Display Control System Bright Dark Field Alternation
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Solution Overview
Problem
Current spatial light modulator technologies face challenges in achieving high precision and efficient manufacturing due to the need for high-speed light valve switching, which results in low precision and increased difficulty in manufacturing.
Innovation Solution
A display control system that alternately controls a light source to be in bright and dark fields within a frame, allowing light valves to switch states during dark field intervals, reducing switching speed and improving precision by using a control unit to manage pulse width and amplitude, and employing geometric series for bright field durations and brightness values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light valve switching speed is increased to achieve precise grayscale control, then modulation precision is improved, but manufacturing difficulty increases and control becomes more complex
Solution Approach 1:
The light valve completes its switching action during the dark field interval before the bright field illumination begins. This preliminary switching ensures the light valve reaches its stable state (01 or 03) before light illumination, eliminating switching oscillations during the measurement period and enabling precise grayscale control without requiring extremely fast switching speeds.
Solution Approach 2:
The system uses periodic bright field and dark field intervals within each frame. The dark field intervals provide dedicated time for light valve switching, while bright field intervals are used for illumination and measurement. This periodic alternation separates the switching function from the measurement function, allowing precise modulation while reducing manufacturing requirements.
2Measurement precision
If light valve switching speed is increased to reduce staying time errors, then time precision is improved, but device complexity increases
Solution Approach 1:
The light valve switching is completed in advance during the dark field interval, ensuring the valve reaches its final state before bright field illumination begins. This eliminates the need for extremely fast switching during the measurement period, reducing time precision requirements and simplifying device design while maintaining accurate grayscale control.
3Ease of manufacture
If light valve switching speed is reduced to simplify manufacturing, then ease of manufacture is improved, but modulation precision deteriorates
Solution Approach 1:
The light valve completes switching during the dark field interval before illumination begins. This preliminary action allows slower switching speeds to be used without compromising modulation precision, as the switching occurs outside the measurement period. The light valve reaches its stable state in advance, ensuring accurate grayscale control during bright field illumination.
Solution Approach 2:
The periodic alternation between dark field (for switching) and bright field (for measurement) intervals allows the system to use slower light valve switching speeds. The dark field provides sufficient time for switching without affecting the measurement precision during bright field intervals, thereby simplifying manufacturing while maintaining modulation accuracy.
4Measurement precision
If light valve switching speed is increased to maintain grayscale accuracy, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The light valve switching is performed in advance during the dark field interval, separate from the bright field measurement period. This preliminary switching allows the full switching time to be utilized without encroaching on the measurement time, maintaining grayscale accuracy while minimizing the impact on overall frame time and reducing time loss.
Data Source
AI summary
A display control system and a display device. The display control system (1) comprises a control unit for controlling a light source (2) to be in a bright field and a dark field alternately in the same frame of data, and controlling the status switching of a light valve of a spatial light modulator (3) to be within the time of the dark field of the light source. The display device comprises the display control system (1). The control unit controls the bright field and the dark field of the light source, so that the light valve of the spatial light modulator (3) has a relatively long switching time, thereby increasing the switching speed of the light valve, reducing the difficulty for manufacturing the spatial light modulator (3), and improving the accuracy for the spatial light modulator (3) to modulate the light source.