LED light bar, backlight source and display device

Abstract

The invention provides an LED light bar, a backlight source and a display device. The LED light bar comprises a circuit board and a plurality of LEDs which are arrayed on the circuit board along the first straight line at intervals. A gap is formed between every two adjacent LEDs. The LED light bar, the backlight source and the display device are characterized in that at least part of projections, on the first projection face, of every two adjacent LEDs overlap, and the first projection face is a face which is perpendicular to the circuit board and parallel to the first straight line. According to the LED light bar, at least part of projections, on the first projection face, of every two adjacent LEDs overlap, the gaps can be covered in the direction perpendicular to the circuit board, when the LED lamp bar is applied to the backlight source, after the LEDs emit light, at least part of incident light exists at the positions, corresponding to the gaps of the LEDs, of a light guide plate, and therefore light can be mixed in the vertical direction when transmitted on the light guide plate, light is sufficiently mixed, and the phenomenon that luminous flux at gap positions of a traditional LED lamp bar is not enough is eliminated, and the hotspot phenomenon is reduced.

Description

technical field [0001] The invention relates to the technical field of liquid crystal modules, in particular to an LED light bar, a backlight source and a display device. Background technique [0002] Such as figure 1 As shown, the backlight of a traditional liquid crystal module includes an LED light bar 10 and a light guide plate 20, etc., wherein the light guide plate 20 includes a light incident surface 21, a light exit surface 22 adjacent to the light incident surface 21, and a light exit surface adjacent to the light incident surface 21. On the bottom surface 23 opposite to the light-emitting surface 22, the LED light bar is arranged on the light-incident surface 21 side of the light guide plate 20, and the light emitted by the LED enters the light guide plate 20 to form total reflection and propagates in the light guide plate 20. When reaching the dots on the bottom surface 23 of the light guide plate 20, diffuse reflection occurs, which changes the original light pr...

AI Technical Summary

Problems solved by technology

like image 3 As shown, the position of the gap 30 between adjacent LEDs 12 has no light that can be incident on the light guide plate 20, resulting in the output of the side of the light guide plate 20 that is close to the LED light bar at the position corresponding to the gap 30 between adjacent LEDs. There is less light, forming an area whose brightness is darker than the surrounding area, resulting in the phenomenon of hotspot (firefly) appearing on the display screen of the LCD module.

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