Method for implementing backlight of liquid display

Abstract

The invention discloses a method for implementing backlight of liquid display, which comprises the following steps of: virtually dividing regions on a light guide plate; typically dividing into eight regions with the same area uniformly through connecting lines of the midpoints of two sides of a rectangular light guide plate and two diagonal lines. High-power LEDs are coupled to the vertex angles of the light guide plate at a certain angle; the shape of the vertex angles of the light guide plate is not traditional right angles but W-shaped vertex angles; and the LEDs are distributed on inner sides of the W-shaped vertex angles. The power selection of the LEDs and the light guide plate divided region lattice point design are matched and have a corresponding relationship so as to better distribute the light in the whole light guide plate and improve the light coupling efficiency and light guide uniformity. The invention provides a method for implementing a W-shaped vertex angle luminous LED backlight system. The method reduces the LED number, reduces the complexity of the LED backlight system, and improves the light-emitting uniformity of the backlight system simultaneously. Because a metal radiating back plate, a metal connecting substrate and other components are positioned at the vertex angles at the periphery, the mechanical strength of the complete machine system can be strengthened to a certain degree.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display, and in particular relates to a method for realizing a backlight of a liquid crystal display. Background technique [0002] Currently, the backlight systems of LCD monitors and LCD TVs mainly include cold cathode fluorescent lamps (CCFL), external electrode fluorescent lamps (EEFL) and LEDs. Traditional CCFL and EEFL fluorescent lamps have a short lifespan, and the inert gas enclosed in the glass tube contains a small amount of mercury vapor, which is harmful to the environment. Because LED directly converts electrical energy into light energy, it has high photoelectric conversion efficiency and good energy-saving effect. LED backlight products are gradually entering industrialization, and their market share is also expanding rapidly. At present, LCD monitors and LCD TVs that use LED backlights mostly use side-lit LED backlights, that is, light enters from the upper and lower sides...

AI Technical Summary

Problems solved by technology

However, this LED installation method involves the design of the reflective cavity, the overall optical system is more complicated to realize, and there are also significant low efficiency and non-uniformity of light coupling, and the patent does not describe the matching of the design of the light guide plate, which will also make the light Not better evenly distributed throughout the LGP volume

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