JPH0736067B2 - Liquid crystal display for various vehicle meters - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a liquid crystal display device having a back light source for various meters of a vehicle. Can be sensed instantly, and quantitatively sense the measured value quickly, easily,
It can be done reliably.

[Conventional technology]

Digital display and analog display by liquid crystal display devices have recently been adopted as display devices for various meters such as tachometers, speedometers, fuel indicators, and mileage meters of vehicles such as motorcycles and four-wheeled vehicles. Generally, the digital display and the analog display by the expanding and contracting bar graph display. On the other hand, since the confirmation of the display of various meters while the vehicle is driving is performed instantaneously while moving the line of sight up and down, the viewpoint can be instantly matched with the display position, and this can be quickly and easily performed. It is desirable that the display device can be viewed accurately. However, the conventional liquid crystal display device is not able to sufficiently meet these requirements, and in particular, various meters of motorcycles and the like, especially those exposed to external light such as sunlight. Therefore, it is desired that the display is bright as a liquid crystal display of various meters of a motorcycle and is not difficult to see due to external light.

As a liquid crystal display device for various meters of a vehicle to meet such a demand, a liquid crystal display device using a back light source, which has a fan-shaped display unit formed by integrating a large number of fan-shaped liquid crystal annular zones , There is a display area that expands and contracts in the radial direction according to changes in measured information values (Japanese Patent Laid-Open No. 55-155212). However, if this is adopted as it is as a display device for various meters of the vehicle, even if it is possible to intuitively sense the change in the measured value, it will be stored in the frame of the rectangular instrument, so the measured value will be quantified. It is not always easy to reliably and visually recognize it in an instant. Therefore, in order to adopt this known liquid crystal display device as a display device for various meters of a vehicle, it is necessary to devise a device that can sufficiently meet the above requirements.

Further, since the display part of various meters of the vehicle is an important part of the vehicle design, it is necessary to devise the structure such that the appearance of the electrodes and the like are suitable for the display device of the vehicle. is necessary.

[Problems to be Solved by the Invention]

It is an object of the present invention to meet the above-mentioned requirements for adapting the above-mentioned liquid crystal display device whose display area expands and contracts in the radial direction according to the change of the measurement information value to various meters of the vehicle, and to drive the vehicle. In the operation of checking the indicated values of various meters, that is, in the operation of checking the indicated values while moving the line of sight up and down, it is instantly moved to the display tip of the viewpoint meter, and the displayed values are sensuous Is to devise the structure of the liquid crystal display device so that it can be instantly and reliably visually recognized and its appearance is suitable for the display device of the vehicle.

[Means taken to solve the problem]

Means taken for solving the above problem is that a liquid crystal display unit having a back light source is provided in a substantially rectangular frame, and the display unit is configured by integrating a large number of liquid crystal zones, and the display range of the display unit is widened. The area is enlarged according to the change of the measurement information value,
It is composed of the following elements (a) to (d) on the premise of various meters of the vehicle to be reduced.

(A) The above liquid crystal zone is an annular zone (liquid crystal annular zone)
The display range is expanded and contracted in the radial direction. (B) The liquid crystal cell is a twisted nematic type, and the scale corresponding to the scale of the display unit and the unit corresponding to the scale unit are not subjected to the alignment treatment. Notch 57 from the outer circumference to the center of the display
s, 58b are formed, and the cutout portion is used as a connection line lead-out portion of the display electrode plate of the liquid crystal annular zone, (c) the cutout portion is raised obliquely upward from the center of the display portion, and the above-mentioned cutout portion is formed in the cutout portion. A scale portion is provided, and (d) the width of the electrode plate of the liquid crystal annular zone is set to be substantially maximum at the cutout portion and is substantially minimum on the opposite side, and the display surface of the liquid crystal annular zone is formed into a substantially eccentric ring shape.

[Action]

When the power source of the vehicle instrument is turned on, the rear light source of the liquid crystal display unit is turned on. Then, since the alignment process is not performed on the portion corresponding to the scale portion such as the scale and the unit of the display portion, the scale portion is displayed and the display range is clearly indicated.

A liquid crystal display unit formed by integrating a large number of annular zones is provided in a substantially rectangular frame, the cutout portion is raised obliquely upward from the center of the display unit, and the scale portion is provided in the cutout portion to form a liquid crystal ring. The width of the zone electrode plate is approximately maximum in the cutout portion, and the width is approximately minimum on the opposite side, and the display surface of the liquid crystal annular zone is formed into a substantially eccentric ring shape, thereby changing the display area according to the change of the measurement information value. Expands and contracts from the center of the display in the radial direction, and the display becomes a collection of eccentric rings that rise to the right or rise to the left,
The change of the display area due to the change of the measurement information value is rising to the right,
Or it will rise to the left. The change in the display area in the vicinity of the scale portion is larger than the change in other portions. Therefore, the change amount of the display range of the ring-shaped liquid crystal display device provided in the frame of the relatively small substantially rectangular measuring instrument is made as large as possible to make it easy to visually recognize the change amount. It is possible to intuitively see the magnitude of the displayed value. Then, the measurement information value is confirmed on the quantitative calendar by recognizing the position of the outer end of the display range in the radial direction and the display of the scale portion, but the display range is right shoulder in the direction of the arrangement of the display of the scale portion. It is an assembly of eccentric rings that rises or rises to the left, and the display range expands and contracts along the scale as a whole, so the tip of the display, that is, the position of the outer edge of the part where the change in the display range is the largest. It is possible to easily and accurately visually recognize the numerical value of the scale indicated by. This confirmation action is performed during a momentary operation process during driving, in which the line of sight directed to the front is moved downward for a moment and then moved forward again.
However, in the liquid crystal display device of the present invention, the shape of the display is directed obliquely upward, the tip of the display moves diagonally upward, and the change in the display value at the tip is changed to another part. Since it is relatively large, its tip can be visually recognized quickly and easily. Therefore, in the moment of confirming the displayed value, the viewpoint is instantly moved to the display tip of the meter, and the sensuous size of the displayed value and the quantitative display value can be visually recognized easily and reliably. can do.

Further, when the liquid crystal display unit in which the ring-shaped liquid crystal annular zones are integrated is arranged in the rectangular frame, a space is inevitably formed at the corner of the frame. Therefore, the connecting wires of the electrode plates are collected and housed in this empty portion. Then, the notch is provided in a direction that rises obliquely upward in the display portion by the assembly of the liquid crystal annular zone, and the notch portion is used as the connection line drawing portion of the display electrode plate of the liquid crystal annular zone, thereby The gathering place and the terminal of the electrode plate can be brought as close as possible, so that the connecting line can be shortened as much as possible and the wiring can be facilitated. Therefore, the appearance of the display device is good, and the arrangement of the connection lines and the routing of the wiring are not impaired by the terminals of the electrode plate and the like.

〔Example〕

Next, an embodiment will be described with reference to the screen. This embodiment is an example in which the present invention is applied to various meters of a scooter type motorcycle.

The vehicle body designated by the front wheels 1 and the rear wheels 2 is covered by a cover 4, and the rear wheels 2 are driven by a power unit 3 including an engine, a transmission, and the like.

The front side of the handle 6 is covered with a cowling 7, and a screen 8 is provided above the cowling 7. Each instrument is provided on the cowling 7, and a rectangular frame of the instrument is inclined obliquely upward so that the rider can easily see the instrument. Various meters of the liquid crystal display device 9 are arranged in a rectangular frame of the instrument, and the entire surface of the liquid crystal display device 9 is covered by a visor 10.
Covered by. The visor 10 extends upward along the screen 8 between the screen 8 and the liquid crystal display device 9, and adjusts the sun rays that have passed through the screen 8 thereby to weaken the reflected light on the surface of the liquid crystal display device 9. There is.

The structure of the liquid crystal display device 9 is as shown in FIGS. 3 to 16, and the display unit 11 and the keyboard unit 12 are integrally provided,
A control circuit 13 is provided inside. The display unit 11 has a rear light source, that is, a transmissive liquid crystal device,
A traveling speed display unit (speed meter) 14, a so-called fuel remaining amount display unit (fuel gauge) 15 that displays the remaining amount of fuel, a switchable trip meter, and a time display unit 16 are provided.

An illuminated key switch is provided on the keyboard section 12 in the lower center, and this key switch includes an on / off key 17, a mode key 18, an input key 19, a set key 20 and a reset key 21.
It consists of Various indicator lamps 22 are installed on the right side of the keyboard unit 12, and an electric distance meter 23 is installed on the left side.

The liquid crystal cell 24 constituting the display unit 11 is held by the holder 25,
As shown in FIG. 7, the holder 25 has a screw 28 with an upper mounting portion 25a interposed at a joint between the upper case 26 and the lower case 27.
As shown in FIG. 6, the side mounting portion 25b is attached to the upper case 26.
It is fixed with screws 29 respectively.

On the front side of the liquid crystal cell 24, a surface glass 30 which is a plate-shaped member is supported by an upper case 26 via a holder 31. The surface glass 30 having a low transmittance is used and is arranged in front of the graduations such as the graduation 32 and the unit 33 in the display 11, and when the fluorescent lamp 34 which is the back light source is not turned on, the entire display is dim. ing.

A diffusing plate 35 is arranged on the back side of the liquid crystal cell 24 while being held by a holder 25, and the diffusing plate 35 diffuses the light of the fluorescent lamp 34 and makes it evenly enter the liquid crystal cell 24.

As the fluorescent lamps 34, for example, three three-wavelength type lamps having high-efficiency and high-luminance output of 6 W are arranged in parallel in the lateral longitudinal direction, and screwed to the lower case 27 via the silicone rubber socket 36. Both sides of the filament 37 are supported by the electrodes 38, and are approximately 67 Hz.
There is a natural frequency in the vicinity.

For this reason, the silicone rubber socket 36 has a damper effect, and the orientation of the filament 37 is arranged vertically with respect to the road surface which is less likely to be affected by the acceleration that the vehicle receives while traveling, thereby providing vibration resistance. Further, power is supplied to the electrodes 38 by directly soldering the electrode pins without using a base, thereby preventing non-lighting and flicker due to poor contact with vibration.

The inner surface of the lower case 27 is made of a white material or coated to enhance the light reflectance. The diffusion plate 35 is made of a semi-transmissive white acrylic plate and has an effect of blocking heat generated by the fluorescent lamp 34. With respect to light emission at low temperatures, the lower case 27 and the acrylic plate of the diffusion plate 35 form an illumination chamber, so that the temperature of the fluorescent lamp 34 rises and the light emission luminance rises with time to ensure a predetermined value. It

The display electrode of the liquid crystal cell 24 is connected to the lower case via the lead wire 39.
It is connected to a printed circuit board 40 arranged on the back side of 27, and this printed circuit board 40 is provided with a control circuit 13 described later.

The front side of the lower case 27 extends from the upper case 26, and
A panel 41 of the keyboard unit 12 is provided at 27a. As shown in FIG. 4, the button portion 42 of each key switch of the keyboard portion 12 is slidably supported by the case portion 41a, and the rubber switch portion 43 is connected to the circuit of the printed circuit board 44 by the pushing operation of the button portion 42. It is designed to drive parts.

From the lower fluorescent lamp 34 through the acrylic light guide 45,
Light is guided to each button portion 42 to illuminate it. In this way, since the lower case 27 forms an integrated lighting room including the keyboard portion 12, it is not necessary to provide a key dedicated lamp.

The liquid crystal cell 24 is of a twisted nematic type,
It is configured as shown in the figure.

An upper glass plate 47 and a lower glass plate 48 are arranged on both sides of the liquid crystal 45, an upper polarizing plate 49 is arranged on the upper surface of the upper glass plate 47, and a lower polarizing plate 50 is arranged on the lower surface of the lower glass plate 48. Alignment film 51,
52 is a liquid crystal 46, a segment electrode plate 53, and a common electrode plate 54.
The alignment film 51 is provided between the first and the second polarization plates, and the alignment film 51 is orthogonal to the polarization direction of the upper polarization plate 49, and the alignment film 52 is aligned so as to be parallel to the lower polarization plate 50.

This orientation process is not performed on the scale 32 of the display unit 11 and the portions A and B corresponding to the scale unit such as the unit 33.

Therefore, in the twisted nematic liquid crystal cell 46, the liquid crystal molecules block the 90 ° twisted light when the drive voltage is not applied, and when the drive voltage is applied, the liquid crystal molecules face the electric field direction and transmit the light. As shown in, when the back light source is turned on without applying the drive voltage, the liquid crystal effect cannot be obtained in the portions A and B where the alignment process is not performed, and the light is transmitted.

Therefore, in the liquid crystal display device 9, when the fluorescent lamp 34 does not light up and the drive voltage is not applied to the segment electrode plate 53 and the common electrode plate 54, the entire display portion 11 as well as the background portion does not transmit light, and thus becomes dark. Therefore, the segment electrode plate 53 is prevented from being visible from the outside as much as possible.

Then, the fluorescent lamp 34 is turned on, but the segment electrode plate 53
When a drive voltage is not applied to the common electrode plate 54, a scale 32 and a scale 33 such as a unit 33 are displayed.The scale includes the entire range of the speed display 14 and the fuel level display 15 and the like. A reference can be given to the direction in which the part changes.

Furthermore, when a drive voltage is applied to the segment electrode plate 53 and the common electrode plate 54, the speed display unit 14 displays
Increase or decrease along scale 32. On the other hand, the fuel remaining amount display portion 15 decreases along the scale 32 as the fuel is consumed.

The display unit 11 is configured as shown in FIGS. 11 to 15.

Fig. 11 shows the segment electrode plate 53, and Fig. 12 shows the common electrode plate.
54 is shown.

As shown in FIG. 11, the segment electrode plate 53 includes annular zone display portions 55 and 56, which are provided with inner zone portions (accumulation of a large number of annular zones, the same applies hereinafter) 55a and 56a and outer zone portions (a large number of annular zones). The same applies hereinafter) 55
b and 56b are divided into two parts, and connecting lines 59 and 60 arranged in notches 57a and 58a formed by notching them both to the center are connected so that the electric capacities become uniform in order.
55b and 56b are connected to a terminal 63 via connecting lines 61 and 62.

The central warning display portions 64 and 65, and the trip meter / time display portion 66 are also connected to the terminal 63 via connection lines 67, 68 and 69.

As shown in FIG. 12, the common electrode plate 54 includes annular zone display portions 55 and 56, respectively, inside zone portions 55c and 56c and outside zone portions.
55d and 56d are divided into two parts and these are cut out 57
It is connected to the terminal 63 via connection lines 70, 71, 72, 73 arranged at b, 58b.

The widths of the segment electrode plate 53 and the common electrode plate 54 are substantially maximum at the cutout portions and substantially minimum at the opposite portions, so that the display surface of the liquid crystal annular zone has a substantially eccentric ring shape.

A drive waveform of 1/2 duty and 1/2 bias is applied to the segment electrode plate 53 and the common electrode plate 54, and they are sequentially time-divisionally driven from the inner side or the outer side at a certain time. Therefore, the annular zone display unit 55 sequentially lights radially from the inside to the outside to increase or decrease the area of the display unit, while the annular zone display unit 56 is wholly lit, and sequentially from the outside to the inside. It is turned off radially to increase or decrease the display area.

At this time, the inner zone 55a and the outer zone portion 55b of the segment electrode plate 53 forming the annular zone display portion 55 are sequentially connected so that the capacitance becomes uniform, and the segment electrode plates are sequentially driven in time division. Therefore, the driving load of each zone is made uniform.

The cutout portion 57a of the segment electrode plate 53 serves as a lead-out portion for the connection lines 59, 61, 67, and the cutout portion 58a serves as a lead-out portion for the connection lines 60, 62, 68. Also, in the common electrode plate 54, the cutout portion 57b serves as a lead-out portion for the connecting wire 70, and the notch portion 58b serves as a lead-out portion for the connecting wire 71. Therefore, even if the segment electrode plate 53 and the common electrode plate 54 are displayed in an annular zone, and even if they are divided into two parts and are connected to the inner part and the outer part, the respective connection lines complicatedly interfere with the annular zone display part and the connection lines. Can be arranged neatly without doing.

Notch 57 of segment electrode plate 53 and common electrode plate 54
a, 58a, 57b, 58b are formed so as to spread outward in a wedge shape, and connecting lines from the concentric annular zone display parts 55, 56
59, 60, 61, 62, 70, 72 routing spaces are secured.

Further, the notch 57a and the notch 58a of the segment electrode plate 53 and the notch 57b and the notch 58b of the common electrode plate 54 are arranged in the same direction. For this reason,
Annular zone display parts 55 and 56 of segment electrode plate 53 and terminal 63
Connection wires 61, 62, 67, 68 for connecting with and also the common electrode plate
The routing of the connecting lines 70, 71, 72 connecting the annular zone display parts 55, 56 of 54 and the terminal 63 can be concentrated at one place, for example, the upper right side. Therefore, it becomes possible to dispose the annular zone display parts 55 and 56 in the central part, and it is easy to secure a space for disposing the display parts.

Further, the notch portions 57a, 58a, 57 of the annular zone display portions 55, 56.
Since b and 58b and the terminal 63 are close to each other, the length of each connection line is shortened and wiring is facilitated.

As shown in FIG. 13, the display unit 11 turns on the fluorescent lamp 34 in the collation mode in which the drive signal is not input to the traveling speed display unit 14 and the remaining fuel amount display unit 15, and the scale and the numbers 0 to 60, etc. A scale 32 and a unit 33 such as "km / h" are displayed.

When the drive voltage is applied in the ON mode, as shown in FIGS. 14 and 15, the annular zone display section up to 30 km / h is yellow, the central warning display section 14a and the annular zone display section of 30 to 60 km / h are The red color is brighter than the surrounding black background, and the contrast at the time of on / off is sufficiently secured.

In this example, the resolution of zone 14b is every 2.5 km / h,
The zone interval a for every 10 km / h is 1.0 mm, the zone interval b for every 5 km / h is 0.5 mm, and the zone interval c for the other parts is 0.3 mm, and the zone intervals are changed by integer multiples.

In the traveling speed display unit 14, the drive voltage applied to the segment electrode plate 53 and the common electrode plate 54 is increased based on the speed signal, so that the annular zone display unit 55 of the liquid crystal is radially expanded. At this time, since the zone interval of the zones 14b of the annular zone display section 14 changes by an integer multiple, this section becomes a scale and the rider can easily know the speed change.

Then, when the display area expands and exceeds 30 km / h, the warning light of the warning display part 14a in the center of the zone blinks in red, it works as a speed warning, the speed further increases, and the upper limit of the annular zone display part is 60 km / h. Even if a speed signal that exceeds the
60km / h is still displayed.

The remaining fuel amount display section 15 has four-level zone display,
The larger the remaining fuel amount is, the larger the zone is, and the remaining amount decreases as the fuel is consumed, the zone display becomes smaller toward the center, and the area of the display unit decreases. Zone spacing is 1/2
Unlike other parts, the part of is formed wide and it is a scale. Then, when the remaining amount of the zone display is smaller than the predetermined value, the level display disappears and the warning display portion 15a blinks. Therefore, the rider can recognize that the remaining amount of fuel is at the warning value together with the display of the remaining amount. In this way, by providing the warning display portions 14a, 15a of the traveling speed and the remaining fuel amount in the center of the zone display portion, the rider does not have to shift the line of sight while traveling and monitor the blinking of the warning display portion. It can be surely recognized, and the checking operation is easy because the line of sight is not shifted.

The trip meter / time display unit 16 normally displays the time when the system is turned on, and when the mode key 8 of the keyboard unit 12 is pressed, it becomes a trip meter and switches each time it is pressed.

The display of the trip meter is 0.1 unit, 0.0 to 999.9
Display up to 4 digits. The change cycle of the display is every 0.1km,
The integrated value of the distance pulse from the reed switch (not shown)
When 0.1km is reached, the display data is changed to change the liquid crystal display.

The electric total distance meter 23 sends a signal to the pulse motor to obtain the driving force. The minimum unit of the character wheel (not shown) is 0.1 km, but when the motor shaft is decelerated via the gear, the motor drive signal becomes smaller. You can send in units.

The control circuit 13 is constructed as shown in FIG.

The power supply for the control circuit 13 is from the vehicle battery 74 to the regulator 75.
It is converted into a predetermined power supply voltage through the power supply stabilization circuit. The power supply Vcc1 obtained by the regulator 75 is a power supply which is always supplied and is supplied to the clock IC 76 and the 8-bit microcomputer 77.

On the other hand, the power supply Vcc2 obtained by the regulator 79 connected to the battery 74 via the switch 78 is a power supply necessary for operating the system, and includes the input interface 80 and the AD converter.
81, output interface 82, 83, fail-safe circuit
84, the liquid crystal drive IC 85, etc. are supplied to a portion requiring a power supply other than the power supply Vcc1.

In the control circuit 13, the contact 86a of the mechanical key 86 is closed, or the coil 78a of the switch 78 is excited by the input of the personal identification number from the keyboard 12 of the liquid crystal display device 9, whereby the contact 7
Close 8b and the system is ready for operation.

The speed signal of the speed sensor 87, the level signal of the fuel sensor 88, the operation signal of the flasher operation unit 89, the angle signal of the steering wheel angle sensor 90, and the detection signal of the anti-theft sensor 91 are:
It is incorporated into the 8-bit microcomputer 77 via the input interface 80. Then, the 8-bit microcomputer 77 performs arithmetic processing, and the output interface
Output signals are output to the outside via 82 and 83, and are respectively mounted on the vehicle, for example, ignition circuit relay 92, main switch relay 93, helmet holder 94, flasher relay 95, horn relay 96, fluorescent lamp of liquid crystal display device 9. It drives the lighting relay 97, the electronic buzzer 98, the electric total distance meter 23, and the like. The electronic buzzer 98 sounds when the key switch of the liquid crystal display device 9 is operated.

In addition, in the above-described embodiment, the invention is applied to the traveling speed display unit 14 and the remaining fuel amount display unit 15, but the same can be applied to a tachometer or the like that displays the rotation speed of the internal combustion engine. Further, although the annular zone display portions 55 and 56 are formed in a circular shape in the above embodiment, they may be triangular, quadrangular or polygonal. Reference numeral 5 is a step.

〔The invention's effect〕

According to the present invention, a liquid crystal display unit having a back light source is provided in a substantially rectangular frame, and the display unit is configured by integrating a large number of liquid crystal zones. Applying a liquid crystal display device that expands or contracts according to changes to the display device of various meters of the vehicle,
Although the above problems have been solved in order to improve the usability thereof, an invention that has solved this problem is not yet known. Therefore, it is an effect peculiar to the present invention in itself that the problem is solved by solving the problem and adopting the liquid crystal display device as a display device of various meters of a vehicle, and the details thereof are described in the section of the operation. It is as follows.

Then, regarding the one in which the area of the liquid crystal display part of each meter of the vehicle is expanded or contracted according to the change of the measurement information value, the liquid crystal zone is made into a large number of annular zones (liquid crystal annular zones), and diagonally upward A scale is provided, the display area is enlarged or reduced in the radial direction from the center of the display, and the change in the display range in the vicinity of the scale is made larger than that of other parts, resulting in a relatively small rectangular shape. The change of the display range of the liquid crystal ring-shaped display device provided in the meter-shaped instrument frame can be increased, and thus the change of the display value can be intuitively and easily visually recognized. In addition, the scale part is placed diagonally above, and the tip of the part with the largest change in display area moves along the scale part, so it is easy to check the coincidence point between the scale and the tip of the display part. It is possible to easily and surely visually check the measured value in a moment when the eye gaze moves in the vertical direction.

Further, since the annular zone display electrode plate is provided in the rectangular frame, a space is formed diagonally above the annular zone display electrode plate. Then, since the notch is provided in the annular zone display electrode plate obliquely upward toward the direction of this space, by concentrating the connection lines in the above-mentioned space, it is easy to accommodate the connection lines and route the connection lines, Since the connection line was connected to the terminal of the annular zone display electrode plate in the cutout, the space of the instrument panel, which has a limited space, can be used very effectively, and various meters of the vehicle could be organized in a good appearance. Is.

[Brief description of drawings]

FIG. 1 is a side view of a motorcycle to which the invention is applied, and FIG.
FIG. 4 is a plan view, FIG. 3 is a front view of a liquid crystal display device in a meter device, FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is a light guide for a lower case of the liquid crystal display device and a keyboard portion. Rear view with the printed circuit board removed, and Fig. 6 is VI-VI in Fig. 5.
FIG. 7 is a sectional view, FIG. 7 is a sectional view taken along line VII-VII of FIG. 3, FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 3, FIG. 9 is a diagram showing a structure of liquid crystal of a liquid crystal display device, and FIG. Fig. 11 shows its operating state
FIGS. 12 and 13 show a liquid crystal display electrode plate of a liquid crystal display device, FIGS. 13 to 15 show an operating state of the liquid crystal display device, and FIG. 13 shows a state in which a fluorescent lamp is turned on. , 14th
FIG. 15 shows a state in which the liquid crystal is driven, FIG. 15 is an enlarged view of a main part of FIG. 14, and FIG. 16 is a control circuit diagram of the liquid crystal display device. 9 …… Liquid crystal display device 11 …… Display unit 12 …… Keyboard unit 13 …… Control circuit 14 …… Running speed display unit 15 …… Remaining fuel amount display unit 32 …… Scale 33 …… Units 34 …… Fluorescent lamp 51, 52 …… Light distribution film 53 …… Segment electrode plate 54 …… Common electrode plate

Claims (1)

[Claims] 1. A liquid crystal display unit having a back light source is provided in a substantially rectangular frame, and the display unit is constructed by integrating a large number of liquid crystal zones. In various vehicle meters that expand and contract in the radial direction according to changes, the liquid crystal zone is an annular zone (liquid crystal annular zone),
The display range is expanded and contracted in the radial direction, the liquid crystal cell is a twisted nematic type, and the part corresponding to the scale part of the display part, such as the scale part, is not subjected to the alignment process, from the outer periphery to the center of the display part. A notch is formed by notching, and this notch is used as a connecting line drawing portion of the display electrode plate of the liquid crystal annular zone, the notch is raised obliquely upward from the center of the display, and the scale is provided in the notch. A liquid crystal display device for various meters of a vehicle, wherein the width of the electrode plate of the liquid crystal annular zone is set to be approximately maximum at the cutout portion and is substantially minimum on the opposite side, and the display surface of the liquid crystal annular zone is formed into a substantially eccentric ring shape.