Touch Display Code Pattern Layout for Precise Input Coordinates
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Solution Overview
Problem
Existing display devices face challenges in accurately determining input coordinates without complex calculations or corrections, leading to increased costs and power consumption, particularly in touch input systems.
Innovation Solution
A display device and input system that incorporates a light emitting element, touch electrodes, and light blocking parts with specific code patterns to enable accurate input coordinate detection without complex calculations, using inorganic and organic black pigments for light blocking and position information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex calculation or correction is used to generate input coordinate data, then measurement precision is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent applies preliminary action by pre-defining code patterns with position information in the light blocking area during the manufacturing stage. These code patterns are embedded in the display device structure itself, so that when an input device captures an image, the coordinates can be directly extracted from the visual code without requiring complex real-time calculations or corrections. This shifts the computational work from runtime to design time, resolving the contradiction between precision and complexity.
2Measurement precision
If complex calculation or correction is used to generate input coordinate data, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The patent replaces the mechanical/computational system of complex coordinate calculations with an optical system. By encoding position information directly into visual code patterns that can be captured by an input device's image sensor, the system eliminates the need for power-intensive mathematical computations. The coordinate information is transmitted optically through the display medium itself, significantly reducing power consumption while maintaining precision.
3Measurement precision
If complex calculation or correction is used to generate input coordinate data, then measurement precision is improved, but the driving process becomes more complex
Solution Approach 1:
The patent extracts the coordinate information generation process from the complex calculation system and embeds it directly into the display structure as visual code patterns. By taking out the computational complexity and replacing it with pre-encoded positional codes, the driving process is simplified to merely capturing and decoding these visual patterns, making the system easier to operate while maintaining high precision.
4Measurement precision
If code patterns with position information are embedded in the light blocking area, then input coordinate accuracy is improved, but the display area is reduced
Solution Approach 1:
The patent applies local quality by placing code patterns specifically in the light blocking area (non-display region) surrounding the emission areas. This localized placement ensures that the code patterns occupy only the peripheral regions that would otherwise not be contributing to the visible display area. The emission areas maintain their full brightness and color properties, while the surrounding light blocking areas serve dual purposes: maintaining display integrity and encoding position information.
Data Source
AI summary
A display device comprises a display part including a light emitting element disposed in a plurality of emission areas to emit light, a plurality of touch electrodes disposed in a light blocking area surrounding the plurality of emission areas on the display part to sense a touch, a first light blocking part disposed in a part of the light blocking area on the plurality of touch electrodes, a second light blocking part disposed in another part of the light blocking area on the plurality of touch electrodes, and a code pattern determined by a planar shape of the second light blocking part to have position information. The first light blocking part comprises one of an inorganic black pigment and an organic black pigment, and the second light blocking part comprises the other of the inorganic black pigment and the organic black pigment.