CN2753076Y - Multimedia projector television set - Google Patents
Multimedia projector television set Download PDFInfo
- Publication number
- CN2753076Y CN2753076Y CNU2004200143238U CN200420014323U CN2753076Y CN 2753076 Y CN2753076 Y CN 2753076Y CN U2004200143238 U CNU2004200143238 U CN U2004200143238U CN 200420014323 U CN200420014323 U CN 200420014323U CN 2753076 Y CN2753076 Y CN 2753076Y
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- television set
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Abstract
The utility model relates to a video projection system, which has the technical scheme that the utility model comprises a television receiving unit, a multiple signal interface, a signal exchange unit, a format identification unit, an AD transmission unit, a format transmission unit, a projection display unit and a power supply and microprocessor unit. The utility model has the advantage that the video projection system can carry out adaptive processing to various signals and can scan the signals by lines via output normalization, and the utility model can cause back-stage convergence processing to be simpler and exacter and can increase the show effect of image.
Description
Technical field
The utility model relates to a kind of video terminal system, particularly a kind of CRT projection TV set.
Background technology
Projection TV set, as a kind of large-screen picture display terminal, it is big to have screen size, the characteristics of visual angle broadness.But just because of These characteristics, common TV is low because of its row-field scanning frequency, the inherent defect that adopts interlaced scan mode etc. to bring, and as interline flicker, problem such as large-area flicker and image are coarse seems more outstanding.Along with the development of projection TV digitizing technique, for the projection TV of signal specific input, these problems have obtained solving preferably.Yet, for refuting the video projection system that connects multiple signal, different input signals being addressed the above problem simultaneously, existing projection TV set still can not address these problems.
The utility model content
Technical problem to be solved in the utility model is exactly the shortcoming at above-mentioned prior art, and a kind of employing digital technology is provided, and multiple unlike signal is carried out normalized, to improve the multimedia overhead projector television set of image display effect.
The utility model solves its technical problem, and the technical scheme of employing is: the multimedia overhead projector television set comprises television receiver unit, the multiple signals interface, signal switch unit, format identification unit, AD converting unit, format conversion unit, projection display unit, and power supply and microprocessor unit; The vision signal of described television receiver unit output is connected with the input of signal switch unit; The multiple signals interface is connected with the input of signal switch unit; The output of signal switch unit is connected with signal recognition unit and AD converting unit respectively; The output of AD converting unit is connected with the input of format conversion unit; The output of format conversion unit is connected with projection display unit; Above-mentioned each unit is connected with microprocessor.
The beneficial effects of the utility model are, can carry out self-adaptive processing to multiple input signal, export normalized progressive-scan signal, the back level are assembled handle easier, accurate, have improved the display effect of image.Enlarged the application of projection TV.
Description of drawings
Fig. 1 is the circuit block diagram of embodiment 1;
Fig. 2 is the circuit block diagram of embodiment 2.
Embodiment
The processing of audio signal is same as the prior art, and the technical solution of the utility model does not relate to voicefrequency circuit.Below in conjunction with drawings and Examples, describe the technical solution of the utility model in detail.
See Fig. 1.The multimedia overhead projector television set that this is routine comprises television receiver unit 1, multiple signals interface 2, signal switch unit 3, signal recognition unit 4, AD converting unit 5, format conversion unit 6, projection display unit 7, and power supply and microprocessor unit.Television receiver unit 1 has the repertoire that TV audio frequency and video small-signal is handled; This unit is under microprocessor control, and the selective reception radio television signal is by amplification, decoding processing, to signal switch unit 3 outputting video signals.Signal switch unit 3 can be refuted the analog video signal that connects outside input by multiple signals interface 2, the primary colour signal of the digital video signal of top box of digital machine output and computer output; Signal switch unit 3 is selected input signal under microprocessor control, and selected signal is delivered to signal recognition unit 4 and AD converting unit 5.4 pairs of input signal formats of signal recognition unit are discerned, and recognition result is fed back to microprocessor, and microprocessor is according to the signal format of identification, and the mode of operation of control AD converting unit 5 and form converting unit 6 is to adapt to the conversion of different-format signal.AD converting unit 5 is used for the analog video signal of input is carried out digital conversion.The digital video signal of 6 pairs of inputs of format conversion unit carries out format conversion, exports normalized progressive-scan signal at last.The function of format conversion unit 6 comprises, conversion line by line, format conversion, motion compensation, row frame pull and push, DA conversion, matrix conversion, finally with unified format output simulation primary colour signal, this signal format can be as required, be set to by microprocessor: line frequency 15-48kHz, the progressive-scan signal of frame frequency 50-92Hz.The signal of format conversion unit 6 outputs also comprises capable field sync signal, and exports the level of three projection tubes of RGB (red, green, blue), 6 groups of deflections convergence signals of vertical direction by the algorithm of self.Projection display unit 7 adopts CRT back projection display unit, and this unit receives the RGB primary colour signal and the deflection of format conversion unit 6 outputs and assembles signal, by inter-process, drives three CRT projection tubes, demonstrates image on screen.
The circuit basic functional principle that this is routine, identical with embodiment 1, owing to adopted different integrated circuit (IC) chip, circuit constitutes with embodiment 1 to be distinguished to some extent.The main distinction is that format conversion unit adopts two integrated circuits, finishes format conversion and DA conversion respectively.Circuit block diagram is seen Fig. 2.
The foregoing description only is two kinds of implementations of the present utility model, for the technical staff of the industry, uses basic principle of the present utility model, adopts different circuit formulas, and different implementations can be arranged, and it all belongs to protection range of the present utility model.
Multimedia overhead projector television set of the present utility model, can carry out self-adaptive processing to multiple input signal, export normalized progressive-scan signal, fundamentally overcome the defective of common TV standard, to the vision signal of various different-formats, all can significantly improve the display effect of image.Simultaneously, because the normalization of signal format output makes the convergence processing of CRT projection display unit easier, accurate, further improved the display effect of image.Multimedia TV set of the present utility model can be widely used in need refute the large scale display field that connects multiple signal input.
Claims (6)
1. the multimedia overhead projector television set is characterized in that: comprise television receiver unit (1), multiple signals interface (2), signal switch unit (3), format identification unit (4), AD converting unit (5), format conversion unit (6), projection display unit (7), and power supply and microprocessor unit; The vision signal of described television receiver unit (1) output is connected with the input of signal switch unit (3); Multiple signals interface (2) is connected with the input of signal switch unit (3); The output of signal switch unit (3) is connected with signal recognition unit (4) and AD converting unit (5) respectively; The output of AD converting unit (5) is connected with the input of format conversion unit (6); The output of format conversion unit (6) is connected with projection display unit (7); Above-mentioned each unit is connected with microprocessor.
2. multimedia overhead projector television set according to claim 1 is characterized in that: described multiple signals interface (2) comprises analog video interface, component vide interface, digital visual interface and computer video interface.
3. multimedia overhead projector television set according to claim 1 and 2 is characterized in that: the output signal of described format conversion unit (6) is the progressive-scan signal of consolidation form.
4. multimedia overhead projector television set according to claim 3 is characterized in that: the output signal form of described format conversion unit (6) is: line frequency 15-48kHz, the progressive-scan signal of frame frequency 50-92Hz.
5. multimedia overhead projector television set according to claim 3 is characterized in that: described projection display unit (7) is a CRT back projection display unit.
6. according to claim 1,2 or 4 described multimedia overhead projector television sets, it is characterized in that: described projection display unit (7) is a CRT back projection display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200143238U CN2753076Y (en) | 2004-03-31 | 2004-10-11 | Multimedia projector television set |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200420033523 | 2004-03-31 | ||
| CN200420033523.8 | 2004-03-31 | ||
| CNU2004200143238U CN2753076Y (en) | 2004-03-31 | 2004-10-11 | Multimedia projector television set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2753076Y true CN2753076Y (en) | 2006-01-18 |
Family
ID=35914486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200143238U Expired - Fee Related CN2753076Y (en) | 2004-03-31 | 2004-10-11 | Multimedia projector television set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2753076Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621649A (en) * | 2009-08-10 | 2010-01-06 | 上海闻泰电子科技有限公司 | Portable projector integrated with double interfaces and realizing method thereof |
-
2004
- 2004-10-11 CN CNU2004200143238U patent/CN2753076Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621649A (en) * | 2009-08-10 | 2010-01-06 | 上海闻泰电子科技有限公司 | Portable projector integrated with double interfaces and realizing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060118 Termination date: 20131011 |