Display Device Memory Segmentation for Aging Compensation Bandwidth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face bandwidth burdens due to frequent memory access for pixel aging compensation, which is inefficient and costly in terms of hardware and memory access.
Innovation Solution
The display device divides brightness attenuation values into first and second portion attenuation values, storing them in separate memory sections and using a controller with an update and compensation circuit to perform aging compensation, reducing memory access bandwidth by only reading the first section for compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display device stores complete brightness attenuation values in memory for pixel aging compensation, then the compensation accuracy is improved, but the memory bandwidth requirement increases
Solution Approach 1:
The patent divides the brightness attenuation values into two parts: first portion attenuation values stored in a first memory section and second portion attenuation values stored in a second memory section. The controller selectively reads only the first portion attenuation values from the first memory section during compensation, segmenting the data access to reduce bandwidth requirements while maintaining compensation functionality.
2Reliability
If the display device frequently reads and writes memory during pixel aging compensation, then the compensation process is improved, but the hardware cost and memory access burden increase
Solution Approach 1:
The patent extracts only the necessary first portion attenuation values from the complete brightness attenuation data and stores them in the first memory section. The controller is designed to read only these extracted first portion attenuation values during compensation operations, eliminating the need to access the entire memory content and reducing memory access frequency and hardware complexity.
Data Source
AI summary
A display device is provided. The display device includes a panel, a memory, and a controller. The panel includes multiple pixels. The memory includes a first section and a second section. The memory stores an aging record table. Multiple brightness attenuation values recorded in the aging table are respectively divided into multiple first portion attenuation values and multiple second portion attenuation values. The first section stores the first portion attenuation values. The second section stores the second portion attenuation values. The controller includes an update circuit and a compensation circuit. The controller is coupled to the panel and the memory. The update circuit receives gray values displayed by the pixels to update the aging table. The compensation circuit reads the first portion attenuation values from the first section so as to perform an aging compensation on the pixels.