Image Display Device Transmissive Window Diffracted Light Suppression
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Solution Overview
Problem
The challenge is to suppress diffracted light in image display devices, which is caused by opaque members and insulating layers in display panels, leading to reduced image quality due to irregular reflection, refraction, and diffraction of incident light.
Innovation Solution
The solution involves an image display device with pixels that include a self-emitting device, a luminous region, and a nonluminous region with a transmissive window, allowing visible light to pass through, and an optical member to refract and collimate light, guiding it into the transmissive window and subsequently to a light receiver.
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 outer dimensions, then the device achieves miniaturization and reduced bezel width, but diffracted light enters the image sensor module causing reduced image quality
Solution Approach 1:
A light blocking member is introduced as an intermediary component between the display panel and image sensor module. This member selectively blocks diffracted light while allowing direct light to pass through to the image sensor, thereby resolving the contradiction between miniaturization and image quality by filtering out harmful diffracted light in the limited space
Solution Approach 2:
The harmful diffracted light is extracted and separated from the light path by positioning the light blocking member to intercept only the diffracted light components. This allows the direct light to reach the image sensor while removing the detrimental diffracted light, achieving both compact design and high image quality
2Adaptability or versatility
If opaque members such as pixel circuits and wiring patterns are present in each pixel, then the display panel can function as a display device, but these members cause irregular reflection, refraction, and diffraction of incident light
Solution Approach 1:
The light blocking member serves as a mediator that compensates for the harmful effects of necessary opaque members (pixel circuits and wiring patterns). By strategically positioning this intermediary element, the display function is maintained while the diffracted light generated by the opaque members is blocked before reaching the image sensor
Solution Approach 2:
The presence of opaque members is accepted as necessary for display functionality, and the light blocking member is positioned to convert the harmful diffracted light they generate into a manageable issue. The blocking member transforms the problem of diffracted light into a solved issue by selectively intercepting it while preserving the 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 reduces diffracted light, enhancing image quality by minimizing the impact of diffraction on the image sensor module, thereby improving the accuracy of the subject image.
Implementation Method 1
an optical member that is disposed on the light entry side of the transmissive window and refracts incident light so as to guide the light into the transmissive window
Implementation Method 2
a second optical system that collimates the light refracted by the first optical system
Data Source
AI summary
[Problem] Provided is an image display device and an electronic device that can suppress the occurrence of diffracted light.[Solution] An image display device includes a plurality of pixels arranged in a two-dimensional array, wherein the plurality of pixels include at least some pixels, each having: a first self-emitting device, a first luminous region illuminated by the first self-emitting device, and a nonluminous region having a transmissive window that allows the passage of visible light.