JPH096250A - Display device - Google Patents

Abstract

PURPOSE: To downsize and lighten the device construction, and facilitate selection of installation place and movement of the installation place by providing a flat display part and a signal supply part which can be fitted to the back face part thereof so as to be attachable and detachable. CONSTITUTION: A flat display part 60 is composed of a liquid crystal display panel 14 and a frame member 50 supporting the panel 14. Speakers 44, 45 are incorporated in the frame member 50 positioning on both sides of the panel 14. A tuner box 52 which is a signal supply part and is fitted to the back face part of the flat display part 60 so as to be attachable and detachable is provided. The tuner box 52 has a support leg part 56. When the tuner box 52 is fitted to the flat display part 60, the same supports the flat display part 60 as keeping the attitude thereof by the support leg part 56. The flat display part 60 can be fitted onto a wall face and the like via metal fittings in a state that the tuner box 52 is detached therefrom.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device having a flat display section.

[0002]

2. Description of the Related Art Conventionally, a CRT (cathode ray tube) is used as a display unit.
And a display device configured to display an image based on an information signal.

Some of such display devices are installed in a house or a room of a vehicle and are used as a television device or an information terminal device for displaying various information signals. Such a display device is installed and used on a desk or floor in the room.

[0004]

By the way, in the display device as described above, the CRT has a depth length of about 50% to 100% with respect to the size of the image display surface. Is becoming larger.

In the above display device,
Since the weight of the CRT is considerably large, the CRT has a considerable weight as a whole, and it is difficult to select an installation site, move the installation site, store and transport it.

Further, in the above display device, it is difficult to change the direction of the display portion according to the usage state because the CRT has a large depth and a large weight.

Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and the device configuration is reduced in size and weight, and installation site selection, installation site movement, storage, and transportation are easy. It is also an object of the present invention to provide a display device that can be easily changed and the direction of each display unit can be easily changed according to the usage state.

[0008]

In order to solve the above-mentioned problems and achieve the above-mentioned object, a display device according to the present invention is detachably attached to a flat panel display section and a rear section of the flat panel display section. And a signal supply unit having a supporting leg, the signal supply unit being mounted to supply a video signal to the flat panel display unit, the signal supply unit supporting the support unit when mounted on the flat panel display unit. The flat display portion is supported while the posture is maintained by the legs.

Further, according to the present invention, in the above display device, the flat display portion is a display portion of a plasma addressed liquid crystal display device.

[0010]

In the display device according to the present invention, the signal having the signal supplying means and the supporting leg portion which are detachably attached to the back surface of the flat panel display section and supply the video signal to the flat panel display section. The supply section, when attached to the flat display section, maintains its posture by the support leg section,
Since the flat display unit is supported, the flat display unit can be maintained in a fixed posture.

Further, the flat display portion can be attached to a wall surface or the like when the signal supply portion is removed.

Then, in the above display device,
When the flat panel display section is used as a display section of a plasma addressed liquid crystal display device, the flat panel display section can be reduced in weight, and the posture can be maintained and the moving operation can be facilitated.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the display device according to the present invention comprises a flat display section 60. The flat panel display unit 60 has a rectangular liquid crystal display panel 1.
4 and a frame member 50 that supports the liquid crystal display panel 14. The frame member 50 has a front surface portion serving as an image display surface portion of the liquid crystal display panel 14 exposed to the outside and covers a peripheral portion and a rear surface portion of the liquid crystal display panel 14.

Speakers 44 and 45 are built in the frame member 50 on both sides of the liquid crystal display panel 14.

This display device is shown in FIG.
As shown in FIGS. 3 and 5, a tuner box 52 serving as a signal supply unit is detachably attached to the rear surface of the flat display unit 60. The tuner box 52 is configured by housing a tuner, which serves as a signal supply means for supplying a video signal to the flat panel display section 60, and a control circuit section described later in a housing. The tuner box 52 also has support legs 56 on the outside of the casing.

As shown in FIG. 5, the tuner box 56 has a plurality of engaging rods 54 on its front surface. Each of the engaging rods 54 is formed in a hook shape with its tip end side bent upward.

As shown in FIG. 4, the flat plate-shaped display portion 60 is provided with a mounting member 53 on the back surface of which a engaging slit 51 for engaging the engaging rods 54 is formed. Each of the engaging rods 54 is detachably engaged with the engaging slits 51 of the fitting 53.

The tuner box 52 is shown in FIGS.
As shown in FIG. 5, when mounted on the flat plate-shaped display unit 60, for example, when placed on a flat surface portion such as a floor surface, the flat plate shape is maintained while the posture is maintained by the support legs 56. The display unit 60 is supported. That is, the tuner box 52 is self-supporting and maintains the flat display unit 60 in a constant posture.

The flat display section 60 is shown in FIG. 6 when the tuner box 52 is removed.
As shown in FIG. 5, it can be attached to the wall surface 55 or the like in the room where the display device is installed via the attachment fitting 53. In this case, on the wall surface 55,
A supporting rod having the same structure as the engaging rod 54 is attached.

In each of the above-mentioned display devices, the liquid crystal display panel 14 of the flat display section 60 is
The display portion of the plasma addressed liquid crystal display device, that is, the plasma addressed liquid crystal display panel 14 can be used.

This plasma addressed liquid crystal display panel 14
Is the plasma chamber and the liquid crystal layer 5 as shown in FIGS.
Are laminated to form a plasma addressed liquid crystal display device as a kind of active matrix type liquid crystal display device using plasma.
This plasma addressed liquid crystal display device is disclosed in, for example, Japanese Patent Laid-Open No. 1-217396.

This plasma addressed liquid crystal display panel 14
In FIG. 7, the light from the backlight 1 serving as a light source is provided between the polarizing filter 2, the plasma chamber sandwiched between the back glass 3 and the thin glass plate 4, and between the thin glass plate 4 and the windshield 6. Are sequentially transmitted through the liquid crystal layer 5 encapsulated in, and led out to the outside of the front surface side through the polarization filter 7.

Light emitted outward from the backlight 1 is selectively transmitted in pixel units in the liquid crystal display structure,
By performing the cutoff control, a two-dimensional image display is performed. That is, a two-dimensional matrix is formed by transparent electrodes (ITO) 8 arranged in parallel in one direction (vertical direction in FIG. 7) and a plasma discharge pattern formed in a direction orthogonal to the arrangement direction of the transparent electrodes 8. Then, by selectively applying an electric field to the pixels of the liquid crystal layer at the intersections of the two-dimensional matrix to change the polarization direction, light in pixel units in the liquid crystal display structure including the polarization filters 2 and 7 is changed. Transmission and blocking control can be performed.

Each section will be described in more detail below. The backlight 1 acts as a light source from behind the plasma addressed liquid crystal display panel 14. By controlling the brightness of the backlight 1, it is possible to control the brightness of the image display surface portion.

The polarization filter 2 passes only the light of a predetermined polarization plane among the light of the backlight 1, and is the back surface of the back glass 3, that is, the backlight 1.
It is adhered to the side surface. The back glass 3 serves as a space for holding plasma, that is, as a support for the plasma chamber and has mechanical strength, and also contributes to the mechanical stability of the plasma addressed liquid crystal display panel 14.

The thin glass plate 4 facing the back glass 3 and sandwiching the plasma chamber, forms a boundary between the plasma chamber and the liquid crystal layer, is optically transparent, allows an electric field to pass therethrough, and causes plasma discharge. The electric field between the electrode formed by and the transparent electrode 8 effectively acts on the liquid crystal.

The liquid crystal layer 5 is formed by enclosing a liquid crystal material whose polarization direction is changed by an electric field between the thin glass plate 4 and the windshield 6. The windshield 6 seals the liquid crystal material and serves as a support for the transparent electrode 8.

The polarization filter 7 further polarizes the light generated by the backlight 1 and passing through the liquid crystal layer 5. The transparent electrode 8 is formed on the back surface of the windshield 6, that is, the surface on the liquid crystal layer 5 side in a stripe shape parallel to each other, and is used as one electrode for applying an electric field to the liquid crystal, and mainly ITO. It is made of an optically transparent and highly conductive material such as (indium tin oxide).

In the plasma chamber, a cathode electrode 9 and an anode electrode 10 are alternately arranged in a space formed by the back glass 3 and the thin glass plate 4 in a direction orthogonal to the arrangement direction of the transparent electrodes 8. Ribs arranged to form partition walls
Each electrode is separated by 2. The cathode electrode 9 is applied with a negative voltage when generating plasma and emits electrons. The anode electrode 10 is applied with a positive voltage when generating plasma.

In the example shown in FIG. 7, ribs 12 are formed on each anode electrode 10, and the tops of the ribs 12 are brought into contact with the back surface of the thin glass plate 4, that is, the surface on the back glass 3 side, so that the inside of the plasma chamber is covered. To function as a partition that separates the small compartment into a long and narrow chamber. This small chamber corresponds to the liquid crystal driving electrode on the plasma chamber side, and this small chamber is also called a discharge channel. An ionizable gas, such as helium, neon, or argon, or a mixed gas thereof is enclosed in the plasma chamber. When a predetermined voltage of, for example, about 300 V is applied between the cathode electrode 9 and the anode electrode 10 in a predetermined discharge channel, the gas in the discharge channel is ionized and plasma discharge is generated.

In the example shown in FIG. 7, ribs 12 serving as partition walls are formed only on the anode electrode 10, but ribs 12 serving as partition walls are formed on the cathode electrode 9 and the anode electrode 10, respectively. You may In this case,
A discharge channel is formed between the cathode electrode 9 and the anode electrode 10.

Now, the switch operation by plasma discharge in the plasma addressed liquid crystal display panel 14 will be further described. As shown in FIG. 8, the discharge channel in the plasma discharge state is caused by the action of the anode electrode 10 and the cathode electrode 9. A switch 11 corresponding to ON is formed, and is used for addressing the liquid crystal pixel together with the transparent electrode 8.

That is, the transparent electrode 8 and the discharge channel in the plasma chamber are used as the parallel electrodes in the row direction and the parallel electrodes in the column direction which are orthogonal to each other to form the two-dimensional matrix. Here, the inside of the discharge channel in which the plasma discharge is generated is substantially maintained at an anode potential, and when a data voltage is applied to the transparent electrode 8 in this state, a plurality of electrodes arranged in the column direction are formed corresponding to the discharge channel. A data voltage is written in the liquid crystal layer 5 of the pixel through the thin glass plate 4.

When the plasma discharge ends, the discharge channel becomes a floating potential, and the data voltage written in the liquid crystal layer 5 of each pixel is held until the next writing period, for example, one field later or one frame later. That is, the discharge channel functions as a sampling switch, and the liquid crystal layer 5 of each pixel functions as a sampling capacitor.

In the example shown in FIG. 8, the pixel of the liquid crystal layer corresponding to each discharge channel is shown as the liquid crystal pixel 5a,
Video signals S ₁ , S ₂ , S ₃ , S ₄ , S ₅ ... Are applied to the liquid crystal pixels 5 a as the data voltage via the transparent electrode 8.

A normal TFT type liquid crystal display panel uses a transparent electrode in both the row and column directions without using the plasma.

This plasma addressed liquid crystal display panel 14
As a more detailed structure of R, as shown in FIG.
A color filter 3 that performs color display by displaying three primary colors of (red), G (green), and B (blue) is provided.

The thickness of the liquid crystal layer 5, the thickness of the thin glass plate 4, the height of the ribs 12, the arrangement pitch L _P of the anode electrodes 10, which is the width of the discharge channels, and the width L of the cathode electrode 9. _C , the width L _A of the anode electrode 10, the width L _{1 of} the transparent electrode 8 and the arrangement pitch L ₂ of the transparent electrodes 8 are predetermined lengths.

The plasma addressed liquid crystal display panel 14 is driven by a control circuit as shown in FIG.

That is, the control circuit of this display device is connected to UHF and / or V via the antenna 15.
A UHF / VHF tuner 1 that is the above-mentioned tuner that receives an HF TV broadcast signal and converts it into a baseband video signal
6 is connected. The control circuit also receives a BS / CS broadcast signal via the parabolic antenna 17, converts the BS / CS broadcast signal into a baseband video signal, and demodulates a PCM audio signal. The BS / CS tuner 18 is the tuner. Are connected.

The tuners 16 and 18 are connected to the AV switch 22. The AV switch 22 selects video and audio signals coming from the outputs from the tuners 16 and 18 and external inputs. The AV switch 22 is connected to the comb filter 21. The comb filter 21 performs a three-dimensional YC separation operation. The comb filter 21 is connected to the YC switch 23.

The YC switch 23 has an S input terminal (S
1, 2, 3) 24 is switched between the luminance / color signal obtained from the input and the luminance / color signal of the output of the comb filter 21. The YC switch 23 is connected to the NTSC demodulator 25.

The NTSC demodulation unit 25 demodulates the color signal on the color carrier into a color difference signal, and the frame double speed processing unit 2
Send to 6. It should be noted that this is not limited to NTSC, for example, PA
It may be an L / SECAM signal.

The frame double speed processing unit 26 converts the interlaced scanning signal into a non-interlaced signal, further doubles the scanning speed, and sends it to the aspect conversion processing unit 27.

The aspect conversion processing section 27 performs aspect conversion processing such as zooming together with the image memory 28, further performs conversion of the display state of the screen such as zoom mode, and sends it to the HD / NTSC switch 29.

The video input terminals (videos 1, 2, 3) 19 connected to the AV switch 20 are connected to the NTS.
A normal type composite video signal such as C / PAL is supplied.
Further, the S input terminals (S1, 2, 3) 24 connected to the YC switch 23 are supplied with a video signal having separate luminance and color signals. Then, the comb filter 2
A YC output terminal 22 is connected to 1. This YC
The output of the comb filter 21 is supplied to the output terminal 22 for use in an external recording device or the like.

The HD / NTSC switch 29 has an H
The DTV input terminal 30 is connected. The HDTV input terminal 30 has a so-called MUSE system or MPEG.
A high-definition video signal obtained by decoding a digital video signal encoded by 2 or the like is supplied.

The HD / NTSC switch 29 selects the above-mentioned high-quality signal and the normal signal, and outputs the color signal conversion processing section 31.
Send to The color signal conversion processing unit 31 adjusts the color saturation, hue, etc., and sends it to the A / D converter 32. The A / D converter 32 converts an analog video signal into a digital signal.

The liquid crystal driver 34 supplied with a signal from the A / D converter 32 drives the side of the PALC panel where the conductive film such as the transparent electrode (ITO) 8 is provided.
Further, the liquid crystal control unit 35 generates a liquid crystal drive signal based on the synchronization signal and supplies it to the gamma correction unit 36 and the plasma driver 37.

The gamma correction section 36 performs gamma correction suitable for the liquid crystal panel. Further, the plasma driver 37
Drives the side of the PALC panel where the plasma switch is located. The plasma driver 37 requires a voltage of about 400V. This is because a high voltage is required to make the electric field applied to the liquid crystal material constant due to the thickness of glass or the like.

The plasma-addressed liquid crystal display panel 14 connected to the liquid crystal driver 34 and the plasma driver 37 has the above-mentioned structure and actually displays an image.

The backlight adjusting section 38 adjusts the screen brightness and the like by controlling the amount of light generated by the backlight 1. The screen display unit 39 displays characters / symbols such as a reception channel number, volume display, and menu display. The power supply unit 40 is supplied with power via a power supply plug 41, and generates various necessary voltages by a configuration such as a switching power supply.

The audio processing section 42 uses the AV switch 20.
Process the audio signal from, to set the volume, sound quality and sound field, and send it to the audio output unit 43. The audio output unit 43 amplifies the audio power and supplies it to the speakers 44 and 45. These speakers 44 and 45 convert electric signals into sound waves.

In this display device, the flat display section 60 is used as the display section of the plasma addressed liquid crystal display device, that is, the plasma addressed liquid crystal display panel 1.
By adopting the configuration having four, it is possible to reduce the weight of each of the flat panel display portions 60, and it is possible to reduce the weight of the entire device.

In this display device, the control circuit section can be arranged apart from the flat panel display section 60. In this case, the control circuit section may be arranged in the tuner box 52, or may be arranged in a separate room from the installation room in which the flat display section 60 is installed. The signal transmission from the control circuit section to the flat panel display section 60 may be based on any of a wired method (method performed via a signal cable) and a wireless method (method performed by radio waves).

Then, in this way, the flat display section 60 is formed.
When the control circuit section and the control circuit section are separately provided, the weight around the flat display section 60 can be further reduced, and the remote control can be easily performed via the control circuit section. You can

Further, in this display device,
The control circuit section may be integrated with the flat panel display section 60. In this case, it is possible to reduce the wiring between the flat panel display unit 60 and the outside and install it.

[0059]

As described above, in the display device according to the present invention, the signal supplying means is detachably attached to the back surface of the flat panel display section and supplies the video signal to the flat panel display section. And the signal supply unit having the support leg section, when attached to the flat panel display section, supports the flat panel display section while maintaining the posture by the support leg section.

Therefore, the signal supply section can maintain the flat display section in a constant posture.

Further, the flat display section can be attached to a wall surface or the like when the signal supply section is removed.

In the above display device,
When the flat panel display section is used as a display section of a plasma addressed liquid crystal display device, the flat panel display section can be reduced in weight and the posture can be maintained and the moving operation can be facilitated. .

That is, according to the present invention, the device configuration is downsized,
Weight reduction, selection of installation location, movement of installation location, storage,
Further, it is possible to provide a display device which can be easily transported and in which the direction of each display portion can be easily changed according to the usage state.

[Brief description of drawings]

FIG. 1 is a front view showing a configuration of a display device according to the present invention.

FIG. 2 is a side view showing a configuration of the display device.

FIG. 3 is a rear view showing the configuration of the display device.

FIG. 4 is a rear view showing a state where the tuner box is removed from the display device.

FIG. 5 is a vertical cross-sectional view showing the configuration of the display device as seen from the side surface side.

FIG. 6 is a front view showing a state in which only the flat panel-shaped display portion of the display device is attached to a wall surface.

FIG. 7 is an enlarged exploded perspective view of a main part showing a configuration of a flat-panel display portion of the display device.

FIG. 8 is a side view schematically showing the configuration and operating principle of the flat display unit.

FIG. 9 is an enlarged perspective view of an essential part showing the configuration of the flat display unit.

FIG. 10 is a block diagram showing a configuration of a plasma addressed liquid crystal display device in the display device.

[Explanation of symbols]

 14 Plasma Address Liquid Crystal Display Panel 50 Housing 52 Tuner Box 54 Hanging Rod 55 Wall 56 Support Leg 60 Flat Display

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazumi Isono 6-735 Kitashinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (2)

[Claims] 1. A flat panel display part, and a signal supply means and a support leg part which are detachably attached to the back surface part of the flat panel display part and which supply a video signal to the flat plate display part. A display device, comprising: a signal supply unit, wherein the signal supply unit supports the flat display unit while being attached to the flat display unit while maintaining its posture by the support legs. 2. The display device according to claim 1, wherein the flat display portion is a display portion of a plasma addressed liquid crystal display device.