CN209748721U - Power panel for laser film projector, projector and projection system - Google Patents
Power panel for laser film projector, projector and projection system Download PDFInfo
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- CN209748721U CN209748721U CN201920637795.5U CN201920637795U CN209748721U CN 209748721 U CN209748721 U CN 209748721U CN 201920637795 U CN201920637795 U CN 201920637795U CN 209748721 U CN209748721 U CN 209748721U
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Abstract
the utility model discloses a power strip, laser film projector and projection system for laser film projector, the power strip includes a plurality of power modules with a plurality of laser light source one-to-one, and each power module includes power supply unit, PWM controller and a plurality of power distribution board that are connected with each laser driver one-to-one in the laser light source that corresponds, wherein power supply unit is used for supplying power to each corresponding laser driver through each power distribution board; and the PWM controller responds to the received control signal and outputs the PWM control signal to the corresponding laser driver in the laser light source. The utility model provides a power strip can reduce the energy consumption of laser film projector to effectively promote the contrast of the projected image of laser film projector.
Description
Technical Field
The utility model relates to a film projection technical field especially relates to a power strip, laser film projector and projection system for laser film projector.
Background
At present, a digital laser cinema projection system includes a playing server, a digital laser cinema projector, an audio device, and the like, wherein the digital laser cinema projector includes a power board, a laser driver, a laser light source, a projection optical engine, and the like, the laser light source includes a laser sub-light source or a plurality of laser sub-light sources (lasers), and correspondingly, the projection optical engine includes an integral digital micromirror array or a plurality of digital micromirror array regions. The mode that a plurality of laser sub-light sources correspond to a plurality of digital micromirror array areas is adopted, so that the brightness of a projected image can be controlled in a partition mode, at the moment, each laser sub-light source projects an image area through the corresponding digital micromirror array area, a projection screen is generally equally divided into N rectangular matrix areas, and N laser modules corresponding to the N rectangular matrix areas are arranged.
Meanwhile, the power panel supplies power to the laser light sources, the laser driver outputs driving currents with fixed sizes to the laser sub light sources, and the laser sub light sources are driven to emit images of each frame of a film to be projected with fixed emitting power. Therefore, in the existing digital laser film projector, no matter whether the laser light source adopts one laser sub-light source or a plurality of laser sub-light sources, the driving current output by the laser driver to the laser sub-light sources is fixed, which results in that the laser sub-light sources emit each frame of image of the film to be projected with fixed emitting power no matter the scene of the image is bright or dim. Therefore, on one hand, the energy consumption of the digital laser film projector is wasted, and on the other hand, the contrast of different frame images or different areas in the same frame image is not improved when the brightness of different frame images or different areas exist in the same frame image, so that the improvement of the digital film projection quality is limited.
Therefore, it is desirable to provide a new power strip for a laser film projector, and a projection system.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one of the above problems, the first aspect of the present invention provides a power supply board for a laser film projector, comprising
A plurality of power supply modules corresponding to the laser light sources one by one, each power supply module including a power supply unit, a PWM controller and a plurality of power distribution boards connected to the laser drivers of the corresponding laser light sources one by one, wherein
the power supply unit is used for supplying power to each corresponding laser driver through each power distribution board;
And the PWM controller responds to the received control signal and outputs the PWM control signal to the corresponding laser driver in the laser light source.
Optionally, the PWM control signal is transmitted to each of the laser drivers through the power distribution board.
Optionally, the power modules further include a synchronization unit connected to the PWM controller, and the synchronization units of the power modules are connected to synchronously output the PWM control signals.
Optionally, each of the synchronization units is connected in series.
Optionally, each power module includes a synchronization unit respectively disposed on each power distribution board, and the synchronization units of each power distribution board of each power module are connected;
The PWM controller is arranged on a certain power distribution board of the power module, is connected with the synchronizing unit of the power distribution board, and outputs PWM control signals to the synchronizing units of other power distribution boards of the power module through the synchronizing unit;
And the synchronous units among the power supply modules are connected to synchronously output the PWM control signals of the power supply modules.
Optionally, each of the synchronization units is connected in series.
Optionally, the power supply unit comprises a main power supply unit and a backup power supply unit.
optionally, the PWM signal is a triangular wave, a sawtooth wave, or a square wave.
The utility model discloses the second aspect provides a laser film projector, including the first aspect the power strip.
A third aspect of the present invention provides a projection system, comprising the second aspect of the present invention, a laser movie projector and a play server for outputting a control signal.
The utility model has the advantages as follows:
The utility model discloses to present problem, formulate a power strip, laser film projector and projection system for laser film projector, export PWM control signal to each laser driver according to the control signal who receives through the PWM controller to the realization is to each laser light source's independent control, has effectively compensatied the problem among the prior art, can reduce the energy consumption of laser film projector, and effectively promote the contrast of the projected image of laser film projector.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows a block diagram of a power panel according to an embodiment of the present invention;
Fig. 2 is a block diagram illustrating a power panel according to another embodiment of the present invention;
Fig. 3a-3b show block diagrams of power strips according to still another embodiment of the present invention;
Fig. 4 shows a block diagram of a power panel according to still another embodiment of the present invention.
Detailed Description
In order to explain the present invention more clearly, the present invention will be further described with reference to the preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
As shown in fig. 1, an embodiment of the present invention provides a power panel for a laser film projector, including a plurality of power modules corresponding to a plurality of laser light sources one to one, each power module including a power supply unit, a PWM controller and a plurality of power distribution boards connected to respective laser drivers in the corresponding laser light sources one to one, wherein the power supply unit is configured to supply power to the respective corresponding laser drivers through the respective power distribution boards; and the PWM controller responds to the received control signal and outputs the PWM control signal to the corresponding laser driver in the laser light source.
in one particular example, a digital laser cinema projector includes a power supply board, a laser driver, a laser light source, and a projection optical engine, wherein the power supply board provides power to the laser light source according to the laser driver and displays a projected image through the projection optical engine. The laser light source comprises one or more laser sub-light sources, each laser sub-light source corresponds to one laser driver, and each laser driver is powered by a power distribution board of the power board. In order to realize the independent control of each laser sub-light source, the power panel outputs PWM control signals to each laser driver according to the received control signals by using a PWM controller.
specifically, a power supply unit of the power supply module supplies power to each power distribution board, the power distribution boards supply power to corresponding laser drivers, the playing server analyzes image data and control signals of a film to be shown from a digital film data packet, and sends the image data of the film to be shown to the projection optical engine for projecting an image; meanwhile, according to a control signal, for example, a brightness parameter of each frame of image corresponding to the image data, the PWM controller of the power supply board is controlled to output a PWM control signal to the corresponding laser driver, and the laser driver outputs a driving current to the laser sub-light source according to the PWM control signal and the power supply distribution board, so that the laser sub-light source is independently controlled according to the film to be projected to realize the partition control of the brightness of the projected image projected by the projection optical engine. The power supply unit comprises a main power supply unit and a standby power supply unit, standard voltage of 220V to 380V is output, the main power supply unit is usually used for supplying power to the power distribution board in the use process, and when the main power supply unit breaks down, the standby power supply unit is used for supplying power to the power distribution board so as to ensure normal film playing, and therefore the condition that playing is interrupted due to the failure of the main power supply unit in the playing process is avoided.
The PWM control signal is a PWM wave, which may be one of a triangular wave, a sawtooth wave, or a square wave. And the PWM control signal controls the laser starter to output driving current to the laser sub-light source by controlling the duty ratio of the PWM wave. When the brightness of different frames of images of a film to be displayed is different, for example, the content scene of the first frame of image is at night, the content scene of the thirtieth frame of image is at noon, the duty ratio of the first frame of image corresponding to the PWM control signal is far smaller than the duty ratio of the thirtieth frame of image, and the output power of the laser light source for outputting the first frame of image is far smaller than the output power of the laser light source for outputting the thirtieth frame of image. Or when there are areas with different brightness in the same frame of image, for example, the content scene of the twentieth frame of image is a night including a bright moon, the duty ratio of the PWM control signal corresponding to the area including the bright moon is much larger than the duty ratios of the PWM control signals of other areas, and the output powers of the laser light source for outputting different bright and dark areas in the twentieth frame of image are different.
In a preferred embodiment, the PWM controller of the power board receives the control signal, and the PWM controller of the power board further includes a USB communication interface or an RS232 serial communication interface for receiving the control signal, and receives an externally transmitted control signal through the USB communication interface or the RS232 serial communication interface, for example, a control signal output by the playback server according to image data of a movie to be shown, so that the PWM controller generates the PWM control signal according to the control signal to meet the requirement of showing the digital laser movie.
In consideration of the problem that the PWM control signals are respectively connected to the laser drivers of the laser light sources, so that the circuit routing density of the power board is too high, in a preferred embodiment, as shown in fig. 2, the PWM control signals are transmitted to the laser drivers through the power distribution board. That is, the PWM control signal transmits a signal using the wiring of the power distribution board, thereby reducing the wiring density of the power distribution board.
in order to realize power supply for large projectors, in a preferred embodiment, the power supply module further comprises a synchronization unit connected with the PWM controller, and the synchronization unit of each power supply module is connected to synchronously output each PWM control signal.
in a specific example, each power module further comprises a synchronization unit for synchronizing the PWM control signals in a plurality of the power modules, and the synchronization unit controls the isolation and delay processing of the corresponding PWM control signals according to the position of the projection area corresponding to each power module, thereby realizing the synchronous projection of each frame of image. As shown in fig. 3a, the synchronization unit is connected to the PWM controller, so that the PWM controller of one power module in the power board outputs a PWM control signal according to the received control signal, and outputs the PWM control signal to each laser driver and transmits the PWM control signal to the synchronization unit of the power module, and the synchronization unit outputs the PWM control signal to other power modules in the plurality of power modules to synchronize the PWM control signal of each power module. As shown in fig. 3b, the synchronization unit is connected to the PWM controller, and the power board outputs the PWM control signal to each power distribution board and simultaneously transmits the PWM control signal to the synchronization unit of the power module, so as to synchronize the PWM control signal of each power module.
In a preferred embodiment, the synchronization units are connected in series. Because each power module is provided with the synchronizing unit, the PWM control signals of each power module can be synchronized through the synchronizing unit, and the power supply to the large-scale projector can be realized through the serial connection, so that the overall structure of the large-scale projector can be simplified, and the hardware cost is reduced.
In view of further simplifying the wiring complexity of the power supply boards, in another preferred embodiment, as shown in fig. 4, each power supply module includes a synchronizing unit respectively disposed at the power distribution boards, the synchronizing units of the power distribution boards of the power supply modules being connected; the PWM controller is arranged on a certain power distribution board of the power module, is connected with the synchronizing unit of the power distribution board, and outputs PWM control signals to the synchronizing units of other power distribution boards of the power module through the synchronizing unit; and the synchronous units among the power supply modules are connected to synchronously output the PWM control signals of the power supply modules.
Specifically, the PWM controller of each power module is disposed in one power distribution board of the power module, each power distribution board includes a synchronization unit, and the PWM controller synchronizes PWM control signals to other power distribution boards of the power module through the corresponding synchronization unit, thereby integrating the wiring of the power boards and reducing the wiring complexity of the power boards; meanwhile, each power module of the power panel is connected through a synchronous power supply to synchronize the PWM control signal of each power module. For example, the synchronization unit of the last power distribution board of the power board 1 is connected with the synchronization unit of the first power distribution board of the power board 2, and the synchronization unit of the last power distribution board of the power board 2 is connected with the synchronization unit of the first power distribution board of the power board 3, so that the power modules are connected through the synchronization units among the power modules, and the synchronization of the PWM control signals of the power modules is realized on the basis that the power modules respectively control the corresponding laser light sources by adopting different PWM control signals. Furthermore, the synchronous units are connected in series to simplify the whole structure of the large-scale projector and reduce the hardware cost.
Corresponding to the above power supply board for a laser film projector, an embodiment of the present invention further provides a laser film projector, including the above power supply board. The laser film projector independently supplies power to different laser sub-light sources through each power module of the power panel, generates PWM control signals for driving each laser driver through the PWM controller according to image data of a film to be projected, and the laser drivers realize independent power supply control of different laser sub-light sources according to the PWM control signals, so that the energy consumption of the laser film projector is reduced, and the contrast of a projected image projected by the laser film projector is effectively improved.
Another embodiment of the present invention further provides a projection system, including the above laser movie projector and a play server for outputting a control signal. The projection system sends control signals of image data of a film to be projected, such as brightness parameters of each frame of image, to a power panel of the laser film projector through the playing server, a PWM controller of the power panel generates PWM control signals for driving each laser driver according to the received control signals, and independent power supply control of different laser sub-light sources is achieved through each laser driver, so that system energy consumption of the projection system is effectively reduced, the projection effect of the projection system is improved, and user experience of viewers is improved.
The utility model discloses to present problem, formulate a power strip, laser film projector and projection system for laser film projector, export PWM control signal to each laser driver according to the control signal who receives through the PWM controller to the realization is to each laser light source's independent control, has effectively compensatied the problem among the prior art, can reduce the energy consumption of laser film projector, and effectively promote the contrast of the projected image of laser film projector.
Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it is obvious for those skilled in the art to make other variations or changes based on the above descriptions, and all the embodiments cannot be exhausted here, and all the obvious variations or changes that belong to the technical solutions of the present invention are still in the protection scope of the present invention.
Claims (10)
1. A power strip for a laser film projector comprising
A plurality of power supply modules corresponding to the laser light sources one by one, each power supply module including a power supply unit, a PWM controller and a plurality of power distribution boards connected to the laser drivers of the corresponding laser light sources one by one, wherein
The power supply unit is used for supplying power to each corresponding laser driver through each power distribution board;
And the PWM controller responds to the received control signal and outputs the PWM control signal to the corresponding laser driver in the laser light source.
2. The power strip of claim 1, wherein said PWM control signal is transmitted to said laser drivers through said power distribution board.
3. the power strip of claim 1 or 2, wherein the power modules further comprise a synchronization unit connected to the PWM controller, the synchronization unit of each power module being connected to synchronously output the PWM control signal of each power module.
4. The power strip of claim 3, wherein each of said synchronizing cells is connected in series.
5. The power strip of claim 3,
each power supply module comprises a synchronization unit arranged on each power distribution board, and the synchronization units of the power distribution boards of the power supply modules are connected;
The PWM controller is arranged on a certain power distribution board of the power module, is connected with the synchronizing unit of the power distribution board, and outputs PWM control signals to the synchronizing units of other power distribution boards of the power module through the synchronizing unit;
And the synchronous units among the power supply modules are connected to synchronously output the PWM control signals of the power supply modules.
6. the power strip of claim 5, wherein each of said synchronizing cells is connected in series.
7. The power strip of claim 1, wherein said power supply unit comprises a main power supply unit and a backup power supply unit.
8. The power strip of claim 1, wherein the PWM signal is a triangular wave, a sawtooth wave, or a square wave.
9. A laser movie projector comprising the power supply board according to any one of claims 1 to 8.
10. A projection system comprising the laser cinema projector of claim 9 and a playout server for outputting control signals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920637795.5U CN209748721U (en) | 2019-05-06 | 2019-05-06 | Power panel for laser film projector, projector and projection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920637795.5U CN209748721U (en) | 2019-05-06 | 2019-05-06 | Power panel for laser film projector, projector and projection system |
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| CN209748721U true CN209748721U (en) | 2019-12-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021190574A1 (en) * | 2020-03-24 | 2021-09-30 | 深圳市中科创激光技术有限公司 | Laser light source control system and control method therefor |
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- 2019-05-06 CN CN201920637795.5U patent/CN209748721U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021190574A1 (en) * | 2020-03-24 | 2021-09-30 | 深圳市中科创激光技术有限公司 | Laser light source control system and control method therefor |
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