JPH0631821Y2 - Image display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image display device.

[Prior Art and its Problems] Conventionally, a small and portable television receiver using a dot display type liquid crystal display device has been realized, but such a television receiver has only one display screen. Is.
However, there are times when I want to see multiple screens at once, and some television receivers that use a cathode-ray tube display another screen in a small size in one screen, but hide it in a small screen. Since the part that is displayed is not displayed at all, there is a problem that you cannot know what is displayed only in this part.

On the other hand, some video tape recorders display the still image on the cathode ray tube by playing it back with the tape feeding stopped, but when this still image is displayed, the moving image cannot be displayed and the still image is not displayed. There is a problem that inconvenience occurs when, for example, a sports form is studied in comparison with a moving image.

[Purpose of Invention] The present invention has been made in view of the above-mentioned circumstances. The purpose of this invention is to compare a moving image and a still image simultaneously over the entire screen without hidden parts. An object of the present invention is to provide an image display device capable of performing.

[Points of Invention] In order to achieve the above-mentioned object, the point of this invention is to use a plurality of image display means to display a moving image and a still image in which a specific portion of this moving image is selected. To do.

[Structure of the Embodiment] FIG. 1 is a perspective view of the external appearance of an image display device. In FIG. 1, reference numeral 1 is the main body of the image display device. 2 is provided so that it can be folded inward at the center. This body 1
Dot display type LC (liquid crystal display) panels 3 and 4 are provided above both sides of the bent portion 2 on the front surface, and a tuning indicator 5 is provided below the LC panel 3 for moving images. , This tuning indicator 5
A tuning-in key 6 is provided below. The tuning key 6 is for switching the tuning channel up and down. A sound emitting portion 8 is provided further below the tuning key 6, and an antenna 7 is provided at the right end of the upper surface of the main body 1.

A stop key 9 and a clear key 10 are provided below the still image LC panel 4. Stop key 9
Is for selecting and designating the image data for which a still image is to be displayed for the moving image displayed on the moving image LC panel 3, and the clear key 10 is for selecting the still image displayed on the still image LC panel 4. It is for clearing.

FIG. 2 shows the entire circuit of the image display device. The television radio waves received and collected by the antenna 7 are tuned and tuned by the tuner 11, and the television circuit 12 extracts an image signal containing moving image information of an image. This image signal is displayed on the moving picture LC panel 3 through the moving picture LC driver 14 via the A / D converter 13.

Further, the image data from the A / D converter 13 is always written in the image memory 16 via the transfer gate T1, and at this time, the still image control unit 17 sends the image data to the image memory 1.
A write command signal and write address data are given to 6. When the operation signal of the stop key 9 is given to the still image control unit 17, the output of the opening signal from the still image control unit 17 to the transfer gate T1 is stopped, and new writing of image data to the image memory 16 is performed. The image data in the image memory 16 is stopped and stored as it is, and an opening signal is given from the still image control unit 17 to the transfer gate T2.
The read command signal and the read address data are given to 6, and the image data written before the transfer gate T1 is closed is repeatedly read from the image memory 16, and the still image LC driver 15 is read through the transfer gate T2. A still image is displayed on the still image LC panel 4 through. The audio signal from the television circuit 12 is emitted from the speaker 23 via the amplifier 22.

FIG. 3 shows a specific structure within the chain line of FIG. 2. In the A / D converter 13, the image signal from the television circuit 12 corresponds to 4 bits and 16 gradations corresponding to the brightness level. The data is converted into image data, taken into the buffer 18, sent out to the moving picture LC driver 14, and transferred to the first RAM via the transfer gate group T11 or T12.
19 or the second RAM 20 is always written, and the written image data is read out and output to the still image LC driver 15 via the transfer gate group T21 or T22.

The stop key 9 is of a binary type in which the output is inverted between "1" and "0" each time the stop key 9 is turned on. The output of the stop key 9 is transferred via the inverter I to the transfer gate group. It is given to T11 as an opening signal and is transferred as it is to the transfer gate group T
21 to the first RAM 19 via the inverter I and the OR gate OR1.
It is given as a write command signal / W (R = 0, W = 1). When the output of the stop key 9 is switched from "0" to "1", the transfer gate group T11 is closed,
New writing of the image data to the first RAM 19 is stopped, the image data in the first RAM 19 is stored and held as it is, the transfer gate group T21 is opened, and the read / write command signal / W to the first RAM 19 is opened. Is switched to the reading (R = 0) side, and the image data of the first RAM 19 is repeatedly read.

The output of the stop key 9 is given as it is to the transfer gate group T12 as an opening signal, and the transfer gate group T12 is fed through the inverter I.
22 is given as an opening signal and further OR gate OR
Read / write command signal / W to the second RAM 20 via
It is given as (R = 0, W = 1). The transfer gate groups T12 and T22 have opening timings completely opposite to the transfer gate groups T11 and T21 of the first RAM 19, and when image data is being written to the first RAM 19, a still image is read from the second RAM 20. When the still image is read from the first RAM 19, the image data is written to the second RAM 20.

The same address data is given to the first RAM 19 and the second RAM 20 from the address counter 21, and the address counter 21 is incremented by the clock signal φs and reset by the vertical synchronizing clock signal φv, so that the address for each screen is obtained. Counting is done. The clock signal φs is a signal having a panel number corresponding to the number of dots in one row in the horizontal direction of the LC panels 3 and 4 during one period of the horizontal synchronizing clock signal.
Is also given as a sampling clock.

Further, the clear key 10 outputs a "1" signal for one vertical period in synchronization with the vertical synchronizing clock φv during the ON operation, and the ON signal of the clear key 10 passes through the OR gates OR1 and OR2. Is given to the first RAM 19 or the second RAM 20 as a write command signal W, the still image is read, and the writing of "00 ... 0" data is performed to the RAM in which the transfer gate group on the input side is closed. It is done and the still image is cleared.

[Operation of Embodiment] When a moving image is displayed on the moving image LC panel 3 and the output of the stop key 9 is "0", the transfer gate group T11 is opened and the moving images are sequentially written in the first RAM 19, and the transfer is performed. The gate group T12 is closed and the second R
Still image is read from AM20 and still image LC panel 4
Will be displayed in. Here, when a moving image displayed on the moving image LC panel 3 is displayed, the stop key 9 is operated. Then, the output of the stop key 9 is inverted to "1" and the transfer gate group T11 is closed.
The moving image written in 9 is read out as a still image and displayed on the still image LC panel 4, the transfer gate group T12 is opened, and the image data is sequentially written in the second RAM 20.

In this way, while watching a moving image on the moving image LC panel 3, it is possible to see a still image of an arbitrary scene on the still image LC panel 4 and simultaneously compare both screens.

In this case, while the still image is being read from one RAM, the moving image is constantly written in the other RAM, so it is not necessary to wait until one moving image is written in the RAM after the stop key 9 is operated. Still images can be displayed quickly.

Of course, with one RAM, the stop key 9 is turned on to open the transfer gate group on the input side of the RAM for the first time, and the image data is written in the RAM.
After the image data for one screen is written in the RAM, the transfer gate group may be closed to repeatedly read the image data from the RAM.

The image display means does not have to be provided in a single main body, but may be provided in each of a plurality of separable main bodies, and the number thereof may be three or more. The moving image information collecting means may be an antenna 7 for receiving television radio waves, a terminal for receiving a signal from an image reproducing device such as a video tape recorder or a television controller of a microcomputer, and the moving image information to be collected. The present invention is not limited to the above-described embodiments, and the same applies to other means and names.

[Effect of the Invention] As described in detail above, the present invention uses a plurality of image display means to display a moving image and a still image in which a specific portion of this moving image is selected. Even if it is displayed, it is possible to display a moving image on other image display means, and it is possible to always contrast a still image with a moving image without losing part or front of the moving image.
This is very convenient when it is necessary to compare a moving image and a still image in an arbitrary scene such as a study of sports form.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an external perspective view of an image display device, FIG. 2 is an overall block circuit diagram of the image display device, and FIG. It is a schematic circuit diagram. 1 ... Main body, 3 ... Movie LC panel, 4 ... Still image LC
Panel, 6 ... Tuning key, 7 ... Antenna, 9
...... Stop key, 12 ... Television circuit, 14 ...
… Movie LC driver, 15 …… Still image LC driver, 1
6 ... Image memory, 17 ... Still image control unit, 19 ... First RAM, 20 ... Second RAM, 21 ... Address counter.

Claims (1)

[Scope of utility model registration request] 1. A plurality of image display means provided in the main body of the apparatus, a moving picture information collecting means for collecting moving picture information in which an image changes, and moving picture information collected by the moving picture information collecting means of the image displaying means. At least one moving image display control means, image information selecting means for selecting specific image information of moving image information displayed by the moving image display control means, and image information selected by this image information selecting means are stored. A plurality of image information storage / holding means for holding, and a still image display control means for reading out image information stored / held in the image information storage / holding means and displaying it on at least one of the image display means, The image information from the moving image information collecting means is repeatedly written in any of the plurality of image information storing and holding means, and the image information from the other image information storing and holding means is repeatedly written. The image information written in the image information is repeatedly read and given to the image display means through the still image display control means, and the image information storing and holding means in which the writing is performed is read out by the selection of the image information selecting means. An image display device, characterized in that the image information storage / holding means, which has been read out, is switched to the written state as well as being switched to the state.