CN1877440A - Rear projection display device - Google Patents
Rear projection display device Download PDFInfo
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- CN1877440A CN1877440A CN 200510075194 CN200510075194A CN1877440A CN 1877440 A CN1877440 A CN 1877440A CN 200510075194 CN200510075194 CN 200510075194 CN 200510075194 A CN200510075194 A CN 200510075194A CN 1877440 A CN1877440 A CN 1877440A
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- space
- base
- camera lens
- display apparatus
- rear projection
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Abstract
Disclosed is a back projection display device which comprises a foundation, a separating board, a screen frame and a light machine engine. The separating board is installed inside the foundation for separating it into system space and lens adjusting space; the system space and the lens adjusting space are exposed out via the front side opening on the foundation; a light machine engine is installed in the system space, and the projection lens on the light machine engine is projected out of the lens adjusting space; the screen frame is installed on the foundation and inside the frame is equipped with a display screen, the projection lens focal distance can be adjusted in the lens adjusting space and the projection effects can be displayed on the screen.
Description
Technical field
The present invention relates to a kind of rear projection display apparatus, and particularly relates to a kind of rear projection display apparatus that is easy to adjust the focal length of projection lens.
Background technology
Known rear projection display apparatus is applied to the occasion that large scales such as domestic TV, family movie institute show more.Figure 1 shows that the synoptic diagram of known a kind of rear projection display apparatus, it comprises that mainly preceding frame 10, display screen 11, base 12 and the back of the body cover 14.Wherein, display screen 11 is arranged in the preceding frame 10, and is positioned at the top of base 12, then is provided with electronic components such as optical machine engine 16, circuit board, power supply unit in the base 12.In addition, optical machine engine 16 comprises projection lens 17, and the back of the body cover 14 inside and is provided with catoptron 18, and it is positioned at the rear side of preceding frame 10.
The image-forming principle of rear projection display apparatus, be to produce light beam 20 with the picture information of including by the optical machine engine in the base 12 16, and after 17 focusing of light beam 20 process projection lens, can be projected on the catoptron 18, reflex to display screen 11 and imaging via catoptron 18 again.In more detail, be projeced into the image clear focal length that depends on projection lens 17 whether on the display screen 11, therefore before rear projection display apparatus dispatches from the factory, need to adjust the focal length of projection lens 17, the light beam 20 that is cast out can be focused on the display screen 11 exactly with manual type.
Please refer to Fig. 2, it is depicted as the front view of the rear projection display apparatus of Fig. 1.At present the projection lens 17 in the rear projection display apparatus (because of at red, blue, green three kinds of colors, and three projection lens 17 being arranged) is arranged at the intersection of preceding frame 10 and base 12.Therefore, when finding that when test-run a machine image can't be projected to display screen 11 exactly, preceding frame 10 must be removed earlier with display screen 11, to adjust the focal length of projection lens 17.Afterwards, more preceding frame 10 and display screen 11 assemblings are got on,, therefore, tend to waste many manpowers on the step that repeats above-mentioned dismounting, assembling, test-run a machine, also can prolong and produce required man-hour to carry out test-run a machine.
In addition, other has a kind of rear projection display apparatus is that the back of the body in the display device back covers 14 places perforate is set, allow operating personnel thus tapping adjust the focal length of projection lens 17.Yet, this mode need have two operating personnel simultaneously, and a people adjusts the focal length of projection lens 17 in the back, and another person looks in front then whether the shown image that comes out of display screen 11 is clear, therefore not only personnel comparatively bother on cooperating, and also can cause the waste on the manpower.
Summary of the invention
In view of this, purpose of the present invention just provides a kind of rear projection display apparatus, and it mainly comprises base, screen frame, back of the body lid, dividing plate, system element and removable panel (detachable panel).Wherein, base has front openings, and screen frame is arranged on the base, and has the demonstration opening in the screen frame, to expose display screen.In addition, back of the body lid is arranged on the base, and is connected in a side of screen frame, and dividing plate is arranged in the base, adjusts the space to be separated out system space and camera lens in base.Wherein, camera lens is adjusted the space between system space and screen frame, and outside system space can be exposed to by front openings with camera lens adjustment space, and dividing plate has at least one camera lens and sets up the hole.In addition, system element is arranged in the system space of base, and wherein system element comprises the optical machine engine with projection lens, and the camera lens that this projection lens is positioned at dividing plate sets up on the hole, and protrudes from the camera lens adjustment space.Removable panel is arranged at the front openings place of base, adjusts the space with sealing system space and camera lens.
In preferred embodiment of the present invention, the said system element for example also comprises circuit board and at least one iconoscope, and wherein iconoscope is electrically connected with circuit board.
In preferred embodiment of the present invention, the said system element for example also comprises loudspeaker, and it is electrically connected to circuit board.
In preferred embodiment of the present invention, above-mentioned removable panel and display screen for example are the same sides that is positioned at base.
In preferred embodiment of the present invention, above-mentioned rear projection display apparatus for example also comprises the optical frames group, and it is arranged in the back of the body lid.
The present invention sets up camera lens and adjusts the space in original base in rear projection display apparatus, make operating personnel can directly adjust the focal length of projection lens in camera lens is adjusted the space.Thus, can avoid step such as dismounting, assembling, test-run a machine repeatedly, or the waste on the manpower, and then enhance productivity.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Figure 1 shows that the synoptic diagram of known a kind of rear projection display apparatus.
Figure 2 shows that the front view of the rear projection display apparatus of Fig. 1.
Fig. 3 A and 3B are depicted as the stereographic map and the front view thereof of a kind of rear projection display apparatus of preferred embodiment of the present invention.
The main element description of symbols
10: preceding frame
11: display screen
12: base
14: back of the body lid
16: optical machine engine
17: projection lens
18: catoptron
20: light beam
30: rear projection display apparatus
32: base
322: dividing plate
3222: camera lens sets up the hole
324: front openings
326: system space
328: camera lens is adjusted the space
34: screen frame
342: show opening
344: display screen
36: back of the body lid
38: removable panel
40: optical machine engine
42: projection lens
Embodiment
Please refer to Fig. 3 A and 3B, it is depicted as the stereographic map and the front view thereof of a kind of rear projection display apparatus of preferred embodiment of the present invention.Rear projection display apparatus 30 consists predominantly of: base 32, screen frame 34, the back of the body cover 36, dividing plate 322, optical machine engine 40, projection lens 42 and removable panel 38.Wherein, a side of base 32 is offered front openings 324, and screen frame 34 is arranged on the base 32, and for example is to be positioned at a side identical with front openings 324.Has the opening 342 of demonstration in the screen frame 34, to expose display screen 344 by demonstration opening 342.In addition, the back of the body covers 36 and is arranged on the base 32, and is connected in the rear side of screen frame 34, and wherein the back of the body covers and is provided with optical frames group (not shown) in 36, and it for example comprises optical mirror slips such as catoptron.
Referring again to Fig. 3 A and 3B, dividing plate 322 is arranged in the base 32, to adjust space 328 with being divided into system space 326 in the base 32 with camera lens.Outside this system space 326 can be exposed to by front openings 324 with camera lens adjustment space 328, and camera lens adjustment space 328 is between system space 326 and screen frame 34.In addition, dividing plate 322 is provided with camera lens and sets up hole 3222, and projection lens 42 is positioned at this camera lens and sets up on the hole 3222, and protrudes from the camera lens adjustment space 328.
System element is arranged within the system space 326 of base 32, and it mainly includes the relevant electronic component of optical machine engine 40 and some, for example: circuit board and the iconoscope that is electrically connected with it, loudspeaker etc.This optical machine engine 40 mainly is the light beam that has the picture information of including in order to generation, and this light beam can be incident in the back of the body and cover 36 interior optical frames groups earlier after projection lens 42 focus on thus again, afterwards, images on the display screen 344 through optical frames group thus again.
Number that it should be noted that projection lens 42 of the present invention can be decided according to the demand of different system, and the present invention seldom limits for the number of projection lens 42.In this embodiment, the number of projection lens 42 for example is three, with the light beam (as red, blue, green) that projects three kinds of different colours respectively.When the focal length of projection lens 42 not to the time, the light beam that is projected on the display screen 344 just can't focus on, and will make that the image blurring that be projected is unclear.At this moment, can make that the light beam that projects on the display screen 344 is focused on, to improve the sharpness of the image that is produced on the display screen 344 by adjusting the focal length of this projection lens 42.
In the present embodiment, projection lens 42 is that the camera lens that is positioned at dividing plate 322 sets up on the hole 3222, and protrudes from the camera lens adjustment space 328.Thus, when operating personnel need adjust the focal length of this projection lens 42, can direct front openings 324 enter in the camera lens adjustment space 328 by base 32, adjust the focal length of projection lens 42, and can whether meet the requirements by the adjusted imaging results of focal length of observing projection lens 42 in the display screen 344 in real time.
In addition, removable panel 38 is arranged at front openings 324 places of base 32, and this removable this system space 326 of panel 38 sealings is adjusted space 328 with camera lens at ordinary times, enters in the system element to prevent dust or steam, and influences its normal operation.When needs are adjusted the focal length of projection lens 42, or when wanting the maintenance system element, then can be with it by disassembling on the base 32, carrying out the adjustment of projection lens 42 focal lengths, or carry out the maintenance of inner member.
In sum, in rear projection display apparatus of the present invention, utilize dividing plate 322 to be separated out camera lens in base 32 and adjust space 328, projection lens 42 is inserted into camera lens and adjusts in the space 328.Thus, promptly the personnel of being convenient to operation can directly adjust the focal length that projection lens 42 is directly adjusted in space 328 from the camera lens of rear projection display apparatus front end, but and the adjusted projection situation of Real Time Observation focal length.Therefore, the present invention can effectively simplify steps such as assembling and test-run a machine, with the shortening production time, and can effectively reduce human cost.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any one of ordinary skill in the art, without departing from the spirit and scope of the present invention; when can doing a little change and improvement, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (5)
1. rear projection display apparatus is characterized in that comprising:
Base has front openings;
Screen frame is arranged on this base, has the demonstration opening in this screen frame, to expose display screen;
Back of the body lid is arranged on this base, and is connected in a side of this screen frame;
Dividing plate, be arranged in this base, adjust the space in this base, to be separated out system space and camera lens, this camera lens is adjusted the space between this system space and this screen frame, and this system space and this camera lens are adjusted outside the space can be exposed to by this front openings, and this dividing plate has at least, and a camera lens sets up the hole;
System element is arranged in this system space of this base, and this system element comprises the optical machine engine with projection lens, and this camera lens that this projection lens is positioned at this dividing plate sets up on the hole, and protrudes from this camera lens adjustment space; And
Removable panel (detachable panel) is arranged at this front openings place of this base, adjusts the space to seal this system space and this camera lens.
2. rear projection display apparatus according to claim 1 is characterized in that this system element also comprises:
Circuit board; And
At least one iconoscope is electrically connected to this circuit board.
3. rear projection display apparatus according to claim 1 is characterized in that this system element also comprises loudspeaker, and it is electrically connected to this circuit board.
4. rear projection display apparatus according to claim 1 is characterized in that this removable panel and this display screen are positioned at the same side of this base.
5. rear projection display apparatus according to claim 1 is characterized in that also comprising the optical frames group, and it is arranged in this back of the body lid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510075194 CN1877440A (en) | 2005-06-10 | 2005-06-10 | Rear projection display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510075194 CN1877440A (en) | 2005-06-10 | 2005-06-10 | Rear projection display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1877440A true CN1877440A (en) | 2006-12-13 |
Family
ID=37509911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510075194 Pending CN1877440A (en) | 2005-06-10 | 2005-06-10 | Rear projection display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1877440A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129156B (en) * | 2010-01-14 | 2012-07-25 | 台达电子工业股份有限公司 | Shell cover structure and optical device with same |
| US8690361B2 (en) | 2010-01-11 | 2014-04-08 | Delta Electronics, Inc. | Case structure and optical device having such case structure |
-
2005
- 2005-06-10 CN CN 200510075194 patent/CN1877440A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8690361B2 (en) | 2010-01-11 | 2014-04-08 | Delta Electronics, Inc. | Case structure and optical device having such case structure |
| CN102129156B (en) * | 2010-01-14 | 2012-07-25 | 台达电子工业股份有限公司 | Shell cover structure and optical device with same |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |