JPH0527748A - Screen display position control circuit - Google Patents

Abstract

PURPOSE:To move a picture up and down, and right and left so that a picture which is displayed firstly in the center of a screen is not hidden behind a picture which is displayed next. CONSTITUTION:Pulses from an automatic sweep control circuit 2 are passed or cut off by switching elements 3f or 3i according to the operation of an operation part 3A for movement such as keys and a mouse. A display control part 1A inputs the passed pulses and sends an instruction to an on-screen control circuit 1 which shifts the display picture in position according to the pulses.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen display position control circuit for displaying an image on a screen on a display device.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing a conventional circuit of this type. In the figure, reference numeral 1 is an on-screen control circuit, and the on-screen control circuit 1 receives a selection signal 5a from a key input section 5. The image data stored in advance in the storage means 4 is selected and extracted, an image display control signal is created and output to a display device such as a CRT, a liquid crystal display, a plasma display, etc., and the screen is almost at the center of the screen. To display.

[0003]

FIG. 3 shows an example of the image 7 displayed on the screen 6. However, although it is proposed that the image 7 is enlarged or reduced based on the input control of the key input unit 5, the screen is moved up and down.
I couldn't move left or right. Therefore, if the on-screen control circuit has previously set the image 7 to be displayed near the center of the screen, the image 7 will be displayed.
However, there is a drawback that the image 8 previously displayed is hidden in the center of the screen. In order to display the image 7 at a position distant from the image 8 so that the image 8 is not hidden, that position must be set in the on-screen control circuit 1 in advance, and the setting work is troublesome. ..

The present invention has been made to solve the above-mentioned problems, and a screen display position where the image previously displayed in the center of the screen can be moved vertically and horizontally so as not to be hidden. The purpose is to obtain a control circuit.

[0005]

A screen display position control circuit according to the present invention includes an automatic sweep control circuit for outputting a pulse for moving an image, a moving operation unit such as a key and a mouse, and this moving operation unit. Based on the switch means, which comprises a switching element for passing or blocking the pulse from the automatic sweep control circuit, and a display position control for instructing the on-screen control circuit to shift the position of the display image based on the pulse passing through the switch means. It consisted of departments.

[0006]

In the screen display position control circuit according to the present invention, the pulse from the automatic sweep control circuit is passed or blocked by each switching element in conjunction with the moving operation unit, and the display position control unit passes the pulse. The shift position is instructed to the on-screen control circuit based on the pulse.

[0007]

1 shows an embodiment of a screen display position control circuit according to the present invention. The same parts as those in FIG. 2 are designated by the same reference numerals and the description thereof will be omitted. The key input section 5 includes an up / down movement key 3
A moving operation portion 3A including a and 3b and left and right moving keys 3c and 3d is provided, and the moving keys 3a to 3 are provided.
Switching elements 3f to 3i that pass or block the pulse from the frequency dividing circuit 2e are provided in conjunction with d. Each pulse from each switching element 3f to 3i is input to the display position controller 1A. A clock pulse from the clock pulse generator 2j is input to the frequency dividing circuit 2e, and the frequency dividing circuit 2e divides the frequency to form the automatic sweep control circuit 2. Also, up / down and left / right movement keys 3
a to 3d and switching elements 3f to 3i,
The switch means 3 is configured. 1A is a display position control unit that instructs the on-screen control circuit 1 to shift a display image.

The operation is as follows. With the above configuration,
For example, when the upward movement key 3a is pressed, the switching element 3f is turned on during that period to output the pulse (for upward movement) divided by the frequency dividing circuit 2e, and the display position control section 1A is based on the on-screen. The control circuit 1 is instructed to shift the display image upward. The on-screen control circuit 1 moves the image selected by the selection signal 5a and initially displayed in the center only while the up movement key 3a is turned on. In this way, the display image can be shifted from the center by a desired amount in the vertical and horizontal directions by operating the moving operation unit 3A. The speed of shift corresponds to the period of the pulse.

The image displayed on the first screen is not limited to being displayed at the center of the screen, but may be displayed at the end of the screen and shifted from this to a desired position. The moving operation unit 3A may be configured with a mouse or the like.

[0010]

According to the present invention, an automatic sweep control circuit for outputting an image moving pulse to the screen display position control circuit, a moving operation unit such as a key and a mouse, and an automatic sweeping control circuit based on the moving operation unit. From the switch means composed of a switching element for passing or blocking the pulse from the sweep control circuit, and the display position control section for giving an instruction to the on-screen control circuit to shift the position of the display image based on the pulse passing through the switch means. Since it is configured, it is possible to move the image vertically and horizontally by operating the moving operation unit so that the image previously displayed in the center of the screen is not hidden, and it is not necessary to repeat the setting work to obtain the desired display position. Work efficiency is improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a screen display position control circuit according to the present invention.

FIG. 2 is a block diagram showing an example of a conventional screen display position control circuit.

FIG. 3 is a diagram showing an example of an image displayed on a screen.

[Explanation of symbols]

 1 on-screen control circuit 1A display position control section 2 automatic sweep control circuit 3 switch means 3A moving operation section 3f, 3g, 3h, 3i switching element 4 storage means 5 key input section

Claims (1)

Claim: What is claimed is: 1. A screen display position control circuit comprising an on-screen control circuit adapted to display an image read out from a storage means at a predetermined position on the screen of a display device, wherein an image moving pulse is supplied. Automatic sweep control circuit to output,
A switch, which comprises a moving operation part such as a key or a mouse, and a switching element which passes or blocks a pulse from the automatic sweep control circuit based on the moving operation part;
A screen display position control circuit comprising: a display position control section for instructing an on-screen control circuit to shift the position of a display image based on a pulse passing through the switch means.