KR930022877A - How to control screen vertical movement and vertical movement of HDTV receiver - Google Patents

Abstract

In the present invention, the user performs a zoom mode operation in which an HDTV (high definition TV) receiver displays an image signal having a screen aspect ratio of 3: 4 on a screen having an aspect ratio of 9:16. The present invention relates to a screen vertical shifting device and a method of controlling the vertically shifted position for viewing. According to the conventional screen vertical shifting device, since the vertical synchronization delay is performed by the multivibrator, the delay step and time cannot be fixed. This is to solve the problem that the viewer cannot select the viewable area of the 4 screens, and the noise caused by the synchronization conversion and the deterioration of image quality are caused.

The present invention enables accurate control of the screen vertical movement amount by setting the up / down movement amount of the screen in response to the user's key operation and counting the set movement amount as a clock to delay the vertical synchronization signal by a count value. It is easy to arbitrarily adjust and to prevent the deterioration of image quality by excluding noise accompanying synchronous conversion. It is applied to HDTV.

Description

How to control screen vertical movement and vertical movement of HDTV receiver

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

(A) and (b) of FIG. 1 are diagrams showing screen vertical movement states according to synchronization signal delay, FIG. 2 is a block diagram of a screen vertical movement apparatus of the present invention, and FIG. 3 is a screen vertical movement control of the present invention. The flowchart of the method, Figure 4 (a) and (b), is a vertical synchronization signal timing diagram in accordance with the present invention.

Claims (4)

A key operation unit 1 including a screen vertical movement key, a microcomputer 2 for increasing / decreasing the screen position movement amount in response to the key operation signal, and outputting the increased / decreased data as the movement amount setting information; The data output unit 3 converts the output data into parallel data and temporarily stores the data, and downloads the output data, counts the horizontal synchronization signal H.sync as a clock, and converts the vertical synchronization signal V.sync to the set movement amount data. Screen vertical moving device of the HDTV receiver comprising a counter (4) for delaying by a delay and outputting to the CPT deflection unit (5). The data output section (3) according to claim 1, wherein the data output section (3) includes a shift register (3A) for converting the output data into parallel data by the microcomputer (2), and a buffer (3B) for temporarily storing the parallel data and supplying it to the counter (4). Screen vertical movement device composed of HDTV receiver. When the screen position vertical movement key of the key operation unit 1 is operated, the process of increasing / decreasing the screen position movement amount corresponding to the operated key when the current screen display is the zoom mode, and the increase / decrease of the movement amount of the screen position ends. If the control screen vertical movement of the HDTV receiver comprising the step of outputting the increased / decreased data as moving amount setting information and downloading it to the counter (4). The method of claim 3, further comprising increasing / decreasing the screen position movement amount within a range within an upper / lower limit by setting an upper limit and a lower limit value of the screen position movement amount. ※ Note: The disclosure is based on the initial application.