Dummy Sub-Pixel Luminance Compensation for Notch Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Special-shaped display screens with notches suffer from luminance attenuation issues, leading to abnormal display colors and reduced display effectiveness due to varying luminance attenuation degrees of sub-pixels along the notch direction.
Innovation Solution
An array substrate design that includes a base substrate with first, second, and dummy sub-pixels, where the luminance attenuation degree of the first sub-pixel is greater than the second sub-pixel, and the dummy sub-pixel emits light of the same color as the first sub-pixel, with a connecting electrode electrically connecting the pixel circuit to the light-emitting layer, allowing the pixel circuit to drive the light-emitting layer to compensate for luminance attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a notch is introduced into the display region to create special-shaped screens, then the adaptability and versatility of the display are improved, but luminance attenuation occurs in sub-pixels near the notch, causing abnormal display colors and reduced display effectiveness
Solution Approach 1:
The patent introduces dummy sub-pixels with the same light-emitting characteristics as real sub-pixels and positions them strategically near the notch. These dummy sub-pixels have different driving signals applied to them, creating local variations in luminance output to compensate for the luminance attenuation caused by the notch geometry, thereby maintaining overall display uniformity.
Solution Approach 2:
The patent modifies the driving parameters of the dummy sub-pixels, specifically applying adjusted driving signals that differ from standard sub-pixel signals. By changing the electrical parameters (voltage, current, pulse width) of the dummy sub-pixels, the system compensates for luminance losses in specific regions without altering the physical structure of the display.
2Illumination intensity
If dummy sub-pixels are added to compensate for luminance attenuation, then display uniformity is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the dummy sub-pixels with the existing pixel structure, using the same light-emitting layer and electrode configurations as real sub-pixels. This integration allows the dummy sub-pixels to be manufactured using the same process steps, reducing additional manufacturing complexity while still providing luminance compensation functionality.
Solution Approach 2:
The dummy sub-pixels are designed with the same structural components as real sub-pixels (light-emitting layer, electrodes, pixel circuit), allowing them to serve dual purposes: they can function as regular display elements when needed and simultaneously provide luminance compensation in regions affected by the notch. This multi-functionality reduces the need for separate compensation mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces the difference in luminance attenuation between sub-pixels, preventing red display phenomena and enhancing the overall display effect by compensating for luminance losses, resulting in improved color uniformity and display quality.
Implementation Method 1
the pixel circuit is configured to drive the light-emitting layer to emit light through the connecting electrode
Data Source
AI summary
A array substrate includes: a first sub-pixel, a second sub-pixel and a dummy sub-pixel that are located in a display region; a luminance attenuation degree of the first sub-pixel is greater than that of the second sub-pixel along a target direction; and a light-emitting layer of the dummy sub-pixel is configured to emit light having a color the same as that of light emitted by the first sub-pixel. As the dummy sub-pixel further includes the connecting electrode electrically connecting the pixel circuit with the light-emitting layer of the dummy sub-pixel the luminance attenuation of the first sub-pixel may be effectively compensated by driving the dummy sub-pixel to emit light.