JP4626399B2 - Light emitting device - Google Patents

Description

  The present invention relates to a light emitting device used in electronic equipment such as a watch, a mobile phone, and a PDA (Personal Digital Assistant).

For example, in some wristwatches, a light emitting device is caused to emit light at an alarm time so as to notify the user of the alarm time. In such a light-emitting device, as described in Patent Document 1, a watch glass is attached to the upper part of a watch case, and a light-emitting element is disposed inside the watch case. There is a configuration in which a cover member having a diffusion function is provided on the lower side of the glass, the light of the light emitting element is diffused by the cover member, and the diffused light is diffused to the outside through the watch glass.
JP-A-6-162809

  However, in such a conventional light emitting device, since the cover member that diffuses the light from the light emitting element is provided on the lower side of the watch glass, when the light from the light emitting element is diffused and diffused by the cover member, Even if the diffused divergent light is irradiated toward almost the entire watch glass and the display part provided in the watch case can be illuminated by the light applied to the watch glass, the light is emitted at the alarm time. There is a problem that the cover member cannot diverge and concentrate outside the watch case, and therefore the alarm time cannot be triggered by light.

  The problem to be solved by the present invention is that the light emitted from the light emitting element can be concentrated from the light diffusing member to the outside of the device case and diverge without the light diffusing member having an influence on the display portion by the light. It is to provide a light emitting device.

In order to solve the above problems, the present invention includes the following components.
In addition, the reference numerals of the drawings attached to the respective elements described in the section of each embodiment described later are attached to the respective constituent elements together with parentheses.

  As shown in FIGS. 1 to 10, the invention described in claim 1 is provided with an apparatus case (watch case 1) having an opening (2) and the opening inside the apparatus case facing the opening. A display unit (9), a protective glass (watch glass 3) attached to the opening of the device case, a light emitting element (11) disposed below the protective glass, and an upper side of the protective glass And a light diffusing member (12, 21, 31, 41, 51, 61) having a diffusion function, part of which faces the light emitting element and the other part is located outside the protective glass. The light emitting device is characterized in that.

  The invention according to claim 2 has a configuration in which the lower surface of the light diffusing member (12) facing the light emitting element (11) is formed on the diffusing surface (13) as shown in FIGS. The light-emitting device according to claim 1.

  The invention according to claim 3 is characterized in that, as shown in FIG. 4, the light diffusing member (21) is provided with a diffusion plate (22) on the lower surface facing the light emitting element (11). The light emitting device according to claim 1.

  As shown in FIGS. 5 and 6, the light diffusing member (31) has a two-layer structure of an upper layer portion (32) and a lower layer portion (33), and the upper layer portion and 2. The light emitting device according to claim 1, wherein a surface overlapping with the lower layer portion is formed on a diffusion surface.

  In the invention according to claim 5, as shown in FIG. 7, the light diffusing member (41) has a two-layer structure of an upper layer portion (32) and a lower layer portion (33), and the upper layer portion and the lower layer portion. The light-emitting device according to claim 1, wherein a diffusion plate is provided between the light-emitting device and the light-emitting device.

  As shown in FIGS. 8 to 10, the light diffusing member (51, 61) has a diffusing surface on the lower surface of the lower layer part (33) facing the light emitting element (11). 6. The light-emitting device according to claim 4, wherein the light-emitting device has the structure formed in (52).

  According to the first aspect of the present invention, the light emitting element is disposed below the protective glass attached to the opening of the device case, and a part of the light emitting element is opposed to the light emitting element on the upper side of the protective glass. Since a light diffusing member having a diffusing function is disposed on the outside of the protective glass, the light emitted from the light emitting element passes through the protective glass of the part facing the light diffusing member and enters the light diffusing member. As the light is diffused by the diffusion function of the light diffusing member, a part of the light diffusing member is arranged on the upper side of the protective glass facing the light emitting element, and the other part of the light diffusing member is outside the protective glass. Even if it arrange | positions, light can permeate | transmit substantially the whole area of a light-diffusion member, and it can diverge | emit to the exterior of an apparatus case.

  That is, since the light emitted from the light emitting element is transmitted through only the portion of the protective glass facing the light emitting element and is incident on the light diffusing member, the light of the light emitting element is irradiated to the entire area of the protective glass as in the conventional example. In addition, since the light diffusing member is configured such that a part thereof is disposed on the upper side of the protective glass facing the light emitting element and the other part is disposed on the outer side of the protective glass, the light emitting element is displayed. Even if it is arranged close to the vicinity of the part, the divergence area of the light diffusing member can be increased, and the central part of the light diffusing member can be separated from the display part. For this reason, the light diffusing member can diverge the light emitted by the light emitting element from the light diffusing member to the outside of the device case without causing the light to affect the display unit. It can be brightly lit and alerted by light.

  According to the second aspect of the present invention, the light diffusing member has a configuration in which the lower surface facing the light emitting element is formed on the diffusing surface, so that the light emitted from the light emitting element is transmitted through the protective glass of the portion facing this. Then, when the light is incident on the light diffusing member, the incident light can be diffused toward the entire area of the light diffusing member by the diffusion surface formed on the lower surface of the light diffusing member. For this reason, even if a part of the light diffusing member is arranged on the upper side of the protective glass facing the light emitting element and the other part of the light diffusing member is arranged outside the protective glass, Light can be transmitted almost uniformly and diffused to the outside of the device case. Thus, as in the first aspect of the invention, the light diverging member is not affected by light on the display unit, and the light emitting element can be used. The emitted light can be concentrated and diffused from the light diffusing member to the outside of the device case.

  According to the third aspect of the present invention, the light diffusing member has a configuration in which the diffusing plate is provided on the lower surface facing the light emitting element, so that the light emitted from the light emitting element is transmitted through the protective glass of the portion facing the light emitting element. Then, when the light is incident on the light diffusing member, incident light can be diffused toward the entire area of the light diffusing member by the diffusion plate provided on the lower surface of the light diffusing member. For this reason, even if a part of the light diffusing member is arranged on the upper side of the protective glass facing the light emitting element and the other part of the light diffusing member is arranged outside the protective glass, Light can be transmitted almost uniformly and diffused to the outside of the device case. Thus, as in the first aspect of the present invention, the light diffusing member is not affected by light on the display unit, and the light emitting element can be used. The emitted light can be concentrated and diffused from the light diffusing member to the outside of the device case.

  According to the invention described in claim 4, the light diffusing member has a two-layer structure of the upper layer portion and the lower layer portion, and the surface where the upper layer portion and the lower layer portion overlap is formed on the diffusion surface, so that the light emitting element emits light. The transmitted light passes through the protective glass of the portion facing this and enters the lower layer portion of the light diffusing member, and when this incident light passes through the lower layer portion and enters the upper layer portion, the upper layer and the lower layer portion Incident light can be diffused toward the entire upper layer portion of the light diffusing member by the diffusion surface formed on the overlapping surface. For this reason, even if a part of the light diffusing member is disposed on the upper side of the protective glass facing the light emitting element, and the other part of the light diffusing member is disposed on the outer side of the protective glass, the upper layer portion in the light diffusing member The light can be diffused almost uniformly through the entire area and diffused to the outside of the device case, so that, similarly to the invention according to claim 1, the light divergence member does not affect the display portion by light, The light emitted from the light emitting element can be concentrated and diffused from the light diffusing member to the outside of the device case.

  According to the invention described in claim 5, the light diffusing member has a two-layer structure of the upper layer portion and the lower layer portion, and the light emitting element emits light by providing the diffusion plate between the upper layer portion and the lower layer portion. When light passes through the protective glass at the part facing it and enters the lower part of the light diffusing member, and when this incident light passes through the lower part and enters the upper part, it is between the upper part and the lower part. With the diffusion plate provided on the incident light, the incident light can be diffused toward the entire upper layer portion of the light diffusing member. For this reason, even if a part of the light diffusing member is disposed on the upper side of the protective glass facing the light emitting element, and the other part of the light diffusing member is disposed on the outer side of the protective glass, the upper layer portion in the light diffusing member The light can be diffused almost uniformly through the entire area and diffused to the outside of the device case, so that, similarly to the invention according to claim 1, the light divergence member does not affect the display portion by light, The light emitted from the light emitting element can be concentrated and diffused from the light diffusing member to the outside of the device case.

  According to the sixth aspect of the present invention, the light diffusing member has a configuration in which the lower surface of the lower layer facing the light emitting element is formed on the diffusion surface, so that the light emitted from the light emitting element When the light passes through the protective glass and enters the lower layer of the light diffusing member, the diffusion surface formed on the lower surface of the lower layer allows the incident light to diffuse toward the entire lower layer and is diffused. When the incident light enters the upper layer portion from the lower layer portion, the incident light is transmitted by the diffusion surface formed on the surface where the upper layer portion and the lower layer portion overlap, or by the diffusion plate provided between the upper layer portion and the lower layer portion. It can be further diffused toward the entire upper layer.

  Therefore, even if a part of the light diffusing member is disposed on the upper side of the protective glass facing the light emitting element, and the other part of the light diffusing member is disposed on the outer side of the protective glass, the lower layer portion of the light diffusing member The diffusion surface formed on the lower surface of the substrate and the diffusion surface formed on the surface where the upper layer portion and the lower layer portion overlap, or the diffusion plate provided between the upper layer portion and the lower layer portion, Since the light can be diffused, the light can be evenly transmitted to the entire area of the light diffusing member and radiated to the outside of the device case, compared to those of the inventions according to claims 2 to 5. As a result, the light diffusing member does not affect the display unit due to light, and the light emitted from the light emitting element is efficiently concentrated from the light diffusing member to the outside of the device case. And let it diverge.

(Embodiment 1)
A first embodiment in which the present invention is applied to a wristwatch will be described below with reference to FIGS.
1 is a front view showing a wristwatch of the present invention, FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is a view showing an optical path state of the light emitting device of FIG.
The wristwatch includes a wristwatch case 1 as shown in FIGS. As shown in FIG. 2, an opening 2 is provided in the upper part of the watch case 1, and a watch glass 3 is attached to the opening 2. Further, as shown in FIGS. 1 and 2, a bezel 4 is attached to the upper outer periphery of the watch case 1 by a plurality of decorative screws 4 a in a state where the upper surface of the outer peripheral edge of the watch glass 3 is covered.

  On the other hand, a watch module 5 is housed inside the watch case 1 as shown in FIG. 2, and a back cover 6 is attached to the lower surface of the watch case 1 via a waterproof ring 6a. In this case, the timepiece module 5 includes a housing 7 as shown in FIG. A dial 8 is provided on the upper portion of the housing 7 corresponding to the watch glass 3, and a display portion 9 is provided on the inside of the housing 7 corresponding to the opening 8 a of the dial 8. . The display unit 9 is a flat display device such as a liquid crystal display device or an EL (electroluminescence) display device, and is configured to display information such as time in an electro-optical manner.

  By the way, as shown in FIG. 1, the wristwatch case 1 is provided with a light emitting device 10 at about 5 o'clock. As shown in FIG. 2, the light emitting device 10 includes a light emitting element 11 disposed on the side of the display unit 9 on the lower side of the watch glass 3, a part thereof facing the light emitting element 11 and another part of the light emitting element 11. And a light diverging member 12 located outside the watch glass 3. The light emitting element 11 is formed of an LED (light emitting diode) or the like, and is provided at a position located on the side of the display unit 9 below the watch glass 3, that is, at the end of the dial plate 8, as shown in FIG. It arrange | positions in the accommodation recessed part 8b, and is electrically connected to the circuit board (not shown) in the timepiece module 5. FIG.

  As shown in FIGS. 1 and 2, the light diffusing member 12 is made of transparent or translucent glass or synthetic resin, and is formed in a substantially disc shape as a whole, and is fitted into a storage hole 14 provided in the bezel 4. Therefore, a part of the inner peripheral side is arranged on the upper surface of the watch glass 3 facing the light emitting element 11, and a part of the outer peripheral side is located on the outer side of the watch glass 3 and arranged on the upper surface of the watch case 1. It is comprised so that. The light diffusing member 12 has a diffusing function, and has a configuration in which a lower surface of a portion facing the light emitting element 11 is formed on the diffusing surface 13.

  As shown in FIGS. 2 and 3, the diffusing surface 13 is formed in a corrugated uneven shape, and when the light from the light emitting element 11 passes through the watch glass 3 and enters the light diffusing member 12, the light divergence is performed. It is configured to diffuse toward the entire area of the member 12. That is, the corrugated uneven surface of the diffusing surface 13 is such that the inclined surface facing the center side of the watch glass 3 has a gentle slope and the inclined surface facing the outer peripheral side of the watch glass 3 has a steep slope. The light from the light emitting element 11 is refracted toward the outer peripheral side of the watch glass 3 by the gently inclined inclined surface. In addition, as shown in FIGS. 1-3, the uneven | corrugated | grooved part 15 for a decoration is formed in the upper surface of this light-diffusion member 12 by decorative patterns, such as a checkered pattern.

  According to such a light emitting device 10 for a wristwatch, the light emitting element 11 is arranged on the side of the display unit 9 below the watch glass 3 attached to the opening 2 of the watch case 1, and the watch glass 3. A light diffusing member 12 having a part on the inner peripheral side facing the light emitting element 11 and a part on the outer peripheral side positioned on the outside of the watch glass 3 is disposed on the upper side of the light emitting element 11. Since the lower surface of the member 12 is formed on the diffusing surface 13, when the light emitted from the light emitting element 11 passes through the portion of the watch glass 3 facing this and enters the light diverging member 12, as shown in FIG. 3. The incident light can be diffused toward the entire area of the light diffusing member 12 by the diffusion surface 13 formed on the lower surface of the light diffusing member 12.

  For this reason, the light diverging member 12 has a part on the inner peripheral side thereof arranged on the upper side of the watch glass 3 facing the light emitting element 11 and a part on the outer peripheral part side arranged on the outer side of the watch glass 3. Even in the configuration, the light from the light-emitting element 11 is diffused by the diffusion surface 13 formed on the lower surface of the light-diffusing member 12 facing the light-emitting element 11, so that the light is almost uniformly distributed throughout the light-diffusing member 12. And can be diffused to the outside of the watch case 1. At this time, the light can also be diffused by the decorative uneven portion 15 formed on the upper surface of the light diffusing member 12. Thereby, the light emitted from the light emitting element 11 can be concentrated from the light diverging member 12 to the outside of the wristwatch case 1 to be diverged.

  In this case, since the light emitted from the light emitting element 11 is transmitted through only the portion of the watch glass 3 facing the light emitting element 11 and enters the light diffusing member 12, the light from the light emitting element 11 is incident on the watch glass 3 as in the conventional example. There is no irradiation towards the whole. The light diverging member 12 has a configuration in which a part on the inner peripheral side thereof is located on the upper side of the watch glass 3 facing the light emitting element 11 and a part on the outer peripheral side is located on the outer side of the watch glass 3. Therefore, even if the light emitting element 11 is arranged close to the display unit 9, the divergence area of the light diffusing member 12 can be increased, and the central portion of the light diffusing member 12 is separated from the display unit 9 as much as possible. be able to. For this reason, the light diffusing member 12 can concentrate the light emitted from the light emitting element 11 on the outside of the wristwatch case 1 and diverge the light without affecting the display unit 9 by light. Thus, the light diffusing member 12 can be caused to emit light brightly, and attention such as an alarm time can be alerted by light.

(Embodiment 2)
Next, a second embodiment in which the present invention is applied to a wristwatch will be described with reference to FIG. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS. 1-3.
The light emitting device 20 of the wrist watch has a configuration in which a diffusion plate 22 is provided on the lower surface of the light diffusing member 21, and the other configuration is the same as that of the first embodiment. Also in this case, the light emitting element 11 is arranged in a state of being positioned on the side of the display unit 9 below the watch glass 3 attached to the opening 2 of the watch case 1 as in the first embodiment.

  As in the first embodiment, the light diffusing member 21 is made of transparent or translucent glass or synthetic resin, and is formed in a substantially disc shape as a whole. The light diffusing member 21 is fitted into the storage hole 14 provided in the bezel 4 to The case 1 is arranged around 5 o'clock. In addition, as shown in FIG. 4, the light diverging member 21 is also disposed on the upper surface of the watch glass 3 facing the light emitting element 11 and a part on the outer periphery side of the watch glass 3. It is the structure arrange | positioned in the upper surface of the wristwatch case 1 located in the outer side.

  A diffusion plate 22 provided on the lower surface of the light diffusing member 21 is disposed so as to face the light emitting element 11 as shown in FIG. 4, and light from the light emitting element 11 is transmitted through the watch glass 3 and incident. In this case, the incident light is configured to diffuse toward the entire area of the light diffusing member 21. Note that, similarly to the first embodiment, the uneven portion 15 for decoration is also formed on the upper surface of the light diffusing member 21 with a decorative pattern such as a checkered pattern.

  According to the light emitting device 20 of such a wristwatch, the light emitting element 11 is disposed on the side of the display unit 9 below the watch glass 3 attached to the opening 2 of the watch case 1, and the watch glass 3. A light diverging member 21 having a part on the inner peripheral side facing the light emitting element 11 and a part on the outer peripheral side located outside the watch glass 3 is disposed on the upper side of the light emitting element 11. Since the diffusing plate 22 is provided on the lower surface of the member 21, the lower surface of the light diffusing member 21 is obtained when the light emitted from the light emitting element 11 passes through the portion of the watch glass 3 facing the light emitting element 11 and enters the light diffusing member 21. Incident light can be diffused toward the entire area of the light diffusing member 21 by the diffusing plate 22 provided at.

  For this reason, as in the first embodiment, the light diverging member 21 has a part on the inner peripheral side thereof arranged on the upper side of the watch glass 3 facing the light emitting element 11 and a part on the outer peripheral part side of the watch glass 3. Even if it is the structure arrange | positioned on the outer side of this, by diffusing the light from the light emitting element 11 with the diffuser plate 22 provided in the lower surface of the light diverging member 21 facing the light emitting element 11, of the light diverging member 21 is provided. Light can be transmitted almost uniformly over the entire area and diffused outside the watch case 1. Thereby, the light emitted from the light emitting element 11 can be concentrated from the light diverging member 21 to the outside of the wristwatch case 1 to be diverged.

  Also in this case, the light emitted from the light emitting element 11 is transmitted through only the portion of the watch glass 3 facing it and enters the light diverging member 21, so that the light from the light emitting element 11 is watch glass as in the conventional example. 3 is not irradiated to almost the whole. The light diverging member 21 is configured such that a part of the inner peripheral side thereof is located above the watch glass 3 facing the light emitting element 11 and a part of the outer peripheral side is located outside the watch glass 3. Therefore, even if the light-emitting element 11 is arranged close to the display unit 9, the divergence area of the light diffusing member 21 can be increased, and the central part of the light diffusing member 21 is separated from the display unit 9 as much as possible. be able to.

  For this reason, also in this light emitting device 20, as in the first embodiment, the light diffusing member 21 does not affect the display unit 9 by light, and the light emitted from the light emitting element 11 is transmitted from the light diffusing member 21 to the watch case. It is possible to diverge by concentrating on the outside of 1, thereby causing the light divergence member 21 to emit light brightly and to alert attention such as alarm time by light.

  In the first embodiment, the lower surface of the light diffusing member 12 is formed on the diffusing surface 13, and in the second embodiment, the diffusing plate 22 is provided on the lower surface of the light diffusing member 21. As described above, the present invention is not limited thereto, and a diffusing agent is mixed in the light diffusing members 12 and 21, and the light from the light emitting element 11 is diffused in the light diffusing members 12 and 21 by the mixed diffusing agent. You may do it.

(Embodiment 3)
Next, a third embodiment in which the present invention is applied to a wristwatch will be described with reference to FIGS. Also in this case, the same portions as those in the first embodiment shown in FIGS.
The light emitting device 30 of the wristwatch has a configuration in which the light diffusing member 31 has a two-layer structure of an upper layer portion 32 and a lower layer portion 33 and an overlapping surface of the upper layer portion 32 and the lower layer portion 33 is formed on the diffusion surface 34. Except for this, the configuration is substantially the same as in the first embodiment. Also in this case, the light emitting element 11 is arranged in a state of being located on the side of the display unit 9 below the watch glass 3 attached to the opening 2 of the watch case 1 as in the first embodiment.

  As in the first embodiment, the light diverging member 31 is generally formed in a disc shape, is fitted into the storage hole 14 provided in the bezel 4, and is disposed at about 5 o'clock of the watch case 1. . As shown in FIGS. 5 and 6, the light diffusing member 31 is also disposed on the upper surface of the watch glass 3 facing the light emitting element 11 and a part on the outer periphery side of the watch glass 3. Is arranged on the upper surface of the wristwatch case 1. Further, the upper layer portion 32 and the lower layer portion 33 of the light diffusing member 31 are made of transparent or translucent glass or synthetic resin, respectively, and the overlapping surface of the upper layer portion 32 and the lower layer portion 33 is formed on the diffusion surface 34. Yes.

  Similar to the diffusion surface 13 of the first embodiment, each of the diffusion surfaces 34 is formed in a corrugated uneven shape, and light from the light emitting element 11 passes through the watch glass 3 and enters the lower layer portion 33 of the light diffusing member 31. When the incident light passes through the lower layer portion 33 and enters the upper layer portion 32, the incident light is diffused toward the entire area of the upper layer portion 32. That is, the corrugated uneven surface of the diffusing surface 34 also has a gradual slope toward the center side of the watch glass 3 and a steep slope toward the outer periphery of the watch glass 3, and these continue in a wavy shape. The light from the light emitting element 11 is refracted toward the outer peripheral side of the watch glass 3 by the gently inclined inclined surface. In addition, it is desirable that an uneven portion for decoration (not shown) is formed on the upper surface of the upper layer portion 32 of the light diffusing member 31 as in the first embodiment.

  According to such a light emitting device 30 for a wristwatch, the light emitting element 11 is disposed on the side of the display portion 9 below the watch glass 3 attached to the opening 2 of the watch case 1, and the watch glass 3 A light diffusing member 31 having a part on the inner peripheral side facing the light emitting element 11 and a part on the outer peripheral side located on the outside of the watch glass 3 is disposed on the upper side of the light diffusing member 31. 32 and the lower layer portion 33, and the diffusion surface 34 is formed on the overlapping surface of the upper layer 32 and the lower layer portion 33. Therefore, the watch glass in the portion where the light emitted from the light emitting element 11 faces this 3 is incident on the lower layer portion 33 of the light diffusing member 31, and when the incident light passes through the lower layer portion 33 and enters the upper layer portion 32, it is formed on the surface where the upper layer 32 and the lower layer portion 33 overlap. The incident light is diverted by the diffused surface 34 thus formed. It can be diffused toward the entire region of the upper portion 32 of the.

  For this reason, the light diverging member 31 has a part on the inner peripheral side thereof arranged on the upper side of the watch glass 3 facing the light emitting element 11 and a part on the outer peripheral part side arranged on the outer side of the watch glass 3. Even in the configuration, the light from the light emitting element 11 is diffused by the diffusion surface 34 formed on the overlapping surface of the upper layer 32 and the lower layer portion 33, so that the light is spread over the entire upper layer portion 32 of the light diffusing member 31. Can be diffused almost uniformly to the outside of the watch case 1. Thereby, the light emitted from the light emitting element 11 can be concentrated and diffused from the upper layer portion 32 of the light diverging member 31 to the outside of the watch case 1.

  Also in this case, the light emitted from the light emitting element 11 is transmitted only through the portion of the watch glass 3 facing the light transmitting element 11 and is incident on the lower layer portion 33 of the light diffusing member 31. Light is not irradiated toward the entire watch glass 3. The light diverging member 31 has a configuration in which a part on the inner peripheral side is located above the watch glass 3 facing the light emitting element 11 and a part on the outer peripheral side is located outside the watch glass 3. Therefore, even if the light emitting element 11 is arranged close to the display unit 9, the divergence area of the light diffusing member 31 can be increased, and the central part of the light diffusing member 31 is separated from the display unit 9 as much as possible. Can do.

  For this reason, also in this light emitting device 30, as in the first embodiment, the light diffusing member 31 does not affect the display unit 9 by light, and the light emitted from the light emitting element 11 is transmitted from the light diffusing member 31 to the watch case. It is possible to diverge by concentrating on the outside of 1, thereby causing the light divergence member 31 to emit light brightly and to alert attention such as an alarm time by light.

(Embodiment 4)
Next, a fourth embodiment in which the present invention is applied to a wristwatch will be described with reference to FIG. In this case, the same reference numerals are given to the same portions as those in the third embodiment shown in FIGS.
The light emitting device 40 of this wristwatch has a structure in which a light diffusing member 41 has a two-layer structure of an upper layer portion 32 and a lower layer portion 33 and a diffusion plate 42 is provided between the upper layer portion 32 and the lower layer portion 33. Other than that, the configuration is the same as that of the third embodiment. Also in this case, the light emitting element 11 is arranged in a state of being positioned on the side of the display unit 9 below the watch glass 3 attached to the opening 2 of the watch case 1 as in the third embodiment.

  As in the third embodiment, the light diffusing member 41 is formed in a substantially disc shape as a whole, is fitted in the storage hole 14 provided in the bezel 4, and is disposed at about 5 o'clock of the watch case 1. . In addition, as shown in FIG. 7, the light diffusing member 41 also has a part on the inner peripheral side thereof arranged on the upper surface of the watch glass 3 facing the light emitting element 11, and a part on the outer peripheral part side. It is the structure arrange | positioned in the upper surface of the wristwatch case 1 located in the outer side.

  Further, the light diffusing member 41 has a two-layer structure of an upper layer portion 32 and a lower layer portion 33, as in the third embodiment, and has a configuration in which a diffusion plate 42 is disposed between the upper layer portion 32 and the lower layer portion 33. ing. When the light from the light emitting element 11 sequentially passes through the lower glass portion 33 and the lower layer portion 33 of the light diffusing member 41 and enters the upper layer portion 32, the diffusion plate 42 transmits the incident light to the upper layer portion of the light diffusing member 41. 32 is configured to diffuse toward the entire area. It should be noted that, similarly to the first embodiment, a decorative uneven portion (not shown) is preferably formed on the upper surface of the upper layer portion 32 of the light diffusing member 41.

  According to such a light emitting device 40 for a wristwatch, the light emitting element 11 is disposed on the side of the display portion 9 below the watch glass 3 attached to the opening 2 of the watch case 1, and the watch glass 3 A light diffusing member 41 in which a part on the inner peripheral side faces the light emitting element 11 and a part on the outer peripheral side is located outside the watch glass 3 is disposed on the upper side of the light diffusing member 41. 32 and the lower layer portion 33 are provided with a diffusion plate 42, so that the light emitted from the light emitting element 11 passes through the portion of the watch glass 3 facing the light emitting element 11 and enters the lower layer portion 33 of the light diffusing member 41, When the incident light passes through the lower layer portion 33 and enters the upper layer portion 32, the incident light is radiated by the diffusion plate 42 provided between the upper layer 32 and the lower layer portion 33. It can be diffused toward the whole area.

  For this reason, the light diverging member 41 has a part on the inner peripheral side thereof disposed on the upper side of the watch glass 3 facing the light emitting element 11 and a part on the outer peripheral part side disposed on the outer side of the watch glass 3. Even in the configuration, the light from the light emitting element 11 is diffused by the diffusion plate 42 provided between the upper layer 32 and the lower layer portion 33 of the light diffusing member 41, so that the light is spread over the entire upper layer portion 32. It can be transmitted almost uniformly and radiate outside the watch case 1. Thereby, similarly to Embodiment 3, the light emitted from the light emitting element 11 can be concentrated and diffused from the light diverging member 41 to the outside of the watch case 1.

  Also in this case, the light emitted from the light emitting element 11 is transmitted only through the portion of the watch glass 3 facing the light emitting element 11 and is incident on the lower layer 33 of the light diffusing member 41. Light is not irradiated toward the entire watch glass 3. The light diverging member 41 is configured such that a part of the inner peripheral side thereof is located on the upper side of the watch glass 3 facing the light emitting element 11 and a part of the outer peripheral side is located on the outer side of the watch glass 3. Therefore, even if the light emitting element 11 is arranged close to the display unit 9, the divergence area of the light diffusing member 41 can be increased, and the central part of the light diffusing member 41 is separated from the display unit 9 as much as possible. Can do.

  For this reason, also in this light emitting device 40, as in the third embodiment, the light diffusing member 41 does not affect the display unit 9 by light, and the light emitted from the light emitting element 11 is transmitted from the light diffusing member 41 to the watch case. It is possible to diverge by concentrating on the outside of 1, thereby causing the light diffusing member 41 to emit light brightly, and to alert attention such as an alarm time by light.

  In the third embodiment, the light diffusing member 31 has a configuration in which the surface where the upper layer portion 32 and the lower layer portion 33 overlap is formed on the diffusion surface 34. In the fourth embodiment, the light diffusing member 41 is the upper layer portion 32. Although the case where the diffusion plate 42 is provided between the lower layer portion 33 and the lower layer portion 33 has been described, the present invention is not limited thereto, and at least the upper layer portion 32 of the upper layer portion 32 and the lower layer portion 33 is mixed with a diffusing agent. The light from the light emitting element 11 may be diffused in the upper layer portion 32 by the mixed diffusing agent.

(Embodiment 5)
Next, a fifth embodiment in which the present invention is applied to a wristwatch will be described with reference to FIGS. Also in this case, the same parts as those in the third embodiment shown in FIGS.
In the light emitting device 50 of the wristwatch, the light diffusing member 51 has a two-layer structure of an upper layer portion 32 and a lower layer portion 33, and an overlapping surface of the upper layer portion 32 and the lower layer portion 33 is formed on the diffusion surface 34. 11, the lower surface of the lower layer portion 33 facing the surface 11 is formed on the diffusion surface 52.

  Also in this case, the light emitting element 11 is arranged in a state of being positioned on the side of the display unit 9 below the watch glass 3 attached to the opening 2 of the watch case 1 as in the third embodiment. Further, as in the third embodiment, the light diffusing member 51 is formed in a substantially disk shape, is fitted in the storage hole 14 provided in the bezel 4, and is disposed at about 5 o'clock of the watch case 1. ing. As shown in FIGS. 8 and 9, the light diffusing member 51 is also disposed on the upper surface of the watch glass 3 facing the light emitting element 11 at a part on the inner peripheral side and part on the outer peripheral side. It is the structure arrange | positioned in the upper surface of the wristwatch case 1 located in the outer side.

  Further, the light diffusing member 51 has a two-layer structure of an upper layer portion 32 and a lower layer portion 33, and the upper layer portion 32 and the lower layer portion 33 are made of transparent or translucent glass or synthetic resin, respectively. In addition to the overlapping surface of 32 and the lower layer portion 33 being formed on the diffusion surface 34, the lower surface of the lower layer surface 33 facing the light emitting element 11 is formed on the diffusion surface 52. In this case, the diffusion surface 34 formed on the overlapping surface of the upper layer portion 32 and the lower layer portion 33 has the same configuration as that of the third embodiment.

  Further, the diffusion surface 52 formed on the lower surface of the lower layer surface 33 is formed in a corrugated uneven shape as shown in FIGS. 8 and 9, and the light from the light emitting element 11 is transmitted through the watch glass 3 and the lower layer portion is formed. It is configured to diffuse toward the entire region of the lower layer portion 33 when entering the region 33. That is, the corrugated uneven surface of the diffusing surface 52 also has a gentle slope toward the center of the watch glass 3 and a steep slope towards the outer periphery of the watch glass 3 as in the first embodiment. These are continuously formed in a wave shape, and the light from the light emitting element 11 is refracted toward the outer peripheral side of the watch glass 3 by the inclined surface having a gentle inclination. In addition, it is desirable that an uneven portion for decoration (not shown) is formed on the upper surface of the upper layer portion 32 of the light diffusing member 51 as in the first embodiment.

  According to such a light emitting device 50 for a wristwatch, the light emitting element 11 is arranged on the side of the display unit 9 below the watch glass 3, and a part of the inner peripheral side is above the watch glass 3. 11 and a part of the outer peripheral side located on the outside of the watch glass 3 is disposed, and a surface where the upper layer 32 and the lower layer part 33 of the light diffusing member 51 overlap is defined as a diffusing surface 34. In addition, since the lower surface of the lower layer portion 33 facing the light emitting element 11 is formed on the diffusion surface 52, the light emitted from the light emitting element 11 is transmitted through the portion of the watch glass 3 facing the light emitting element 11, and the light diffusing member 51 When entering the lower layer portion 33, incident light can be diffused toward the entire area of the lower layer portion 33 by the diffusion surface 52 formed on the lower surface of the lower layer portion 33, and the diffused light can be diffused from the lower layer portion 33 to the upper layer. When entering the portion 32, the upper layer 3 And the diffusion surface 34 formed on the surface overlap between the lower portion 33, can be further diffused toward the incident light to the entire region of the upper portion 32 of the light diverting member 51.

  For this reason, the light diverging member 51 has a part on the inner peripheral side thereof disposed on the upper side of the watch glass 3 facing the light emitting element 11 and a part on the outer peripheral part side disposed on the outer side of the watch glass 3. Even if it is a structure, it is light emission by both the diffusion surface 52 formed in the lower surface of the lower layer part 33 facing the light emitting element 11, and the diffusion surface 34 formed in the surface where the upper layer 32 and the lower layer part 33 overlap. By diffusing the light from the element 11, the light is uniformly transmitted through the entire area of the light diffusing member 51, that is, both the lower layer portion 33 and the upper layer portion 32, compared with the third and fourth embodiments. It can be diverged outside the case 1. Thereby, the light emitted from the light emitting element 11 can be efficiently concentrated from the light diverging member 51 to the outside of the watch case 1 to be diverged.

  Also in this case, the light emitted from the light emitting element 11 is transmitted only through the portion of the watch glass 3 facing the light transmitting element 11 and enters the lower layer 33 of the light diffusing member 51. Light is not irradiated toward the entire watch glass 3. The light diverging member 51 is configured such that a part of the inner peripheral side thereof is located above the watch glass 3 facing the light emitting element 11 and a part of the outer peripheral side is located outside the watch glass 3. Therefore, even if the light emitting element 11 is arranged close to the display unit 9, the divergence area of the light diffusing member 51 can be increased, and the central part of the light diffusing member 51 is separated from the display unit 9 as much as possible. Can do.

  For this reason, also in this light emitting device 50, the light diffusing member 51 does not affect the display unit 9 due to light, and the diffusion surface 52 formed on the lower surface of the lower layer 33 facing the light emitting element 11 and the upper part The light emitted from the light emitting element 11 can be efficiently concentrated from the light diffusing member 51 to the outside of the watch case 1 and radiated by both of the diffusion surface 34 formed on the surface where the layer 32 and the lower layer portion 33 overlap. In this way, the light diverging member 51 can be made to emit light more brightly, and attention such as alarm time can be alerted by light.

(Embodiment 6)
Next, a sixth embodiment in which the present invention is applied to a wristwatch will be described with reference to FIG. In this case, the same parts as those in the fifth embodiment shown in FIGS.
In the wristwatch light-emitting device 60, the light diffusing member 61 has a two-layer structure of an upper layer portion 32 and a lower layer portion 33, and a diffusion plate 62 is provided between the upper layer portion 32 and the lower layer portion 33. The lower surface of the opposing lower layer portion 33 is formed on the diffusion surface 52, and the other configurations are substantially the same as those of the fifth embodiment.

  Also in this case, the light emitting element 11 is arranged in a state of being positioned on the side of the display unit 9 below the watch glass 3 attached to the opening 2 of the watch case 1 as in the fifth embodiment. Further, as in the fifth embodiment, the light diffusing member 61 is formed in a substantially disc shape as a whole, and is fitted in the storage hole 14 provided in the bezel 4, and is disposed at about 5 o'clock of the watch case 1. ing. As shown in FIG. 10, the light diverging member 61 is also arranged on the upper surface of the watch glass 3 facing the light emitting element 11 and a part on the outer periphery side on the outside of the watch glass 3. The wristwatch case 1 is positioned on the upper surface.

  Furthermore, as shown in FIG. 10, the light diffusing member 61 is provided with a diffusion plate 62 between the upper layer portion 32 and the lower layer portion 33, and the lower surface of the lower surface 33 facing the light emitting element 11 is the same as that of the fifth embodiment. Similarly to the configuration, the diffusion surface 52 is formed. In this case, the diffusion plate 62 provided between the upper layer portion 32 and the lower layer portion 33 allows light from the light emitting element 11 to pass through the watch glass 3 and the lower layer portion 33 of the light diffusing member 61 in order as in the fourth embodiment. When the light enters the upper layer portion 32, the incident light is diffused toward the entire area of the upper layer portion 32.

  Further, the diffusing surface 52 formed on the lower surface of the lower layer surface 33 of the light diffusing member 61 is formed in the corrugated irregularities as in the fifth embodiment, and the light from the light emitting element 11 is transmitted through the watch glass 3. When entering the lower layer part 33, the incident light is diffused toward the entire area of the lower layer part 33. It should be noted that the upper surface of the upper layer portion 32 of the light diffusing member 61 is desirably formed with a decorative uneven portion (not shown) as in the first embodiment.

  According to such a light emitting device 60 of a wristwatch, the light emitting element 11 is disposed on the side of the display unit 9 below the watch glass 3, and a part of the inner peripheral side is above the watch glass 3. 11 is disposed, and a light diffusing member 61 whose outer peripheral part is located outside the watch glass 3 is disposed, and a diffusion plate 62 is provided between the upper layer 32 and the lower layer 33 of the light diffusing member 61. At the same time, since the lower surface of the lower layer portion 33 facing the light emitting element 11 is formed on the diffusion surface 52, the light emitted from the light emitting element 11 is transmitted through the portion of the watch glass 3 facing the light emitting element 11 and the lower layer portion of the light diffusing member 61. The incident light can be diffused toward the entire area of the lower layer portion 33 by the diffusion surface 52 formed on the lower surface of the lower layer portion 33 when incident on the lower layer portion 33, and the diffused light can be diffused from the lower layer portion 33 to the upper layer portion 32. When entering the upper layer 32 and the lower layer 3 By the diffusion plate 62 provided between the can be further diffused toward the incident light to the entire region of the upper portion 32.

  For this reason, the light diverging member 61 has a part on the inner peripheral side thereof arranged on the upper side of the watch glass 3 facing the light emitting element 11 and a part on the outer peripheral part side arranged on the outer side of the watch glass 3. Even in the configuration, the light from the light emitting element 11 is diffused by both the diffusion surface 52 formed on the lower surface of the lower layer portion 33 and the diffusion plate 62 provided between the upper layer 32 and the lower layer portion 33. By doing so, similarly to the fifth embodiment, light can be uniformly transmitted through the entire area of the light diffusing member 61, that is, both the lower layer portion 33 and the upper layer portion 32, and can be diffused to the outside of the watch case 1. Thereby, the light emitted from the light emitting element 11 can be efficiently concentrated and diverged from the light diverging member 61 to the outside of the watch case 1.

  Also in this case, the light emitted from the light emitting element 11 is transmitted through only the portion of the watch glass 3 facing the light emitting element 11 and is incident on the lower layer portion 33 of the light diffusing member 61. Light is not irradiated toward the entire watch glass 3. The light diverging member 61 is configured such that a part of the inner peripheral side thereof is located above the watch glass 3 facing the light emitting element 11 and a part of the outer peripheral side is located outside the watch glass 3. Therefore, even if the light emitting element 11 is arranged close to the display unit 9, the divergence area of the light diffusing member 61 can be increased, and the central part of the light diffusing member 61 is separated from the display unit 9 as much as possible. Can do.

  For this reason, also in this light-emitting device 60, the light-diffusion member 61 was formed in the lower surface of the lower layer part 33 which opposes the light emitting element 11, without having the light influence with respect to the display part 9 similarly to Embodiment 5. FIG. By both the diffusion surface 52 and the diffusion plate 62 provided between the upper layer 32 and the lower layer portion 33, the light emitted from the light emitting element 11 is efficiently concentrated from the light diffusing member 61 to the outside of the watch case 1. Thus, the light diffusing member 61 can emit light brightly, and attention such as an alarm time can be triggered by light.

  In the fifth and sixth embodiments, the case where the lower surface of the lower layer portion 33 of the light diffusing members 51 and 61 facing the light emitting element 11 is formed on the diffusion surface 52 is described. Similarly to the second embodiment, the diffusion plate 22 may be provided on the lower surface of the lower layer portion 33 of the opposing light diffusing members 51 and 61. Even with such a configuration, the same effects as those of the fifth and sixth embodiments can be obtained.

  Moreover, in the said Embodiment 5, it is the structure which formed in the diffusion surface 34 the surface where the upper layer part 32 and the lower layer part 33 of the light-diffusion member 51 overlap, and in the said Embodiment 6, the upper-layer part 32 of the light-diffusion member 61. Although the case where it is the structure which provided the diffusion plate 62 between the lower layer part 33 was described, not only this but a diffusing agent was mixed in both the upper layer part 32 and the lower layer part 33, and this mixing was carried out. You may comprise so that the light from the light emitting element 11 may be diffused in the upper layer part 32 and the lower layer part 33, respectively by a diffusing agent.

  Furthermore, in the first to sixth embodiments, the case where the light emitting device of the present invention is applied to a wristwatch has been described. However, the light emitting device is not necessarily a wristwatch, and may be applied to various watches such as a travel watch, an alarm clock, a table clock, and a wall clock. Besides being applicable, it can be widely applied to various electronic devices such as mobile phones and PDAs (personal digital assistants).

1 is a front view of a wristwatch to which the present invention is applied. (Embodiment 1) It is an expanded sectional view of the principal part in the AA arrow of FIG. It is the figure which showed the optical path state of the light-emitting device in FIG. It is an expanded sectional view of the principal part which applied this invention to the wristwatch. (Embodiment 2) It is an expanded sectional view of the principal part which applied this invention to the wristwatch. (Embodiment 3) It is the figure which showed the optical path state of the light-emitting device in FIG. It is an expanded sectional view of the principal part which applied this invention to the wristwatch. (Embodiment 4) It is an expanded sectional view of the principal part which applied this invention to the wristwatch. (Embodiment 5) It is the figure which showed the optical path state of the light-emitting device in FIG. It is an expanded sectional view of the principal part which applied this invention to the wristwatch. (Embodiment 6)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Watch case 2 Opening part 3 Watch glass 4 Bezel 5 Watch module 8 Dial 9 Display part 10, 20, 30, 40, 50, 60 Light-emitting device 11 Light-emitting element 12, 21, 31, 41, 51, 61 Light-diffusion member 13, 34, 52 Diffusion surface 22, 42, 62 Diffusion plate 32 Upper layer portion 33 Lower layer portion

Claims (6)

An equipment case having an opening;
A display unit disposed inside the device case to face the opening;
Protective glass attached to the opening of the device case;
A light emitting element disposed on the lower side of the protective glass;
A light emitting device, comprising: a light diffusing member disposed on an upper side of the protective glass and having a diffusing function, a part of which is opposed to the light emitting element and the other part is positioned outside the protective glass. .   The light-emitting device according to claim 1, wherein the light-diffusing member has a configuration in which a lower surface facing the light-emitting element is formed as a diffusion surface.   The light emitting device according to claim 1, wherein the light diffusing member has a configuration in which a diffusion plate is provided on a lower surface facing the light emitting element.   2. The light emitting device according to claim 1, wherein the light diffusing member has a two-layer structure of an upper layer portion and a lower layer portion, and has a configuration in which an overlapping surface of the upper layer portion and the lower layer portion is formed on a diffusion surface. apparatus.   2. The light emitting device according to claim 1, wherein the light diffusing member has a two-layer structure of an upper layer portion and a lower layer portion, and a diffusion plate is provided between the upper layer portion and the lower layer portion. .   6. The light emitting device according to claim 4, wherein the light diffusing member has a configuration in which a lower surface of the lower layer portion facing the light emitting element is formed on a diffusing surface.

Images