Projector Adjustment Circuit for Optical Path Shift Synchronization
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Solution Overview
Problem
Existing projector technologies experience time lag in changing the state of optical-path shift elements and switching projection images, leading to image quality deterioration due to the inability to instantly change the optical-path shift element states and switch projection images, resulting in a pseudo increase in image resolution that is not effectively maintained.
Innovation Solution
A projector system with an electro-optical panel and an optical-path shift element, where an image signal is supplied to pixels in a predetermined order within unit periods of a frame period, and an adjustment circuit adjusts the response velocity of pixels based on the order of signal supply or pixel position, synchronizing with the optical-path shift element changes to minimize time lag and maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical-path shift element state is changed to increase image resolution, then the resolution is improved, but a time lag occurs between the change of optical-path shift element state and the switch of projection image, deteriorating image quality
Solution Approach 1:
The adjustment circuit performs preliminary action by adjusting the image signal in advance according to the change amount of the optical-path shift element before the projection image is fully switched. This preliminary adjustment compensates for the time lag, ensuring that the pixel transmittance variation is minimized during the transition period, thereby maintaining image quality while achieving high resolution.
Solution Approach 2:
The adjustment circuit uses feedback from the optical-path shift element change amount to dynamically adjust the image signal. By monitoring how much the optical path shifts and applying corresponding compensation to the image signal, the system maintains synchronization between the optical element state and the displayed image, eliminating the quality deterioration caused by time lag.
2Speed
If the state of optical-path shift element is changed instantly, then the response speed is improved, but in reality a certain amount of time is required to change the state, causing time lag
Solution Approach 1:
The system performs preliminary action by adjusting the image signal in advance based on the expected or actual change amount of the optical-path shift element. This compensation happens during the transition period, effectively reducing the perceived time lag without requiring the optical element to change state instantly.
Solution Approach 2:
The adjustment circuit changes parameters of the image signal (such as pixel transmittance values) to compensate for the physical limitations of the optical-path shift element. By modifying the image signal parameters in response to the element's change amount, the system achieves faster effective response despite the inherent time required for the optical element to physically change state.
3Productivity
If the projection image is switched, then the image content is updated, but the variation in pixel transmittance causes image quality deterioration
Solution Approach 1:
Before the projection image is switched, the adjustment circuit performs preliminary adjustment of the image signal based on the change amount of the optical-path shift element. This ensures that when the image switching occurs, the pixel transmittance variation is already compensated, preventing quality deterioration while maintaining fast switching speed.
Solution Approach 2:
The adjustment circuit implements feedback control by continuously monitoring the optical-path shift element change amount and dynamically adjusting the image signal accordingly. This feedback mechanism ensures that image quality is maintained during switching by compensating for transmittance variations in real-time.
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 reduces the variation in pixel transmittance, thereby enhancing the quality of the image recognized by the user by synchronizing pixel response with optical-path shift element changes, effectively suppressing image quality reduction.
Implementation Method 1
an electro-optical panel including a plurality of pixels arrayed therein and configured to emit light from the plurality of pixels to display an image
Implementation Method 2
an optical-path shift element configured to change an optical path of light emitted from the plurality of pixels
Data Source
AI summary
A projector includes: an electro-optical panel including a plurality of pixels; an optical-path shift element configured to change an optical path of light emitted from the plurality of pixels; and an image processing circuit configured to, in a unit period, supply an image signal to the plurality of pixels in an order, the unit period being included in one frame period for displaying an image of one frame indicated by an input image signal, the image signal corresponding to the plurality of pixels and being generated on a basis of the input image signal, in which the image processing circuit includes an adjustment circuit configured to adjust a response velocity of the plurality of pixels when the image displayed by the electro-optical panel is switched, on a basis of an order of supply of the image signal or of a position of a pixel at the electro-optical panel.