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Backlight module, manufacturing method thereof, and display device

A technology of backlight module and manufacturing method, which is applied in the direction of lighting devices, optics, light sources, etc., can solve problems such as bad stars in the sky, and achieve the effect of eliminating the phenomenon of stars in the sky

Active Publication Date: 2021-07-16
XIAMEN TIANMA MICRO ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a backlight module, a manufacturing method thereof, and a display device, so as to solve the problem of the bad phenomenon of starry sky in the display process of the backlight module in the prior art

Method used

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  • Backlight module, manufacturing method thereof, and display device
  • Backlight module, manufacturing method thereof, and display device
  • Backlight module, manufacturing method thereof, and display device

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Embodiment Construction

[0044] As described in the Background Art, the backlight module formed by MiniLED in the prior art is prone to the phenomenon of starry sky in the display process.

[0045] The inventors found that the reasons for the above phenomenon are:

[0046] See figure 1 , figure 1 A schematic top-view structure diagram of a display device provided for the prior art; in the display device 100, there will be a certain distance between adjacent LED chips 02, such as a first LED chip 02 between adjacent LED chips 02 in the X direction. A distance W, and a second distance L between two adjacent LED chips 02 in the Y direction. See figure 2 , figure 2 for the edge figure 1 The cross-sectional schematic diagram of the backlight module of the middle AA' line; wherein, the LED backlight module includes a PCB board 01, a number of LED chips 02 are arranged on the PCB board 01, and a fluorescent film 03 is arranged on the LED chips 02, and the LED chips 02 emit light. The direction is mai...

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PUM

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Abstract

The present application relates to a backlight module, a manufacturing method thereof, and a display device, wherein the backlight module includes a substrate, a plurality of LED chips, and a first film material, and a plurality of channels are arranged on the first film material. Filled with channel film materials, wherein the refractive index of the first film material is n1, and the refractive index of the channel film material is n2, n2>n1; because n2>n1, when the light emitted by the LED chip is transmitted in the channel, it can occur Total reflection, forming a transmission mode similar to an optical waveguide. The channels in the first area are all astigmatism holes; the channels in the second area are all light-gathering holes, so that the light with strong light intensity facing the LED chip can be diverged through the astigmatism hole, and the distance from the center of the LED chip is relatively small. Far light with weaker light intensity is concentrated through the light-gathering hole, so that the luminous intensity of the LED chip facing the position is equivalent to the luminous intensity between adjacent LED chips, thereby reducing or eliminating the phenomenon of starry sky.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular, to a backlight module, a manufacturing method thereof, and a display device. Background technique [0002] With the development of LED (Light-Emitting Diode, light-emitting diode) technology, the size of LED light sources used in backlight modules is getting smaller and smaller, and Mini LEDs are gradually used as light sources in backlight modules. Mini LEDs are called Micro LEDs. The predecessor of LED (Micro Light Emitting Diode, Micro Light Emitting Diode), the size is about 50 microns to 300 microns. [0003] Mini LED is an emerging branch of the current display. Through this technology, the local dimming (Local Dimming) design of the direct-lit backlight module can be realized, and the screen effect with high dynamic range (HDR) can be achieved, making the picture more delicate. At the same time, it provides a high-brightness surface light source to improve the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13357H05B44/00
CPCG02F1/133603G02F1/133606G02F1/133611G02F1/133607H05B45/10G09G3/32G09G3/3426
Inventor 王海亮郑斌义杨雁吴玲沈柏平
Owner XIAMEN TIANMA MICRO ELECTRONICS