JP2014010274A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an appearance of transmitted illumination.SOLUTION: A display device includes: a translucent plate 30; a light source which transmittedly illuminates prescribed display regions W1 and W2 provided in the translucent plate 30; and a shield wall 21 which is in a cylindrical shape having an opening end 21b of a shape along a region boundary of the display regions W1 and W2, and which leads light of the light source disposed inside the cylinder to the display regions W1 and W2 while shielding it from leaking to the outside of the cylinder. Then, a light shield part 31, which shields light L2 transmitting in a plate face direction (the lateral direction in Fig. 5) in the translucent plate 30 from transmitting from inside of the display region W2 to the outside, is formed in the translucent plate 30. Thereby, it can be suppressed that the light L2 leaks from the display region W2 which is transmittedly illuminated to the adjacent display region W1 during lights out. Therefore, it can be suppressed that when the light source of the display region W2 is turned on, the adjacent display region W1 becomes dimly bright, thus, the appearance of the transmitted illumination can be improved.

Description

  The present invention relates to a display device having a display region that is transmitted and illuminated.

  Patent Documents 1 to 3 disclose vehicle display devices that display various warnings. These display devices include a light-transmitting plate on which a light-shielding layer is printed, and a portion of the light-transmitting plate on which the light-shielding layer is not printed is transmitted and illuminated as a display area to display a warning.

  Since a plurality of types of warning displays are generally performed, a plurality of display areas are provided adjacent to each other on the translucent plate. Therefore, when a light source corresponding to a predetermined display area is turned on, it is required to prevent light from the light source from leaking to the adjacent display area. Therefore, the display devices described in Patent Documents 1 to 3 include a shielding wall for each display region. The shielding wall has a cylindrical shape having an opening end shaped along the region boundary of the display region, and guides the light from the light source arranged inside the tube to the display region while shielding the light from leaking outside the tube. Is.

JP 2004-161151 A JP 11-2222077 A Japanese Utility Model Publication No. 6-48345

  According to the shielding wall described above, it is possible to avoid the light of the light source directly entering the adjacent display area. However, light incident on a predetermined display area of the translucent plate travels in the direction of the plate surface through the translucent plate (see arrow L2 in FIGS. 5, 6, and 7), and the adjacent display area. The present inventors obtained the knowledge that it leaked out. That is, when the light source of a predetermined display area is turned on to transmit illumination, light leaks to the surrounding display area through the inside of the translucent plate. As a result, the display area around the predetermined display area becomes dimly bright and looks bad.

  In particular, in recent years, there is a tendency to use light emitting diodes as light sources. Since the light emitting diodes are small in size, a layout in which many display areas are concentrated in a limited area has become possible. In this case, as described above, it becomes noticeable that the adjacent display area becomes dimly bright, and the unpleasant appearance becomes noticeable.

  The present invention has been made in view of the above problems, and an object thereof is to provide a display device that improves the appearance of transmitted illumination.

  The invention for achieving the above object is characterized by the following points. That is, in the translucent plate formed in a plate shape with a translucent material and the predetermined display area provided on the translucent plate, the light is transmitted in the thickness direction of the translucent plate, A cylindrical light source having a light source that transmits and illuminates the display area and an open end that follows the boundary of the display area, and shields the light from the light source disposed inside the cylinder so as not to leak outside the cylinder. A shielding wall that leads to the display area, and the translucent plate is provided with a plurality of the display areas adjacent to each other, and the light source and the shielding wall are provided for each of the display areas. The light-transmitting plate is formed with a light-shielding portion that blocks light transmitted through the light-transmitting plate in the direction of the plate surface from being transmitted from the inside to the outside of the display area.

  According to this, it can suppress that the light which propagates the inside of a translucent board in the plate | board surface direction is interrupted | blocked by a light-shielding part, and leaks to an adjacent display area. Therefore, when the light source of a certain display area is turned on, it can suppress that the adjacent display area becomes bright brightly, and the appearance of transmitted illumination can be improved.

The front view which shows the display apparatus concerning 1st Embodiment of this invention. II-II sectional drawing of FIG. The front view of the light-shielding member and light source concerning 1st Embodiment. The front view of the translucent board concerning 1st Embodiment. The enlarged view of FIG. 2 which shows the shape of the light-shielding part concerning 1st Embodiment. Sectional drawing of the display apparatus concerning 2nd Embodiment of this invention. Sectional drawing of the display apparatus concerning 3rd Embodiment of this invention.

  Hereinafter, each embodiment according to the present invention will be described with reference to the drawings. In the following embodiments, the configurations of the parts denoted by the same reference numerals in the drawings are the same or equivalent to each other, and the description thereof is cited.

(First embodiment)
In this embodiment, the display device of the present invention is applied to a meter M provided on an instrument panel of a vehicle. The meter M displays the driving state of the vehicle such as the vehicle speed, and displays a warning to notify the vehicle occupant when various abnormalities occur in the vehicle.

  FIG. 1 is a front view showing a portion (corresponding to a display device) that performs warning display in the meter M. The display device can display a plurality of types of warning symbols S1 to S13, and when an abnormality occurs, the warning symbol representing the content of the abnormality is transmitted and illuminated so that an occupant can visually recognize and notify. FIG. 1 shows a state in which all the warning symbols S1 to S13 are transmissively illuminated and visible, but the warning symbols S1 to S13 cannot be visually recognized when the transmissive illumination is normally turned off.

  As shown in FIG. 2, the display device includes a substrate 10, a light source 11, a shielding member 20, a translucent plate 30 and a candle plate 40. A plurality of light sources 11 and a microcomputer (not shown) for controlling the operation of the light sources 11 are mounted on the substrate 10 on which printed wiring is applied. For the light source 11, a light emitting diode is employed. Each light source 11 is arranged at a position corresponding to the warning symbols S1 to S13.

  As shown in FIGS. 2 and 3, the shielding member 20 is made of a resin having a light shielding property and is assembled to the substrate 10. The shielding member 20 is formed with a shielding wall 21 for each of the warning symbols S1 to S13. The shielding wall 21 has a cylindrical shape having openings 21a and 21b at both ends. Corresponding light sources 11 are arranged in the opening on the substrate 10 side (back side opening 21 a) in the shielding wall 21. Corresponding warning symbols S <b> 1 to S <b> 13 are located in an opening (front opening 21 b) on the light transmission plate 30 side of the shielding wall 21.

  The translucent plate 30 is made of a translucent resin and has a flexible sheet shape, and is sandwiched between the shielding member 20 and the candle plate 40. A light shielding layer (not shown) is printed on the light transmitting plate 30. The light shielding layer is printed so that the portion (non-printing portion) where the light shielding layer is not printed in the translucent plate 30 has the shape of the warning symbols S1 to S13.

  A portion of the translucent plate 30 facing the front opening 21b corresponds to the display areas W1 to W13 corresponding to each of the warning symbols S1 to S13. As shown by the alternate long and short dash line in FIG. 1, a plurality of display areas W1 to W13 are densely provided so as to be adjacent to each other. The light source 11 and the shielding wall 21 are provided for each of the display areas W1 to W13. Therefore, it can be said that each shielding wall 21 has a cylindrical shape having an opening end (front opening 21b) having a shape along the boundary between the display areas W1 to W13 (see the dashed line in FIG. 1).

  The light emitted from the light source 11 (see arrow L1 in FIG. 2) passes through the non-printed portions of the display areas W1 to W13 in the light transmitting plate 30 in the thickness direction of the light transmitting plate 30 (vertical direction in FIG. 2). To penetrate. Thereby, the display areas W1 to W13 are illuminated. In addition, if a material with high light-shielding property is employ | adopted for the coating material used for printing of a light shielding layer, the light of the light source 11 permeate | transmits only the non-printing part among display areas W1-W13. On the other hand, a light-transmitting material may be used for the light shielding layer paint so that the light from the light source 11 can be transmitted from the printing portion of the display areas W1 to W13.

  The candle plate 40 is made of a resin having translucency, and is disposed on the opposite side of the light source 11 with respect to the translucent plate 30. The candle plate 40 diffuses the light from the light source 11 that has passed through the translucent plate 30 to make the desired design look good. In carrying out the present invention, the candle plate 40 may be eliminated.

  As shown in FIG. 4, in the translucent plate 30, slits 31 (light shielding portions) extending along the region boundaries are formed at the region boundary portions of the plurality of display regions W <b> 1 to W <b> 13. The slit 31 may be formed in an annular shape so as to surround each of the display regions W1 to W13. However, in the present embodiment, the slit 31 is partially partially formed in a portion where the distance between the light sources 11 is the closest among the region boundaries. Is forming.

  As shown in FIG. 5, the slit 31 is formed in a shape penetrating in the thickness direction of the translucent plate 30 (vertical direction in FIG. 5). In other words, the end surfaces 31a and 31b of the light transmitting plate 30 where the slits 31 are formed are separated from each other, and an air layer penetrating in the thickness direction exists between the both end surfaces 31a and 31b.

  An end surface of the shielding wall 21 that is in contact with the translucent plate 30 and that forms the front opening 21b is referred to as an upper end surface 21c. And the slit 31 is formed in the part which opposes and contacts the upper end surface 21c among the translucent plates 30. FIG. Specifically, the slit 31 is located between the boundary lines of the display areas W1 to W13 (see the one-dot chain line in FIGS. 1 and 2).

  The slit 31 is formed by using a punching device disclosed in Japanese Patent Application Laid-Open No. 2009-233759. This type of punching device (not shown) includes a punching die, a table, a pressing machine, and the like. In the punching die, a plurality of punching blades are attached at positions that match the arrangement pattern of the slits 31 shown in FIG. Hereinafter, a procedure for forming the slit 31 will be described. First, a sheet serving as a base material of the translucent plate 30 is placed on a table. Next, the pressing machine is operated to press the punching die against the sheet. At this time, the slit 31 is formed by the punching blade attached to the punching die punching out a predetermined position of the base material sheet. Specific examples of the punching blade include a well-known Thomson blade, a pinnacle blade, and an engraving blade.

  As described above, according to the present embodiment, the slit 31 is formed at the boundary between the display areas W1 to W13 in the translucent plate 30, so that the light transmitted through the translucent plate 31 in the plate surface direction (in FIG. 5). (See arrow L2) is blocked by the slit 31. Therefore, light leakage through the inside of the translucent plate 31 from the inside to the outside of the display areas W1 to W13 is suppressed. Therefore, for example, when the light source 11 corresponding to the display area W2 is turned on and the warning symbol S2 is transmitted and illuminated, it is possible to prevent the adjacent display area W1 from becoming brightly bright, and the appearance of the transmitted illumination of the warning symbol S2 can be improved. .

  Furthermore, in the present embodiment, the slit 31 having a shape penetrating the translucent plate 30 is used as the “light-shielding portion”, so that the light-shielding property by the light-shielding portion can be improved as compared with the case where the slit 31 is not completely penetrated (see FIG. 6). Moreover, since the end surfaces 31a and 31b of the part where the slit 31 is formed in the light transmitting plate 30 are separated and an air layer exists between the both end surfaces 31a and 31b, the both end surfaces are brought into close contact with each other. Compared to (see FIG. 7), the light shielding property by the light shielding portion can be improved.

(Second Embodiment)
In the first embodiment, the slit 31 having a shape penetrating the translucent plate 30 is used as a “light-shielding portion”. On the other hand, in this embodiment shown in FIG. 6, the groove-shaped slit 32 that does not penetrate in the thickness direction of the translucent plate 30 is used as a “light-shielding portion”. The slit 32 has a groove shape cut out from the light source side of the translucent plate 30. Moreover, the end surfaces 32a and 32b of the part in which the slit 32 is formed among the translucent plates 30 are separated, and an air layer exists between the both end surfaces 32a and 32b.

  Furthermore, in the said 1st Embodiment, the end surfaces 31a and 31b of the translucent board 30 are parallel to the plate | board thickness direction of the translucent board 30 (refer FIG. 5). On the other hand, the end surfaces 32a and 32b according to the present embodiment are inclined with respect to the thickness direction of the translucent plate 30 (see FIG. 6). If the above-described Thomson blade is employed, it is possible to easily form the non-penetrating slit 32 shown in FIG. 6 using the above-described punching device.

  As described above, according to the present embodiment, the light leaking through the light transmitting plate 31 can be suppressed by the slit 32 in the same manner as the first embodiment. In addition, the drops listed below are also demonstrated.

  If the slit 31 is formed in a penetrating shape as shown in FIG. 5, when the slit 31 is formed in an annular shape so as to surround the warning symbols S <b> 1 to S <b> 13, the translucent plate 30 is divided into a plurality of parts by the slit 31. Moreover, even if it is not formed in an annular shape, the translucent plate 30 is inconvenient to handle in the manufacturing process of the display device, such as the translucent plate 30 rolling up at the slit 31 portion. On the other hand, in this embodiment, as shown in FIG. 6, the slit 32 is formed by leaving the portion indicated by the reference numeral 32c in the light transmitting plate 30, so that the above-described rolling does not occur. Therefore, the translucent plate 30 can be easily handled in the manufacturing process.

  When the slit 31 has a penetrating shape as shown in FIG. 5, there is a possibility that the opening of the slit 31 on the side opposite to the shielding wall 21 may be visually recognized by the user. bad. In this embodiment in view of this point, as shown in FIG. 6, the slit 32 has a shape cut out from the light source 11 side of the light transmitting plate 30. Therefore, an opening does not appear on the opposite side of the shielding wall 21 in the slit 31, and it is possible to eliminate the concern about deterioration in appearance due to the slit 31 being visually recognized.

  As shown in FIG. 6, the slit 32 according to the present embodiment has the end faces 32 a and 32 b inclined. For this reason, it is possible to promote the reflection of the light L2 transmitted through the translucent plate 31 by the end faces 32a and 32b (see reference numeral L3 in FIG. 6), and thus the amount of light leaking through the slit 32 can be reduced. Therefore, the effect of suppressing light leakage with the slit 32 can be promoted.

(Third embodiment)
In each said embodiment, the end surface 31a, 31b, 32a, 32b of the part in which the slits 31 and 32 are formed among the translucent plates 30 is spaced apart, and an air layer exists. On the other hand, in this embodiment shown in FIG. 7, the notch 33 where the air layer does not exist is formed as a light shielding portion. That is, the end surfaces 33a and 33b of the portion where the cut 33 is formed in the light transmitting plate 30 are in close contact with each other.

  This notch 33 can be formed using the punching device described above. For example, the pressing value by the pressing machine is adjusted so as not to penetrate the base material sheet with the punching blade. In addition, when the punching blade is pressed against the base material sheet, the base material sheet is elastically deformed, and when the punching blade is pulled out from the base material sheet, the elastic deformation is released, and the end surface is moved by the spring back. It behaves so that 33a and 33b approach. Therefore, if a punching blade having a sufficiently small blade edge angle is used, it is possible to easily realize the cut 33 in which the end faces 33a and 33b are in close contact with each other by the spring back.

  As described above, also in the present embodiment, light leakage transmitted through the inside of the light transmitting plate 31 can be suppressed by the cut 33 in the same manner as in the second embodiment. Moreover, since the notch 33 is not penetrated, the translucent plate 30 can be easily handled in the manufacturing process. Moreover, since the notch 33 is formed from the light source 11 side in the translucent plate 30, it is possible to eliminate the concern about deterioration in appearance due to the notch 33 being visually recognized.

(Other embodiments)
The present invention is not limited to the description of the above embodiment, and may be modified as follows. Moreover, you may make it combine the characteristic structure of each embodiment arbitrarily, respectively.

  -The light-shielding parts 31, 32, and 33 concerning each said embodiment are partially formed in the part where the distance of the light sources 11 is the nearest among the area | region boundaries surrounding each of display area W1-W13. On the other hand, the light shielding portions 31, 32, 33 may be formed in an annular shape surrounding the display areas W1-W13.

  In the example shown in FIG. 7, the end surfaces 33a and 33b where the notches 33 are formed are formed so that the end surfaces 33a and 33b are parallel to the plate thickness direction, but the end surfaces 33a and 33b are inclined with respect to the plate thickness direction. The notch 33 may be formed as described.

  In the example shown in FIG. 7, the notch 33 has a non-penetrating shape, but may have a shape that penetrates the translucent plate 30.

  In the example shown in FIG. 2, a light emitting diode is employed as the light source 11, but the light source of the present invention is not limited to the light emitting diode, and for example, a known bulb may be employed.

  In the example shown in FIGS. 6 and 7, the slit 32 and the cut 33 are formed from the light source 11 side of the translucent plate 30, but the light shielding portion of the present invention is formed from the opposite side of the light source 11. The shape may be sufficient.

  DESCRIPTION OF SYMBOLS 11 ... Light source, 21 ... Shielding wall, 21b ... (open end), 30 ... Translucent plate, 31a, 31b, 32a, 32b, 32a, 32b ... End surface, 33 ... Light-shielding part, W1-W13 ... Display area.

Claims (6)

A translucent plate (30) formed into a plate shape with a translucent material;
In a predetermined display area (W1 to W13) provided in the light transmissive plate, a light source (11) that transmits and illuminates the display area by transmitting light in the thickness direction of the light transmissive plate;
It has a cylindrical shape having an opening end (21b) shaped along the boundary of the display area, and guides the light from the light source disposed inside the cylinder to the display area while blocking the light from leaking outside the cylinder. A shielding wall (21);
With
The translucent plate is provided with a plurality of the display areas adjacent to each other, and the light source and the shielding wall are provided for each of the display areas,
The light transmitting plate is formed with a light shielding portion (31, 32, 33) that blocks light transmitted in the plate surface direction from the inside to the outside of the display area. Display device.   2. The display device according to claim 1, wherein the light shielding portion is a slit formed in a thickness direction of the light transmitting plate.   The display device according to claim 2, wherein the light-shielding portion has a groove-shaped slit shape that does not penetrate in the thickness direction of the light-transmitting plate.   4. The display device according to claim 3, wherein the light shielding portion has a groove-shaped slit shape cut out from the light source side of the light transmitting plate.   The display device according to claim 2, wherein the light-shielding portion (31) has a slit shape penetrating in the thickness direction of the translucent plate.   The end face (32a, 32b) of the portion where the light shielding part (32) is formed in the translucent plate is inclined with respect to the plate thickness direction. The display device according to one.

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