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Direct-lit backlight module and display device using same

A backlight module and direct-type technology, applied in the field of direct-type backlight modules and display devices using the same, can solve problems such as poor light expansion and aberration

Inactive Publication Date: 2015-08-12
INNOCOM TECH (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the height of the cavity is small, the diffusion of light after passing through the diffusion film is not good, and aberration problems are prone to occur

Method used

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  • Direct-lit backlight module and display device using same
  • Direct-lit backlight module and display device using same
  • Direct-lit backlight module and display device using same

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Embodiment Construction

[0052] As used herein, "adjacent" means close to or joined together. Adjacent elements may be separated from each other or directly connected to each other.

[0053] Please refer to figure 1 and figure 2 , figure 1 A cross-sectional view illustrating a direct-type backlight module according to an embodiment of the present invention, figure 2 draw figure 1 A perspective view of the first lens sheet. The direct type backlight module 100 includes several light emitting diodes 102 , a first lens sheet 104 , a second lens sheet 106 , a first prism sheet 108 and a second prism sheet 110 . The second lens sheet 106 is arranged adjacent to the first lens sheet 104 , the first prism sheet 108 is arranged adjacent to the second lens sheet 106 , and the second prism sheet 110 is arranged adjacent to the first prism sheet 108 .

[0054] By the design of the first lens sheet 104 and the second lens sheet 106 stacked up and down, the light diffusion range can be increased, and by th...

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Abstract

The invention discloses a direct type backlight module and a display device using the same. The direct type backlight module comprises a plurality of light-emitting diodes, a first lens sheet, a second lens sheet, a first prism sheet and a second prism sheet. The distance between two adjacent light-emitting diodes along a first axial direction is S1, and the distance between two adjacent light-emitting diodes along a second axial direction is S2. The first lens sheet is arranged adjacent to light-emitting diodes and is provided with a plurality of first columnar protruding structures, and first columnar protruding structures extend along the first direction. The second lens sheet is arranged adjacent to the first lens sheet and is provided with a plurality of second columnar protruding structures, second columnar protruding structures extend along the second direction, and an included angle A1 is formed by the first direction and the second direction. The first prism sheet is arranged adjacent to the second lens sheet. The second prism sheet is arranged adjacent to the first lens sheet. The ratio of the distance S2 to the distance S1 is represented as S2 / S1=sin (A1) / (1+cos(A1)).

Description

technical field [0001] The present invention relates to a direct-type backlight module and a display device using the same, and in particular to a direct-type backlight module with a lens sheet group and a prism sheet group and a display device using the same. Background technique [0002] The function of the diffusion film is to provide a uniform surface light source for the liquid crystal display. Generally, the traditional diffusion film mainly adds chemical particles into the diffusion film substrate as scattering particles. However, under this framework, due to the optical properties of the chemical particles, the chemical particles absorb light and cause a relatively high brightness loss. [0003] In addition, in order to reduce the thickness of the direct-type backlight module, the distance (cavity height) between the diffusion film of the direct-type backlight module and the light-emitting diode (light-emitting diode, LED) light source is usually not too large. How...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357F21Y101/02
Inventor 谢旭明
Owner INNOCOM TECH (SHENZHEN) CO LTD
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