JPS63194289A - Image information display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an apparatus for displaying image data stored on a hard disk or floppy disk on a color TV monitor.

[Prior art and its problems]

Recently, hard disks and floppy disks have come to be used as recording media for document data, etc., and these days the capacities of both have increased, for example, 40MB to 100MB for hard disks and 1.2MB to 1.2MB for floppy disks. It is 3MB and can also be used to record image data, but conventional technology for storing image data was expensive and large, making it impractical. Furthermore, regarding the technology for displaying such images, ordinary color CRT displays for computers cannot display fine color gradations, so they cannot display natural images. If it becomes possible to store image data on a hard disk or a floppy disk and display it on a normal color TV monitor, the scope of use of the hard disk or floppy disk will be greatly expanded.

However, a simple device capable of performing the above-mentioned processing has not yet been developed.

[Means for solving problems and their effects]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention provides an image information display device that can display image data stored on a hard disk or floppy disk on a color TV monitor.

The image information display device of the present invention includes a CPU unit equivalent to a personal computer, and an image output board that captures and outputs image data one screen at a time.

The CPU unit is composed of a CPU, ROM, RAM, input/output board, external storage device interface such as a hard disk or floppy disk, etc., which are interconnected via a system bus.

A hard disk or floppy disk drive is connected to the external storage device interface.

The image output board receives R input from the CPU board.
- an image memory unit storing at least one screen worth of digital image data each having a required gradation level;
DA converts the digital image data read from the image memory section into an analog R-G-B signal
It consists of converters, etc. The analog R-G-B signal that is directly or output from the DA converter is NTSC.
Alternatively, a color TV monitor is connected via a converter that converts it into a PAL color video composite signal.

Further, the image memory section is composed of a multi-board RAM having a parallel input/output board that can input and output signals through parallel access from the CPU, and a serial output port that can output stored contents to the DA converter through serial access. , whose parallel input/output board is connected to the CPU unit via the system bus.

This point is a major feature of the present invention in that it allows image capture from a hard disk or floppy disk and image display on a color TV monitor to be easily performed.

The image data stored in the external storage device is the C
The image data is taken into the image memory unit according to a command from the PU, and the image data is DA-converted and displayed on the color TV monitor.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1, 11 is a CPU unit, 12 is a hard disk or floppy disk drive, and 13 is a CPU unit.
is the operation key, 14 is the image output board, 15 is the color TV
It's a monitor.

The CPU unit 11 includes a 16-bit CPU 21, a ROM 22 storing firmware, a RAM 23, a hard disk and floppy disk interface 24, an input/output board 25, etc., which are interconnected via a system bus 26.

A hard disk or floppy disk drive 12 is connected to the external storage interface 24, and operation keys 13 are connected to the input/output board 25.

The image output board 14 includes an image memory section 31 and DA converters 32a, 32b, and 32c.

Figure 2 shows the details.

The image memory section 31 has three multi-ports corresponding to each color of R-G-B) RAM 33a, 33b, 33c.
It consists of These multi-board RAMs are
It has a capacity to store at least one screen worth of image data read from an external storage device.

The image is stored as digital image data having required levels of RGB gradation. The gradation of each color of R, G, and B is 64 steps if it is 6 bits, and 256 steps if it is 8 bits.

Each multi-board RAM 33a, 33b, 33c is
It has a parallel input/output board 34 that can input and output signals through parallel access from the CPU 21, and a serial output board 35 that can output stored contents to the DA converters 32a, 32b, and 32c through serial access. Since the image memory section 31 has a multi-board access function as described above, it can store image data read from an external storage device under the control of the CPU unit 11, and also output the stored contents serially. can be sent to the DA converters 32a, 32b, and 32c.

The DA converters 32a, 32b, and 32c are connected to the image memory section 3.
The digital image data read from 1 is subjected to DA conversion and converted into analog RGB signals.

In FIG. 2, 41 is a video controller that synchronizes each part, and 42 is a synchronization signal control circuit for the color TV monitor 15.

Now, in the above configuration, when a command to select a desired image from a large number of images stored in the external storage device is input using the operation key 13, the R
The firmware in the OM 22 detects this, and as a result, the image data for one screen of the Wi image is loaded into the image memory section 31 from the external storage device. Immediately thereafter, the stored image data is transferred to the DA converters 32a and 32.
b.32c into an analog R-G-B signal and displayed on the color TV monitor 15.

Note that if the above-mentioned image data is compressed when it is stored in an external storage device, storage capacity can be saved. Of course, in that case, it is necessary to expand the data and restore it to the original image upon reading.

〔Effect of the invention〕

As explained above, according to the present invention, image data stored in an external storage device can be displayed on a color TV monitor as an image having a desired gradation. It is very useful. In particular, the image memory section of the image output board uses a multi-board RAM capable of parallel input/output and serial output, so it is possible to capture images and output the captured images to a color TV monitor extremely quickly. , it has the advantage of being compact as a whole.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an image information display device according to an embodiment of the present invention, and Fig. 2 is a block diagram of an image information display device (output board) in the same device. 11 - CPU unit, 12 - hard disk or floppy disk drive. , 14 ~ image output board, 1
5~Color TV Monitor 9.21-CPU, 22
~ROM, 23~RAM, 24~external storage device interface, 25~input/output board, 31~image memory section,
32a ・32b ・32cmDA converter, 33a・3
3b/33C~Multi-Bot RAM, 34~Parallel input/output port, 35~Serial output board. Application agent Patent attorney Hiroshi Wakabayashi Figure 1

Claims (1)

[Claims] CPU and ROM interconnected via a system bus
, RAM), a CPU unit consisting of an input/output board and an external storage interface, etc., a hard disk or floppy disk drive connected to the external storage interface, and R, G, and B input from the CPU unit at the required stages. from an image memory section that stores at least one screen worth of digital image data having a different color tone, and a DA converter that converts the digital image data read from the image memory section into an analog R/G/B signal by DA converting the digital image data read from the image memory section; The image memory section includes a parallel input/output board that can input and output signals through parallel access from the CPU;
Multi-port R with a serial output board that can output the stored contents to the above DA converter through serial access.
AM, its parallel input/output port is connected to the CPU unit via the system bus, and the image data stored in the external storage device is loaded into the image memory unit according to the instructions of the CPU, and the image data is stored in the image memory. An image information display device configured to display image data captured in the section on a color TV monitor connected to the image output board.