CN1301112A - Back projecting display with adjustable image picture size and its method - Google Patents
Back projecting display with adjustable image picture size and its method Download PDFInfo
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- CN1301112A CN1301112A CN 99124736 CN99124736A CN1301112A CN 1301112 A CN1301112 A CN 1301112A CN 99124736 CN99124736 CN 99124736 CN 99124736 A CN99124736 A CN 99124736A CN 1301112 A CN1301112 A CN 1301112A
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Abstract
A back projecting display with adjustable image picture sizes is composed of casing, display screen, projecting display module, control module and at least one detector. SAid projecting display module consists of image picture generator and a projection lens set. When control module receives a focal variation signal, it can change the focal distance of projection lens set until the boundary of image picture is detected by detector.
Description
The present invention refers to a kind of rear projection display apparatus and method of adjustment thereof of adjustable image picture size especially relevant for a kind of rear projection display apparatus (rear projector).
When the image analytic degree of known rear projection display apparatus (resolution) changed along with the derived digital signal difference, the image frame size can be along with change.Please refer to Fig. 1, Fig. 1 is the schematic diagram of the image frame size of different resolutions.Common resolution has SVGA (800*600), XGA (1024*768), and SXGA (1280*1024).Wherein the image frame with SVGA is a minimum, and the image frame as if meet the display screen size from SXGA when changing into SVGA, can obtain an image frame less than display screen.At this moment just need strengthen image frame so that the size of image frame meets the size of display screen.Adjusting the image frame size traditionally is the mode of utilizing numeral to adjust, the pixel points of picture is increased and utilize interpolating method to fill the picture element of these increases to strengthen picture dimension, but so easily cause the situation of picture image distortion to produce, and the present invention utilizes the method for optics adjustment directly image to be amplified, and therefore can reduce the generation of the problems referred to above.
Therefore, main purpose of the present invention is to provide a kind of rear projection display apparatus of adjustable image picture size and method thereof to address the above problem.
A kind of back projection (rear projector) display unit provided by the invention with adjustable image picture size, it includes: a housing; One display screen, the front side that is arranged at this housing are used for the show image picture; One Projection Display module, be arranged in this housing, and image frame is shown on this display screen in the mode of this display screen back projection certainly, this Projection Display module includes: an image frame generator, and the signal of video signal that is used for receiving is converted into the image frame of a corresponding resolution; And a projection lens group, be used for this image frame is projected on this display screen; One control module is used for controlling the operation of this Projection Display module, can begin to change the focal length of this projection lens group when this control module receives a zoom signal, to adjust the size of this image frame; And at least one detector, be arranged at a precalculated position on this display screen detecting this image frame, and be electrically connected on this control module; Wherein when this control module received this zoom signal, the focal length that can continue to change this projection lens group detected up to this detector till the edge of this image frame to adjust the size of this image frame.
Brief Description Of Drawings:
Fig. 1 is the schematic diagram of the image frame size of known different resolutions;
Fig. 2 is the outer schematic diagram of looking of rear projection display apparatus of the present invention;
Fig. 3 is the side cross-sectional schematic of Fig. 2 rear projection display apparatus;
Fig. 4 is the functional block diagram of Fig. 2 rear projection display apparatus;
Fig. 5 is the operational flowchart of Fig. 2 rear projection display apparatus;
Fig. 6 is the outer schematic diagram of looking of another embodiment of rear projection display apparatus of the present invention.
Please refer to Fig. 2 to Fig. 4.Fig. 2 is the outer schematic diagram of looking of rear projection display apparatus 30 of the present invention.Fig. 3 is the side cross-sectional schematic of Fig. 2 rear projection display apparatus 30.Fig. 4 is the functional-block diagram of Fig. 2 rear projection display apparatus 30.The present invention is a kind of rear projection display apparatus 30 (rear projector) of adjustable image picture size, it includes a housing 32, one square display screen 34 is arranged at the front side of housing 32 with the show image picture, one screen display (On Screen Display, OSD) module 36, one Projection Display module 38 is arranged in the housing 32, one control module 40 is used for controlling the operation of Projection Display module 38, and four photodetectors 42 (photo detector) are arranged at respectively near four corners of square display screen 34 detecting this image frame, and are electrically connected on control module 40.Projection Display module 38 includes an image frame generator 44, is converted into the image frame of a corresponding resolution with the signal of video signal that will receive, and a projection lens group 46 is to be projected to this image frame on the display screen 34.Change the resolution of signal of video signal in the OSD picture that the user can be produced by OSD module 36.
When the resolution of the signal of video signal that image frame generator 44 is received changes to some extent, can produce a zoom signal to control module 40, when control module 40 receives this zoom signal, this image frame generator 44 of control is converted into the image frame that an edge part brightness strengthens with the signal of video signal that receives earlier, and the lasting focal length that changes projection lens group 46, wherein the focal length of projection lens group 46 can be adjusted to minimum enlargement ratio earlier so that this image frame dwindles, then adjust the focal length of projection lens group 46 more gradually so that this image frame becomes greatly gradually, detect up to photodetector 42 till the edge of this image frame brightness enhancing.
Please refer to Fig. 5, Fig. 5 is operating process Figure 50 of Fig. 2 rear projection display apparatus 30.
Step 52: beginning.
Step 54: change resolution.
Step 56: when the resolution of the signal of video signal that image frame generator 44 receives changes to some extent, produce a zoom signal to control module 40.
Step 58: image frame generator 44 is converted into the image frame that an edge part brightness strengthens with the signal of video signal that receives.
Step 60: when control module 40 received this zoom signal, the focal length that can adjust earlier projection lens group 46 to minimum so that this image frame dwindled.
Step 62: then adjust the focal length of projection lens group 46 more gradually so that this image frame becomes big gradually.
Step 64: whether four photodetectors 42 detect till the edge of this image frame brightness enhancing simultaneously.If then jump to step 68.
Step 66: can show on this display screen that an error messages is to inform the situation of this image frame generation deflection of user.
Step 68: finish.
Here design makes image frame earlier reduced, and then is exaggerated, and becomes big or diminishes no matter can guarantee resolution like this, and image frame can be adjusted to the size of display screen 34.Under the normal condition, when image frame was exaggerated, as long as there is a photodetector to detect the edge that image frame brightness strengthens, then other photodetector that is positioned at the opposite position of this photodetector can detect the edge that image frame brightness strengthens simultaneously.And a deflection is arranged or be not when being positioned at centre when image frame, to not be that four photodetectors 42 all detect the edge that image frame brightness strengthens simultaneously, design at this moment be as long as a photodetector 42 detects the focal length that just stops to adjust projection lens group 46.And when this image frame deflection, just need or give and repair with manual adjustment.
Please refer to Fig. 6, Fig. 6 is the outer schematic diagram of looking of another embodiment of the present invention rear projection display apparatus 90.Be arranged at mid portion near square display screen 94 4 limits respectively with four detectors 92 of rear projection display apparatus 90 just of not existing together of a last embodiment, institute produces effect all the same.
Compare with known rear projection display apparatus, rear projection display apparatus 30 of the present invention, 90 methods with optical detection adjust, utilize the focal length of adjusting projection lens group 46, can be adjusted into display screen 34 to the image frame of various resolutions, 94 size, and do not have the problem of known technology picture image distortion.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (12)
1. back projection (rear projector) display unit with adjustable image picture size is characterized in that this rear projection display apparatus includes:
One housing;
One display screen, the front side that is arranged at this housing are used for the show image picture;
One Projection Display module is arranged in this housing, and image frame is shown on this display screen in the mode of this display screen back projection certainly, and this Projection Display module includes:
One image frame generator, the signal of video signal that is used for receiving is converted into the image frame of a corresponding resolution; And
One projection lens group is used for this image frame is projected on this display screen;
One control module is used for controlling the operation of this Projection Display module, can begin to change the focal length of this projection lens group when this control module receives a zoom signal, to adjust the size of this image frame; And
At least one detector is arranged at a precalculated position on this display screen detecting this image frame, and is electrically connected on this control module;
Wherein when this control module received this zoom signal, the focal length that can continue to change this projection lens group detected up to this detector till the edge of this image frame to adjust the size of this image frame.
2. rear projection display apparatus as claimed in claim 1 is characterized in that this detector is photodetector (photo detector) and the marginal portion that is arranged at close this display screen.
3. rear projection display apparatus as claimed in claim 1 it is characterized in that this display screen is a square display screen, and this precalculated position is meant any corner of this square display screen.
4. rear projection display apparatus as claimed in claim 1 it is characterized in that this display screen is a square display screen, and this precalculated position is meant the mid portion on this arbitrary limit of square display screen.
5. rear projection display apparatus as claimed in claim 1, it is characterized in that this rear projection display apparatus includes a plurality of detectors, these a plurality of detectors are the edges that are arranged at this display screen, and at least two opposite positions that are arranged on this edge wherein, when these a plurality of detectors detect the edge of this image frame simultaneously, beginning stops to adjust the size of this image frame, otherwise can show on this display screen that an error messages is to inform the situation of this image frame generation deflection of user.
6. rear projection display apparatus as claimed in claim 1, it is characterized in that when this control module receives this zoom signal, this image frame generator of control is converted into the image frame that an edge part brightness strengthens with the signal of video signal that receives earlier, and the focal length that continues to change this projection lens group detects up to this detector till the edge of this image frame brightness enhancing to adjust the size of this image frame.
7. rear projection display apparatus as claimed in claim 1, when the resolution that it is characterized in that the signal of video signal that this image frame generator is received changes to some extent, can produce this zoom signal to this control module to change the focal length of this projection lens group.
8. rear projection display apparatus as claimed in claim 1, it is characterized in that and comprise a screen display (On Screen Display, OSD) module changes the resolution of this signal of video signal, to produce this zoom signal in the OSD picture that the user can be produced by this OSD module.
9. the method that can adjust the image frame size of a back projection (rear projector) display unit, this rear projection display apparatus includes a housing, one display screen, the front side that is arranged at this housing is with the show image picture, one image frame generator, be arranged at the signal of video signal that is used for to receive in this housing and be converted into the image frame of a corresponding resolution, one projection lens group, be arranged at and be used in this housing image frame is shown on this display screen in the mode of this display screen back projection certainly, and at least one detector, be arranged at precalculated position on this display screen to detect this image frame;
It is characterized in that this method includes:
When the resolution of the received signal of video signal of this image frame generator changes to some extent, produce a zoom signal;
Begin to change the focal length of this projection lens group according to this zoom signal, to continue to adjust the size of this image frame; And
When this detector detects the edge of this image frame, promptly stop to change the focal length of this projection lens group.
10. method as claimed in claim 9, it is characterized in that when this image frame generator produces this zoom signal, and the signal of video signal that receives can be converted into the image frame that an edge part brightness strengthens, the focal length of this projection lens group and sustainable change detect up to this detector till the edge of this image frame brightness enhancing to adjust the size of this image frame.
11. method as claimed in claim 10, the focal length that it is characterized in that this projection lens group can be adjusted earlier this image frame is dwindled, then adjust the focal length of this projection lens group more gradually so that this image frame becomes greatly gradually, detect up to this detector till the edge of this image frame brightness enhancing.
12. method as claimed in claim 10, it is characterized in that this rear projection display apparatus includes a plurality of detectors, wherein these a plurality of detectors are the marginal portions that are positioned at this display screen, when these a plurality of detectors detect the edge of this image frame simultaneously, beginning stops to adjust the size of this image frame, otherwise can show on this display screen that an error messages is to inform the situation of this image frame generation deflection of user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99124736 CN1254964C (en) | 1999-12-17 | 1999-12-17 | Back projecting display with adjustable image picture size and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99124736 CN1254964C (en) | 1999-12-17 | 1999-12-17 | Back projecting display with adjustable image picture size and its method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1301112A true CN1301112A (en) | 2001-06-27 |
| CN1254964C CN1254964C (en) | 2006-05-03 |
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ID=5283596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99124736 Expired - Fee Related CN1254964C (en) | 1999-12-17 | 1999-12-17 | Back projecting display with adjustable image picture size and its method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1254964C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411753A (en) * | 2013-07-19 | 2013-11-27 | 苏州佳世达电通有限公司 | Image detecting system of optical module |
| CN103853510A (en) * | 2012-11-30 | 2014-06-11 | 上海闻泰电子科技有限公司 | Multi-screen projection display control system and method of handheld electronic device |
-
1999
- 1999-12-17 CN CN 99124736 patent/CN1254964C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103853510A (en) * | 2012-11-30 | 2014-06-11 | 上海闻泰电子科技有限公司 | Multi-screen projection display control system and method of handheld electronic device |
| CN103853510B (en) * | 2012-11-30 | 2017-07-28 | 上海闻泰电子科技有限公司 | The multi-screen Projection Display control system and method for a kind of hand-hold electronic equipments |
| CN103411753A (en) * | 2013-07-19 | 2013-11-27 | 苏州佳世达电通有限公司 | Image detecting system of optical module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1254964C (en) | 2006-05-03 |
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