Spoke Synchronization with Variable Intensity Illuminator
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Solution Overview
Problem
Existing display systems employing spatial light modulators face inefficiencies in pure color display due to the movement of spoke boundaries from spinning color wheels, which are not compatible with lamp-pulsing techniques, leading to reduced pure color efficiency and bit-depth.
Innovation Solution
A spoke synchronization technique that divides the pixel array into sub-arrays, allowing pixels being swept by spoke boundaries to operate differently and utilize mixed light, while other pixels display pure colors, enabling lamp-pulsing during spoke synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a spinning color wheel with transmissive color segments is used to generate selected colors, then color images can be produced using sequential-color techniques, but the boundaries of adjacent color segments are imaged onto the pixel array forming spokes that sweep across the pixel array during spoke time, causing pixels to be illuminated by light of different colors and decreasing pure color efficiency
Solution Approach 1:
The pixel array is divided into multiple sub-arrays, with each sub-array assigned to display a specific pure color. This segmentation allows the system to eliminate spoke interference for each color region by directing corresponding color light only to its designated sub-array, thereby resolving the contradiction between maintaining color generation capability and improving pure color efficiency
Solution Approach 2:
Different regions of the pixel array are assigned different functional qualities - each sub-array is specialized for displaying a specific pure color. This local specialization ensures that pixels only receive and display their designated color during spoke time, eliminating the mixed color illumination problem and improving overall pure color efficiency
2Productivity
If lamp-pulsing techniques are used to increase bit-depth and overall system brightness, then system performance is improved, but lamp-pulsing techniques are not compatible with existing spoke-chasing techniques, creating a technical conflict
Solution Approach 1:
By dividing the pixel array into sub-arrays and assigning each to a specific pure color, the system creates independent display regions that can be controlled separately. This segmentation enables the integration of lamp-pulsing techniques with spoke-chasing, as each sub-array can be synchronized with lamp pulses independently, resolving the compatibility conflict while maintaining improved bit-depth and brightness performance
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 approach enhances pure color efficiency and bit-depth by optimizing pixel operations during spoke movement, allowing for lamp-pulsing and improving overall display system performance.
Implementation Method 1
applying a lamp pulse to the lamp so as to pulse an intensity of the light from the lamp
Implementation Method 2
generating a sequence of color light using a spinning color wheel that comprises a set of color segments
Implementation Method 3
sequentially illuminating an array of individually addressable pixels of a spatial light modulator using the color light
Data Source
AI summary
A spoke synchronization technique allowing for lamp-pulsing synchronizes a spoke based on sub-arrays of a spatial light modulator. The lamp pulsing occurs during the spoke synchronization; and the lamp pulse for pulsing the lamp spans substantially across the entire spoke synchronization time period.