Dynamic Backlight Partitioning for Display Brightness Control
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Solution Overview
Problem
Existing backlight technologies face challenges in efficiently managing power consumption while maintaining display quality, especially when displaying images with large brightness differences, as fixed partition control methods fail to meet display requirements and increase energy usage.
Innovation Solution
A driving method for backlights that calculates the brightness difference of an image and dynamically partitions the backlight into sub-regions based on these differences, adjusting the number of light-emitting regions to match the image's brightness variations, thereby optimizing energy use and display effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If local dimming control is applied to each partition of the backlight, then display quality is improved, but power consumption increases
Solution Approach 1:
The backlight is divided into multiple partitions that can be independently controlled. Each partition corresponds to a specific region of the display, allowing selective illumination of different areas based on the image content, thus improving display quality while managing power consumption through region-specific control.
Solution Approach 2:
The partition configuration is made dynamic rather than fixed. The system automatically adjusts the number and boundaries of partitions based on the brightness difference characteristics of the displayed image, enabling adaptive power management that balances display quality and energy consumption according to actual viewing needs.
2Illumination intensity
If the backlight is divided into multiple fixed partitions, then local dimming control is achieved, but power consumption increases for images with small brightness differences
Solution Approach 1:
The system dynamically determines the number of partitions based on the brightness difference value of the displayed image. When the brightness difference is small, fewer partitions are used to reduce power consumption; when the brightness difference is large, more partitions are activated to maintain display quality. This dynamic adjustment resolves the contradiction between local dimming control and energy efficiency.
Solution Approach 2:
The partition configuration parameters (number of partitions, boundary positions) are changed based on the image characteristics. The system calculates the brightness difference value and uses it to adjust partition parameters, transforming the fixed partition structure into an adaptive one that optimizes the balance between display quality and power consumption for different image types.
3Use of energy by moving object
If fixed partition control is used, then power consumption is managed, but display requirements are not met for images with large brightness differences
Solution Approach 1:
The partition configuration is dynamically adjusted based on the brightness difference characteristics of the displayed image. For images with large brightness differences, the system increases the number of partitions to provide finer local dimming control, ensuring display quality requirements are met while still managing power consumption through selective activation of only the necessary partitions.
Data Source
AI summary
A driving method for a backlight is provided. The backlight includes a plurality of light-emitting elements, and the driving method includes steps of calculating a brightness difference value of an image to be displayed; and determining whether the brightness difference value of the image to be displayed is greater than a predetermined difference value of the image. When the brightness difference value of the image to be displayed is determined to be greater than the predetermined difference value of the image, the method includes steps of dividing the image to be displayed into a plurality of sub-regions; partitioning the backlight according to brightness difference values of the plurality of sub-regions to obtain a plurality of final light-emitting regions of the backlight; and driving the backlight to emit light according to the plurality of final light-emitting regions. The present disclosure further provides a driving circuit, a backlight and a display device.