Display Panel Sensor Region Pixel Density and Brightness Control
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Solution Overview
Problem
Existing display panels face challenges in maintaining consistent display effects between regions with integrated optical and electronic elements, leading to poor light transmittance and reduced service life due to differences in pixel density and driving current.
Innovation Solution
A display panel design with a first display region reused as a sensor setting area, featuring lower pixel density than a second display region, where sub-pixels in the first region emit light at higher brightness for shorter periods to improve transmittance and extend service life, while maintaining comparable brightness to the second region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the first display region is reused as a sensor setting region with lower pixel density, then the light transmittance is improved and sensor can receive more light signals, but the display consistency between first and second regions deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the pixel density and light-emitting characteristics between the first display region (sensor region) and second display region (normal display region). The first region uses lower pixel density with higher light-emitting brightness to improve light transmittance for sensor operation, while the second region maintains normal pixel density. This localized differentiation resolves the contradiction between improving light transmittance and maintaining overall display consistency.
Solution Approach 2:
The patent changes the light-emitting brightness parameter of sub-pixels in the first display region to be higher than that in the second region. By adjusting this parameter, the patent compensates for the reduced pixel density in the sensor region, ensuring that the display consistency is maintained while allowing improved light transmittance for sensor operation.
2Reliability
If sub-pixels in the first display region emit light at higher brightness, then the display consistency is improved, but the service life of sub-pixels deteriorates
Solution Approach 1:
The patent implements periodic action by controlling sub-pixels in the first display region to emit light only during specific time periods (when sensors need light signals) rather than continuously. The light-emitting period of first sub-pixels is set to be shorter than that of second sub-pixels, creating a periodic emission pattern that reduces cumulative stress on the sub-pixels while maintaining display consistency during active periods.
Solution Approach 2:
The patent applies dynamics by making the light-emitting characteristics of sub-pixels adjustable and time-dependent. The light-emitting brightness and duration of first sub-pixels are dynamically controlled based on sensor operation requirements, allowing the system to adapt between improving display consistency and extending sub-pixel service life depending on operational conditions.
3Duration of action of stationary object
If the light-emitting period of first sub-pixels is shortened, then the service life of sub-pixels is extended, but the light transmittance for sensors deteriorates
Solution Approach 1:
The patent ensures continuity of useful action by coordinating the light-emitting periods of first sub-pixels with the operational requirements of sensors. Although the light-emitting period is shorter than that of second sub-pixels, it is continuously adjusted to coincide with periods when sensors need light signals, ensuring that sensor operation is not interrupted while still reducing overall stress on sub-pixels to extend service life.
Data Source
AI summary
A display panel includes a first display region and a second display region; the first display region includes first sub-pixels provided with first pixel density; and the second display region includes second sub-pixels provided with second pixel density, where the first pixel density is lower than the second pixel density. During one frame of picture display, a light-emitting phase of the first sub-pixel includes a first light-emitting period, and a light-emitting phase of the second sub-pixel includes a second light-emitting period; for same target brightness, the first sub-pixel emits light with first light-emitting brightness in the first light-emitting period, and the second sub-pixel emits light with second light-emitting brightness in the second light-emitting period, where the first light-emitting brightness is higher than the second light-emitting brightness; and the first light-emitting period is shorter than the second light-emitting period.