Display Panel Emission-Cycle Control for Flicker and Color Shifts
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Solution Overview
Problem
Display panels experience flicker and color shifts due to inconsistent light emission patterns, particularly when transitioning from single-frame to multiple-frame light emission, and this affects display quality and power consumption.
Innovation Solution
A display apparatus and method that adjusts the light emission cycle and off ratio of gate lines based on luminance and grayscale values to optimize display quality and reduce electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the light emitting element emits light once in a single frame, then power consumption is reduced, but flicker occurs and display quality deteriorates
Solution Approach 1:
The patent applies dynamics by making the light emission cycle adjustable rather than fixed. The driving controller dynamically changes the light emission cycle based on luminance ranges, transitioning between 1-cycle mode (for high luminance/low power consumption) and 2-cycle mode (for low luminance/high display quality). This dynamic adjustment resolves the contradiction by allowing the system to optimize between power consumption and display quality depending on operational conditions.
Solution Approach 2:
The patent changes the parameter of light emission cycle from a fixed value to a variable parameter that can be adjusted based on luminance conditions. By setting different light emission cycles (1-cycle or 2-cycle) corresponding to different luminance ranges, the system can adapt power consumption and display quality to match the required performance level for each specific operating condition, thereby resolving the contradiction between these two opposing requirements.
2Reliability
If the light emitting element emits light multiple times in a single frame, then display quality is improved, but color shifts occur and electromagnetic interference increases
Solution Approach 1:
The patent uses dynamics to adjust the light emission cycle based on luminance conditions. Instead of continuously operating in multi-cycle mode (which causes color shifts and EMI), the system dynamically switches to 1-cycle mode when luminance is high, and only uses 2-cycle mode when luminance is low and display quality is prioritized. This dynamic control minimizes the occurrence of color shifts and electromagnetic interference while maintaining display quality when necessary.
Solution Approach 2:
The patent changes the light emission cycle parameter based on luminance ranges to control harmful effects. By setting the light emission cycle to 1-cycle for high luminance ranges and 2-cycle for low luminance ranges, the system reduces the frequency of light emission transitions that cause color shifts and electromagnetic interference, thereby mitigating these harmful factors while maintaining acceptable display quality.
3Reliability
If the light emission cycle is increased to prevent flicker, then display quality improves, but power consumption increases
Solution Approach 1:
The patent changes the light emission cycle parameter based on luminance conditions to balance display quality and power consumption. By setting the light emission cycle to 1-cycle for high luminance ranges (where display quality is sufficient with fewer emissions) and 2-cycle for low luminance ranges (where more emissions are needed to maintain quality), the system optimizes the trade-off between power consumption and display quality for each operating condition.
Solution Approach 2:
The patent applies dynamics by making the light emission cycle adaptive rather than fixed. The driving controller dynamically selects between 1-cycle and 2-cycle modes based on real-time luminance conditions, allowing the system to increase light emission frequency only when necessary for display quality (low luminance conditions) and reduce it when not necessary (high luminance conditions), thereby optimizing power consumption while maintaining display quality.
Data Source
AI summary
A display apparatus including: a display panel including an emission line and a pixel electrically connected to the emission line; an emission driver configured to output an emission signal to the emission line; and a driving controller configured to determine a light emission cycle, wherein the light emission cycle is a number of light emissions in a single frame of the emission signal, wherein the driving controller is configured to determine a luminance according to a user luminance setting and a grayscale value of input image data, to determine the light emission cycle corresponding to a range of the luminance and to determine an off ratio according to the luminance, wherein the off ratio is a ratio of turned-off gate lines to a total number of the gate lines.