JPH06315126A - Portable image display device - Google Patents

Abstract

PURPOSE:To transmit image data away from home to a facsimile equipment by providing a FAX transmitting block for performing a prescribed image processing, and transmitting the image data by a facsimile through a communication line. CONSTITUTION:In the portable image display device 1 for displaying an image received by a television tuner 9 contained in a housing, on a display part 5 formed integrally with the housing, a camera part 4 for fetching an image of an object to the photographed as image data into the housing is provided integrally, and FAX transmitting blocks 7, 8 for performing a prescribed image processing to the image data fetched by the camera part 4, and transmitting the image data by a FAX through a communication line are provided. In this case, the FAX transmitting blocks 7, 8 are set to the housing so as to be freely attachable and detachable, and the FAX transmission of the image data can be executed by utilizing an analog telephone general subscriber line, etc., as the communication line. Also, by executing a binarization processing as the prescribed image processing, a binary image at the time of FAX transmission can be obtained easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable image display device, and more particularly to a small and lightweight portable image display device for transmitting image data by facsimile.

[0002]

2. Description of the Related Art In recent years, liquid crystal televisions have become widespread in place of CRTs (Cathode Ray Tubes) and are widely used in the fields of vehicle mounting and sports watching.

In particular, recently, a liquid crystal television which has been downsized so as to fit in a chest pocket of a shirt has been developed.
It is becoming possible to watch TV anytime when you carry it with you when you commute to work or on a business trip.

Also, instead of receiving a television broadcast,
Also devised a portable image display device including a camera unit integrally provided with a casing of the device body and a display unit integrally provided with the casing and displaying image data captured by the camera unit. Has been done.

Further, in the past, OA (Office Automat
As a representative of equipment, a relatively expensive facsimile machine has recently been provided with a small and inexpensive one such as a facsimile machine attached to a home telephone. Is expected to spread.

[0006]

However, when using such a portable image display device on the go,
Even if there was image data that I wanted to send to my home or office immediately, I could not send this image.

The present invention has been made in view of such a background, and an object thereof is to provide a portable image display device capable of sending image data from a destination to a facsimile device which has become popular in homes. And

[0008]

The means of the present invention are as follows.

According to a first aspect of the present invention, there is provided a portable image display device 1 for displaying an image received by a television tuner 9 built in a housing on a display unit 5 provided integrally with the housing. Therefore, a camera unit 4 that captures a subject image as image data is integrally provided in the housing, the image data captured by the camera unit 4 is subjected to predetermined image processing, and the image data is transmitted via a communication line. A FAX transmission block 3 for facsimile transmission is provided.

In this case, as in the invention described in claim 2,
It is preferable that the FAX transmission block 3 is detachably provided in the housing.

Further, as in the third aspect of the invention, it is effective that the predetermined image processing includes binarization processing.

According to a fourth aspect of the present invention, television receiving means, binarizing means for binarizing an image received by the television receiving means, and data binarized by the binarizing means are output. And an output unit that operates.

In this case, as in the invention described in claim 5,
In addition to the invention described in claim 4, it is effective that the output means includes a FAX modem.

According to the sixth aspect of the present invention, the camera section 4 provided integrally with the housing of the apparatus main body, and the image data imaged by the camera section 4 provided integrally with the housing are displayed. In the portable image display device 1 including a display unit, a binarizing unit for binarizing the image captured by the camera unit 4 and data binarized by the binarizing unit in the housing. And an output means for outputting.

In this case, as in the invention described in claim 7,
In addition to the invention described in claim 6, it is effective that the output means includes a FAX modem.

[0016]

The operation of the means of the present invention is as follows.

According to the first aspect of the present invention, the display unit and the camera unit are integrally provided in the housing, and the image data captured by the camera unit is subjected to predetermined image processing. Since the FAX transmission block for performing facsimile transmission via the communication line is provided, it is possible to perform FAX transmission of image data via the communication line in the portable image display device.

In this case, as in the invention described in claim 2,
Since the FAX transmission block is detachably provided in the housing, the FAX transmission of the image data can be performed by using, for example, an analog telephone general subscriber line as a communication line.

Further, as in the third aspect of the present invention, by performing the binarization processing as the predetermined image processing, it is possible to easily obtain the binary image at the time of fax transmission.

According to the fourth aspect of the invention, the television received image is binarized and the binarized data is output.

In this case, as in the invention according to claim 5,
By including a FAX modem in the output means, it is possible to perform FAX transmission of image data using, for example, an analog telephone general subscriber line as a communication line.

According to the invention of claim 6, the image data picked up by the camera section is binarized and the binarized data is output.

In this case, as in the invention described in claim 7,
By including a FAX modem in the output means, it is possible to perform FAX transmission of image data using, for example, an analog telephone general subscriber line as a communication line.

[0024]

EXAMPLES Examples will be described below with reference to FIGS.

1 to 4 are views showing an embodiment of a portable image display device according to the present invention.

First, the structure will be described. FIG. 1 is an external view showing a portable image display device of the present invention, and FIG.
It is a figure which shows the state which removed the camera part. In addition, below,
A case where an analog telephone general subscriber line is used as the predetermined communication line will be described.

In FIG. 1, the portable image display device 1 is
It is roughly divided into a device main body 2 and a modem pack 3, and the device main body 2 is composed of a case made of reinforced plastic, and the camera section 4, the liquid crystal display section 5, and the microphone section 6 are integrated in this case. It is provided in.

The modem pack 3 has a power supply section 7 and a modulation / demodulation circuit 8 built-in, and is attached to the lower part of the apparatus body 2 so that the power supply section 7 allows the apparatus body 2 and the modem pack 3 to be installed.
In addition to supplying a predetermined power supply current to each circuit therein, the modulation / demodulation circuit 8 modulates or demodulates predetermined data.

FIG. 3 is a rear view of the portable image display device 1 of this embodiment shown in FIGS.

In FIG. 3, the modem pack 3 of this embodiment is shown.
Is formed with engaging recesses 22a and 22b that engage with engaging claws 21a and 21b provided in the apparatus main body 2, and
An electrode 23 for power supply and a connector 24 for signal supply are formed.

Further, when the lid 3a formed on the back of the modem pack 3 is opened, the modular jack type LINE side input / output terminal 25 for connecting to the analog telephone general subscriber line is connected to the ordinary telephone. Modular jack type TEL side input / output terminal 26, RS-232C terminal 2
7, an indicator 28, and a dip switch 29 are provided.

The power supply unit 7 is built in the modem pack 3 and is attached to the lower portion of the device body 2 to supply a predetermined power supply current to each circuit in the device body 2 and the modem pack 3 via the electrodes 23. Specifically, it has a built-in dedicated Ni-Cd storage battery. In the present embodiment, the power supply unit 7 has been described as an example in which a dedicated NiCd storage battery is incorporated. However, the power supply unit 7 is not limited to this. For example, a unit in which a plurality of AAA alkaline batteries are incorporated, An AC adapter type that converts a commercial AC power source (AC power source) into a DC voltage (DC voltage) of a predetermined voltage value for use, and a D from a cigarette lighter portion of an automobile.
It may be of a car adapter type using a C battery.

The modulation / demodulation circuit 8 is a FAX modem (MODEM, MOdu) built in the modem pack 3 like the power supply section 7.
relation and DEModulation) 46, and this FAX modem 46 uses the LINE side input / output terminal 25 to capture the image data captured by the camera unit 4 and the microphone unit 6.
The modulation for transmitting the audio data taken in by is performed and the demodulation of the received audio data is performed.

The FAX modem 46 is an NCU.
It also has a function of (Network Control Unit) 47, whereby the FAX modem 46 converts a serial digital signal output from a computer or a terminal device into a transmission signal (analog signal) that can be transmitted through a communication line. The function as a "modulator" for transmission and, conversely, a "demodulator (analog signal)" for converting a transmission signal (analog signal) sent via a communication line back into a readable digital signal of a computer or terminal device The NCU 47 enables the use as an analog telephone general subscriber line as a communication line to be used.

Further, the FAX modem 46 is a TEL
By providing the side input / output terminal 26, for example, one line can be used by the modem and the telephone at the time of use at home, and by providing the RS-232C terminal 27, a line such as a personal computer or a word processor can be provided. Fax transmission can be performed by connecting to the RS-232C terminal. By the way, the indicator 28 is for displaying various statuses during FAX transmission, and the DIP switch 29 is for making communication settings for a personal computer, a word processor and the like and its communication software.

As shown in FIG. 2, the camera unit 4 is a small CCD (Charge Coupled Device) camera which is detachably provided in the same plane direction as the display surface of the liquid crystal display unit 5, and is connected via a video cable 4a. It is connected to the device body 2.

The liquid crystal display unit 5 is a TFT type active matrix type liquid crystal display device having a screen size of 1.4 inches, and has three primary colors of R (Red) and G (Green).
n), and a high resolution color liquid crystal display panel of 220 × 279 = 61380 pixels in which pixels corresponding to B (Blue) are arranged in a delta shape.

The microphone section 6 is composed of, for example, an electret condenser type microphone, and as shown in FIG. 1, receives voice data from a microphone hole 6a formed at a lower end position on the front surface of the apparatus main body 2. In this embodiment, an electret condenser type microphone is described as an example of the microphone unit 6, but the microphone unit 6 is not limited to this. For example, a dynamic microphone may be used as the microphone unit 6. It doesn't matter.

The power switch 3 is provided on the main body 2 of the apparatus.
1, power indicator 32, tuning button 3
3, various control switches such as a volume dial 34, an earphone terminal 35, a video on / off switch 36, a video switching switch 37, an image capturing switch 38, etc. are provided.

The power switch 31 is a switch for selecting whether or not to energize the portable image display device 1 with the power supply voltage supplied from the power supply section 7. The power indicator 32 is an LED (Light Emitting Diode). ) And is turned on when the power switch 31 is turned on.

The tuning button 33 is for instructing to increase or decrease the tuning frequency, and the volume dial 34 is for adjusting the earphone volume. The earphone terminal 35 is a terminal for connecting an earphone that also serves as a wire antenna, and also has a function as an antenna terminal.

The image on / off switch 36 is a toggle switch for instructing the liquid crystal display unit 5 whether or not to display the LCD screen, and the image changeover switch 37 is the liquid crystal display unit 5.
The image capture switch 38 is a toggle switch for switching and displaying a transmission screen or a reception screen as a video to be displayed on the display. The image capture switch 38 stores the image displayed on the liquid crystal display unit 5 as image data in a predetermined memory. It is a switch to instruct.

FIG. 4 is a block diagram showing a schematic configuration of the portable image display device 1 shown in FIG. In FIG.
The portable image display device 1 includes a camera unit 4, a liquid crystal display unit 5,
It includes a microphone unit 6, a power supply unit 7, a modulation / demodulation circuit 8, a television tuner 9, an image processing circuit 10, an audio processing circuit 11, a key operation unit 12, and a control circuit 13, and the modulation / demodulation circuit 8 and image processing are performed. The circuit 10, the voice processing circuit 11, the key operation unit 12, and the control circuit 13 are each connected to the bus B.

The camera section 4 is composed of a lens 41 and a CCD 42.

The lens 41 is an optical lens made of glass or plastic provided in the main body 2 of the portable image display device 1. The CCD 42 outputs an electric signal based on the intensity of the light imaged by the lens 41. It is generated and outputs this electric signal (analog signal) to the image processing circuit 10.

The liquid crystal display unit 5 is a DD (Display Driver).
43 and an LCD (Liquid Crystal Display) 44. Note that T1 is a video input terminal and T2 is a video output terminal.

The DD 43 drives the LCD 44 to display an image on the LCD 44 based on the video signal input from the image processing circuit 10 or the video signal input from the video input terminal T1. Is
The input video signal is converted into an analog video signal (analog RGB signal) of a predetermined bit with 220 × 379 pixels,
It is output to the LCD 44.

The LCD 44 is composed of a color liquid crystal display device having a liquid crystal panel 69 described later, and the LCD 44 in the present embodiment has a small flat fluorescent tube 75 described later as its backlight (backside illumination). It is used.

The microphone section 6 outputs the voice data taken in through the microphone hole 6a to the voice processing circuit 11 as voice data to be transmitted.

As described above, the power supply unit 7 is composed of the NiCd storage battery built in the modem pack 3, and when the power switch 31 is turned on, a predetermined power supply voltage is supplied to each of the apparatus main body 2 and the modem pack 3. It supplies the circuit.

The modulation / demodulation circuit 8 has a buffer memory 45.
And a FAX modem 46 and an NCU 47.

The buffer memory 45 is used by the FAX modem 46.
The image data and the audio data demodulated by are temporarily stored and held, and the image data and the audio data to be modulated multiplexed by the CPU 58 are temporarily stored and stored, and are stored in the buffer memory 45. The image data and audio data are sent to the bus B at the time of demodulation and FA at the time of modulation based on the control command from the CPU 58.
It is output to the X modem 46.

As described above, the FAX modem 46 and the NCU 47 receive the image data captured by the camera section 4 and the microphone section 6 via the LINE side input / output terminal 25.
The modulation for transmitting the voice data taken in by is performed, and the demodulation of the received data is performed.

Further, the FAX modem 46 in the present embodiment.
The NCU 47 and the NCU 47 are capable of signal transmission at 14400 bps, which is the maximum data transmission rate that can be used in an analog telephone general subscriber line, and are capable of FAX transmission by G3.

On the other hand, when transmitting voice data, the voice data is treated as digital data sampled at 12 bits / 8 kHz, and this 12 × 8000 = 96000
The bit voice data is compressed to about 50/1000 to form a voice code.

The TV tuner 9 selectively receives a predetermined TV radio wave, converts the received analog video signal into a digital video signal by an ADC incorporated in the TV tuner 9, and this video signal is an image expansion circuit. It is to be output to the buffer memory 48 in 10.

The image processing circuit 10 includes a buffer memory 4
8. Image compression circuit 49, ADC (Analog to Digital Co)
nverter: A / D converter) 50, video memory (V
RAM) 51, 52, DAC (Digital to Analog Conv)
erter: D / A converter) 53.
Incidentally, T3 is an image input terminal.

The buffer memory 48 is an image compression circuit 49.
The compressed image data compressed by is temporarily stored, and the image data stored in the buffer memory 48 in a compressed state is sequentially read out based on a control command from the CPU 58. By the way, by sufficiently securing the storage capacity of the buffer memory 48, a plurality of image data captured from the camera unit 4 can be stored in a compressed state, and by utilizing this, the portable image display device 1 can be used. It can also be used as an electronic still camera.

The image compression circuit 49 performs a binarization process on the image data stored in the video memory 51, and the binarized image data is subjected to a predetermined encoding method, for example,
MH (Modified Huffman), MR (Modufied Relative)
The compression process (encoding) is executed by encoding such as element address designate) or MMR.

The ADC 50 converts an image signal (analog signal) input from the camera section 4 into a signal (digital signal) that can be processed in the image processing circuit 10 and outputs the signal to the video memory 51.

The video memories 51 and 52 are VRAM (Vi
deo RAM), and the video memory 51 is an AD
Image data (digital data) output from C50
The video memory 52 is a semiconductor image memory for storing image data (digital data) compressed and expanded by the image compression circuit 49.

The DAC 53 converts the image signal (digital signal) of the image data stored in the video memory 52 into a signal (analog signal) which can be displayed by the liquid crystal display unit 5 and outputs it. In this embodiment, since the analog data driver is used as the data driver of the LCD 44 described above, a DAC (D / A converter) is required. However, when a digital data driver is used as the data driver. The DAC 53 becomes unnecessary.

The audio processing circuit 11 is composed of an ADC 54, an audio compression / expansion circuit 55, a buffer memory 56, and a DAC 57.

The ADC 54 converts the audio signal (analog signal) input from the microphone unit 6 via the NCU 47 of the modulation / demodulation circuit 8 into a signal (digital signal) that can be processed in the audio processing circuit 11 and compresses the audio. The data is output to the expansion circuit 55.

The audio compression / expansion circuit 55 converts the digital audio data input from the ADC 54 into, for example, CEL.
The P (Code Excited Linear Predivion) algorithm is used to analyze the input data for a fixed time, to synthesize the waveform based on the analyzed parameters, and to calculate the error between the input waveform and the synthesized waveform. The input data from B is compressed (encoded), the compressed audio data is output to the buffer memory 56, and the received compressed audio data demodulated by the modulation / demodulation circuit 8 is expanded (decoded). Processing is performed, and the expanded voice data is output to the DAC 57. The data compression rate in the audio compression process is about 5/100 (about 50/1000) because of the relationship with the audio quality after decompression.

The buffer memory 56 temporarily stores the compressed audio data compressed by the audio compression / expansion circuit 55 and the compressed audio data to be expanded by the audio compression / expansion circuit 55. The voice data stored in the memory 56 in a compressed state is C
It is sequentially read based on a control command from the PU 58.

The key operation unit 12 is composed of various operation switches such as the video on / off switch 36, the video changeover switch 37, and the image capturing switch 38 described above, and corresponds to the key switch when the key switch is pressed. The processing is executed by the CPU 58.

The control circuit 13 is a CPU (Central Process).
sing unit) 58 and RAM (Rand-om Access Memory)
59 and a ROM (Read Only Memory) 60.

The CPU 58 outputs various control signals for controlling each unit in the apparatus main body 2 and the modem pack 3 to each circuit via the bus B and executes a communication control program according to the type of communication line to be connected. Further, when the CPU 58 receives the image data and the audio data multiplexed and transmitted from the image transmission device (videophone device) of the other party, the CPU 58 demodulates them by the modulation / demodulation circuit 8 and inputs them. , The demodulated image data and audio data are separated, the compressed image data is output to the image compression circuit 49 in the image processing circuit 10 via the bus B, and the compressed audio data is output via the bus B. The data is output to the audio compression / expansion circuit 55 in the processing circuit 11.

Further, the CPU 58 has an image compression circuit 49.
Compressed audio data output from the audio compression / expansion circuit 55 to the bus B via the buffer memory 56 is multiplexed and combined to generate image data and The audio data is output to the modulation / demodulation circuit 8 via the bus B.

The RAM 59 is a semiconductor memory that stores program data used in the program processing executed by the CPU 58, compressed image data, audio data, and the like.

The ROM 60 is a semiconductor memory that stores programs and data used in the portable image display device 1.

The bus B is a common signal path for connecting the modulation / demodulation circuit 8, the image processing circuit 10, the audio processing circuit 11, the key operation unit 12, and the control circuit 13, and is an address bus for instructing an address. And a data bus for transferring data.

In the above structure, the liquid crystal display device is generally extremely thin and easy to reduce in size and weight as compared with the image display means such as CRT, and the active matrix type LCD is simple. Matrix type LCD
Compared with, it is possible to control fine halftones, secure a high contrast ratio, and have a high response speed. Therefore, it is an effective device in the field where high-quality and multi-tone color display is required. Yes, especially,
An active matrix type LCD using a TFT which is a three-terminal element can obtain a high image quality comparable to that of a CRT.

In the present embodiment, in order to further utilize the excellent advantage of this liquid crystal display device, as described below,
We are also working to reduce the size of the backlight.

FIG. 5 is an exploded perspective view of the LCD 44.

In FIG. 5, the LCD 44 comprises a front shield case 61, a liquid crystal display unit 62, and a rear shield case 63.

As shown in FIG. 5, the front shield case 61 is provided with a screen display opening 64, and insulating tapes 65 and 66 are adhered to the back surface of the front shield case 61.

The liquid crystal display unit 62 includes a scan driver circuit 67, a data driver circuit 68, a liquid crystal panel 69.
And formed by TAB (Tape Automated Bonding). Reference numeral 70 denotes a flexible substrate on which signal lines for outputting necessary signals to the scan driver circuit 67 and the data driver circuit 68 are wired.

The scan driver circuit 67 drives a scan bus (not shown) in the liquid crystal panel 69, controls on / off of TFTs for one line in the scanning direction, and supplies a voltage of a data bus (not shown). The voltage is applied to the liquid crystal cell for a required period at a predetermined timing.

The data driver circuit 68 drives the data bus of the liquid crystal panel 69 based on the input of image data.

The liquid crystal panel 69 is a TFT type liquid crystal display panel which is one of the active matrix systems, and for example 220 × 2 which is output from the image compression circuit 49 and D / A converted by the DAC 53 via the video memory 52.
An analog video signal of 79 pixels and a predetermined number of bits is DD33.
Is output as an analog RGB signal of 220 × 279 pixels with a predetermined number of bits, and an LC of 220 × 279 pixels is output.
An image is displayed on the display surface of D44.

As shown in FIG. 5, the back shield case 63 has a backlight opening 71 formed therein and is fixed to the liquid crystal display unit 62 by double-sided tapes 72, 73 and 74.

FIG. 6 is an exploded perspective view of the flat fluorescent tube 75.

The flat type fluorescent tube 75 is, as shown in FIG.
A hollow cathode structure in which argon (Ar) gas and mercury (Hg) are enclosed in a container composed of a front glass panel 76, a rear glass panel 77, and a frame glass 78, and which has a U-shaped or V-shaped cross section (not shown). A pair of discharge electrodes on the left and right are arranged opposite to each other, and a phosphor is applied to the inner surfaces of the front glass panel 76 and the rear glass panel 77 by screen printing. Then, lead pieces 79 and 80 extending downward corresponding to the left and right discharge electrodes are provided. In addition, 81 is an exhaust pipe and 82 is a fluorescent screen.

The flat fluorescent tube 75 is the same as the LCD 44.
Is laminated on the back surface of the
Light is evenly applied to the backlight opening 71 from the entire surface of 2.

A transparent thin resin sheet 83 is attached to the front glass panel 76 with double-sided tapes 84 and 85 with a slight gap kept between the transparent resin sheet 83 and the fluorescent screen 82. The resin sheet 83 is formed by blending polyethylene terephthalate (PET) with an ultraviolet blocking agent, and is formed of a material having excellent heat resistance and an ultraviolet blocking function. In this case, the ultraviolet blocking agent may be applied instead of being compounded.

A shield case 86 is provided on the back surface of the flat fluorescent tube 75.
Is to block the electromagnetic waves generated from the flat fluorescent tube 75 and prevent adverse effects on peripheral circuits. 8
7 is a spacer, 88 is a substrate, 89 is a lead wire, and 90 is a connector.

The shield case 86 and the rear glass panel 77 are fixed to each other with double-sided tapes 91 and 92, and as shown in FIG. 6, a flat fluorescent tube 75 to which an insulating tape 93 is attached is attached.

A board 88 is disposed below the shield case 86 via a spacer 87, and lead pieces 79 and 80 and a lead wire 89 are soldered to the board 88 to connect the board 88 and the lead wire 89. And the lead wire 89 is connected to the connector 90.

That is, the spacer 87 is sandwiched between the shield case 86 and the substrate 88 and serves as a receiver when the substrate 88 is adhered and attached by the double-sided tape 94, and when the flat fluorescent tube 75 emits light. Light leakage is prevented, and an absolute distance between the shield case 86 and the substrate 88 with respect to high voltage is secured.

As described above, the liquid crystal display unit 62
Flat fluorescent tube 7 in a state of being extremely close to the back side position of
A configuration in which 5 are arranged is adopted. That is, the shield case 86 of the flat fluorescent tube 75 is closely attached to the rear surface position of the rear shield case 63 of the liquid crystal display unit 62.

Here, since a high voltage is required to cause the flat fluorescent tube 75 to emit light, the flat fluorescent tube 7 is required.
The lead pieces 79 and 80 of No. 5 and the substrate 88 connecting them are in the high voltage region. Then, when the lead pieces 79, 80 and the substrate 88 of the flat fluorescent tube 75 and the rear surface shield case 63 of the liquid crystal display unit 62 come close to each other, a discharge occurs due to a high potential difference, a current flows, and the inside of the liquid crystal display unit 62 is destroyed. there is a possibility.

Therefore, the resin sheet 83 covering the fluorescent surface 82 and the lead pieces 79 and 80 is provided on the front surface of the flat fluorescent tube 75.
Since the lead pieces 79, 80 are touched by the hand, the lead pieces 79, 80 and the substrate 88 and the liquid crystal display unit 62 are provided.
The rear shield case 63 can be insulated so as not to cause air discharge (leakage).

Further, since ultraviolet rays are generated from the flat type fluorescent tube 75, the liquid crystal is deteriorated by the ultraviolet rays when it is used as a back light as it is, but since the resin sheet 83 contains the ultraviolet ray blocking agent, the liquid crystal is protected. can do.

In addition, the flat fluorescent tube 75 uses a resin sheet 83 having excellent heat resistance because the electric characteristics of the flat fluorescent tube 75 increase the stability of light emission as the fluorescent tube surface has a more uniform temperature distribution. By sticking the resin sheet 83 and the fluorescent screen 82 with a slight gap therebetween, a small space is set between the resin sheet 83 and the fluorescent screen 82, and the heat is dissipated from the fluorescent tube to use the air. It has a heat retention function to warm the layers.

Furthermore, when the fluorescent surface 82 of the flat fluorescent tube 75 is scratched at the time of assembly at the factory, diffuse reflection occurs due to the scratch, and the scratch appears as a shadow on the liquid crystal screen. 83 prevents damage in the process.

Next, the operation of this embodiment will be described.

First, the operation of the control circuit 13 shown in FIG. 4 will be described. The CPU 58 in the control circuit 13
The program corresponding to the processing operation of
3 is stored in the ROM 60.

In the following, the case where the telephone line is always connected and used is described. However, in actual use, as in a portable camera, only the main body of the portable image display device 1 is used to create an outside scenery or the like. It is also possible to use the method of capturing an image of, and connecting to a telephone line as necessary to output image data.

Portable image display device 1 in this embodiment
When the portable image display device 1 is in the power-off state, the LINE side input / output terminal 25 and the TE in the modem pack 3 are connected.
It is connected to the L-side input / output terminal 26 in a through state, and the voice signal of the telephone is directly output from the TEL-side input / output terminal 26 to the analog telephone general subscriber line via the LINE-side input / output terminal 25. The voice signal input from the telephone general subscriber line is input / output terminal 25 on the LINE side.
Is input to the telephone as it is from the TEL side input / output terminal 26.

When the portable image display device 1 is in the power-on state, the LINE side input / output terminal 25 and the TEL side input / output terminal 26 in the modem pack 3 are not connected.

Then, the portable image display device 1 according to the present embodiment.
Has a first operation mode used as a normal telephone and a second operation mode used as a facsimile machine.

Hereinafter, an operation example of the first operation mode (ie, voice data transmission / reception mode) and an operation example of the second operation mode (ie, image data transmission mode) will be described.

(First Operation Mode) First, the voice data input from the microphone unit 6 is sent to the ADC 5 via the NCU 47.
After A / D conversion by 4, the audio compression / expansion circuit 55
It is compressed by and is temporarily stored in the buffer memory 56. Then, the audio data stored in the buffer memory 56 in a compressed state is sequentially read based on a control signal from the CPU 58.

The CPU 58 sequentially reads the compressed audio data from the buffer memory 56 and outputs the audio data as FA data.
Output to the X modem 46. Then, the input compressed data is modulated by the FAX modem 46, and
DSP (D-igital Signal Proceser) in the X-modem 46
After D / A conversion by NCU47, LIN
It is output to the analog telephone general subscriber line through the E side input / output terminal 25.

On the other hand, the voice data input to the NCU 47 via the analog telephone general subscriber line is demodulated in the FAX modem 46, A / D converted, output to the bus B, and compressed by the CPU 58. The data is temporarily stored in the buffer memory 56.

Then, the voice compression / decompression circuit 55 sequentially reads the written voice compression data from the buffer memory 56, decompresses it, and outputs it to the DAC 57 at a constant rate. The expanded analog audio data can be heard from an earphone (not shown) connected to the in-phone terminal 35.

The above transmission / reception processing is repeatedly executed until the call (voice data communication) is completed.

(Second Operation Mode) The image data picked up by the camera section 4 is A / D converted by the ADC 50, and the image data corresponding to one screen output from the ADC 50 by the trigger signal from the CPU 58 is converted into the video memory. It is taken in by 51. The image data captured in the video memory 51 is subjected to a binarization process described later, is compressed by the image compression circuit 49, and is temporarily stored in the buffer memory 48. Then, the image data stored in the buffer memory 48 in a compressed state is sequentially read based on a control signal from the CPU 58.

Here, the image data captured by the camera unit 4 during the communication via the telephone line or by capturing the outside scenery or the like using only the main body of the portable image display apparatus 1 is displayed on the LCD 44. When the operator wants to record the displayed self-portrait (transmission image), the operator depresses the image capture switch 38 to store the image data stored in the buffer memory 48 in the RAM 59.

The compressed image data read by the CPU 58 is modulated by the FAX modem 46, and the NCU 47
The data is output from the LINE side input / output terminal 25 via the, and is transmitted by fax.

The binarization process will be described in detail below with reference to FIGS. 7 and 8.

FIG. 7 is a flowchart showing the binarization process, and FIG. 8 is an explanatory diagram of the error diffusion process by the filter in the binarization process of FIG.

First, the image compression / expansion circuit 49 shown in FIG.
Thus, the maximum value and the minimum value of the image data in the video memory 51 are detected (step P1), the automatic gain control value (AGC value) is determined (step P2), and
Image data (pixel data) is read (step P3).

Then, the value of the read image data is compared with the threshold value to perform the binarization process (step P4), and the binary image data (original value) is converted into binary value × a.
By subtracting (output value), an error (error = multi-value−two values × a) is obtained (step P5). Here, a is the maximum value that the multi-valued image data can take. For example, in the case of 4 bits, "7" of "0" to "7" is the maximum value.

Next, error diffusion is performed by the error diffusion filter (step P6). This error diffusion filter is shown in FIG.
As an example of this, the error in the "●" part is diffused to adjacent places at a rate indicated by numerical values (to be exact, 1/16 of these numerical values), in other words, "●" The error of the division is distributed to the surroundings.

When this error diffusion processing is performed, the next image data (pixel data) is read (step P7),
After the error is collected, the process returns to step P4, and the processes of steps P4 to P8 are performed in the same manner as above.

The image compression / expansion circuit 49 passes the image data subjected to the binarization processing through the buffer memory 48.
Output to bus B.

The image data input to the image compression / expansion circuit 49 is not limited to binarized image data, but may be multi-valued image data taken by the camera unit 4.

As described above, in this embodiment, it is possible to make a telephone call and realize facsimile transmission while using the portable image display device 1.

Further, in the conventional apparatus, in order to record the image to be transmitted, another recording apparatus (for example, an audio cassette tape recorder) was necessary for recording, but in the present embodiment, When a large-capacity RAM 59 is mounted and an image taken by the camera unit 4 is desired to be recorded, a desired image can be easily saved by pressing the image capture switch 38. In this case, instead of the RAM 59, a memory card 94 composed of a non-volatile flash memory or the like may be used as shown in FIG.
By storing the image to be transmitted in the memory card 94, a plurality of images can be stored by exchanging the memory card 94. In FIG. 9, 95 is a memory slot in which the memory card 94 is mounted.

Further, since the conventional videophone device is generally made on the assumption that it is of a stationary type and once installed, it cannot be moved to another place for use, so that compressed data is transmitted. In addition, the camera unit which is an image input unit, the CRT which is an image display unit, and the telephone which is an audio input / output unit are integrally configured.
Although it was difficult to reduce the weight, it was difficult to obtain a portable device, and the existing telephone could not be used, but in the present embodiment,
Due to the high image quality of liquid crystal display devices in recent years, by adopting a color TFT type liquid crystal display device instead of a conventional CRT as a display device, it is possible to reduce power consumption and to reduce the size and weight of the device. It is possible. In this case, since the small flat fluorescent tube 75 is used for the backlight used in the liquid crystal display device,
The LCD 44 portion can be made thinner, and the size and weight can be greatly reduced.

Further, in the conventional videophone apparatus, the camera section is fixed to the apparatus main body, so that the image capturing range is limited. However, the portable image display apparatus 1 according to the present embodiment.
As shown in FIG. 2, since the camera unit 4 is detachably provided from the apparatus main body 2 and the apparatus main body 2 and the camera unit 4 are connected by the video cable 4a, the camera unit 4 is connected during the image transmission process. 4 can be separated from the apparatus main body 2, and regardless of the arrangement position of the apparatus main body 2, the operator can freely photograph (capture an image) according to his or her preference.

Furthermore, by providing a composite video input / output terminal, an analog / digital RGB input / output terminal, etc. as the video input terminal T1 and the video output terminal T2 provided in the liquid crystal display section 5, the video cassette recorder (V
It is also possible to connect to a video device including a CR) or a laser disc player (LDP), a computer, or the like. For example, by connecting a video cassette recorder or the like having a video output terminal, a video image is displayed on the liquid crystal display unit 5. It is also possible to display.

The image data compression method is not limited to the JPEG algorithm in this embodiment, but may be, for example, a block coding method, a predictive coding method, an orthogonal transform coding method, or the like. The data compression method is not limited to the CELP algorithm in this embodiment, but may be, for example, AD-PCM (Adaptive Differenti-
al Palse Code Modulation) method, VSELP (Vector
A Sum Excited Linear P-rediction) method or the like may be used.

[0127]

According to the present invention, in the invention described in claim 1, the display section and the camera section are integrally provided in the housing, and
By performing a predetermined image processing on the image data captured by the camera unit and providing a FAX transmission block for transmitting this image data by facsimile via the communication line, the image is transmitted via the communication line in the portable image display device. FAX transmission of data can be performed.

In this case, as in the invention described in claim 2,
Since the FAX transmission block is detachably provided in the housing, the FAX transmission of image data can be performed by using, for example, an analog telephone general subscriber line as a communication line.

Further, as in the third aspect of the invention, by performing the binarization process as the predetermined image process, the binary image at the time of fax transmission can be easily obtained.

According to the fourth aspect of the invention, the television received image can be binarized and the binarized data can be output. In this case, by including a FAX modem in the output means as in the invention described in claim 5, it is possible to perform FAX transmission of image data by using, for example, an analog telephone general subscriber line as a communication line. .

According to the sixth aspect of the invention, the image data picked up by the camera section can be binarized and the binarized data can be output. In this case, by including a FAX modem in the output means as in the invention described in claim 7, it is possible to perform FAX transmission of image data by using, for example, an analog telephone general subscriber line as a communication line. .

[Brief description of drawings]

FIG. 1 is an external view showing a portable image display device of the present invention.

FIG. 2 is a diagram showing a state in which a camera unit of FIG. 1 is removed.

FIG. 3 is a perspective view of the portable image display device of the present invention seen from the back side.

FIG. 4 is a block diagram showing a schematic configuration of the portable image display device of FIG.

FIG. 5 is an exploded perspective view of an LCD.

FIG. 6 is an exploded perspective view of a flat fluorescent tube.

FIG. 7 is a flowchart showing a binarization process.

8 is an explanatory diagram of error diffusion processing by a filter in the binarization processing of FIG. 7.

FIG. 9 is a perspective view of a portable image display device according to another embodiment.

[Explanation of symbols]

 1 Portable image display device 2 Device body 3 Modem pack 4 Camera part 4a Video cable 5 Liquid crystal display part 6 Microphone part 6a Microphone hole 7 Power supply part 8 Modulation / demodulation circuit 9 TV tuner 10 Image processing circuit 11 Audio processing circuit 12 Key operation Part 13 Control circuit 21a, 21b Engaging claw 22a, 22b Engaging recess 23 Electrode 24 Connector 25 LINE side input / output terminal 26 TEL side input / output terminal 27 RS-232C terminal 28 Indicator 29 Dip switch 31 Power switch 32 Power indicator 33 Tuning Button 34 Volume dial 35 Earphone terminal 36 Video on / off switch 37 Video switching switch 38 Image capture switch 41 Lens 42 CCD 43 DD 44 LCD 45 Buffer memory 46 FAX modem 47 NC 48 buffer memory 49 image compression circuit 50 ADC 51 video memory 52 video memory 53 DAC 54 ADC 55 audio compression / expansion circuit 56 buffer memory 57 DAC 58 CPU 59 RAM 60 ROM 61 front shield case 62 liquid crystal display unit 63 rear shield case 64 screen Display opening 65 Insulating tape 66 Insulating tape 67 Scan driver circuit 68 Data driver circuit 69 Liquid crystal panel 70 Flexible substrate 71 Backlight opening 72 Double-sided tape 73 Double-sided tape 74 Double-sided tape 75 Flat fluorescent tube 76 Front glass panel 77 Rear Glass panel 78 Frame glass 79,80 Lead piece 81 Exhaust pipe 82 Fluorescent surface 83 Resin sheet 84,85 Double-sided tape 86 Shield case 87 Spacer 88 Substrate 9 lead 90 connector 91, 92 double-sided tape 93 insulating tapes 94 memory card 95 memory slots 96 video printer 97 Slot 98 power switch 99 various operation switches T1 video input terminal T2 video output terminal T3 image input terminal B bus

Claims (7)

[Claims] 1. A portable image display device for displaying an image received by a television tuner built in a casing on a display unit provided integrally with the casing, wherein the casing is provided with a subject. A camera unit that captures an image as image data is integrally provided, and a FAX transmission block that performs predetermined image processing on the image data captured by the camera unit and that transmits the image data by facsimile via a communication line is provided. Characteristic portable image display device. 2. The portable image display device according to claim 1, wherein the FAX transmission block is detachably provided in the housing. 3. The portable image display device according to claim 1, wherein the predetermined image processing includes binarization processing. 4. A television receiving means, a binarizing means for binarizing an image received by the television receiving means, and an output means for outputting data binarized by the binarizing means. A portable image display device characterized by being provided. 5. The portable image display means according to claim 4, wherein the output means includes a FAX modem. 6. A portable device comprising a camera unit integrally provided with a casing of an apparatus main body, and a display unit integrally provided with the casing and displaying image data captured by the camera unit. In the image display device for use, a binarizing unit for binarizing the image picked up by the camera unit and an output unit for outputting the data binarized by the binarizing unit are provided in the housing. A portable image display device characterized by the above. 7. The portable image display means according to claim 6, wherein said output means includes a FAX modem.