Display Panel Driver Multi-Frequency Sampling
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Solution Overview
Problem
Conventional display devices with multi-frequency driving technology require separate hardware to measure deterioration in different display regions, leading to increased hardware size.
Innovation Solution
A display panel driver that samples both first and second display regions without distinction by using a compensator to generate data signals, a sampler to sample data signals at a frequency less than or equal to the second driving frequency, and an accumulator to generate deterioration data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate hardware is used to measure deterioration in different display regions, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the sampling functions for both display regions into a single sampler that operates at the second (lower) frequency. This single sampler sequentially samples both the first display region at the first frequency and the second display region at the second frequency, eliminating the need for separate sampling hardware for each region while maintaining measurement precision through the unified sampling and accumulation process.
Solution Approach 2:
The sampler is designed as a universal component that can handle both display regions with different scanning frequencies. It performs multiple functions by sampling pixels from both regions using the same hardware resources, and the accumulation unit processes data from both regions together, making the hardware multi-functional and reducing overall system complexity.
2Measurement precision
If separate sampling configurations are used for first and second display regions, then measurement precision is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent combines the sampling configurations into a single unified system. The sampler uses one set of hardware resources to sample both display regions, and the accumulation unit uses one accumulation buffer to store data from both regions. This merged configuration simplifies the manufacturing process by reducing the number of components that need to be assembled and configured separately.
3Measurement precision
If full data signals are accumulated for all pixels, then measurement precision is improved, but use of energy increases
Solution Approach 1:
The patent applies partial action by accumulating data signals only for sampling pixels rather than all pixels in the display regions. The sampler selectively samples specific pixels at the second frequency, and the accumulation unit accumulates only these sampled data signals. This partial accumulation approach maintains sufficient measurement precision for deterioration detection while significantly reducing the computational burden and energy consumption compared to accumulating data from every pixel.
Data Source
AI summary
A display panel driver which drives a display panel includes a compensator configured to generate a data signal by compensating for input image data based on deterioration data, a sampler configured to generate, when a first display region of the display panel is scanned at a first driving frequency and when a second display region of the display panel is scanned at a second driving frequency that is less than the first driving frequency, a data signal corresponding to a sampling pixel by sampling the data signal at a sampling frequency that is less than or equal to the second driving frequency, and an accumulator configured to generate the deterioration data by accumulating the data signal corresponding to the sampling pixel.