Pointing Device Block Boundary Error Correction
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Solution Overview
Problem
Existing pointing devices face challenges in accurately calculating their location on a display apparatus, particularly at the boundaries between blocks, due to weak optical signals and errors in sensing resolution, which affects the precision of location detection.
Innovation Solution
A pointing device equipped with an optical sensor and a controller that senses multiple optical signals to calculate the current location and correct errors at block boundaries by adjusting location information, ensuring accurate positioning on a display apparatus divided into blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the block driving method is used to generate light in blocks to improve sensing resolution and prevent weak optical signals, then sensing resolution is improved, but location errors occur at block boundaries
Solution Approach 1:
The system uses feedback by comparing the sensed block index with the calculated block index derived from optical signal timing. When a mismatch is detected at block boundaries, the system corrects the location information to ensure accuracy, thereby resolving the boundary error problem while maintaining high sensing resolution
Solution Approach 2:
The system performs preliminary location calculation using optical signal timing before final position determination. By calculating the expected block index in advance and comparing it with the sensed block index, the system can identify and correct boundary errors before they affect the final location accuracy
2Device complexity
If the sequence driving method is used to generate light in X-axis and Y-axis sequence, then the location sensing process is simplified, but the optical signal becomes weak and resolution decreases
Solution Approach 1:
The system segments the light generation process into blocks, where each block emits light in sequence. This segmentation allows the pointing device to sense multiple optical signals from different blocks, improving sensing resolution while maintaining a relatively simple sensing process by processing each block independently
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
The solution effectively prevents errors at block boundaries, enhancing the accuracy of location calculation and improving sensing resolution, allowing for precise tracking of the pointing device's position on the display.
Implementation Method 1
an optical sensor which senses a plurality of optical signals
Data Source
AI summary
A pointing device and a display apparatus applying the same are provided. The pointing device corrects an error that occurs in a boundary between block in calculating a current location of the pointing device and calculates the current location. Accordingly, an error occurring in a boundary between blocks in calculating a current location of the pointing device is prevented.