PROJECTION TYPE DISPLAY DEVICE, DISPLAY SYSTEM, AND DISPLAY METHOD

• US 20170102908A1
• Filed: 12/20/2016
• Published: 04/13/2017
• Est. Priority Date: 03/29/2012
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: ARUGA, Tadanori, YASUDA, Yutaka, KATAHIRA, Toru
• Granted Patent: US 9,760,332 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/1423 controlling a plurality of local displays, e.g. CRT and flat panel display
• CPC Class Codes: G06F 3/1454 involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
• CPC Class Codes: G09G 2320/103 Detection of image changes, e.g. determination of an index representative of the image change
• CPC Class Codes: G09G 2330/12 Test circuits or failure detection circuits included in a display system, as permanent part thereof
• CPC Class Codes: G09G 2340/12 Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
• CPC Class Codes: G09G 2370/04 Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: H04N 21/4122 additional display device, e.g. video projector digital output for controlling a plurality of local displays G06F3/1423
• CPC Class Codes: H04N 2201/0032 where the still picture apparatus acts as the slave
• CPC Class Codes: H04N 9/3147 Multi-projection systems displays in general H04N9/12; video walls G06F3/1446, G09G2300/026

Abstract

A system displays an image using a plurality of projection type display devices, and is capable of reliably notifying a user who uses the system that an error has occurred in a certain projection type display device. A slave includes a display unit that projects and displays an image and a signal receiving unit that receives data transmitted from a commander. The slave includes a detection unit that detects an error in the commander on the basis of the receiving conditions of the data in the signal receiving unit. The slave includes a display control unit that, when an error is detected by the detection unit, makes the display unit display an image showing that the error has been detected.

Claims

1. A projection type display device comprising:

a first display unit that projects and displays an image;

a first signal receiving unit that receives transmission data transmitted from another projection type display device that projects and displays an image, the another projection type display device having a measuring unit that measures a temperature of a first location inside the another type display device;

a first detection unit that detects an error in the other projection type display device on the basis of receiving conditions of the transmission data in the first signal receiving unit; and

a first display control unit that, when the error is detected by the first detection unit, makes the first display unit display a first image showing that the error has been detected

wherein a frequency of transmitting the transmission data increases as the temperature of the first location increases.

2. The projection type display device according to claim 1,

wherein when an error occurs in the other projection type display device, the first signal receiving unit receives error data, which indicates that the error has occurred and which is transmitted from the other projection type display device, as the transmission data, and

the first detection unit detects the error when the first signal receiving unit receives the error data.

3. The projection type display device according to claim 1,

wherein the first signal receiving unit receives first data, which is transmitted from the other projection type display device at a first timing, as the transmission data, and

the first detection unit detects the error when the first signal receiving unit does not receive the first data at a second timing corresponding to the first timing.

4. The projection type display device according to claim 2,

wherein the first signal receiving unit receives first data, which is transmitted from the other projection type display device at a first timing, as the transmission data, and

the first detection unit detects the error when the first signal receiving unit does not receive the first data at a second timing corresponding to the first timing.

5. The projection type display device according to claim 1, further comprising:

a first signal transmission unit that transmits second data to the other projection type display device at a third timing,

wherein the first signal receiving unit receives, as the transmission data, third data that the other projection type display device transmits in response to reception of the second data transmitted from the first signal transmission unit, and

the first detection unit detects the error when the first signal receiving unit does not receive the third data at a fourth timing corresponding to the third timing.

6. The projection type display device according to claim 2, further comprising:

a first signal transmission unit that transmits second data to the other projection type display device at a third timing,

wherein the first signal receiving unit receives, as the transmission data, third data that the other projection type display device transmits in response to reception of the second data transmitted from the first signal transmission unit, and

the first detection unit detects the error when the first signal receiving unit does not receive the third data at a fourth timing corresponding to the third timing.

7. The projection type display device according to claim 4,

wherein the first detection unit detects the error in a first case where the first signal receiving unit does not receive the first data at the second timing corresponding to the first timing and a second case where the first signal receiving unit receives the error data, and

the first display control unit makes the first display unit display different images as the first image in the first and second cases.

8. The projection type display device according to claim 6, further comprising:

a first signal transmission unit that transmits second data to the other projection type display device at a third timing,

wherein the first detection unit detects the error in a first case where the first signal receiving unit does not receive the third data at a fourth timing corresponding to the third timing and a second case where the first signal receiving unit receives the error data, and

the first display control unit makes the first display unit display different images as the first image in the first and second cases.

9. The projection type display device according to claim 1,

wherein the first detection unit detects the error, and the first display unit and the other projection type display device display the images so as to overlap each other.

10. The projection type display device according to claim 1, further comprising:

a first signal transmission unit that, when an error occurs in the projection type display device, transmits error data indicating that the error has occurred to the other projection type display device.

11. The projection type display device according to claim 1, further comprising:

a first signal transmission unit that transmits first data to the other projection type display device at a first timing.

12. The projection type display device according to claim 1,

wherein the first signal receiving unit receives second data transmitted from the other projection type display device at a third timing, and

a first signal transmission unit that transmits third data to the other projection type display device in response to reception of the second data of the first signal receiving unit is provided.

13. A display system comprising:

a first projection type display device; and

a second projection type display device as another projection type display device,

wherein the first projection type display device includes;

a first display unit that projects and displays an image;

a first signal receiving unit that receives transmission data transmitted from another projection type display device that projects and displays an image;

a first detection unit that detects an error in the other projection type display device on the basis of receiving conditions of the transmission data in the first signal receiving unit; and

a first display control unit that, when the error is detected by the first detection unit, makes the first display unit display a first image showing that the error has been detected, and

the second projection type display device includes;

a second display unit that projects and displays an image;

a measuring unit that measures a temperature of a first location inside the second projection type display device; and

a second signal transmission unit that transmits the transmission data to the first projection type display device

wherein a frequency of transmitting the transmission data increases as the temperature of the first location increases.

14. The display system according to claim 13,

wherein the second projection type display device further includes:

a second detection unit that detects an error in the first projection type display device on the basis of receiving conditions of data from the first projection type display device in the second signal receiving unit; and

a second display control unit that, when the error is detected by the second detection unit, makes the second display unit display a second image, which shows that the error has been detected, at a position not overlapping the first image.

15. The display system according to claim 14,

wherein the first projection type display device further includes a first signal transmission unit that transmits second data to the second projection type display device at a third timing,

the second projection type display device further includes a second signal receiving unit that receives the second data transmitted from the first projection type display device at the third timing,

the second transmission unit transmits the third data to the first projection type display device as the transmission data in response to reception of the second data of the second signal receiving unit,

the first signal receiving unit receives third data as the transmission data from the second projection type display device, and

the first detection unit detects the error when the first signal receiving unit does not receive the third data at a fourth timing corresponding to the third timing.

16. The display system according to claim 14,

wherein the first detection unit detects an error in the second projection type display device when the first and second display units display images so as to overlap each other, and

the second detection unit detects an error in the first projection type display device when the first and second display units display images so as to overlap each other.

17. A display method comprising:

making a first projection type display device, which includes a display unit that projects and displays an image and a signal receiving unit that receives transmission data transmitted from another projection type display device that projects and displays an image, detect an error in the other projection type display device on the basis of receiving conditions of the transmission data in the signal receiving unit; and

when an error is detected in the detection, making the display unit display an image, which shows that the error has been detected, on the display unit by the first projection type display device

wherein the another projection type display device has a measuring unit that measures a temperature of a first location inside the second projection type display device and a frequency of transmitting the transmission data increases as the temperature of the first location increases.