Ultra-high brightness LED matrix straight-downward backlight module applied to large-scale LCD

Abstract

The invention discloses an ultra-high brightness LED matrix straight-downward backlight module applied to a large-scale LCD which has a size of more than 32 inchs. In an LED matrix module six LEDs are connected in series into a straight row, and LED are arranged longitudinally and transversally to form a square matrix; the length and the row number of a printed circuit board (PCB) extends all along to both sides of a screen visible area of the LCD in the arrangement and combination mode and correspondingly adjusts according to the size of the screen so that the arrangement area of an LED matrix is consistent with a display area of the LCD; LEDs the surfaces of which are welded and packaged with 5.0*5.0mm or 3.5*2.8mm three-core gold-white high-brightness overhead light are selected, color coordinate values are: X: 0.303 and Y:0.293 and a brightness value is more than 7000 mcd and is graded by 0.1V to ensure the consistency of low-brightness work; and a distance between two LEDs is 15.6-16.5mm, every six LEDs are connected in series into a straight row, and a distance between two straight rows is 15.6-16.5mm. The straight-downward ultra-high backlight module manufactured by applying an LED matrix improves the brightness higher than 1200 LUH, not only satisfies the requirement for visual brightness under outside sunshine, but also solves the problems of overlarge power and overheating, and the LED matrix has brightness with a large controllable range and is energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to an LCD backlight module, in particular to an ultra-high-brightness LED matrix direct-lit backlight module applied to a large-size LCD. Background technique [0002] At present, the backlight for large-size LCD-TV widescreen above 26 inches is mainly a direct-lit backlight with 16~24 CCFL multi-lamp tubes, with a brightness range of 500 lumens. Some manufacturers have developed three-color LED direct-lit backlights for The 32-inch and 42-inch LCD-TV widescreens have improved color saturation, but the brightness range is around 500 lumens, which cannot meet the requirements of high-brightness environments that can be seen outdoors under sunlight. [0003] The backlight module of large-size LCD screen is mainly composed of light source (CCFL or LED), fog plate (translucent acrylic plate), optical reflective film and enhancement film, plastic frame and metal frame. At present, the mainstream LCD-TV widescreens on the market all us...

AI Technical Summary

Problems solved by technology

However, only a few companies in the world currently have such products. In China, BOE and Hisense currently have three-color LED direct-lit backlights, and ultra-bright LED direct-lit backlights have not yet been launched on the market. The main reasons are high cost, high uniformity and brightness. Less than required, serious overheating problem

[0006] On large LCD-TV screens above 26 inches, the brightness of the products launched by various manufacturers is standard 500 lumens, and a few models such as Samsung have 600-700 lumens, and the brightness cannot meet the display requirements for outdoor strong light environments. ;In order to increase the brightness by increasing the number of lamp tubes, we must first solve the supporting high-power and high-voltage inverter power supply, and increasing the number of lamp tubes produces high power consumption and high heat, which will cause great problems in outdoor high-temperature environment applications, especially outdoor sunlight Under the irradiation, the situation is even worse, and the screen will soon turn black due to the high temperature caused by the high temperature of the backlight and the heat absorption of the sun, and cannot display normally; and for the super large LCD screen above 52 inches, the high-power ultra-high voltage for the long lamp tube The development, design and production of inverter power supply requires high technical ability, and the cost is also very high. There is no related product in China at present, and it is provided by the original manufacturer of LCD large screen together with LCD panel.

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