Display Device Mark-Based Position Tracking
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Solution Overview
Problem
Existing display devices with liquid crystal display panels face challenges in accurately associating movable members with image objects due to variations in liquid crystal response speed caused by temperature changes, requiring extensive corrected data for different types of liquid crystals and potentiometer resistance variations.
Innovation Solution
A display device configuration that includes a liquid crystal display panel, a movable member, a movable member driving mechanism, a display controller, and a drive controller, where the display controller controls the image and a mark on the screen to maintain the association of the movable member's movement with the image object's position through a mark in a second display area, utilizing light detectors to maintain light level differences within a predetermined range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If compensated data is stored for each liquid crystal type and temperature condition to maintain display accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent uses a mark displayed on the display screen as a visual copy representation of the movable member's position. Instead of storing and processing compensated data for each liquid crystal type and temperature condition, the system displays a mark that visually indicates the position, allowing users to understand the association without requiring complex data storage and processing mechanisms.
Solution Approach 2:
The mark displayed on the screen acts as an intermediary between the movable member and the user's perception. Rather than directly providing precise position data through complex compensation algorithms, the mark serves as a visual mediator that conveys position information in a simple and intuitive manner, eliminating the need for extensive corrected data storage.
2Reliability
If extensive corrected data is stored for different liquid crystal types and temperatures to maintain association accuracy, then reliability is improved, but loss of time increases
Solution Approach 1:
The patent extracts the essential information needed for association (the mark's position on the screen) and separates it from the complex liquid crystal compensation data. By taking out only the necessary visual indication through the mark, the system maintains reliable association without requiring time-consuming data processing for different liquid crystal types and temperature conditions.
Solution Approach 2:
Instead of using complex, long-term data storage solutions that require extensive corrected data, the patent employs a simple, transient visual mark that is displayed and processed in real-time. This disposable-like approach uses minimal processing resources for each frame, avoiding the time burden of loading and processing extensive pre-stored compensation data.
3Measurement precision
If light level difference between mark and background is increased to improve detection accuracy, then measurement precision is improved, but illumination intensity consumption increases
Solution Approach 1:
The patent applies local quality by creating a mark with distinct brightness characteristics only in the specific region where position information needs to be conveyed. The mark uses a brightness level that is different from the background, providing sufficient contrast for detection without requiring excessive illumination intensity throughout the entire display area. This localized approach maintains measurement precision while minimizing overall light consumption.
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
This configuration allows for accurate and simple association of movable members with image objects on the display screen, reducing the need for extensive corrected data storage and maintaining consistent movement characteristics across temperature changes, enhancing the stability and accuracy of image display.
Implementation Method 1
light detectors provided in the movable member and configured to detect light from the mark
Data Source
AI summary
A display device includes movable members arranged to face a display screen of a liquid crystal display panel, a movable member driving mechanism, a display controller that controls the display of an image in a first display area and controls the display of a predetermined mark in a second display area on the liquid crystal display panel, and a drive controller that controls the movable member driving mechanism to move the movable members in accordance with a movement of the mark displayed. The display of an image object in the first display area and the display of the mark in the second display area are controlled so that the position of the image object displayed in the first display area corresponds to the position of the mark displayed in the second display area.