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Backlight source and application of OFED structure with composition of organic green light photoluminescence materials and organic red light photoluminescence materials

A photoluminescence and backlight technology, applied in the field of backlight with OFED structure, can solve the problems of inability to cover the NTSC color gamut, color reproduction degree and color purity difference, etc., to improve color purity, improve color rendering index, reduce The effect of energy loss

Inactive Publication Date: 2018-01-23
深圳市欧弗德光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] To sum up, neither LED nor OLED backlight LCD display can cover the entire NTSC color gamut, resulting in poor color reproduction and color purity, and it is impossible to avoid a large amount of short-wavelength blue light in the light source that seriously damages human vision.

Method used

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  • Backlight source and application of OFED structure with composition of organic green light photoluminescence materials and organic red light photoluminescence materials
  • Backlight source and application of OFED structure with composition of organic green light photoluminescence materials and organic red light photoluminescence materials
  • Backlight source and application of OFED structure with composition of organic green light photoluminescence materials and organic red light photoluminescence materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] An LCD display device comprising an LCD panel, an LED-based backlight module and a driver IC, wherein,

[0073] The LED-based backlight module includes a backplane, a backlight arranged on the backplane, and a diffusion plate arranged above the backlight:

[0074] like figure 2 As shown, the backlight includes a PCB board 4 and an LED light emitting device arranged on the PCB board 4, and the LED light emitting device includes a blue LED chip 5 and a photoluminescent layer arranged above it;

[0075] The photoluminescent layer is an encapsulant 2 coated above the LED chip. The encapsulant 2 is loaded in the luminescent cup 1 with a coating thickness of 0.3 mm. The encapsulant 2 is evenly doped with organic green light. Photoluminescent materials and organic red photoluminescent materials3.

[0076] The emission wavelength of the blue LED chip is 460nm.

[0077] The emission wavelength of the organic green light photoluminescence material is 515nm.

[0078] The emis...

Embodiment 2

[0086] An LCD display device comprising an LCD panel, an LED-based backlight module and a driver IC, wherein,

[0087] The LED-based backlight module includes a backplane, a backlight arranged on the backplane, and a diffusion plate arranged above the backlight:

[0088] like figure 2 As shown, the backlight includes a PCB board 4 and an LED light emitting device arranged on the PCB board 4, and the LED light emitting device includes a blue LED chip 5 and a photoluminescent layer arranged above it;

[0089]The photoluminescent layer is an encapsulant 2 coated above the LED chip. The encapsulant 2 is loaded in the luminescent cup 1 with a coating thickness of 0.3 mm. The encapsulant 2 is evenly doped with organic green light. Photoluminescent materials and organic red photoluminescent materials3.

[0090] The emission wavelength of the blue LED chip is 465nm.

[0091] The organic green photoluminescent material is (E)-4-((cyanobenzylidene)amino)benzoic acid (for its prepara...

Embodiment 3

[0097] It is basically the same as Example 2, the only difference is that the mass ratio of the silica gel, the organic green photoluminescent material and the organic red photoluminescent material is 1:0.0005:0.0002.

[0098] The LCD display device described in this embodiment is a backlight of a full-color liquid crystal display. After using the backlight of this embodiment, the NTSC color gamut is as high as 93%.

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Abstract

The invention relates to a backlight source with an OFED structure with composition of organic green light photoluminescence materials and organic red light photoluminescence materials and a display device. The backlight source comprises a PCB board and a plurality of LED luminescent devices which are arranged on the PCB board, each LED luminescent device comprises an LED chip and a photoluminescence layer which is arranged above the LED chip, and each photoluminescence layer comprises one or more kinds of organic green light photoluminescence materials and one or more kinds of organic red light photoluminescence materials. The invention further discloses the LED display device which comprises the backlight source. Compared with a traditional white light LED backlight source, on one hand,different organic photoluminescence materials are matched with each other, the color rendering index and color purity of spectrum are improved; on the other hand, a blue light LED chip which is largerthan 460 nanometers is adopted, the harm of blue light to the human eyes is lowered, and a healthy light source is achieved in the true sense. According to the technical scheme, the backlight sourcebrings significant innovation and revolution to the fields such as daily illumination, light sources and liquid crystal backlight sources.

Description

technical field [0001] The invention relates to the technical field of backlight sources for full-color displays, in particular to a backlight source with an OFED structure containing an organic green photoluminescent material and an organic red photoluminescent material composition and its application in full-color display. Background technique [0002] Since the invention of the incandescent lamp, the development of electric light source technology has a history of more than 100 years. Among them, Light emitting diode (LED) technology has the advantages of low power consumption, long life, and easy recycling. It is recognized as the best light source in the future, and has won the favor of the market and consumers in the field of flat-panel displays. [0003] LCD is currently the most widely used flat-panel display technology. For commonly used LCD displays, such as mobile phones, TV screens, etc., the backlight is generally provided by LEDs. Traditional white LED backlig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13357
CPCG02F1/133603G02F1/133606G02F1/133621G02F1/133614H01L33/504H01L33/507H01L2933/0041
Inventor 陈志宽武博李晗
Owner 深圳市欧弗德光电科技有限公司
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