Input Device Signal Compensation for Pointer Delay
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Solution Overview
Problem
Consumer-use AV devices, such as television receivers, experience significant delays in pointer movement due to slower MPU clocks, leading to uncomfortable operational feelings during input operations, especially when using remote controllers that detect operations in three-dimensional free space.
Innovation Solution
An input device with a detection unit, first and second acquisition units, and a compensation unit to detect user operations, acquire differential values, and compensate for delays in the operation signal, improving the operational feeling by enhancing the responsiveness of the pointer movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a remote controller detects operations in three-dimensional free space to enable diagonal pointer movement, then the pointer can be moved directly to intended positions, but the operation and pointer movement do not match in timing causing uncomfortable operational feeling
Solution Approach 1:
The patent applies preliminary action by calculating and storing the differential values (derivatives) of the operation signal in advance. The differentiation unit computes the rate of change of the operation signal, and this pre-computed differential information is then used by the synthesis unit to generate compensated signals that anticipate the timing mismatch, thereby resolving the delay issue before it affects the user experience.
Solution Approach 2:
The patent changes the temporal parameters of the operation signal by introducing differential values that represent the rate of change. By synthesizing a compensated operation signal that incorporates both the original signal and its differential components, the system transforms the timing characteristics to match the pointer movement speed, eliminating the operational discomfort caused by timing mismatches.
2Loss of energy
If the MPU clock in consumer-use AV devices is slowed down, then power consumption is reduced, but the pointer movement delay increases causing uncomfortable operational feeling
Solution Approach 1:
The patent replaces the mechanical approach of increasing CPU clock speed to reduce delay with a signal processing approach. Instead of relying on faster hardware processing, the system uses mathematical differentiation and signal synthesis to compensate for processing delays, thereby maintaining low power consumption while achieving responsive pointer movement through software-based timing correction.
3Speed
If the pointer movement speed is increased to reduce delay, then responsiveness is improved, but overshoot occurs when movement is stopped
Solution Approach 1:
The patent implements feedback by continuously monitoring the operation signal and its differential values, then using this information to adjust the compensated signal in real-time. The synthesis unit combines the original operation signal with the differentiated components, creating a feedback loop that ensures the pointer movement matches the user's operational intent without overshooting, thereby maintaining both speed and accuracy.
Data Source
AI summary
An input device includes a detection unit, a first acquisition unit, a second acquisition unit, and a compensation unit. The detection unit is configured to detect an operation by a user for controlling an electronic device and output an operation signal corresponding to the operation. The first acquisition unit is configured to acquire the detected operation signal and a differential value of the operation signal. The second acquisition unit is configured to acquire a function defined by the differential value to compensate for a delay in response of the operation signal with respect to the operation by the user. The compensation unit is configured to compensate the operation signal with the acquired function.