Under-Display Color Filter Opening for Wide-Angle Image Capture
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Solution Overview
Problem
Display devices face challenges in achieving high viewing angle characteristics and high image capturing performance simultaneously, with conventional technologies struggling to provide clear image capture and wide viewing angles due to light interference and scattering.
Innovation Solution
Incorporation of a light-emitting and light-receiving element with a color filter having an opening portion, a light-blocking layer, and a functional layer with a low refractive index to control light transmission and reception angles, enhancing both image display and capture capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional display device structure is used, then the device can display images, but it cannot clearly capture images of fingerprints or other objects
Solution Approach 1:
The display device is designed to perform multiple functions: image display and image capturing. The light-emitting and light-receiving element serves dual purposes - emitting light for display and receiving light for capturing, eliminating the need for separate camera components and enabling both display and capture capabilities within the same device structure.
Solution Approach 2:
The patent combines the light-emitting function and light-receiving function into a single integrated element. The color filter with opening portion is positioned to allow the same element to both emit light for display and receive light for capturing, merging two previously separate functions into one component.
2Illumination intensity
If the viewing angle is widened, then display quality improves, but image capturing performance deteriorates due to light scattering
Solution Approach 1:
The color filter is designed with spatially varying properties - it has different transmission characteristics in different regions. The opening portion allows light transmission in specific directions while the surrounding color filter material blocks light in other directions, creating local optical quality variations that simultaneously support wide viewing angles and clear image capturing.
Solution Approach 2:
The color filter is segmented into functional regions: an opening portion that transmits light and surrounding color filter material that blocks light. This segmentation allows different parts of the color filter to perform different optical functions - the opening portion enables light transmission for display while the surrounding material prevents light scattering that would degrade capturing performance.
3Adaptability or versatility
If a separate camera component is added for image capturing, then capturing function is achieved, but device complexity and component count increase
Solution Approach 1:
The light-emitting and light-receiving element is designed to perform multiple functions - it emits light for display purposes and simultaneously receives light for capturing purposes. This multi-functionality eliminates the need for separate camera components such as dedicated light-receiving elements or lenses, thereby reducing device complexity while achieving image capturing capability.
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 enables display devices to achieve improved viewing angles and clear image capture by selectively transmitting and blocking light, reducing noise and enhancing sensitivity, while also reducing the number of components and providing multifunctionality.
Implementation Method 1
Light-emitting elements (also referred to as EL elements) utilizing an electroluminescence (hereinafter referred to as EL) phenomenon
Implementation Method 2
a light-emitting and light-receiving element having a function of emitting light of a first color and a function of receiving light of a second color
Implementation Method 3
The color filter is positioned over the light-emitting and light-receiving element and has a function of transmitting the light of the first color and a function of blocking the light of the second color
Implementation Method 4
a functional layer with a low refractive index to control light transmission and reception angles
Data Source
AI summary
A display device provided with an image capturing function is provided. A display device with both high viewing angle characteristics and high image capturing performance is provided. The display device includes a light-emitting and light-receiving element and a color filter. The light-emitting and light-receiving element includes a light-emitting and light-receiving region having a function of emitting light of the first color and a function of receiving light of the second color. The color filter is positioned over the light-emitting and light-receiving element and has a function of transmitting the light of the first color and a function of blocking the light of the second color. The color filter includes an opening portion. The light-emitting and light-receiving region includes a portion positioned in the inside of the opening portion in the plan view.