LED light source module with heat guiding system and radiation system

Abstract

The present invention is an LED light source module with a heat conduction system and a heat dissipation system, which is used in a direct type BLU. It includes a circuit board and is electrically connected to a plurality of LEDs. The light emitted by the LEDs passes through a light diffusion element, and then Irradiated on the LCD; the other side of the circuit board is provided with a light reflection element that reflects the leaked light of the LED back, and the above elements are all covered in a housing; wherein: a layer of heat-conducting and light-transmitting material is covered on the LED , and between the heat-conducting and light-transmitting material and the light diffusion element, a heat-insulating and light-transmitting element is also provided, a heat dissipation space is formed between the heat-insulating and light-transmitting element and the heat-conducting and light-transmitting material, and the shell At least two air convection holes are formed relative to the heat dissipation space. In this way, the heat emitted by the LED can be transmitted and dissipated as soon as possible, the temperature inside the LED light source module can be reduced, the color balance of the module can be stabilized, and the service life of the module can be prolonged.

Description

technical field [0001] The invention relates to a direct type LED backlight module. Background technique [0002] Liquid crystal display devices (LCD) are widely used in very broad fields such as computer liquid crystal display screens, liquid crystal televisions, and outdoor advertisements. However, the LCD itself does not emit light, but relies on the backlight unit (BLU) provided under the LCD to provide a light source. By controlling the pixel electrodes on the LCD, color images with different brightness, different colors and different gray scales are formed. So BLU is one of the key components of LCD. [0003] According to the position of the light source, the BLU is divided into direct type BLU (the light source is placed under the backlight module) and side-light type BLU (the light source is placed on the side of the backlight module); according to the light source component, it is divided into light-emitting diode (LED) and cold cathode ray tube ( CCFL) etc. BLU. ...

AI Technical Summary

Problems solved by technology

[0006] 1. Since the general light diffusion element 13 does not have heat insulation effect, the heat of the LED will be transferred to the LCD14, causing the temperature of the LCD14 to be too high, affecting the display effect and service life of the LCD14

[0007] 2. Since the LED12 is installed in a closed space, the heat is difficult to dissipate, so that the temperature of the LED12 is relatively high, and the high temperature will cause inconsistent changes in the brightness of R, G, and B, which will affect the color balance of the BLU and affect the brightness of the LED12. service life

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