Display Device Brightness Flicker Reduction via Gamma Voltage
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Solution Overview
Problem
Display devices experience serious flicker when switching between different refresh frequencies due to brightness differences, leading to reduced overall brightness and electrical leakage.
Innovation Solution
A display device with a driving module, a first power control module, and a second power control module, where the first power control module calls white balance look-up tables and the second power control module provides gamma voltages corresponding to refresh frequencies to adjust brightness, ensuring consistent image brightness across different refresh rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device switches between different refresh frequencies, then the display can adapt to different display requirements, but the brightness difference causes serious flicker
Solution Approach 1:
The patent applies parameter changes by adjusting the gamma voltage parameter according to different refresh frequencies. The gamma voltage is dynamically changed to compensate for brightness differences caused by varying refresh rates, ensuring consistent perceived brightness across different frequency settings.
Solution Approach 2:
The patent implements feedback control by using look-up tables that store pre-calibrated gamma voltage values for different refresh frequencies. The system automatically selects the appropriate gamma voltage based on the current refresh frequency, creating a closed-loop control mechanism that maintains brightness consistency.
2Use of energy by moving object
If the display device refreshes images at lower refresh frequency, then energy consumption is reduced, but the time period between frames increases causing electrical leakage and reduced overall brightness
Solution Approach 1:
The patent changes the gamma voltage parameter in response to lower refresh frequencies to compensate for increased electrical leakage. By adjusting this electrical parameter, the system maintains adequate brightness levels even when operating at energy-saving refresh rates with longer frame intervals.
3Illumination intensity
If the display device refreshes images at higher refresh frequency, then flicker is reduced, but energy consumption increases
Solution Approach 1:
The patent dynamically adjusts the gamma voltage parameter based on the selected refresh frequency, enabling the display to operate at lower energy-consuming frequencies while maintaining brightness stability through compensatory voltage adjustments.
Data Source
AI summary
The present application discloses a display device. In the display device provided by the present application, by making the refresh frequencies correspond to the white balance look-up tables and the gamma voltages, when the refresh frequencies of the display panel change, the brightness of the images of the display panel can be adjusted by adjusting the white balance look-up table and the gamma voltage provided to the display panel.