LED lighting device for display module and display module

Abstract

The embodiment of the invention provides an LED lighting device for a display module and the display module, relates to the technical field of display, and aims at increasing the utilization rate of the light emitted by an LED lamp as well as improving the lighting effect of the LED lighting device. The LED lighting device comprises a quantum dot film, a reflective filter layer and at least one LED lamp; the quantum dot film is arranged between the LED lamp and the reflective filter layer; the lights emitted by the LED lamp are used for exciting quantum dot materials packaged in the quantum dot film and generating white backlight; the reflective filter layer is used for reflecting lights at the preset band and transmitting the lights outside the preset band; the lights at the preset band are the lights at part of the band of the lights emitted by the LED lamp. The LED lighting device is applied to a liquid crystal display.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an LED light-emitting device for a display module and a display module. Background technique [0002] Color gamut, as an index to measure the color performance capability of liquid crystal display, has attracted more and more attention. In order to meet the requirement of high color gamut, in the prior art, blue LEDs (Light Emitting Diodes, light emitting diodes) are generally used to excite quantum dots (Quantum Dot, QD) materials to generate white light, and the color gamut can reach more than 100%. [0003] Quantum dots are photoluminescent crystalline semiconductors whose color is determined by their size. Because the quantum dot material will fail when it is affected by high temperature and oxygen, the quantum dot material is usually encapsulated in the film in the prior art to form a quantum dot film, and the quantum dot film is used in the backlight module of the liquid ...

AI Technical Summary

Problems solved by technology

However, due to the low concentration of quantum dot materials in the quantum dot film, the gap between adjacent quantum dot materials will be relatively large. Taking the blue light LED as an example, the complementary color light of blue light is red light and green light. The blue light LED When the emitted blue light passes through the quantum dot film, relatively more blue light will pass through the gap between adjacent quantum dot materials, and only a small part of the blue light will excite the quantum dot material to produce red light and green light that mix with blue light to form white light. light, which results in lower utilization of blue light

At the same time, due to the excessive blue light transmission, the proportion of blue light in the mixed white light is relatively large, while the proportion of red light and green light is relatively small, causing the overall white light produced by the mixture to be bluish, which affects the performance of LED light-emitting devices. glow effect

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