See-Through Display Pixel Segmentation for Under-Panel Cameras
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Solution Overview
Problem
Display panels with multiple layers cause attenuation and modulation of light, leading to dark or blurred images when captured by camera modules or sensors arranged below, affecting image quality and sensor reliability.
Innovation Solution
An image display device with pixels arranged in two regions: a first region with a non-light emitting area of high transmittance and a self-light emitting element, and a second region with a lower transmittance light emitting area and a self-light emitting element, where the luminance is adjusted to match at boundaries, allowing light to pass through the non-emitting region to sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is made transparent to arrange the camera module below, then the camera can capture subject light through the display panel, but the captured image becomes dark or blurred due to light attenuation and modulation by multiple layers
Solution Approach 1:
The display panel is divided into two distinct regions: a first pixel region with high visible light transmittance for camera light passage, and a second pixel region with lower visible light transmittance for normal display function. This segmentation allows the camera module to be arranged below the display panel while maintaining image quality by directing camera light through the high-transmittance region.
Solution Approach 2:
Different regions of the display panel are assigned different optical properties: the first pixel region has high visible light transmittance to minimize attenuation for camera light, while the second pixel region has lower visible light transmittance for normal display purposes. This local differentiation resolves the contradiction between camera functionality and image quality.
2Adaptability or versatility
If the display panel layers are made transparent for light transmission, then the camera module can be arranged below, but flare and diffraction occur causing image quality deterioration
Solution Approach 1:
The display panel is segmented into a first pixel region optimized for light transmission with minimal optical interference, and a second pixel region for normal display. This segmentation isolates the camera light path from regions that would cause flare and diffraction, allowing sensor arrangement below while preventing optical interference.
3Reliability
If the non-light emitting region is made highly transparent, then light transmission to the sensor is improved, but the light emitting regions may cause interference with sensor operation
Solution Approach 1:
The display panel is divided into a first pixel region with high transmittance where light emission is suppressed to allow sensor operation, and a second pixel region with normal transmittance for display functions. This segmentation prevents light emission interference in the sensor region while maintaining light transmission capability.
Solution Approach 2:
The light emitting elements in the first pixel region are controlled to emit light periodically or intermittently rather than continuously, allowing periods when light is not emitted so the sensor can operate without interference, while still maintaining the ability to transmit light when needed.
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
Prevents light attenuation and modulation, maintaining image quality and sensor reliability by optimizing light transmission and emission across different pixel regions.
Implementation Method 1
a first self-light emitting element that emits light from the first light emitting region
Implementation Method 2
a non-light emitting region having a higher visible light transmittance than the first light emitting region
Implementation Method 3
the first light emitting region and the second light emitting region may include a region that reflects incident visible light without transmitting the visible light
Data Source
AI summary
Image devices with attenuation and modulation prevention for light received or projected through a display surface are disclosed. In one example, an image display device includes pixels arranged two-dimensionally, in which a pixel in a first pixel region includes a first light emitting region, a non-light emitting region having a higher visible light transmittance than the first light emitting region, and a first self-light emitting element that emits light from the first light emitting region. A pixel in a second pixel region other than the first pixel region includes a second light emitting region having a lower visible light transmittance than the non-light emitting region, and a second self-light emitting element that emits light from the second light emitting region.