OLED Display Transition Region for Sensor Light Transmission
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Solution Overview
Problem
Organic light emitting diode (OLED) displays with adjacent regions of significantly different pixel densities exhibit sharp transitions in image quality, leading to undesirable luminance and color shifts at the boundary, affecting the perception of image uniformity and sensor operation.
Innovation Solution
Incorporating a transition region between high and low pixel density regions in OLED displays, where the pixel emissive area density and circuit density are intermediate, with distinct patterns and longer conductive traces, to smooth the transition and enhance electromagnetic radiation transmission for sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a low pixel density region is created above the sensor to improve light transmission, then sensor operation is improved, but a sharp transition in image quality appears at the boundary between high and low density regions
Solution Approach 1:
The display is divided into three distinct regions: a high pixel density region, a low pixel density region, and an intermediate transition region. This segmentation allows the system to simultaneously achieve good sensor transmission (through the low density region) and smooth visual appearance (through the gradual transition region), eliminating the harmful sharp boundary effect.
Solution Approach 2:
Different regions of the display are assigned different pixel densities according to their local functional requirements. The low pixel density region above the sensor optimizes light transmission for sensor operation, while the high pixel density region maintains display quality for visible areas, and the intermediate region provides a smooth transition between these local quality requirements.
2Use of energy by moving object
If pixel density is reduced in a region to facilitate light transmission to the sensor, then electromagnetic radiation transmission is improved, but image resolution and quality are degraded in that region
Solution Approach 1:
The display structure implements local quality optimization by reducing pixel density only in the specific region where light transmission to the sensor is required, while maintaining high pixel density in regions where display quality is the primary concern. This localized approach allows the system to optimize both transmission and resolution in their respective areas.
Solution Approach 2:
The display is segmented into functional zones with different pixel densities. The low pixel density region is specifically positioned above the sensor to maximize electromagnetic radiation transmission, while the high pixel density regions maintain image resolution quality. The intermediate transition region bridges these zones to prevent visible artifacts.
3Object-affected harmful factors
If a transition region with intermediate pixel density is added between high and low density regions, then the sharp transition in image quality is reduced, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The transition region is implemented as a distinct segmented zone with intermediate pixel density, providing a gradual visual transition between high and low density regions. This segmentation approach, while adding structural complexity, systematically resolves the visible boundary problem through a controlled intermediate zone rather than attempting complex blending techniques.
Solution Approach 2:
The pixel density parameter is gradually changed across the transition region, creating a smooth gradient between the high and low density regions. This parameter variation approach eliminates abrupt transitions and visible boundaries, though it requires coordinated control of multiple display parameters across the transition zone.
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
This approach reduces the visibility of sharp transitions, ensures uniform emissive properties across the display, and facilitates effective operation of sensors by allowing better light transmission through the low pixel density region.
Implementation Method 1
organic light emitting diode (OLED) displays are emissive flat panel displays featuring an array of pixels, each of which includes at least one OLED. During operation, a pixel circuit delivers electric current to the OLED, causing it to emit light.
Data Source
AI summary
An apparatus is described that includes a light emitting diode (LED) display and a sensor. The LED display includes pixel emissive areas that are each coupled by a corresponding conductive trace to a corresponding pixel circuit that drives the respective pixel emissive area. The LED display has a high density region, a low density region, and a transition region between the high density region and the low density region. A pattern of the pixel circuits in the transition region matches a pattern of pixel circuits in the low density region, with at least some conductive traces that couple pixel emissive areas to pixel circuits in the transition region being longer than corresponding conductive traces that couple pixel emissive areas to pixel circuits in the low density region. The sensor is arranged to receive electromagnetic radiation transmitted through the low density region of the LED display.