CN110671638A - Annular lamp and electronic equipment - Google Patents
Annular lamp and electronic equipment Download PDFInfo
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- CN110671638A CN110671638A CN201910840722.0A CN201910840722A CN110671638A CN 110671638 A CN110671638 A CN 110671638A CN 201910840722 A CN201910840722 A CN 201910840722A CN 110671638 A CN110671638 A CN 110671638A
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- Prior art keywords
- light
- guide plate
- light guide
- area
- ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk of the light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
The application provides an annular lamp and electronic equipment including the annular lamp. The electronic equipment can be mobile phones, computers, sound boxes, fans and other electronic products. Shine the light homoenergetic to the income light zone of annular lamp in this application and can be perpendicular with the cambered surface of going into the light zone for light through going into the light zone and inciding to in the light guide plate can not produce the reflection on going into the income light cross-section in light zone, guarantees the entering that light can be whole in the light guide plate, avoid going into light loss, and then promote the light utilization ratio of light source, make obtain great light-emitting light ring circle when light source quantity is less, when realizing that annular lamp has big light-emitting light ring circle, reduce the power consumption and the calorific capacity of annular lamp.
Description
Technical Field
The present application relates to the field of electronic technology, and in particular, to an annular lamp and an electronic device including the annular lamp.
Background
A ring of annular lamps are often added around keys of electronic equipment or electric products, such as mobile phones, sound boxes and the like, so that the appearance effect of the annular lamps is increased. In order to obtain a large light-emitting aperture, a conventional annular lamp is generally configured by surrounding a plurality of light sources around the light-emitting aperture, and light rays of the plurality of light sources are transmitted to a light-emitting position, so that the annular lamp is obtained. However, the plurality of light sources arranged around the light source consume a large amount of power and generate a large amount of heat.
Disclosure of Invention
The application provides an annular lamp and electronic equipment, when the light-emitting light ring that aims at realizing the annular lamp has a great size, reduces the power consumption and the calorific capacity of annular lamp.
In a first aspect, the present application provides an annular lamp. The annular lamp comprises a light source and a light guide plate; the light guide plate comprises a first surface and a second surface opposite to the first surface, wherein a light inlet area is arranged on the first surface, an annular light outlet area is arranged on the second surface, and the orthographic projection of the light inlet area on a reference plane is positioned in a surrounding area of the orthographic projection of the annular light outlet area on the reference plane, wherein the reference plane is a plane perpendicular to the optical axis of the light guide plate; light emitted by the light source enters the light guide plate through the light inlet area and is emitted from the light outlet area; the light entering area comprises an inwards concave arc surface, and light irradiated to the light entering area by the light source is perpendicular to the arc surface.
The utility model provides an annular lamp of some embodiments, through making to shine to the light homoenergetic that goes into the light zone can be perpendicular with the cambered surface of going into the light zone, make the light that goes into the light zone and incide to the light guide plate in can not produce the reflection on going into the income light interface in light zone, thereby make in the entering light guide plate that light can be whole, avoid going into light loss, and then promote the light utilization ratio of light source, make light energy also can be comparatively sufficient when light source quantity is less, so that light can transmit distance far away in the light guide plate, even must obtain great light-emitting light ring when light source quantity is less, when realizing that annular lamp has big light-emitting light ring, reduce the power consumption and the calorific capacity of annular lamp.
In some embodiments, the arc of the light entrance area is a smooth arc. The light incoming area is a smooth cambered surface in the embodiment, and can be easily molded.
In some embodiments, the light incident area comprises a central area and a plurality of sub-areas sequentially arranged around the periphery of the central area, the sub-areas are in a concentric ring shape, the central area and the sub-areas both comprise sub-arcs and side faces, the side faces of the central area are connected with the sub-arcs of the central area and the sub-arcs of the sub-areas adjacent to the central area, the side faces of the sub-areas are connected with the sub-arcs of the two adjacent sub-areas, and the sub-arcs of the central area and the sub-arcs of the sub-areas form an arc face of. In this embodiment, go into the light zone and be fresnel surface, and each sub-arc shape of fresnel surface becomes the cambered surface in the light zone of this application to avoid the light that the light source sent to produce the reflection on going into the light interface in light zone, can make the indent degree in light zone reduce, thereby can attenuate the thickness of light guide plate, and then reduce the thickness of annular lamp, so that the application of annular lamp in electronic equipment.
In some embodiments, the light source is located on a side of the first surface of the light guide plate facing away from the second surface and spaced apart from the light guide plate. The light source and the light guide plate are arranged at intervals, so that light spots projected onto the light guide plate by the light source can cover the light incoming area of the light guide plate.
In some embodiments, the diameter of the annular light-emitting area is 20 to 50 times the distance from the light source to the light guide plate. In this embodiment, because the ratio of the diameter of the light emergent area to the diameter from the light source to the light guide plate is relatively large, that is, the annular lamp can obtain a relatively large aperture size under the condition of having a relatively thin thickness, thereby achieving a good application effect.
In some embodiments, the light source is disposed opposite to the light incident region, the center of the light source is located on a central axis of the light incident region, and the light source includes a light exit surface facing the light guide plate. In this embodiment, the center of light source is located the center pin of going into the light zone to make the light that the light source shines to each position of going into the light zone can be comparatively even, and then make the light-emitting of each position in light zone comparatively even, realize good light-emitting effect.
In some embodiments, the surface of the light guide plate is covered with a reflective layer, and the reflective layer is positioned in hollow areas of the light incident area and the light emergent area. In this embodiment, other regions except that go into the light zone and go out the light zone on the surface of light guide plate cover and have the reflection stratum for can be whole emergence total reflection when transmitting to the surface of light guide plate in the light guide plate, the light after the total reflection can continue to transmit in the light guide plate, thereby avoid light from the light guide plate except that the light zone other positions light leak or by the light guide plate absorption, further improve the light utilization ratio, and make light can transmit bigger distance in the light guide plate.
In some embodiments, the reflective layer is a metal plating or specially treated on the outer surface.
In some embodiments, a side of the reflective layer facing away from the light guide plate is covered with a light-shielding layer. In this embodiment, one side that the reflection stratum deviates from the light guide plate covers has the light shield layer, and except that going into light zone and other regions in light zone cover the light shield layer promptly on the surface of light guide plate to avoid light to spill from the other positions outside the light zone of light guide plate through the light shield layer, guarantee that ring lamps and lanterns have better luminous effect.
In some embodiments, the surface of the light guide plate is covered with black and white glue, the black and white glue comprises a white thin film layer and a black ink layer, and the black ink layer is formed on the white thin film layer and forms an integral structure with the white thin film layer; the white thin film layer is a reflecting layer, and the black ink layer is a shading layer. In this embodiment, the reflective layer and the light shielding layer may be an integral structure, and the reflective layer and the light shielding layer may be formed on the surface of the light guide plate by one process, so as to reduce the processes and the cost.
In some embodiments, a light diffuser is dispersed within the light guide plate. Light entering the light guide plate is reflected or refracted through the light diffusing agent, so that the light is uniformly dispersed in the light guide plate, the light can be transmitted in the light guide plate at a farther distance, the light emitted by the light source can be transmitted in the light guide plate at a farther distance under the condition that the light source is unchanged, a larger aperture can be obtained by using fewer light sources, and the power consumption and the heat productivity of the annular lamp are reduced.
In some embodiments, the ring-shaped lamp further comprises a decorative plate, the decorative plate is arranged in the area surrounded by the light emergent area, and the decorative plate is used for enhancing the appearance effect of the ring-shaped lamp.
In some embodiments, the annular light-emitting area of the second surface is provided with an annular protrusion, an end face of the annular protrusion, which is away from the light guide plate, is a light-emitting surface, the decorative plate is embedded in an annular space defined by the annular protrusion, and one face of the decorative plate, which is away from the light guide plate, is coplanar with the light-emitting surface, so that the annular lamp has a better appearance effect.
In some embodiments, the ring-shaped light further includes a fixing portion and a plurality of connecting arms, the fixing portion is located at the periphery of the light guide plate and spaced apart from the light guide plate, the plurality of connecting arms are connected between the light guide plate and the fixing portion, and the connecting arms have elasticity. In the embodiment of the application, the fixing part is used for fixing the light guide plate. Moreover, the connecting arms have elasticity, so that when the fixing part is fixed, the connecting arms can be elastically deformed when the light guide plate is subjected to a force in the axial direction of the light guide plate (namely, the direction parallel to the central axis), and when the force on the light guide plate is removed, the light guide plate can be restored to the original position.
In a second aspect, some embodiments of the present application provide an electronic device, where the electronic device includes a device housing and an annular lamp, an opening is formed in the device housing, the annular lamp is fixed in the device housing, and a light exit area of the light guide plate is exposed out of the device housing through the opening. The annular lamp is arranged on the electronic equipment, so that the appearance effect of the electronic equipment is enhanced.
Drawings
To more clearly illustrate the structural features and effects of the present application, a detailed description is given below in conjunction with the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of an electronic device according to some embodiments of the present application;
FIG. 2 is an exploded view of one orientation of a ring light of the electronic device shown in FIG. 1;
FIG. 3 is an exploded view of the annular lamp of the electronic device of FIG. 1 in another orientation;
FIG. 4 is a cross-sectional view of the ring light of the embodiment of FIG. 2 taken along the direction II-II;
FIG. 5 is an enlarged schematic view of a light incident region of a light guide plate according to another embodiment of the present disclosure;
FIG. 6 is a schematic partial cross-sectional view of the light guide plate of the embodiment shown in FIG. 5 along the direction II-II;
FIG. 7 is a radiation pattern of a light source according to some embodiments of the present application;
FIG. 8 is a schematic view of a ring lamp according to further embodiments of the present application;
FIG. 9 is an enlarged schematic view of position II of the ring lamp of the embodiment of FIG. 4;
FIG. 10 is a schematic cross-sectional view of a ring lamp according to further embodiments of the present application;
FIG. 11 is a schematic cross-sectional view of a ring lamp according to further embodiments of the present application;
FIG. 12 is a top view of a ring lamp according to other embodiments of the present application;
FIG. 13 is a schematic cross-sectional view of the ring lamp of FIG. 12 taken along the direction I-I;
fig. 14 is a schematic partial cross-sectional view along the direction I-I of the electronic device of the embodiment shown in fig. 1.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
The application provides an electronic device, which can be an electronic product such as a mobile phone, a computer, a sound box, a fan and the like. The annular lamp is arranged on the electronic equipment to increase the appearance effect of the electronic equipment. For example, the annular lamp is arranged on the sound box, so that the sound box is lightened when in operation, the appearance effect of the sound box is enhanced, and the operating state of the sound box can be judged according to the operating state of the annular lamp. Or, the annular lamp is arranged at the key position of the mobile phone or the sound box, so that the light emitting aperture of the annular lamp is arranged around the key, the appearance effect of the mobile phone or the sound box can be improved, and meanwhile, the position of the mobile phone key or the sound box key can be marked, so that the mobile phone or the sound box can be used in the dark night. Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device 200 according to the present application. In this embodiment, the electronic device 200 is an electronic speaker. The electronic device 200 includes a device housing 110 and a ring light 100. The device housing 110 is provided with an opening 111, and the ring-shaped lamp 100 is fixed in the device housing 110.
Referring to fig. 2, fig. 2 is a schematic structural diagram of the ring lamp 100 of the electronic device 200 shown in fig. 1. The ring lamp 100 includes a light source 10 and a light guide plate 20. The light source 10 is located at one side of the light guide plate 20 and has a certain distance from the light guide plate 20, and light emitted from the light source 10 enters the light guide plate 20 and is transmitted in the light guide plate 20 for a certain distance and then exits, thereby obtaining an annular aperture. The ring-shaped lamp 100 includes a light guide plate 20, and a light exit area 221 for exiting light is provided on the light guide plate 20. The light exit region 221 is annular. When the ring-shaped lamp 100 is fixed in the light guide plate 20, the light exit area 221 of the light guide plate 20 is exposed out of the device housing 110 through the opening 111. The ring-shaped lamp 100 can generate a ring-shaped aperture when emitting light, so as to improve the appearance effect of the electronic device 200. The annular light-emitting area 211 may be a ring in various shapes such as a circular ring, a square ring, a triangular ring, etc., according to actual requirements. In this embodiment, the light exit area 211 of the ring-shaped lamp 100 is shaped as a circular ring, and a circular light exit aperture can be obtained. In some embodiments, the ring light 100 further includes a circuit board 30, and the light source 10 is fixed to the circuit board 30.
The light guide plate 20 is made of a light guide material so that light can be transmitted within the light guide plate 20. The light guide plate 20 may be made of glass, resin, or acrylic. In some embodiments, the light guide plate 20 has a light diffuser dispersed therein, and the light diffuser may be inorganic fine powder (such as titanium dioxide) or organic fine powder (such as acrylic or silicone). The light entering the light guide plate 20 is reflected or refracted by the light diffusing agent, so that the light is uniformly dispersed in the light guide plate 20, and the light can be transmitted in the light guide plate 20 for a longer distance, and therefore, under the condition that the light source 10 is not changed, the light emitted by the light source 10 can be transmitted in the light guide plate 20 for a longer distance, and therefore, a larger aperture can be obtained by using fewer light sources 10, and the power consumption and the heat productivity of the annular lamp 100 are reduced. For example, in some embodiments, the light diffusing agent is organic micro-powder, which is made of a material different from that of the light guide plate 20 and is capable of allowing light to pass through. The refraction takes place when the light of transmission in the light guide plate 20 transmits to organic miropowder for the comparatively strong light that light source 10 sent carries out even dispersion after the refraction, thereby can enlarge the light emitting area, makes the light of each position more even in the light guide plate 20, avoids the not enough problem of light intensity when light transmits to the light-emitting position. Moreover, by the refraction effect of the organic micro powder, the light is transmitted to the inner wall surface of the light guide plate 20, the loss of light intensity caused by multiple reflections of the light on the inner wall surface of the light guide plate 20 is reduced, the utilization rate of the light is further improved, and the transmission distance of the light is prolonged.
Referring to fig. 2 and 3, fig. 2 and 3 are schematic structural diagrams of the annular lamp 100 of the electronic device 200 shown in fig. 1 in different directions. The light guide plate 20 includes a first surface 21 and a second surface 22 opposite to the first surface 21. The light source 10 is located at a side of the first surface 21 facing away from the second surface 22. Specifically, referring to fig. 2, a light incident region 211 is disposed on the first surface 21, and light emitted from the light source 10 is incident into the light guide plate 20 from the light incident region 211. The light entrance region 211 is a region surrounded by the peripheral edge 211a of the light entrance region 211. Referring to fig. 3, the annular light-emitting area 221 is located on the second surface 22. The light exit area 221 includes an inner ring 221a and an outer ring 221b surrounding the inner ring 221a (i.e., the side of the inner ring 221a away from the center), and the light exit area 221 is a region between the inner ring 221a and the outer ring 221 b. The light exits from the light exit region 221, thereby obtaining an annular aperture. In this embodiment, the light exit area 221 is a circular ring, and the inner ring 221a and the outer ring 221b are concentric rings, so that the distance from any position of the inner ring 221a to the outer ring 221b is the same, thereby obtaining an annular aperture with uniform width at each position, and achieving a better decoration effect. It is understood that, in some embodiments, the centers of the inner ring 221a and the outer ring 221b may not coincide, and the inner ring 221a and the outer ring 221b may have different shapes according to the actual decoration effect requirement.
Referring to fig. 4, fig. 4 is a schematic cross-sectional view of the ring-shaped lamp 100 of the embodiment shown in fig. 2 along the direction II-II. In the embodiment of the present application, the orthographic projection of the light incoming region 211 on the reference plane is located in a surrounding area of the orthographic projection of the annular light outgoing region 221 on the reference plane. That is, the orthographic projection of the light incoming area 211 on the reference plane is located within the orthographic projection of the inner ring 221a of the light outgoing area 221 on the reference plane. Wherein the reference plane is a plane perpendicular to the central axis a of the light guide plate 20. In other words, the distance L2 from the periphery 211a of the light incident region 211 to the central axis a of the light guide plate 20 is smaller than the distance L3 from the inner ring 221a of the light exit region 221 to the central axis a, and the light incident into the light guide plate 20 through the light incident region 211 needs to be transmitted in the radial direction of the light guide plate 20 (the direction perpendicular to the central axis a) for a certain distance before the light can exit from the light exit region 221. In a case where the same aperture size needs to be obtained, the light entering through the light entrance region 211 can be transmitted for a certain distance in the radial direction of the light guide plate 20 and then emitted from the light exit region 221, and compared to a mode that the light of the light source 10 is directly irradiated to the position on the first surface 22 opposite to the light exit region 221, and then the light is transmitted to the light exit region 221 along the axial direction of the light guide plate 20 (the direction parallel to the central axis a) and emitted, because the size of the light entrance region 211 is smaller than that of the inner ring 221a of the light exit region 221, the area covered by the light emitted by the light source 10 can be smaller, and therefore, the light source 10 can be closer to the light guide plate 20, and the thickness of the ring lamp 100 can be reduced. Specifically, when light is emitted from the light exit area 221 after the light cannot be transmitted in the radial direction of the light guide plate 20, if a larger light emitting aperture is required, the distance from the light source 10 to the light guide plate 20 needs to be longer, so that the light spot size irradiated by the light source 10 onto the light guide plate 20 is larger and covers the range of the light emitting aperture, and the light emitting aperture can emit light. And in this application, the light incident on the light incident area 211 is transmitted to the light emergent area 221 by the light guide plate 20 along the radial direction of the light guide plate 20, so that the distance between the light source 10 and the light guide plate 20 can be smaller, and therefore, under the condition of obtaining the same aperture size, the distance between the light source 10 and the light guide plate 20 can be closer, the size of the light spot irradiated by the light source 10 onto the light guide plate 20 only covers the light incident area 211, and therefore, the thickness of the ring-shaped lamp 100 can be reduced, and the application of the ring-shaped lamp 100 in electronic equipment is facilitated. In some embodiments of the present application, the radial direction of the annular light exit area 221 has a dimension 20 to 50 times of the distance L1 from the light source 10 to the light guide plate 20. Here, the size of the light exit area 221 in the radial direction is 2 times the distance L3 from the outer ring 221b to the central axis a. In this embodiment, since the light-emitting area 221 is a circular ring and the outer ring 221b is a circular ring, the radial dimension of the light-emitting area 221 is the diameter of the outer ring 221 b. In some embodiments, when the light exiting region 221 is a square ring or a triangular ring, the radial dimension of the light exiting region 221 is the diameter of a circle circumscribing the outer ring 221b of the light exiting region 221. The distance from the light source 10 to the light guide plate 20 refers to a vertical distance from the center of the light source 10 to a plane perpendicular to the central axis of the light guide plate 20 and passing through the center of the light guide plate 20. In some embodiments, the central axis of the light source 10 coincides with the central axis of the light guide plate 20, and the distance between the center of the light source 10 and the center of the light guide plate 20 is the distance between the center of the light source 10 and the center of the light guide plate 20.
In some embodiments, the light incident region 211 has the same shape as the light exit region 221 of the ring-shaped lamp 100, and the center of the light incident region 211 is coaxial with the center of the light exit region 221. That is, the distance from the edge of the light incident region 211 to each position of the light exit region 221 is the same, and when the light of the light source 10 uniformly enters each direction in the light guide plate 20, the intensity of the light transmitted to each position of the light exit region 221 of the ring-shaped lamp 100 through the light guide plate 20 is the same, thereby achieving uniform light exit at each position of the ring-shaped lamp 100. For example, when the shape of the light exit region 221 of the ring-shaped lamp 100 is circular, the shape of the light entrance region 211 is also circular; when the light exit area 221 of the ring-shaped lamp 100 has a square shape, the light entrance area 211 also has a square shape. The shape of the light incident area 211 is the edge contour shape of the light incident area 211, and the shape of the light exit area 221 of the ring lamp 100 is the shape surrounded by the aperture. In this embodiment, the center of the light incident region 211 and the center of the light exiting region 221 are both located on the central axis a of the light guide plate 20.
The light incident region 211 comprises a cambered surface concavely arranged from the first surface 21 to the second surface 22, and light rays irradiated to the light incident region 211 by the light source 10 are perpendicular to the cambered surface. Specifically, the light path simulation of the light source 10 confirms the direction of the outgoing light path of the light source 10, and the outgoing light path profiling of the light source 10 obtains a required arc surface shape, so that the light rays incident to each position of the light incident area 211 can be perpendicular to the arc surface of the light incident area 211. Through making light source 10 shine to the light that goes into light zone 211 perpendicular with the cambered surface, can avoid shining to the light that goes into light zone 211 and reflect on the incident interface who goes into light zone 211, make shine to the light that goes into light zone 211 can be whole in getting into light guide plate 20, make under the unchangeable condition of specification and quantity of light source 10, the increase goes into the income light quantity in the light guide plate 20, improve light source 10's light utilization ratio, thereby make light can transmit farther distance in light guide plate 20, in order to obtain bigger light-emitting light ring.
In some embodiments, the arc of the light incident area 211 is a smooth arc. The arc shape of the light entrance region 211 obtained by profiling may be any type of smooth arc surface. For example, the curved surface may be a hemispherical surface, a spline surface, or the like.
Referring to fig. 5 and 6, fig. 5 is an enlarged schematic view of a light incident region 211 of a light guide plate 20 according to some other embodiments of the present application; fig. 6 is a partial cross-sectional view of the light guide plate 20 of the embodiment shown in fig. 5 along the direction II-II. The light incident region 211 of the light guide plate 20 of the embodiment shown in fig. 5 is a fresnel surface. Specifically, the light incident region 211 includes a central region 223 and a plurality of sub-regions 222 sequentially arranged around the periphery of the central region 223. The plurality of sub-regions 222 are in concentric rings, i.e., the centers of each sub-region coincide. The central region 223 includes a sub-arc surface 223a and a side surface 223 b. Each sub-region 222 comprises a sub-arc surface 222a and a side surface 222b, and the side surface 222b of each sub-region 222 connects the sub-arc surfaces 222a of two adjacent sub-regions 222. The side 223b of the central region 223 connects the sub-arc surface 223a and the sub-arc surface 222a of the sub-region 222 adjacent to the central region 223. The direction of curvature of the sub-arc surface 222a of each sub-area 222 is directed towards the side of the first surface 21 facing away from the second surface 22. The side 222b of each sub-area 222 is parallel to the central axis a of the light guide plate 20. The sub arc surface 223a of the central region 223 and the sub arc surfaces 222a of the plurality of sub regions 222 form an arc surface of the light incident region 211, so that any light incident to the light incident region 211 can be incident perpendicular to the sub arc surface 223a or the sub arc surface 222a, and all the light incident to the light incident region 211 can enter the light guide plate 20, thereby improving the light utilization rate of the light source 10 and increasing the transmission distance of the light in the light guide plate 20. Moreover, the light incident area 211 of the light guide plate 20 is set to be a fresnel surface, so that the concave degree of the light incident area 211 can be reduced, the thickness of the light guide plate 20 can be reduced, and the thickness of the ring-shaped lamp 100 can be reduced, so that the ring-shaped lamp 100 can be applied to electronic equipment.
Referring back to fig. 4, the light source 10 is disposed opposite to the light incident region 211, that is, the orthographic projection of the light incident region 211 on the reference plane covers the orthographic projection of the light source 10 on the reference plane. Moreover, the light emitting surface of the light source 10 faces the light guide plate 20, so that the light emitted from the light source 10 can enter the light guide plate 20 from the light incident region 211 as much as possible. In some embodiments of the present application, the light source 10 corresponds to a central position of the light incident region 211, that is, the center of the light source 10 is located on the central axis a of the light incident region 211, so that light of the light source 10 can be uniformly emitted into each position of the light incident region 211. Further, in some embodiments, the type of the light source 10 matches the shape of the light incident region 211, in other words, the shape of the light spot irradiated by the light source 10 onto the first surface 21 needs to be the same as the shape of the light incident region 211, so that the light of each light source 10 of the light source 10 can be more uniformly emitted into each position of the light incident region 211. Since the light incident to each position of the light incident region 211 is uniform, the light emitted from each position of the light emitting region 221 is uniform, and the ring-shaped lamp 100 has a better appearance effect. For example, when the shape of the light spot of the light source 10 irradiated to the first surface 21 is a circle, the shape of the light incident region 211 is a circle; when the shape of the light spot of the light source 10 irradiated to the first surface 21 is square, the shape of the light incident region 211 is square.
In some embodiments, the size of the light incident region 211 matches the effective emitting angle of the light source 10, so that light within the effective emitting angle of the light source 10 can be incident on the light incident region 211 when being irradiated onto the first surface 21, so that most of the light energy of the light source 10 can enter the light guide plate 20, thereby ensuring a higher light utilization rate of the light source 10 and reducing the size of the light incident region 211 as much as possible. Because the size of the light incoming region 211 is reduced, and the bending degree of each position of the light incoming region 211 is kept unchanged, the light rays incident to each position of the light incoming region 211 can be perpendicular to the light incoming region 211, so that the concave degree of the light incoming region 211 can be reduced, and the thickness of the light guide plate 20 is reduced. Specifically, the size of the light incident region 211 needs to be equal to or slightly larger than the effective light emitting region of the light source 10, that is, the size of the light incident region 211 needs to be equal to or slightly larger than the size of the irradiation region of the light emitted within the effective emission angle of the light source 10 on the first surface 21, so that the light emitted within the effective emission angle of the light source 10 can completely enter the light guide 20 through the light incident region 211. Specifically, when the center of the light source 10 is located on the central axis a of the light incident region 211, the distance between the center of the light source 10 and the peripheral edge 211a of the light incident region 211 is L1Of the light source 10The distance L from the edge of the light incident region 211 to the central axis a thereof when the effective emission angle is α2Is equal to or slightly greater than L1tan α, so that all light rays within the effective emission angle α of the light source 10 can be incident to the light incident region 211 to enhance the light utilization efficiency of the light source 10. The distance from the light source 10 to the light incident region 211 is the distance from the light source 10 to the plane where the edge of the light incident region 211 is located. The radius of the light entrance region 211 is a radius of a region surrounded by edges of the light entrance region 211. Distance L between edge of light source 10 and plane of periphery of light incident region 2111Is determined according to the size of the assembly space of the actual ring lamp 100.
For example, FIG. 7 shows a radiation pattern of a light source 10 of the present application, illustrating the relative radiation density of the light source 10 at different emission angles. The concentric circles with the center point O as the center point in the figure represent the magnitude of the relative radiation density, for example, 0.1 to 1.0 in the figure represent the relative radiation density of 10% to 100%, respectively. Radial lines perpendicular to the concentric circles in the figure indicate different emission angles of the light source 10. Wherein, 0 degree to 90 degrees respectively represent that the angle formed by the emission angle and the central axis a is +/-0 degree to +/-90 degrees. It can be seen that the relative radiation density of the light source 10 is above 30% when the emission angle is within 70 °, i.e. the effective emission angle of the light source 10 in the embodiment shown in fig. 6 is within ± 70 ° of the central axis a of the light source 10. When the distance from the center of the light source 10 to the plane where the edge of the light incident region 211 is located is L1The distance from the edge of the light incident region 211 to the central axis a is equal to or slightly greater than L1tan70 ° so that light emitted by the light source 10 within the effective emission angle can all enter the light entrance region 211, enhancing the light source 10 utilization. In addition, the problem of the excessive thickness of the light guide plate 20 due to the excessive light incident area 211 can be avoided, and the thickness of the ring-shaped lamp 100 can be reduced.
In the present application, the number of the light sources 10 may be one or more. For example, when the required aperture is small or the brightness of the aperture may be low, a single light source 10 may be used; when the required aperture is large or the brightness requirement of the aperture is high, a plurality of light sources 10 may be used. In the embodiment shown in fig. 2, there is one light source 10 of the ring-shaped lamp 100, and the center of the light source 10 is located on the central axis a of the light incident region 211, so that the light intensity of the light source 10 irradiated to each position of the light incident region 211 is the same, and the light at each position of the light emitting region 221 is uniform when the light is finally emitted from the light emitting region 221 after being transmitted by the light guide plate 20, so as to achieve a good light emitting effect. Referring to fig. 8, fig. 8 is a schematic structural diagram of a ring lamp 100 according to another embodiment of the present application. In the embodiment shown in fig. 8, the light sources 10 are provided in plural, the plural light sources 10 are collectively provided at positions facing the light entrance region 211, and the plural light sources 10 are integrated, whereby the arc shape of the light entrance region 211 can be obtained by simple profiling. The center of the light sources 10 is located on the central axis a of the light incident region 211, so that all the light emitted from the light sources 10 to the light incident region 211 can be transmitted to the light guide plate 20. Compared with a plurality of light sources 10 in the prior art, the utilization rate of the light source 10 of each light source 10 is improved, so that the number of the light sources 10 can be reduced when the same light-emitting effect is achieved, energy is saved, and heat emission is reduced.
Referring to fig. 9, in some embodiments of the present application, the surface of the light guide plate 20 is covered with the reflective layer 40, and regions of the reflective layer 40 corresponding to the light incident region 211 and the light exit region 221 are hollowed out. In other words, the reflective layer 40 covers other regions of the surface of the light guide plate 20 except the light incident region 211 and the light exiting region 221, so that the light in the light guide plate 20 can be totally reflected when being transmitted to the surface of the light guide plate 20, and the totally reflected light can be continuously transmitted in the light guide plate 20, thereby preventing the light from leaking from other positions of the light guide plate 20 except the light exiting region 221 or being absorbed by the light guide plate 20, further improving the light utilization rate, and enabling the light to be transmitted for a longer distance in the light guide plate 20. In some embodiments, the reflective layer 40 may be formed by surface-treating the other regions of the light guide plate 20 except the light incident region 211 and the light emergent region 221. For example, by performing a process such as polishing on the surface of the light guide plate 20 except for the light incident region 211 and the light emergent region 221, the surface of the light guide plate 20 after polishing can perform total reflection on the light transmitted to the light incident region in the light guide plate 20, that is, the surface of the light guide plate 20 after surface treatment forms the reflective layer 40. Alternatively, in some embodiments, a metal plating layer with good reflection effect, such as a silver plating layer, an aluminum plating layer, etc., is plated on the outer surface of the light guide plate 20 by sputtering, evaporation, etc. Alternatively, in some embodiments, a reflective film may be directly attached to the outer surface of the light guide plate 20 to form the reflective layer 40. The reflecting film can be a metal film layer, a white glue layer and other film layers. It is understood that the examples of the reflective layer 40 of some embodiments of the present application are given herein only, and the kind of the reflective layer 40 of the present application is not limited.
In some embodiments of the present application, the light shielding layer 50 is stacked on a surface of the reflective layer 40 facing away from the light guide plate 20, so as to avoid light leakage from other positions outside the light emergent area 211 of the light guide plate 20 through the light shielding layer 50, and ensure that the ring-shaped lamp 100 has a better light emitting effect. The light shielding layer 50 may be a light shielding material such as a black ink layer, and is formed on a surface of the reflective layer 40 away from the light guide plate 20 by a coating process; alternatively, the light-shielding layer 50 may be a black film or the like, and is formed on the surface of the reflective layer 40 facing away from the light guide plate 20 by a bonding method.
In some embodiments, the reflective layer 40 and the light shielding layer 50 may be an integral structure, and the reflective layer 40 and the light shielding layer 50 can be formed on the surface of the light guide plate 20 by one process, which can reduce the process and the cost. For example, in an embodiment of the present application, the integral structure of the reflective layer 40 and the light shielding layer 50 is black and white glue. One side of the black and white glue is white, and the other side is black. The white surface is attached to the outer surface of the light guide plate 20, thereby reflecting the light transmitted to the surface of the light guide plate 20 in the light guide plate 20. The black one side of black white glue deviates from light guide plate 20, can avoid light leak from light guide plate 20 in the in-process of light pipe inboard transmission. In some embodiments, the black-and-white glue includes a white film layer and a black ink layer stacked on the white film layer. The side of the white film layer, which is far away from the ink layer, is a white surface of the black and white glue, and the side of the black film layer, which is far away from the white film layer, is a black surface of the black and white glue. In this embodiment, the white film layer is the reflective layer 40, and the black ink layer is the light-shielding layer 50.
Referring to fig. 10, in some embodiments of the present application, the ring lamp 100 further includes a decorative plate 60, and the decorative plate 60 is disposed in an inner ring surrounding area of the light exit area 221. The decorative plate 60 serves to enhance the appearance of the ring light 100. In addition, the decorative plate 60 is arranged in the region surrounded by the light emitting region 221, so that the light shading effect of the region surrounded by the annular light emitting region 221 can be enhanced, light leakage is avoided, and a better light emitting effect is presented.
In some embodiments, the light-exiting area 221 of the second surface 22 is provided with an annular protrusion 25, and the annular protrusion 25 protrudes from the second surface 22. The annular protrusion 25 is formed of the same material as the light guide plate 20 and is integrally formed with the light guide plate 20. The annular protrusion 25 includes a light emitting surface 251, and an inner wall surface 252 and an outer wall surface 253 which are disposed opposite to each other, and the light emitting surface 251 is located between the inner wall surface 252 and the outer wall surface 253 and connects the inner wall surface 252 and the outer wall surface 253. The surface far away from the light exit area 221 is a light exit surface 251, and light transmitted in the light guide plate 20 enters the annular protrusion 25 through the light exit area 221, and finally exits from the light exit surface 251 of the annular protrusion 25 after being transmitted in the annular protrusion 25, so that the annular diaphragm is obtained. In some embodiments, the reflective layer 40 and the light shielding layer 50 are covered on the other surfaces of the annular protrusion 25 except the light emitting surface 251, so as to prevent the light transmitted in the annular protrusion 25 from being absorbed and leaked by the other positions of the annular protrusion 25 except the light emitting surface, so that the light transmitted in the annular protrusion 25 is emitted from the light emitting surface 251 of the annular protrusion 25 as much as possible, thereby having a better light emitting effect.
In some embodiments, the decoration plate 60 is embedded in the area surrounded by the annular protrusion 25, so that the decoration plate 60 is more stably fixed on the light guide plate 20. The decorative plate 60 includes a bottom surface 61 attached to the light guide plate 20, a top surface 62 opposite to the bottom surface 61, and a side surface 63 connected between the bottom surface 61 and the top surface 62, and when the decorative plate 60 is embedded in an area surrounded by the annular protrusion 25, the side surface 63 of the decorative plate 60 is attached to the inner wall surface 252 of the annular protrusion 25. Moreover, the surface of the decorative plate 60 facing away from the light guide plate 20 is coplanar with the light-emitting surface 251 of the annular protrusion 25, so that the annular lamp 100 has a better appearance effect.
Referring to fig. 11, fig. 11 is a cross-sectional view of a ring lamp 100 according to another embodiment of the present application. In some embodiments, the ring lamp 100 further includes a fixing portion 41, and the fixing portion 41 is connected to the light guide plate 20 to fix the light guide plate 20 to other structures. The light guide plate 20 includes a circumferential surface 23 connected between the first surface 21 and the second surface 22. In the embodiment shown in fig. 11, the fixing portion 41 is a protrusion structure protruding from the peripheral surface 23. Referring to fig. 12 and 13, fig. 12 is a top view of a ring lamp 100 according to another embodiment of the present application; fig. 13 is a schematic sectional view of the ring-shaped lamp 100 of the embodiment shown in fig. 12 along the direction I-I. In the embodiment shown in fig. 12, the ring lamp 100 further includes a plurality of connecting arms 42, the fixing portion 41 is located at the periphery of the light guide plate 20 and spaced apart from the light guide plate 20, and the plurality of connecting arms 42 are connected between the light guide plate 20 and the fixing portion 41. In some embodiments, the connection arms 42 have elasticity, so that when the fixing portion 41 is fixed, the connection arms 42 are elastically deformed when the light guide plate 20 is subjected to a force in an axial direction of the light guide plate 20 (i.e. a direction parallel to the central axis a), and when the force on the light guide plate 20 is removed, the light guide plate 20 can return to the original position. In some embodiments, the button 70 may be disposed on a side of the light guide plate 20 facing the light source 10. In some embodiments, the button 70 is provided on the circuit board 30. The first surface 21 of the light guide plate 20 is provided with a pressing portion 212 protruding from the first surface 21, and the pressing portion 212 is disposed opposite to the button 70. When the light guide plate 20 is pressed in the axial direction, the light guide plate 20 moves toward the circuit board 30, and the pressing portion 212 contacts the button 70 to press the button 70. The button 70 may be any button switch, for example, a power button, a volume adjustment button, or the like.
In this application, go into light zone 211 through setting up, and make the light homoenergetic that shines to going into light zone 211 perpendicular with the cambered surface of going into light zone 211, thereby avoid producing the reflection on going into the income plain noodles of light zone 211 through going into light zone 211 light that light zone 211 incides to light guide plate 20, avoid light loss, and then promote the light utilization ratio of light source 10, make light energy also can be comparatively sufficient when light source 10 quantity is less, light can transmit distance far away in light guide plate 20. In other words, it is possible to achieve a large light exit aperture with a small number of light sources 10, and to reduce power consumption and heat generation of the ring lamp 100 while achieving a large light exit aperture of the ring lamp 100.
Referring to fig. 14, fig. 14 is a schematic partial cross-sectional view along the direction I-I of the electronic device 200 of the embodiment shown in fig. 1. In this embodiment, the ring-shaped lamp 100 is fixed to the device housing 110 of the electronic device 200 and the light exit area 221 of the light guide plate 20 just exposes the device housing 110 through the opening 111 on the device housing 110. Specifically, in the present embodiment, the ring-shaped lamp 100 is the ring-shaped lamp 100 of the embodiment shown in fig. 11. The fixing portion 41 of the light guide plate 20 is fixed to an inner surface of the device case 110 to fixedly couple the light guide plate 20 with the device case 110. In this embodiment, there are four buttons 70, and all four buttons 70 are disposed on the circuit board 30. The four buttons 70 are a volume up button, a volume down button, a talk button, and a microphone button, respectively. The four pressing portions 212 are disposed on the first surface 21 of the light guide plate 20, the four pressing portions 213 correspond to the four buttons 70 one by one, and when the volume needs to be increased, decreased, or a microphone needs to be used, the corresponding positions of the light guide plate 20 and the buttons 70 are pressed axially, so that the desired functions can be realized. It is understood that the number and function of the buttons 70 in the present application are for illustration only and not limited thereto.
In the foregoing description, for the purposes of describing certain embodiments of the present application, it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (12)
1. An annular lamp is characterized by comprising a light source and a light guide plate;
the light guide plate comprises a first surface and a second surface opposite to the first surface, wherein a light incoming area is arranged on the first surface, an annular light outgoing area is arranged on the second surface, and the orthographic projection of the light incoming area on a reference plane is positioned in a surrounding area of the orthographic projection of the annular light outgoing area on the reference plane, wherein the reference plane is a plane perpendicular to the optical axis of the light guide plate; light emitted by the light source enters the light guide plate through the light inlet area and is emitted from the light outlet area;
the light entering area comprises an inwards concave arc surface, and light irradiated to the light entering area by the light source is perpendicular to the arc surface.
2. The ring-shaped lamp according to claim 1, wherein the light incident area includes a central area and a plurality of sub-areas sequentially arranged around the periphery of the central area, the sub-areas are in concentric rings, the central area and the sub-areas each include a sub-arc surface and a side surface, the side surface of the central area connects the sub-arc surfaces of the central area and the sub-arc surfaces of the sub-areas adjacent to the central area, the side surfaces of the sub-areas connect the sub-arc surfaces of two adjacent sub-areas, and the sub-arc surfaces of the central area and the sub-arc surfaces of the sub-areas form the arc surface of the light incident area.
3. The ring-shaped lamp of claim 1, wherein the arc surface of the light entrance area is a smooth arc surface.
4. The ring lamp as claimed in claim 1, wherein the light source is positioned on a side of the first surface of the light guide plate facing away from the second surface and spaced apart from the light guide plate.
5. The ring-shaped lamp according to claim 4, wherein a diameter of the light exit area of the ring shape is 20 to 50 times a distance from the light source to the light guide plate.
6. The ring-shaped lamp as claimed in claim 4, wherein the light source is disposed opposite to the light incident area, the center of the light source is located on the central axis of the light incident area, and the light source includes a light exit surface facing the light guide plate.
7. The ring-shaped lamp according to claim 1, wherein a surface of the light guide plate is covered with a reflective layer, and regions of the reflective layer located in the light incident region and the light emergent region are hollowed out.
8. The ring lamp as claimed in claim 7, wherein a side of the reflective layer facing away from the light guide plate is covered with a light shielding layer.
9. The ring-shaped lamp according to claim 8, wherein the surface of the light guide plate is covered with black and white glue, the black and white glue comprises a white thin film layer and a black ink layer, and the black ink layer is formed on the white thin film layer and forms an integral structure with the white thin film layer; the white thin film layer is the reflecting layer, and the black ink layer is the shading layer.
10. The ring lamp as claimed in claim 1, wherein a light diffusing agent is dispersed in the light guide plate.
11. The ring lamp as claimed in claim 1, further comprising a fixing portion located at a periphery of the light guide plate and spaced apart from the light guide plate, and a plurality of connection arms connected between the light guide plate and the fixing portion, the connection arms having elasticity.
12. An electronic device comprising a device housing and the ring-shaped lamp of any one of claims 1 to 11, wherein the device housing is provided with an opening, the ring-shaped lamp is fixed in the device housing, and the light exit area of the light guide plate is exposed out of the device housing through the opening.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910840722.0A CN110671638A (en) | 2019-09-02 | 2019-09-02 | Annular lamp and electronic equipment |
| PCT/CN2020/109530 WO2021042973A1 (en) | 2019-09-02 | 2020-08-17 | Ring lamp and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910840722.0A CN110671638A (en) | 2019-09-02 | 2019-09-02 | Annular lamp and electronic equipment |
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| CN110671638A true CN110671638A (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910840722.0A Pending CN110671638A (en) | 2019-09-02 | 2019-09-02 | Annular lamp and electronic equipment |
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| CN (1) | CN110671638A (en) |
| WO (1) | WO2021042973A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021042973A1 (en) * | 2019-09-02 | 2021-03-11 | 华为技术有限公司 | Ring lamp and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113209495B (en) * | 2021-06-19 | 2022-10-25 | 陕西中医药大学附属医院 | Novel rheumatism thermotherapy equipment |
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| DE102014115825A1 (en) * | 2014-10-30 | 2016-05-04 | Itz Innovations- Und Technologiezentrum Gmbh | Luminaire assembly with optical element |
| CN206209148U (en) * | 2016-11-09 | 2017-05-31 | 广州视源电子科技股份有限公司 | Can uniform light extraction light guide structure and knob |
| CN206398633U (en) * | 2016-12-09 | 2017-08-11 | 深圳市雅康诚科技发展有限公司 | Annular light guide plate |
| CN207421800U (en) * | 2017-09-15 | 2018-05-29 | 上海根元环保科技有限公司 | A kind of luminous annulus |
| CN211344908U (en) * | 2019-09-02 | 2020-08-25 | 华为技术有限公司 | Annular lamp and electronic equipment |
| CN110671638A (en) * | 2019-09-02 | 2020-01-10 | 华为技术有限公司 | Annular lamp and electronic equipment |
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2019
- 2019-09-02 CN CN201910840722.0A patent/CN110671638A/en active Pending
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| US5555161A (en) * | 1995-09-11 | 1996-09-10 | Delco Electronics Corporation | Bi-functional light pipe and display assembly |
| CN102047156A (en) * | 2008-05-30 | 2011-05-04 | 皇家飞利浦电子股份有限公司 | Round illumination device |
| CN102414590A (en) * | 2009-04-24 | 2012-04-11 | 皇家飞利浦电子股份有限公司 | Luminaire with functionality-enhancing structure |
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| WO2021042973A1 (en) | 2021-03-11 |
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