OLED Panel Voltage Control for Luminance Uniformity
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Solution Overview
Problem
Existing display apparatuses, particularly OLED display apparatuses, face challenges in achieving suitable control for low power consumption and consistent luminance across the screen, due to the inability to accurately account for color information and load variations on the panel.
Innovation Solution
A signal processing apparatus and method that acquire information regarding the color of the video, screen brightness, and physical quantities related to the panel, and perform adaptive control of the driving voltage based on this information to manage the load and application on the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the driving voltage is increased to maintain consistent luminance across the screen, then luminance uniformity is improved, but power consumption increases
Solution Approach 1:
The patent applies local quality by dividing the display screen into multiple regions (e.g., center region and peripheral regions) and applying different driving voltages to different regions. The center region receives a first driving voltage while peripheral regions receive a second driving voltage that is lower than the first, thereby maintaining luminance uniformity across the screen while reducing overall power consumption by avoiding uniform high voltage application.
2Illumination intensity
If the driving voltage is increased to improve display performance, then luminance is improved, but temperature rise increases
Solution Approach 1:
The patent implements local quality by applying different driving voltages to different regions of the display. The center region is driven at a higher voltage to achieve adequate luminance, while peripheral regions are driven at a lower voltage, thereby reducing overall power consumption and minimizing temperature rise while maintaining acceptable display performance.
3Ease of manufacture
If uniform driving voltage is applied across the entire panel, then manufacturing simplicity is maintained, but luminance uniformity deteriorates
Solution Approach 1:
The patent resolves this contradiction by implementing local quality through region-specific voltage control. The display panel is divided into multiple regions with different driving voltage characteristics. This approach maintains manufacturing simplicity by using a relatively straightforward voltage division scheme while effectively compensating for luminance non-uniformity that would otherwise occur with uniform voltage application.
4Illumination intensity
If high driving voltage is applied to the entire screen, then luminance is improved, but power consumption increases
Solution Approach 1:
The patent applies local quality by determining different driving voltages for different regions of the display based on their specific luminance requirements. The center region, which typically requires higher voltage for adequate luminance, receives a first driving voltage, while peripheral regions receive a lower second driving voltage. This selective voltage application maintains overall luminance performance while significantly reducing total power consumption compared to uniform high-voltage driving.
Data Source
AI summary
The present technology relates to a signal processing apparatus, a signal processing method, and a display apparatus that are able to provide suitable functionality according to applications. The signal processing apparatus provided by the present technology includes a signal processing section that acquires at least one of first information regarding a color of a video to be displayed on a panel section, second information regarding brightness of a screen of the panel section, and third information measured as a physical quantity related to the panel section, and that performs, on the basis of the acquired information, adaptive control of a voltage according to a load on and an application of the panel section. The voltage is used for driving the panel section. The present technology is applicable, for example, to a self-luminous display apparatus.


