Liquid Crystal Display Adaptive Image Sensor and Drive Control
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Solution Overview
Problem
Liquid crystal display apparatuses face challenges in maintaining image quality and reducing load when switching between high-sensitivity and high-speed modes, as existing display control methods require changes in exposure time, charging time, and response time, leading to increased complexity and potential image blurring.
Innovation Solution
The apparatus employs an image sensor that outputs signals at different exposure times (1/120 s and 1/240 s) for high-sensitivity and high-speed modes, respectively, with the display device performing progressive drive in the first mode and interlace drive in the second mode, allowing for adaptive display control without altering charging or response times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the image sensor is driven in the second mode with shorter exposure time, then the sensitivity is improved, but the image quality deteriorates due to potential blurring
Solution Approach 1:
The display period is segmented into multiple sub-periods corresponding to different exposure times. The image sensor outputs image signals at different frame rates (e.g., 60fps for first mode, 120fps for second mode), and the display device displays these signals in a segmented manner to maintain image quality while achieving high sensitivity in the second mode.
Solution Approach 2:
The display device dynamically adjusts its display control based on the drive mode of the image sensor. When the image sensor switches between first and second modes, the display device adapts by changing the display period and sub-period allocation, ensuring optimal image quality for each mode while maintaining the benefits of shorter exposure times.
2Manufacturing precision
If the display device performs progressive drive in the first mode, then the image quality is maintained, but the productivity is reduced compared to interlace drive
Solution Approach 1:
The display device employs periodic action by alternating between different display modes. In the first mode, progressive drive is used for high image quality, while in the second mode, interlace drive is utilized to achieve higher refresh rates. This periodic switching allows the system to optimize for either quality or speed depending on the current operational requirements.
3Use of energy by moving object
If the exposure time is changed between modes, then the sensitivity is improved, but the device complexity increases due to multiple time parameters
Solution Approach 1:
The display device is designed with multi-functionality to handle both progressive and interlace drive modes, as well as multiple frame rates (60fps, 120fps). This universal design allows the same hardware to efficiently manage different exposure times and display modes without requiring separate dedicated circuits for each mode, thereby reducing overall device complexity.
4Use of energy by moving object
If the charging time and response time are altered for the second mode, then the sensitivity is improved, but the device complexity increases
Solution Approach 1:
The invention utilizes parameter changes by adjusting the display period and sub-period allocation based on the image sensor's drive mode. Instead of fundamentally changing the charging and response time mechanisms, the system modifies the temporal parameters of the display control (display period, sub-period ratios) to achieve the desired sensitivity improvement while maintaining manageable device complexity.
Data Source
AI summary
According to one embodiment, a liquid crystal display apparatus includes an image sensor configured to output an image signal when the image sensor is driven in a first mode and a second mode, and a display device configured to display an image on a display panel based on the image signal. The image sensor is configured to output an image signal every first exposure time when the image sensor is driven in the first mode, and to output an image signal every second exposure time when the image sensor is driven in the second mode. The display device is configured to display an image in accordance with progressive drive when the image sensor is driven in the first mode, and to display an image in accordance with interlace drive when the image sensor is driven in the second mode.