Claims
- 1. A display apparatus comprising:
- a computer for outputting at least video signals.
- a display unit connectable to said computer for displaying inputted video signals;
- said computer including first communication means for bi-directionally communicating with said display unit in accordance with at least identification information of said display unit; and
- said display unit including second communication means for bi-directionally communicating with said computer in accordance with at least the identification information of said display unit, first memory means for storing at least the identification information of said display unit, and first control means for controlling said second communication means and an internal circuit included in said display unit based upon comparison of at least the identification information from said computer and the identification information stored in said first memory means.
- 2. A display apparatus according to claim 1, wherein said computer further comprises:
- second memory means for storing a plurality of identification information identifying said display unit connectable to said computer;
- second control means for reading said second memory means when switching on a power supply of said display unit connected to said computer, for receiving the identification information sent from the said display unit connected to said computer through said second communication means to said computer, for enabling comparison of the received identification information from said display unit connected to said computer with at least one of said plurality of identification information stored in said second memory means and for enabling bi-directional communication with said display unit upon achieving coincidence, and for transmitting through said first and second communication means control signals for controlling said internal circuit of said display unit.
- 3. A display apparatus according to claim 2, wherein said control signals are transmitted to a power supply circuit of said display unit, and said power supply circuit includes means for switching of said power supply.
- 4. A display apparatus according to claim 1, wherein said computer further comprises:
- second memory means for storing a plurality of identification information identifying said display unit connectable to said computer;
- second control means for reading said second memory means, when switching on a power supply of said display unit connected to said computer, and for receiving transmitted identification information from said display unit connected to said computer through said first communication means, said second control means comparing the received identification information with at least one of the plurality of identification information stored in said second memory means and for transmitting control information through said first communication means to said display unit connected to said computer indicating that the inputted video signals are displayed incorrectly when no coincidence is obtained.
- 5. A display apparatus according to claim 4, wherein said internal circuit included in said display unit is a video blanking circuit having means for performing a blanking operation and means for controlling suppression of video signals to be displayed in accordance with the transmitted control information from said computer.
- 6. A display apparatus according to claim 4, wherein said internal circuit included in said display unit is an oscillation circuit for a deflection circuit, said oscillation circuit oscillating at a frequency different from a scanning frequency of the video signal outputted from said computer and for preventing normal display of the video signal based on the transmitted control information from said computer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
5-022212 |
Feb 1993 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 08/190,848, filed Feb. 3, 1994, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (11)
Number |
Date |
Country |
0612053A1 |
Aug 1994 |
EPX |
37 22 169 A1 |
Jan 1989 |
DEX |
43 36 116 A1 |
May 1994 |
DEX |
61-84688 |
Apr 1986 |
JPX |
1-321475 |
Dec 1989 |
JPX |
2-250576 |
Oct 1990 |
JPX |
3-56931 |
Mar 1991 |
JPX |
3-116093 |
May 1991 |
JPX |
3-261995 |
Nov 1991 |
JPX |
5-46106 |
Feb 1993 |
JPX |
5-232918 |
Sep 1993 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
190848 |
Feb 1994 |
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