Liquid Crystal Projector Optical Shift Resolution Control
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Solution Overview
Problem
In liquid crystal projectors, increasing the number of pixel positions to enhance image resolution leads to a decrease in brightness due to the increased optical response of the liquid crystal panel.
Innovation Solution
A liquid crystal projector system comprising three liquid crystal panels generating modulated images of different colors, with an optical shift element and control circuit to adjust the emission optical path and control the panels' resolutions, allowing the resolution of at least one modulated image to be lower than another, thereby alleviating the optical response requirement and maintaining brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixel positions is increased to enhance image resolution, then the image resolution is improved, but the brightness decreases due to increased optical response requirements
Solution Approach 1:
The image is divided into multiple color components (red, green, blue) that are processed separately by different liquid crystal panels. Each panel handles a specific color channel, allowing independent optimization of resolution and brightness for each color component. The green channel is processed at high resolution while red and blue channels are processed at lower resolution, and the results are combined to form the final high-resolution image.
Solution Approach 2:
Different resolution levels are applied to different color channels based on their specific characteristics. The green liquid crystal panel operates at high resolution (first resolution level) while the red and blue panels operate at lower resolution levels (second resolution level). This local differentiation allows the system to achieve high overall image resolution while maintaining brightness by reducing the optical response burden on specific color channels.
2Measurement precision
If the optical response of the liquid crystal panel is increased to support more pixel positions, then the resolution is improved, but the brightness decreases
Solution Approach 1:
The optical response burden is segmented across multiple liquid crystal panels, each handling a specific color channel. By dividing the resolution requirements among three panels (red, green, blue) with different resolution levels, the optical response demand on each individual panel is reduced compared to requiring all panels to operate at maximum resolution simultaneously.
Solution Approach 2:
Different optical response requirements are assigned to different color channels. The green channel, which has higher visibility and perceived importance, receives high optical response capability (first resolution level). The red and blue channels, which are less critical for perceived resolution, operate at lower optical response levels (second resolution level). This local optimization reduces overall energy consumption while maintaining perceived image quality.
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 allows for a high-resolution and bright display image by managing the optical response of the panels, specifically by reducing the resolution of red and blue images relative to the green image, thus suppressing brightness decrease.
Implementation Method 1
an optical shift element configured to shift an emission optical path of a synthesized image by the synthesizing unit
Implementation Method 2
a first liquid crystal panel configured to generate a first modulated image of first color light, a second liquid crystal panel configured to generate a second modulated image of second color light having a wavelength shorter than that of the first color light
Data Source
AI summary
A liquid crystal projector includes a red liquid crystal panel, a green liquid crystal panel, a blue liquid crystal panel, a green liquid crystal panel, an optical shift element configured to shift an emission optical path of a synthesized image of each liquid crystal panel, and a control circuit configured to control these. The control circuit controls the optical shift element to set a projection position to a projection position (A) in a subframe f1 and to a projection position (B) in a subframe f2. The control circuit causes a resolution of the liquid crystal panel expressed in the subframes f1 and f2 to be lower than the resolution of the liquid crystal panel expressed in the subframes f1 and f2.