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Backlight module unit

A technology of backlight module and light source, which is applied in the directions of light guide, optics, optical components, etc., can solve the problems of low luminous efficiency, complicated manufacturing process of the side-emitting lens 13, and inability to weld the side-emitting lens 13, etc.

Inactive Publication Date: 2010-08-25
CPT TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Since the side-emitting lens 13 needs to be molded and manufactured by plastic injection molding, the manufacturing process of the side-emitting lens 13 is relatively complicated
[0007] 2. The luminous efficiency of the horizontal side of the existing side-illuminated backlight module 10 is lower than the luminous efficiency of the direct-lit or direct-lit modified direct-lit
[0009] 4. The side-emitting lens 13 is a plastic lens, so the side-emitting lens 13 will not pass the soldering (reflow) process of the tin furnace during the manufacturing process

Method used

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Examples

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no. 1 example

[0065]FIG. 2 is a schematic cross-sectional view of the backlight module according to the first embodiment of the present invention. In FIG. 2, only a part of the backlight module is shown for illustration. Referring to FIG. 2 , the backlight module 100 of this embodiment includes a bottom plate 110 , a light source 120 and a strip lens 130 . The light source 120 is disposed on the base plate 110 . The strip lens 130 is disposed on the base plate 110 and covers the light source 120 . Specifically, the strip lens 130 has a central top light-transmitting surface 140, a right top total reflection surface 150, a right first exit surface 152, a right second exit surface 154, and a right bottom total reflection surface. Surface 156, a right incident surface 158, a left top total reflection surface 160, a left first exit surface 162, a left second exit surface 164, a left bottom total reflection surface 166, a left incident surface surface 168 and a central bottom transparent surf...

no. 2 example

[0071] FIG. 3 is a schematic cross-sectional view of a backlight module according to a second embodiment of the present invention. Please refer to FIG. 3 , this embodiment is similar to the first embodiment, the difference between the two lies in that the backlight module 200 of this embodiment passes through the strip lens 130 in order to make the light path of the light source 120 more smoothly, and the strip lens 130 also has a right connecting surface 157 and a left connecting surface 167, wherein the right connecting surface 157 is used to connect the right incident surface 158 and the right bottom total reflection surface 156, and the left connecting surface 167 is used to connect the left and right sides. The side incidence surface 168 and the left bottom total reflection surface 166 . Therefore, the strip lens 130 can also divide the light emitted by the light source 120 into oblique lights with ideal angles and emit them to the liquid crystal display panel. However, ...

no. 3 example

[0073] FIG. 4 is a schematic cross-sectional view of a backlight module according to three embodiments of the present invention. Please refer to FIG. 4, this embodiment is similar to the first embodiment, but the difference between the two is that: the backlight module 300 of this embodiment further includes an optical film 170, and the strip lens 130 is disposed under the optical film 170 , to support the optical film 170 . Therefore, the strip lens 130 can not only increase the light uniformity of the backlight module 200 , but also serve as a support for the optical film 170 . In addition, the optical film 170 can be a diffusion sheet, a prism sheet or other optical films.

[0074] FIG. 5 is a schematic cross-sectional view of another backlight module of the present invention. Please refer to FIG. 5 , the backlight module 400 includes a plurality of light sources 120 , a plurality of strip lenses 130 and an optical film 170 . As shown in FIG. 5 , the backlight module 400...

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Abstract

The invention relates to a backlight module which comprises a substrate, a light source and a strip-shaped lens. The strip-shaped lens is provided with a central top light transmission surface and a central bottom light transmission surface, a right top total reflection surface and a left top total reflection surface, a right first emergence surface and a left first emergence surface, a right second emergence surface and a left second emergence surface, a right bottom total reflection surface and a left bottom total reflection surface, and a right incidence surface and a left incidence surface. The right top total reflection surface is connected with the central top light transmission surface configured over the light source. The right first emergence surface is connected with the right top total reflection surface. The right second emergence surface is connected with the right first emergence surface. The right bottom total reflection surface is connected with the right second emergence surface. The right incidence surface is connected with the right bottom total reflection surface. The connection of all the left components is the same with that of all the right components. The central bottom light transmission surface is positioned between the central top light transmission surface and the light source, and connected with the left incidence surface and the right incidence surface.

Description

technical field [0001] The present invention relates to a light source module, and in particular to a backlight module. Background technique [0002] The multimedia technology in today's society is quite developed, most of which benefit from the progress of semiconductor elements or display devices. As far as displays are concerned, liquid crystal displays (LCDs) with superior characteristics such as high image quality, good space utilization efficiency, low power consumption, and no radiation have gradually become the mainstream of the market. [0003] The liquid crystal display panel itself does not have the function of emitting light, so a backlight module must be arranged under the liquid crystal display panel to provide a side light source to the liquid crystal display panel. Since light emitting diodes (Light Emitting Diodes, LEDs) have advantages such as high brightness, low power consumption, long service life, and slight thermal problems, light emitting diode array...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B3/00G02B6/00G02F1/13357
Inventor 陈晏佐
Owner CPT TECH GRP