JP2016052048A - Projection type display device, multi-projection system, multi-projection system control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection type display device, a multi-projection system, a multi-projection system control method, and a program capable of reducing adjustment of a projection image.SOLUTION: The projection type display device (first projection type display device, hereafter) capable of projection on a projected screen a projection image based on a beam from light source means comprises: acquisition means which acquires light source information relating to the light volume of the light source means of a second projection type display device for projecting an image in an area different from that of the first projection type display device on a projected face, the information having been obtained from the second projection type display device; and control means which controls the light volume from the light source means of the first projection type display device, on the basis of light source information acquired by the acquisition means.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a projection display device, a multi-projection system, a control method for a multi-projection system, and a program.

  2. Description of the Related Art Conventionally, a multi-projection is known in which a plurality of projection display devices are used and projected onto the same surface, thereby enabling projection at a resolution higher than that provided in the projection display device or projection over a wide range. Since the individual characteristics of the projection display device are not uniform, simply arranging the projected images causes a difference in luminance or color between the projected images. Therefore, when performing multi-projection, it is necessary to adjust the projection image of each projection display device so that the projection image is uniform as the entire screen. For example, Patent Document 1 discloses a technique for controlling the light amount of a light source using a sensor camera that captures a projection screen so that the brightness of the screen is constant.

JP 2006-50255 A

  However, in the prior art disclosed in Patent Document 1, when a projection display device having a low light source brightness or a large degree of deterioration of the light source is used, the image quality of other projection display devices is adjusted in accordance with the characteristics. Must be adjusted.

  In view of such a problem, an object of the present invention is to provide a projection display device, a multi-projection system, a control method for a multi-projection system, and a program that can reduce adjustment of a projected image.

  A projection display device according to one aspect of the present invention is a projection display device capable of projecting a projection image based on a light beam from a light source means onto a projection surface, and the projection display device is the projection display device on the projection surface. Based on the light source information acquired by the acquisition means, the acquisition means for acquiring light source information relating to the light amount of the light source means of the other projection display apparatus obtained from another projection display apparatus that projects an image in a different area And a control means for controlling the amount of light from the light source means of the projection display device.

  A multi-projection system according to another aspect of the present invention includes a plurality of projection display devices including light source means, light source information regarding the light amount of the light source means from the projection display device, and based on the light source information. And a master device for controlling the amount of light from the light source means for each projection display device.

  According to another aspect of the present invention, there is provided a control method for a multi-projection system, comprising: obtaining light source information relating to a light amount of the light source means from a plurality of projection display devices including light source means; and based on the light source information. And a step of controlling the amount of light from the light source means for each of the projection display devices.

  According to another aspect of the present invention, there is provided a program for acquiring light source information relating to a light amount of a light source unit from a plurality of projection display devices including a light source unit, and the projection display based on the light source information. A step of controlling a light amount from the light source means for each device;

  According to the present invention, it is possible to provide a projection display apparatus, a multi-projection system, a control method for a multi-projection system, and a program that can reduce adjustment of a projected image.

1 is a configuration diagram of a multi-projection system of Example 1. FIG. 3 is a flowchart of a control method for the multi-projection system according to the first embodiment. FIG. 6 is a diagram illustrating an example of light source information according to the first embodiment. FIG. 6 is a configuration diagram of a multi-projection system of Example 2. 10 is a flowchart of a control method for the multi-projection system according to the second embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the same members are denoted by the same reference numerals, and redundant description is omitted.

  First, the configuration of the multi-projection system of the present embodiment will be described with reference to FIG. FIG. 1 is a configuration diagram of a multi-projection system. The projection display devices 100a and 100b configured to project a projected image have the same configuration and are connected to the master device 200 so as to be communicable. The connection method may be either wired or wireless. The master device 200 may use a general PC (Personal Computer) or a dedicated controller.

  A video signal given from an external device such as a PC is input to the video signal processing unit 101. The video signal processing unit 101 performs AD conversion for converting an analog signal such as a VGA signal or a Video signal into a digital signal, or conversion from a digital signal such as an HDMI (registered trademark) signal or a DVI signal into a predetermined digital signal format. . Furthermore, menu display processing and resolution conversion during operation are performed, and a signal for driving the liquid crystal panel in the optical unit 105 is generated.

  The power supply unit 102 converts AC power input from the outside into DC power, and supplies power to each unit in the ballasts 103a1, 103a2, 103b1, 103b2, or the projection display devices 100a, 100b. Further, the power supply unit 102 also performs power factor improvement by a PFC (Power Factor Correction) circuit.

  Ballasts 103 a 1, 103 a 2, 103 b 1, and 103 b 2 are power sources of the light sources (light source means) 104 a 1, 104 a 2, 104 b 1, and 104 b 2, and turn on / off each light source under the control of the control unit 108. In addition, when each light source is not lit, the control unit 108 is notified.

  The optical unit 105 includes an illumination optical element, a liquid crystal panel, a color separation unit, a color synthesis unit, and the like. Luminous flux from each light source is synthesized while the illumination distribution is made uniform by the illumination optical element. Thereafter, the color separation unit separates the three RGB colors, and the separated light is applied to the liquid crystal panels of the three RGB colors. The liquid crystal panel changes the transmittance (reflectance) according to the drive signal, and combines the transmitted light (reflected light) of each of the three RGB colors in the color composition unit to generate an image. The image generated by the optical unit 105 is enlarged and projected onto the screen (projected surface) by the projection lens 106. At this time, each projected image is projected onto different areas on the screen so as not to overlap with other projected images, but a part of the projected image may have a portion overlapping with another projected image.

  The control unit 108 includes a CPU such as a microcomputer, and performs general control of the projection display devices 100a and 100b. For example, each light source is turned on / off by a control signal to each ballast, power supply control to each circuit, or FAN driving for cooling is performed. In addition, a process of notifying the user of an abnormality by turning on the LED, such as non-lighting of each light source or temperature abnormality in the projection display devices 100a and 100b, is also performed.

  The communication unit 107 communicates with external devices of the projection display devices 100a and 100b. For example, it is connected to the master device 200 via RS232C or LAN, and transmits / receives data to / from the master device 200.

  The storage unit 109 is configured by a nonvolatile memory such as an EEPROM or a FLASH memory, and is used for setting data of the projection display devices 100a and 100b, status recording at the time of occurrence of an abnormality (error code recording), and the like. The storage unit 109 is connected to the control unit 108.

  Next, a method for controlling the master device 200 and the projection display devices 100a and 100b will be described with reference to FIGS.

  FIG. 2 is a flowchart of a control method for the multi-projection system. The method shown in FIG. 2 can be embodied as a program for causing a computer to execute the function of each step, and can be executed by the master device 200 in this embodiment.

  FIG. 3 is a diagram illustrating an example of light source information regarding the light amount of each light source. The light source information is at least one of the brightness of the light source, the usage time, and the number of times of lighting. By turning on light sources having substantially the same light source information values, it is possible to bring the brightness of the projected image of each projection display device closer. In this embodiment, the brightness of the light source is used as the light source information. The numerical value described in the light source brightness column of FIG. 3 means the brightness level, and is a relative value when a new state where the brightness is not lowered is set to 100. Also, two modes of “eco mode” and “brightness priority mode” are prepared as lighting modes, and the selection of a light source (lighting light source) to be lit is changed according to the lighting mode. In the “eco mode”, the criterion of light source selection is to suppress power consumption, and only one lighting source is selected for each projection display means. In the “brightness priority mode”, projection as bright as possible is used as a reference for light source selection, and not only one lighting source but also a plurality of projection display means may be selected.

  First, the operation of the master device 200 will be described. When projection as multi-projection is started, in step S1001, the master device 200 requests each projection display device to transmit light source information. In step S1002, the master device 200 determines whether light source information has been received from each projection display device. If all the light source information has been acquired, the process proceeds to step S1003. In step S1003, a lighting light source is selected from the light sources of the projection display devices. In this embodiment, the light source brightness of the lighting light source is selected to be the closest. In the example shown in FIG. 3, when “eco mode” is selected, one light source is turned on as a reference. Therefore, the projection display device 100 a uses the light source 104 a 2 and the projection display device 100 b uses the light source 104 b 1 as a lighting light source. select. When the “brightness priority mode” is selected, the light source 104a1 is selected as the lighting light source in the projection display apparatus 100a, and the light sources 104b1 and 104b2 are selected as the lighting light sources in the projection display apparatus 100b. By doing so, it is possible to project as brightly as possible and to bring the brightness of each projection display device closer. In step S1004, the master device 200 transmits information on the lighting light source (lighting light source information) to each projection display device.

  Next, the operation of each projection display device will be described. In step S2001, the control unit 108 of each projection display apparatus determines whether a light source information transmission request is received from the master device 200 through the communication unit 107. If a light source information transmission request is received from the master device 200, the process advances to step S2002. In step S2002, the control unit 108 reads the light source information of each light source recorded in the storage unit 109. In step S2003, each projection display device transmits the read light source information to the master device 200 through the communication unit 107. In the example shown in FIG. 3, the projection display apparatus 100 transmits the light source information 95 and 60 of the light sources 104a1 and 104a2, and the projection display apparatus 100b transmits the brightness information 55 and 45 of the light sources 104b1 and 104b2. In step S2004, the control unit 108 determines whether each projection display device has received lighting light source information. In step S2005, the control unit 108 turns on the light source according to the received lighting light source information.

  With the above processing, the brightness of the projection image of each projection display device becomes close, so that a multi-projection system capable of reducing the adjustment of the projection image can be provided.

  In the first embodiment, the case where the master device 200 is provided separately from the projection display devices 100a and 100b such as a PC has been described. However, the master device 200 is not necessarily required, and the control unit 108 of the projection display device acquires the light source information from other projection display devices and the control unit that selects the lighting light source based on the light source information. You may play a role. In this embodiment, a case where the projection display device 100a functions as a master device without providing a master device will be described with reference to FIGS. In this embodiment, the master device is configured by the projection display device 100a, but may be configured by the projection display device 100b.

  FIG. 4 is a configuration diagram of the multi-projection system of the present embodiment. In the system configuration of the present embodiment, only the master device 200 is deleted from the system configuration of the first embodiment, and there are no other changes, so the configuration of each projection display device is omitted.

  Next, a control method of the multi-projection system will be described with reference to FIG. FIG. 5 is a flowchart for the control method of the multi-projection system of the present embodiment. The method shown in FIG. 5 can be embodied as a program for causing a computer to execute the function of each step. In this embodiment, the method can be executed by the projection display device 100a. Since the operation of the projection display device 100b is the same as that of the first embodiment, the description thereof is omitted.

  When the projection display device 100a functions as a master device, in addition to the processing for selecting the light source of the master device, it is necessary to check the light source information of the master device and turn on the selected light source. In the flowchart of FIG. 5, only the process of checking the light source information (step S1102) and turning on the selected light source (step S1106) is added, and the other processes are not changed. In the present embodiment, as in the first embodiment, the light source information is at least one of the brightness of the light source, the usage time, and the number of times of lighting.

  The projection display device 100a serving as the master device requests the projection display device 100b to transmit light source information in step S1101, and then checks the light source information of the light sources 104a1 and 104a2 that the projection display device 100a has in step S1102. The projection display apparatus 100a determines whether or not the light source information is received from the projection display apparatus 100b in step S1103. If the light source information is acquired, the process proceeds to step S1104. In step S1104, the projection display apparatus 100a selects a light source (lighting light source) to be lit among the light sources of each projection display apparatus based on its own light source information, and in step S1105, information on the lighting light source (lighting light source) is selected. Information) is transmitted to the projection display apparatus 100b. In step S1106, the projection display apparatus 100a performs lighting processing of the light source that the projection display apparatus 100a has according to the light source selection processing in step S1104.

  As a result of the above processing, the brightness of the projection image of each projection display device becomes close, so that it is possible to provide a multi-projection system that can reduce the adjustment of the projection image, and the projection display device can also serve as a master device. It becomes.

  In the present embodiment, multi-projection is performed using two projection display devices, but multi-projection may be performed using a larger number of projection display devices. In that case, the brightness of the projection image of each projection display device can be made closer by selecting the lighting light source so that the difference in the light source information becomes small. More preferably, by selecting the lighting light source so that the difference between the maximum value and the minimum value of the light source information is minimized, the brightness of the projection image of each projection display device can be made closer.

  In the present embodiment, each projection display device includes a plurality of light sources. However, the projection display device does not need to include a plurality of light sources as long as the light amount can be changed instantaneously. In that case, instead of selecting the lighting light source based on the light source information as in the present embodiment, the light amount of the light source may be adjusted based on the light source information.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

100a Projection type display device 104a1, 104a2 Light source (light source means)
108 Control unit (control means, acquisition means)

Claims (13)

A projection display device capable of projecting a projection image based on a light beam from a light source means onto a projection surface,
Obtaining means for obtaining light source information relating to the light amount of the light source means of the other projection display device obtained from another projection display device that projects an image on a region different from the projection display device on the projection surface;
A projection display device comprising: control means for controlling the amount of light from the light source means of the projection display device based on the light source information acquired by the acquisition means.   The control means controls the amount of light from the light source means of the projection display apparatus so that a difference between the light source information of the projection display apparatus and the light source information acquired by the acquisition means becomes small. The projection display device according to claim 1.   The projection display device according to claim 1, wherein the light source information is at least one of brightness, usage time, and number of lighting times of each light source unit. The projection display device includes a plurality of light source means,
4. The projection display device according to claim 1, wherein the control unit selects a light source unit to be turned on among the plurality of light source units. 5. A plurality of projection display devices provided with light source means;
A master device that acquires light source information relating to a light amount of the light source unit from the projection display device, and controls the light amount from the light source unit for each of the projection display devices based on the light source information. Multi-projection system.   The multi-projection system according to claim 5, wherein the master device controls the amount of light from the light source unit so that a difference in the light source information becomes small.   The multi-projection system according to claim 5 or 6, wherein the master device controls the amount of light from the light source means so that a difference between a maximum value and a minimum value of the light source information is minimized. At least one of the plurality of projection display devices includes a plurality of light source means,
8. The multi-projection system according to claim 5, wherein the master device selects a light source unit to be turned on for each projection display device based on the light source information. 9.   The multi-projection system according to claim 8, wherein the master device selects one lighting light source for each of the projection display devices.   The multi-projection system according to claim 8, wherein the master device selects at least two or more lighting light sources for at least one of the projection display devices.   The multi-projection system according to any one of claims 5 to 10, wherein the master device is provided in at least one of the projection display devices. Obtaining light source information relating to the light quantity of the light source means from a plurality of projection display devices provided with light source means;
And a step of controlling the amount of light from the light source means for each of the projection display devices based on the light source information. Obtaining light source information relating to the light quantity of the light source means from a plurality of projection display devices provided with light source means;
A program for causing a computer to execute a step of controlling the amount of light from the light source means for each of the projection display devices based on the light source information.