Projector Pixel Shifting for Resolution and Refresh Rate Trade-off
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Solution Overview
Problem
Current projectors cannot simultaneously meet the demands of high resolution and high response speed, which are critical for electronic sports applications.
Innovation Solution
A projector system that includes a light source, a light valve, a projection lens, and a processor, where the processor generates control signals based on the refresh rate of the input image signal to adjust the image resolution, performing pixel shifting operations when the refresh rate is below a threshold to achieve higher resolutions without increasing the light valve's specification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the light valve resolution specification is increased to achieve high resolution imaging, then the imaging resolution is improved, but the response speed deteriorates
Solution Approach 1:
The patent applies dynamics by making the light valve perform pixel shifting operations dynamically based on the refresh rate of the input image signal. When the refresh rate is below a threshold, the light valve shifts pixels to synthesize higher resolution images, and when the refresh rate is above the threshold, it displays images at native resolution without shifting. This dynamic adaptation resolves the contradiction between resolution and response speed.
Solution Approach 2:
The patent uses pixel shifting in the spatial dimension to achieve higher resolution. By shifting the light valve's pixel output position and combining multiple shifted images, the system synthesizes higher resolution images without physically increasing the light valve's pixel density, thus maintaining fast response speed while achieving high resolution.
2Manufacturing precision
If the light valve performs pixel shifting operation to achieve higher resolution, then the imaging resolution is improved, but the device complexity increases
Solution Approach 1:
The patent makes the light valve multi-functional by enabling it to perform both native resolution display and pixel shifting operations. The same light valve hardware is used for both functions, controlled dynamically based on refresh rate requirements, eliminating the need for separate hardware systems for different resolution modes.
Solution Approach 2:
The patent changes the operational parameters of the light valve dynamically. Based on the refresh rate parameter, the system adjusts whether the light valve operates in native display mode or pixel shifting mode. This parameter-based control simplifies the system by using a single light valve with adjustable operating modes rather than multiple fixed-function devices.
3Adaptability or versatility
If the projector supports multiple projection modes with different resolutions, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent implements dynamic mode switching based on the refresh rate of the input signal. The processor automatically determines whether to enable pixel shifting mode or native display mode, providing adaptability to different application scenarios (e.g., electronic sports vs. high-definition video) without requiring manual configuration or complex user intervention.
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
Enables high-definition and high-refresh rate imaging by automatically switching between modes based on the refresh rate, allowing a single projector to meet diverse user demands without upgrading the light valve's resolution specifications.
Implementation Method 1
The light valve is provided on a transmission path of the illumination beam and configured to convert the illumination beam into an image beam according to a control signal
Implementation Method 2
The projection lens is provided on a transmission path of the image beam, and configured to project the image beam to the outside of the projector to form an imaged image
Data Source
AI summary
A projector and a projection method are provided. The projector is coupled to a display card and includes a light source, a light valve, a projection lens, and a processor. The light source provides an illumination beam. The light valve converts the illumination beam into an image beam. The projection lens projects the image beam to the outside of the projector to form an imaged image. The processor receives an input image signal from the display card, and generates a control signal corresponding to the input image signal according to a refresh rate of the input image signal. When the refresh rate is greater than a threshold, the imaged image has a first resolution. When the refresh rate is less than the threshold, the light valve performs a pixel shifting operation, so that the imaged image has a second resolution. The first resolution is less than the second resolution.