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High-colour-gamut direct-type LED backlight module

A backlight module and direct-type technology, applied in the field of high-color gamut direct-type LED backlight modules, can solve the problems of difficult control and realization of dispensing volume in batch production, uneven size of quantum dots, and high cost of quantum films. Achieve uniform distribution of light-converting substances, uniform light conversion, and high market value

Active Publication Date: 2016-04-13
APT ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the wavelength of quantum dots depends on the size of quantum dots, and the size of red / green quantum dots is not uniform, and the particle size is nanoscale. It is very difficult to uniformly distribute them in the quantum film, which leads to Quantum membranes are expensive
[0007] For another example, the patent application number US2008 / 0018235A1 discloses a backlight light source that uses blue LED chips and phosphor powder packaging, but the concentration of phosphor powder required is large, and the amount of glue dispensed in batch production is difficult to control and realize, resulting in Increased production costs

Method used

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Examples

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Embodiment 1

[0055] In the high color gamut direct-lit LED backlight module provided in this embodiment, the LED chip 12 is a blue light flip chip with a wavelength of 447.5-460 nm. attached by image 3 combined with Figure 4 It can be seen that:

[0056] The first light conversion layer 13 and the transparent layer 15 are all composed of the same silica gel; wherein, the first light conversion layer 13 contains red phosphor; the microstructure shape of the transparent layer 15 is set to a zigzag shape to disperse the light, thereby Change the light field distribution; the second light conversion layer 14 contains green quantum dots with a wavelength of 540-560nm.

[0057] The rest of the structure is attached image 3 shown.

Embodiment 2

[0059] In another high color gamut direct-lit LED backlight module provided in this embodiment, the LED chip 12 is a purple light flip chip with a wavelength of 400-440 nm. attached by image 3 combined with Figure 5 It can be seen that:

[0060] The first light conversion layer 13 , the transparent layer 15 and the diffusion layer 16 are respectively composed of different material compositions. Wherein, the first light conversion layer 13 contains green fluorescent powder; the diffusion layer 16 contains diffusion powder, which is used to disperse the light; the microstructure shape of the transparent layer 15 is set to a hemispherical shape to change the light shape, thereby changing the light field. Distribution; the second light conversion layer 14 contains red quantum dots with a wavelength of 600-660 nm.

[0061] The rest of the structure is attached image 3 shown.

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Abstract

The invention provides a high-colour-gamut direct-type LED backlight module. The high-colour-gamut direct-type LED backlight module comprises a substrate, and LED chips connected with the substrate, and is characterized in that each LED chip is of an inverted structure; a first light conversion layer and a second light conversion layer which are used for converting the wavelengths of monochromatic lights are stacked above the LED chips from bottom up; and the wavelengths of the monochromatic lights converted by the first light conversion layer and the second light conversion layer are different, and an LED white light is obtained through effective mixing for the lights excited by the LED chip, the lights converted by the first light conversion layer and the lights converted by the second light conversion layer. The invention provides a direct-type LED backlight module capable of being applied to an LED television, and production control is much easily carried out on the direct-type LED backlight module, so that the colour gamut (NTSC) of the LED backlight television is greater than 100%, and then the need of a high colour gamut is met.

Description

technical field [0001] The invention belongs to the technical field of light-emitting diode (LED) backlights, and in particular relates to a high color gamut direct-lit LED backlight module. Background technique [0002] Color gamut is the method of encoding a color and also refers to the sum of colors that a technical system can produce. In computer graphics processing, a color gamut is a complete subset of colors. The most common application of color subsets is to accurately represent a given situation, such as a given color space or a certain output The color rendering range of the device. [0003] Light-emitting diode (LED) light source has the advantages of high efficiency, long life, and no harmful substances such as Hg. With the rapid development of LED technology, the brightness and life of LED have been greatly improved. Therefore, today's light-emitting diodes (LED) light sources have begun to be widely used in the technical field of backlighting of television se...

Claims

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Application Information

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IPC IPC(8): F21S8/00F21V9/16F21V19/00F21Y115/10
CPCF21S8/00F21V9/30F21V19/00
Inventor 万垂铭姜志荣姚述光区伟能朱文敏曾照明肖国伟
Owner APT ELECTRONICS