KR950002429A - On-screen Display Apparatus and Method of Optical Screen Television Receiver - Google Patents

Abstract

The present invention provides an on-screen display apparatus and method for an optical screen television receiver capable of displaying on-screen character information such as channel, time, date, and telephone number so as not to overlap with a narrow screen video signal on the screen of the optical screen television receiver. It is about. To this end, the present invention provides an image compression unit having a line memory for compressing the horizontal axis of the narrow screen image signal at a predetermined ratio, an on-screen processing unit for generating an on-screen text signal for on-screen text and numbers; A timing signal generator for controlling the image compression unit and the on-screen processing unit so that the output periods of the compressed narrow screen image signal from the image compression unit and the on-screen text signal from the on-screen processing unit do not overlap within the horizontal scanning period, By narrowing the narrow screen video signal and the on-screen text signal compressed within the horizontal scanning period, the narrow screen video and the on-screen text are displayed separately on the left and right sides of one screen.

Description

On-screen Display Apparatus and Method of Optical Screen Television Receiver

Since this is an open matter, no full text was included.

4 is a block diagram of an on-screen display device of an optical screen television set according to an embodiment of the present invention, FIGS. 5A to 5G are output waveform diagrams of respective parts of the on-screen display device, and FIG. A screen state diagram of an image signal and an on-screen information having an aspect ratio of 3: 4 displayed on a screen of an optical screen television receiver, and FIG. 7 is a flowchart of an on-screen display method of an optical screen television receiver according to an embodiment of the present invention.

Claims (8)

Image compression means having a line memory for compressing the horizontal axis of the narrow screen video signal at a predetermined ratio, on-screen processing means for generating on-screen text signals for on-screen characters and numbers, and from the image compression means Mixing means for mixing the compressed narrow screen image signal of the on-screen processing means and the on-screen text signal from the on-screen processing means, the reading period of the line memory included in the image compression means, and the on-screen text of the on-screen processing means. And on-screen display means for controlling the image compression means and the on-screen processing means so that the output period of the signal does not overlap within the horizontal scanning period. The on-screen display of an optical screen television set according to claim 1, wherein said on-screen text signal has a predetermined logic arranged in a time division manner. 3. The color signal generating means according to claim 2, wherein the mixing means generates color signals for generating a color signal for displaying a predetermined color on the screen, and generates the first color signal according to a logic state of the on-screen text signal from the on-screen processing means. And a control switch element for switching the color signal from the means and the compressed narrow-screen video signal from the screen compression means. 4. The method of claim 3, wherein the second screen is connected between the screen compression means and the control switch element in a horizontal scanning period in which there is no compressed narrow screen image signal from the screen compression means under the control of the screen division means. And a background color inserting means for inserting a color signal to provide a background color of the on-screen letters and numbers. 5. The apparatus of claim 4, wherein the background color inserting means comprises: second color signal generating means for generating the second color signal, output of the second color signal generating means and output of the screen compression means under the control of the screen dividing means; And a second control switch element which selects and transmits the selected signal to the control switch. 4. The narrow screen according to claim 1 or 3, wherein the read start time of the line memory is matched with the start time of a horizontal scan period and the output start time of the on-screen character signal is matched with the read end time of the line memory. An on-screen display device of an optical screen television set, characterized in that the image and on-screen characters are displayed on the left and right sides of the optical screen. Compressing the horizontal axis of the narrow screen video signal at a predetermined ratio, generating an on-screen text signal in the form of a video signal for characters and numbers to be displayed on the screen, and the compressed narrow screen video signal and the on On-screen display of an optical screen television receiver having a screen arrangement process for arranging screen text signals so as not to overlap within a horizontal scanning period so that compressed narrow screen video signals and on screen text signals are separately displayed on one screen. How to display. 8. The screen arrangement process according to claim 7, wherein the screen arrangement process includes a process in which the first portion of the narrow screen video signal coincides with the start point of the horizontal scanning period so that the compressed narrow screen video signal is displayed on the left side of the screen. On-screen display method of an optical screen television set. ※ Note: The disclosure is based on the initial application.