JP5775763B2 - Vehicle instrument - Google Patents

Description

  The present invention relates to a vehicular instrument including a liquid crystal panel on which various states of a vehicle such as a travel distance and a fuel remaining amount are displayed.

  Conventionally, a vehicle instrument provided in front of a driver's seat of a vehicle is provided with a liquid crystal panel that displays various states of the vehicle such as a travel distance and a remaining amount of fuel. The liquid crystal panel is not self-luminous, and displays characters or the like by transmitting a light source disposed on the back side or transmitting / reflecting sunlight.

  By the way, if the light emitted from the light source arranged on the back side of the liquid crystal panel is directly transmitted to the transmission part of the liquid crystal panel, the area near the light source of the liquid crystal panel becomes brighter than the other areas and uneven illumination occurs. Resulting in.

  In order to avoid this, for example, the vehicular instrument of Patent Document 1 includes a shielding plate that blocks light emitted from a light source disposed near the outer periphery of the liquid crystal panel and directly directed to the liquid crystal panel, and a light source to the liquid crystal panel. A reflection plate that reflects and diffuses the light emitted along the liquid crystal panel toward the liquid crystal panel is provided, and the light unevenness is eliminated by directing the light emitted from the light source toward the liquid crystal panel.

Japanese Patent No. 4514569 (paragraphs 0027-0033, FIG. 2)

  However, even with the structure as in Patent Document 1, when the area of the liquid crystal panel is large, the region far from the light source is difficult to reach light, so it becomes darker than the region near the light source, resulting in illumination unevenness. End up. In order to avoid this, the shape of the shielding plate is changed to reduce the amount of light that is reflected and diffused toward the area near the light source of the liquid crystal panel on the reflection plate, thereby eliminating uneven illumination on the entire liquid crystal panel. However, if it does so, the illumination of a liquid crystal panel will become dark overall.

  The present invention has been made in view of such points, and an object of the present invention is to provide a vehicle instrument that can illuminate the entire liquid crystal panel in a balanced and bright manner even when the area of the liquid crystal panel is large. There is to do.

  In order to achieve the above object, the present invention is characterized in that two light sources are used and a method for transmitting light emitted from the two light sources to the liquid crystal panel is devised.

That is, in the first invention, a liquid crystal panel, a printed board on which electronic components are mounted, a panel-like attachment means for attaching the liquid crystal panel to the surface side of the printed board with a space from the printed board, and the liquid crystal A pair of light sources mounted on the printed circuit board in the vicinity of the outer peripheral edges of the panel facing each other, and an illumination space formed between the printed circuit board, the liquid crystal panel, and the mounting means; The first light that is positioned on the liquid crystal panel side of the two light sources, covers the two light sources individually from the liquid crystal panel side, and travels in a direction substantially orthogonal to the liquid crystal panel among the light emitted from the light sources. a pair of shielding portions for shielding, positioned in the middle of both light sources, and, a pair of inclined surface portion facing the respective light source side, one side and the other of the lighting space bordering the both inclined surface With divided into a side, the second light directed in a direction substantially along the liquid crystal panel of the light emitted from both the light source and a reflecting portion for reflecting diffused toward the liquid crystal panel is provided, one of the shielding portion above , the third light so as not to transmit a portion corresponding to one side of the lighting space in the liquid crystal panel except for the first and second light out of the light emitted from one light source above and, the liquid crystal while it positioned so as to transmit a portion corresponding to the other side of the illumination space definitive to the liquid crystal panel passes between the panel and the reflecting part, the other shielding portion, the light emitted from the other light source Among these, the third light except the first and second lights is not transmitted to a portion corresponding to the other side of the illumination space in the liquid crystal panel, and between the liquid crystal panel and the reflecting portion. It and is located so as to transmit a portion corresponding to one side of the lighting space in the liquid crystal panel.

According to a second invention, in the first invention, the attachment means is provided spaced apart in a direction intersecting with the parallel arrangement direction of the two light sources, and substantially together with the shielding part and the reflection part. a rectangular frame shape, the light emitted from the both the light source and wherein that you have provided an inner wall portion for reflecting diffused toward the liquid crystal panel.

According to a third aspect, in the second aspect, on the side of each shielding portion of the inner wall portion, a facing surface portion is provided to face the shielding portion, and the facing surface portion is emitted from each of the light sources. The light is reflected and diffused toward the liquid crystal panel.

According to a fourth invention, in any one of the first to third inventions, the shielding portions are inclined with respect to the liquid crystal panel while approaching each other toward the printed circuit board side, and their extended ends Is located at a predetermined distance from the surface of the printed circuit board.

In the first aspect of the invention, one light source side of the liquid crystal panel emits light from one light source and reflected and diffused by the reflecting portion, and light emitted from the other light source and directly reaches the reflecting portion. On the other hand, on the other light source side of the liquid crystal panel, in addition to the light emitted from the other light source and reflected and diffused by the reflecting portion, the light emitted from one light source and directly reaching the reflecting portion is transmitted. It becomes transparent. Therefore, even when the area of the liquid crystal panel is large, the entire liquid crystal panel can be illuminated in a well-balanced and bright manner while eliminating uneven illumination .

It is a front view of the meter for vehicles concerning the embodiment of the present invention. It is a disassembled perspective view of the vehicle meter which concerns on embodiment. It is a perspective view of the attachment member concerning an embodiment. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is merely exemplary in nature.

  FIG. 1 shows a vehicular instrument 1 according to an embodiment of the present invention. The vehicle instrument 1 is housed in an instrument panel (not shown) located in front of the driver's seat so that the driver can grasp various states of the vehicle, and a digital display that displays the vehicle speed in the center. The displayed speed display 1a is located, and on the right side in the vehicle width direction of the speed display 1a, an integrated display 1b that displays the travel distance of the vehicle, an automatic selector display 1c that indicates the state of the automatic selector, and a remaining amount of fuel are displayed. Three fuel remaining amount indications 1d to be performed are arranged close to each other.

  As shown in FIG. 2, the vehicle instrument 1 includes a resin instrument main body 10 having a substantially rectangular panel shape extending in the vehicle width direction, and a plurality of pieces corresponding to the speed display 1 a are provided at the center of the instrument main body 10. A small hole 10 a is formed, and a pair of substantially rectangular through windows 10 b are formed on both sides of the instrument body 10.

  A resin dial 11 for displaying scales and characters is arranged on the surface side of the instrument body 10 so as to cover the entire surface side of the instrument body 10.

  Further, on the surface side of the dial 11, a resin visor 12 having an annular shape along the outer peripheral edge of the instrument body 10 and a protective glass 13 made of a transparent resin covering the entire area of the instrument body 10 are provided. The protective glass 13 is assembled to the inside of the visor 12, and the visor 12 is assembled to the instrument body 10.

  On the other hand, a substantially rectangular plate-like printed circuit board 14 on which electronic components and the like are mounted is disposed on the back surface side of the instrument body 10, and the printed circuit board 14 includes a rear case 15 disposed on the back surface side thereof. It is sandwiched between the instrument body 10 and fixed.

  On the surface side of the printed circuit board 14 on the right side in the vehicle width direction, a substantially rectangular liquid crystal panel 2 for displaying the integrated display 1b, the automatic selector display 1c, and the remaining fuel display 1d, respectively, and the printed circuit board 14 are spaced from each other. A panel-shaped attachment member (attachment means) 3 is provided for attaching the liquid crystal panel 2 to the printed circuit board 14 with a gap between the printed circuit board 14, the liquid crystal panel 2, and the attachment member 3. 4 and 5) are formed.

  Further, as shown in FIG. 4, a pair of LEDs (light sources) 7 are mounted on the printed circuit board 14 on both sides in the vehicle width direction of the liquid crystal panel 2 and in the vicinity of the outer peripheral edges facing each other. Yes.

  The liquid crystal panel 2 is configured such that characters and the like are displayed by transmitting light, and faces the inside of the vehicle from the through window 10b.

  As shown in FIGS. 2 and 5, a plurality of needle-like terminals 2 a extending toward the printed circuit board 14 are provided on the upper edge and the lower edge of the liquid crystal panel 2 in the vehicle width direction. 2a is connected to a terminal block 14c (described in FIG. 5) of the printed circuit board 14.

  Further, on the back surface of the liquid crystal panel 2, a resin-made diffusion plate 2b (see FIG. 2) that disperses transmitted light and suppresses illumination unevenness is disposed.

  As shown in FIG. 3, the mounting member 3 has a substantially left-right symmetric shape in plan view, and extends from the outer peripheral edge of the frame portion 31 toward the printed circuit board 14 side. And an outer wall portion 32.

  The upper side portion and the lower side portion of the frame portion 31 are closer to the printed circuit board 14 side than the side portions in the vehicle width direction, and the frame portion 31 is located on both sides of the portion, that is, in the vicinity of the four corners of the frame portion 31. The locking pieces 31a that are bent outward are integrally formed, and the locking pieces 31a are locked to the outer peripheral edge of the liquid crystal panel 2 so that the liquid crystal panel 2 is attached to the mounting member 3. It has become.

  Further, an elongated through hole 31b extending in the vehicle width direction is formed in the upper side and lower side of the frame part 31, and each terminal 2a of the liquid crystal panel 2 is inserted into the through hole 31b. ing.

  On the other hand, a pair of engaging claws 32a are provided on both side portions of the outer wall portion 32 at a predetermined interval in the vertical direction, and the engaging claws 32a engage with engaging holes (not shown) of the printed circuit board 14. Thus, the attachment member 3 is attached to the printed circuit board 14.

The mounting member 3 includes a pair of left and right first inner wall portions (shielding portions) 33 that extend from the inner peripheral edges on both sides of the frame portion 31 to the printed circuit board 14 side, and the upper and lower sides of the frame portion 31. And a pair of second inner wall portions 34 ( provided spaced apart in a direction intersecting the direction in which the LEDs 7 are juxtaposed) extending from the inner peripheral edge to the printed circuit board 14 side.

  As shown in FIG. 4, the pair of first inner wall portions 33 are gently inclined with respect to the liquid crystal panel 2 while approaching each other toward the printed circuit board 14, and the extending ends thereof are A light passage port 33 a is formed between the extended end of the first inner wall portion 33 and the surface of the printed circuit board 14 at a position spaced apart from the surface of the printed circuit board 14. .

  The pair of first inner wall portions 33 are positioned on the liquid crystal panel 2 side of the LEDs 7, cover the LEDs 7 individually from the liquid crystal panel 2 side, and the liquid crystal panel 2 out of the light emitted from the LEDs 7. The first light L1 traveling in a direction substantially orthogonal to the first light L1 is blocked (see FIG. 4).

  On the other hand, as shown in FIG. 5, the pair of second inner wall portions 34 are gently inclined with respect to the liquid crystal panel 2 while approaching each other toward the printed circuit board 14 side, and the extension ends thereof are The light reaches the surface of the printed circuit board 14, and the light emitted from both LEDs 7 is reflected and diffused toward the liquid crystal panel 2.

As shown in FIG. 3, approximately half of the extended end side is recessed in both sides in the vehicle width direction of the second inner wall 34 (on the first inner wall 33 side), and the first inner wall 33 extends. An opposing surface portion 34a facing the end edge and an intersecting surface portion 34b intersecting with the extending end edge of the first inner wall portion 33 are provided.

  The facing surface portion 34 a is inclined while approaching the first inner wall portion 33 as it goes to the printed board 14 side, while the intersecting surface portion 34 b is substantially perpendicular to the printed board 14.

  As shown in FIG. 3, the facing surface portion 34 a on the left side in the vehicle width direction substantially follows the liquid crystal panel 2 among the light emitted from the LED 7 located on the left side in the vehicle width direction (hereinafter referred to as the left LED 7). The second light L2 emitted toward the right side in the vehicle width direction and passing through the light passage port 33a on the left side in the vehicle width direction (hereinafter referred to as the left side light passage port 33a) The opposite surface portion 34a on the right side in the vehicle width direction is substantially aligned with the liquid crystal panel 2 out of the light emitted from the LED 7 located on the right side in the vehicle width direction (hereinafter referred to as the right LED 7). Second light L4 emitted toward the left side in the vehicle width direction and passing through the light passage port 33a on the right side in the vehicle width direction (hereinafter referred to as the right side light passage port 33a) is input to the right side portion of the liquid crystal panel 2 in the vehicle width direction. Reflection diffusion toward It is made as to the cause.

  A bridging portion (reflecting portion) 35 that bridges the extended end sides of the pair of second inner wall portions 34 is formed integrally in the approximate center of the mounting member 3, that is, between the LEDs 7. The bridging portion 35 is located substantially below the center of the liquid crystal panel 2.

As shown in FIG. 4, the bridging portion 35 has a substantially V-shaped tapered cross section on the liquid crystal panel 2 side, and has a substantially rectangular frame shape together with the first and second inner wall portions 33 and 34. In addition, the illumination space S is divided into a left side in the vehicle width direction and a right side in the vehicle width direction.

The bridging portion 35 has a pair of inclined surface portions 35a facing the left side and the right side in the vehicle width direction, and the tips thereof are slightly closer to the liquid crystal panel 2 side than the extending end of the first inner wall portion 33, and The position is a predetermined distance D from the back surface of the liquid crystal panel 2.

  The inclined surface portion 35a on the left side in the vehicle width direction in the bridge portion 35 is emitted toward the right side in the vehicle width direction so as to substantially follow the liquid crystal panel 2 out of the light emitted from the left LED 7, and passes through the left light passage port 33a. The passing second light L2 is reflected and diffused toward the left side of the liquid crystal panel 2 in the vehicle width direction.

And the 1st inner wall part 33 of the vehicle width direction left side is the said 3rd light L3 except the said 1st light L1 and the 2nd light L2 among the lights emitted from the said left side LED7 in the said liquid crystal panel 2. so as not to transmit to a portion corresponding to the left in the vehicle width direction of the lighting space S (one LED7 side), and the vehicle width direction right side of the lighting space S from between the liquid crystal panel 2 and the bridging portion 35 through being so that the position is transmitted through a portion corresponding to the right in the vehicle width direction of the lighting space S in the liquid crystal panel 2.

  On the other hand, the inclined surface portion 35a on the right side in the vehicle width direction of the bridge portion 35 is emitted toward the left side in the vehicle width direction so as to be substantially along the liquid crystal panel 2 out of the light emitted from the right LED 7, and the right light passage opening. The second light L4 passing through 33a is reflected and diffused toward the right side of the liquid crystal panel 2 in the vehicle width direction.

And the 1st inner wall part 33 of the vehicle width direction right side WHEREIN: The 3rd light L5 except the said 1st light L1 and the 2nd light L4 among the lights emitted from the said right side LED7 is the said in the said liquid crystal panel 2. so as not to transmit to a portion corresponding to the illumination space right in the vehicle width direction of S (other LED7 side), and the vehicle width direction left side of the lighting space S from between the liquid crystal panel 2 and the bridging portion 35 through being so that the position is transmitted through a portion corresponding to the left in the vehicle width direction of the lighting space S in the liquid crystal panel 2.

  As described above, according to the embodiment of the present invention, the left LED 7 side of the liquid crystal panel 2 emits from the right LED 7 in addition to the second light L2 emitted from the left LED 7 and reflected and diffused by the bridge portion 35. While the light L5 that reaches directly beyond the bridge portion 35 is transmitted, the right LED 7 side of the liquid crystal panel 2 is added to the second light L4 that is emitted from the right LED 7 and is reflected and diffused by the bridge portion 35. The third light L3 emitted from the left LED 7 and directly reaching the bridge portion 35 is transmitted. Therefore, even when the area of the liquid crystal panel 2 is large, the entire liquid crystal panel 2 can be illuminated in a well-balanced and bright manner while eliminating uneven illumination.

  Further, since the LED 7 is used as the light source, the light source becomes small, and the periphery of the liquid crystal panel 2 can be made compact.

  In the embodiment of the present invention, the LED is used as the light source. However, the present invention is not limited to this, and other types of light sources may be used.

  In the embodiment of the present invention, the instrument body 10 and the attachment member 3 are separate bodies, but they may be integrally formed.

  Furthermore, in this embodiment, although application about the vehicle instrument 1 used for a motor vehicle was demonstrated, for example, it may apply to a motorcycle and can also be applied to another vehicle.

  The present invention is suitable for a vehicular instrument provided with a liquid crystal panel on which various states of the vehicle such as a travel distance and a fuel remaining amount are displayed.

DESCRIPTION OF SYMBOLS 1 Vehicle instrument 2 Liquid crystal panel 3 Mounting member (mounting means)
7 LED (light source)
14 Printed circuit board 33 1st inner wall part (shielding part)
34 Second inner wall
34a opposite surface part 35 bridge part (reflection part)
S illumination space L1 first light L2, L4 second light L3, L5 third light

Claims (4)

LCD panel,
A printed circuit board on which electronic components are mounted;
Panel-like mounting means for mounting the liquid crystal panel on the surface side of the printed board with a space from the printed board;
A pair of light sources mounted separately on a printed circuit board near the outer peripheral edges of the liquid crystal panel facing each other;
An illumination space formed between the printed circuit board, the liquid crystal panel and the mounting means;
The mounting means is located on the liquid crystal panel side of the two light sources, and covers both the light sources individually from the liquid crystal panel side, and the first of the light emitted from the light sources is directed in a direction substantially orthogonal to the liquid crystal panel. A pair of shields that block the light,
It consists of a pair of inclined surface parts located between the two light sources and facing the light sources. The illumination space is divided into one side and the other side with the two inclined surface parts as a boundary. A reflecting portion for reflecting and diffusing the second light toward the liquid crystal panel in a direction substantially along the liquid crystal panel, is provided,
The one shielding portion does not transmit the third light except the first and second lights among the light emitted from the one light source to a portion corresponding to one side of the illumination space in the liquid crystal panel. in, and, while positioned so as to transmit a portion corresponding to the other side of the liquid crystal panel and the lighting space definitive to the liquid crystal panel through between the reflecting portion, the other shielding portion, of the other Of the light emitted from the light source, the third light excluding the first and second lights is not transmitted to the portion of the liquid crystal panel corresponding to the other side of the illumination space, and the liquid crystal panel and the reflection are not transmitted. A vehicle instrument characterized by being positioned so as to pass through a portion of the liquid crystal panel corresponding to one side of the illumination space . The vehicle instrument according to claim 1, wherein
The attachment means is provided spaced apart in a direction intersecting the parallel arrangement direction of the two light sources , and forms a substantially rectangular frame together with the shielding portion and the reflection portion, and is emitted from the both light sources. vehicle meter according to claim Rukoto light have the inner wall part for reflecting diffused toward the liquid crystal panel. The vehicle instrument according to claim 2, wherein
Opposite surface portions facing the shielding portions are provided on the shielding portions side of the inner wall portion, and the opposing surface portions reflect and diffuse second light emitted from the light sources toward the liquid crystal panel. A vehicle instrument characterized by the fact that In the vehicle meter according to any one of claims 1 to 3,
Both the shielding portions are inclined with respect to the liquid crystal panel while approaching each other toward the printed circuit board, and the extended ends thereof are located at a predetermined distance from the surface of the printed circuit board. An instrument for vehicles.

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