CN2586186Y - Large screen rear projector - Google Patents
Large screen rear projector Download PDFInfo
- Publication number
- CN2586186Y CN2586186Y CN 02292284 CN02292284U CN2586186Y CN 2586186 Y CN2586186 Y CN 2586186Y CN 02292284 CN02292284 CN 02292284 CN 02292284 U CN02292284 U CN 02292284U CN 2586186 Y CN2586186 Y CN 2586186Y
- Authority
- CN
- China
- Prior art keywords
- projector
- screen
- base
- angle
- utility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Transforming Electric Information Into Light Information (AREA)
Abstract
The utility model comprises a projector base, a projector housing, a projector, a reflective mirror and a projector screen, wherein, the projector screen is connected with the projector housing. The utility model is characterized in that the projector screen is not perpendicular to the horizontal plane and forms an angle of less than 90 DEG with the horizontal plane, the lower end of the projector housing is connected with the projector base, and the projector is arranged at the bottom of a back projector base in the mode of inclination and formation of a finite angle with the perpendicular direction; the reflective mirror, which is provided with one in number, is fixed on the top of the projector housing in the mode of inclination and formation of a finite angle with the horizontal plane. Under the condition that the height of a back projector is higher than the human body height and an observer can observe with upward view, the utility model can improve the brightness so that the view effect is clearer, besides, the utility model uses only one reflective mirror, so the cost is low. The utility model is suitable for view for lots of people.
Description
Technical field: the utility model belongs to a kind of projector, specifically is a kind of large screen back projection shadow machine.
Background technology: existing back reflection projector screen is vertical with surface level, beholder's sight line angle of visibility in the horizontal direction generally can reach 180 degree, when the height of back reflection projector during a little more than the people or less than the height of human body, observer's sight line is also very big at the angle of visibility of vertical direction, do not influence appreciation effect, but, in the public arena that many people watch, it is very high that projector need put, when the screen height of back reflection projector is higher than human body when very big, observer's sight line is just angled with screen at the visual angle of vertical direction, when angle of visibility during in the 17 degree left and right sides, brightness will decay half, and such appreciation effect will be very poor.Therefore, being not suitable for many people watches.In addition, generally all adopt two with upper reflector in the existing large screen back projection shadow machine, cost is than higher.
Summary of the invention: the purpose of this utility model provides and a kind ofly highly is higher than the human body height in projector, under the situation that the observer must look up, do not change optical path length, projection screen size and projector lens, do not change the angle between audience's sight line and screen, and brightness is improved greatly, thereby make appreciation effect more clear, and only adopt a kind of large screen back projection shadow machine of a catoptron.The utility model comprises projector's base, projector shell, projector, catoptron, projector screen, projector screen links to each other with projector shell, be characterized in: projector screen and surface level out of plumb, one-tenth is less than the angle of 90 degree, the lower end of projector shell is connected on projector's base, projector and vertical direction have a certain degree and tilt to be placed on the bottom of back reflection projector's base, and catoptron has only one, have a certain degree with surface level and tilt to be fixed on the top of projector shell.The utility model highly is higher than the human body height in back reflection projector, under the situation that the observer must look up, not changing optical path length, projection screen size and not changing under the prerequisite of projector lens, do not change the angle between audience's sight line and screen, by adding projector's base and projector screen being tilted, improved brightness greatly, thereby make appreciation effect more clear, and only adopt a catoptron, cost is low, simple in structure, be suitable for many people and watch.
Description of drawings: Fig. 1 is the utility model structural representation
Embodiment: utility model comprises back reflection projector's base 4, back projection shell 3, projector 5, catoptron 2, projector screen 1, projector screen 1 links to each other with projector shell 3, the lower end of projector shell 3 is connected on projector's base 4, the high 1.8-4.1 rice of the front end of projector's base 4, the high 2.4-4.6 rice in rear end, projector screen 1 and surface level out of plumb, become 10-35 ° of angle with vertical direction, projector 5 becomes 60-85 ° of angle lapping tiltedly to be placed on the bottom of projector's base 4 with the baseplane of projector base 4, catoptron 2 has only one, and it becomes 25-60 ° angle tilt to be fixed on the top of projector shell 3 with surface level.
Claims (2)
1, a kind of large screen back projection shadow machine, comprise projector's base, projector shell, projector, catoptron, projector screen, projector screen links to each other with projector shell, it is characterized in that: projector screen becomes the angle less than 90 degree with surface level, the lower end of projector shell is connected on projector's base, projector and vertical direction have a certain degree and tilt to be placed on the bottom of back reflection projector's base, catoptron has only one, has a certain degree with surface level and tilts to be fixed on the top of projector shell.
2, a kind of large screen back projection shadow machine as claimed in claim 1, its feature also is the high 1.8-4.1 rice of the front end of described projector base, the high 2.4-4.6 rice in rear end, angle between the baseplane of projector and projector's base is between 60-85 °, projector screen becomes 10-35 ° of angle with vertical direction, catoptron becomes 25-60 ° of angle with surface level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02292284 CN2586186Y (en) | 2002-12-31 | 2002-12-31 | Large screen rear projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02292284 CN2586186Y (en) | 2002-12-31 | 2002-12-31 | Large screen rear projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2586186Y true CN2586186Y (en) | 2003-11-12 |
Family
ID=33750758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02292284 Expired - Fee Related CN2586186Y (en) | 2002-12-31 | 2002-12-31 | Large screen rear projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2586186Y (en) |
-
2002
- 2002-12-31 CN CN 02292284 patent/CN2586186Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |