Television – Image signal processing circuitry specific to television – With details of static storage device
Reexamination Certificate
1998-11-23
2001-12-04
Eisenzopf, Reinhard J. (Department: 2614)
Television
Image signal processing circuitry specific to television
With details of static storage device
C348S659000, C348S660000, C348S662000, C345S156000, C345S182000
Reexamination Certificate
active
06327005
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a display device and method in a digital TV.
2. Discussion of the Related Art
Generally, the display processor of a digital TV receives a decoded Moving Picture Expert Group 2 (MPEG2) video data and provides viewers a variety of image choices through functions such as multiple picture, zoom, on-screen display, color coordinate converting, look-up table (LUT), and the like. Particularly, the LUT has color tables for Red (R), Green (G), Blue (B) and can convert an input signal into an output signal of a different format. For example, the LUT can output the input signal in the format received, invert and output the input signal, or output a reduce number of input signal levels, thereby allowing a variety forms of display. The LUT can also elevate the signal level of the received video signal to brighten the signal if the video signal is too dark, or adjust the signal levels of the RGB color signals to correct the white balance.
To provide the above functions, the LUT processes the input signals in parallel for a faster rate of signal processing. However, a parallel signal processing requires a data bus over 8 bits as well as addresses and control signals ranging 10~20 bits each. Thus, the LUT for parallel signal processing approximately requires input/output pins over 30 bits, resulting in a complicated hardware and economical inefficiency.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to solve at least the problems and disadvantages of the related art.
An object of the present invention is to reduce the necessary hardware in the display device and method of a digital TV.
Another object of the present invention is to provide a display device and method of a digital TV with an improved real time operation speed.
A further object of the present invention is to provide a display device and method of a digital TV which can consistently maintain a display quality.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and advantages of the invention may be realized and attained as particularly pointed out in the appended claims.
To achieve the objects and in accordance with the purposes of the invention, as embodied and broadly described herein, the display device and method in a digital TV employs at least two LUTs, wherein one is operative in a read mode and the other is operative in a write mode. By utilizing at least two LUTs, data can be efficiently converted to allow a stable real time display of the data in the LUT.
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patent: 5565931 (1996-10-01), Girod
patent: 5838389 (1998-11-01), Mical et al.
patent: 5909254 (1999-06-01), Feig et al.
patent: 5936683 (1999-08-01), Lin
patent: 5963263 (1999-10-01), Shyu
patent: 6052157 (2000-04-01), Weihs
patent: 6075514 (2000-06-01), Ryan
Eisenzopf Reinhard J.
LG Electronics Inc.
Yenke Brian P.
LandOfFree
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