Device for adjusting light mixing height of backlight module and method for adjusting light mixing height

Abstract

The invention discloses a device for adjusting the light mixing height of a backlight module and a method for adjusting the light mixing height. The device comprises a supporting mechanism and a distance measurement display system, and the supporting mechanism supports the distance between a shell of the backlight module and a diffusion plate; the supporting mechanism comprises a base, a top seat and a lifting frame, the base and the top seat are oppositely arranged, the base is fixed to the side, close to the diffusion plate, of the bottom plate, the top seat supports the diffusion plate, and a screw of the lifting frame controls the first end of the inner arm to move between the first end of the top seat and the second end of the top seat. Meanwhile, the second end of the outer arm is controlled to move between the first end of the base and the second end of the base, so that the top base is supported to move up and down, the distance measuring sensor is arranged on the top base and the base, and when the top base moves up and down, the distance between the top base and the base is measured, so that the light mixing height between the diffusion plate and the lamp panel is adjusted; and the device can adapt to lamp panels of different batches.

Description

technical field [0001] The present invention relates to the field of display technology, and more particularly, to a device for adjusting the light mixing height of a backlight module and a method for adjusting the light mixing height. Background technique [0002] With the rapid development of display technology, liquid crystal display devices (such as liquid crystal TV, liquid crystal display, liquid crystal display, etc.) The application in production and life is more and more extensive. However, the liquid crystal display device is a passive display device and cannot emit light by itself. Therefore, a backlight unit (BLU) needs to be arranged under the liquid crystal display panel to provide the required light source to achieve the display effect. The backlight module is one of the key components of the liquid crystal display device. The basic principle is to convert the commonly used point or line light into a high-brightness and uniform gray-scale surface light, so th...

AI Technical Summary

Problems solved by technology

At present, the direct type backlight needs to design the mixed light height (OD, Optical Distance) to provide a uniform and high-brightness backlight for the LCD panel. If the OD is too large, the brightness of the backlight will be low, and if the OD is too small, the backlight will cause light shadows; and the backlight After molding, the internal structure is fixed, and OD is not adjustable, resulting in low backlight yield

In the prior art, the OD value is determined through simulation and design experience, but often due to factors such as different lamp board batches and diaphragm differences, problems such as low backlight brightness or lamp shadows are caused, resulting in improper OD design.

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