Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
1999-02-05
2001-07-31
Hjerpe, Richard (Department: 2674)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S087000
Reexamination Certificate
active
06268844
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a backlight for an LCD (liquid crystal display) monitor, and more particularly, to an improved apparatus and method of displaying a backlight consumption time for an LCD monitor wherein the backlight consumption time is displayed on screen.
2. Description of the Background Art
A conventional LCD monitor has so far provided no particular composition and method for visually displaying its backlight consumption time. Assuming that an average longevity of LCD monitor backlight is around 50,000 hours, an average longevity of the backlight is understood to range from 10,000~25,000.
Theoretically, two to five times should a user replace the backlight in use for an LCD monitor.
Since the conventional LCD monitor is not provided with a device which informs a user of the backlight longevity of an LCD monitor, especially when the backlight is almost used up, there is strongly required such a device for a prior recognition of the backlight longevity.
SUMMARY OF THE INVENTION
The present invention is directed to overcoming the conventional disadvantages.
Therefore, it is an object of the present invention to provide an on-screen display apparatus which informs a user of a backlight replacement time, if the backlight is almost used up, by periodically storing its consumption time in a memory.
To achieve the above-described object, there is provided an on-screen display apparatus of backlight consumption time for an LCD monitor according to the present invention which includes a key input unit, a backlight data processing unit, a power control unit for outputting a driving voltage in response to an output signal of the backlight data processing unit, and a backlight driving unit for receiving a driving voltage from the power control unit and turning on the backlight.
Further, to achieve the above-described object, there is provided an onscreen display method of backlight consumption time according to the present invention which includes a first step for operating a timer when a backlight driving control signal is turned on, counting a backlight consumption time preset in a memory storage unit and storing the counted value in a memory storage unit, a second step for periodically comparing the backlight consumption time stored in the memory storage unit with a preset backlight maximum consumption time, a third step for displaying a backlight replacement instruction message on the screen when the hitherto backlight consumption time exceeds the maximum consumption time according to the determined result in the second step and resetting, after the backlight replacement, the backlight consumption time stored in the memory storage unit using a reset key in the key input unit, and a fourth step for continuously counting the consumption time when the hitherto backlight consumption time does not exceed the maximum consumption time according to the determined result in the second step and storing the counted value in the memory storage unit, and displaying on the screen the hitherto backlight consumption time stored in the memory storage unit when a key signal for displaying is applied to the key input unit.
The features and advantages of the present invention will become more readily apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific example, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
REFERENCES:
patent: 5345392 (1994-09-01), Mito et al.
patent: 5786801 (1998-07-01), Ichise
patent: 6078302 (2000-06-01), Suzuki
Dinh Duc
Hjerpe Richard
LG Electronics Inc.
Ostrolenk Faber Gerb & Soffen, LLP
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