JPH084570Y2 - Display device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a display device such as a speedometer or a tachometer in which a pointer is combined with a fluorescent display tube (FIP) or a liquid crystal display element.

[Prior Art] Various instruments such as a speedometer and a tachometer are provided on a dashboard of a vehicle. These instruments are
Currently, there are many digital systems that show discrete values, but there is a growing demand for analog systems for users who want higher quality.

The present invention was created in view of the above circumstances,
(EN) Provided is an analog type display device having a high degree of freedom in design, a high degree of freedom in design, easy mounting, and excellent visibility.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a through hole formed in an arbitrary position of a display portion of a display element in the thickness direction of the display element, and a through hole provided in the through hole. A supporting shaft driven by driving means, a pointer provided at the tip of the supporting shaft in parallel with the display portion of the display element, an illuminating portion provided on the pointer for radiating light forward, the display element Light guide means for guiding the light to the illuminating section to give brightness to the pointer.

Further, the display element has a light emitting surface arranged on the pointer side, and further, the light guiding means is constituted by a plurality of reflecting surfaces provided inside the pointer, or the light guiding means is provided with the pointer. Another feature is that the support shaft and the plurality of reflecting surfaces provided inside the display element are provided, and that the illumination unit is formed as a rough surface that diffusely reflects light.

[Operation] According to the configuration of the present invention, the pointer can be arranged in the through hole without impairing the display function of the display element, and the pointer that moves parallel to the display portion of the display element guides light. Since it is illuminated with the light of the display element guided by the means, excellent visibility is obtained.

In addition, the one in which the light emitting surface of the display element is arranged on the pointer side is
The distance between the anode and the pointer is shortened, and the light emitted from the light emitting surface can be visually recognized without parallax.

Further, the light guide means constituted by a plurality of reflecting surfaces provided inside the pointer can reliably guide the light of the display element to the illumination section.

Further, the light guide means constituted by the pointer, the support shaft, and the plurality of reflecting surfaces provided inside the display element can guide the light to the illumination section more reliably.

In addition, since the illumination unit is formed on a rough surface that diffusely reflects light, the light is diffusely reflected from the illumination unit and radiated forward,
It can be seen from all directions.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is a plan view showing an embodiment of the display device of the present invention, FIG. 2 is a side sectional view of the display device shown in FIG. 1, and FIG. 3 is a partially enlarged sectional view of FIG. FIG. 4 and FIG. 4 are explanatory views of the arrangement state of the spacers.

The fluorescent display tube 1 is configured as a speedometer, which is one of the instruments arranged on the dashboard of a vehicle, and the display unit 2 displays the speed and the like. Inside the fluorescent display tube 1 between the display unit 2 and the back surface 3, the display unit 2
The anode 4, the cathode 5 and the heater 6 are arranged in this order from the side closer to the. Is displayed. Further, in the display portion 2 of the fluorescent display tube 1, a through hole 12 is formed so as to sandwich a cylindrical spacer 12a between the display portion 2 and the back surface 3, and this through hole is formed.
A support shaft 8 pivotally supporting a pointer 7 on the head is arranged in the head 12. The support shaft 8 is connected to a drive coil 9 that operates according to the speed, and is driven by the drive coil 9 to rotate.

The pointer 7 is made of an acrylic resin or the like in a transparent manner, and has a circular base portion 7a pivotally supported by the support shaft 8.
And a needle body 7b protruding from the base portion 7a, and an illuminating portion 7c that emits light toward the front. Further, the conical first reflecting surface 10a is provided on the upper portion of the base portion 7a, and the needle body 7
A flat second reflecting surface 10b is arranged under the b,
The first reflecting surface 10a receives light from the anode 4 of the display unit 2 and reflects it on the second reflecting surface 10b, and the second reflecting surface 10b guides the received reflected light to the illuminating unit 7c. (Refer to the arrows in FIGS. 2 and 3).

Further, a part of the anode 4 is arranged concentrically around the through hole 12 at a portion corresponding to the base portion 7a of the pointer 7, so that no matter where the pointer 7 is, it is sufficient for the illuminated portion 7c. The amount of light can be obtained.

Here, when the ignition key is inserted to start driving the vehicle, the fluorescent display tube 1 is turned on and the pointer 7 is rotated according to the vehicle speed. In this case, the display portion 2 of the fluorescent display tube 1 shines toward the driver, and at the same time, the light of the fluorescent display tube 1 is provided on the first reflecting surface provided from the anode 4 of the display portion 2 to the base portion 7a of the pointer 7.
It is projected on 10a. This light is reflected by the second reflecting surface 10b at the first reflecting surface 10a and guided from the second reflecting surface 10b to the illumination section 7c. As a result, the pointer 7 is illuminated by the illumination unit 7c,
The driver can visually recognize the speed from the pointer 7 that moves by emitting light.

Further, since the anode 4 forming the light emitting surface of the fluorescent display tube 1 is provided on the side of the display unit 2 and can be visually recognized with a small parallax, the display information can be reliably grasped. .

5 to 7 show another embodiment. In the fluorescent display tube 1, a heater 6, a cathode 5 and an anode 4 are sequentially arranged from the display section 2 side, and a first reflecting member 11a for reflecting the light from the anode 4 to the support shaft 8 side is arranged inside. is there. Further, the support shaft 8 is provided with a second reflecting member 11b which receives the light reflected from the first reflecting member 11b and reflects it toward the base portion 7a of the pointer 7, and the base portion 7a is provided with the light of the second reflecting member 11b. Third reflecting member 11c for reflecting toward the lower part of the needle body 7b
However, a fourth reflecting member 11d for reflecting the reflected light from the third reflecting member 11c to the illuminated portion 7c is arranged below the needle body 7b.

In the above embodiment, the light guide means is provided with the reflecting member. However, without providing a special reflecting member, the illuminated portion 13 facing the illuminated portion 7c of the pointer 7 is roughened to be transparent. If the structure is such that the formed pointer 7 is irradiated with the light of the fluorescent display tube 1 and the light of the fluorescent display tube 1 guided inside the pointer 7 is diffusely reflected by this rough surface and is irradiated forward, Although the brightness is slightly lowered, the pointer 7 can be made to shine with a simpler configuration than that in which a reflecting member is arranged on the pointer 7.
In addition, the pointer 7 can be seen from all directions.

Further, in the embodiment in which the reflecting member is provided on the pointer 7, it is needless to say that if the illuminating portion 7c is processed into a rough surface, the front surface of the illuminating portion 7c can be brighter and can be illuminated with more uniform brightness.

Further, by providing the anode 4 concentrically around the through hole 12 at a portion corresponding to the pointer base portion 7a, a sufficient amount of light can be obtained for the illuminated portion 7c regardless of the position of the pointer 7.

Further, although the fluorescent display tube 1 is used as the display element in the above-mentioned embodiment, a liquid crystal element may be used.

Further, in the above embodiment, the spacer 12a of another member is arranged at the position of the through hole 12, but the present invention is not limited to this, and the spacer 12a is not arranged at the position of the through hole 12 without displaying the display portion. 2 and the back surface 3 may be integrally formed. The point is that the inside of the display element may be formed in a sealed state at the position of the through hole 12.

[Advantages of Device] As described above, according to the present invention, since the through hole is formed in the display portion of the display element in the thickness direction of the display element, the display function of the display element is improved. The pointer can be placed in the through hole without damaging the display, and since the light from the display element is guided to the pointer to illuminate the pointer, the pointer emits light against the background of the display on the display section. It is possible to rotate while displaying an analog display, and the visibility of the analog display determined by the relative positional relationship between the display unit and the pointer is very high. Moreover, since the pointer emits light with the light emitted from the light emitting element, it is not necessary to separately provide a light source as the light source of the pointer, and this has an excellent effect that the overall thickness of the device can be reduced.

Further, since the light emitting surface of the display element is provided on the pointer side, the distance between the light emitting surface and the pointer is short, and the visual display content determined by the relative positional relationship between the display unit covering the light emitting surface and the pointer can be displayed without parallax. The effect is that it can be visually recognized and the display information can be accurately grasped.

Furthermore, since the light guide means is composed of a plurality of reflecting surfaces provided inside the pointer, it is possible to reliably guide the light emitted from the light emitting element to the illuminating section by using reflection, and to specify the brightness given to the pointer. There is an effect that it can be radiated intensively in the reflection direction of.

Further, since the light guide means is constituted by the pointer, the support shaft, and the plurality of reflecting surfaces provided inside the display element, it is possible to guide the light emitted by the light emitting element to an appropriate illuminating section along the reflected light path, By suppressing light leakage in the middle of the optical path, it is possible to more reliably guide the light to the illumination unit.

Furthermore, because the illumination unit is formed on a rough surface that diffusely reflects light, the light guided to the illumination unit is diffusely reflected and radiated forward. The pointer can be made to be shining, and if it has a reflecting surface, it is brighter, and the pointer can be made to shine with more uniform brightness.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a display device of the present invention,
2 is a cross-sectional view of the display device shown in FIG. 1 seen from the side, FIG. 3 is a partially enlarged cross-sectional view of FIG. 2, and FIG. 4 is an explanatory view of a spacer arrangement state. FIG. 7 to FIG. 7 are a plan view, a sectional view and a partially enlarged sectional view showing another embodiment of the display device of the present invention. 1 ... Fluorescent display tube 2 ... Display section 3 ... Rear surface 4 ... Anode 5 ... Cathode 6 ... Heater 7 ... Pointer 7a ... Base 7b ... Needle body 7c ... Illumination section 8 ... Support shaft 9 ... Drive coil 10a, 10b ... Reflective surface 11a, 11b, 11c, 11d ... Reflective member 12 ... Through hole 12a ... Spacer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G12B 11/04 P 6947-2F

Claims (5)

[Scope of utility model registration request] 1. A through hole formed in a thickness direction of the display element at an arbitrary position of a display portion of the display element, a support shaft disposed in the through hole and driven by a driving means, and the support shaft. A pointer provided at the tip of the display element in parallel with the display section of the display element, an illuminating section provided on the pointer for irradiating light forward, and guiding the light of the display element to the illuminating section, and providing brightness to the pointer. A display device comprising: a light guide means for giving the light. 2. The display device according to claim 1, wherein the display element has a light emitting surface disposed on the pointer side. 3. The light guide means comprises a plurality of reflecting surfaces provided inside the pointer.
Or the display device according to 2. 4. The display device according to claim 1, wherein the light guiding means is constituted by the pointer, the support shaft, and a plurality of reflecting surfaces provided inside the display element. 5. The display device according to any one of claims 1 to 4, wherein the illuminating part is formed on a rough surface that diffusely reflects light.