Backlight module, liquid crystal display and backlight drive control method

Abstract

The invention discloses a backlight module, a liquid crystal display and a backlight drive control method. The backlight module comprises an LED backlight and a drive circuit; the LED backlight comprises an LED formed by a blue light chip, red fluorescent powder and green fluorescent powder, and an LED formed by a blue light chip, a green light chip and red fluorescent powder; the drive circuit comprises driving circuit modules driving the two LEDs respectively. The liquid crystal display comprises the backlight module and a display panel. The LED formed by the blue light chip, the red fluorescent powder and the green fluorescent powder and the LED formed by the blue light chip, the green light chip and the red fluorescent powder are combined to serve as the backlight of the liquid crystal display, different drive circuit modules drive and control the two LEDs, color showing capability of the liquid crystal display reaches Adobe 100%, and adverse effects on the integral brightness are not caused.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight module, a liquid crystal display and a backlight driving control method thereof. Background technique [0002] A traditional liquid crystal display includes a display panel and a backlight module, and the backlight module includes a backlight source and a control system. At present, the backlight is generally white LED backlight, white LED can be mainly divided into Bchip+Y powder (blue chip + yellow phosphor) LED, Bchip + Yσ powder (blue chip + red and yellow phosphor) LED, Bchip + RG powder (Blue-light chip + red-green phosphor) LED, BGchip+R powder (blue-green chip + red phosphor) LED and RGBchip (red-green-blue chip) LED, the color performance capabilities of which increase sequentially. [0003] The color performance specifications of liquid crystal displays in the industry are divided into three categories from low to high: NTSC (National Television Standards ...

AI Technical Summary

Problems solved by technology

[0010] sRGB100% can be achieved by using Bchip+RG pink LEDs, but Adobe’s 100% matching rate is far from reaching 100%. Replacing Bchip+RG pink LEDs with GBchip+R pink LEDs is one of the main methods to achieve Adobe100%, but the same Under low power consumption, the overall luminous efficiency of GBchip+R powder LED is low, compared with Bchip+RG powder LED, its luminous flux will be reduced by more than half

Although the transmittance of the color film using GBchip+R powder LEDs will be about 8% higher than that of using Bchip+RG powder LEDs, the overall brightness of the LCD still has a loss of more than 46%.

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