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Direct down type back light module

A backlight module, direct type technology, used in optics, nonlinear optics, lighting devices, etc., can solve the problem of unhelpful dark areas, and achieve the effect of improving the uniformity of the picture

Active Publication Date: 2010-03-17
NANJING CEC PANDA LCD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the diffuse reflection sheet can improve the light utilization rate, it is not helpful to improve the dark area because of the diffuse reflection and uniform reflection.

Method used

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Examples

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] figure 2 It is a schematic diagram of the direct type backlight module and its backlight reflection of the present invention.

[0018] Please refer to figure 2 , the backlight module of the present invention includes a diffuse reflection sheet 1, a plurality of parallel and equidistant cold cathode lamp tubes 2 and a diffuser plate 3, the light emitted by the cold cathode lamp tubes 2 is irradiated by the diffuse reflection sheet 1 or directly to Diffusion plate3. Wherein, a specular reflection sheet 4 is also arranged on the diffuse reflection sheet 1, and the specular reflection sheet 4 is attached on the diffuse reflection sheet 1, and the specular reflection sheet 4 is distributed in intervals to reflect light to a dark area, so as to Improve picture uniformity.

[0019] image 3 It is a schematic diagram of the attaching position of t...

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Abstract

The invention discloses a direct illumination-type backlight module which comprises a divergence plate, a plurality of lamp tubes distributed under the divergence plate and a diffuse reflection platearranged on the bottom part; wherein, a mirror reflection plate is adhered on the diffuse reflection plate. The direct illumination-type backlight module effectively improves the light utilization rate and the image uniformity.

Description

technical field [0001] The invention relates to a backlight module, in particular to a direct type backlight module. Background technique [0002] Liquid crystal display (LCD) uses the change of the electric field strength applied to the liquid crystal molecules to change the orientation of the liquid crystal molecules to control the intensity of light transmission to display images. Generally speaking, a complete liquid crystal display panel must have a backlight module, a polarizer, a TFT (thin film transistor) lower substrate, a CF (color filter) upper substrate, and a liquid crystal molecule layer filled in a box composed of two substrates. The liquid crystal substrate itself cannot emit light, and needs to be provided by a backlight source. A backlight usually consists of a backplane, a light source, a diffusing plate, and various optical films. At present, backlight sources are generally divided into two types: direct type and side light type. In the structure of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21V7/04F21V7/09F21V5/08G02F1/13357
Inventor 李郑阳
Owner NANJING CEC PANDA LCD TECH
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