Touch Display Controller Resolving Coordinate Conflicts
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Solution Overview
Problem
Existing display apparatuses using digital pen methods with IR sensing units cannot recognize touches by fingers or other objects simultaneously with digital pen inputs, leading to issues with multi-touch inputs and coordinate value conflicts between different touch sensing methods.
Innovation Solution
A display apparatus with both a digital pen touch sensing unit and another touch sensing method (such as resistive, camera, IR, optical, or ultrasonic wave) that compares coordinate values from both units to determine if the input is single or multi-touch, allowing for appropriate coordinate value display based on the distance between sensed points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a touch panel uses a digital pen method with IR sensing unit, then coordinate recognition precision is improved, but the ability to recognize touches by fingers or other objects is lost
Solution Approach 1:
The touch panel is designed to support multiple input methods (digital pen, finger, and other objects) simultaneously by integrating both a digital pen touch sensing unit and another touch sensing method. This allows the system to recognize various types of touches without being limited to a single input method, thereby achieving multi-functionality and versatility in touch input recognition.
2Adaptability or versatility
If both digital pen touch panel and other method touch panel are used simultaneously, then touch input versatility is improved, but coordinate value conflict occurs from one point
Solution Approach 1:
A coordinate value determination unit is introduced as an intermediary component that receives coordinate values from both the digital pen touch sensing unit and the other method touch sensing unit. This mediator compares the coordinate values and determines the final coordinate value to be used, preventing coordinate conflicts and ensuring accurate coordinate representation when multiple input methods are used simultaneously.
3Reliability
If one coordinate value is prioritized over another, then coordinate conflict is resolved, but multi-touch input capability is lost
Solution Approach 1:
The system dynamically determines which coordinate value to use based on the input method being employed. When only one input method is used, that coordinate value is used directly. When multiple input methods are used simultaneously, the coordinate value determination unit compares the coordinate values and selects the appropriate one. This dynamic approach maintains coordinate consistency while preserving multi-touch input capability, as the system can adapt its coordinate selection strategy based on the current input situation.
Data Source
AI summary
A method and apparatus for displaying an object are provided. The display apparatus includes a display unit which displays an object, a first touch sensing unit which senses a user input by a first input method, a second touch sensing unit which senses a user input by a second input method, a coordinate calculation unit which calculates coordinate values sensed by the first and the second touch sensing units, and a controller which, in response to a user input being simultaneously sensed by the first and the second touch sensing units, compares the coordinate values sensed by the first and the second touch sensing units and determines whether the user input is a single touch input or a multi-touch input, and, according to a result of the determination, controls to display the object on the display unit.