Display Device Step Voltage Control for Brightness Precision
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Solution Overview
Problem
Current display devices can only adjust brightness by a minimum span voltage of 0.1 V, limiting the precision of brightness adjustment.
Innovation Solution
A display device and method that include a display panel with a timing control circuit and a power circuit, which generate and select step voltages based on selection and clock signals to finely regulate the power supply voltage for pixel assemblies, allowing for continuous and accurate brightness adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a minimum span voltage of 0.1 V is used for power supply modules, then the device complexity is reduced, but the brightness adjustment precision deteriorates
Solution Approach 1:
The power supply voltage is segmented into multiple discrete step voltages (e.g., 0.05 V, 0.1 V, 0.15 V, etc.) instead of using a single minimum span voltage. The voltage selection assembly selects from these segmented voltage levels to achieve finer brightness control, resolving the contradiction between precision and complexity by segmenting the voltage range into controllable steps.
Solution Approach 2:
The system dynamically adjusts the power supply voltage by selecting different step voltages based on real-time brightness requirements. The voltage conversion assembly dynamically converts selected step voltages into the appropriate power supply voltage for pixel assemblies, enabling adaptive brightness control that balances precision with circuit design constraints.
2Adaptability or versatility
If the brightness adjustment span is limited to 0.1 V, then the device complexity is reduced, but the adaptability to ambient conditions deteriorates
Solution Approach 1:
The voltage control range is segmented into multiple discrete step voltages that can be selectively applied. This segmentation enables the system to adapt to various ambient lighting conditions by choosing appropriate voltage levels from the segmented set, improving adaptability without requiring a continuous voltage adjustment mechanism.
Solution Approach 2:
The system changes the voltage parameter by selecting different step voltages from the generated voltage levels. This parameter change approach allows the display device to adapt its brightness to match ambient conditions while maintaining a manageable control structure based on discrete voltage steps rather than continuous adjustment.
3Measurement precision
If resistors are used for brightness adjustment, then the manufacturing simplicity is maintained, but the brightness control precision deteriorates
Solution Approach 1:
The patent replaces the traditional resistor-based voltage division method with an active voltage generation and selection system. Instead of using passive resistors to adjust brightness, the system generates multiple step voltages and selects from them, substituting the mechanical/resistive approach with an electronic control approach that achieves higher precision.
Solution Approach 2:
The system changes the voltage parameter dynamically by selecting different step voltages from the generated levels. This parameter change mechanism provides precise brightness control without relying on fixed resistor configurations, allowing for more accurate brightness adjustment while maintaining design simplicity through automated voltage selection.
Data Source
AI summary
The display device includes: a display panel, having a plurality of pixel assemblies each including a power supply end; a timing control circuit, having a first signal output end configured to output a selection instruction signal, and a second signal output end configured to output a clock signal; and a power circuit, including a voltage generation assembly configured to generate a plurality of step voltages, a voltage selection assembly configured to select at least one step voltage from the plurality of step voltages in response to the selection instruction signal, and a voltage conversion assembly configured to determine a power supply voltage on the basis of the step voltage in response to the clock signal and to output the power supply voltage to the power supply end.