Projection Device Vertical Image Frame Brightness
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Solution Overview
Problem
Current projection devices face reduced brightness and resolution when attempting to project vertical image frames due to inefficient utilization of the effective display region, as they often require setting significant portions of the display region to an off-state, leading to a low utilization rate and suboptimal image quality.
Innovation Solution
A projection device design that includes an illumination system, a light valve, and a projection lens, where the optical path of the image beam shifts vertically relative to the reference plane including the optical axis of the projection lens, allowing for direct formation of a vertical image frame without sacrificing brightness and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If portions of the effective display region corresponding to non-predetermined projection region are set to off-state, then the projector can only project image on the predetermined projection region, but the utilization rate of the effective display region is greatly reduced, causing loss in brightness and resolution
Solution Approach 1:
The patent changes the orientation dimension of the projected image from horizontal to vertical. By rotating the projection output 90 degrees, the system can utilize the full effective display region of the DMD chip while achieving vertical projection on elevator doors, thus maintaining brightness and resolution while adapting to the specific application scenario.
2Ease of operation
If portions of the effective display region corresponding to non-predetermined projection region are set to off-state, then the projector can only project image on the predetermined projection region, but the utilization rate of the effective display region is greatly reduced, causing loss in resolution
Solution Approach 1:
The patent changes the orientation dimension of the projected image from horizontal to vertical. By rotating the projection output 90 degrees, the system can utilize the full effective display region of the DMD chip while achieving vertical projection on elevator doors, thus maintaining brightness and resolution while adapting to the specific application scenario.
3Illumination intensity
If the whole effective display region is irradiated by the incident ray, then maximum brightness is achieved, but when portions corresponding to non-predetermined projection region are set to off-state, brightness is lost
Solution Approach 1:
The patent changes the orientation dimension of the projected image from horizontal to vertical. By rotating the projection output 90 degrees, the system can utilize the full effective display region of the DMD chip while achieving vertical projection on elevator doors, thus maintaining brightness and resolution while adapting to the specific application scenario.
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 the projection of vertical image frames with improved display quality by maintaining high utilization of the effective display region, ensuring that only a minimal portion needs to be set to the off-state, thus preserving brightness and resolution.
Implementation Method 1
the light valve is disposed on a transmission path of the illumination beam and is configured to convert the illumination beam to an image beam
Implementation Method 2
the projection lens is disposed on a transmission path of the image beam and is configured to project the image beam out of the projection device to form a vertical image frame
Data Source
Figure 1~2
Figure 3A~3B
Figure 3C~3F
AI summary
A projection device, including an illumination system, a light valve and a projection lens, is provided. The illumination system is used to provide an illumination beam. The light valve is disposed on a transmission path of the illumination beam and is configured to convert the illumination beam to an image beam. The light valve has a long side and a short side, and the short side of the light valve is parallel to a first direction. The illumination beam is incident on an effective display region of the light valve from the short side of the light valve. The projection lens is disposed on a transmission path of the image beam and is configured to project the image beam out of the projection device to form a vertical image frame. A short side of the vertical image frame is parallel to the first direction.