Backlight Module Light-Adjusting Member Chromaticity Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices experience color cast issues due to chromaticity differences between the light source, light guide plate, and display panel, affecting the display effect.
Innovation Solution
A backlight module with a light-adjusting member is introduced, which measures and adjusts the chromaticity of the light guide plate to reduce the chromaticity difference between the light source, light guide plate, and display panel, using a light-adjusting member such as an adhesive or ink film to minimize color cast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide plate is used to distribute light from the light source, then the illumination uniformity is improved, but color cast occurs due to chromaticity differences between the light source, light guide plate, and display panel
Solution Approach 1:
A light-adjusting member is introduced as an intermediary component between the light source and the display panel. This member includes a light-adjusting portion with chromaticity parameters specifically designed to bridge the chromaticity gap between the light source and the display panel, thereby reducing color cast while maintaining the illumination distribution function of the light guide plate
2Object-affected harmful factors
If the chromaticity of the light source is adjusted to match the display panel, then color consistency is improved, but the light guide plate still exhibits chromaticity differences at different positions
Solution Approach 1:
The light-adjusting member is positioned specifically at the light-incident side of the light guide plate, creating a localized chromaticity adjustment zone. The light-adjusting portion has spatially varying chromaticity characteristics that compensate for the positional chromaticity differences in the light guide plate, ensuring uniform color output across the entire display area
Data Source
AI summary
A backlight module includes a light source, a light guide plate and a light-adjusting member. A light source chromaticity is measured from light generated by the light source. The light guide plate has a light-incident surface and a light-emitting surface. Light generated by the light source enters the light guide plate and emits out from the light-emitting surface. With the light-adjusting member, a first light guide plate chromaticity is measured from the light-emitting surface. There is a first difference value between the first light guide plate chromaticity and the light source chromaticity. Without the light-adjusting member, a second light guide plate chromaticity is measured from the light-emitting surface. There is a second difference value between the second light guide plate chromaticity and the light source chromaticity. The first difference value is different from the second difference value.