Image Display Control Real-Time Correction Circuit
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Solution Overview
Problem
Existing image display control devices face challenges in implementing real-time video image correction due to delays in calculating correction coefficients, especially when performing adaptive image correction and backlight luminance reduction simultaneously, which increases computational load and power consumption, making it difficult to achieve real-time processing and reduce circuit size and power consumption in portable devices.
Innovation Solution
An image display control device that acquires statistical information in a frame unit, calculates correction coefficients based on this information without waiting for the entire frame to be processed, and uses these coefficients for real-time image correction, allowing for efficient adaptive luminance adjustment and image correction without parallel hardware, thereby reducing power consumption and circuit size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If adaptive image correction is performed using statistical values of the preceding frame, then image quality is improved, but processing delay increases and real-time capability deteriorates
Solution Approach 1:
The patent performs preliminary acquisition of statistical information (histogram data) during the display period of the preceding frame, before the correction coefficient calculation is needed. This allows the statistical data to be ready in advance, reducing the critical path delay for real-time correction of the current frame.
Solution Approach 2:
The patent divides the frame processing into segments: statistical information acquisition during the display period, calculation period, and correction period. By segmenting the processing timeline and overlapping these phases across different frames, the system achieves real-time correction without waiting for complete frame processing.
2Use of energy by moving object
If adaptive backlight luminance reduction is performed simultaneously with adaptive image correction, then power consumption is reduced, but computational load increases and real-time processing becomes difficult
Solution Approach 1:
The patent merges the backlight luminance adjustment calculation and image correction calculation into a single integrated process that shares the same statistical information (histogram data) from the preceding frame. Both corrections use the same statistical values, eliminating redundant calculations and reducing the overall computational burden while achieving both power saving and image quality improvement simultaneously.
3Speed
If parallel hardware is used to perform multiple calculations at high speed, then processing speed is improved, but circuit area and power consumption increase
Solution Approach 1:
The patent maintains continuous useful action by acquiring statistical information during the display period of the preceding frame, calculating correction coefficients during the calculation period, and applying corrections during the correction period. This continuous overlapping of operations across frame boundaries eliminates idle hardware periods, achieving high processing throughput without requiring parallel hardware for every operation.
Data Source
AI summary
An image display control device is capable of performing video image correction in real time. An effective pixel evaluation area Z1 corresponding to one frame is set in a statistical information acquisition section. The statistical information acquisition section finishes a statistical value acquisition process after acquiring a statistical value of the effective pixel evaluation area Z1, and calculation of a correction coefficient and the like using the statistical value is completed within the remaining time of the one frame period. When input of an image signal of the next frame is started, the image display control device performs image correction using the calculated correction coefficient. The image display control device can calculate a backlight luminance after reduction in luminance at the same time as the correction coefficient.