Display Panel With Low-Density Touch Meshes for Under-Display Optics
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Solution Overview
Problem
Existing display devices face challenges in integrating optical electronic devices such as cameras and sensors without reducing the display area or exposing them on the front side, leading to increased bezel size and design constraints.
Innovation Solution
A display panel design where optical electronic devices are positioned at the backside of the display area, with a light transmission structure and a touch panel on the front side, featuring larger meshes and electrodes in specific areas to maintain touch sensitivity and reduce electrode density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical electronic devices are installed on the front side of the display panel to receive light, then the optical devices can function properly, but the display area is reduced and the bezel size increases
Solution Approach 1:
The patent inverts the conventional placement of optical electronic devices from the front side to the back side of the display panel. The optical devices are positioned in the non-display area at the rear, allowing light to pass through the display panel to reach them, thereby maintaining full display area while ensuring optical functionality.
Solution Approach 2:
The patent transitions from a two-dimensional front-side placement to a three-dimensional rear-side placement. By moving optical devices to the back side and utilizing the depth dimension of the display panel structure, the solution accommodates optical electronic devices without compromising the front display area.
2Ease of operation
If a touch panel is added to the front side of the display panel, then touch sensitivity is improved, but the area available for light transmission to optical devices is reduced
Solution Approach 1:
The patent segments the display panel into distinct functional zones: a touch-sensitive display area on the front side and a light transmission area on the back side. The touch panel is positioned in the non-display area, while the display area includes dedicated light transmission regions that allow optical devices to receive light without interference from touch sensors.
Solution Approach 2:
The patent applies different functional qualities to different regions of the display panel. The front side is optimized for touch sensitivity with touch panel structures, while the back side includes specific areas optimized for light transmission to optical devices. This local differentiation allows both functions to coexist without mutual interference.
3Adaptability or versatility
If the display panel structure is made more complex to accommodate optical devices and touch panel, then functionality is improved, but manufacturing complexity increases
Solution Approach 1:
The patent designs the display panel to serve multiple functions simultaneously. The same panel structure accommodates display functionality, touch sensing, and optical device integration. By making the panel multi-functional rather than adding separate components for each function, the patent reduces overall system complexity while improving adaptability.
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 design maintains a large display area while incorporating optical electronic devices without exposing them, reducing bezel size and ensuring high touch sensitivity.
Implementation Method 1
a light transmission structure in which optical electronic devices are provided at the back side of a display area of the display panel to allow the optical electronic devices to receive light normally
Implementation Method 2
a capacitive touch electrode configured to detect a capacitance generated between a driving touch electrode and a sensing touch electrode by a mutual capacitance sensing method
Data Source
AI summary
A display device includes a substrate having a display area and a non-display area adjacent to the display area. The display area includes a first sub-display area having a plurality of light transmission areas and a second sub-display area adjacent to the first sub-display area. The display device further include a touch sensor disposed on an encapsulation layer and including a plurality of mesh-type touch electrodes. The touch electrodes include a plurality of first touch electrodes disposed in a first touch area corresponding to the first sub-display area and a plurality of second touch electrodes disposed in a second touch area corresponding to the second sub-display area. Further, the density of the plurality of first touch electrodes in the first touch area is lower than the density of the plurality of second touch electrodes in the second touch area.