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Light guide plate warping correction method, and device thereof

A light guide plate and warping technology, which is applied in the field of light guide plates, can solve problems such as uneven light and shade, water absorption of light guide plate materials, residual stress release, etc., and achieve the effect of rapid correction of warpage

Inactive Publication Date: 2013-03-06
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The light guide plate using the injection molding method is prone to warpage after injection molding due to residual stress release after injection and water absorption of the light guide plate material, and the warped light guide plate is assembled into the backlight module and LCD panel. After assembly, it is easy to cause local uneven brightness and darkness due to the warped light guide plate pressing against the pixels in a specific area

Method used

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  • Light guide plate warping correction method, and device thereof
  • Light guide plate warping correction method, and device thereof

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Embodiment Construction

[0013] see figure 1 with figure 2 , the light guide plate warpage correction method and device provided in the embodiments of the present invention are described as follows.

[0014] The light guide plate warping correction device 100 includes a holding device 110 and a heating device 120 . The holding device 110 includes an upper pressing plate 112 , a lower pressing plate 114 and a hydraulic cylinder 116 . The upper pressing plate 112 and the lower pressing plate 114 are used to clamp the warped light guide plate 200 to be corrected ( figure 1 ) in between. The warped light guide plate 200 to be corrected may include one light guide plate or a plurality of laminated light guide plates, and this embodiment is a plurality of laminated light guide plates. The hydraulic cylinder 116 is in contact with the upper pressing plate 112 and is used for exerting a pressing force on the upper pressing plate 112 to press the upper pressing plate 112 , the light guide plate 200 and th...

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Abstract

A light guide plate warping correction method comprises the following steps: placing a warping light guide plate between an upper platen and a lower platen; stitching the upper platen, the warping light guide plate and the lower platen through utilizing an oil hydraulic cylinder against the upper platen; and winding a coin surrounding the light guide plate, wherein there is a gap between the coil and the light guide plate, an electromagnetic wave is generated after energizing the coil, the electromagnetic wave traverses through the gap and heats the warping light guide plate, and the oil hydraulic cylinder still stitches the upper platen, the warping light guide plate and the lower platen when the warping light guide plate is heated by the electromagnetic wave in order to correct the warping light guide plate. A light guide plate warping correction device comprises a holder composed of the upper platen, the lower platen and the oil hydraulic cylinder, and a heater comprising the coil.

Description

technical field [0001] The invention relates to a light guide plate, in particular to a method and a device for correcting warping of a light guide plate after injection molding. Background technique [0002] At present, IT products are all moving towards the development trend of light, thin and small, and the thickness of each component is developed and produced in a slim-type. Taking a 14-inch notebook computer as an example, an application example using LED backlight modules, in which the thickness of the light guide plate is less than 1 mm, is a big challenge for injection molding technology and warpage control after injection. [0003] The light guide plate adopting the injection molding method is easy to release the residual stress after injection and the material of the light guide plate absorbs water, etc., it is easy to cause warping after the injection molding is left still, and the warped light guide plate is assembled into the backlight module and the LCD panel. ...

Claims

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Application Information

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IPC IPC(8): B29C53/18B29L7/00
Inventor 余泰成林大为
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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