Touch Detection for Spliced Displays Using Interval Compensation
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Solution Overview
Problem
In splicing display systems with touch functionality, the physical position of a touch point often deviates from the corresponding pixel position due to splicing intervals, leading to reduced touch precision.
Innovation Solution
A touch detection method and apparatus that calculates the position of a pixel unit corresponding to a touch point by obtaining the sizes of display units and splicing intervals, determining if the touch point is within these intervals, and using infrared detection to establish a two-dimensional coordinate system to accurately determine the pixel unit's row and column number.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If splicing display units are used to form a large screen, then the display area is increased, but the physical position of touch point deviates from the corresponding pixel position due to splicing intervals
Solution Approach 1:
The patent introduces splicing interval information as an intermediary parameter to bridge the gap between physical touch position and pixel position. By obtaining the position information of splicing intervals and using it as a mediator in the coordinate transformation process, the system can accurately convert physical touch coordinates to corresponding pixel coordinates despite the presence of splicing intervals between display units.
Solution Approach 2:
The patent changes the parameter system from direct pixel coordinate mapping to a transformed coordinate system that incorporates splicing interval information. By introducing parameters such as splicing interval position, display unit size, and splicing interval width, the system transforms the touch detection problem into a coordinate transformation problem that accounts for the physical gaps between spliced display units.
2Ease of operation
If simple touch detection is used, then the detection process is simple, but the touch precision is reduced due to splicing intervals
Solution Approach 1:
The patent performs preliminary actions by pre-obtaining the position information of splicing intervals, display unit sizes, and splicing interval widths before touch detection. These pre-calculated parameters are stored and ready for use in the touch detection process, allowing the system to quickly and accurately transform touch coordinates without complex real-time calculations during user interaction.
Solution Approach 2:
The patent replaces complex mechanical coordinate transformation mechanisms with a mathematical calculation approach. Instead of using complex hardware adjustments or mechanical alignment systems, the invention uses mathematical formulas that incorporate splicing interval information to transform touch coordinates to pixel coordinates, achieving high precision through computational methods rather than mechanical complexity.
Data Source
AI summary
The present disclosure provides a touch detection method for a touch splicing screen, including: obtaining the following parameters: sizes of each of the display units in a row direction and in a column direction, a width of each of the first splicing intervals, a width of each of the second splicing intervals, and physical position information of a touch point; determining whether the touch point is within an area of the splicing intervals according to the parameters; and calculating, when the touch point is beyond the area of the splicing intervals, a position of a pixel unit corresponding to the touch point according to a resolution of the touch splicing screen, a row number and a column number in an arrangement of the display units, and the parameters.