Television – Basic receiver with additional function – For display of additional information
Reexamination Certificate
1998-05-27
2001-10-23
Lee, Michael (Department: 2614)
Television
Basic receiver with additional function
For display of additional information
C348S056000, C348S177000, C348S180000, C348S184000, C348S189000, C345S111000, C345S111000
Reexamination Certificate
active
06307596
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates to a circuit and method for indicating an image adjustment pattern using an on-screen display (OSD), and more particularly to a circuit and method for voluntarily indicating an image adjustment pattern in a standard mode, using OSD built into a display.
2. Related Art
Generally, a display with which a microcomputer is used adjusts an image in production, and then stores it in a memory. Using the image data kept in the memory, a signal input outside the display is analyzed, and video information in accordance with the result analyzed is compensated for and displayed on a screen.
Prior arrangements are burdened by a problem which arises when servicing away a display is required during its use. Once services is performed and the problem is eliminated, the image displayed after removing the problem must be adjusted. This is particular true when the microcomputer and display unit is replaced, and that new image adjustment data must be input thereto. Such input of new image adjustment data requires a signal generator to be utilized to produce an image adjustment pattern which is then applied to the display unit to adjust the image displayed on the cathode ray tube (CRT) thereof.
If there is no signal generator, present or available for generating an image adjustment pattern, then the image displayed on the display unit is controlled using an image adjustment pattern produced in the main computer. However, an image controlled in this manner can not be all-mode saved in the microcomputer. Thus, without a signal generator, image adjustment can be implemented.
Therefor, there is a need for the development of a circuit and method for indicating an image adjustment pattern using an on-screen display(OSD). In particularly, there is a need for development of a circuit or method for indicating an image adjustment pattern using a free running frequency for representing a check signal cable in an OSD function of a display.
SUMMARY OF THE INVENTION
Therefore, in order to overcome such drawbacks of the prior art, an objective of the present invention is to provide a circuit and method for indicating an image adjustment pattern using a free running frequency for representing a check signal cable in OSD function of a display.
To accomplish the objective of the present invention, there is provided a circuit for indicating image adjustment pattern using OSD, comprising: a microcomputer which, if there is no externally input signal, generates a free running frequency, or converts the free running frequency into a standard mode frequency according to a key signal applied from a key panel, and generates video data according to the frequency converted; an OSD control circuit for receiving the frequency output from the microcomputer, and generating an OSD gain signal in accordance with a signal cable check request and an image adjustment pattern OSD gain signal for indicating the image adjustment pattern according to the frequency applied; a signal processing circuit for receiving and processing the video data according to the frequency generated from the microcomputer, and thus outputting a video signal; and a video mixer for mixing the video signal output from the signal processing circuit and the OSD gain signal selectively output from the OSD control circuit, and for outputting a signal cable check request video signal and image adjustment pattern video signal.
For another aspect of the present invention, there is provided a method of indicating an image adjustment pattern using OSD, comprising the steps of: (a) inputting a key signal for frequency mode conversion; (b) generating a free running frequency if there is no external input signal; (c) converting the free running frequency generated in step (b) into a standard mode frequency according to the key signal selected in step (a); (d) controlling steps (b) and (c) according to the presence or absence of the key signal output from step (a), in order to determine the output of the free running frequency and standard mode frequency; (e) generating an OSD gain signal in accordance with signal cable check according to the free running frequency output from step (d); (f) generating an OSD gain signal in accordance with an image adjustment pattern according to the standard mode frequency output from step (d); and (g) receiving the frequency output from step (d), controlling steps (e) and (f), and determining whether or not to generate the OSD gain signal in accordance with cable check and the OSD gain signal and in accordance with the image adjustment pattern.
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Bushnell , Esq. Robert E.
Lee Michael
Lo Linus H.
Samusung Electronics Co., Ltd.
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