DISPLAY DEVICE, USAGE MANAGEMENT METHOD AND PROGRAM OF A DISPLAY DEVICE

• US 20170318286A1
• Filed: 12/03/2014
• Published: 11/02/2017
• Est. Priority Date: 12/03/2014
• Status: Active Grant

• Current Assignee: Sharp NEC Display Solutions, Ltd.
• Original Assignee: NEC Display Solutions, Ltd. (NEC Corporation)
• Inventors: YOSHINO, Michio, KOBAYASHI, Masakazu
• Granted Patent: US 10,404,977 B2
• Time in Patent Office: Days
• CPC Class Codes: G06Q 30/0645 Rental transactions; Leasing transactions
• CPC Class Codes: G09G 2330/022 in absence of operation, e.g. no data being entered during a predetermined time
• CPC Class Codes: G09G 2330/026 Arrangements or methods related to booting a display
• CPC Class Codes: G09G 2330/027 Arrangements or methods related to powering off a display
• CPC Class Codes: G09G 2370/22 Detection of presence or absence of input display information or of connection or disconnection of a corresponding information source
• CPC Class Codes: G09G 5/00 Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators image data processing or generation, in general G06T
• 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 17/004 for digital television systems
• 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 9/3182 Colour adjustment, e.g. white balance, shading or gamut white balance per se H04N9/73; control of amplitude of colour signals H04N9/68; colour control circuits for displays in general G09G5/02, G09G3/2003, G09G3/3607
• CPC Class Codes: H04N 9/3191 Testing thereof testing of displays in general G09G3/006
• CPC Class Codes: H04N 9/3194 including sensor feedback

Abstract

Provided is a display device that has a usage validity period and confirms that the device is within the usage validity period when it is used, and can be improved in usefulness and can be used quickly, as well as a usage management method and program for the display device. The display device includes: a real-time clock; and, a control unit that, upon receiving a video display-ON signal for turning on video display under the condition that the status of the real-time clock is invalid, displays video corresponding to an input video signal.

Claims

1. A display device comprising:

a real-time clock; and

,

a control unit that, when receiving a video display-ON signal for turning on video display under the condition that the status of the teal-time clock is invalid, displays video corresponding to an input video signal.

2. The display device according to claim 1, wherein

the control unit synchronizes an acquired secure clock with the real-time clock, and confirms whether or not the usage validity period of the display device has expired based on the output from the real-time clock.

3. The display device according to claim 2, wherein

when the status of the real-time clock is valid and has been synchronized with the secure clock and the usage validity period has not expired, the control unit, upon receiving the video display-ON signal, displays the video corresponding to the input video signal.

4. The display device according to claim 3, further comprising a storage, wherein

the control unit records information indicating expiration of the usage validity period after the usage period has expired

5. The display device according to claim 4, further comprising a video processor, wherein

when the status of the real-time clock is invalid while the storage has information indicating expiration of the usage validity period, the control unit will not activate, at least, the video processor even if the video display-ON signal is received.

6. The display device according to claim 4, wherein

the control unit records information indicating expiration of the usage validity period when having been unable to acquire the secure clock for a first period of time or longer.

7. The display device according to claim 1, wherein

when the display device is supplied with power, the control unit confirms the status of the real-time clock.

8. The display device according to claim 1, wherein

if the usage validity period expires while video corresponding to the input video signal is being displayed, the control unit continues displaying the video corresponding to the input video signal.

9. The display device according to claim 1, wherein

when the date and time shown by the real-time clock have not elapsed a second predetermined period of time or longer from the initial value of date and time, the status of the real-time clock is invalid.

10. The display device according to claim 9, wherein

the second period of time is equal to or longer than the time required to confirm the status of the real-time clock after the supply of power to the display device is started.

11. A usage management method implemented in a display device including a real-time clock, wherein

when receiving a video display-ON signal for turning on video display under the condition that the status of the real-time clock is invalid, a control unit displays video corresponding to an input video signal.

12. A machine-readable media which is non-transitory tangible media for use in a display device including a real-time clock, causing a control unit to enable display of video corresponding to an input video signal when the control unit receives a video display-ON signal for turning on video display under the condition that the status of the real-time clock is invalid.