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Manufacture method for light guide plate

A manufacturing method and technology for a light guide plate, which are applied in the field of manufacturing light guide plates through die extrusion, and can solve the problems of uneven light distribution and poor display effect of the light guide plate.

Active Publication Date: 2015-03-25
NANTONG XIANGYANG OPTICAL ELEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the side-lit backlight, the light emitted from the light source enters the light guide plate from one side of the light guide plate, and the light near the light source is stronger. As the distance from the light source increases, the light on the light guide plate will gradually weaken. The light distribution on the entire surface of the light guide plate is uneven, and the display effect is poor

Method used

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  • Manufacture method for light guide plate
  • Manufacture method for light guide plate
  • Manufacture method for light guide plate

Examples

Experimental program
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Embodiment Construction

[0015] Next, the manufacturing method of the light guide plate of the present invention will be described with reference to the accompanying drawings.

[0016] as attached figure 1 As shown in , the mold used for manufacturing the light guide plate includes an upper mold 1 , a lower mold 2 , an injection port 3 , a side mold 4 , and a diffusion point template 5 . Upper mold 1 and lower mold 2 in the mould are rectangular, and the upper end surface of lower mold 2 is provided with the groove that is used for side mold 4 positioning near each edge of rectangle, as figure 2 As shown, each groove has an opening extending to the edge of the upper end face of the lower mold 2, and the four side molds 4 form a closed rectangle, which is arranged in the groove of the lower mold 2, and each side mold can be opened by the above opening. in or out. The upper end of the side mold 4 has an inclined surface near the outside, which is used to guide the upper mold 1 and the lower mold ...

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Abstract

A manufacture method for a light guide plate comprises: fusing the material used for manufacturing the light guide plate, injecting the material into a die provided with a heating pipe and a cooling pipe. The method is characterized by: injecting a liquid coolant via the end far from the injection port to the cooling pipe, wherein the temperature of the liquid coolant is gradually reduced along with the reduction of the die temperature, closing the valve of the injection port when the temperature of the liquid coolant reaches a certain value; and stopping injection of the liquid coolant when the temperature of the upper die and the lower die is below a certain temperature, opening the die, demolding and taking out the light guide plate.

Description

technical field [0001] The invention relates to a method for manufacturing a light guide plate, in particular to a method for manufacturing a light guide plate through die extrusion. Background technique [0002] LCD screen The liquid crystal itself does not emit light, it is a passive luminous display screen, so the LCD screen needs a backlight source to provide a light source. According to the type of light source, it can be divided into CCFL backlight, LED backlight and so on. Compared with CCFL backlight, LED has the following advantages as a backlight: First, it has become the mainstream of liquid crystal displays due to reasons such as good brightness uniformity, good color rendering, long life, low-voltage drive, good stability, and environmental protection. Backlight. As the backlight, besides the direct type in which the light source is arranged directly below the liquid crystal display, there is also an edge-light type. The edge-light type backlight includes a l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C39/02B29C39/26B29C39/38
Inventor 刘小燕刘仁玉
Owner NANTONG XIANGYANG OPTICAL ELEMENT