Lens shift mechanism and projection video display apparatus
A lens, projection lens technology, applied in projection devices, printing devices, cameras, etc., can solve problems such as increased cost and limited hardware circuits
Inactive Publication Date: 2011-05-04
SANYO ELECTRIC CO LTD
View PDF7 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, in this structure, it is necessary to provide a new light-shielding mechanism and a circuit for processing the detection signal of the optical sensor corresponding to the additional optical sensor, and there is a problem that the cost of the device increases.
In addition, in terms of the layout of the lens shift mechanism, the configuration of the above hardware circuits may be limited
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0022] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same part in the figure or the part corresponding to the same part is attached|subjected with the same code|symbol and will not repeat description.
[0023] figure 1 It is a figure explaining the projection type image display apparatus which concerns on embodiment of this invention.
[0024] Such as figure 1 As shown, the projection-type image display device (hereinafter also referred to as "projector") 1 of this embodiment is a liquid crystal projector that projects an image using a liquid crystal device. Instead, the image is projected (displayed). The projection surface is not limited to a screen, and may be a wall.
[0025] The projector 1 includes a remote control receiving unit 10 that receives an infrared-modulated remote control signal transmitted from a remote controller (short for remote controller) operated by a user, and an input...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention provides a projection shift mechanism and a projection video display apparatus, capable of making a projection lens to reset automatically without additional hardware circuits. A lens shift mechanism includes a projection lens drive unit, a vertical-horizontal limit sensor which detects that a projection lens apparatus reaches a limit in a shift range in vertical and horizontal directions, and a vertically-horizontally central sensor which detects that the projection lens apparatus reaches a central position in the shift range. The vertically-horizontally central sensor has a detection width having a central value at the central position. When a microcomputer automatically returns the projection lens apparatus to the central position within the shift range after a shift operation, the microcomputer shifts the projection lens apparatus in a forward direction directed from a position at a time point when automatic return is started toward the central position, and thereafter shifts the projection lens apparatus again in a backward direction by substantially half the detection width of the vertically-horizontally central sensor.
Description
technical field [0001] The present invention relates to a lens shift mechanism and a projection-type image display device, in particular to a lens shift mechanism and a projection-type image display device with an automatic reset function of the projection lens device. Background technique [0002] In a projector as a projection-type image display device, there is a device that adjusts the position of a projection screen of the projector by shifting a projection lens within a certain range by using a motor or the like. For example, Japanese Unexamined Patent Publication No. 2004-62000 (Patent Document 1) discloses a method for controlling the displacement of a projection lens, that is, at the boundary of the displacement range of the projection lens or a movable member integrally arranged with the projection lens A sensor for detecting that the projection lens or the movable member has reached the boundary portion is arranged near the portion, and when the sensor detects tha...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G03B5/04G03B21/14G03B21/00
CPCG03B5/04G03B21/147
Inventor 藤崎刚吉村太一
Owner SANYO ELECTRIC CO LTD