JPS6348977A - Superimpose display position controller - Google Patents

Abstract

PURPOSE:To easily adjust the display position of a superimposed picture and character or the like by transferring a display position control signal from the external part of a TV receiver to an internal control signal generating part and a character generating part and storing in the memory device of the control signal generating part. CONSTITUTION:The data of the horizontal display position is fed to a character generating part 25 from a display position controller 3, the generating part 25 receiving the data counts from the post edge of a horizontal synchronizing signal, outputs the relevant picture and character display data when a specified count is completed, superimposes on a master picture in a switching part 23 and displays on a CRT26. When an optimum display position on the screen of the CRT26 is decided, the decided display position data is transferred to the control signal generating part 24 from the controller 3 and this data is stored in the memory device in the generating part 24. This display data is read according to the necessity and applied to the generating part 25, thereby, the display can be constantly set to the optimum position.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a superimpose display position control device for easily and automatically adjusting the display position when displaying pictorial and textual information on a screen.

BACKGROUND OF THE INVENTION In recent years, television receivers have been equipped with a function to superimpose picture and text information such as channel numbers and volume adjustment levels on the same screen as the parent image.

The superimposition method will be explained below with reference to the drawings.

In FIG. 2, a video signal input from an antenna 1 is tuned to a specific channel by a channel selection unit 21 disposed in a television receiver 2, and a video signal processing unit 22 converts the video signal into three primary color signals R,
The signal is converted into G and B and becomes one input to the switching section 23. or,
For example, when a control signal for displaying a channel number is generated from the control signal generating section 24 to the character generating section 25, a picture/character signal of the corresponding channel number is generated from the character generating section 25.
It is output as a primary color signal and is used as the other input of the switching section 23. Then, the switching section 23 cuts out the parent signal only for the part where the pictorial/character signal exists, and displays it on the CRT 26.

The display timing of the picture/character display signal is activated by the horizontal/vertical interval 1υ] signal of the parent signal.

Activation when displaying a picture/character signal is normally started by counting the circuit outlined in the character generating section 26 from the edge after the sync signal pulse to 7cm/character surface water level 1'. (not shown), and the display starts when the specified count is reached, but due to variations in cents and parts, etc., the display may be displayed in a position different from the design intention (in this case, the horizontal position). The display position is adjusted to a predetermined position by adjusting the pulse width adjustment volume 28 of the pulse width expansion/contraction circuit 27.

Problems that the invention attempts to solveHowever, recent television receivers have become more compact and
Due to the high degree of integration, the position of the adjustment volume is not necessarily in a location that is easy to adjust, and the adoption of chip components makes it difficult to mount the adjustment volume on a board.

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a superimpose display position t1j control device that facilitates control of picture/character display positions.

Means for Solving the Problem To achieve this object, the superimposed display position control device of the present invention converts a display position control signal from outside the television receiver into a control signal generating means and a character generating means inside the television receiver. A path line for data exchange is provided for data transfer to the control signal generating means, and the transferred data is written to the control signal generating means.
It is configured to have a storage means.

According to the present invention, the display position of the superimpose is adjusted by sending the stored data to the character generating means, so the superimposition can be performed without using a pulse width expansion/contraction circuit or an adjustment volume. It becomes possible to adjust the pose display position, and automatic adjustment is also possible by providing a position sensor on the CRT screen.

Example An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a superimpose display position control device in one embodiment of the present invention.

The parent image display method has already been explained with reference to FIG. 2, so it will be omitted here.

The display position control device 3 is located outside the television receiver 20 and is connected to a control signal generating section 24 and a character generating section 25 inside the television receiver 2o through lot lines 29a and 29b. Data on the horizontal display position is sent from the display position control device 3 to the character generation section 25, and the character generation section 26 receives this data.
counts from the rear edge of the horizontal synchronizing signal, outputs the corresponding picture/character display data at the end of the specified count, superimposes it with the parent image in the switching section 23, and displays it on the CRT 26. Check the pictures and characters displayed on the CRT 26, and if further adjustments are necessary, repeat the above adjustments. Automatic adjustment of the display position is also possible by providing the position sensor 4 in the CRT 26 and returning the display position to the display position control device 3.

Once the optimal display position on the CRT screen is determined, the display position $
From control device 3! The determined display position data is transmitted to the tr control signal generation section 24, and this data is transmitted to the control signal generation section 2.
4 is stored in the internal storage means. .

This display position data is read out as needed by the character generation unit 2.
6, the display can always be set at the optimal position.

Although not specifically stated, the data stored in the storage means of the control signal generation unit 24 can be stored in a non-volatile memory or by a battery backup method even when the power of the television receiver is turned off. , is held.

Effects of the Invention As described above, according to the present invention, the display position of pictures, characters, etc. superimposed on the parent image can be easily adjusted from outside the television receiver, and the number of circuit components can be reduced and automatic adjustment can be achieved. This makes it possible to reduce costs.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a superimpose display position control device according to one embodiment of the present invention, and FIG. 2 is a block diagram of a conventional superimpose display position control device. 1... Antenna, 3... Display position control device, 4... Position sensor, 20... Television receiver, 21... Tuning section, 22...
・Video signal processing unit, 23...Switching unit, 24...
... Control signal generation section, 26 ... Character generation section, 26 ... CRT, 29a, 29b ...
··Path line. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
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Claims (1)

[Claims] It has a function to display both pictorial and textual information on the same screen as the main image, as necessary, and uses a display position control signal from outside the TV receiver to determine the display position of the pictorial and textual information. A superimpose display position control device comprising means for transferring data to control signal generating means and character generating means in the television receiver, and wherein the control signal generating means has means for storing the data.