Display Power Voltage Switching for Low-Power Image Quality Control
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Solution Overview
Problem
Existing display apparatuses face challenges in reducing power consumption without compromising display quality, as lowering data voltage can lead to display defects.
Innovation Solution
A display apparatus with a power saving mode determiner that selectively adjusts power voltage levels based on risky display quality conditions, using a power voltage generator to generate different power voltage levels in normal and power saving modes, and a power voltage control signal generator to manage these levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the data voltage applied to the display panel is reduced to reduce power consumption, then power consumption is reduced, but display defects occur
Solution Approach 1:
The patent implements dynamic switching between normal mode and power saving mode based on display quality assessment. The system dynamically adjusts power voltage levels - using higher voltage in normal mode for optimal display quality and lower voltage in power saving mode for reduced consumption - rather than using a fixed voltage level, thus resolving the contradiction between power consumption and display quality reliability
Solution Approach 2:
The patent changes the power voltage parameter based on operating conditions. By monitoring display quality indicators and switching between different power voltage levels (first level in normal mode, second level in power saving mode), the system optimizes the balance between power consumption and display quality, preventing display defects while reducing energy usage
2Use of energy by moving object
If the data voltage applied to the display panel is reduced to reduce power consumption, then power consumption is reduced, but display defects occur according to display panel type and driving method
Solution Approach 1:
The patent applies different power voltage levels tailored to specific display panel types and driving methods. By assessing the particular characteristics of the display panel (such as whether it is a power savable panel) and applying appropriate voltage levels locally adapted to that panel type, the system reduces power consumption without causing display defects specific to certain panel configurations
Data Source
AI summary
A display apparatus includes a display panel, a data driver, a power saving mode determiner, a power voltage control signal generator and a power voltage generator. The data driver is configured to output a data voltage to the display panel. The power saving mode determiner is configured to determine a driving mode selected from a power saving mode and a normal mode based on a risky display quality condition. The power voltage control signal generator is configured to generate a power voltage control signal determining a level of a power voltage based on the driving mode. The power voltage generator is configured to generate the power voltage based on the power voltage control signal and to output the power voltage to at least one of the display panel and the data driver.