Backlight Module Brightness Uniformity Border Compensation
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Solution Overview
Problem
Conventional video display devices with tiled panels suffer from reduced light reachability near borders, resulting in darker video segments due to independent backlight modules for each panel, leading to uneven brightness across the display.
Innovation Solution
A backlight module that controls light distribution across the video display area by varying lighting values among different areas, ensuring the border regions receive more light than central regions, using a combination of linear and circular lenses to maintain consistent brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If independent backlight modules are used for each display panel, then each panel can be controlled independently, but light from light sources hardly reaches areas near the borders, making border parts darker
Solution Approach 1:
The backlight module divides the video display area into multiple regions (first area near borders, second area away from borders) and controls light irradiation differently for each region. The light irradiation amount is set to be different between the first area and second area, with the first area receiving more light compensation to offset the inherent darkness at borders.
Solution Approach 2:
The system changes the light irradiation amount parameter across different spatial regions. By controlling the backlight module to emit different light intensities in different areas (higher intensity near borders, lower intensity in central regions), the brightness uniformity is improved without requiring complex structural modifications.
2Illumination intensity
If light irradiation is increased to border areas, then brightness uniformity is improved, but energy consumption increases
Solution Approach 1:
Instead of uniformly increasing light irradiation across the entire display panel, the system applies localized light compensation only to the first area (border regions) that suffers from darkness. The light irradiation amount is differentiated by region, with enhanced irradiation specifically where needed, thereby reducing overall energy consumption compared to uniform illumination.
Solution Approach 2:
The system applies partial light compensation action only to the border areas that require it, rather than providing excessive light to the entire display panel. This targeted approach ensures brightness uniformity where needed while avoiding unnecessary energy consumption in central regions that already receive adequate light.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures uniform brightness across the display by increasing light irradiation to border areas, preventing darkening of video segments near panel borders and enhancing the overall viewing experience of continuous large videos.
Implementation Method 1
The light source module is configured to control an amount of light irradiated against the video display area such that a first area located on a side of a border with the other display panel is brighter than a second area other than the first area in the video display area
Implementation Method 2
using a combination of linear and circular lenses to maintain consistent brightness
Data Source
AI summary
According to one embodiment, a video display device includes a display panel and a light source modules, for example. The display panel includes a video display area capable of displaying video and is arranged adjacent to another display panel. The light source module includes a light source that irradiates the video display area with light. The light source module is configured to control an amount of light irradiated against the video display area such that a first area located on a side of a border with the other display panel is brighter than a second area other than the first area in the video display area.