Backlight module

Abstract

The invention discloses a backlight module which comprises a plurality of LEDs. The LEDs are grouped into a plurality of lamp groups according to the distances between two adjacent LEDs, the plurality of LEDs are provided with a position center corresponding to a central line of a display area, the lamp groups with a larger LED distance relatively approach to the position center and have a higherbrightness level, and the lamp groups with a smaller LED distance are relatively far from the position center and have a lower brightness level. Accordingly, the luminescent conditions of the whole LEDs trend to be consistent, and the proportion of adopting the LEDs with different brightness levels is increased.

Description

【Technical field】 [0001] The present invention relates to a backlight module, in particular to a backlight module in which light emitting diodes are arranged according to the heat dissipation conditions of the positions of the light emitting diodes and the brightness level (bright bin) of the light emitting diodes. 【Background technique】 [0002] A liquid crystal display (LCD) is mainly composed of a backlight module and a liquid crystal panel. Compared with other display devices, it has the advantages of lightness, thinness, low driving voltage and low power consumption, and has been widely used in the display industry. Currently, the types of backlight modules can be mainly divided into light emitting diode (LED) backlight modules and cold cathode fluorescent tube (CCFL) backlight modules. Since LED backlight modules have the advantage of low power consumption, replacing cold cathode fluorescent tube backlight modules with LED backlight modules has become the mainstream tr...

AI Technical Summary

Problems solved by technology

Therefore, the ratio of the actual number of light-emitting diodes used to the total production quantity is too low, which relatively increases the manufacturing cost of the backlight module.

[0004] Furthermore, the LED strips currently used in backlight modules are all arranged at equal intervals. When the light strips are driven to emit light, the LEDs located in the center of the light strips are bound to be larger than those located in the center of the light strips. The light-emitting diodes at both ends of the light bar are not easy to dissipate heat. Since the temperature difference has a great influence on the luminous efficiency of the light-emitting diodes, the phenomenon of uneven heat distribution will affect the uniformity of the overall light emission of the backlight module. The light-emitting diodes in the central position also have a relatively short working life

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