Touch Display Sensor Grouping for Response Speed
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Solution Overview
Problem
Large display systems with touch interfaces face inefficiencies in scan time due to uniform touch sensing cycles across multiple sensors, leading to prolonged refreshing timing and decreased response speed.
Innovation Solution
A method and apparatus that differentiate touch sensing cycles for sensors based on overlapping application regions and their display rankings, adjusting scan periods to optimize sensor operations and reduce unnecessary sensing tasks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If uniform touch sensing cycles are applied to all sensors in large display systems, then the system structure is simple and easy to control, but the scan time increases and response speed decreases
Solution Approach 1:
The patent segments the touch sensing operation by dividing sensors into multiple groups that operate with different sensing cycles. Instead of uniformly scanning all sensors at the same rate, the system creates first, second, and third sensor groups with progressively longer sensing cycles, thereby reducing the overall scan time while maintaining comprehensive touch detection coverage.
Solution Approach 2:
The patent implements dynamic sensing cycles where different sensor groups operate at different rates adaptively. The control apparatus dynamically assigns shorter sensing cycles to certain sensor groups and longer cycles to others based on their positions and detection priorities, optimizing the balance between response speed and power consumption in real-time.
2Ease of operation
If all sensors perform sensing operations at the same cycle, then the control method is simple, but the response speed of the touch display device decreases
Solution Approach 1:
The patent segments sensors into multiple operational groups with different sensing frequencies. First sensor groups scan at a higher frequency while second and third groups scan at lower frequencies, creating a hierarchical sensing structure that improves overall response speed without requiring complex individual control of each sensor.
Solution Approach 2:
The patent applies local quality by assigning different sensing cycle characteristics to different sensor groups based on their functional requirements. Certain regions of the display utilize faster sensing cycles for critical touch detection areas, while other regions use slower cycles, optimizing both response speed and operational simplicity through localized sensing strategies.
3Area of stationary object
If the number of sensors is increased to cover larger display areas, then the coverage area increases, but the average scan period increases and response speed decreases
Solution Approach 1:
The patent segments the large display area into multiple sensor groups that operate independently with different sensing cycles. This segmentation allows the system to maintain comprehensive coverage of large areas while reducing the average scan period by not requiring all sensors to complete full scanning cycles at the same rate.
Solution Approach 2:
The patent implements periodic action with varying periods across different sensor groups. By establishing multiple sensing cycles with different frequencies (first cycle, second cycle, third cycle), the system maintains continuous touch detection across large display areas while the alternating periodic patterns reduce the overall average scan time compared to uniform scanning of all sensors.
Data Source
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AI summary
A method in accordance with an embodiment is performed by a control apparatus. The method includes obtaining, when applications having a region within which the applications are overlapped with each other are displayed on the touch display device, information that one application of the applications is displayed to cover the other application of the applications or that said one application is displayed to be covered by the other application within the region; determining, based on the obtained information, touch sensing cycles for touch sensors among a plurality of touch sensors embedded in the touch display device to be different from each other, each of said at least two touch sensors sensing a corresponding part within an entire region where the applications are displayed on the touch display device; and controlling each of said at least two touch sensors to perform a sensing operation based on its touch sensing cycle.