LED light source, lateral incident backlight module and liquid crystal display device

Abstract

The invention discloses an LED light source. The LED light source comprises a printed circuit board and an LED luminous body, wherein a baffle wall is arranged on the printed circuit board; the bafflewall comprises a baffle wall body and a baffle wall extension part which are connected; the baffle wall is arranged on the four side faces of the LED luminous body in a surrounding mode; the baffle wall extension part extends and protrudes out of the upper surface of the LED luminous body on one side of the LED luminous body. The invention further discloses a lateral incident backlight module. The lateral incident backlight module comprises a backboard, a light guide board and the LED light source, wherein the light guide board and the LED light source are arranged on the backboard, and the LED light source is located on the side face of the light guide board. The baffle wall extension part is located on the side, far from the backboard, of the LED luminous body. Moreover, The invention further discloses a liquid crystal display device comprising the lateral incident backlight module.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to an LED light source, and also to a side-entry backlight module and a liquid crystal display device including the LED light source. Background technique [0002] Liquid Crystal Display (LCD) is a flat and ultra-thin display device, which consists of a certain number of color or black and white pixels, and is placed in front of a light source or a reflective surface. Liquid crystal displays have low power consumption, high image quality, small size, and light weight, so they are favored by everyone and become the mainstream of displays. Most of the liquid crystal displays on the existing market are backlight liquid crystal displays, including a liquid crystal display panel and a backlight module. The liquid crystal display panel and the backlight module are arranged opposite to each other. Display the image. [0003] A liquid crystal display panel usually consists ...

AI Technical Summary

Problems solved by technology

The backlight of traditional liquid crystal display devices adopts cold cathode fluorescent lamps (CCFL), but due to the poor color reproduction ability of CCFL backlight, low luminous efficiency, high discharge voltage, poor discharge characteristics at low temperature, and long time for heating to reach a stable gray level, etc. Disadvantages, the backlight technology using LED backlight has been developed, the most common of which is the LED side-type backlight, the LED light source is set on the side of the light guide plate

[0004] For side-lit LED backlights, since LEDs emit Lambertian light, the light emitted at a large angle does not enter the light guide plate, but directly exits at an oblique upward angle and enters the upper diaphragm, causing light leakage. There is a problem of bright lines on the light-incident side in the display screen, resulting in poor display quality of the display device

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