Infrared Code Pixels for Precise Touch Coordinate Detection
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Solution Overview
Problem
Current display devices face challenges in accurately detecting input coordinates without complex computation or correction processes, especially when using input devices like pens, and struggle with size limitations in various electronic applications.
Innovation Solution
Incorporating code pixels emitting infrared light in the same layer as the display pixels, which form a code pattern providing position information, allowing for direct conversion of input data into coordinate data without complex processing, and enabling application across diverse electronic devices without size constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If code pixels emitting infrared light are incorporated in the same layer as display pixels, then input coordinate detection precision is improved and complex computation processes are eliminated, but device structure complexity increases
Solution Approach 1:
The patent merges the display pixel layer and code pixel layer into a single integrated structure. The code pixels emitting infrared light are disposed in the same layer as the display pixels, eliminating the need for separate sensing layers and reducing overall device complexity while improving coordinate detection precision through direct optical encoding.
Solution Approach 2:
The integrated pixel layer serves dual functions: display pixels emit visible light for image display, while code pixels emit infrared light for coordinate encoding. This multi-functional design eliminates the need for separate sensing components, resolving the contradiction between improved measurement precision and reduced device complexity.
2Ease of manufacture
If code pixels are disposed in the same layer as display pixels, then manufacturing process is simplified and cost is reduced, but detection of infrared light may be interfered with by visible light from display pixels
Solution Approach 1:
The patent applies local quality by assigning different spectral emission characteristics to different pixel types within the same layer. Display pixels are optimized for visible light emission, while code pixels are optimized for infrared light emission. This spectral separation eliminates light interference while maintaining the manufacturing simplicity of a single-layer structure.
Solution Approach 2:
The patent utilizes different wavelengths of light (visible vs. infrared) emitted by different pixel types. The code pixels emit infrared light that is spectrally distinct from the visible light emitted by display pixels, allowing the sensing system to distinguish and detect code patterns without interference from display content.
3Productivity
If infrared light-emitting elements are used for code patterns, then position information can be provided without complex processing, but power consumption increases
Solution Approach 1:
The patent implements periodic action by controlling code pixels to emit infrared light only during specific time intervals when coordinate input is detected or anticipated. This pulsed emission pattern reduces overall power consumption compared to continuous emission, while still providing sufficient infrared signals for accurate coordinate detection and efficient processing.
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 precise and efficient detection of input coordinates, reduces cost and power consumption, and simplifies the driving process, while allowing the display device to be applied to a wide range of electronic devices without size limitations.
Implementation Method 1
code pixels including infrared light-emitting elements, the infrared light-emitting elements emit infrared light
Data Source
AI summary
A display device is disclosed that includes a plurality of pixels and a plurality of code pixels. The pixels include light-emitting elements, which display an image. The code pixels are disposed in the same layer as the pixels and are adjacent to a reference point disposed between the pixels. The code pixels include infrared light-emitting elements, which emit infrared light. At least one of the code pixels, disposed in a particular direction from the reference point, emit the infrared light to provide a code pattern having position information.