Dual-Cell Display Apparatus Dark Frame Brightness Control
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Solution Overview
Problem
Dual-cell display apparatuses face challenges in achieving optimal brightness control and contrast due to issues with dark frame brightness and power consumption, particularly in maintaining pure black frames and enhancing image contrast.
Innovation Solution
The dual-cell display apparatus incorporates a processor to generate dimming data for the first panel and image data for the second panel, along with backlight control data, using multiple backlight partitions to dynamically adjust brightness based on image content, and employs a combination of dual panels and dynamic backlight control to improve contrast and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dual-cell display technology is used to reduce dark frame brightness, then static contrast is significantly increased, but brightness control becomes more difficult and power consumption increases
Solution Approach 1:
The backlight is divided into multiple independent backlight partitions (e.g., left, center, right zones) that can be controlled separately. This segmentation allows different regions to have different brightness levels, enabling precise control of dark frame brightness while maintaining overall display brightness, thereby reducing the complexity of unified brightness control in dual-cell displays
Solution Approach 2:
The patent implements dynamic brightness adjustment where the processor continuously generates dimming data and backlight control data based on real-time image signals. The system dynamically switches between different brightness control modes (first brightness control mode for normal display, second brightness control mode for dark frames) to optimize performance under varying display conditions
2Reliability
If dual panels are stacked to enhance image contrast, then dark frame brightness is reduced, but power consumption increases
Solution Approach 1:
The system uses periodic dimming control where the backlight is selectively dimmed only during dark frame periods rather than continuously. The processor analyzes image signals to identify dark frame periods and applies dimming data only when needed, reducing overall power consumption while maintaining high image contrast during critical display moments
Solution Approach 2:
The patent changes operational parameters dynamically by adjusting backlight brightness levels based on image content analysis. The processor modifies brightness parameters (dimming data, backlight control data) according to the detected image signal characteristics, enabling the system to maintain high contrast when needed while reducing power consumption during low-contrast or bright display periods
Data Source
AI summary
The present disclosure describes a dual-cell display apparatus. The apparatus includes a first panel, and a second panel disposed in a first preset order relative to the first panel. The apparatus includes a memory storing instructions; and a processor in communication with the memory. When executing the instructions, the processor is configured to receive an image signal, and generate dimming data for the first panel according to the image signal. When executing the instructions, the processor is also configured to generate image data for the second panel according to the image signal, and generate backlight data for backlight control according to the image signal.