JP2003076294A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device of favorable quality by suppressing cost increase. SOLUTION: This invention relates to the display device wherein a speedometer 7 (a 1st indicator) provided with liquid crystal display elements 8 held by a housing 9, and a tachometer 1 (a 2nd indicator) provided with a signboard 4 and a light transmission body 3 are arranged side by side, a edge part of the light transmission body 3 is superposed on that of the liquid crystal display elements 8, and also a covering part 26 for deciding display areas X1, X2 of the speedometer 7 and the tachometer 1 is located in front of the periphery of the speedometer 7 and the tachometer 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device in which, for example, a liquid crystal display and an analog display are juxtaposed, and particularly, a display device in which an edge of the liquid crystal display is overlapped with an edge of the analog display. It is about.

[0002]

2. Description of the Related Art As shown in FIG. 4, there is a display device in which a liquid crystal display and an analog display are arranged in parallel. The tachometer 1 as an analog display includes a display main body 2, a light guide 3 arranged on the front side of the display main body 2, a display plate 4 arranged on the front side of the light guide 3. The pointer 5 is fixed to the display body 2 and operates according to the rotation of the engine of the vehicle. The pointer 5 is mounted on the hard circuit board 6 in an electrically connected state.

The speedometer 7 as a liquid crystal display is
The liquid crystal display element 8 has a substantially quadrilateral shape and a housing 9 that holds the liquid crystal display element 8. A plurality of electrode leads 10 electrically connected to the circuit board 6 are provided on one side of the liquid crystal display element 8. It's stuck. The lower ends of the electrode leads 10 (on the side of the circuit board 6) are inserted into lead insertion holes (not shown) provided on the circuit board 6 and soldered to lands provided on the back surface side of the circuit board 6. The housing 9 holds the liquid crystal display element 8 and also has a function of illuminating the liquid crystal display element 8 from behind by taking in light from a light source described later from the light receiving section 11, and is made of a colorless and transparent synthetic resin.

FIG. 5 shows a state in which the liquid crystal display element 8 is held by the housing 9. The liquid crystal display element 8 is provided in the housing 9.
Has a flat surface portion 12 having substantially the same shape as the outer shape, a wall portion 13 provided around the flat surface portion 12, and an elastically deformable locking piece 15 having a locking claw 14. The locking pieces 15 are provided so that the locking claws 14 are locked to the front surface sides of both ends (where the electrode leads 10 are not fixed here) of the liquid crystal display element 8 to which the electrode leads 10 are fixed. is there. The wall portion 13 is partially provided on the periphery except the side where the electrode lead 10 is fixed, and the liquid crystal display element 8 is provided between the locking piece 15 and the wall portion 13.
Is fixed in the circumferential direction. Further, as shown in FIG. 5, the wall 13 on the side opposite to the side to which the electrode lead 10 is fixed is partially provided with an inclined wall 16 whose tip side is inclined toward the locking piece 15 side.

The liquid crystal display element 8 is assembled in the housing 9 as follows. When the lower end of the electrode lead 10 fixed to the liquid crystal display element 8 is inserted into the lead guide groove 17 of the housing 9, the back surface of the liquid crystal display element 8 on the side where the electrode lead 10 is fixed becomes the inclined surface 18 of the locking claw 14. Abut. At this time, the liquid crystal display element 8 is pushed to the opposite side,
The opposite end contacts the inclined wall 16 (see FIG. 6). By further pushing the liquid crystal display element 8 downward from this state, the liquid crystal display element 8 moves downward while the locking piece 15 bends outward (left side in FIG. 6). Then, when the locking claw 14 comes off the liquid crystal display element 8, the locking piece 15 returns to its original position, the locking claw 14 locks on the surface of the liquid crystal display element 8, and the liquid crystal display element 8 moves to the housing 9. It is held on the flat portion 12.

At this time, when the liquid crystal display element 8 is biased toward the inclined wall 16 by the locking piece 15, the liquid crystal display element 8 can be pulled out upward from the housing 9 by the locking claw 14 and the inclined wall 16. I try not to. Further, when the liquid crystal display element 8 is held in the housing 9, one of the elastically deformable locking pieces 15 is used and the other of the rigid inclined walls 16 is used. The element 8 can be positioned (position is determined), and the assembling workability is also good (if both are locking pieces 15 having locking claws 14, the locking pieces 15 are elastic pieces). It is difficult to determine the position of the liquid crystal display element 8).

On the circuit board 6, electronic components for driving the tachometer 1 and the speedometer 7, a display board 4, a pointer 5, and the like.
A light emitting diode 19 as a light source for illuminating the liquid crystal display element 8 is mounted. After the tachometer 1 and the speedometer 7 are mounted on the circuit board 6, they are housed in the lower case 20 made of synthetic resin having an opening on the front surface to form the display plate 4 and the speedometer 7 constituting the tachometer 1. A black dial plate 21 is arranged in front of the periphery of the liquid crystal display element 8. The dial plate 21 covers the inside of the lower case 20 that can be seen from the gap between the display plate 4 or the liquid crystal display element 8 and the lower case 20, and has a function of defining the display areas X1 and X2 of the speedometer 7 and the tachometer 1. I also have. Reference numeral 22 is a colorless and transparent see-through plate that covers the front opening side of the lower case 20, that is, the tachometer 1 and the speedometer 7.

[0008]

However, in the above-mentioned conventional example, since the lower end of the electrode lead 10 is soldered to the circuit board 6 at the eight positions of the liquid crystal display element on the side to which the electrode lead 10 is fixed, Although it does not move in the vertical direction, the opposite side is in a state where the corner portion on the front surface side of the liquid crystal display element 8 is in line contact with the inclined wall 16 as shown in FIG.
As described above, the liquid crystal display element 8 is biased toward the inclined wall 16 side by the locking piece 15, and the inclined wall 16 with which the corners on the front surface side of the liquid crystal display element 8 are in contact is inclined inward. Therefore, the liquid crystal display element 8 has a structure that does not easily come out upward. However, particularly in a vehicle such as a motorcycle, the vibration applied to the display device is large, and the locking piece 15 swings to the left side in FIG. There is a possibility that the edge of the liquid crystal display element 8 may be shaken, noise may be generated between the liquid crystal display element 8 and the slanted wall 16, and the dust may be wiped off.

In order to solve the above problems, FIG.
As shown by the broken line in FIG. 3, a holding frame 23 having a substantially L-shaped cross section is arranged from the peripheral edge of the liquid crystal display element 8 to the periphery of the housing 9 to prevent the liquid crystal display element 8 from shaking even if vibration is applied. However, the number of parts will increase, and the number of assembly steps will also increase, resulting in higher costs.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a display device of good quality while suppressing an increase in cost.

[0011]

In order to achieve the above object, the present invention provides a first display device having a display element held in a housing, and a second display plate or a display plate and a light guide. Is a display device in which the display device or the light guide body is overlapped with the edge portion of the display element.

A display device in which a first display device having a display element held in a housing and a second display device having a display plate or a display plate and a light guide are arranged side by side. And overlapping the edge of the display plate or the light guide with the edge of the display element, and
The cover portion for defining the display area of the display is arranged in front of the first and second displays.

Further, an elastic member is arranged at the overlapping portion.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described with reference to a display device used in a vehicle as an embodiment. The same or corresponding portions as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted. Further, the speed indicator 7 will be used as the first indicator and the tachometer 1 will be used as the second indicator. FIG. 1 is a sectional view of the display device, but the edge of the tachometer 1 is overlapped with the edge of the speedometer 7. FIG. 2 shows a cross section of the speedometer 7, but shows a cross section in a direction orthogonal to the cross section shown in FIG. That is, the speedometer 7 of the display device according to the present embodiment is the circuit board 6 when the speedometer 7 according to the conventional example is rotated by 90 degrees.
It is arranged above.

The tachometer 2 is an analog type, and is composed of a display main body 2, a light guide 3, a display plate 4, and a pointer 5 as in the conventional example. The light guide 3 is made of a light-transmissive synthetic resin and has rigidity, and receives the light from the light emitting diode 19 as a light source to illuminate the display plate 4 and the pointer 5. Although not shown in detail, the display plate 4 is provided with a white transparent display part such as a scale or a number indicating the number of revolutions of the engine, which is an indication target of the pointer 5, on the surface of a colorless and transparent substrate, and the other parts are black. The light emitting diode 19 is lit to display the display portion in white in a transmissive display.

The speedometer 7 is of a liquid crystal display type and comprises a liquid crystal display element 8 for displaying the traveling speed and traveling distance (display portion) of the vehicle, and a housing 9 for holding the liquid crystal display element 8. There is. Similarly to the conventional example, the housing 9 also has a function as a light guide member that takes in light from the light emitting diode 19 as a light source from the light receiving portion 11 and illuminates the liquid crystal display element 8 from behind, and is made of a colorless transparent synthetic resin. Become. Then, as shown in FIG. 2, the lower ends of the electrode leads 10 fixed to the liquid crystal display element 8 are soldered to lands provided on the back surface side of the circuit board 6.

The housing 9 has a wall portion 13 provided around the flat surface portion 12 and an elastically deformable locking piece 15 having a locking claw 14. The locking pieces 15 are provided at both ends of the liquid crystal display element 8 on the side to which the electrode lead 10 is fixed. The wall portion 13 is partially provided on the periphery except the side where the electrode lead 10 is fixed, so that the liquid crystal display element 8 does not move in the circumferential direction between the locking piece 15 and the wall portion 13. . Further, as shown in FIG. 3, an inclined wall 16 whose tip side is inclined toward the locking piece 15 side is partially provided on the wall portion 13 on the side opposite to the side to which the electrode lead 10 is fixed.

The assembling of the liquid crystal display element 8 to the housing 9 is the same as that of the conventional example, and is omitted here. Further, a glossy white reflector 24 is fixed to the back surface of the housing 9. The reflecting plate 24 reflects the light leaked from the back surface side after entering the flat surface portion 12 of the housing 9 to the liquid crystal display element 8 side, and illuminates the entire liquid crystal display element 8 brighter and more uniformly.

The upper case 25 in this embodiment is a transparent and transparent transparent plate 22A for the tachometer 1 and a transparent plate 22B for the speedometer 7, and the transparent plate 22.
The cover portion 26 is integrally formed around A and 22B. The cover portion 26 is made of black synthetic resin and is arranged in front of the periphery of the tachometer 1 and the speedometer 7 to cover the inside of the lower case 20 from being seen. It also has a function of defining the display areas X1 and X2. The upper case 25 has a side wall 27 extending from the cover 26. The side wall 27 covers the periphery of the lower case 20 on the front opening side.

A vertical wall 28 is integrally provided from the cover portion 26 toward the display plate 4 and the liquid crystal display element 8. If the distance between the cover plate 26 and the display plate 4 and the liquid crystal display element 8 is wide, the inside of the lower case 20 can be more easily seen. It is not necessary to provide it if there is no problem in visually recognizing.

A method of assembling the display device will be described. First, with the liquid crystal display element 8 held in the housing 9, the lower ends of the electrode leads 10 are soldered to the lands provided on the back surface side of the circuit board 6. Next, the tachometer 1 is mounted on the circuit board 6. Then, the edge portion of the light guide 3 on the speedometer 7 side is overlapped with the edge portion on the front surface side of the liquid crystal display element 8. Further, a sponge 29 as an elastic member is arranged at this overlapping position, and the light guide 3 having elasticity and the liquid crystal display element 8 are slightly compressed. The sponge 29 may be attached to the back surface of the light guide 3 or the liquid crystal display element 8 at the time of assembling or by using, for example, a double-sided adhesive seal. Further, the elastic member is not limited to the sponge 29, and any member having elasticity such as synthetic rubber can be appropriately selected.

After that, the tachometer 1 and the speedometer 7 mounted on the circuit board 6 are housed in the lower case 20,
An upper case 25 that covers the front sides of the tachometer 1 and the speedometer 7 is attached.

As described above, by superimposing the edge portion of the light guide 3 of the tachometer 1 on the edge portion of the liquid crystal display element 8 of the speedometer 7, even if a large vibration is applied to the display device, the liquid crystal display element 8 Can be suppressed, and the generation of noise and dust can be suppressed without using a separate member.
Further, since the sponge 29 is arranged between the liquid crystal display element 8 and the light guide body 3 which are overlapping portions, the edge side of the liquid crystal display element 8 is urged downward by the elastic sponge 29. . Therefore, it is possible to prevent the liquid crystal display element 8 from being lifted upward, and to further suppress the generation of abnormal noise and dust.

By overlapping the tachometer 1 on the edge of the speedometer 7, the distance between the two indicators is narrowed. That is, the visible range of the entire display device is narrowed to provide a display device that is easy to see, which leads to downsizing of the display device. Further, by disposing the cover portion 26 integrally formed with the see-through plates 22A and 22B in front of the peripheral edges of the tachometer 1 and the speedometer 7, the speedometer 7 and the tachometer 1 are provided.
Since it has a function of defining the display areas X1 and X2 of (1) and covers the overlapping portion, a display device having a good appearance can be obtained.

In the present embodiment, the upper case 25
Although the cover portion 26 is provided in the above, the cover portion 26 may be used as the look-back plate 21 by using the same structure as the conventional example.
The speedometer 7 may be arranged in the same manner as in the conventional example, and the light guide 3 of the tachometer 1 may be superposed on the edge of the liquid crystal display element 8 on the side of the inclined wall 16. Further, the inclined wall 16 is not necessarily provided, and the liquid crystal display element 8 may be held by the wall portion 13 and the locking piece 15 and pressed by the light guide 3 (pressed by overlapping).

Further, although the light guide 3 is overlapped with the edge of the liquid crystal display element 8, the tachometer 1 (second display) using a rigid display plate regardless of the presence of the light guide 3 is used. The display boards may be overlapped. In addition, a sponge 29 is provided at a position where the liquid crystal display element 8 and the light guide 3 are superposed.
However, the light guide 3 may be directly superposed on the liquid crystal display element 8. At this time, a convex portion may be provided on the back surface of the light guide body 3 and the convex portion may be in contact with the liquid crystal display element 8. However, the elastic member between the liquid crystal display element 8 and the light guide 3 is better in terms of quality because the liquid crystal display element 8 is prevented from being lifted upward as described above, and the liquid crystal display element is better. 8 and the light guide 3 also serve as a buffering effect.

[0027]

As an effect of the first aspect, it is possible to suppress a cost increase and obtain a display device of good quality.

As an effect described in claim 2, it is possible to obtain a display device which suppresses cost increase, is easy to see, is not inferior in appearance, and has good quality.

In addition to the effects described above, a display device of higher quality can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a display device showing an embodiment of the present invention.

FIG. 2 is a sectional view of the speedometer.

FIG. 3 is a partial cross-sectional view showing a holding state of the liquid crystal display element.

FIG. 4 is a cross-sectional view showing a conventional display device.

FIG. 5 is a partial cross-sectional view showing a holding state of the liquid crystal display element.

FIG. 6 is a partial cross-sectional view showing an assembling procedure of the liquid crystal display element.

[Explanation of symbols]

1 Tachometer (second display) 3 Light guide 4 display board 7 Speedometer (first display) 8 Liquid crystal display element (display element) 9 housing X1, X2 display area 25 upper case 26 Cover 29 Sponge (elastic member)

Claims (3)

[Claims] 1. A display device in which a first display device having a display element held by a housing and a second display device having a display plate or a display plate and a light guide are arranged side by side. A display device, wherein the edge of the display element is overlapped with the edge of the display element. 2. A display device in which a first display device having a display element held by a housing and a second display device having a display plate or a display plate and a light guide are arranged in parallel. The first and second display devices are covered with the display plate or the light guide member, and the cover parts that define the display areas of the first and second display devices are overlapped with the display device or the light guide member. A display device characterized by being arranged in front of. 3. The display device according to claim 1, wherein an elastic member is arranged at the overlapping position.