Backlight Dimming Data Transmission for Selective Light-On Regions
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Solution Overview
Problem
In liquid crystal display systems, the existing methods for dimming control, such as local dimming, lead to an increase in the data amount of dimming data that needs to be transmitted, posing a challenge in efficient data management.
Innovation Solution
A dimming data transmission device is introduced, which includes a determination unit to classify regions of a backlight unit as either light-on or light-off and a transmission unit to transmit dimming data only to the light-on regions, reducing the overall data amount by eliminating the need for data transmission to light-off regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If local dimming control is adopted to improve contrast ratio, then the contrast ratio of displayed images is improved, but the data amount of dimming data increases
Solution Approach 1:
The patent extracts only the necessary dimming data for light-on regions and transmits it, while excluding data for light-off regions. This selective extraction reduces the overall data amount while maintaining the contrast ratio improvement achieved through local dimming control.
Solution Approach 2:
The patent applies different quality treatment to different regions: light-on regions receive detailed dimming data for precise control, while light-off regions are excluded from data transmission. This local differentiation maintains image quality where needed while reducing overall data requirements.
2Reliability
If dimming data is transmitted to all divided regions, then complete dimming control is achieved, but the transmission data amount increases
Solution Approach 1:
The patent extracts and transmits only the essential dimming data corresponding to light-on regions, removing redundant data for light-off regions. This ensures complete dimming control for active areas while minimizing transmission data amount.
Solution Approach 2:
The patent applies partial action by transmitting dimming data only to the extent necessary for light-on regions, rather than providing complete data for all regions. This partial transmission is sufficient to achieve the desired dimming control effect.
Data Source
AI summary
A dimming data transmission device includes a determination unit configured to determine whether each of a plurality of divided regions, into which a lightable region of an illumination device is divided, is a light-on region or a light-off region, and a transmission unit configured to transmit dimming data to dim only such a divided region of the divided regions as is serving as the light-on region.