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Backlight device and manufacturing method thereof

A technology for a backlight device and a manufacturing method, applied in optics, nonlinear optics, instruments, etc., can solve problems such as light extraction efficiency decline and light energy loss

Pending Publication Date: 2019-02-01
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with conventional backlight products and OLED display technology, Mini LED still has some gaps in terms of light extraction efficiency, uniformity of light mixing, and cost.
For example, in the case of a direct-lit backlight structure where Mini LEDs are fabricated on printed circuit boards or flexible circuit boards, due to the difference in refractive index, part of the light from the surface light source is restricted between the film and the substrate and cannot exit. The multiple reentry between them leads to the loss of light energy and the decrease of light extraction efficiency

Method used

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  • Backlight device and manufacturing method thereof
  • Backlight device and manufacturing method thereof
  • Backlight device and manufacturing method thereof

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Embodiment Construction

[0020] In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments of the present invention are exemplified below and described in detail in conjunction with the accompanying drawings. Furthermore, the directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., It is only for orientation with reference to the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, but not to limit the present invention.

[0021] The backlight device of the present invention can be mainly used as a backlight source for general flat display screens. Please refer to figure 1 as shown, figure 1 is a schematic cross-sectional view of a backlight device according to an embodiment of the present invention. The backlight device mainly includes a substrate 10 , an LED layer 20 and a band...

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Abstract

The invention relates to a backlight device and a manufacturing method thereof. The backlight device comprises a substrate, an LED layer and a bandpass optical filter, the LED layer is arranged on thesubstrate and comprises multiple LED chips arranged separately. The bandpass optical filter is arranged on the LED layer, and provided with holes in positions corresponding to the LED chips.

Description

【Technical field】 [0001] The invention relates to the display field, in particular to a backlight device and a manufacturing method thereof. 【Background technique】 [0002] Mini LED (submillimeter light-emitting diode) is a light-emitting diode with a size between traditional LED and Micro LED. It is a strong competitor of OLED display technology in the future market. It has high brightness and can be made on flexible and On curved substrates, it can be applied to high dynamic contrast ratio display technology, narrow frame display technology, special-shaped display technology and many other advantages, which have become market research hotspots. However, compared with conventional backlight products and OLED display technology, Mini LED still has some gaps in terms of light extraction efficiency, light mixing uniformity, and cost. For example, in the case of a direct-lit backlight structure where Mini LEDs are fabricated on printed circuit boards or flexible circuit boards...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L25/075H01L33/58
CPCH01L25/0753H01L25/50H01L33/58H01L2933/0058H01L33/46H01L2933/0091G02F1/133603H01L2933/0025G02F1/133605G02F1/133606G02F1/133611H01L33/62H01L2933/0066
Inventor 杨勇
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD