Line light source, backlight module and display device

Abstract

The invention relates to the technical field of display, in particular to a line light source, a backlight module adopting the line light source and a display device adopting the backlight module. The line light source comprises an elliptic cylinder type light guide rod and a point light source, wherein the point light source is arranged at the end of the elliptic cylinder type light guide rod. According to the line light source, the elliptic cylinder type light guide rod is arranged, and the point light source is arranged at the end of the elliptic cylinder type light guide rod which is used for converting light which passes through the point light source in an incident mode into the line light source. Due to the utilization of the elliptic cylinder type light guide rod, light can be diffused to a larger angle, when the line light source is applied to the backlight module, on the premise that display quality is guaranteed, the light mixing distance can be further reduced, the thickness of the backlight module can be reduced, and a powerful technical support is provided for achieving the ultra-thin direct type display device.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a line light source, a backlight module using the line light source, and a display device using the backlight module. Background technique [0002] Compared with traditional cathode ray tube display devices, flat panel display devices have the advantages of thinness, low driving voltage, no flickering and long service life; flat panel display devices are divided into active light-emitting display devices and passive light-emitting display devices; for example, thin film transistor liquid crystal The display device (Thin Film Transistor-Liquid Crystal Display, TFT-LCD) is a passive light-emitting display device, which is widely used in TVs, In electronic products such as mobile phones and display devices, the flat panel display field has already occupied a dominant position. [0003] Since the display panel of the liquid crystal display device does not emit light itself, a backl...

AI Technical Summary

Problems solved by technology

Because in the side-type backlight module, the light source is arranged on both sides of the optical film material, and in the direct-type backlight module in the prior art, for example, figure 1 As shown, the light source is a line light source including a cylindrical light guide rod 11 and a point light source 21 arranged at the end of the cylindrical light guide rod. Keep a certain distance between the materials 32, that is, the light mixing distance H1; therefore, the obvious disadvantage of the direct-type backlight module compared with the side-type backlight module is that the appearance is thicker, which leads to the direct-type display device using the direct-type backlight module. It is difficult to further reduce the thickness

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