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On delay device for a visual display unit
| Details |
Inventors: Weissbrod, Holger; Drewer-Gutland, Heiner; Hehemann, Heinrich;
Assignee: Wincor Nixdorf GmbH & Co. KG (Paderborn, DE)
Primary Examiner: Hofsass; Jeffery
Assistant Examiner: Tang; Son M.
Attorney, Agent or Firm: McCormick, Paulding & Huber LLP
The invention describes a turn-on delay device (10) for a visual display unit (14) which can be placed into an idle state by disabling at least one signal (H-SYNC IN, V-SYNC IN) controlling the visual display unit (14). The turn-on delay device contains, amongst other things, a disabling device (42, 44, 46) which disables the signal (H-SYNC IN, V-SYNC IN) for a predetermined delay period. When the delay period has elapsed, the signal (H-SYNC IN, V-SYNC IN) is supplied to the visual display unit (14). |
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DETAILED DESCRIPTION EP-A0 678 843 discloses a method of deactivating a visual display unit in which the visual display unit can be placed into the idle state by disabling at least one signal controlling said visual display unit, the signal produced by a control device being disabled for a predetermined delay period.
The object of the invention is to specify a device which can minimize the risk of a user who is misguided by the computer system's system messages causing the computer system to fail.
The invention achieves this object with a turn-on delay device for a visual display unit which can be placed in an idle state by disabling at least one signal controlling the visual display unit.
The turn-on delay device contains at least one input which is connected to a control device supplying the signal to it, a disabling device which disables the signal for a predetermined delay time, and at least one output which is connected to the visual display unit and supplies the signal to the latter when the delay time has elapsed.
Modern visual display units generally have a so-called energy-saving function which ensures that the visual display units go blank if one or more control signals are absent.
Functioning as control signals are usually a horizontal sync signal and a vertical sync signal, which are produced by a control device in a computer, e.
g.
a graphics card, and coordinate the movement of an electron beam in the visual display unit's picture tube, with the horizontal sync signal controlling the horizontal flyback and the vertical signal controlling the vertical flyback of the electron beam as the screen is set up.
It is now a provision of the invention that, connected between the computer's control device and the visual display unit, there is a turn-on delay device which blocks the control signals for a predetermined delay time when the computer is started, so that the screen of the visual display unit is blank while the operating system is loaded, and the system messages which are otherwise displayed on the screen are not displayed
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