Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
1998-06-22
2001-10-23
Hjerpe, Richard (Department: 2674)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S905000, C348S794000
Reexamination Certificate
active
06307530
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 application entitled Lcd Monitor Having Partitioned Circuit Section filed in the Korean Industrial Property Office on Jul. 1, 1997 and there duly assigned Ser. No. U97-17381 by that Office.
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention generally relates to an LCD (liquid crystal display) monitor having a liquid crystal panel on which a picture is displayed according to video signals externally applied. More particularly, the present invention relates to an LCD monitor improved to prevent a failure or malfunction caused by the heat generated from a circuit section employed therein.
2. Related Art
In general, an LCD monitor includes a liquid crystal panel on which a picture is displayed and has such a construction that the liquid crystal panel is mounted in a space defined by the front and rear cases of the monitor. The liquid crystal panel is structured in the form of a panel thinner than the cathode ray tube, and thus the whole width (thickness) of the display section (composed of front and rear cases) is relatively thin in the LCD monitor.
The space given in the display section for mounting a circuit section is so small that it is inadequate to discharge heat generated from the circuit section.
Thus, the LCD monitor employs a heat exhaust device to effectively discharge the heat generated from the circuit section, or any structure for the same purpose.
An LCD monitor, and especially a compact LCD monitor, has a structure that cannot have a heat exhaust device. For that reason, the heat exhaust structure has numerous heat exhaust holes in the case.
However, such heat exhaust holes are unsatisfactory to discharge the heat effectively in an LCD monitor that has a small space for the circuit section because the circuit board is mounted in a very small space, and the board forming the circuit section is disposed in close vicinity to the case or the liquid crystal panel.
When a large space for the circuit section is provided in the display monitor, another problem arises in that the thickness of the display section becomes larger.
A compulsory ventilation arrangement may be used to solve the problem in exhausting the heat out of such a small space for the circuit section, but that involves the use of a motor that increases the unit cost and causes noise.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an LCD monitor having a partitioned circuit section wherein the circuitry generating heat is separated from the other circuitry and is adequately disposed in harmony with a liquid crystal panel and an audio board.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, an LCD monitor having a partitioned circuit section includes: an interface board receptive to video and sync signals generated by a computer; a main printed circuit board (PCB) for processing the video and sync signals received from the interface board, and for displaying the video signals on a liquid crystal panel; a power PCB for rectifying an alternating current (AC) into a direct current (DC) to supply a DC drive voltage to the main PCB and the audio PCB, the power PCB being disposed separate from the main PCB at a specified distance to prevent beat generated in the DC supply from causing a failure or malfunction of components in the main PCB; and an invertor PCB for converting the DC supplied by the power PCB to AC.
In another aspect of the present invention, the power PCB separated from the main PCB is disposed on the side of an invertor section in the liquid crystal panel.
In still another aspect of the present invention, the power PCB is mounted so as to be different in height from the main PCB, and the main PCB is disposed in the vicinity of a rear case having a heat exhaust hole for the prevention of overheating.
REFERENCES:
patent: 5583529 (1996-12-01), Satou
patent: 6020867 (2000-02-01), Shimada et al.
Bushnell , Esq. Robert E.
Eisen Alexander
Hjerpe Richard
Samsung Electronics Co,. Ltd.
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