Check patentability & draft patents in minutes with Patsnap Eureka AI!

Direct Type Backlight Module

A backlight, direct type technology, applied in the field of direct type backlight modules, can solve the problems of long light mixing distance and inability to achieve an ideal thickness, and achieve the effect of reducing the overall thickness, good light mixing effect, and sufficient light mixing.

Inactive Publication Date: 2011-12-21
EPILIGHT TECH +2
View PDF5 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a direct-type backlight module to solve the problem in the prior art that the light mixing distance in the vertical direction is relatively long, resulting in the problem that the direct-type backlight module using LED grains cannot achieve the desired thickness.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Direct Type Backlight Module
  • Direct Type Backlight Module
  • Direct Type Backlight Module

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0025] see figure 2 , shows a side sectional view of the direct type backlight module of the present invention in the first embodiment. like figure 2 As shown, the direct-type backlight module includes: a backplane 201; a printed circuit board (not shown in the drawings) arranged on the backplane 201, and the printed circuit board includes a circuit design distribution and an aluminum substrate heat dissipation slats (not shown in the drawings); an LED array arranged on the printed circuit board, the LED array is composed of a plurality of LED dies 202; on the printed circuit board, the LED array A reflective film 203 is arranged above the surface light source, and the reflective film 203 has a cavity (not marked in the drawings) whose position corresponds to that of the LED crystal grain 202 for the LED grain 202 to pass through. The reflective surface of the reflective film 203 It includes a reflection plane 203a, a reflection concave-convex surface 203b connected to the...

no. 2 example

[0030] see image 3 , shows a side sectional view of the direct type backlight module of the present invention in the second embodiment. like image 3 As shown, the direct-type backlight module includes: a back plate 301; a reflective film 303, the reflective film 303 includes a reflective plane 303a and a reflective concave-convex surface 303b that is connected to the reflective plane 303a and protrudes relative to the reflective plane 303a; An LED array composed of LED dies 302; a diffusion plate 304; a diffusion film 305; and a brightness enhancement film 306, etc.

[0031] In particular, in the second embodiment, the reflective surface in the reflective film 303 includes a reflective plane 303a and a protruding reflective concave-convex surface 303b (a trapezoidal reflective surface that forms a certain inclined angle with the reflective plane 303a), wherein the The shape of the trapezoidal reflective surface 303b is indeterminate, and can be any one of a common trapezoi...

no. 3 example

[0034] see Figure 4 , shows a side sectional view of the direct type backlight module of the present invention in the third embodiment. like Figure 4 As shown, the direct-type backlight module includes: a back plate 401; a reflective film 403, the reflective film 403 includes a reflective plane 403a and a reflective concave-convex surface 403b that is connected to the reflective plane 403a and protrudes relative to the reflective plane 403a; An LED array composed of LED dies 402; a diffusion plate 404; a diffusion film 405; and a brightness enhancement film 406, etc.

[0035] In particular, in the third embodiment, the reflective surface in the reflective film 403 includes a reflective plane 403 a and a protruding reflective concave-convex surface 403 b (concave reflective curved surface forming a certain oblique angle with the reflective plane 403 a ). Wherein, the shape of the concave reflective curved surface 403b is indeterminate, and may be a common arc or other multi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a direct type backlight module, comprising: a backplane, a printed circuit board, an LED array with a plurality of LED crystal grains, a reflective film, a diffusion plate, a diffusion film, and a brightness enhancement film; wherein, the reflective The film includes a reflective concave-convex surface which is connected to the reflective plane and protrudes relative to the reflective plane. Compared with the prior art, the reflective film in the direct-lit backlight module of the present invention is non-planar, which relatively increases the reflective area, so that the light emitted by the LED crystal grains can be more fully mixed in a smaller space, and better results can be obtained. light mixing effect.

Description

technical field [0001] The invention relates to a liquid crystal display device, in particular to a direct-down backlight source module using a non-planar reflective film. Background technique [0002] At present, a liquid crystal display device (Liquid Crystal Display hereinafter referred to as LCD) has become the mainstream in the field of flat panel display. Since the liquid crystal display itself does not emit light, the backlight module is one of the key components of the LCD. The function of the backlight module is to provide sufficient brightness and uniform distribution of light so that it can display images normally. The current LCD backlight is mainly cold cathode tube CCFL and light emitting diode LED. As a new type of backlight, LED has many obvious advantages compared with the traditional CCFL backlight: LED backlight has a better color gamut, the internal driving voltage of LED is much lower than that of CCFL, the brightness adjustment range is large, power co...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F21S8/00F21V7/04F21V7/22G02F1/13357F21Y101/02
Inventor 范曼宁张国义陈云峰张义荣张洋张黎鑫
Owner EPILIGHT TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com