CN113099193B - Projector, immersive projection system and method - Google Patents
Projector, immersive projection system and method Download PDFInfo
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- CN113099193B CN113099193B CN201911334304.0A CN201911334304A CN113099193B CN 113099193 B CN113099193 B CN 113099193B CN 201911334304 A CN201911334304 A CN 201911334304A CN 113099193 B CN113099193 B CN 113099193B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/3147—Multi-projection systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
- H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
- H04N13/344—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] with head-mounted left-right displays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/363—Image reproducers using image projection screens
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/398—Synchronisation thereof; Control thereof
Abstract
The invention provides a projector, an immersive projection system and a method. The immersive projection system comprises a 3D viewing device, a first projector and a second projector, wherein the first projector and the second projector are used for splicing projection, the first projector emits a first synchronous signal, the second projector closes a second synchronous signal, and the 3D viewing device receives the first synchronous signal of the first projector for 3D display synchronization. The projector adds the function of 3D synchronous signal switch in the OSD, thereby having greater elasticity to select and ensure the normal use of the 3D function. The immersive projection system and the immersive projection method can solve the problem that the 3D viewing equipment in the immersive system cannot be normally synchronized by closing the 3D synchronizing signals of one part of projectors in the immersive projection system and sharing the 3D synchronizing signals of the other part of projectors.
Description
Technical Field
The present invention relates to projection display technologies, and in particular, to a projector, an immersive projection system, and a method for virtual reality applications.
Background
At present, immersive interactive projection means that a projection picture is projected on a large or multi-surface projection screen through a multi-channel projection fusion technology, so that audiences have the feeling of being placed in a film. The immersive projection can fully cover the visual angle of the audience, and the audience is fully immersed in a high-level virtual simulation environment (such as comprising five groups of pictures including left, middle, right, upper and lower pictures) surrounded by the stereoscopic projection picture, so that an immersive three-dimensional stereoscopic audio-visual image and interactive feeling are obtained. The CAVE immersive system is a highly immersive virtual reality system, which organically combines a high-resolution stereoscopic projection technology, a three-dimensional computer graphic technology, a sound technology and the like to generate a completely immersive virtual environment, and viewers wear stereoscopic glasses or head tracking equipment to feed back the viewpoint position to a computer system in real time and experience the feeling of being personally on the scene.
In the prior art, DLP Link 3D technology of texas instruments and companies has an application advantage that it is mainly implemented without additional transmitter, and only a synchronization pulse signal (sync pulse) transmitted in a projection image by a projector is used, and the synchronization of left and right eye images is achieved by detecting the position of the synchronization pulse signal with 3D glasses, so that a 3D display effect can be achieved. The synchronous pulse signal is added between corresponding pictures of the left eye and the right eye, the projection chip is usually controlled to send out a synchronous pulse signal, and the photosensitive element at the front end of the 3D glasses senses the pulse, so that the light valves of the left lens and the right lens are alternately opened and closed, and the synchronous action is completed.
In the prior art, a single 3D projection is usually used in the past, or when a plurality of projectors of the same model perform 3D splicing fusion projection, because the clock jitter (sync pulse jitter) of the synchronization pulse signal is small, the 3D glasses only trigger a group of rising or falling edges, so the 3D glasses can also stably switch the left and right eye light valves alternately. However, in the application of the CAVE immersion system, a plurality of projectors with different focal lengths are often needed to complete the splicing and fusion, and the difference in the design of different kinds of projectors can cause the arrival time of the signal edge of the synchronization pulse signal to have a larger deviation with the ideal time, so that the 3D glasses receive different synchronization pulse signals at the same time, and the left and right eye light valves are disordered during synchronization, thereby failing to realize the 3D display effect.
Disclosure of Invention
In view of the above technical problems, the present invention provides a projector, an immersive projection system, and a method thereof.
The invention provides a projector, which comprises a data processing module and an OSD module, wherein the data processing module is used for detecting 3D video data and converting the 3D video data into a 3D format picture signal, the OSD module comprises a switch component used for controlling a synchronous signal in the 3D format picture signal, and the synchronous signal is used for triggering the opening of one of a left eye light valve and a right eye light valve of a 3D viewing device; when the switch component is turned on, the data processing module inserts the synchronous signal into the 3D format picture signal and takes the 3D format picture signal inserted with the synchronous signal as an output signal for projection output; when the switch component is closed, the data processing module takes the 3D format picture signal as an output signal for projection output.
Preferably, the data processing module instructs the switch component in the OSD module to turn on when detecting the 3D video data.
Preferably, the 3D format picture signal includes a left-eye image signal and a right-eye image signal.
Preferably, the projector is used for splicing with another projector for projection, wherein a switch component of the projector is turned on, and a switch component of the other projector is turned off; when a user views the projection output image of the other projector through the 3D viewing device, the 3D viewing device opens one of the left eye light valve and the right eye light valve and closes the other one of the left eye light valve and the right eye light valve according to the synchronization signal of the projector.
The invention also provides a projector, comprising a 3D viewing device, a first projector and a second projector, wherein the first projector and the second projector are used for splicing projection, and the first projector emits a first synchronization signal, characterized in that the second projector turns off the second synchronization signal, and the 3D viewing device receives the first synchronization signal of the first projector for 3D display synchronization; the 3D viewing device comprises a receiver, a left eye light valve and a right eye light valve, wherein the receiver receives the first synchronization signal to control the switching time sequence of the left eye light valve and the right eye light valve.
Preferably, the first projector and the second projector are projectors of different models.
Preferably, the immersive projection system comprises two first projectors; wherein one of the two first projectors turns on a first synchronization signal; alternatively, both the first projectors turn on the first synchronization signal.
Preferably, the first projector includes a first data processing module, the first data processing module is configured to detect the 3D video data and convert the 3D video data into a first 3D format image signal, and the first 3D format image signal includes the first synchronization signal.
Preferably, the first projector further comprises a first OSD module, the first OSD module comprises a first switch component for controlling the first synchronization signal in the first 3D format picture signal, wherein the first synchronization signal is used for triggering the opening of one of a left eye light valve and a right eye light valve of the 3D viewing device; when the first switch component is turned on, the first data processing module inserts the first synchronous signal into the first 3D format picture signal, and projects and outputs the first 3D format picture signal inserted with the first synchronous signal as an output signal; when the first switch component is closed, the first data processing module takes the first 3D format picture signal as an output signal for projection output.
Preferably, the second projector includes a second data processing module and a second OSD module, the second data processing module is configured to detect the 3D video data and convert the 3D video data into a second 3D format image signal, the second 3D format image signal includes the second synchronization signal, the second OSD module includes a second switch component configured to control the second synchronization signal in the second 3D format image signal, wherein the second synchronization signal is configured to trigger the opening of one of a left eye light valve and a right eye light valve of the 3D viewing device; when the second switch component is turned on, the second data processing module inserts the second synchronous signal into the second 3D format picture signal, and projects and outputs the second 3D format picture signal inserted with the second synchronous signal as an output signal; when the second switch component is closed, the second data processing module takes the second 3D format picture signal as an output signal for projection output.
The invention also provides an immersive projection method, which comprises the following steps: providing at least one first projector and at least one second projector, the at least one first projector and the at least one second projector being used to stitch the projections; controlling the at least one first projector to send a first synchronization signal, and controlling the at least one second projector to turn off a second synchronization signal; receiving, by a 3D viewing device, the first synchronization signal provided by the at least one first projector for 3D display synchronization.
Preferably, the OSD module of the at least one second projector is used for selectively controlling the second synchronization signal to be turned off and on.
Compared with the prior art, the projector has the advantages that the function of a 3D synchronous signal switch is added in the OSD, so that a user has greater flexibility to select and ensure the normal use of the 3D function when a single 3D projection or a plurality of 3D splicing and fusing devices are used. The immersive projection system and the immersive projection method can solve the problem that the 3D viewing equipment in the CAVE immersive system cannot be normally synchronized by closing the 3D synchronizing signals of one part of projectors in the system and sharing the 3D synchronizing signals of the other part of projectors.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a system diagram of a projector according to an embodiment of the invention.
FIG. 2 is a schematic view of an immersive projection system according to an embodiment of the present invention.
FIG. 3 is a flowchart illustrating an immersive projection method according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a 3D format picture signal according to an embodiment of the invention.
FIG. 5 is a diagram illustrating a 3D format picture signal when the control synchronization signal is turned off according to the present invention.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
Referring to fig. 1, fig. 1 is a system schematic diagram of a 3D projector according to an embodiment of the invention. The projector 10 of the present invention includes a data processing module 1 and an OSD module 2. In practical applications, for example in DLP-based projectors, the data processing module 1 may be integrated in a DLP chipset.
The data processing module 1 is used for detecting 3D video data and converting the 3D video data into a 3D format image signal, and the OSD module 2 includes a switch component 21 for controlling a synchronization signal in the 3D format image signal, wherein the synchronization signal is used for triggering the opening of one of a left eye light valve and a right eye light valve of the 3D viewing device. In practical application, the synchronization signal may be a white peak Pulse (DLP Link Pulse), and the corresponding 3D viewing device is equipped with a photosensitive element with high sensitivity, for turning over the left and right eyeglass light valves of the glasses when receiving the white peak Pulse on the screen; the synchronization signal may also emit light (e.g., infrared light) through the frame synchronization signal emitting device, and the corresponding 3D viewing apparatus is mounted with a photosensor sensing the corresponding light.
When the switch component 21 is turned on, the data processing module 1 inserts the synchronization signal into the 3D format picture signal, and projects and outputs the 3D format picture signal into which the synchronization signal is inserted as an output signal. That is, when the switch element 21 controls the synchronization signal to be turned on, the 3D format picture signal output by the data processing module 1 may have the synchronization signal. When the switching component 21 controls the synchronization signal to be turned off, the data processing module 1 projects and outputs the 3D format picture signal as an output signal. That is, when the switch module 21 controls the synchronization signal to be turned off, the 3D format picture signal output by the data processing module 1 does not have the synchronization signal for 3D display synchronization.
Preferably, the data processing module 1 instructs the switch component 21 in the OSD module 2 to turn on when detecting the 3D video data. In practical applications, the switch assembly 21 may be automatically turned on in the above manner, or may be turned on manually by a user, and the invention is not limited thereto.
Please refer to fig. 4 in combination, fig. 4 is a schematic diagram of a 3D format picture signal according to an embodiment of the present invention. The 3D format picture signal 3 includes a left-eye image signal 31 and a right-eye image signal 32. When the switch component 21 does not control the synchronous signal to be turned off, the 3D format picture signal 3 output by the data processing module 1 has the synchronous signal 33 therein. For example, at a display refresh rate of 120Hz, a frame F is displayed every 1/120 second, each frame F includes a left-eye image sub-frame Fl and a right-eye image sub-frame Fr, and a synchronization signal 33 is controllably generated between the left-eye image signal 31 and the right-eye image signal 32.
Please refer to fig. 5 in combination, wherein fig. 5 is a schematic diagram of a 3D format frame signal when the synchronization signal is controlled to be turned off according to the present invention. When the switch component 21 controls the synchronization signal to be turned off, the 3D format image signal 3 'output by the data processing module 1 does not have the synchronization signal for 3D display synchronization, and the 3D format image signal 3' still includes the left-eye image signal 31 and the right-eye image signal 32. For example, at a display refresh rate of 120Hz, one image frame F is displayed every 1/120 second, each image frame F includes a left-eye image sub-frame Fl and a right-eye image sub-frame Fr, and the synchronization signal 33 is not generated between the left-eye image signal 31 and the right-eye image signal 32.
The projector adds the function of a 3D synchronous signal switch in the OSD module, so that a user has greater elasticity to select and ensure the normal use of the 3D function when a single 3D projection or a plurality of 3D splicing and fusing are used.
Referring to fig. 2, fig. 2 is a schematic view of an immersion type projection system according to an embodiment of the invention. The immersive projection system 100 of the present invention includes a 3D viewing device 103, a first projector 101, and a second projector 102. The first projector 101 and the second projector 102 are used to stitch the projections. The first projector 101 emits a first synchronization signal. The second projector 102 turns off its second synchronization signal. The 3D viewing device 103 receives the first synchronization signal of the first projector 101 for 3D display synchronization. The 3D viewing device 103 includes a receiver, a left eye light valve and a right eye light valve, and the receiver receives the first synchronization signal to control the on/off timing of the left eye light valve and the right eye light valve.
The 3D viewing device 103 may be shutter 3D glasses, a Head Mounted Display (HMD), or the like. For example, a photosensitive element serving as a receiver is disposed at the front end of the 3D viewing device, and when the photosensitive element senses the first synchronization signal, the liquid crystal light valves at the left and right lenses are alternately opened and closed accordingly, so as to complete the 3D synchronization of the left and right eyes. Specifically, for example, when a synchronization signal (t 0) is received, the left eye light valve of the 3D viewing device is opened, and the right eye light valve is closed; when a next synchronizing signal (t 1) is received, a right eye light valve of the 3D viewing device is opened, and a left eye light valve is closed; upon receiving the next synchronization signal (t 2), the left eye light valve and the right eye light valve of the 3D viewing device are flipped over again.
Preferably, the first projector 101 and the second projector 102 are different models of projectors.
Fig. 2 shows three first projectors 101 and one second projector 102, but the invention is not limited thereto. The immersive projection system of the present invention may also include more than two projectors, and in use, only the synchronization signal for one projector is retained, while the synchronization signals for the remaining projectors are turned off.
Preferably, two or more first projectors 101 may be included in the immersive projection system; wherein at least one of the two or more first projectors 101 turns on a first synchronization signal; alternatively, the two or more first projectors 101 may turn on the first synchronization signal.
With reference to the embodiment shown in fig. 1, preferably, the first projector 101 includes a first data processing module, the first data processing module is configured to detect the 3D video data and convert the 3D video data into a first 3D format image signal, and the first 3D format image signal includes the first synchronization signal. Preferably, the first projector 101 further comprises a first OSD module, which includes a first switch element for controlling the first synchronization signal in the first 3D format picture signal, wherein the first synchronization signal is used to trigger the opening of one of a left eye light valve and a right eye light valve of the 3D viewing device; when the first switch component is turned on, the first data processing module inserts the first synchronous signal into the first 3D format picture signal, and projects and outputs the first 3D format picture signal inserted with the first synchronous signal as an output signal; when the first switch component is closed, the first data processing module takes the first 3D format picture signal as an output signal for projection output, namely the first 3D format picture signal which is output at the moment does not have the first synchronous signal.
Preferably, the second projector 102 includes a second data processing module and a second OSD module, the second data processing module is configured to detect the 3D video data and convert the 3D video data into a second 3D format picture signal, the second 3D format picture signal includes the second synchronization signal, the second OSD module includes a second switch element configured to control the second synchronization signal in the second 3D format picture signal, wherein the second synchronization signal is configured to trigger the opening of one of a left eye light valve and a right eye light valve of the 3D viewing device; when the second switch component is turned on, the second data processing module inserts the second synchronizing signal into the second 3D format picture signal, and projects and outputs the second 3D format picture signal inserted with the second synchronizing signal as an output signal; when the second switch component is turned off, the second data processing module projects and outputs the second 3D format picture signal as an output signal, that is, the second 3D format picture signal output at this time does not have the second synchronization signal. Therefore, even when a user watches the projection output picture of the second projector through the 3D watching equipment, the 3D watching equipment can open one of the left eye light valve and the right eye light valve and close the other one of the left eye light valve and the right eye light valve according to the synchronous signal of the first projector, so that the left eye light valve and the right eye light valve can be opened and closed alternately.
Referring to fig. 3, fig. 3 is a flowchart of an immersion type projection method according to an embodiment of the invention. An immersive projection method of the present invention includes the following steps.
S1, providing at least one first projector and at least one second projector, wherein the at least one first projector and the at least one second projector are used for splicing projection.
And S2, controlling the at least one first projector to send out a first synchronous signal, and controlling the at least one second projector to close a second synchronous signal.
And S3, receiving the first synchronization signal provided by the at least one first projector by using the 3D viewing equipment so as to synchronize the 3D display.
Preferably, in step S2, the OSD module of the at least one second projector is used to selectively control the turning off and on of the second synchronization signal.
For example, taking the application of three first projectors and one second projector in CAVE environment as an example, only the 3D synchronization signal of the second projector needs to be turned off, and the 3D viewing device only receives the synchronization signal of the first projector, so that the problem that the original 3D viewing device is confused and fails to synchronize the 3D viewing device due to capturing two synchronization signals with large position difference at the same time can be solved.
The projector adds the function of a 3D synchronous signal switch in the OSD, so that a user has greater elasticity to select and ensure the normal use of the 3D function when a single 3D projection or a plurality of 3D splicing fusion are used. The immersive projection system and the immersive projection method can solve the problem that the 3D viewing equipment in the CAVE immersive system cannot be normally synchronized by closing the 3D synchronizing signals of one part of projectors in the system and sharing the 3D synchronizing signals of the other part of projectors.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. Furthermore, the technical features mentioned in the different embodiments of the present invention described above may be combined with each other as long as they do not conflict with each other. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that the invention be covered by the appended claims without departing from the spirit and scope of the invention.
Claims (12)
1. A projector comprises a data processing module and an OSD module, and is characterized in that the data processing module is used for detecting 3D video data and converting the 3D video data into a 3D format picture signal, the OSD module comprises a switch component used for controlling a synchronous signal in the 3D format picture signal, wherein the synchronous signal is used for triggering the opening of one of a left eye light valve and a right eye light valve of a 3D viewing device;
when the switch component is turned on, the data processing module inserts the synchronous signal into the 3D format picture signal and takes the 3D format picture signal inserted with the synchronous signal as an output signal for projection output; when the switch component is closed, the data processing module takes the 3D format picture signal as an output signal for projection output.
2. The projector as claimed in claim 1, wherein the data processing module instructs the switch component of the OSD module to turn on when the 3D video data is detected.
3. The projector according to claim 1, wherein the 3D format picture signal includes a left-eye image signal and a right-eye image signal.
4. The projector of claim 1, wherein the projector is configured to stitch the projection with another projector; wherein, the switch component of the projector is turned on, and the switch component of the other projector is turned off; when a user watches the projection output picture of the other projector through the 3D watching equipment, the 3D watching equipment opens one of the left eye light valve and the right eye light valve and closes the other one of the left eye light valve and the right eye light valve according to the synchronous signal of the projector.
5. An immersive projection system comprising a 3D viewing device, a first projector and a second projector, the first projector and the second projector being for tiled projection, the first projector emitting a first synchronization signal, characterised in that the second projector turns off the second synchronization signal, the 3D viewing device receiving the first synchronization signal of the first projector for 3D display synchronization; the 3D viewing device comprises a receiver, a left eye light valve and a right eye light valve, wherein the receiver receives the first synchronization signal to control the switching time sequence of the left eye light valve and the right eye light valve.
6. The immersive projection system of claim 5, wherein the first projector and the second projector are different models of projectors.
7. The immersive projection system of claim 5, wherein two first projectors are included in the immersive projection system; wherein, the first and the second end of the pipe are connected with each other,
one of the two first projectors starts a first synchronization signal; alternatively, both the first projectors turn on the first synchronization signal.
8. The immersive projection system of claim 5, wherein the first projector comprises a first data processing module, the first data processing module is configured to detect 3D video data and convert the 3D video data into a first 3D format frame signal, and the first 3D format frame signal comprises the first synchronization signal.
9. The immersive projection system of claim 8, wherein the first projector further comprises a first OSD module, the first OSD module comprising a first switch element for controlling the first synchronization signal in the first 3D format picture signal, wherein the first synchronization signal triggers the opening of one of a left eye light valve and a right eye light valve of the 3D viewing device; when the first switch component is turned on, the first data processing module inserts the first synchronous signal into the first 3D format picture signal, and projects and outputs the first 3D format picture signal inserted with the first synchronous signal as an output signal; when the first switch component is closed, the first data processing module takes the first 3D format picture signal as an output signal for projection output.
10. The immersive projection system of claim 5, wherein the second projector comprises a second data processing module and a second OSD module, the second data processing module is configured to detect the 3D video data and convert the 3D video data into a second 3D format image signal, the second 3D format image signal comprises the second synchronization signal, the second OSD module comprises a second switch element configured to control the second synchronization signal in the second 3D format image signal, wherein the second synchronization signal is configured to trigger the opening of one of a left-eye light valve and a right-eye light valve of the 3D viewing device; when the second switch component is turned on, the second data processing module inserts the second synchronizing signal into the second 3D format picture signal, and projects and outputs the second 3D format picture signal inserted with the second synchronizing signal as an output signal; when the second switch component is closed, the second data processing module takes the second 3D format picture signal as an output signal for projection output.
11. An immersive projection method, comprising:
providing at least one first projector and at least one second projector, the at least one first projector and the at least one second projector being used to stitch the projections;
controlling the at least one first projector to send out a first synchronization signal, and controlling the at least one second projector to close a second synchronization signal;
receiving, by a 3D viewing device, the first synchronization signal provided by the at least one first projector for 3D display synchronization.
12. The immersive projection method of claim 11, wherein the OSD module of the at least one second projector is used to selectively control the turning off and on of the second synchronization signal.
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