Projector Light Attenuation Control for Stereoscopic Image Response Speed
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Solution Overview
Problem
Projectors with liquid crystal display panels experience decreased response speed at low temperatures, leading to afterimages and crosstalk, especially when displaying stereoscopic images, due to reduced temperature and response speed of the modulation unit.
Innovation Solution
A projector configuration that includes a light source, a modulation unit, a light attenuation rate setting unit, and a light adjustment unit, where the light attenuation rate is set to a higher minimum value for stereoscopic image data to maintain the modulation unit's temperature and response speed by securing the intensity of incident light, preventing the light intensity from dropping to zero, and using a solid light source with minimal heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light attenuation rate is set to a low minimum value for stereoscopic images, then the image brightness can be optimized, but the modulation unit temperature drops below the optimal range causing decreased response speed
Solution Approach 1:
The patent applies parameter changes by setting different minimum light attenuation rate values based on the image type. For stereoscopic images, a higher minimum attenuation rate is set to maintain modulation unit temperature and response speed, while for non-stereoscopic images, a lower minimum rate allows for better brightness optimization. This conditional parameter adjustment resolves the contradiction between brightness and response speed maintenance.
2Loss of energy
If the light intensity is reduced to zero for non-stereoscopic images, then energy efficiency is improved, but the modulation unit cannot maintain optimal temperature
Solution Approach 1:
The patent applies local quality by differentiating the light attenuation rate settings based on image type characteristics. The system recognizes when stereoscopic images are displayed and applies a higher minimum attenuation rate to maintain temperature, while allowing lower rates for non-stereoscopic images to optimize energy efficiency. This localized differentiation of control parameters resolves the contradiction between energy efficiency and temperature maintenance.
3Device complexity
If a solid light source with low heat generation is used, then the projector structure is simplified, but maintaining modulation unit temperature becomes more difficult
Solution Approach 1:
The patent applies self-service by using the light itself to heat the modulation unit. The light adjustment unit controls the light intensity to ensure sufficient heat generation from the light source to maintain the modulation unit's temperature, eliminating the need for separate heating mechanisms. This self-service approach resolves the contradiction between simplified structure and temperature maintenance.
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 configuration maintains the response speed of the modulation unit, preventing afterimages and crosstalk, and ensures optimal performance even with stereoscopic image display by ensuring the modulation unit's temperature is adequately maintained.
Implementation Method 1
intensity of the incident light of the modulation unit is secured, and thus, the modulation unit is heated by irradiation with light
Data Source
AI summary
A projector that projects an image based on image data, includes alight source, a modulation unit that modulates light which is emitted from the light source, a light attenuation rate setting unit that sets a light attenuation rate based on the image data, and a light adjustment unit that adjusts intensity of incident light of the modulation unit, according to the light attenuation rate which is set by the light attenuation rate setting unit. The light attenuation rate setting unit sets a minimum value of an adjustment range of the light adjustment unit in a case where the image data is stereoscopic image data to a higher value than a minimum value of an adjustment range of the light adjustment unit in a case where the image data is not stereoscopic image data.