Light-Shielding Layer Hole Width for Sensor Display Image Quality
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face challenges in maintaining image output performance when a sensor area is integrated within the display area, as light from adjacent pixels can be refracted by transmission parts, leading to image distortion.
Innovation Solution
Incorporating a light-shielding layer with a hole that overlaps the transmission part, positioned between first and second display elements, and electrically connected to pixel circuits, to prevent light interference and maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transmission part is provided in the sensor area to allow light transmission for sensor operation, then sensor functionality is enabled, but light from adjacent pixels is refracted causing image distortion
Solution Approach 1:
The light-shielding layer is divided into multiple segments: a main body portion covering pixel circuits, and a hole portion with reduced width aligned with the transmission part. This segmentation allows the light-shielding layer to simultaneously cover pixel circuits for light blocking and create a precise opening for sensor light transmission, resolving the contradiction between enabling sensor function and preventing image distortion.
Solution Approach 2:
The light-shielding layer exhibits spatially varying properties: it has full light-blocking capability over pixel circuits while having a reduced-width hole portion (width less than separation distance between display elements) aligned with the transmission part. This local differentiation in light-shielding properties enables simultaneous achievement of sensor light transmission and prevention of pixel light refraction at boundaries.
2Area of stationary object
If the display area is enlarged to increase display coverage, then display area increases, but the sensor area becomes integrated within the display area causing light interference
Solution Approach 1:
The light-shielding layer acts as an intermediary element between pixel circuits and the transmission part. By positioning the light-shielding layer between these components and creating a hole portion aligned with the transmission part, it mediates the interaction between pixel light and sensor area, allowing sensor light transmission while blocking pixel light from reaching the transmission part boundaries where refraction would occur.
3Productivity
If pixel circuits are positioned close to the transmission part to maximize display element density, then pixel density increases, but light diffraction through gaps between pixel circuits and transmission part occurs
Solution Approach 1:
The light-shielding layer is positioned in advance between pixel circuits and the transmission part to prevent light diffraction before it can occur. By creating a hole portion with width less than the separation distance between display elements and aligning it with the transmission part, the light-shielding layer proactively blocks light paths that would otherwise cause diffraction at the boundaries between pixel circuits and the transmission part.
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 prevents light diffraction through fine gaps between pixel circuits and transmission parts, enhancing image quality and preventing distortion, even when the sensor area is integrated within the display area.
Implementation Method 1
a light-shielding layer including a part overlapping the first pixel circuit and the second pixel circuit
Implementation Method 2
the light-shielding layer may include a hole corresponding to the transmission part, wherein the width of the hole of the light-shielding layer may be less than a separation distance between the first display element and the second display element
Data Source
AI summary
A display device including a display area and a sensor area which includes a transmission part comprises a substrate, display elements disposed on the substrate and including a first display element and a second display element spaced apart from each another with the transmission part therebetween, pixel circuits including a first pixel circuit electrically connected to the first display element and a second pixel circuit electrically connected to the second display element, and a light-shielding layer including a part overlapping the first pixel circuit and the second pixel circuit and the light-shielding layer includes a hole corresponding to the transmission part, the width of the hole of the light-shielding layer is less than a separation distance between the first display element and the second display element.