Display Flickering Method for Visual Fatigue Assessment
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Solution Overview
Problem
Conventional methods for detecting visual fatigue using display panels can only measure a single flicker frequency, making it difficult for users to determine their current eye fatigue level effectively.
Innovation Solution
A liquid crystal display device with a time sequence control circuit, display panel, and backlight source that outputs data and control signals to display images at multiple frame and backlight flicker frequencies, allowing users to view multiple frame flicker frequencies simultaneously and determine eye fatigue levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single flicker frequency is displayed, then the device complexity is reduced, but the measurement precision of visual fatigue assessment deteriorates
Solution Approach 1:
The display panel is divided into multiple display regions, with each region displaying images at different frame flicker frequencies. The backlight source is similarly divided into multiple backlight units that illuminate corresponding display regions at different backlight flicker frequencies. This segmentation allows multiple flicker frequencies to be displayed simultaneously without requiring a single complex system to switch between frequencies, thus improving measurement precision while keeping individual region complexity manageable.
Solution Approach 2:
The patent transitions from displaying a single flicker frequency in one dimension (time) to displaying multiple flicker frequencies simultaneously across different spatial dimensions (display regions). By mapping different flicker frequencies to different spatial locations on the display panel, the system enables comprehensive visual fatigue assessment across multiple frequencies without temporal switching, resolving the contradiction between measurement precision and device complexity.
2Adaptability or versatility
If multiple flicker frequencies are displayed simultaneously, then the visual fatigue assessment capability is improved, but the ease of operation deteriorates
Solution Approach 1:
The system incorporates a time sequence control circuit that receives input signals from users and automatically adjusts which display regions show which flicker frequencies based on user responses. This feedback mechanism allows the system to adapt to user needs and guide users through the assessment process, maintaining ease of operation while providing comprehensive multi-frequency visual fatigue testing capability.
Solution Approach 2:
The display system automatically manages the complex task of presenting multiple flicker frequencies and interpreting user responses. Users simply need to indicate their visual comfort level, and the time sequence control circuit autonomously determines the appropriate frequency ranges and adjusts the display configuration, making the versatile assessment capability easy to operate without requiring user expertise in flicker frequency concepts.
3Loss of information
If multiple frame flicker frequencies are displayed, then the information completeness for fatigue assessment is improved, but the difficulty of detecting and measuring deteriorates
Solution Approach 1:
The time sequence control circuit serves as an intermediary that manages the complex coordination between multiple display regions, frame flicker frequencies, and backlight flicker frequencies. It receives user input signals, determines appropriate frequency ranges, and controls the display and backlight systems accordingly. This intermediary abstracts the complexity of multi-frequency detection and measurement from the user, enabling complete visual fatigue information assessment while keeping the detection process simple for users.
Data Source
AI summary
A liquid crystal display device and a display flickering method are provided. The display flickering method includes receiving a first instruction signal and a color selection signal from a time sequence control circuit; outputting a data signal and a control signal according to the first instruction signal and the color selection signal; displaying an image by at least one frame display frequency according to the data signal; providing a backlight source for illuminating the display panel by at least one backlight flicker frequency according to the control signal, in which the display panel displays the at least one image having at least one frame flicker frequency according to the at least one backlight flicker frequency and the at least one frame display frequency.