Backlight Luminance Control via Pixel Region Segmentation
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Solution Overview
Problem
Current technologies lack effective luminance control mechanisms for LED backlight sources in LCD displays, which limits power saving and dynamic contrast enhancement.
Innovation Solution
A control apparatus and method that dynamically adjusts backlight luminance of LED units based on reference values generated from input image pixel regions, using a reference value generator, control value generator, and compensation circuit to optimize pixel values and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LED backlight sources are used to achieve lower power consumption, then energy efficiency is improved, but luminance control capability deteriorates
Solution Approach 1:
The backlight module is divided into multiple independently controllable backlight units, each corresponding to a specific pixel region. This segmentation allows individual luminance control of each backlight unit based on the content of its corresponding pixel region, enabling precise luminance control while maintaining low power consumption of LED sources.
Solution Approach 2:
Different backlight units are controlled with different luminance levels according to the local content requirements of their corresponding pixel regions. Bright regions receive higher backlight luminance while dark regions receive lower luminance, achieving optimal power efficiency and image quality through localized control.
2Stability of the object's composition
If uniform backlight luminance is maintained across all regions, then image consistency is improved, but power consumption increases
Solution Approach 1:
The system applies different luminance levels to different backlight units based on the local content characteristics of their corresponding pixel regions. This local quality adjustment maintains image consistency in terms of overall quality while significantly reducing power consumption by avoiding uniform high luminance across all regions.
Solution Approach 2:
The backlight luminance of each unit is dynamically adjusted based on the content of the input image in real-time. This dynamic control allows the system to adapt luminance distribution to match the actual image requirements, maintaining image consistency only where needed while saving power in dark or low-detail regions.
3Use of energy by moving object
If backlight luminance is reduced for power saving, then energy efficiency is improved, but image quality deteriorates
Solution Approach 1:
The system maintains high image quality by ensuring that each backlight unit provides appropriate luminance for its corresponding pixel region's content requirements. Bright and detailed regions receive sufficient luminance to maintain quality, while dark or low-detail regions use reduced luminance for power saving, achieving both goals simultaneously.
Solution Approach 2:
The system uses the pixel values of the input image as feedback to determine the appropriate luminance level for each backlight unit. This feedback mechanism ensures that luminance is adjusted according to actual image content needs, preventing quality degradation while maximizing power savings.
4Use of energy by moving object
If dynamic luminance adjustment is implemented, then power saving is improved, but device complexity increases
Solution Approach 1:
The control system is segmented into simple control circuits for each backlight unit, where each circuit independently processes pixel values from its corresponding pixel region and generates appropriate luminance control signals. This segmentation keeps individual control units simple while achieving complex overall luminance adjustment through coordinated operation of multiple simple units.
Data Source
AI summary
An apparatus for controlling a display having a backlight module provided with a first set of units and a display panel provided with a second set of units is provided. In one embodiment, the apparatus comprises a reference value generator, a control value generator, and a compensation circuit. The reference value generator generates a reference value representative of a portion of pixels contained in an input image associated with one of the second set of units. The control value generator generates a control value to control one of the first set of units in view of the reference value. The compensation circuit adjusts the portion of pixels contained in the input image in view of the control value. The one of the first units is associated with the one of the second units.