JPH11231979A - Information processor and image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate an A/D converter and a power circuit and to simplify a circuit configuration by displaying image data on an image display device by a digital image signal and a power signal which are transmitted from a computer body. SOLUTION: When a liquid crystal display device 110 is connected to a personal computer body 100, a digital image signal outputted from a video controller 103 is transmitted to the device 110 through a connector 107 for a digital image signal, a cable 115 and a connector 111 for a digital image signal by a transmitting circuit 105. After a receiving circuit 112 of the device 110 receives the transmitted digital image signal, a liquid crystal panel driving circuit 113 shows it on a liquid crystal panel 114. Thus, it is possible to eliminate an A/D converter and a power circuit and to simplify a circuit configuration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus having an image display device, and more particularly to a technology effective when applied to an information processing device in which an external liquid crystal display device is connected by a cable.

[0002]

2. Description of the Related Art In a conventional information processing device, a CRT (CRT) is used as an image display device for displaying a result of performing a specific process.
Those using an (Anode Ray Tube) are widely used. When a liquid crystal display device driven by a digital image signal is connected to such an information processing device, the information processing device and the liquid crystal display device are connected via an analog interface.

FIG. 3 is a diagram showing a schematic configuration of an information processing apparatus to which a conventional liquid crystal display device is connected. As shown in FIG. 3, a conventional personal computer 300 has a C
PU 301, main memory 302, video controller 303, video memory 304, D / A converter 3
05, a power supply circuit 306, and an analog image signal connector 307.

[0004] The CPU 301 is a control device for controlling the operation of the personal computer main body 300. The main memory 302 is a storage device for storing various programs and data for controlling the operation of the personal computer main body 300.

[0005] The video controller 303 is a control device for controlling transmission of image signals to the liquid crystal display device 310. The video memory 304 is a liquid crystal display device 3
10 is a storage device for storing image data to be transmitted to 10.

The D / A converter 305 is a circuit for converting a digital image signal output from the video controller 303 into an analog image signal. The power supply circuit 306 is a circuit for supplying power to each unit of the personal computer main body 300. The analog image signal connector 307 is a connector for transmitting an analog image signal to the liquid crystal display device 310, which is an image display device connected to the outside.

The liquid crystal display device 310 includes an analog image signal connector 311, an A / D converter 312,
A liquid crystal panel drive circuit 313, a liquid crystal panel 314, a cable 315, and a power supply circuit 316 are provided.

The analog image signal connector 311 is a connector for receiving the analog image signal from the personal computer main body 300 by the liquid crystal display device 310. The A / D converter 312 is a circuit that converts an analog image signal transmitted from the personal computer main body 300 into a digital image signal.

A liquid crystal panel driving circuit 313 is a circuit for driving a liquid crystal panel 314 based on an image signal digitally converted by the A / D converter 312 to display an image. The liquid crystal panel 314 is the personal computer body 3
The image data transmitted from 00 is transmitted to the liquid crystal panel driving circuit 3
13 is an image display panel displayed by the operation of FIG.

[0010] The cable 315 is a transmission line for transmitting an analog image signal from the personal computer main body 300 to the liquid crystal display device 310. Power supply circuit 316
Is a circuit for supplying power to each part of the liquid crystal display device 310.

When a liquid crystal display device 310 is connected to a conventional personal computer main body 300 as shown in FIG. 3, an image signal converted into analog by the personal computer main body 300 is converted into a liquid crystal display device 31.
A value of 0 returns to a digital image signal for display.

That is, the digital image signal output from the video controller 303 is converted into a D / A converter 305.
To convert the analog image signal to the liquid crystal display device 310 via the analog image signal connector 307, the cable 315, and the analog image signal connector 311. A / D converter 3 of display device 310
After the digital image signal is converted into a digital image signal at 12, the display on the liquid crystal panel 314 is performed by the liquid crystal panel drive circuit 313.

In the conventional liquid crystal display device 310, a power supply circuit 316 for operating the device is built in, and each part of the liquid crystal display device 310 is operated by receiving power from the outside.

On the other hand, in the conventional information processing apparatus, the personal computer main body 300 and the liquid crystal display device 310 are connected via a digital interface using a dedicated video interface board, and digital image signals are transmitted from the personal computer main body 300 to the liquid crystal display. Some of them are transmitted to the device 310 to display images.

As described above, when an image is displayed by transmitting a digital image signal from the personal computer main body 300 to the liquid crystal display device 310 using the dedicated video interface board, the dedicated video interface board is used. The digital image signal output from the controller is transmitted to the liquid crystal display device 310, and the liquid crystal panel driving circuit 313 transmits the digital image signal to the liquid crystal panel 31.
4 is displayed.

[0016]

In a conventional information processing apparatus, an image signal is transmitted to a liquid crystal display device via an analog interface. Therefore, a D / A converter for converting an image signal to be transmitted into an analog signal and a receiving apparatus are provided. There is a problem that an A / D converter for converting the converted image signal into a digital signal is required.

The analog interface used in the conventional information processing apparatus does not include a signal line for supplying power from the information processing apparatus main body to the image display apparatus.
The liquid crystal display device connected via the analog interface has a problem that a power supply circuit for operating the device is required.

Further, in the conventional information processing apparatus, when a digital image signal is transmitted from the information processing apparatus to the liquid crystal display device by using a dedicated video interface board to display an image, the image is displayed on the dedicated video interface board. Since the video controller and the video memory are used, there is a problem that the video controller and the video memory provided in advance in the information processing apparatus body are wasted.

An object of the present invention is to solve the above-mentioned problem and to provide an A / D
It is an object of the present invention to provide a technique capable of connecting an image display device having a simplified circuit configuration by omitting a converter and a power supply circuit.

Another object of the present invention is to provide a technology capable of omitting an A / D converter and a power supply circuit and connecting a digital image display device or an analog image display device having a simplified circuit configuration. .

Another object of the present invention is to provide a technology capable of omitting an A / D converter and a power supply circuit in an image display device, making the image display device thinner, and improving space saving.

[0022]

According to the present invention, there is provided an information processing apparatus for transmitting image data to an image display device connected to a computer main body and displaying the image data by using a digital image signal and a power supply signal transmitted from the computer main body. The image is displayed on the image display device.

In the information processing apparatus of the present invention, the computer includes a video controller for outputting a digital image signal, a transmission circuit for transmitting the digital image signal to the image display device, and a power supply circuit for supplying power to the image display device. And a digital image signal connector for transmitting a digital image signal and a power supply signal to the image display device.

The image display apparatus of the present invention has a digital image signal connector for receiving a digital image signal and a power supply signal from a computer main body, and a receiving circuit for receiving a digital image signal transmitted from the computer main body. An image display panel driving circuit for driving an image display panel with a digital image signal and a power supply signal transmitted from the computer main body to display an image, and transmitting the image data transmitted from the computer main body to the liquid crystal panel driving circuit. And an image display panel for displaying by operation.

In the information processing apparatus according to the present invention, the computer main body transmits the digital image signal output from the video controller to the liquid crystal display device via the digital image signal connector and the cable by the transmission circuit, and transmits the transmitted digital signal. After the image signal is received by the receiving circuit of the image display device, display on the image display panel is performed by the image display panel driving circuit.

Further, the image display device does not include a power supply circuit for operating the device, and operates each part of the image display device by receiving supply of power from a power supply circuit of the computer main body.

As described above, according to the information processing apparatus of the present invention, since a digital image signal and a power supply signal are supplied from the computer main body, an A / D converter and a power supply circuit are omitted to simplify the circuit configuration. It is possible to connect a display device.

[0028]

(Embodiment 1) An information processing apparatus according to Embodiment 1 having a digital interface for transmitting and receiving digital image signals and power supply signals will be described below.

FIG. 1 is a diagram showing a schematic configuration of an information processing apparatus according to the present embodiment. As shown in FIG. 1, the personal computer main body 100 of the present embodiment includes a CPU 101, a main memory 102, a video controller 103, a video memory 104, a transmission circuit 105, and a power supply circuit 106.
And a digital image signal connector 107.

The CPU 101 is a control device for controlling the operation of the personal computer 100. The main memory 102 is a storage device for storing various programs and data for controlling the operation of the personal computer main body 100.

The video controller 103 is a control device for controlling transmission of image signals to the liquid crystal display device 110. The video memory 104 is the liquid crystal display device 1
10 is a storage device for storing image data to be transmitted to 10.

The transmission circuit 105 is connected to the video controller 10
3 is a circuit for transmitting a digital image signal output from the liquid crystal display device 3 to the liquid crystal display device 110. Power supply circuit 106
Is a circuit for supplying power to each part of the personal computer main body 100 and the liquid crystal display device 110. The digital image signal connector 107 is a connector for transmitting a digital image signal and a power signal to a liquid crystal display device 110 which is an image display device connected to the outside.

The liquid crystal display device 110 has a digital image signal connector 111, a receiving circuit 112, a liquid crystal panel driving circuit 113, a liquid crystal panel 114, and a cable 115.

The digital image signal connector 111 is a connector for receiving the digital image signal and the power signal from the personal computer main body 300 by the liquid crystal display device 110. The receiving circuit 112 is a circuit for receiving a digital image signal transmitted from the personal computer main body 100.

The liquid crystal panel driving circuit 113 is a circuit for driving the liquid crystal panel 114 based on a digital image signal transmitted from the personal computer main body 100 to display an image. The liquid crystal panel 114 is an image display panel that displays image data transmitted from the personal computer main body 100 by the operation of the liquid crystal panel drive circuit 113. The cable 115 is the personal computer body 1
A transmission line for transmitting a digital image signal and a power supply signal from 00 to the liquid crystal display device 110.

When the liquid crystal display device 110 is connected to the personal computer main body 100 as shown in FIG. 1, the digital image signal and the power supply signal are transmitted from the personal computer main body 100 to the liquid crystal display device 11.
0 to display an image.

That is, the digital image signal output from the video controller 103 is transmitted by the transmission circuit 105 to the digital image signal connector 107 and the cable 11.
5 and to the liquid crystal display device 110 via the digital image signal connector 111, and the transmitted digital image signal is received by the receiving circuit 112 of the liquid crystal display device 110, and then transmitted to the liquid crystal panel 114 by the liquid crystal panel driving circuit 113. Is displayed.

The liquid crystal display device 110 does not include a power supply circuit for operating the device,
Each part of the liquid crystal display device 110 is operated by receiving power supply from the power supply circuit 106 of the personal computer main body 100.

As described above, in the information processing apparatus of the present embodiment, the digital image signal is transmitted to the external liquid crystal display device 110 using the video controller 103 and the video memory 104 provided in the personal computer main body 100. Unlike a conventional information processing apparatus, which uses a dedicated video interface board to transmit a digital image signal from a computer main body to an image display device to display an image, a video controller provided in the personal computer main body 100 in advance. Without wasting 103 and video memory 104,
It is possible to display an image.

As described above, according to the information processing apparatus of the present embodiment, since the digital image signal and the power supply signal are supplied from the computer main body, the A / D converter and the power supply circuit are omitted and the circuit configuration is simplified. It is possible to connect the image display device.

According to the information processing apparatus of this embodiment,
Since the image display panel is driven by the digital image signal and the power signal transmitted from the computer main body to display an image, the A / D converter and the power circuit in the image display device are omitted to reduce the thickness of the image display device. Space saving can be improved.

(Embodiment 2) An information processing apparatus according to Embodiment 2 having a digital interface for transmitting and receiving digital image signals and power supply signals and an analog interface for transmitting and receiving analog image signals will be described below.

FIG. 2 is a diagram showing a schematic configuration of the information processing apparatus of the present embodiment. As shown in FIG. 2, the personal computer main body 100 of the present embodiment includes a D / A converter 201.
And an analog image signal connector 202.

The D / A converter 201 is a circuit for converting a digital image signal output from the video controller 103 into an analog image signal. The analog image signal connector 202 is a connector for transmitting an analog image signal to a CRT display device 203 which is an image display device connected to the outside.

The CRT display device 203 is an image display device for displaying analog image data transmitted from the personal computer main body 100. The other configuration of the information processing apparatus according to the present embodiment illustrated in FIG. 2 is the same as that illustrated in FIG.

As shown in FIG. 2, in the information processing apparatus of this embodiment, the personal computer main body 100 has an interface for digital image signals and an interface for analog image signals, and the personal computer main body 100 has a liquid crystal display. When the device 110 is connected, a digital image signal and a power signal are transmitted from the personal computer body 100 to the liquid crystal display device 110 to display an image, and when the CRT display device 203 is connected to the personal computer body 100. Transmits an analog image signal from the personal computer main body 100 to the CRT display device 203.
To display the image.

That is, the personal computer body 1
When the liquid crystal display device 110 is connected to the liquid crystal display device 110, the digital image signal output from the video controller 103 is transmitted by the transmission circuit 105 through the digital image signal connector 107, the cable 115, and the digital image signal connector 111. After transmitting the digital image signal to the receiving circuit 112 of the liquid crystal display device 110, the liquid crystal panel driving circuit 113 transmits the digital image signal to the liquid crystal panel 114.
Display to.

The liquid crystal display device 110 does not include a power supply circuit for operating the device,
Each part of the liquid crystal display device 110 is operated by receiving power supply from the power supply circuit 106 of the personal computer main body 100.

On the other hand, the personal computer body 100
When the CRT display device 203 is connected to
The digital image signal output from the video controller 103 is converted into an analog image signal by the D / A converter 201, and the analog image signal is transmitted to the CRT display device 203 via the analog image signal connector 202 and transmitted. The analog image signal thus displayed is displayed on the CRT display device 203.

As described above, in the information processing apparatus of this embodiment, a digital image signal is transmitted to the external liquid crystal display device 110 using the video controller 103 and the video memory 104 provided in the personal computer main body 100. Unlike a conventional information processing apparatus, which uses a dedicated video interface board to transmit a digital image signal from a computer main body to an image display device to display an image, a video controller provided in the personal computer main body 100 in advance. Without wasting 103 and video memory 104,
It is possible to display an image.

When an image display device such as a CRT display device 203 having only an analog interface is connected, the video controller 103 and the video memory 1 provided in the personal computer main body 100 are connected.
Since an analog image signal is transmitted to an external image display device using
The video controller 103 and the video memory 104 provided in advance can be effectively used.

As described above, according to the information processing apparatus of the present embodiment, a digital interface for supplying a digital image signal and a power supply signal from a computer main body and an analog interface for transmitting an analog image signal are provided. Therefore, it is possible to connect a digital image display device or an analog image display device in which the A / D converter and the power supply circuit are omitted and the circuit configuration is simplified.

According to the information processing apparatus of this embodiment,
Since the image display panel is driven by the digital image signal and the power signal transmitted from the computer main body to display an image, the A / D converter and the power circuit in the image display device are omitted to reduce the thickness of the image display device. Space saving can be improved.

[0054]

According to the present invention, a digital image signal and a power supply signal are supplied from the computer main body.
It is possible to connect an image display device whose circuit configuration is simplified by omitting the D converter and the power supply circuit.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a schematic configuration of an information processing apparatus according to a first embodiment.

FIG. 2 is a diagram illustrating a schematic configuration of an information processing apparatus according to a second embodiment.

FIG. 3 is a diagram showing a schematic configuration of an information processing device to which a conventional liquid crystal display device is connected.

[Explanation of symbols]

Reference Signs List 100 personal computer body, 110 liquid crystal display device, 101 CPU, 102 main memory, 103 video controller, 104 video memory, 105 transmission circuit, 106 power circuit, 107 connector for digital image signal, 111 ... Digital image signal connector, 112 ... Receiving circuit, 113 ... Liquid crystal panel driving circuit, 114 ... Liquid crystal panel, 115 ... Cable,
201: D / A converter, 202: Connector for analog image signal, 203: CRT display device, 300: Personal computer main body, 310: Liquid crystal display device, 301: CPU, 302: Main memory, 303
... video controller, 304 ... video memory, 305
... D / A converter, 306 ... power circuit, 307 ... analog image signal connector, 311 ... analog image signal connector, 312 ... A / D converter, 313 ... liquid crystal panel drive circuit, 314 ... liquid crystal panel, 315 ... Cable, 316
... power supply circuit.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Takuya Morimoto 810 Shimoimaizumi, Ebina-shi, Kanagawa In the Office Systems Division, Hitachi, Ltd.

Claims (3)

[Claims] An information processing apparatus for transmitting image data to an image display device connected to a computer main body and displaying the image data. A video controller for outputting a digital image signal, and transmitting the digital image signal to the image display device. A transmission circuit that performs power, a power supply circuit that supplies power to the image display device,
An information processing apparatus, comprising: a digital image signal connector for transmitting a digital image signal and a power signal to an image display device. 2. An information processing apparatus for transmitting image data to an image display device connected to a computer main body and displaying the image data, comprising: a video controller for outputting a digital image signal; and transmitting the digital image signal to the image display device. A transmission circuit that performs power, a power supply circuit that supplies power to the image display device,
A digital image signal connector for transmitting a digital image signal and a power signal to an image display device, a D / A converter for converting a digital image signal into an analog image signal, and an analog image signal for an image display device An information processing apparatus comprising: an analog image signal connector for transmitting an analog image signal. 3. An image display apparatus for receiving and displaying image data transmitted from a computer main body, comprising: a digital image signal connector for receiving a digital image signal and a power supply signal from the computer main body;
A receiving circuit for receiving a digital image signal transmitted from the computer main body, an image display panel driving circuit for driving the image display panel with the digital image signal and the power signal transmitted from the computer main body to display an image, An image display panel for displaying image data transmitted from a computer main body by operation of the liquid crystal panel drive circuit.