JP2019056735A - Display device - Google Patents

Abstract

To provide a display device having seamless feeling in appearance even if external light enters when a light source is turned off.SOLUTION: A low reflective processing layer 4b is provided on a rear surface and a front surface of a display base material 4a in a display device that shows information to a user by lighting/lights-out of a light source 2 and a shape of a light emitting region b. Thus, difference in appearance between a first light shielding region a1 and the light emitting region b is reduced even if external light enters when the light source is turned off.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a display device.

  A display that has light-emitting areas separated by a light-shielding wall and a printing layer, lights up light sources such as LEDs mounted on the board individually, and expresses numbers and icons by the shape of the light-emitting areas and the combination of light sources to be turned on There is a device.

JP 2014-91477 A

  However, in the above-described display device, when the display area is illuminated with external light when the light source is turned off, the way the external light is reflected differs between the light shielding area and the light emitting area, and there is a difference in appearance between the light shielding area and the light emitting area. There was a problem that it occurred and the sense of unity was impaired.

  Accordingly, an object of the present invention is to provide a display device that has a seamless feeling with a small difference in appearance between the light shielding region and the light emitting region even when the light source is turned off, focusing on the above-described problems.

In order to solve the above-described problem, the present disclosure provides a light source, a circuit board on which the light source is mounted, a light shielding wall that defines a light emitting region of the light source by an opening, and an upper portion of the light shielding wall, A display board having a printed layer printed so as to define a first light-shielding region in the region;
A low reflection treatment layer is provided on the light source side surface of the display plate.

  According to the present invention, there is little difference in appearance between the light-shielding region and the light-emitting region even when the light source is turned off, and it is intended to provide a display device having a seamless feeling.

1 is a front view illustrating an appearance of a display device according to a first embodiment of the present disclosure. It is a figure which shows the principal part cross section of the display apparatus which concerns on 1st embodiment of this indication. It is a figure which shows the principal part cross section of the display apparatus which concerns on 2nd embodiment of this indication. It is a figure which shows the modification of the display apparatus which concerns on 2nd embodiment of this indication.

  Hereinafter, the display device according to the first embodiment of the present disclosure will be described with reference to the illustrated examples.

  FIG. 1 is a diagram showing a display example of the display device, and FIG.

  The display device according to the present disclosure displays desired information by emitting and displaying a predetermined shape by turning on / off illumination light from the inside. The first light shielding is viewed from the user (viewer). It is divided into a display area c including an area a1 and a light emitting area b. In addition, the display device includes a base 1, a light source 2, a light shielding wall 3, a display plate 4, a diffusion plate 5, and a front panel 6.

  For example, a printed circuit board in which a copper foil wiring pattern is printed on a plate-like glass epoxy material can be applied to the substrate 1, and a light source 2 is mounted on the front side. The device is also mounted on the base 1, and a circuit pattern for conducting the control device and the light source 2 is printed.

  The board 1 also includes a connector and signal wiring for inputting control information from outside the apparatus to the control apparatus.

  The control device includes a storage unit that stores programs, input data, calculation progress, calculation results, and the like, a calculation unit that performs predetermined calculation processing based on information stored in the storage unit, and an interface for connection to other devices Or a microcomputer provided with the above.

  In addition, the front surface of the substrate 1 is darkly painted with low reflection.

  The light source 2 is mounted on the front side of the board 1 and its blinking is controlled by a light emission control signal received from the above-described control device. The blinking control here refers to control of various light emission patterns such as adjustment of color temperature (color adjustment), adjustment of light quantity (light adjustment), lighting, extinction, and blinking.

  Although various light emitters can be applied to the light source 2, it is generally preferable to use a light emitting diode (LED).

  The light shielding wall 3 is in contact with the front surface of the base 1 and is shaped to provide an opening in the front direction of the light source 2 while surrounding the periphery of the light source 2 on the base 1. According to the above-described shape, the light beam emitted from the light source 2 is emitted only in the front direction of the device where the user of the display device is present, and the visibility is improved. In this case, the light shielding wall 3 is provided so as to be divided for each segment (light emission unit) that is turned on / off by the light source 2.

  The shading wall 3 is painted with a dark color and low reflection.

  The display board 4 is provided with a display substrate 4a, a low reflection treatment layer 4b, and a print layer 4c.

  The display substrate 4a is generally a plate-like light-transmitting synthetic resin material, and in this case, an acrylic material or the like is applied. The display substrate 4a has a light-transmitting colored portion, and is formed as a so-called smoke material containing a colored pigment in the present disclosure. Therefore, the display substrate 4a has a predetermined light transmittance, and this light transmittance is referred to as a first light transmittance.

  The low reflection treatment layer 4b is a member or surface processing for reducing the reflectance of light on the material surface. In this case, a sheet material having a moth-eye structure on the rear surface of the acrylic material ( Moss eye film) is affixed.

  The moth-eye film is used for reducing the light reflectance of the member surface, and the antiglare film and the antireflection film have the same purpose in terms of reducing the reflectance. In particular, the feature of the moth-eye film is that the uneven pattern is arranged on the surface at intervals of less than or equal to the visible light wavelength (for example, 400 nm or less) without any gaps, and the refractive index change at the boundary between the outside (air) and the member surface is simulated. It is in a place where light incident on the boundary is almost transmitted.

  The print layer 4c defines a first light shielding region a1 with a light shielding material. In this case, light is shielded by printing black ink on the surface of the low reflection treatment layer 4b.

  The diffusing plate 5 is provided so as to cover at least the opening direction of the light shielding wall 3. Of the light rays emitted from the light source 2, the diffusion plate 5 is not restricted (light-shielded) by the light shielding wall 3 or the base 1, and is directed to the front surface (emission direction). Is diffused to make the luminance uniform in one segment. In general, a light-transmitting synthetic resin material is suitable. In this case, white polycarbonate or the like is applied.

  The front panel 6 generally uses a light-transmitting synthetic resin material, and in this case, an acrylic material or the like is used. Further, the front panel 6 is a structure for the purpose of preventing damage to the display board 4 and is therefore provided in front of the display board 4 when viewed from the user.

  The front panel 6 has a light-transmitting colored portion, and is formed as a so-called smoke material containing a colored pigment in the present disclosure. Therefore, the front panel 6 has a predetermined light transmittance, and this light transmittance is referred to as a second light transmittance.

  The second light transmittance is equivalent to or different from the first light transmittance of the display base material 4a, but the first light transmittance of the display base material 4a is valid. A lower light rate is suitable for achieving the gist of the present invention.

  With the above structure, the display device displays desired information to the user by controlling the blinking of the light source 2 and the shape of the light emitting region b. In this case, it is possible to display vehicle information such as a numerical value such as a traveling speed or an accumulated traveling distance of the vehicle or a bar display indicating the remaining fuel amount.

  Hereinafter, how the above-described embodiment reduces the appearance difference between the light emitting region b and the first light shielding region a1 and realizes a seamless feeling will be described.

  First, the low reflection treatment layer 4b suppresses reflection at the boundary between the rear surface of the display substrate 4a and the air in the light emitting region b.

In the conventional display device not provided with the low reflection treatment layer 4b, the reflectance of the external light at the boundary between the rear surface of the display substrate and the air in the light emitting region is larger than the reflectance of the external light at the printing layer, and the light source is turned off. Occasionally, when the display area is illuminated by external light, the light emitting area appears brighter than the first light shielding area, and the seamless feeling is impaired. However, as described above, the reflection at the boundary between the rear surface of the display substrate 4a and the air in the light emitting region b is reduced by the low reflection treatment layer 4b, thereby reducing the appearance difference.
Therefore, for example, even when this display device is applied to an instrument used in an environment exposed to sunlight, such as a motorcycle, the display panel 4 has a sense of unity with no difference in appearance. Furthermore, it can be a display output with high discrimination of the on / off state.

  Secondly, the incident external light is reduced by the translucent colored portion of the display substrate 4a and the front panel 6 according to the embodiment of the present disclosure. If the translucent colored portion is omitted from the configuration of FIG. 2, the amount of external light incident on the display area c is multiplied by the difference between the reflectance in the light emitting area b and the reflectance in the first light shielding area a1. Accordingly, the user feels a difference in the appearance of the first light shielding area a1 and the light emitting area b.

  However, as shown in FIG. 2, by having a translucent colored portion, the external light incident on the printing layer 4c reaches only the amount of the original external light amount multiplied by the transmissivity of the translucent colored portion. The difference in the amount of reflected light felt by the user is also reduced, and the appearance difference has been reduced.

  Third, the base 1 and the light-shielding wall 3 are coated with dark and low reflection to reduce reflection of external light.

  When the light source is turned off, external light may enter the display device from the light emitting region b, and the internal structure of the display device may be visible to the user. As means for reducing this cause, the base 1 and the light-shielding wall 3 are coated with dark and low reflection so that the light reflected by the internal structure is suppressed even when external light is incident when the light source is turned off. So it has been reached to reduce the appearance difference.

  Fourth, the light-transmitting colored portion of the display substrate 4a out of the two light-transmitting colored portions included in the display device of the present disclosure is derived from the lower light transmittance.

  When two external lights reflected on the rear surface of the display substrate 4a in each of the first light-shielding region a1 and the light emitting region b, which are problems, exist between the display substrate 4a and the front panel 6, It is desirable that the difference in light quantity between the two external lights is also reduced.

  To further satisfy this viewpoint, if there is a difference between the first light transmittance and the second light transmittance, it is possible to satisfy the above viewpoint more by reducing the first light transmittance. .

  With the above operation, the display device according to the first embodiment of the present disclosure has achieved to reduce the difference in appearance between the first light-blocking region a1 and the light-emitting region b when the light source is turned off.

  Next, a display device according to a second embodiment of the present disclosure will be described with reference to an example illustrated.

  FIG. 3 is a cross-sectional view of a main part of the display device. In addition, about the component structure similar to the said embodiment, the same code | symbol is described and detailed description is abbreviate | omitted.

  In the second embodiment, in addition to the first light shielding area a1 and the light emitting area b, the second light shielding area a2 is also one of the components of the display area c.

  The second light shielding area a2 is an area defined by being shielded only by the light shielding wall 3 without being shielded by the printing layer 4c.

  The second light shielding area a2 can express a finer shape than the first light shielding area a1. The reason is that if a fine light-shielding region is realized by the first light-shielding region a1 by the print layer 4c, even if a slight error in the assembly position of the display plate 4 and the light-shielding wall 3 occurs, the outline of the print layer 4c is obtained. The light shielding wall 3 is exposed outside.

  However, by realizing a fine light-shielding region in the second light-shielding region a2 by the light-shielding wall 3, it is possible to bring the light emitting regions b closer to each other without considering the alignment error between the display panel 4 and the light-shielding wall 3. It is possible to achieve a fine shading expression.

  Therefore, for example, in the display device of FIG. 1, the partition between the segments of the bar graph is more preferably expressed by the second light shielding region a2 by the light shielding wall 3 than by the first light shielding region a1 by the printing layer 4c. It is.

  The difference in appearance between the light emitting area b and the second light shielding area a2 when the light source is turned off will be described.

  The printing layer 4c is not provided at the boundary between the two regions, and there is a light shielding wall 3 on the base plate 1 side of the diffusion plate 5 as a structural difference between the light emitting region b and the second light shielding region a2. There is only a difference in appearance.

  However, in actual use, by visually recognizing the structural difference on the base side of the diffusing plate 5 through the diffusing plate 5, the outer shape of the light shielding wall 3 looks blurry and the difference in the amount of light is remarkably small. .

  Therefore, also in the second embodiment in which the second light-shielding region a2 exists, a display device having a seamless feeling is realized.

  In addition, although it gave and demonstrated as an example in the structure of embodiment mentioned above, this invention is not limited to this, Various improvement in the range which does not deviate from the summary of this invention in other structures, and Of course, the display can be changed. For example, although it has been described that the control device is mounted on the base 1, a configuration in which the control device is provided outside the display device and the light emission of the light source 2 is directly controlled via the wiring pattern or connector of the base 1 may be used.

  Further, in the illustrated example, the diffusion plate 5 covers the front surface side surface of the light shielding wall 3, but it is only necessary to cover at least the opening formed by the light shielding wall 3, that is, the light emitting region b as shown in FIG.

  In addition, the cross section of the light shielding wall 3 is rectangular in the illustrated example, and is formed like a wall perpendicular to the base 1, but the cross sectional shape is not rectangular as shown in FIG. Also good.

  The present invention relates to a display device and is suitable as an instrument device mounted on a moving body such as an automobile, a motorcycle, and a ship.

a1 1st light-shielding area a2 2nd light-shielding area b Light-emitting area c Display area 1 Base 2 Light source 3 Light-shielding wall 4 Display board 4a Display substrate 4b Low reflection treatment layer 4c Print layer 5 Diffuser 6 Front panel

Claims (9)

A light source;
A circuit board on which the light source is mounted;
A light-shielding wall that restricts the direction of emission of light from the light source;
A dark color which is provided in the opening direction of the light shielding wall where the light from the light source is not limited by the light shielding wall, is subjected to low reflection processing on the light source side surface, and is printed so as to define a first light shielding area in a predetermined area A display board having a printed layer of
A display device comprising: The display device according to claim 1, further comprising a diffusion plate in an opening direction of the light shielding wall where light from the light source is not limited by the light shielding wall. The display device according to claim 1, wherein a dark color coating is applied to the light shielding wall. 4. The display device according to claim 1, wherein a dark color coating is applied to a surface of the circuit board on which the light source is mounted. 5. The display device according to claim 1, further comprising: a second light shielding region which is not shielded by the print layer and is shielded only by the light shielding wall, in addition to the first light shielding region. Display device. The display device according to claim 1, wherein the display plate has a translucent colored portion. The display device according to claim 1, wherein a front panel is provided in front of the display plate as viewed from a user. The display device according to claim 7, wherein the front panel has a translucent colored portion. The display device according to claim 8, which is dependent on claim 6, wherein the transmissivity of the translucent colored portion applied to the display plate among the translucent colored portions of the front panel and the display plate is smaller.