Method and apparatus for controlling monitor using video signal

Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements

Reexamination Certificate

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Details

C345S213000, C345S157000, C345S667000

Reexamination Certificate

active

06320576

ABSTRACT:

CLAIM OF PRIORITY
This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. §119 from my applications entitled METHOD OF CONTROLLING MONITOR USING VIDEO SIGNAL filed in the Korean Industrial Property Office on the May 27, 1997 and there duly assigned Ser. No. P97-20944 by that Office.
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates to a method and arrangement for controlling a display device, and more specifically, to a method of controlling a display device by sampling a video signal (R,G,B) applied by a computer to the display device so as to digitize it, and controlling the display device according to a corresponding signal.
2. Related Art
A monitor is a typical peripheral device for a computer, and is one of the display devices which displays a signal sent from a computer as an image so as to allow a user to recognize it. For satisfactory operation of a monitor, proper synchronous signals and color signals are required. Such signals are typically generated by a video card in a computer with which the monitor is associated, and are transmitted to the monitor. The color signals are typically provided by amplification circuitry to the cathode ray tube (CRT) forming the display device, while the synchronous signals are typically provided to a microcomputer provided in the monitor.
The user is normally provided with the capability of controlling various monitor functions by the use of control knobs located on a portion (usually the front portion) of the monitor. Such knobs are used for controlling the functions of brightness, contrast, and so forth. The greater the number of functions to be controlled, the greater the number of control knobs or keys required on the monitor. If a large number of functions are required, but a limited or small number of keys are provided (sometimes, with an on-screen display), the control knobs or keys have to be pushed several times and an on-screen display (OSD) is separately needed. This produces difficulties and inconvenience in the control of the monitor.
The above problem can be solved to some extent by the employment of a recently developed device, known as a USB device. The USB has the main advantage of simplicity and convenience, and automatically determines information about system resources required for each peripheral device, securing this information to allow the display to use it without interference from the user. However, control of a monitor using the USB can be carried out only in a system employing the USB mode.
Therefore, there is a need for the development of a method of controlling a monitor in which a minimum number of key or control knobs are set on the monitor. Moreover, it will be preferable to develop a monitor which is controlled through a video signal line using computer software without employing an additional communication line.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a method and arrangement for controlling a monitor, in which the minimum number of keys are set on the monitor, and the monitor is controlled through a video signal line using computer software without employing an additional communication line.
To accomplish the object of the present invention, there is provided a method of controlling a monitor, including the steps of counting horizontal and vertical frequencies, setting a sampling point depending on the count result, storing data as to color signals (R,G,B) at the sampling point in a temporary storage, confirming a color signal which informs of initiation of input of a signal for controlling the monitor, and confirming the control signal.


REFERENCES:
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patent: 5539540 (1996-07-01), Spaulding et al.
patent: 5544284 (1996-08-01), Allebach et al.
patent: 5565897 (1996-10-01), Kikinis et al.
patent: 5629780 (1997-05-01), Watson
patent: 5822453 (1998-10-01), Lee et al.
patent: 5852431 (1998-12-01), Ito
patent: 6078361 (2000-06-01), Reddy

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