JPH095720A - Display device - Google Patents

Abstract

PURPOSE: To provide a display device capable of being housed in a ceiling in the case of not being used, capable of being drawn down from the ceiling in the case of being used, and capable of being used as illumination in the case of being housed in the ceiling. CONSTITUTION: This plasma address liquid crystal display device 60 is hung on the ceiling 52 by a flexible arm 51, and is housed in a housing part 50 provided on the ceiling 52 in a state where the display surface is in the same surface as the ceiling surface 52 in the case of not being used.

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.

If the display device is to be housed in the wall surface of the room or behind the ceiling, large-scale construction is required.

Further, in the above display device, it is difficult to change the direction of the display portion according to the use condition 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 apparatus configuration is downsized and lightened, and it is easy to select the installation site, move the installation site, store and transport. It is also an object of the present invention to provide a display device that can be easily changed and the direction of the display unit can be easily changed according to the usage state.

[0009]

In order to solve the above problems and achieve the above object, a display device according to the present invention comprises a movably supported flat display portion, and the flat display portion comprises: The flat display unit is housed in a storage unit provided in the ceiling of the room where the display surface is flush with the ceiling.

Further, according to the present invention, in the display device, the flat panel display section has a light emitting means for illuminating a display performed by the flat panel display section, and when the flat panel display section is stored in the storage section, The lower side of the flat display section is illuminated by the light emitted from the light emitting means.

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.

Further, according to the present invention, in the display device, the control circuit portion of the plasma addressed liquid crystal display device is integrally arranged on a flat display portion supported by a member forming the ceiling via a supporting member. That is what has been done.

Further, according to the present invention, in the display device, the control circuit part of the plasma addressed liquid crystal display device is separated from the flat plate display part and is embedded in the ceiling to support the flat plate display part. It is arranged in the main body.

[0014]

In the display device according to the present invention, the movably supported flat panel display unit has the display surface section with respect to the ceiling in the storage section provided in the ceiling of the room where the flat panel display unit is present. Since they are stored flush with each other, they are stored in the storage portion without protruding from the ceiling.

Further, in the above display device, the flat panel display section has a light emitting means for illuminating a display performed by the flat panel display section, and when the flat panel display section is housed in the housing section, When the lower side of the flat display section is illuminated with the emitted light,
When the image is not displayed, it can be used as a lighting fixture.

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 lightened and the moving operation becomes easy.

Further, in the above display device,
When the control circuit part of the plasma addressed liquid crystal display device is integrally arranged on the flat panel display part which is supported by the member forming the ceiling via the supporting member, the wiring for the outside is reduced and installed. be able to.

Further, in the above display device, the control circuit part of the plasma addressed liquid crystal display device is disposed in the main body part which is embedded in the ceiling and supports the flat plate display part, apart from the flat plate display part. If set,
It is possible to further reduce the weight around each of the flat plate-shaped display portions, and it becomes easy to perform remote operation via the control circuit portion.

[0019]

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

As shown in FIGS. 1 and 3, the display device according to the present invention comprises a flat display section 60. The flat panel display unit 60 is composed of a rectangular liquid crystal display panel 14 and a frame member that supports the liquid crystal display panel 14. The frame member 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.

A speaker is built in the frame member constituting the flat display section 60.

Then, as shown in FIGS. 3 to 5, the flat display section 60 is supported at its back surface via a flexible arm 51 which serves as a support member. The flexible arm 51 has a plurality of annular members sequentially arranged in a layered manner so as to form an arm. The respective annular members are movably connected to each other, so that the bending displacement is possible. Has become. In addition, this flexible arm 51
Due to the frictional force between the annular members, the bent state is maintained until the weight exceeds a predetermined value.

As shown in FIGS. 4 and 5, one end of the flexible arm 51 is attached to the back surface of the flat display portion 60 via a mounting member 56, and the other end thereof is
It is fixed via a fixing member 55 to the inside of the ceiling where the display device is installed.

The ceiling 52 is provided with an opening-like storage section 50 having a size and shape corresponding to the flat display section 60. The storage portion 50 is provided near the fixed position on the other end side of the flexible arm 51.

As shown in FIGS. 1 and 4, the flat plate-shaped display section 60 is displaced from the storage section 50 by the displacement of the flexible arm 51.
As shown in FIGS. 3 and 5, it is movable over a state of being suspended from the ceiling 52.

When the flat panel display unit 60 is hung down by the ceiling 52, the flat screen display unit 60 is in a state of displaying a video image to a viewer in the room with the video image display surface section facing substantially sideways. In addition, at this time, the flat plate-shaped display section 60 can freely adjust the direction of the image display surface section by displacing the flexible arm 51.

The flat panel display section 60 includes the storage section 50.
When housed inside, the image display surface portion is on the lower surface side, and the image display surface portion is flush with the ceiling 52. Therefore, in this display device, the flat plate-shaped display portion 60 can be stored in the storage portion 50 without protruding from the ceiling 52.

In this display device, since the flat display portion 60 is thinly configured as the storage portion 50, the storage portion 50 need only have a short depth, that is, a shallow depth, which is not a large scale for the ceiling 52. No construction required.

The flat panel display section 60 has a backlight 1 as a light emitting means for illuminating the display performed by the flat panel display section 60, as will be described later. Therefore, as shown in FIG. 2, when the flat panel display section 60 is stored in the storage section 50, the flat panel display section 60 is below the flat panel display section 60 by the illumination light 54 emitted from the backlight 1. Can be illuminated.

In other words, this display device is transparent, in particular, when the flat panel display section 60 does not display an image, the image display surface section displays white over the entire surface. Therefore, the backlight 1 can be emitted to be used as a lighting fixture.

As the supporting member for supporting the flat display section 60, a pantograph mechanism composed of a plurality of links as described in JP-A-62-51880 can be used. That is, in the pantograph mechanism, the lower ends of the plurality of lower links are rotatably attached to the back surface portion of the flat panel display unit 60. The lower ends of the upper links are rotatably connected to the upper ends of the lower links.
The upper ends of these upper links are rotatably attached to a ceiling portion arranged above the ceiling 52.

In this pantograph mechanism, the flat display portion 6 is formed by rotating the links with each other.
0 can be moved in the vertical direction, and the direction of the image display surface of the flat display unit 60 can be variably adjusted.

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 a plasma chamber and a 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. 6, as shown in FIG. 6, 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 4, the thin glass 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.

The 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 composed of transparent electrodes (ITO) 8 arranged in parallel in one direction (vertical direction in FIG. 6) 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 and 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. 6, ribs 12 are formed on each anode electrode 10, and the tops of these 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, and the inside of the plasma chamber. 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 of FIG. 6, the ribs 12 serving as partition walls are formed only on the anode electrode 10, but the 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.

The switch operation by plasma discharge in the plasma addressed liquid crystal display panel 14 will be further described below. As shown in FIG. 7, 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, after one field or one frame. 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. 7, the pixels of the liquid crystal layer corresponding to each discharge channel are shown as liquid crystal pixels 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 above 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 provided with UHF and / or V via the antenna 15.
A UHF / VHF tuner 16 that receives an HF TV broadcast signal and converts it into a baseband video signal is connected. Further, the control circuit receives a BS / CS broadcast signal via the parabolic antenna 17 to convert it into a baseband video signal, and demodulates a PCM audio signal B
The S / CS tuner 18 is 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 unit 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 a normal signal, and selects 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 on which 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 unit 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 structure as described above and actually displays an image.

The backlight adjusting section 38 adjusts the screen brightness and the like by controlling the light amount of the 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 audio power and supplies the amplified audio power to the speakers 44, 45, and 46. The speakers 44, 45, 46 convert electric signals into sound waves.

In this display device, the flat plate-shaped display portion 60 is used as the display portion 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 integrally provided on 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.

Further, in this display device,
The control circuit section may be arranged apart from the flat panel display section 60. In this case, the control circuit section can be arranged in the main body section embedded in the ceiling of the installation room in which the flat display section 60 is installed, or in a separate room from the installation room. 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

[0071]

As described above, in the display device according to the present invention, the movably supported flat panel display section is displayed in the storage section provided on the ceiling of the room where the flat panel display section is located. It is stored in a state where the surface portion is flush with the ceiling.

Therefore, the display device can be stored in the storage portion without protruding from the ceiling. Further, in this display device, since the flat display portion is configured to be thin as the storage portion, the display portion has a short depth and does not require large-scale construction for the ceiling.

Further, in the above display device, the flat panel display section has a light emitting means for illuminating the display performed by the flat panel display section, and when the flat panel display section is housed in the housing section, When the lower side of the flat display section is illuminated with the emitted light,
When the image is not displayed, it can be used as a lighting fixture.

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 moving operation can be facilitated.

Further, in the above display device,
When the control circuit part of the plasma addressed liquid crystal display device is integrally arranged on the flat panel display part which is supported by the member forming the ceiling via the supporting member, the wiring for the outside is reduced and installed. be able to.

Further, in the above display device, the control circuit part of the plasma addressed liquid crystal display device is arranged in a main body part which is embedded in the ceiling and supports the flat plate display part, apart from the flat plate display part. If set,
It is possible to further reduce the weight around each of the flat plate-shaped display portions, and it becomes easy to perform remote operation via the control circuit portion.

That is, according to the present invention, the device configuration is reduced in size,
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 the display portion can be easily changed according to the usage state.

[Brief description of drawings]

FIG. 1 is a perspective view showing a storage state of a display device according to the present invention in a storage portion.

FIG. 2 is a perspective view showing a state in which the display device is used as lighting for a ceiling.

FIG. 3 is a perspective view showing a usage state of the display device.

FIG. 4 is a vertical cross-sectional view showing a storage state of the display device in a storage portion.

FIG. 5 is a vertical cross-sectional view showing a usage state of the display device.

FIG. 6 is an enlarged exploded perspective view of an essential part showing a configuration of a flat-panel display portion of the display device.

FIG. 7 is a side view schematically showing the configuration and operating principle of the flat display unit.

FIG. 8 is an enlarged perspective view of an essential part showing the configuration of the flat display unit.

FIG. 9 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 Storage 51 Flexible Arm 52 Ceiling 54 Illumination Light 60 Flat Display

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location H04N 5/64 521 H04N 5/64 521P (72) Inventor Kazumi Isono 6-chome Kita-Shinagawa, Shinagawa-ku, Tokyo 7th 35th Sony Corporation

Claims (5)

[Claims] 1. A flat display part movably supported is provided, and the flat display part has a display surface part with respect to the ceiling in a storage part provided in a ceiling in a room where the flat display part is present. A display device that is designed to be stored in a flat surface. 2. The flat panel display section has a light emitting means for illuminating the display performed by the flat panel display section, and when the flat panel display section is housed in the housing section, the flat panel display section emits light by the light emitting means.
The display device according to claim 1, wherein the lower side of the flat display portion is illuminated. 3. The display device according to claim 1, wherein the flat panel display unit is a display unit of a plasma addressed liquid crystal display device. 4. The display device according to claim 2, wherein the control circuit portion of the plasma addressed liquid crystal display device is integrally arranged on a flat plate-shaped display portion supported by a member forming a ceiling via a supporting member. 5. The control circuit section of the plasma addressed liquid crystal display device is separated from the flat panel display section, is embedded in the ceiling, and is disposed in a main body section that supports the flat panel display section. Display device.