JP5445783B2 - Electronic device with light-emitting display - Google Patents

Description

  The present invention relates to various instrumentation electronic devices such as power transducers, signal converters or measurement control remote input / output devices according to the state of control and setting of the device main body around the transmitted light by the main display unit. The present invention relates to an electronic apparatus including a light emitting display unit that can display an indicator unit that emits light.

  Conventionally, for example, seven light emitting diodes (hereinafter referred to as LEDs) are arranged in a substrate shape, and a segment display main display capable of displaying specific shapes such as numbers and letters by selectively emitting light. A light guide plate is disposed opposite to the main display portion on the front side of the main display portion, and an LED for the light guide plate is arranged at the end of the extension portion of the light guide plate, so that the main display of a specific shape In addition, a configuration in which LED light emission for a light guide plate is overlapped is known (for example, see Patent Document 1).

  The prior art will be described with reference to an exploded perspective view of the conventional display device 100 shown in FIG.

  The display device 100 includes a resin-made non-transparent (for example, opaque) case 101, a main display unit 104 including a reflector 102 and a main display unit light emitting element group 103 from the rear side, a light guide plate 105, and a light guide plate. A surface light emitting unit 107 including the light emitting element pair 106 is accommodated with the respective light emitting surfaces facing forward, and a rectangular light emitting substrate 108 and a back cover 109 cover the rear side of the case 101.

  Further, the surface light emitting unit 107 includes a pair of light-transmitting single light guide plates 105 made of a resin such as acrylic, glass, or the like, and a pair of light emitting element groups 103 for the main display unit sandwiched from both sides along the arrangement direction. 6 pairs of light emitting element pairs 106 for light guide plates arranged in the form of.

  According to this configuration, the decorative light emission of the light emitting plate pair 106 for the light guide plate is added to the light emission of the light emitting element group 103 for the main display portion, and the decorativeness is improved accordingly, so that the entertainment can be further increased. there were.

  Another configuration similar to that configuration has also been known (see, for example, Patent Document 2).

  Furthermore, as another conventional example, a configuration using a light guide plate as a single indicator unit for displaying a control or setting state of a device main body in a control panel of a television receiver is known (for example, Patent Documents). 3), a configuration in which an indicator portion by reflection of a light guide plate is provided outside a dial in a display device for a vehicle is also known (see, for example, Patent Document 4).

Japanese Patent Laying-Open No. 2006-94893 (page 17, FIG. 5) JP 2004-325530 A JP-A-10-199314 JP 2005-91218 A

  However, in the configuration of the conventional display device, since the light emission for the light guide plate is superimposed on the light emission of the main display portion that displays a specific shape, the display of the main display portion and the light emission for the light guide plate are clearly separated. Therefore, it had the subject that it was difficult to visually recognize.

  That is, the indicator part which light-emits according to the control or setting state of the apparatus main body cannot be displayed on the peripheral part of the transmitted light by the main display part in the part visually recognized from the front side.

  As a result, the display device of the main display unit and the display device of the indicator unit need to be provided separately in the same housing, which greatly hinders the simplification of the light emitting display unit in the electronic device.

  Similarly, the configuration of the display device for the vehicle is a configuration in which the light emission for the light guide plate is superimposed on the light emission of the main display portion that displays a specific shape, so that the light emission for the light guide plate is also used for the light emission of the main display portion. Had an effect.

  Furthermore, since the outline of the light emitting area between one indicator part and the other indicator part adjacent to each other (the boundary between the bright part and the dark part, hereinafter the same) is not clear, it is more integrated or viewed obliquely Has a problem that both of the lights are mixed more remarkably, and the visibility is reduced accordingly.

  The present invention solves the above-described conventional problems, and displays an indicator portion that emits light according to the state of control and setting of the device main body on a peripheral portion of transmitted light by the main display portion in a portion visually recognized from the front side. However, since the display of the main display unit and the light emission for the light guide plate can be clearly separated and visually recognized, the indicator unit that emits light according to the state of control and setting of the device main body around the transmitted light by the main display unit An object of the present invention is to provide an electronic device including a light-emitting display portion with a simple configuration that can display the above.

  In order to solve the above-described conventional problems, an electronic apparatus having a light emitting display unit according to the present invention is disposed opposite to a main display unit that displays a specific shape by a first light source and a front side of the main display unit. A light guide plate and a second light source for causing the light guide plate to emit light from the rear side. The light guide plate approaches the flat light guide plate main body and the second light source for the light guide plate from the light guide plate main body. In a range that can be seen from the front side of the light guide plate main body portion, the orthogonal cross section at the connection portion between the light guide plate main body portion and the protrusion portion in the light guide direction. A concave portion is formed so as to surround the light emitting region projected on the surface of the light guide plate main body portion.

  According to this configuration, among the light guides that pass through the inside of the light guide plate main body part, the light guides not directed to the indicator part can be totally reflected and reach the indicator part. Can collect light.

  Thereby, even if the indicator portion that emits light according to the state of control or setting of the device main body is displayed on the single light guide plate in the peripheral portion of the transmitted light by the main display portion on the part visually recognized from the front side, The display of the main display part and the light emission for the indicator part can be clearly separated and visually recognized.

  That is, it is possible to reduce the influence of the light emission for the main display portion on the light emission for the indicator portion, and the outline of the light emission region between one indicator portion and the other indicator portion adjacent to each other is emphasized and clarified. The visibility can be improved without mixing both lights even when integrated or viewed from an oblique direction.

  More specifically, the side surface of the recess that is recessed in the vertical direction on the inner peripheral side can pass through the light guide plate main body and reflect the light guided to leak outside the indicator part to the inside of the indicator part. Therefore, it is possible to collect the light guide to the inner indicator part.

  In addition, the bottom surface of the recess reflects the light guide that extends through the inside of the light guide plate main body and the unwanted light guide that enters from the outside, and the side surface on the outer peripheral side of the recess emits light from the adjacent main display portion. Since the unnecessary light guide reflected and diffused inside the light guide plate can be reflected from the first light source for emitting light or the second light source for emitting light from the adjacent indicator part, the light is emitted before the recess. Therefore, the dark part can be easily formed in the concave part.

  As a result, the above-described effects can be obtained, and it is not necessary to separately provide the display device of the main display unit and the display device of the indicator unit in the same housing, and an electronic device including a light emitting display unit with a simple configuration is provided. Can be provided.

  In addition to the above-described configuration, the electronic device including the light emitting display unit according to the present invention has a light guide plate main body portion that is formed on the front side of the light guide plate main body portion in the light guide direction through the orthogonal cross-section at the connecting portion of the protruding portion. It is preferable that the light emitting region projected on the surface has a flat surface, and the concave portion is provided so as to be recessed in a direction perpendicular to the flat surface.

  According to this configuration, the flat surface can radiate the light incident on the projecting portion from the second light source without being diffused on the front surface of the light guide plate main body portion, and passes through the light guide plate main body portion by the recessed portion recessed in the vertical direction. Since the light guide that tries to leak to the outside of the indicator part can be reflected to the inside of the indicator part, the light guide can be collected on the indicator part inside the recess.

  As a result, the light emission of the main display part and the adjacent indicator part is reduced from affecting the light emission for the light guide plate, and the outline of the light emission area is also emphasized and clarified, so that it is more integrated or obliquely Even when viewed, the visibility can be improved without mixing both lights.

  In particular, when viewed from an oblique direction, the concave portion can be easily visually recognized by an operator, so that the light emitting portion and the non-light emitting portion can be clearly separated and visually recognized, so an indicator that emits light according to the state of control or setting The light emission state of the part can be easily confirmed by the operator.

  Further, in addition to the above configuration, the electronic device including the light emitting display unit of the present invention is configured such that the shape of the orthogonal cross section in the connecting portion of the protruding portion is a rectangle, and the recess formed on the front side of the light guide plate main body is It is preferable to have a racetrack shape that includes two semicircular portions and two parallel straight portions connecting the two semicircular portions when viewed from the front.

  According to this configuration, in addition to ensuring the amount of light guide at the protruding portion of the light guide plate and efficiently guiding light forward from the second light source, the semicircular portion of the concave portion of the light guide plate main body portion As a result, the reflection of external light can be reduced, so that the visibility can be further improved.

  In addition to the above configuration, the electronic device including the light emitting display unit according to the present invention preferably has a flat surface on the side facing the second light source.

  According to this configuration, parallel light emitted from the second light source can be easily selectively introduced into the light guide plate main body as a parallel light guide without being refracted at the tip of the protrusion. The amount of light leaking to the outside in the middle of deviating from the light guide direction can be reduced, and the amount of light reaching the light emitting region of the indicator unit can be increased accordingly.

  That is, the indicator part can be visually recognized more clearly.

  In addition to the above-described configuration, the electronic device including the light emitting display unit according to the present invention includes the first light source for the main display unit and the second light source for the light guide plate, in which the first light source for the main display unit is located inside. In addition, it is preferable that the second light source for the light guide plate is located on the outer side, and the light guide plate main body is in the form of a flat plate facing the common substrate.

  According to this configuration, since it is possible to control light emission and extinction in both the first light source and the second light source with a single substrate, the configuration can be further simplified.

  In addition to the above-described structure, an electronic apparatus including the light-emitting display portion of the present invention includes a housing made of a non-translucent material, and the light guide plate is formed to face the main display portion in the housing. Preferably, the light guide plate main body is positioned directly above the first opening, and the protruding portion is inserted and inserted into the second opening of the housing.

  According to this configuration, since the first opening and the second opening are separate openings, the light that passes through the first opening from the main display and the light guide plate is guided to the second opening. Interference with the light passing through the part is reduced, and the display of the main display part and the light emission for the indicator part can be clearly separated and visually recognized.

  In addition to the above-described configuration, the electronic device including the light-emitting display unit according to the present invention has a bulge that protrudes forward and contacts the light guide plate main body between the first opening and the second opening. It is preferable to have a part.

  According to this configuration, the raised portion that protrudes forward and contacts the light guide plate main body portion further enhances the light shielding effect, and is guided from the main display portion to the light passing through the first opening and the protruding portion of the light guide plate. Interference with light passing through the two openings is reduced, and the display on the main display and the light emission for the indicator can be clearly separated and visually recognized.

  In addition to the above configuration, the electronic device including the light-emitting display unit of the present invention includes a plurality of protrusions of the light guide plate arranged in a straight line on both sides of the light guide plate main body as viewed from the rear, It is preferable that there are four hook portions at positions corresponding to the vertices of the virtual rectangle, the virtual trapezoid or the virtual parallelogram, and the housing and the light guide plate are engaged via the hook portions.

  According to this configuration, not only the light guide plate can be easily coupled to the housing from the front side, but also the housing and the flat light guide plate body are coupled by providing the hook portions at the four protruding portions. Since the inclination of the light guide plate body with respect to the mounting plane of the first light source and the second light source disposed in the housing is reduced, the parallelism of both can be kept within a desired tolerance. .

  According to the electronic device including the light emitting display unit of the present invention, the simple configuration can display the indicator unit that emits light according to the state of control or setting of the device main body on the periphery of the transmitted light by the main display unit. An electronic device including a light-emitting display portion can be provided.

The whole perspective view seen from the front panel part side of electronic equipment in an embodiment of the invention (A) The front view of the electronic device in embodiment of this invention, (b) The partial front view which removed the light-guide plate of the electronic device in embodiment of this invention Front view of the indicator section and its vicinity Partial cross-sectional perspective view showing the structure of the protrusion of the indicator part AA sectional view of the indicator section and its vicinity The perspective view which shows the relationship between a front panel part and the light-guide plate before insertion. (A) Rear view of front panel after light guide plate is inserted, (b) Rear view of light guide plate (A) Front view showing BB cross-sectional position of electronic device, (b) BB cross-sectional view (A) The figure which shows the 1st modification of a recessed part and a light emission area, (b) The figure which shows the 2nd modification of a recessed part and a light emitting area, (c) The figure which shows the 3rd modification of a recessed part and a light emitting area. An exploded perspective view of a conventional display device

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  Here, FIG. 1 is an overall perspective view as seen from the front panel portion side of the electronic device in the embodiment of the present invention, and FIG. 2A is a front view of the electronic device in the embodiment of the present invention. 2B is a partial front view of the electronic apparatus according to the embodiment of the present invention with the light guide plate removed, FIG. 3 is a front view of the indicator portion and its vicinity, and FIG. 4 is a protrusion of the indicator portion. 5 is a partial cross-sectional perspective view showing the structure of FIG. 5, FIG. 5 is a cross-sectional view of the indicator section and its vicinity along A-A, and FIG. 6 is a perspective view showing the relationship between the front panel section and the light guide plate before insertion. 7 (a) is a rear view of the front panel portion after the light guide plate is inserted, FIG. 7 (b) is a rear view of the light guide plate, and FIG. 8 (a) is a BB cross-sectional position of the electronic device. 8B is a cross-sectional view taken along the line BB, and FIG. 9A is a diagram illustrating a first modification of the concave portion and the light emitting region, and FIG. ) Is a diagram showing a second modification of the recess and the light-emitting region, FIG. 9 (c) is a diagram showing a third modification of the recess and the light-emitting region.

  First, in FIG. 1, an electronic device 10 according to an embodiment of the present invention is a device used in the field of so-called industrial measurement. For example, voltage, current, active power, reactive power, apparent power, power factor, etc. Power multimeters and power transducers that enable measurement and display of measured values, signal converters that convert measurement signals from various sensors, display and output alarms, or detection terminals (measurements) Measurement that performs data communication between a temperature resistor, differential pressure transmitter, etc.) and a transmitter / receiver installed in a central control room (indicator, recorder, controller, PLC, DCS, computer, etc.) via a network It can be applied to various types such as remote input / output devices for control.

  In order to facilitate the following description, the width direction of the electronic device 10 is defined as the X direction, the depth direction is defined as the Y direction, and the height direction is defined as the Z direction, and the X direction, the Y direction, and the Z direction are defined as directions orthogonal to each other. To do.

  In this case, the extending direction of a rail-like structure (not shown) to which the electronic device 10 is attached coincides with the X direction.

  Usually, in a rail-like structure extending in the X direction, there are a large number of measurement objects, and therefore several tens or more of the same or similar electronic devices are adjacent to each other, and they may be closely attached. It is common.

  Here, the housing on the main body side of the electronic device 10 is divided into four so as to be stacked in the Y direction orthogonal to the X direction in which the rail-like structure extends, and from the front side, the front panel unit 11, It is composed of four housings, two intermediate housing portions 12 and a back panel portion 13.

  Two sliders 14 for mounting the electronic device 10 are disposed on the back side of the back panel unit 13 by sandwiching the rail-like structure.

  On the other hand, the front panel portion 11 is made of, for example, a plastic material or a metal material which is opaquely colored as a non-translucent material, and on the front side thereof, for example, an acrylic plastic, a polycarbonate (PC) resin, a cycloolefin-based material is used. A light guide plate 15 made of a material such as resin (COP) is disposed.

  The front panel unit 11 stores a main display unit 16 (see FIG. 2) that displays specific shapes such as numbers and characters on the rear side of the light guide plate 15, and the light guide plate 15 and the main display unit 16 are arranged to face each other. Yes.

  Next, a more detailed description will be given with reference to FIGS. 2 (a) and 2 (b).

  Here, the light guide plate 15 fitted into the front panel portion 11 has a flat light guide plate main body portion 15a having a spread in the XZ plane.

  The light guide plate 15 has a light guide plate main body portion 15a positioned directly above the first opening portion 11a formed to face the main display portion 16 on the front panel portion 11 made of a non-translucent material. The plurality of projecting portions 15c (see FIG. 4) of the optical plate 15 are fitted and inserted so as to pass through the corresponding second openings 11b.

  In the light guide plate main body 15a, a first light source 16a composed of seven LEDs is arranged on a substrate 18 (see FIG. 8B), and selectively emits light so that specific numbers such as numbers and letters are specified. The light of the segment display type main display unit 16 capable of displaying a figure is transmitted so that it can be seen from the front side.

  A plurality of indicator portions 15b are arranged on the upper and lower sides and the right side of the light guide plate main body portion 15a.

  Next, with reference to FIG. 3, the structure of the indicator part 15b and its vicinity seen from the front is demonstrated in detail.

  Here, in a range that can be seen from the front side of the light guide plate main body 15a, an orthogonal cross-section 16d (at right angles to the hanging direction of the protrusion 15c in the connection portion between the light guide plate main body 15a and the protrusion 15c (see FIG. 4)). 4) is projected onto the surface of the light guide plate body 15a in the light guide direction indicated by an arrow, and becomes a region indicated by a broken-line rectangle and a broken-line hatching.

  An indicator portion 15b having a flat surface is provided in the light emitting region 15e, and a recess 15f is formed so as to surround the light emitting region 15e when viewed from the front and to be recessed in a direction perpendicular to the flat surface.

  Further, as apparent from the shape of the light emitting region 15e that is projected on the surface of the light guide plate main body 15a in the light guide direction, the shape of the orthogonal cross section 15d at the connecting portion of the protruding portion 15c is the front. It is composed of rectangles as viewed from the top.

  And the recessed part 15f formed in the front side of the light-guide plate main-body part 15a is comprised from the side surface 151 of the inner peripheral side, the bottom face 152, and the side surface 153 of an outer peripheral side. It has a racetrack shape composed of two parallel straight portions that connect the semicircular portions.

  Here, in the present embodiment, it is sufficient that at least the racetrack-shaped recess 15f is formed so as to surround the light emitting region 15e, and includes an outer peripheral side surface 153, and the light emitting region 15e is located inside thereof. do it.

  More preferably, the positional relationship is set so that the light emitting region is located inside the center line indicated by the one-dot chain line of the bottom surface 152.

  Here, the center line indicated by the alternate long and short dash line has a racetrack shape, and in a parallel straight line portion, the center line is spaced at the same interval from both the inner peripheral side surface 151 and the outer peripheral side surface 153. The semicircular portion is a semicircle having a radius that forms a semicircle of the inner circumferential side surface 151 and a radius that is a median value of the radius that forms the semicircle of the outer circumferential side surface 153.

  Thereby, the amount of light guide in the protruding portion 15c of the light guide plate 15 can be secured, and the light can be efficiently guided forward from the second light source 17, and in addition, the half of the concave portion 15f of the light guide plate main body portion 15a. Since the reflection of external light onto the inner peripheral side surface 151 when viewed from the left and right sides can be reduced by the circular portion, the visibility can be further improved.

  Next, with reference to FIG. 4, the relationship between the indicator part 15b and the protrusion part 15c is demonstrated in detail.

  A second light source 17 of LED for causing the light guide plate 15 to emit light from the rear side is mounted on the substrate 18 (see FIG. 8B), and the second light guide plate 15 second light guide plate 15 is provided from the flat light guide plate main body portion 15a. The protrusion 15c is integrally formed so as to hang down in a direction approaching the light source 17.

  Here, the parallelogram shown in a checkered pattern indicates an orthogonal cross section 15d that is orthogonal to the light guide direction at the connection portion between the light guide plate main body 15a and the protrusion 15c.

  In this case, the light guide direction indicated by the arrow coincides with the hanging direction of the projecting portion 15c hanging from the flat light guide plate main body portion 15a having a spread in the XZ plane, and thus is the Y direction. I can do it.

  Therefore, the orthogonal cross section 15d orthogonal to the light guide direction which is the Y direction is a virtual cross section cut by the XZ plane.

  The light emitting region 15e of the light guide plate main body 15a is projected on the surface of the light guide plate main body 15a toward the light guide direction indicated by the arrow in a range that can be viewed from the front side of the light guide plate main body 15a. The indicator portion 15b described above is provided.

  On the other hand, as is apparent from this figure, the protruding portion 15 c has a flat surface 15 g (see FIG. 5) on the side facing the second light source 17.

  Next, the light guide effect of the flat surface 15g of the protrusion 15c will be described with reference to FIG.

  As described above, since the protrusion 15c has the flat surface 15g on the side facing the second light source 17, the parallel light emitted from the second light source 17 is refracted at the tip of the protrusion 15c. Therefore, it becomes easy to selectively enter the light guide plate main body 15a selectively as the parallel light guide A as it is.

  Therefore, it is possible to reduce the amount of light leaking to the outside of the protruding portion 15c in the middle of the light guide direction indicated by the arrow, and to increase the amount of light reaching the light emitting region 15e (see FIG. 3) of the indicator portion 15b.

  That is, the indicator part 15b can be visually recognized much more clearly.

  Similarly, with reference to FIG. 5, the light shielding effect of the concave portion 15 f formed on the front side of the light guide plate main body portion 15 a and configured by the inner peripheral side surface 151, the bottom surface 152, and the outer peripheral side surface 153 will be described.

  Here, in a range that can be visually recognized from the front side of the light guide plate main body 15a, an orthogonal cross section 15d at a connection portion between the light guide plate main body 15a and the protrusion 15c (see FIG. 4) is indicated by a broken line.

  That is, the region where the orthogonal cross section 15d is projected on the surface of the light guide plate body 15a in the light guide direction indicated by the arrow is the light emitting region 15e (see FIG. 3).

  An indicator portion 15b having a flat surface is provided in the light emitting region 15e, and a concave portion 15f is formed so as to surround the light emitting region 15e when viewed from the front and to be recessed in a direction perpendicular to the flat surface. .

  For example, when a typical acrylic material is used as the material of the light guide plate 15, the critical angle θ at which total reflection occurs with light traveling from the light guide plate 15 to the air is n1 as the refractive index of the light guide plate and n2 as the refractive index of the air. Is expressed by the following (Equation 1).

すなわち、アクリル素材の屈折率ｎ１が１．４９で、空気の屈折率ｎ２が１であることから（数１）によって、臨界角θは、４２．２°となる。

That is, since the refractive index n1 of the acrylic material is 1.49 and the refractive index n2 of the air is 1, (Equation 1), the critical angle θ is 42.2 °.

  Therefore, light having an incident angle exceeding the critical angle θ is totally reflected as indicated by arrows on each of the inner side surface 151, the bottom surface 152, and the outer side surface 153 of the recess 15f.

  First, of the light guide that passes through the light guide plate main body 15a from the projecting portion 15c by the side surface 151 on the inner peripheral side of the recess 15f, such as the light that has traveled straight from the projecting portion 15c, is guided to the indicator unit 15b described above. Since the light B can be totally reflected and reach the indicator portion 15b, the light guide B can be collected on the indicator portion 15b inside the recess 15f.

  Thereby, the indicator part 15b which light-emits according to the state of control or a setting of an apparatus main body is displayed on the single light-guide plate 15 in the periphery of the transmitted light by the main display part 16 in the part visually recognized from the front side. However, the display of the main display unit 16 and the light emission for the indicator unit 15b can be clearly separated and visually recognized.

  That is, the light emission for the main display unit 16 is less affected by the light emission for the indicator unit 15b, and the outline of the light emitting region between the one indicator unit 15b and the other indicator unit 15b adjacent to each other is also emphasized. Since it becomes clear, the visibility can be improved without mixing both lights even when they are more integrated or viewed from an oblique direction.

  More specifically, the inner peripheral side surface 151 that is recessed in the vertical direction on the inner peripheral side of the recess 15f passes through the light guide plate main body 15a, and guides the light guided to leak outside the indicator unit 15b to the indicator unit. Since the light can be reflected on the inner side of 15b, the light guide B can be collected on the inner indicator portion 15b.

  Further, the bottom surface 152 of the recess 15f reflects the light guide C that passes through the inside of the light guide plate main body 15a and spreads outside and the unnecessary light guide D that enters from the outside, and the side surface 153 on the outer peripheral side of the recess 15f is Unnecessary light guide E reflected and diffused inside the light guide plate 15 from the first light source 16a for emitting light from the adjacent main display portion 16 or the second light source 17 for emitting light from the adjacent indicator portion 15b. Since the light can be reflected, a dark portion can be easily formed in the recess 15f by reducing the amount of light emitted before the recess 15f.

  As a result, the outline of the light emitting region 15e is emphasized and clarified by the concave portion 15f, so that the visibility can be improved without mixing both lights even when the light emitting region 15e is integrated or viewed from an oblique direction.

  In addition, it is not necessary to separately provide the display device of the main display unit 16 and the display device of the indicator unit 15b in the same housing, and the electronic device 10 including the light emitting display unit having a simple configuration can be provided.

  Further, the first light source 16a for the main display unit 16 (see FIG. 2B) and the second light source 17 for the light guide plate 15 have the first light source 16a for the main display unit 16 located on the inner side and the outside thereof. The second light source 17 for the light guide plate 15 is positioned on the same substrate 18, and the light guide plate body 15 a has a flat plate shape facing the common substrate 18.

  As a result, the light emission and extinction control can be performed in both the first light source 16a and the second light source 17 by the single substrate 18, so that the configuration can be further simplified.

  Similarly, with reference to FIG. 5, the structure and effect of the flat surface of the indicator part 15b and the recessed part 15f are demonstrated.

  The light guide plate main body 15a has a flat surface in the light emitting region 15e projected on the surface of the light guide plate main body 15a toward the light guide direction on the front side of the orthogonal cross section 15d in the connecting portion of the protrusion 15c. A recess 15f is provided so as to be recessed in a direction perpendicular to the surface.

  As a result, light whose flat surface is incident on the protruding portion 15c from the second light source 17 can be radiated without being diffused on the front surface of the light guide plate main body portion 15a, and passes through the light guide plate main body portion 15a by the recessed portion 15f that is recessed in the vertical direction. And since the light guide B which is going to leak outside the indicator part 15b can be reflected inside the indicator part 15b, the light guide B can be collected on the indicator part 15b inside the recessed part 15f.

  Therefore, it is reduced that the light emission for the main display unit 16 affects the light emission for the indicator unit 15b, and the outline of the light emitting region between the one indicator unit 15b and the other indicator unit 15b adjacent to each other is also emphasized. Since it becomes clear, the visibility can be improved without mixing both lights even when they are more integrated or viewed from an oblique direction.

  In particular, when viewed obliquely, the inner peripheral side surface 151 of the recess 15f is easily visually recognized by the operator, so that the light emitting portion and the non-light emitting portion can be clearly separated and visually recognized. The light emission state of the indicator portion 15b that emits light according to the state can be easily confirmed by the operator.

  Next, with reference to FIG. 6, the relationship between the front panel part 11 and the light-guide plate 15 is demonstrated.

  As described above, the light guide plate 15 is fitted into the front panel portion 11 in the Y direction indicated by the dashed arrow.

  Here, on the upper and lower sides and the right side of the plate-shaped light guide plate main body portion 15a having a spread in the XZ plane, a plurality of indicator portions 15b arranged in a straight line are arranged, and a plurality of projecting portions 15c corresponding thereto. Is inserted and inserted into the second opening 11b of the front panel 11.

  After the insertion, the light guide plate main body 15a is positioned directly above the first opening 11a formed so that the main display portion 16 faces the front panel 11.

  According to this configuration, since the first opening portion 11a and the second opening portion 11b are separate opening portions, the light passing through the first opening portion 11a from the main display portion 16 and the protruding portion 15c of the light guide plate 15 Interference between the light guided and the light passing through the second opening portion 11b is reduced, and the display of the main display portion 16 and the light emission for the indicator portion 15b can be clearly separated and visually recognized.

  Further, the front panel portion 11 has a raised portion 11c protruding forward from between the first opening portion 11a and the second opening portion 11b, and is set so as to contact the light guide plate main body portion 15a after being inserted. ing.

  According to this configuration, the raised portion 11 c that protrudes forward and contacts the light guide plate main body 15 a further enhances the light shielding effect, and the light that passes through the first opening 11 a from the main display portion 16 and the protruding portion of the light guide plate 15. Interference with the light guided to 15c and passing through the second opening portion 11b is reduced, and the display of the main display portion 16 and the light emission for the indicator portion 15b can be clearly separated and visually recognized.

  Further, the protruding portion 15c of the light guide plate 15 has hook portions 15h at four positions at positions corresponding to the vertices of the virtual trapezoid when viewed from the rear, and the front panel portion 11 and the light guide plate 15 are interposed via the hook portions 15h. Are engaged.

  Next, with reference to FIG. 7A and FIG. 7B, the relationship between the light guide plate 15 after insertion and the front panel unit 11 will be described.

  In a state after the light guide plate 15 is fitted and inserted into the front panel portion 11, the hook portion 15h has a total of four locations on the back side so that the first opening 11a of the front panel portion 11 is sandwiched from above and below. The support portion 11d is formed in a T-shaped top surface portion of the support portion 11d.

  Further, the protruding portion 15c of the light guide plate 15 has hook portions 15h at four positions corresponding to the vertices of the virtual trapezoid indicated by broken lines when viewed from the rear, and the front panel portion 11 and the light guide plate 15 are interposed via the hook portions 15h. Are engaged.

  According to this configuration, the front panel 11 and the light guide plate 15 can be easily coupled by providing the hooks 15h at the four protrusions 15c.

  In addition, since the inclination of the light guide plate main body 15a with respect to the mounting plane of the first light source 16a and the second light source 17 disposed inside the front panel portion 11 becomes small, the parallelism of both can be kept within a desired tolerance. it can.

  In addition, although the protrusion part 15c of the light-guide plate 15 has the hook part 15h in four places corresponding to the vertex of the virtual trapezoid shown with the broken line seeing from the back, the vertex of a virtual rectangle or a virtual parallelogram other than that The same effect can be obtained even if hook portions are provided at four locations corresponding to the above.

  Next, the relationship among the light guide plate 15, the front panel unit 11, and the substrate 18 will be described with reference to FIGS. 8A and 8B.

  The board 18 is screwed to the front panel unit 11 on both sides in the vertical direction and positioned with respect to the front panel unit 11. As described above, the light guide plate main body unit 15 a is connected to the front panel unit 11 and the main display unit 16. Is inserted so that the light guide plate main body 15a is positioned directly above the first opening 11a.

  Further, the protrusions 15c corresponding to the respective indicator portions 15b are inserted into the second openings 11b of the front panel portion 11, and are fitted to the T-shaped top surface portion of the support portion 11d like the lower hook portion 15h. doing.

  Moreover, the front panel part 11 has the protruding part 11c which protruded to the front side between the 1st opening part 11a and the 2nd opening part 11b, and is contact | abutting to the light-guide plate main-body part 15a after insertion.

  On the other hand, the first light source 16a (see FIG. 2 (b)) for the main display unit 16 and the second light source 17 for the light guide plate 15 have the first light source 16a for the main display unit 16 located on the inner side and the outside thereof. The second light source 17 for the light guide plate 15 is disposed on the same substrate 18.

  According to this configuration, since it is possible to control light emission and extinction in both the first light source 16a and the second light source 17 by the single substrate 18, the configuration can be further simplified.

  Next, with reference to FIGS. 9A to 9C, modified examples of the recess 15f and the light emitting region 15e will be described.

  As shown in FIG. 9A, the concave portion 25f includes a perfect circular inner peripheral side surface 251, a bottom surface 252, and an elliptical outer peripheral side surface 253.

  In this case, since the inner region of the rectangle indicated by the broken line is set as the light emitting region 25e, the side surface 251 on the inner peripheral side of the recess 25f uniformly reflects the light guide inward in all directions, and the indicator The entire part 25b is caused to emit light.

  Further, since the concave portion 25f is formed so as to surround the light emitting region 25e, the light emitting region 25e is located inside the outer peripheral side surface 253, and the bottom surface sandwiched between the light emitting region 25e and the outer peripheral side surface 253. A dark portion is formed in the region 252.

  As shown in FIG. 9B, the side surface on the inner peripheral side is not formed, and the recess 35f includes a side surface 352 and a bottom surface 351 having a rounded square shape.

  In this case, a dark portion is formed in a region of the bottom surface 351 sandwiched between the light emitting region 35e and the side surface 352, and the side surface 352 has a light shielding effect.

  As shown in FIG. 9C, the recess 45f having the same shape as the recess 15f described above is composed of an inner peripheral side surface 451, a bottom surface 452, and an outer peripheral side surface 453.

  In this case, since the area inside the rectangle indicated by the broken line is set as the light emitting area 45e, the recess 45f is formed so as to surround the light emitting area 45e.

  Here, when compared with the above-described relationship between the recess 15f and the origin region 15e, the light emitting region 45e is located on the inner side of the inner peripheral side surface 451, and therefore, the light travels straight from the tip of the protruding portion (not shown). Thus, the dark portion can also be formed in the peripheral portion of the indicator portion 45b without reflecting the guided light to the side surface 451 on the inner peripheral side.

  The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. The technical scope disclosed in different embodiments, respectively. Modifications of the embodiment obtained by appropriately combining the means are also included in the technical scope of the present invention.

  An electronic device having a light emitting display unit according to the present invention is provided in a peripheral portion of transmitted light by a main display unit in various instrumentation electronic devices such as a power transducer, a signal converter, or a remote input / output device for measurement control. It is useful as an electronic device or the like provided with a light emitting display portion that can display an indicator portion that emits light in accordance with the state of control or setting of the device main body.

DESCRIPTION OF SYMBOLS 10 Electronic device 11 Front panel part 11a 1st opening part 11b 2nd opening part 11c Raised part 11d Support part 12 Intermediate housing part 13 Back panel part 14 Slider 15 Light guide plate 15a Light guide plate main-body part 15b Indicator part 15c Protrusion part 15d Orthogonal Cross section 15e Light emitting area 15f Recess 15g Flat surface 15h Hook part 151 Inner side face 152 Bottom face 153 Outer side face 16 Main display part 16a First light source 17 Second light source 18 Substrate 25b Indicator part 25e Light emitting area 25f Inside recess 251 Peripheral side 252 Bottom 253 Peripheral side 35e Light emitting area 35f Recess 351 Bottom 352 Side 45b Indicator 45e Light emitting area 45f Recess 451 Inner side 452 Bottom 453 Outer side

Claims (8)

A main display unit that displays a specific shape by the first light source, a light guide plate disposed opposite to the main display unit on the front side of the main display unit, and a second light source for causing the light guide plate to emit light from the rear side; With
The light guide plate includes a plate-shaped light guide plate main body portion and a projecting portion integrally formed so as to hang from the light guide plate main body portion in a direction approaching the second light source for the light guide plate. In a range that can be visually recognized from the front side of the optical plate main body portion, an orthogonal cross section at a connection portion between the light guide plate main body portion and the protruding portion surrounds a light emitting region projected on the surface of the light guide plate main body portion in the light guide direction. An electronic device provided with a light-emitting display portion characterized in that a recess is formed as described above. The light guide plate main body has a flat surface in a light emitting region projected on the surface of the light guide plate main body toward the light guide direction on the front side of the orthogonal cross section at the connecting portion of the protruding portion. The electronic device having a light emitting display unit according to claim 1, wherein the recess is provided so as to be recessed in a vertical direction. The shape of the orthogonal cross section at the connecting portion of the protruding portion is a rectangle, and the concave portion formed on the front side of the light guide plate main body portion includes two semicircular portions and two semicircular portions as viewed from the front. 3. The electronic apparatus having a light emitting display portion according to claim 1, wherein the electronic device has a racetrack shape including two parallel straight portions to be connected. 4. The electronic device having the light emitting display unit according to claim 1, wherein the projecting portion has a flat surface on a side facing the second light source. 5. The first light source for the main display unit and the second light source for the light guide plate are configured such that the first light source for the main display unit is located inside and the second light source for the light guide plate is located outside the first light source. 5. The light-emitting display unit according to claim 1, wherein the light-emitting plate body is disposed on the same substrate, and the light guide plate main body has a flat plate shape facing the common substrate. With electronic equipment. The light guide plate includes a housing made of a non-translucent material, and the light guide plate main body portion is positioned directly above the first opening formed to face the main display portion in the housing. The electronic device having the light emitting display unit according to any one of claims 1 to 5, wherein the protruding portion is inserted so as to pass through the second opening of the housing. The light emitting display unit according to claim 6, wherein the housing includes a raised portion that protrudes forward and contacts the light guide plate main body between the first opening and the second opening. With electronic equipment. A plurality of the projecting portions of the light guide plate are arranged in a straight line on both sides of the light guide plate main body when viewed from the rear, and are located at positions corresponding to vertices of a virtual rectangle, a virtual trapezoid, or a virtual parallelogram. 8. The electronic apparatus having a light emitting display portion according to claim 6, wherein the electronic device has a hook portion at four locations, and the housing and the light guide plate are engaged through the hook portion.

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