Display Pixel and Optical Sensor Layout Using Edge Light Scattering
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Solution Overview
Problem
Existing display devices face challenges in integrating pixels for image display and optical sensors without compromising resolution or optical detection accuracy, particularly in securing an arrangement region for both components.
Innovation Solution
A display device design that positions a light source unit for optical sensors in a non-active region, allowing for the arrangement of pixels and optical sensors without reducing image resolution or optical detection accuracy, utilizing a scattering pattern layer and encapsulation layers to optimize light emission and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light source unit is disposed in the active region to enable optical sensor integration, then optical detection function is achieved, but image resolution is reduced
Solution Approach 1:
The display device divides the substrate into active region and non-active region, placing pixels in the active region and the light source unit in the non-active region. This spatial segmentation allows both display and optical detection functions to coexist without interfering with each other, maintaining image resolution while enabling optical sensor integration.
Solution Approach 2:
The light source unit is positioned in the non-active region, utilizing the spatial dimension around the active region rather than competing for the same area. This dimensional relocation resolves the conflict between optical detection functionality and display resolution by using different spatial zones.
2Manufacturing precision
If the light source unit is disposed in the non-active region to maintain image resolution, then image resolution is maintained, but optical detection accuracy is reduced
Solution Approach 1:
A scattering pattern layer is introduced as an intermediary between the light source unit and the optical sensors. This layer scatters the light emitted by the light source unit, enhancing the optical detection accuracy by improving light distribution and interaction with the sensors, thereby compensating for the reduced proximity caused by placing the light source in the non-active region.
Solution Approach 2:
The scattering pattern layer modifies the light propagation parameters by scattering the light in specific patterns. This changes the light distribution characteristics, enhancing the optical detection capability despite the light source being positioned in the non-active region, thus maintaining measurement precision.
3Area of stationary object
If pixels and optical sensors are integrated in the active region, then arrangement region is secured, but device complexity increases
Solution Approach 1:
The device structure is segmented into distinct functional regions: the active region containing pixels and optical sensors, and the non-active region containing the light source unit. This segmentation simplifies the integration process by clearly defining functional zones and reducing the complexity of inter-component interactions.
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 secures an arrangement region for pixels and optical sensors, preventing a reduction in image resolution and enhancing optical detection accuracy by using a light source unit in the non-active region, thereby improving overall display performance.
Implementation Method 1
A light source unit is disposed in the first non-active region and emits light
Implementation Method 2
A scattering pattern layer is disposed on the encapsulation layer in the first non-active region and includes a plurality of holes
Implementation Method 3
A plurality of optical sensors is disposed in the active region and senses incident light emitted by the light source unit
Implementation Method 4
An encapsulation layer is disposed on the plurality of pixels, the plurality of optical sensors, and the light source unit
Data Source
AI summary
A display device includes a substrate having an active region and a first non-active region positioned around the active region. A plurality of pixels is disposed in the active region and emits light. A light source unit is disposed in the first non-active region and emits light. A plurality of optical sensors is disposed in the active region and senses incident light emitted by the light source unit. An encapsulation layer is disposed on the plurality of pixels, the plurality of optical sensors, and the light source unit. A scattering pattern layer is disposed on the encapsulation layer in the first non-active region and includes a plurality of holes.