Backlight Block Control for LCD Power Reduction
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Solution Overview
Problem
Current liquid crystal display technologies consume excessive energy due to always-on backlights, leading to unnecessary waste and discomfort from overly bright screens, especially with increasing screen sizes and resolutions.
Innovation Solution
An image display method that synchronizes backlight brightness data with pixel data using a backlight algorithm, turning on or off backlight block units based on pixel brightness thresholds, allowing for fine control of backlighting to match image content, thereby reducing overall brightness and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a whole backlight is used in liquid crystal display, then the screen can be illuminated uniformly, but power consumption increases and energy is wasted unnecessarily
Solution Approach 1:
The backlight is divided into multiple independent backlight blocks that can be controlled separately. Each backlight block corresponds to multiple pixel units, and the control circuit can independently adjust the brightness or turn off specific backlight blocks based on the luminance requirements of different screen regions, avoiding unnecessary illumination and reducing power consumption.
Solution Approach 2:
Different regions of the screen receive different backlight intensities according to their actual needs. The control circuit determines the luminance requirements of each region and adjusts the corresponding backlight blocks accordingly, providing locally optimized illumination rather than uniform whole-screen backlighting.
2Illumination intensity
If the backlight is always on to ensure screen illumination, then viewing is possible at all times, but the screen becomes overly bright causing discomfort to the human body
Solution Approach 1:
The backlight brightness is dynamically adjusted based on the actual image content being displayed. The control circuit analyzes the pixel data and adjusts each backlight block's intensity in real-time according to the luminance requirements of the corresponding screen region, preventing overall over-brightness and reducing visual discomfort.
Solution Approach 2:
The backlight blocks are controlled to be turned on or off periodically based on the image content requirements. Instead of continuous illumination, the backlight is activated only when and where needed, creating a dynamic illumination pattern that matches the displayed content and reduces excessive brightness exposure.
Data Source
AI summary
An image display method is provided. The method includes: in response to receiving an Nth frame synchronization signal, acquiring an (N+1)th frame image to be displayed and pixel data of pixels in the (N+1)th frame image to be displayed (S12); calculating backlight brightness data of a display screen according to the pixel data by a backlight algorithm (S14); in response to receiving an (N+1)th frame synchronization signal, synchronously sending the (N+1)th frame image to be displayed and the backlight brightness data to the display screen and a backlight driving board respectively (S16). In addition, the present application further discloses an image processing apparatus, an electronic device and a storage medium.