CN107092052B - Light guide device and cosmetic mirror with same - Google Patents
Light guide device and cosmetic mirror with same Download PDFInfo
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- CN107092052B CN107092052B CN201710514359.4A CN201710514359A CN107092052B CN 107092052 B CN107092052 B CN 107092052B CN 201710514359 A CN201710514359 A CN 201710514359A CN 107092052 B CN107092052 B CN 107092052B
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- Prior art keywords
- light
- light guide
- guide device
- light emitting
- emitting
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G1/00—Mirrors; Picture frames or the like, e.g. provided with heating, lighting or ventilating means
- A47G1/02—Mirrors used as equipment
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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
- G02B6/0075—Arrangements of multiple light guides
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- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D42/00—Hand, pocket, or shaving mirrors
- A45D42/08—Shaving mirrors
- A45D42/10—Shaving mirrors illuminated
-
- 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
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
-
- 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
-
- 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
-
- 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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0095—Light guides as housings, housing portions, shelves, doors, tiles, windows, or the like
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G2200/00—Details not otherwise provided for in A47G
- A47G2200/08—Illumination
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Led Device Packages (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
A light guide device comprises a first light incidence end surface for receiving first light, a second light incidence end surface for receiving second light, a light emergent surface and a light reflecting surface arranged opposite to the light emergent surface; the light reflection surface is used for performing reflection operation on the first light and the second light, and the light emergent surface emits the first light and the second light after reflection operation. The invention also provides a cosmetic mirror with the light guide device. According to the light guide device and the cosmetic mirror with the light guide device, the light emitting bodies are respectively arranged at the two ends of the light guide body, so that light rays generated by the light emitting bodies are oppositely transmitted from the different ends of the light guide body, and the purpose of improving the uniformity of emergent light rays is achieved.
Description
Technical Field
The invention relates to a light guide device and a cosmetic mirror with the same.
Background
Cosmetic mirrors are used as required by every household. When cosmetic mirror is looked at, because the angle that needs look at the mirror is different, can cause local bright not enough, lead to the condition emergence of seeing clearly, and bright angle is generally fixed, consequently, when needs carry out different angles and watch, probably have the inhomogeneous phenomenon of light to the use that brings inconvenience for the user.
Disclosure of Invention
In view of the above, there is a need for a light guide device and a cosmetic mirror having the same, which can reduce the unevenness of light emission.
A light guide device comprises a first light emitting piece, a second light emitting piece, a first control circuit for controlling the first light emitting piece to emit first light, a second control circuit for controlling the second light emitting piece to emit second light and a light guide body; the light guide body comprises a first light incidence end surface for receiving first light, a second light incidence end surface for receiving second light, a light emergent surface and a light reflecting surface arranged opposite to the light emergent surface; the light reflection surface is used for performing reflection operation on the first light and the second light, and the light emergent surface emits the first light and the second light after reflection operation.
Further, in the light guide device, a plurality of scattering dots are provided on the light reflection surface.
Further, in the light guide device, the shape of the scattering dots is one or more of circular and wedge-shaped.
Further, in the light guide device, the density of the plurality of light scattering dots is changed along with the change of the distance from the light-emitting member.
Further, in the light guide device, the first light emitting element is disposed at the first light incident end surface, and the second light emitting element is disposed at the second light incident end surface; the first luminous element comprises one or two of warm light or cold light luminous elements with single color temperature, and the second luminous element comprises one or two of warm light or cold light luminous elements with single color temperature; alternatively, the first light emitting element includes one or more warm-light emitting elements of dual color temperature, and the second light emitting element includes one or more warm-light emitting elements of dual color temperature.
Further, in the light guide device, the light guide body includes the light reflection surface, a light exit surface disposed opposite to the light reflection surface, an inner side surface, and an outer side surface disposed opposite to the inner side surface; the light reflecting surface, the light emergent surface, the inner side surface and the outer side surface form a wedge-shaped section; wherein a length of the inner side surface in the wedge-shaped cross section is equal to a length of the outer side surface in the wedge-shaped cross section.
Further, in the light guide device, the light guide device further includes a light reflecting device, and the light reflecting device is disposed adjacent to a light reflecting surface of the light guide device.
Further, in the light guide device, a light exit surface of the light guide device is a convex arc shape or a concave arc shape.
A cosmetic mirror is characterized by comprising a mirror surface and a light guide device arranged along the circumferential direction of the mirror surface, wherein the light guide device comprises a first light-emitting piece, a second light-emitting piece, a first control circuit for controlling the first light-emitting piece to emit first light, a second control circuit for controlling the second light-emitting piece to emit second light and a light guide body; the light guide body comprises a first light incidence end surface for receiving first light, a second light incidence end surface for receiving second light, a light emergent surface and a light reflecting surface arranged opposite to the light emergent surface; the light reflection surface is used for performing reflection operation on the first light and the second light, and the light emergent surface emits the first light and the second light after reflection operation.
Further, in the cosmetic device, the cosmetic mirror further includes a light softening device, the light softening device includes a first receiving portion and a second receiving portion, the first receiving portion is used for receiving the mirror surface, and a light emitting portion of the light guide device is received in the second receiving portion.
Above-mentioned light guide device and have this light guide device's vanity mirror are through setting up the luminous body respectively at the both ends of leaded light body, and then make the light that the luminous body of distributor produced transmit in opposite directions by the not looks of leaded light body, reach the purpose that promotes the degree of consistency of emergent light. In addition, the light reflecting device is arranged on the light reflecting surface close to the light guide body, and the soft light device is arranged on the light emergent surface, so that the uniformity of emergent light rays is further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a light guide device according to a preferred embodiment of the present invention.
Fig. 2 is a schematic view of the connection relationship between the light emitting element and the light guiding body in fig. 1.
FIG. 3 is a block diagram of a preferred embodiment of the light guide device of FIG. 1 and a first cross-section thereof.
FIG. 4 is a schematic view of the light guide device of FIG. 1 and a second cross-section thereof according to a preferred embodiment.
Fig. 5 is a schematic diagram of an IES curve of the light guide apparatus of fig. 1.
Fig. 6 is a circuit diagram of a preferred embodiment of the control circuit in the control circuit board of fig. 1.
FIG. 7 is a block diagram of a preferred embodiment of the cosmetic mirror of the present invention.
Fig. 8 is an enlarged partial view of fig. 7 after assembly.
Description of the main elements
First incident end face 100
Second incident end face 102
First light emitting member 130
Second luminous element 140
Mirror 30
Heat sink 50
Heat conductive silica gel 505
Reflecting device 70
Second accommodating space 204
Abutting part 600
The following specific embodiments will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a detailed description of the present invention will be given below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, a light guide device 10 according to a preferred embodiment of the present invention includes a light guide body 110, a first light emitting element 130 located at a first end of the light guide body 110, and a second light emitting element 140 located at a second end of the light guide body 110. The first light emitting element 130 is configured to emit one or more first light rays, and the second light emitting element 140 is configured to emit one or more second light rays.
In this embodiment, the light guide body 110 may include a first light incident end surface 100 at a first end, a second light incident end surface 102 at a second end, a light emitting surface 104, and a light reflecting surface 106 opposite to the light emitting surface 104. The light reflecting surface 106 is used for reflecting the first light and the second light. In this embodiment, a part of the first light and/or the second light may be emitted from the light emitting surface 104 after being reflected by the light reflecting surface 106; another part of the first light and/or the second light can be transmitted along the propagation path where the light guide body 110 is located, for example, the first light can be transmitted from a first direction to a second direction along the propagation path where the light guide body 110 is located; the second light can be transmitted from the second direction to the first direction along the propagation path of the light guide body 110.
In this embodiment, the first light incident end surface 100 and the second light incident end surface 102 are disposed opposite to each other, so that a first light generated by the first light emitting element 130 located at the first end of the light guide body 110 and a second light generated by the second light emitting element 140 located at the second end of the light guide body 110 are mixed and overlapped on the propagation path of the light guide body 110, and the first light and the second light are emitted from the light emitting surface 104 to form a light source with uniform light emission.
It is understood that the first light emitting member 130 may include one or both of a warm or cool light emitting element of a single color temperature; the second luminous member 140 may include one or both of warm or cool light emitting elements of a single color temperature. Preferably, when the first light emitting element 130 and the second light emitting element 140 both include a warm light emitting element with a single color temperature, the light guide device 10 can form a light source of double warm lights. When the first and second light emitting members 130 and 140 include single color temperature luminescent light emitting elements, the light guide device 10 may form a light source of dual luminescence. In other embodiments, each of the first light emitting device 130 and the second light emitting device 140 may also include 2 warm light emitting devices. The number of the light emitting elements included in the first light emitting element 130 and the second light emitting element 140 can be increased or decreased according to actual needs, so as to meet the requirements of light sources under different conditions and scenes.
In other embodiments, the first light emitting element 130 may include one or more dual color temperature light emitting elements, and the second light emitting element 140 may include one or more dual color temperature light emitting elements, which are collocated or configured with light sources under different conditions and scenes.
Referring to fig. 2, the first light emitting element 130 and the second light emitting element 140 may include a lamp bead and a reflective cup. As an example, the first light emitting element 130 may include a bead 131 and a reflective cup 133. The lamp bead 131 is used for generating one or more first light rays, and the reflective cup 133 is substantially in an inverted cone shape and has an opening and a bottom. The light beads 131 are disposed at the bottom of the reflection cup 133, and the reflection cup 133 is configured to reflect one or more first light rays generated by the light beads 131, so that the first light rays generated by the light beads 131 enter the light guide body 110 from the opening and the first incident end face 100 as much as possible, thereby improving the utilization rate of the light source. Preferably, the one or more first light rays generated by the lamp beads 131 can be totally reflected in the reflective cup 133, so that the first light rays generated by the lamp beads 131 can be incident on the light guide body 110.
In other embodiments, a first lens (not shown) may be disposed between the first light emitting element 130 and the first incident end surface 100, and a second lens (not shown) may be disposed between the second light emitting element 140 and the second incident end surface 102, where the first lens and the second lens are used to diffuse incident light to enlarge an angle of the incident light, so that the distribution of the light entering the light guide body 110 is relatively uniform. Preferably, the first light generated by the first light emitting element 130 can be diffused by the first lens to generate a light with a larger incident angle, and similarly, the second light generated by the second light emitting element 140 can also be diffused by the second lens to generate a light with a larger incident angle.
The first and second light emitting members 130 and 140 are packaged by LEDs (single color temperature/double color temperature chips), so that the output luminous flux of the light emitting chip per unit area is high, the driving current density is high, and the effects of high color rendering and high brightness can be achieved. Of course, the color development and height of the first and second light emitting elements 130 and 140 can also be adjusted by the control circuit board 40 (shown in fig. 7).
The light reflecting surface 106 is further provided with a plurality of scattering dots 108. The shape of the scattering mesh point 108 can be one or more of circular and wedge-shaped. Understandably, circular scattering dots have isotropic scattering; the wedge-shaped scattering mesh point can properly compensate the dispersion. Therefore, different numbers of circular scattering dots or wedge-shaped scattering dots can be disposed on the light reflecting surface 106 according to implementation requirements.
In this embodiment, since the symmetric dual light sources (including the first light emitting element 130 and the second light emitting element 140) are adopted, the attenuation curves of the two light sources should satisfy the characteristic of symmetric attenuation, so that the superposition effect of the two light sources can obtain uniform output light.
Understandably, the attenuation curve for a single light source:
P(x)=P0e-cx
wherein C is the density of scattering dots. A uniform density may be used, taking into account process and processing considerations.
The maximum density of scattering dots is:
Cmax=lg(1-PC/P0)/xmax
wherein PC is the relation between the material transmission optical loss and the material, and xmax is the length of the light guide plate.
The smaller the size of the scatternet card, the better in principle. However, considering the process difficulty, the thickness is generally about 0.01 to 0.007mm.
In one embodiment, the density of the scattering dots 108 distributed on the light reflecting surface 106 may vary with the distance from the light source. Preferably, the distribution density of the scattering dots 108 can be smaller due to the larger luminous flux when the light emitting member is adjacent to the light emitting member; when the light guide device is far away from the light emitting element, the luminous flux is small, and the distribution density of the scattering dots 108 can be properly increased, so that the light emitted by the light guide device 10 is uniform, and the influence caused by the distance between the light guide device and the light emitting element can be reduced.
Referring to fig. 3, the light guide body 110 further includes an inner side 112 and an outer side 114. The inner side surface 112, the outer side surface 114, the light reflection surface 106 and the light emitting surface 104 of the light guide body 110 together form the propagation path. The light guide body 110 is substantially annular. In another embodiment, the inner side surface 112 and the outer side surface 114 may also be coated with a reflective material, so that the first light and/or the second light can be better emitted on the propagation path, so as to emit the first light and/or the second light from the light emitting end 104 as much as possible.
In another embodiment, a light reflection device 70 (shown in fig. 7) may be disposed adjacent to the light reflection surface 106 of the light guide body 110, and the light reflection device 70 may increase the reflection intensity of the first light and the second light, which is beneficial to reduce light loss and improve light utilization rate.
In this embodiment, the light guide body 110 has a substantially wedge-shaped cross section, and the length of the side of the cross section of the inner side surface 112 is greater than the length of the side of the cross section of the outer side surface 114, so that light can spread outward without being dazzled.
In this embodiment, the lamp beads 131 may be disposed near the light reflecting surface 106 of the light guide device 10, and in other embodiments, the lamp beads 131 may be disposed near the central axis of the cross section of the light guide body 110 or the narrow side of the wedge-shaped cross section.
Please refer to fig. 4, which is a schematic diagram of another cross-section of the light guide body 110 according to a preferred embodiment. The cross section of the light guide body 110 is substantially wedge-shaped, wherein the length of the side of the cross section where the inner side surface 112 is located is smaller than the length of the side of the cross section where the outer side surface 114 is located, so that the light guide path of the outer side surface 114 is long, and therefore needs to be thick, and can emit more light, and the light guide path of the inner side surface 112 is short, and therefore needs to be thin, so that the emitted light is emitted more uniformly from the light emitting surface 104.
In addition, the light emitting surface 104 of the light guide body 110 may be convex circular arc or concave circular arc. The emergent light can be distributed in space according to a specific light distribution curve, such as an IES curve (shown in figure 5) similar to a bat wing shape, and further, the light can be uniformly distributed on the face of a user within a range of 10 to 50cm away from a mirror surface (a general makeup range), and the glare value can be reduced.
Referring to fig. 6, 7 and 8, the preferred embodiment of the cosmetic mirror of the present invention includes a mirror 30, a light diffuser 20 for accommodating the mirror 30 and the light guide 10, a control circuit board 40 for controlling the color temperature and brightness of the light guide 10, a supporting device 60 for supporting the control circuit board 40, and a heat sink 50 for dissipating heat from the control circuit board 40.
The light diffuser 20 includes a first receiving space 202 and a second receiving space 204, the first receiving space 202 is used for receiving the mirror 30, and the second receiving space 204 is used for receiving the light guide device 10. The light diffuser 20 can fasten the mirror 30 to the first receiving space through a fastening portion, so that the mirror 30 is fixed in the first receiving space.
In this embodiment, the light softening device 20 is configured to soften the outgoing light of the light guide device 10, so that the outgoing light of the light guide device 10 is uniform and soft, and the glare value is also reduced. In this embodiment, the soft light device 20 may be an acrylic transparent with fog corrosion; in other embodiments, a toner that does not affect color development may be added between the light diffuser 20 and the light guide 10, or a diffuser may be added between the light guide 10 and the light diffuser 20.
The light reflecting device 70 is disposed adjacent to the light reflecting surface 106 of the light guiding body 110 to enhance the reflection intensity of the first light and the second light.
The light guide device 10 is substantially annular and has an opening 200, and the opening 200 forms the first incident end surface 100 and the second incident end surface 102.
The supporting member 60 is used for fixing the control circuit board 40 and the light reflecting device 106 with the light guide device 10 and the light softening device 20. In this embodiment, the number of the supporting members 60 may be two, each of the supporting members 60 includes an upward protruding abutting portion 600, two first light-emitting members 130 facing the first incident end surface 100 are disposed on the outer surface of the abutting portion 600 adjacent to the first incident end surface 100, and two second light-emitting members 140 facing the second incident end surface 102 are disposed on the outer surface of the abutting portion 600 adjacent to the second incident end surface 102, so that the light emitted from the first light-emitting members 130 and the light emitted from the second light-emitting members 140 can be incident on the light guide body 110 from the first incident end surface 100 and the second incident end surface 102, respectively.
In this embodiment, the control circuit board 40 may include a control circuit for adjusting the brightness of the first and second light emitting members 130 and 140.
In this embodiment, the first light emitted from the first light emitting element 130 can be adjusted by the first control circuit, and the second light emitted from the second light emitting element 140 can be adjusted by the second control circuit. The first control circuit and the second control circuit may be the same, and the first control circuit is exemplified in this embodiment.
The first control circuit may include a driving chip U1, a filter circuit, a peripheral circuit, and the first light emitting element 130. In this embodiment, the first light emitting device 130 includes two light emitting diodes, D2 and D3.
The driving chip U1 adjusts the voltage and/or current output to the first light emitting element 130 to achieve the purpose of adjusting the brightness thereof.
The driving chip U1 may include a voltage input pin VIN, a voltage output pin SW, a detection pin OV, a ground pin GND, a feedback pin FB, and a control pin CTRL.
The voltage input pin VIN is connected to a power supply 5V, and the power supply 5V is grounded through a capacitor C1.
The control pin CTRL receives a switching signal through a resistor R1 to control the brightness of the first light-emitting device in a first manner. The control pin CTRL is also coupled to ground via a pull-down resistor R2. The driving chip U1 may adjust the brightness of the first light emitting element 130 through a switching signal received by the control pin CTRL. In this embodiment, the switch signal may be a high-low level signal, and when the switch signal is a high-level signal, the driving chip U1 may increase the voltage or current of the power output pin SW to increase the brightness of the first light emitting device 130; when the switching signal is a low level signal, the driving chip U1 may reduce the power or circuit output by the power output pin SW, thereby achieving the purpose of reducing the brightness of the second light emitting element 130.
The voltage output pin SW is connected to the voltage input pin VIN through an inductor L1, and is also connected to an anode of a diode D1. The cathode of the diode D1 is grounded through the light emitting diodes D2 and D3 and the resistor R6 connected in series, and the cathode of the diode D1 is connected to the detection pin OV and also grounded through the capacitor C2. The ground pin GND is grounded.
The feedback pin FB is grounded through a capacitor C3 and is also connected to a node of the light emitting diode D3 and the resistor R6 through a resistor R5. The feedback pin FB also receives a control signal through a resistor R4 and a resistor R3 which are connected in series, and the node of the resistor R4 and the resistor R3 is also grounded through a capacitor C4.
In this embodiment, the driving chip U1 may control the brightness of the first light emitting device using the pulse signal as a second mode.
It is understood that the control signal may be a pulse signal, and the resistor R4 and the capacitor C4 may constitute the low-pass filter circuit. The low-pass filter circuit is used for performing low-pass filtering operation on the control signal, so that a feedback pin FB of the driving chip U1 receives a linear control signal. When a linear control signal is received, the driving chip U1 may linearly control the first light emitted by the first light emitting element 130, so that the output is more stable, and the stroboscopic light is lower on the premise of ensuring energy efficiency.
In this embodiment, the switching signal may be a 0 or 1 switching signal. For example, when the switching signal is 0, it indicates that the driving chip U1 is turned on
In this embodiment, the supporting member 60 may be an aluminum substrate, and the supporting member 60 may also be used for dissipating heat generated by the light emitting member.
The heat dissipation device 50 includes two heat dissipation fins 503. The two heat sinks 503 are respectively disposed on the sides of the two supporting members 60. In particular, the heat sink 503 may include a downwardly extending contact surface 505. The contact surface 505 of the heat sink 503 may contact with the side surface of the supporting member 60, and when the heat sink 503 contacts with the supporting member 60, the heat sink 503 is located below the corresponding light emitting member to dissipate heat generated by the light emitting member. The contact surface 505 of the heat sink 503 may be used to expand the heat dissipation area. In this embodiment, the heat dissipation device 50 further includes two heat conductive silicone rubbers 505. Each of the thermal conductive silicone gels 505 is disposed between the corresponding heat sink 503 and the supporting member 60 to transfer heat of the heat sink 503. In other embodiments, the heat dissipation device 50 may include only the heat dissipation fins 503, so that the heat dissipation fins 503 may directly contact with the corresponding support members 60 to dissipate heat. In this embodiment, through adopting aluminium base board and fin and heat conduction silica gel complex radiating mode, the heat that makes luminous original paper produce is derived as fast as possible, and the processing degree of difficulty and heat radiating area are compromise as follows to the structure. The heat sink material is a material with low thermal resistance, and can be aluminum or copper.
Above-mentioned light guide device and have this light guide device's vanity mirror are through setting up the luminous body respectively at the both ends of leaded light body, and then make the light that the luminous body of distributor produced transmit in opposite directions by the not looks of leaded light body, reach the purpose that promotes the degree of consistency of emergent light. In addition, the light reflecting device is arranged on the light reflecting surface close to the light guide body, and the light softening device is arranged on the light emergent surface, so that the uniformity of emergent light rays is further improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several units or systems recited in the system claims may also be implemented by one and the same unit or system in software or hardware.
Finally, it should be noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the same, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A light guide device is characterized by comprising a first light-emitting piece, a second light-emitting piece, a first control circuit for controlling the first light-emitting piece to emit first light, a second control circuit for controlling the second light-emitting piece to emit second light and a light guide body, wherein the first control circuit is connected with the first light-emitting piece; the light guide body comprises a first light incidence end surface for receiving first light, a second light incidence end surface for receiving second light, a light emergent surface and a light reflecting surface arranged opposite to the light emergent surface; the light reflection surface is used for reflecting the first light and the second light, the light emergent surface emits the first light and the second light after reflection operation,
the light guide device also comprises a first control circuit for controlling the first light-emitting component to emit first light; the first control circuit comprises a low-pass filter circuit and a driving chip, the low-pass filter circuit is used for filtering the pulse signal to output a linear control signal, the driving chip linearly adjusts the brightness of the first light-emitting component according to the linear control signal,
the driving chip comprises a voltage output pin and a feedback pin, the voltage output pin is connected to the anode of the light-emitting diode, and the cathode of the light-emitting diode is grounded through a first resistor; the feedback pin is connected to the cathode of the light emitting diode through a second resistor, the pulse signal is received through a third resistor and a fourth resistor which are connected in series, and nodes of the third resistor and the fourth resistor are grounded through a capacitor.
2. A light guide device in accordance with claim 1, wherein the light reflecting surface has a plurality of scattering dots thereon.
3. The light guide device of claim 2, wherein the plurality of scattering dots are one or more of circular and wedge-shaped.
4. The light guide device of claim 2, wherein the density of the plurality of light scattering dots varies as a function of distance from the light emitter.
5. A light guide device according to claim 1, wherein the first light emitting element is disposed at the first light incident end face and the second light emitting element is disposed at the second light incident end face; the first luminous element comprises one or two of warm light or cold light luminous elements with single color temperature, and the second luminous element comprises one or two of warm light or cold light luminous elements with single color temperature; alternatively, the first light emitting element includes one or more warm-light emitting elements of dual color temperature, and the second light emitting element includes one or more warm-light emitting elements of dual color temperature.
6. A light guide device according to any one of claims 1 to 5, wherein the light guide body comprises the light reflecting surface, a light exit surface disposed opposite to the light reflecting surface, an inner side surface, and an outer side surface disposed opposite to the inner side surface; the light reflecting surface, the light emergent surface, the inner side surface and the outer side surface form a wedge-shaped section; wherein a length of the inner side surface in the wedge-shaped cross section is equal to a length of the outer side surface in the wedge-shaped cross section.
7. A light guide device according to any one of claims 1-5 wherein the light guide device further comprises light reflecting means disposed adjacent a light reflecting surface of the light guide device.
8. A light guide device according to any one of claims 1 to 5, wherein the light exit surface of the light guide device is in the shape of a convex arc or a concave arc.
9. A cosmetic mirror, characterized in that it comprises a mirror surface and a light guide device according to claims 1-8 arranged along the perimeter of the mirror surface.
10. The mirror according to claim 9, further comprising a light softening device, wherein the light softening device comprises a first receiving portion and a second receiving portion, the first receiving portion is configured to receive the mirror surface, and the light emitting portion of the light guide device is received in the second receiving portion.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710514359.4A CN107092052B (en) | 2017-06-29 | 2017-06-29 | Light guide device and cosmetic mirror with same |
| GB1906085.4A GB2570072B (en) | 2017-06-29 | 2017-11-22 | Light guiding device and cosmetic mirror having same |
| KR1020197031622A KR102285336B1 (en) | 2017-06-29 | 2017-11-22 | Light guide device and makeup mirror provided therewith |
| AU2017421048A AU2017421048B2 (en) | 2017-06-29 | 2017-11-22 | Light guiding device and cosmetic mirror having same |
| JP2019556403A JP6862070B2 (en) | 2017-06-29 | 2017-11-22 | A light guide device and a makeup mirror equipped with the light guide device |
| PCT/CN2017/112213 WO2019000814A1 (en) | 2017-06-29 | 2017-11-22 | Light guiding device and cosmetic mirror having same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710514359.4A CN107092052B (en) | 2017-06-29 | 2017-06-29 | Light guide device and cosmetic mirror with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107092052A CN107092052A (en) | 2017-08-25 |
| CN107092052B true CN107092052B (en) | 2023-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710514359.4A Active CN107092052B (en) | 2017-06-29 | 2017-06-29 | Light guide device and cosmetic mirror with same |
Country Status (6)
| Country | Link |
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| JP (1) | JP6862070B2 (en) |
| KR (1) | KR102285336B1 (en) |
| CN (1) | CN107092052B (en) |
| AU (1) | AU2017421048B2 (en) |
| GB (1) | GB2570072B (en) |
| WO (1) | WO2019000814A1 (en) |
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|---|---|---|---|---|
| CN107092052B (en) * | 2017-06-29 | 2023-03-24 | 深圳市宗匠科技有限公司 | Light guide device and cosmetic mirror with same |
| CN111387683B (en) * | 2020-03-12 | 2023-02-03 | 橙景国际有限公司 | Cosmetic mirror with light-equalizing effect |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1549017A (en) * | 2003-05-21 | 2004-11-24 | 力捷电脑股份有限公司 | Sidelight type back light module and liquid crystal display device |
| DE102004042929A1 (en) * | 2004-09-02 | 2006-03-09 | Sam Schulte Gmbh + Comp. | Cosmetic mirror, has light conductor with gap in which light source e.g. light emitting diode, is arranged and arranged around mirror in ring shaped manner, where conductor obtains light from source to convey light to light emission area |
| JP4765897B2 (en) * | 2006-11-02 | 2011-09-07 | パナソニック株式会社 | Light guide for lighting device |
| CN101778507B (en) * | 2009-12-10 | 2013-06-12 | 海洋王照明科技股份有限公司 | LED control circuit |
| CN201706351U (en) * | 2010-03-27 | 2011-01-12 | 孙少珍 | Lamp fitting and projecting lamp for vehicle adopting the same |
| JP5300817B2 (en) * | 2010-10-18 | 2013-09-25 | 三菱電機株式会社 | Illumination light source and illumination device |
| CN202408047U (en) * | 2012-01-04 | 2012-09-05 | 刘国昌 | Mirror with LED (light-emitting diode) euphotic zone |
| CA3078447C (en) * | 2012-03-08 | 2022-05-10 | Simplehuman, Llc | Vanity mirror |
| US9347660B1 (en) * | 2013-11-17 | 2016-05-24 | Zlatko Zadro | Dual magnification illuminated multi-spectrum table mirror |
| TWM473114U (en) * | 2013-11-21 | 2014-03-01 | Global Lighting Technologies | Light guiding circle |
| CN104777546A (en) * | 2014-01-10 | 2015-07-15 | 堤维西交通工业股份有限公司 | Sectional light emitting and light guiding piece and lamp |
| CN204070994U (en) * | 2014-10-17 | 2015-01-07 | 梁银芳 | A kind of vanity mirror with light guide plate |
| JP2017103010A (en) * | 2015-11-30 | 2017-06-08 | アルプス電気株式会社 | Light-emitting element drive circuit and circuit device having the same |
| CN107092052B (en) * | 2017-06-29 | 2023-03-24 | 深圳市宗匠科技有限公司 | Light guide device and cosmetic mirror with same |
-
2017
- 2017-06-29 CN CN201710514359.4A patent/CN107092052B/en active Active
- 2017-11-22 WO PCT/CN2017/112213 patent/WO2019000814A1/en active Application Filing
- 2017-11-22 GB GB1906085.4A patent/GB2570072B/en active Active
- 2017-11-22 KR KR1020197031622A patent/KR102285336B1/en active IP Right Grant
- 2017-11-22 JP JP2019556403A patent/JP6862070B2/en active Active
- 2017-11-22 AU AU2017421048A patent/AU2017421048B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| GB2570072A (en) | 2019-07-10 |
| CN107092052A (en) | 2017-08-25 |
| GB2570072B (en) | 2022-07-13 |
| KR20200030028A (en) | 2020-03-19 |
| AU2017421048A1 (en) | 2019-06-13 |
| WO2019000814A1 (en) | 2019-01-03 |
| AU2017421048B2 (en) | 2020-07-16 |
| JP6862070B2 (en) | 2021-04-21 |
| GB201906085D0 (en) | 2019-06-12 |
| JP2020503659A (en) | 2020-01-30 |
| KR102285336B1 (en) | 2021-08-03 |
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