Optical Path Adjusting Member for Under-Display Sensor Diffraction
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Solution Overview
Problem
The challenge is to minimize the impact of diffracted light on image quality in electronic devices with display panels, where opaque pixel circuits and wiring patterns cause irregular reflection, refraction, and diffraction of incident light, degrading the image captured by sensors disposed under the display panel.
Innovation Solution
The solution involves an image display device with a two-dimensional array of pixels, including a self-emitting device, a luminous region, a nonluminous region with a transmissive window, and an optical path adjusting member that refracts light to align it closer to the normal of the transmissive window, reducing diffracted light entry into image sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the image sensor module is disposed immediately under the display panel to minimize bezel width, then the device achieves miniaturization and maximum screen size, but diffracted light from the display panel degrades image quality
Solution Approach 1:
A transparent optical path adjusting member is introduced between the display panel and the image sensor module. This intermediary component refracts the diffracted light generated by the display panel's opaque structures, redirecting it away from the image sensor module's light receiving area, thereby resolving the conflict between miniaturization and image quality
Solution Approach 2:
The optical path adjusting member changes the optical parameters (direction and path) of the diffracted light through refraction. By altering the light's propagation direction, the system prevents diffracted light from reaching the image sensor while maintaining the compact design
2Reliability
If opaque members (pixel circuits and wiring patterns) are used in each pixel to ensure proper display function, then the display achieves proper light emission control, but these opaque members cause irregular reflection, refraction, and diffraction that degrade image quality
Solution Approach 1:
The patent converts the harmful diffracted light into a beneficial effect by using the same opaque structures (pixel circuits and wiring patterns) that cause diffraction to also serve as light-blocking elements. By strategically designing these structures and combining them with the optical path adjusting member, the system makes the harmful diffracted light contribute to blocking unwanted light while maintaining proper display function
Solution Approach 2:
The optical path adjusting member acts as an intermediary that mediates between the opaque structures causing diffraction and the image sensor receiving light. It refracts the diffracted light away from the sensor while allowing the opaque structures to maintain their display function
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 configuration effectively suppresses diffracted light, enhancing image quality by minimizing its influence on the image captured by sensors, thereby improving the overall performance of electronic devices with integrated sensors.
Implementation Method 1
an optical path adjusting member that is disposed on a light emission side opposed to the light entry side of the transmissive window and adjusts the optical path of light having passed through the transmissive window
Data Source
AI summary
[Problem] Provided is an image display device and an electronic device that can suppress the influence of diffracted light.[Solution] An image display device includes a plurality of pixels in a two-dimensional array, wherein each of some of the plurality of pixels includes: a first self-emitting device, a first luminous region illuminated by the first self-emitting device, a nonluminous region having a transmissive window that allows passage of visible light, and an optical path adjusting member that is disposed on a light emission side opposed to the light entry side of the transmissive window and adjusts the optical path of light having passed through the transmissive window.