling amount) must be within a certain range, otherwise, because the density of li...

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Problems solved by technology

[0003] In the manufacturing process, LC Margin (Liquid Crystal Margin, liquid crystal filling amount) must be within a certain range, otherwise, because the density of liquid crystal changes greatly with temperature, on the one hand, in a high temperature environment, the liquid crystal layer 40 in the liquid crystal display panel The coefficient of thermal expansion of the spacer 50 is significantly greater than that of the spacer 50 and the sealant 30, so that the liquid crystal layer 40 plays a major supporting role, the support force borne by the spacer 50 decreases, and the fluidity of the liquid crystal layer 40 increases, and the liquid crystal layer 40 due to its own gravity and the flow of liquid crystals, so that some areas of the liquid crystal display panel have too much liquid crystals, resulting in uneven gravity display (Gravity Mura) at high temperatures; on the other hand, in low temperature environments, the volume shrinkage of the liquid crystal layer 40 is greater than that of the spacer 50 and sealant 30, which may easily cause low temperature bubbles (Low Temperature Bubble) to appear in the display area of ​​the LCD panel

[0004] On this basis, when the temperature inside the liquid crystal display panel is too high and exceeds the clearing point (TNi) of the liquid crystal, it will cause abnormal display of the liquid crystal display panel.

At present, the method of increasing the clearing point of the liquid crystal is usually adopted to ensure the normal display of the liquid crystal display panel. However, increasing the clearing point of the liquid crystal will sacrifice some characteristics of the liquid crystal, such as increasing the response time, etc., thereby limiting the variety of liquid crystal types. select

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