Curved Touch Display With Intersecting Optical Beams
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Solution Overview
Problem
Touch display devices with curved screens suffer from low accuracy in touch identification due to the arrangement of optical pair transistor groups on the edges, which occupy a large space and distort the light rays, leading to inaccurate touch point detection.
Innovation Solution
The touch display device employs at least two optical pair transistor groups with emitters and receivers disposed on opposite edges of a curved screen, forming intersecting light rays to create a grid-like scanning plane, reducing the distance between light rays and the screen surface, and optimizing the arrangement to improve detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If optical pair transistor groups are arranged on the edges of the display screen, then the structure is simplified, but the touch identification accuracy deteriorates due to large occupied space and light ray distortion
Solution Approach 1:
The patent transitions from a single-plane edge arrangement to a multi-dimensional spatial configuration where optical pair transistor groups are distributed across different edges of the curved display screen. This dimensional change allows light rays to intersect at multiple angles, creating a grid-like scanning plane that improves touch detection accuracy while maintaining structural simplicity.
Solution Approach 2:
The patent applies different arrangement configurations to different edges of the display screen, with each optical pair transistor group optimized for its specific edge position. This local optimization allows each group to contribute effectively to touch detection in its local region, improving overall accuracy without requiring a complete redesign of the entire system.
2Measurement precision
If optical pair transistor groups are arranged on opposite edges with intersecting light rays, then touch identification accuracy is improved, but the occupied space increases
Solution Approach 1:
The patent utilizes the curved surface of the display screen to naturally guide light rays from opposite edges to intersect on the screen surface. The curvature allows light rays to converge without requiring additional optical elements or increasing the overall device footprint, thus improving accuracy while minimizing occupied space.
Solution Approach 2:
The patent combines the functions of multiple optical pair transistor groups arranged on different edges into a unified scanning system. By merging their detection functions and coordinating their light ray intersections, the system achieves comprehensive touch detection coverage without proportionally increasing the occupied space.
3Measurement precision
If multiple optical pair transistor groups are used with intersecting light ray extension directions, then a grid-like scanning plane is formed improving detection accuracy, but the device complexity increases
Solution Approach 1:
The patent designs each optical pair transistor group to serve multiple functions: detecting touch events, determining touch position, and contributing to the grid-like scanning pattern. This multi-functionality allows the system to achieve high detection accuracy with a relatively simple structure, as each component performs several roles simultaneously.
Solution Approach 2:
The patent divides the touch detection function into multiple independent optical pair transistor groups distributed on different edges. Each group operates semi-independently, scanning a portion of the display screen, and their results are combined to form the complete grid-like scanning plane. This segmentation allows for modular design and reduced overall complexity.
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 enhances touch identification accuracy by minimizing the distance between light rays and the screen surface, reducing the occupied space, and simplifying the device structure while maintaining ergonomic compatibility with curved surfaces.
Implementation Method 1
each of the through-beam units includes an emitter and a receiver, the emitter is disposed on an outer side of the first edge, the receiver is disposed on an outer side of the second edge, and a light outlet of the emitter is oriented towards a light inlet of the receiver
Implementation Method 2
an extension direction of a light ray emitted by the through-beam unit in the first optical pair transistor group is intersected with an extension direction of a light ray emitted by the through-beam unit in the second optical pair transistor group
Data Source
AI summary
Provided is a touch display device, including: a curved display screen and at least two optical pair transistor groups. The display screen has a curved first edge and a curved second edge. The optical pair transistor group includes a plurality of through-beam units. Each through-beam unit includes an emitter, disposed on an outer side of the first edge, and a receiver, disposed on an outer side of the second edge. A light outlet of the emitter is oriented towards a light inlet of the receiver. The at least two optical pair transistor groups include a first optical pair transistor group and a second optical pair transistor group. An extension direction of a light ray emitted by the through-beam unit in the first optical pair transistor group is intersected with an extension direction of a light ray emitted by the through-beam unit in the second optical pair transistor group.