Quantum dot light-emitting component, backlight module and display device

Abstract

The embodiment of the invention provides a quantum dot light-emitting component, a backlight module and a display device, relating to the field of photoelectric devices. On the premise of not increasing the volume of the component, the absorption loss in a light transmission process is reduced; and the light output efficiency of the quantum dot light-emitting component is increased. The quantum dot light-emitting component comprises a support frame, an excitation light source, a first reflecting layer and a quantum dot layer, wherein the support frame is shaped as a groove; the excitation light source is arranged at the bottom of the groove in the support frame and used for emitting excitation light; the first reflecting layer is arranged on the side wall of the support frame and used for reflecting the excitation light emitted on the side wall of the support frame by the excitation light source; the quantum dot layer is arranged at the opening of the groove of the support frame and emits light by being excited by the excitation light; and the excitation light source, the quantum dot layer and the support frame are packaged together so as to form an integral closed structure. The embodiment of the invention is used for manufacturing the quantum dot light-emitting component.

Description

technical field [0001] The invention relates to the field of optoelectronic devices, in particular to a quantum dot light-emitting element, a backlight module and a display device. Background technique [0002] Currently the most common LCD TVs on the market, the color gamuts they can display are generally not large, and their display color gamuts are generally around 68% to 72% NTSC (English full name: National Television Standards Committee, Chinese abbreviation: National Television Standards Committee) standard, Therefore, a good color effect cannot be provided. With the improvement of consumers' requirements for image quality, high color gamut backlight technology is becoming the focus of research in the industry. The color gamut of ULED (UltraLightEmittingDiode, extreme light-emitting diode) products can reach more than 85% NTSC, the color expression is outstanding, and the market response is better. A higher color gamut is the development direction of the next generat...

AI Technical Summary

Problems solved by technology

[0003] Currently, the backlight solution that can achieve the highest color gamut in the industry is the solution that blue light excites quantum dot materials to produce white light, and the color gamut can reach 100% NTSC or more. However, if figure 1 A quantum dot LED is shown, comprising a support frame (1), a light-emitting chip (2) arranged at the bottom of the tank of the support frame (1), and a quantum dot layer (3) arranged at the top opening of the support frame (1) A silica gel layer (not shown in the figure) is encapsulated between the light-emitting chip (2) and the quantum dot layer (3). Due to the poor thermal stability of the quantum dot material, the excitation efficiency drops rapidly or even fails when the temperature is higher than 120°C. The silicone layer must be thick enough to prevent quantum dots from failing

Therefore, common techniques such as figure 1 The packaging structure is shown. In this packaging structure, since the light-emitting chip (2) has a certain light-emitting angle, it reaches the quantum layer after passing through a certain thickness of silica gel layer, wherein the large-angle light i emitted from the light-emitting chip (2) is irradiated on the support frame (2 The reflected light o on the side wall of ) is used to excite the quantum dot layer to generate white light, while the large-angle light i is irradiated on the side wall of the support frame (2) and is partially absorbed, so that the light that actually excites the quantum dot layer is relatively less, and most of the light will concentrate to excite the quantum dot layer (3) in the middle area, and the light in the edge area is less, which ultimately leads to the low luminous efficiency of the quantum dot light-emitting element made of quantum dots

In this package structure, in order to improve the reflectivity, it is usually possible to control a smaller θ angle to improve the reflectivity, but the smaller the θ angle, the larger the volume of the quantum dot light-emitting device, which is not conducive to the miniaturization of the device

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