Backlight Luminance Control Using Video Signal Peaks
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Solution Overview
Problem
Liquid crystal display devices face challenges in reducing power consumption while maintaining image quality, as existing methods do not effectively adjust backlight luminance based on video signal peaks and positions across the display screen.
Innovation Solution
A display device and method that corrects video signals and sets backlight luminance using peak levels and factor data from a data map, adjusting luminance for partial display areas and positions to reduce power consumption without degrading image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the backlight luminance is reduced to save power, then power consumption is reduced, but image quality deteriorates
Solution Approach 1:
The patent applies local quality by dividing the display screen into multiple partial display areas and independently controlling the backlight luminance in each area based on the peak level and peak position of video signals in that specific area. This allows the backlight to be dimmed in areas where it is not needed while maintaining full brightness in areas displaying important content, thus reducing overall power consumption without compromising image quality in critical regions.
Solution Approach 2:
The patent implements dynamics by dynamically adjusting the backlight luminance in real-time based on the analyzed video signal characteristics (peak level and peak position). The system continuously monitors the video content and adapts the backlight output accordingly, transitioning from static full-screen backlight control to dynamic localized control that responds to changing display requirements.
2Use of energy by moving object
If the backlight is divided into multiple partial light-emitting sections for localized control, then power consumption is reduced through selective dimming, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the backlight into multiple partial light-emitting sections that correspond to partial display areas on the screen. Each section can be independently controlled based on the video signal characteristics of its corresponding area. This segmentation enables selective dimming of specific backlight regions while maintaining others at full brightness, achieving power savings without requiring complete backlight replacement.
Data Source
AI summary
Disclosed herein is a display device including: a liquid crystal display section adapted to display an image based on a video signal; a backlight; and a processing section adapted to correct the video signal and set the luminance of the backlight based on two pieces of information, a peak level of the video signal in a display screen or in each of a plurality of partial display areas into which the display screen is divided, and factor data obtained from a data map made up of a reference position on the display screen and the factor data that are associated with each other.