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Light guiding plate mould and its mould core

A light guide plate, mold core technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of unevenness, warpage around the light guide plate, affecting the optical performance of light source devices and liquid crystal displays, etc.

Inactive Publication Date: 2005-01-26
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, the mold core of the light guide plate is made of STAVAX stainless steel. When the molten plastic enters the mold and gradually cools down, the cooling rate is too fast, and the surface of the light guide plate is often uneven or even warped because the internal stress of the light guide plate is not fully released. Happening
like figure 1 As shown, the light guide plate 100 using the prior art light guide plate mold has an uneven shape around the light guide plate, which will cause great variation in the reflection and transmission of light, and then affect the optical performance of the light source device and the liquid crystal display.

Method used

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  • Light guiding plate mould and its mould core
  • Light guiding plate mould and its mould core
  • Light guiding plate mould and its mould core

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Embodiment Construction

[0020] see figure 2 , The light guide plate mold core 13 of the present invention is a module with a concave pattern 13a on the surface, and the concave pattern 13a can be cylindrical, zigzag, square, bowl, semi-cylindrical or elliptical cylindrical. Cylindrical, zigzag, square, bowl-shaped, semi-cylindrical or elliptical cylindrical dots can be formed corresponding to the bottom surface of the light guide plate to achieve the luminance and viewing angle distribution required by the specifications.

[0021] The mold core 13 of the light guide plate is made of a material with a thermal conductivity between 0.002 and 0.009 cal / cm.S.K. The material can be sillimanite or cordierite. In addition, the manufacturing method of the mold core 13 of the light guide plate is as follows: Figure 3 to Figure 8 shown.

[0022] Such as image 3 As shown, a planar substrate 10 is provided. First, a uniform photoresist layer 11 is coated on the planar substrate 10. The photoresist layer 11 ...

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Abstract

The invention is a light guiding board mold, which includes a guiding mold core, a father mold and a mother mold, the guiding mold core is between the father mold and the mother mold, the light guiding mold core is made from material with coefficient of thermal conductivity between 0.002 and 0.009cal / cm.S.K, and one surface has preplanned pattern.

Description

【Technical field】 [0001] The invention relates to a mold for a light guide plate and a mold core thereof, in particular to a mold for manufacturing a light guide plate of a flat-panel display and a mold core thereof. 【Background technique】 [0002] Since the liquid crystal itself in the liquid crystal display has no luminous properties, in order to achieve a good visual effect, it is necessary to have a light source device that can provide uniform planar light, such as a backlight module. The backlight module usually includes a light source (a linear light source such as a cold cathode tube, or a point light source such as a light-emitting diode), a light guide plate, and a reflector. Its working principle is as follows: the light emitted by the light source directly or indirectly enters the light guide plate The bottom surface with an optical structure design and the reflection plate reflect, diffuse and emit at a certain angle, and evenly distribute in the light-emitting a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/26G02F1/33
Inventor 吕昌岳余泰成陈杰良
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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