JPS62283317A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To make the whole device thin while providing glare proof effect by arranging a liquid crystal cell which has a display surface in the front so that the display surface is curved toward a rear surface from the upper end edge part of the liquid crystal cell to the lower end edge part. CONSTITUTION:A liquid crystal display device 1 has the liquid crystal cell 11 put fixedly between a fixed member 2 and a cell pressure member 7 so that the display surface of the liquid crystal cell 11 slanting downward below the direction of the line of sight of a driver is curved toward the rear surface from the upper end edge part of the liquid crystal cell to the lower end edge part. Consequently an external light beam incident from the display surface is reflected by the display surface of the liquid crystal cell 11 beyond the visual field of a view position to prevent an image formed under the influence of the external light beam, thereby obtaining glare proof effect. Further, the liquid crystal cell 11 is curved to reduce the depth in front of the display surface as compared with a conventional example where in a front hood, etc., are provided.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a liquid crystal display device, and more particularly to an anti-glare structure of a liquid crystal cell containing liquid crystal.

(Prior art and its problems) In general, a liquid crystal display device that uses liquid crystal to display a display consists of a liquid crystal cell, which is formed by sealing liquid crystal between a pair of glass substrates with electrodes formed on opposing surfaces. By selectively applying a voltage, the molecular alignment direction of the liquid crystal is changed, thereby controlling the light transmission state and performing a predetermined display according to the shape of the electrode to which the voltage is applied.

When the liquid crystal display device having the above structure is used as a vehicle instrument such as an automobile, the front surface of the liquid crystal cell serving as the display surface is formed using a glass substrate. There is a problem in that the display overlaps with the display section and becomes visible, making it difficult to read the display section.

In order to prevent portholes caused by surface reflections of the glass substrate, the liquid crystal cell may be arranged so as to be tilted upward with respect to the direction of the driver's line of sight, or the display surface may be covered in front of the display surface of the liquid crystal cell. A transparent front hood is provided, and the front hood is configured to obtain an anti-glare effect by guiding external light reflected by the driver's crystal cell or tttz out of the field of view in a direction other than the driver's line of sight.

However, the depth dimension of the liquid crystal display device with the above-mentioned configuration increases, and the device itself becomes large, resulting in a problem that the interior space of the vehicle cannot be used effectively.

Therefore, when trying to make a liquid crystal display device thinner and also have an anti-glare function, the liquid crystal cell is arranged almost perpendicular to the direction of the driver's line of sight, and the surface of the glass substrate is coated with a cape or multi-layered. A structure has also been proposed in which the glass substrate itself has an anti-glare function by applying anti-glare treatment such as thin film coating.

However, when applying anti-glare treatment such as matte treatment or multilayer thin film coating to the surface of the glass substrate, not only does it increase the number of work steps, making it expensive, but it also reduces the brightness of the display surface of the liquid crystal cell. There is a problem that the display state is blurred and difficult to see.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a liquid crystal display device that can be made thinner, has less installation space, and has an anti-glare function and has good visibility.

(Means for Solving the Problem) The present invention provides a liquid crystal cell having a front surface as a display surface, the display surface of which is curved toward the rear surface from the upper edge of the liquid crystal cell toward the lower edge of the liquid crystal cell. is arranged between the cell pressing member and the fixing member.

(Function) Since the liquid crystal cell is arranged in a curved manner, external light rays reflected on the front surface of the liquid crystal cell are guided out of the field of view (and reflections due to the influence of external light rays are prevented, resulting in good visibility.

(Example) Hereinafter, the present invention will be described in detail based on the accompanying drawings.

1 to 4 show an embodiment of the present invention, in which a liquid crystal display device 1 includes a low box-shaped fixing member 2 formed of resin to serve as a mounting reference member for its component parts. , a flat light diffusing plate 4 disposed at the front end of the fixing member 2 and made of a semi-transparent resin to diffuse the light from the light source 3 disposed inside the fixing member 2; A flat color filter formed of resin, which is disposed on the front surface of the plate 4 and has colored areas corresponding to the display area so as to color the display appearing on the display area of the liquid crystal cell described later in a desired color. 5,
A cell holding member 7 and a fixing member 2 are disposed on the front surface of the fixing member 2 and are formed of resin so as to be held in contact with the front peripheral edge of a liquid crystal cell, which will be described later, by being fixed with screws 6 serving as fixing means. A flat circuit board 9 is fixed to the rear surface with screws 8 as fixing means and constitutes a drive circuit for the light source 3 and a liquid crystal cell to be described later, and a flexible film-like wiring member 10 connects the circuit board 9. The main component is a thin, flexible, flat liquid crystal cell 11 that maintains electrical connection.

In the fixing member 2, the front end portions of both side wall portions 2c and 2d of the front opening of the peripheral wall portion 2b that integrally protrudes forward from the rear wall portion 2a extend from the upper end edge toward the lower end edge of the rear wall portion 2a. A stepped groove 2e is formed to be curved toward the side, and furthermore, a stepped groove 2e in which the diffusion plate 4 and the color filter 5 can be positioned and arranged is formed on the front end side, and integrally protrudes rearward from the rear wall portion 2a and is connected to the circuit. A mounting boss portion 2f for fixing the board 9 is formed.

The light source 3 includes a lamp disposed on the rear wall 2a of the fixing member 2, and is electrically connected to the circuit board 9 by a cord 3a.

When the cell holding member 7 is fixed to the fixing member 2, the diffuser plate 4 and the color filter 5 are arranged and held by bending their arms between the liquid crystal cell 11 and the stepped groove 2e of the peripheral wall portion 2b of the fixing member 2. .

The cell holding member 7 has a window portion 7a through which the display surface, which is the front surface of the liquid crystal cell 11, can be viewed from the front viewing position M, and when it is fixed to the fixing member 2, the liquid crystal cell 11 is held on the peripheral wall portion 2b of the fixing member 2. A curved shape that can come into contact with the front peripheral edge of the liquid crystal cell 11 so as to be disposed and held along the curved front end, in this case a curved shape similar to the curved front end of the peripheral wall 2b of the fixing member 2. A front wall portion 7b and a fixing member 2 integrally formed to protrude rearward from the periphery of the front wall portion 7b.
There is a peripheral wall portion 7C along the outer surface of the peripheral wall portion 2b.

The circuit board 9 includes an electronic component 9a constituting a drive circuit, an input connector 9b connected via a switch to an external battery (not shown) that serves as a power source for the electronic component 9a, and a wiring member 10 to a liquid crystal cell 11. An output terminal (not shown) for outputting a drive signal is provided, and is fixed to the mounting boss 2f with a screw 8.

The wiring member 10 is formed by printing, vapor depositing, etc. a conductive material on a resin film 10a to provide a conductive path 10b.
One end of 0b is fixed to an input terminal of the liquid crystal cell, which will be described later, and the other end is fixed to a relay terminal 12a provided on a rigid flat relay board 12. Further, the relay terminal 12a is positioned so that the relay board 12 is connected to the output terminal of the circuit board 9 via a conductive rubber 13, and is fixed to the circuit board 9 with screws 14.

The liquid crystal cell 11 includes a front substrate 11a made of a flexible light-transmitting insulating flat member such as a relatively thin transparent tempered glass plate, and a front substrate 11a made of a flexible light-transmitting insulating plate-shaped member such as a relatively thin-walled transparent tempered glass plate, and a front substrate 11a made of a flexible light-transmitting insulating plate-shaped member such as a transparent tempered glass plate having a relatively thin shape, and a display panel 11a having a front substrate 11a made of a flexible light-transmitting insulating plate-shaped member such as a transparent tempered glass plate having a relatively thin shape, and a display panel 11a that corresponds to a desired display shape such as letters, numbers, and scales. a first electrode 11b formed on the inner surface of the front substrate 11°a using a transparent conductive film, and a rear electrode made of the same material as the front substrate 11a and held at a constant distance between the front substrate 11a and a spacer llc. A second electrode 11 formed on the inner surface of the rear substrate 11d with a transparent conductive film or a reflective metal film so as to correspond to the substrate lid and the first electrode 11b.
e, a liquid crystal 11f sealed between the side substrates 11a and 11d, and an input terminal 11g drawn out from both electrodes 11b and lle and exposed to the outside on the front surface of the rear substrate lid. , if necessary, side substrate 1
Polarizing plates 11h and lli are disposed on the outer surfaces of 1a and lid.

That is, the liquid crystal display device 1 has a diffuser plate 4. After sequentially aligning the color filters 5, the liquid crystal cells 11 are placed one on top of the other, and in this state, the cell pressing member 7 is pressed against the fixing member 2 side, and the fixing member 2
By fixing the cell holding member 7 and the fixing member 6 with the fixing member 6, the liquid crystal cell 11 has its front peripheral edge attached to the rear surface of the front wall of the cell holding member 7, and its rear circumferential edge attached to the peripheral wall of the fixing member 2. between the fixing member 2 and the cell holding member 7, with the display surface of the liquid crystal cell 11 being curved rearward from the upper edge to the lower edge of the liquid crystal cell 11. Wiring member 10 disposed in and connected to liquid crystal cell 11
is pulled out to the side of the fixing member 2 through between the circumferential wall 2b of the fixing member 2 and the circumferential wall 7c of the cell pressing member 7,
Therefore, the liquid crystal display device 1 has the liquid crystal cell 11 in a curved state between the fixing member 2 and the cell holding member 7, and in this case, the liquid crystal cell 11 is bent downward with respect to the direction of the driver's line of sight.
Since the display surface of the liquid crystal cell is fixed with scissors in a state where it is curved backward from the upper edge to the lower edge of the liquid crystal cell, external light incident from the front of the display surface is reflected on the liquid crystal cell 11. Even if the light is reflected on the display surface, it can be reflected out of the field of view with respect to the viewing position, and reflections due to the influence of external light can be prevented and an anti-glare effect can be obtained.

Furthermore, by curving the liquid crystal cell 11, the depth dimension in front of the display screen can be reduced compared to conventional examples in which a front hood is provided, and furthermore, the anti-glare function can be maintained even without providing a front hood. The entire device can also be made thinner and smaller.

In addition, in this embodiment, by arranging the liquid crystal cell 11 in a bent state, the liquid crystal cell 11 can be elastically held at all times by using the elastic return force of the liquid crystal cell 11 itself.
An additional effect is that the liquid crystal cell 11 can be kept stable against external pressure such as external vibration.

Although one embodiment of the present invention has been described in detail above, various modifications can be made within the scope of the invention. For example, in the above embodiment, the liquid crystal cell 11 is curved by fixing the fixing member 2 and the cell holding member 7. However, as shown in FIG. 5, the front substrate 11a and the rear substrate lid of the liquid crystal cell 11 have the same curved shape as the front ends of the side walls 2c and 2d of the peripheral wall 2b of the fixing member 2, that is, The display surface of the liquid crystal cell 11 is curved toward the rear side of the liquid crystal cell 11 from the upper end edge to the lower end edge, and the curved liquid crystal cell is pressed between the cell holding member 7 and the fixing member 2. It may be placed in between.

Further, the light source 3 is not limited to a lamp, and may be a fluorescent lamp.

Further, the circuit board 9 can be housed and fixed inside the fixing member 2 instead of on the outside if there is room inside the fixing member 2.

Further, the substrate 11a and lid of the liquid crystal cell 11 are not limited to glass, and may be formed of a synthetic resin sheet.

Further, although the liquid crystal cell 11 is shown as being curved in the vertical direction, it may be curved in the left and right directions in addition to the vertical direction.

(Effects of the Invention) The present invention provides a liquid crystal cell having a front surface as a display surface, the display surface of which is curved toward the rear surface from the upper edge of the liquid crystal cell toward the lower edge, and a cell holding member and a fixing member are provided. By arranging it between the two, even if external light rays enter the display surface of the liquid crystal cell, it can be reflected out of the field of view relative to the viewing position, and it can also prevent reflections caused by the influence of external light, making it possible to prevent glare. It is possible to provide a liquid crystal display device that is effective and can be made thinner as a whole.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is a vertical sectional view, FIG. 3 is a sectional view of the main parts, FIG. 4 is a sectional view of the main parts of a liquid crystal cell, and FIG. 5 FIG. 3 is a vertical cross-sectional view showing another embodiment of the present invention. 2--Fixing member 7--Cell holding member 11--Liquid crystal cell

Claims (1)

[Claims] A liquid crystal cell having a front surface as a display surface, a cell holding member having a window portion through which the display surface of the liquid crystal cell can be viewed from a front viewing position and abutting the front peripheral edge of the liquid crystal cell, and a rear surface of the liquid crystal cell. a fixing member located on the side and fixing the cell holding member; the display surface of the liquid crystal cell is curved rearward from the upper edge of the liquid crystal cell toward the lower edge of the liquid crystal cell; A liquid crystal display device, characterized in that it is disposed between a cell holding member and the fixing member.