Light Blocking Member with Asymmetric Line Widths for Touch Input
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Solution Overview
Problem
Existing display devices face challenges in accurately determining input coordinates without complex calculations and corrections, especially when using touch inputs, which can lead to inefficiencies and limitations in touch input systems.
Innovation Solution
A display device with a light blocking member having different line widths and a mesh structure on the sensing electrode, which absorbs or reflects infrared light, allowing for accurate input coordinate determination through a code pattern captured by an input device, enabling precise touch input recognition without complex calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex calculations and corrections are performed to determine input coordinates, then measurement precision may be improved, but device complexity and processing time increase
Solution Approach 1:
The light blocking member with encoded position information is pre-positioned on the sensing electrode, so that when an input device touches the display, the position code is immediately captured without requiring complex post-processing calculations. The position information is prepared in advance in a readily usable format.
Solution Approach 2:
Instead of calculating coordinates from raw touch data, the system uses a light blocking member that creates an optical copy or representation of position information through its patterned structure. The input device captures this optical pattern, and the position is determined by decoding the pre-encoded spatial arrangement rather than performing coordinate transformations.
2Measurement precision
If the light blocking member has a mesh structure surrounding emission areas, then input coordinate accuracy is improved, but manufacturing precision requirements increase
Solution Approach 1:
The light blocking member is divided into multiple segments or regions corresponding to different position codes. Each segment can be independently positioned or manufactured, and the overall position information is derived from the collective arrangement of these segments. This segmentation allows for more flexible manufacturing and alignment processes.
Solution Approach 2:
Different regions of the light blocking member have different local properties - some areas have light blocking patterns while others have different structures. The mesh structure surrounding emission areas has specific local characteristics that differ from other regions, allowing optimization of each area for its specific function while maintaining overall position encoding capability.
3Loss of information
If different line widths are used in the light blocking member, then position information encoding capability is improved, but manufacturing complexity increases
Solution Approach 1:
The light blocking member intentionally incorporates asymmetric features with different line widths to encode position information. The first and second parts have deliberately different dimensions, creating an asymmetric pattern that carries spatial information. This asymmetry is the core encoding mechanism, where the relative sizes and positions of different width lines represent position data.
Solution Approach 2:
The system encodes position information by varying physical parameters of the light blocking member, specifically the line width parameter. Different line widths serve as distinct states or values in the position encoding scheme. By changing this geometric parameter across different regions, the system embeds position information directly in the physical structure.
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 solution enables accurate and efficient touch input recognition by simplifying the calculation of input coordinates, reducing costs and power consumption, and allowing for the display device to be applied across various electronic devices with touch functions.
Implementation Method 1
The light blocking member may absorb light of a specific wavelength, and another portion of the sensing electrode that does not overlap with the light blocking member may reflect light of the specific wavelength. The light blocking member may absorb an infrared ray and the sensing electrode may reflect an infrared ray.
Implementation Method 2
another portion of the sensing electrode that does not overlap with the light blocking member may reflect light of the specific wavelength
Data Source
AI summary
A display panel of a display device includes emission areas and a non-emission area between adjacent ones of the emission areas. A sensing electrode is disposed on the non-emission area of the display panel. A light blocking member is disposed on a portion of the sensing electrode. The light blocking member absorbs light of a specific wavelength, and another portion of the sensing electrode that does not overlap with the light blocking member reflects light of the specific wavelength. When viewed on a plane, the light blocking member includes a first part and a second part having different line widths in a first direction.