JPH09325326A - Liquid crystal device and information transmission device equipped with liquid crystal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the static pressure of a gelling substance from affecting the liquid crystal device. SOLUTION: A front glass plate 3a and a rear glass plate 3b are arranged on both the display surface side and back surface side of a couple of electrode substrates 2a and 2b and transparent gelling substances 4a and 4b are charged between both the top surfaces of electrode substrates 2a and 2b, and the front glass plate 3a and rear glass plate 3b. Consequently, the gelling substances 4a and 4b balance in static pressure between the display surface side and back surface side of the electrode substrates 2a and 2b to prevent the electrode substrates 2a and 2b from bending.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal device in which liquid crystal is sandwiched between a pair of substrates and an information transmission device including the liquid crystal device.

[0002]

2. Description of the Related Art In a projection type display using a CRT (Cathode-Ray Tube), a projection display and a CRT surface have been conventionally used to reduce an optical loss by eliminating an air interface between the CRT surface and a projection lens. It has been proposed to fill the space between the lenses with a transparent liquid to reduce optical loss (for example, Japanese Patent Laid-Open No. 6-125520). Such a technique is called optical coupling and is expected to be applied to a liquid crystal display device.

Regarding the application of this optical coupling to a liquid crystal display device, in order to reduce reflection of external light on the display surface of the liquid crystal display device, a protective plate (a protective glass plate or a transparent plate disposed in front of the display surface is used. Filling the space between the acrylic resin plate) with a silicon-based transparent liquid or a transparent gel-like substance is under study. In particular, a transparent gel-like substance can be suitably used as a filling substance without any fear of leakage as in the case of using a transparent liquid.

[0004]

When the above optical coupling is applied to a liquid crystal display device, as described above, conventionally, a transparent gel is provided in the space between the display surface and the protective plate disposed in front of the display surface. Because of the structure that fills the particulate matter,
In particular, in the case of a liquid crystal display device having a large display surface, there is a problem that the static pressure due to the transparent gel-like substance is applied to the display surface and the like of the liquid crystal display device at a non-negligible level.

Further, the stress on the display surface of the liquid crystal display device due to the static pressure of the gel-like substance causes the TAB of the peripheral circuit board.
There is also a risk of breaking the joint. Further, the static pressure of the gel-like substance causes the display surface of the liquid crystal display device and the protective plate arranged in front of it to bend, and the space between the display surface and the protective plate slightly expands, and the transparent space filled in the space is transparent. The gel-like substance may slide down due to its own weight.

Further, there is also a problem that the deflection of the display surface of the liquid crystal display device due to the static pressure of the gel-like substance adversely affects the alignment of the liquid crystal and impairs the display performance.

Therefore, the present invention provides a liquid crystal device capable of performing a good display without applying a static pressure due to a gel-like substance to a display surface even when the above-mentioned optical coupling is applied to the liquid crystal display device. An object is to provide an information transmission device including a liquid crystal device.

[0008]

The present invention has been made in view of the above circumstances, and has a pair of substrates arranged to face each other, and a liquid crystal sandwiched between the pair of substrates. In the liquid crystal device, a first transparent plate-shaped member and a second transparent plate-shaped member are respectively disposed on both the display surface side and the back surface side of the pair of substrates, and the both surfaces of the pair of substrates and the The gel-like substance is filled between the first transparent plate-shaped member and the second transparent plate-shaped member, and the gel-like substance filled between the display surface side of the substrate and the first transparent plate-shaped member is transparent. The feature is that it is a gel.

Further, it is characterized in that a movement preventing means for preventing the movement of the gel-like substance is provided along the outside of the end surface of the gel-like substance.

The back side of the pair of substrates and the second side
The gel-like substance filled between the transparent plate-like member and the transparent plate-like member is semitransparent and has a light scattering property.

Further, the information transmission device according to the present invention includes a graphic controller for outputting an image data signal and a scanning method signal, a scanning signal control circuit for outputting scanning line address data and a scanning method signal, a display data and a scanning method. It is characterized by having an information signal control circuit for outputting a signal and any one of the liquid crystal devices described above.

[0012]

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

FIG. 1 is a schematic sectional view showing a liquid crystal display device which is a liquid crystal device according to a first embodiment of the present invention.
The liquid crystal display device 1 includes a pair of electrode substrates 2 arranged to face each other.
a, 2b, a quadrangular front glass plate 3a, a rear glass plate 3b respectively arranged on both surface sides thereof, and an electrode substrate 2
a and the front glass plate 3a and the entire surface between the electrode substrate 2b and the rear glass plate 3b with a thickness of 1 to 10 mm, preferably about 3 mm, and the transparent gel-like substances 4a and 4b of silicon type, and the rear surface. It has a backlight device 6 and the like having a plurality of light sources 5 arranged on the back side of the glass plate 3b, and these are mounted in an outer case 7.

A liquid crystal (not shown) is sandwiched between the electrode substrates 2a and 2b, and transparent electrodes, alignment films and the like (not shown) are formed on the electrode substrates 2a and 2b. A polarizing plate (not shown) is arranged outside the electrode substrates 2a and 2b.

The transparent gel-like substance 4a is formed on the front glass plate 3
a is filled in the entire space between the display-side electrode substrate 2a and the transparent gel substance 4b is filled in the entire space between the rear glass plate 3b and the rear-side electrode substrate 2b. Therefore, optical couplings are formed on both surfaces of the electrode substrates 2a and 2b. Further, the front glass plate 3a and the rear glass plate 3b serve as protective glass for protecting the electrode substrates 2a and 2b.

The liquid crystal display device 1 according to the present embodiment is configured as described above, and by applying a drive voltage waveform to the liquid crystal (not shown) between the electrode substrates 2a and 2b, an image is displayed from the back side. It is illuminated by the backlight device 6 and displayed. At this time, by filling the space between the front glass plate 3a and the electrode substrate 2a on the display surface side with the transparent gel substance 4a, the air interface in this space is eliminated and the reflection of external light is greatly reduced. Therefore, the visibility can be improved. In addition, the rear glass plate 3b and the rear electrode substrate 2
By filling the transparent gel-like substance 4b in the space between b and b, the air interface in this gap is eliminated, optical loss is reduced, and the illumination efficiency of the backlight device 6 can be improved.

Further, a transparent gel substance 4a, is formed on the entire surface between the front glass plate 3a and the electrode substrate 2a on the display surface side and on the entire surface between the rear glass plate 3b and the electrode substrate 2b on the rear surface side.
4b, respectively, so that the electrode substrates 2a, 2
Since the static pressures of the gel-like substances 4a and 4b on both surfaces of b are canceled and balanced, the electrode substrates 2a and 2b can be balanced even in the case of a liquid crystal display device having a large display surface.
B is not bent to adversely affect the orientation of the liquid crystal, and stress that may break the TAB joint portion of the peripheral circuit board is not generated, and stable and good display can be performed.

Further, since the transparent gel-like substances 4a and 4b filled on both surfaces of the electrode substrates 2a and 2b have very excellent shock absorption and vibration damping property, the liquid crystal display. Even when a mechanical shock or vibration is applied to the device 1 from the outside, they can be reduced. In particular, when a ferroelectric liquid crystal having a very narrow substrate gap of about several μm is used as the liquid crystal sandwiched between the electrode substrates 2a and 2b, this is a great advantage.

The above-mentioned transparent gel-like substances 4a, 4b
Although a silicon-based gel was used, the present invention is not limited to this and, for example, an SBR-based gel, an acrylic-based gel, or the like can also be used in addition to this.

Further, by applying the AR treatment to the outer surfaces of the front glass plate 3a and the rear glass plate 3b, the effect of preventing the reflection of external light and the backlight device 6 are provided.
It is possible to further improve the illumination efficiency.

FIG. 2 is a schematic sectional view showing a liquid crystal display device according to the second embodiment, and FIG. 3 is a schematic plan view thereof.
The liquid crystal display device 10 is the liquid crystal display device 1 shown in FIG.
On the other hand, the front glass plate 3a and the electrode substrate 2a on the display surface side
Between the entire surface, the rear glass plate 3b and the rear side electrode substrate 2b
Gel stoppers 11a, 1 made of sponge rubber for preventing movement of the gel-like substances 4a, 4b along the entire outer circumference of the end faces of the transparent gel-like substances 4a, 4b filled in the entire space
1b is provided respectively. Other configurations are similar to those of the liquid crystal display device 1 according to the first embodiment shown in FIG.

The gel stoppers 11a and 11b are adhesively fixed to the outer peripheral side between the front glass plate 3a and the electrode substrate 2a and the outer peripheral side between the rear glass plate 3b and the electrode substrate 2b by double-sided tape (not shown). . Further, a slight gap is formed between the gel-like substances 4a and 4b and the gel stoppers 11a and 11b so that the gel-like substances 4a and 4b can be moved a little. This gap is
The sizes of the end surfaces of a and 4b are set so that they do not enter the exposed regions of the front glass plate 3a and the rear glass plate 3b that are not hidden by the outer case 7.

As described above, in the liquid crystal display device 10 according to this embodiment, the gel stoppers 11a and 11b for restricting the moving range of the transparent gel-like substances 4a and 4b are provided. In addition to the effects obtained by the liquid crystal display device 1 according to the present invention, when some external force such as the self-weight of the gel-like substances 4a and 4b or an impact is applied to the gel-like substances 4a and 4b, the gel-like substances 4a and 4b are displaced. However, the gel-like substances 4a and 4b are formed by the gel stoppers 11a and 11b.
It is possible to prevent the shear movement beyond the allowable range.

FIG. 4 is a schematic plan view of a liquid crystal display device according to the third embodiment. This liquid crystal display device 20 is different from the liquid crystal display device 10 according to the second embodiment shown in FIGS. 2 and 3 between a front glass plate 3a and a display surface side electrode substrate 2a (not shown). Gel stoppers 12a, 12b, 12c, 12d made of sponge rubber for preventing movement of the gel-like substance 4a by providing a slight gap along the outer side of the end face of each side of the rectangular transparent gel-like substance 4a to be arranged.
Are provided respectively.

Gel stoppers 12a, 12b, 12c,
The corner of 12d of gel-like substance 4a is opened to expose the corner of gel-like substance 4a. Incidentally, a gel stopper arranged between the rear glass plate and the electrode substrate 2b on the rear side is also formed in the same manner. Other configurations are shown in FIG.
The liquid crystal display device 10 according to the second embodiment shown in FIG.
Is the same as

As described above, in the liquid crystal display device 20 according to the present embodiment, the gel stoppers 12a, 12b, 12c, 12d of the portions located at the corners of the transparent gel substance 4a are formed.
By opening the openings, in addition to the effects obtained by the liquid crystal display devices 1 and 10 according to the first and second embodiments, the ambient atmosphere of the gel substances 4a and 4b becomes the same as the atmospheric pressure and always balances. Therefore, it is possible to prevent the distortion of the gel substances 4a and 4b.

Further, in this embodiment, the gel-like substances 4a, 4 of the gel stoppers 12a, 12b, 12c, 12d.
Although the portion located at the corner of b is opened, it is also possible to open any portion of the gel stoppers 12a, 12b, 12c, 12d to balance the atmosphere around the gel substance 4a with the atmospheric pressure. it can.

In the second and third embodiments described above, gel stoppers 11a, 11b, 12a, 12 are used.
Although sponge rubber is used as b, 12c and 12d, the sponge rubber is not limited to this. For example, a member having rigidity that can prevent the transparent gel substances 4a and 4b from moving is also used. You can also

FIG. 5 is a schematic sectional view showing a liquid crystal display device according to the fourth embodiment. This liquid crystal display device 21
In contrast to the liquid crystal display device 1 according to the first embodiment shown in FIG. 1, is a rear glass plate 3b and a rear electrode substrate 2b.
The entire surface of the space is filled with a milky white translucent gel-like substance 4c. Other configurations are similar to those of the liquid crystal display device 1 according to the first embodiment shown in FIG.

The semi-transparent gel material 4c is a transparent silicon gel material to which a transparent or white filler is added and has a light scattering property.

As described above, in the liquid crystal display device 21 according to this embodiment, the milky white translucent gel-like substance 4 having a light scattering property is provided between the rear glass plate 3b and the electrode substrate 2b.
In addition to the effects obtained by the liquid crystal display device 1 according to the first embodiment, the backlight device 6 has a configuration in which c is filled.
It is possible to expand the light distribution characteristic of No. 2 by a predetermined amount, reduce the uneven brightness of the illumination light, and emit light with good brightness uniformity.

In the present embodiment, the milky white translucent gel-like substance 4c filled between the rear glass plate 3b and the glass substrate 8b may be, for example, an SBR-based gel other than the above-mentioned silicon-based gel. It is also possible to use a gel or acrylic gel. The same applies to the filler material, and the means for generating light scattering may be a method other than the above-described addition of filler such as foaming.

FIG. 6 is a block diagram showing the configuration of an information transmission device equipped with the above-described liquid crystal display device according to the present invention. The information transmission device 30 includes, for example, the above-described liquid crystal display device 1, a drive control unit 31, and a graphic controller 32.

The liquid crystal display device 1 is, for example, 1280 × 11.
It has 20 pixels, and each pixel is composed of an intersection of a transparent electrode (scan electrode) and a transparent electrode (signal electrode) (not shown) arranged in a simple matrix.

The drive control unit 31 includes the scanning signal applying circuit 3
3, an information signal application circuit 34, a scanning signal control circuit 35, an information signal control circuit 36, and a drive control circuit 37. The scanning signal control circuit 35 and the information signal control circuit 36
, Image data, a scanning method signal (AH / DL signal), and the like are input from the graphic controller 32 via the drive control circuit 37. The image data is converted into scanning line address data and display data by the scanning signal control circuit 35 and the information signal control circuit 36, and the scanning method signal is directly input to the scanning signal applying circuit 33 and the information signal applying circuit 34. It Further, the scanning signal application circuit 33 applies a scanning signal having a waveform determined by the scanning method signal to a transparent electrode (scanning electrode) (not shown) of the liquid crystal display device 1 determined by the scanning line address data, and the information signal application circuit 34.
Is controlled so as to apply an information signal having a waveform determined by two of a white or black display content sent by display data and a scanning method signal to a transparent electrode (signal electrode) (not shown) of the liquid crystal display device 1. The image is displayed on the screen composed of the pixels. Incidentally, the SYNC signal is supplied to the drive control unit 31.
And the graphic controller 32 are synchronized with each other.

The information transmission device 30 according to the present embodiment is
Since the liquid crystal display device 1 according to the present invention described above is provided, the electrode substrate is prevented from bending due to the static pressure of the gel-like substance, and good display can be performed.

[0037]

As described above, according to the present invention,
A first transparent plate-shaped member and a second transparent plate-shaped member are arranged on both the display surface side and the rear surface side of the pair of substrates, respectively, and both surfaces of the pair of substrates and the first and second transparent plates are arranged. The gel-like substance filled between the display member of the substrate and the first transparent plate-like member is made of a transparent gel so that optical coupling can be achieved. The static pressure due to the gel-like substance that forms is balanced and balanced on both the display surface side and the back surface side of the pair of substrates, so that the pair of substrates sandwiching the liquid crystal is prevented from bending and the alignment of the liquid crystal is adversely affected. Without a problem, stable and good display can be performed.

Further, by filling the gel-like substance on both surface sides of the pair of substrates, it is possible to improve the shock absorption and the vibration isolation, and further reduce the reflection of external light on the display surface. The visibility can be improved.

Further, in the information transmission device equipped with the liquid crystal device according to the present invention, since the liquid crystal device is prevented from bending due to the static pressure of the gel-like substance and the alignment of the liquid crystal is not adversely affected, the entire display surface is prevented. Good display can be performed over the entire range.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a schematic sectional view showing a liquid crystal display device according to a second embodiment of the present invention.

FIG. 3 is a schematic plan view of a liquid crystal display device according to a second embodiment of the present invention.

FIG. 4 is a schematic plan view of a liquid crystal display device according to a third embodiment of the present invention.

FIG. 5 is a schematic cross-sectional view of a liquid crystal display device according to a fourth embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of an information transmission device according to the present invention.

[Explanation of symbols]

1, 10, 20, 21 Liquid crystal display device (liquid crystal device) 2a, 2b Electrode substrate 3a Front glass plate (first transparent plate member) 3b Rear glass plate (second transparent plate member) 4a, 4b Transparent Gel substance 4c Semi-transparent gel substance 6 Backlight device 11a, 11b, 12a, 12b, 12c, 12d Gel stopper (movement preventing means) 30 Information transmission device

Claims (10)

[Claims] 1. A liquid crystal device having a pair of substrates arranged so as to face each other and a liquid crystal sandwiched between the pair of substrates, wherein both surfaces of the pair of substrates on a display surface side and a rear surface side are provided. A first transparent plate-shaped member and a second transparent plate-shaped member respectively,
A gel-like substance is filled between both surfaces of the pair of substrates and the first and second transparent plate-shaped members, respectively, and a space between the display surface side of the substrate and the first transparent plate-shaped member is filled. A liquid crystal device, wherein the filled gel material is a transparent gel. 2. The liquid crystal device according to claim 1, wherein the gel substance is a silicon-based gel. 3. The liquid crystal device according to claim 1, wherein a backlight device is arranged on the back side of the second transparent plate-shaped member arranged on the back side of the pair of substrates. 4. The liquid crystal device according to claim 1, wherein the first and second transparent plate-shaped members are glass plates. 5. The liquid crystal device according to claim 1, further comprising a movement preventing unit that prevents movement of the gel-like substance along the outside of the end surface of the gel-like substance. 6. The liquid crystal device according to claim 5, wherein the movement preventing unit is formed of sponge rubber. 7. The liquid crystal device according to claim 5, wherein the movement preventing means is formed along the entire outer periphery of the end surface of the gel-like substance. 8. The liquid crystal device according to claim 5, wherein the movement preventing means is formed along the outer side of the end surface of the gel-like substance with a gap provided in a part thereof. 9. The gel-like substance filled between the back side of the pair of substrates and the second transparent plate-like member is semitransparent and has a light-scattering property. 9. The liquid crystal device according to claim 8. 10. A graphic controller for outputting an image data signal and a scanning method signal, a scanning signal control circuit for outputting scanning line address data and a scanning method signal, and an information signal control circuit for outputting display data and a scanning method signal. An information transmission device comprising: the liquid crystal device according to any one of claims 1 to 9.