Panel Driver Voltage Modes for Ultra-High Luminance Displays
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Solution Overview
Problem
Self-luminous display devices face limitations in achieving ultra-high luminance modes while maintaining low power consumption, as reducing the maximum grayscale voltage for increased luminance is constrained by existing voltage configurations.
Innovation Solution
A display device with a panel driver that adjusts reference and data voltages to achieve varying luminance levels through multiple modes, using a power management circuit to generate analog power supply voltages that change according to luminance requirements, maintaining constant differences between these voltages to enable ultra-high luminance operation with reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the maximum grayscale voltage is reduced to increase luminance, then the luminance is improved, but the power consumption increases
Solution Approach 1:
The patent implements multiple operating modes (first mode, second mode, third mode, fourth mode) where voltage levels are dynamically adjusted based on luminance requirements. The power management circuit changes analog power supply voltage levels and reference voltage levels according to the desired luminance mode, allowing the system to adapt between power-efficient operation and ultra-high luminance operation.
Solution Approach 2:
The patent changes multiple voltage parameters simultaneously - analog power supply voltage, reference voltage, and minimum grayscale voltage - to achieve ultra-high luminance while controlling power consumption. By maintaining constant voltage differences between these parameters across different modes, the system achieves luminance enhancement without proportional power consumption increase.
2Illumination intensity
If the analog power supply voltage level is increased to achieve higher luminance, then the luminance is improved, but the power consumption increases
Solution Approach 1:
The patent changes the analog power supply voltage level according to the luminance mode while maintaining constant differences between voltage parameters. This allows the system to achieve ultra-high luminance in fourth mode with higher analog power supply voltage while controlling power consumption through optimized voltage differential management.
3Illumination intensity
If the reference voltage level is increased to achieve higher luminance, then the luminance is improved, but the voltage configuration complexity increases
Solution Approach 1:
The patent implements a systematic approach to voltage parameter management where reference voltage, minimum grayscale voltage, and analog power supply voltage are adjusted in coordinated fashion across four operating modes. The power management circuit maintains constant differences between these voltages, providing a structured method to achieve ultra-high luminance while managing configuration complexity.
Data Source
AI summary
A display device includes a display panel including a pixel, and a panel driver providing a reference voltage and a data voltage to the pixel. The pixel emits a light corresponding to a difference between the reference voltage and the data voltage. The panel driver includes a power management circuit generating an analog power supply voltage, and providing the analog power supply voltage to a data driver. A driving mode of the display device includes a first mode emitting the light at a first luminance for a first gray level, and a second mode emitting the light at a second luminance higher than the first luminance for the first gray level. The analog power supply voltage has a first analog power supply voltage level in the first mode, and a second analog power supply voltage level higher than the first analog power supply voltage level in the second mode.