CN110319375B - Lighting device - Google Patents
Lighting device Download PDFInfo
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- CN110319375B CN110319375B CN201810297118.3A CN201810297118A CN110319375B CN 110319375 B CN110319375 B CN 110319375B CN 201810297118 A CN201810297118 A CN 201810297118A CN 110319375 B CN110319375 B CN 110319375B
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- Prior art keywords
- light
- emitting surface
- lighting device
- light guide
- guide plate
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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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- 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
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
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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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
- F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
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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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
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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
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
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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
- F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to the field of illumination, in particular to a light guide plate illuminating device. The invention provides a lighting device, which is arranged on a lighting device installation part and comprises: the light guide plates are respectively provided with a light incident surface and a plurality of light emergent surfaces, the light incident surfaces of the light guide plates are arranged in the same plane, and the light incident surfaces of the light guide plates are opposite to each other or arranged in the same plane; the fixed bracket is combined and connected with the light guide plate and is connected with the lighting device mounting part; the LED chip mounting parts correspond to the light incident surfaces of the light guide plates respectively, and are arranged on the fixed support in a mode that the LED chips mounted on the LED chip mounting parts face the light incident surfaces; and the optical point is arranged on the first light-emitting surface or the second light-emitting surface and reflects part of light rays emitted into the light guide plate by the LED chip to the light-emitting surface, wherein the luminous flux in the direction of one side of the first light-emitting surface of the light guide plate is different from the luminous flux in the direction of one side of the second light-emitting surface of the light guide plate.
Description
Technical Field
The invention relates to the field of illumination, in particular to an illumination device using a light guide plate.
Background
An LED (Light Emitting Diode) is a semiconductor device that can convert electric energy into visible Light. The LED lighting product is a semiconductor solid-state light emitting device. The LED is a solid semiconductor chip LED used as a luminescent material, and the light emitting material emits red, yellow, blue, green, cyan, orange, purple and white light directly by emitting excess energy through carrier recombination in a semiconductor. LED lighting devices are an emerging industry that has developed in recent years that requires only very small currents to excite light at a relatively high brightness.
With the popularization of LED lighting products, simple basic lighting can not meet the requirements of people, and LED lamps with uniform light emission, unique shapes and strong design sense are more and more favored by the market.
Patent document CN206582710U discloses a lighting fixture that emits light toward an illumination target located below a ceiling, and fig. 1 is a perspective view of this conventional lighting fixture, and as shown in fig. 1, the lighting fixture includes a light source unit and a light guide plate, the light guide plate has a main surface and an end portion facing the ceiling, light emitted from the light source unit is incident on an end surface of the end portion of the light guide plate, and a recess for reflecting light incident from the end surface toward the illumination target to realize illumination directly below the lighting fixture is formed in the main surface of the light guide plate. Specifically, the lighting fixture emits light toward an illumination target located below a ceiling, specifically, a floor surface, a table top surface, or the like.
However, in the above-described lighting fixture of the related art, the light emitted from the light source unit is reflected by the light guide plate, and thus only the area directly below the lighting fixture can be illuminated, and when the light is separated from the area and the area directly below the lighting fixture, a dark area is generated, and thus, the lighting fixture cannot achieve a directional illumination with a wider illumination range.
Disclosure of Invention
In order to solve the problem that the prior art can only illuminate the area right below the lighting apparatus and can not realize directional illumination for wider range and space, the invention provides a lighting device which is arranged on a lighting device installation part and comprises:
the light guide plates are respectively provided with a light incident surface and a plurality of light emergent surfaces, the light emergent surfaces comprise a first light emergent surface close to the lighting device mounting part, a second light emergent surface far away from the lighting device mounting part and a side light emergent surface connecting the first light emergent surface and the second light emergent surface, the first light emergent surface and the second light emergent surface are parallel to each other, the at least two light guide plates are arranged in the same plane, and the light incident surfaces of the at least two light guide plates are arranged oppositely or arranged in the same plane;
the fixed bracket is combined and connected with the light guide plate and is connected with the lighting device mounting part;
the LED chip mounting parts correspond to the light incident surfaces of the light guide plates respectively, and are arranged on the fixed support in a mode that the LED chips mounted on the LED chip mounting parts face the light incident surfaces;
the optical point is arranged on the first light-emitting surface or the second light-emitting surface and partially reflects the light rays emitted into the light guide plate by the LED chip to the first light-emitting surface, the second light-emitting surface and the side light-emitting surface;
wherein, the luminous flux in the direction of the first light-emitting surface side of the light guide plate is different from the luminous flux in the direction of the second light-emitting surface side of the light guide plate.
In the invention, the light rays emitted by the LED chips enter the light guide plate from the light incident surface of the light guide plate, when a part of the light rays are incident to the optical points of the first light emitting surface or the second light emitting surface, the light rays are directly emitted or reflected and scattered to irradiate in different directions and are emitted from the light emitting surface, meanwhile, a part of the light rays are firstly incident to the light emitting surface without the optical points and then are reflected to the optical points of the first light emitting surface or the second light emitting surface of the light guide plate, the reflection and scattering are completed, and a surface light source is formed on the first light emitting surface and the second light emitting surface. The luminous fluxes emitted by the light rays after passing through the optical point and emitted by the light rays after being reflected and scattered are different, so that the luminous fluxes of the first light-emitting surface and the second light-emitting surface of the light guide plate can be controlled to be different by arranging the optical point, and the light-emitting effect directivity adjustment of the lighting device in the direction of the first light-emitting surface or the second light-emitting surface is realized.
Because the first light-emitting surface and the second light-emitting surface are parallel to each other and are provided with the side light-emitting surface connecting the first light-emitting surface and the second light-emitting surface, part of light rays emitted by the LED chips are emitted from the side light-emitting surface, so that the illumination in the light-emitting direction different from that of the first light-emitting surface and the second light-emitting surface is realized, the illumination device can realize the illumination in the direction opposite to the first light-emitting surface or the second light-emitting surface through a surface light source formed by the first light-emitting surface and/or the second light-emitting surface, and the illumination in a larger area with directivity is realized by utilizing the light-emitting of the side light-emitting surface.
In the invention, the luminous flux in the direction of one side of the first light-emitting surface of the light guide plate is greater than the luminous flux in the direction of one side of the second light-emitting surface of the light guide plate; or the luminous flux in the direction of the first light-emitting surface of the light guide plate is smaller than the luminous flux in the direction of the second light-emitting surface of the light guide plate.
Most of the light entering the light guide plate changes the original path by utilizing the uneven surface formed on the light-emitting surface due to the existence of the optical points, so that the light is emitted from the first light-emitting surface and the second light-emitting surface. Therefore, the luminous fluxes of the first light-emitting surface and the second light-emitting surface can be controlled by arranging the optical points, and the luminous flux in the direction of one side of the first light-emitting surface of the light guide plate is larger than that in the direction of one side of the second light-emitting surface; or the luminous flux in the direction of the first light-emitting surface of the light guide plate is smaller than the luminous flux in the direction of the second light-emitting surface of the light guide plate. Meanwhile, the light beam axis of the light guide plate side surface light source deflects to the direction of one side of the second light emitting surface or the direction of one side of the first light emitting surface, and the light flux in the direction of one side of the second light emitting surface is adjusted to be larger than or smaller than the light flux in the direction of one side of the first light emitting surface. Through the setting of the optical point on the light-emitting surface of the light guide plate, the light-emitting of the light-emitting surface on the side surface is combined, so that the luminous flux in the direction of one side of the first light-emitting surface is different from the luminous flux in the direction of one side of the second light-emitting surface, the luminous flux towards one side of the installation part of the lighting device is larger, or the luminous flux away from one side of the installation part of the lighting device is larger according to the requirement of light distribution of the environment, and the design freedom degree and the light distribution directivity of the lighting device are improved.
Preferably, the side light-emitting surface includes a third light-emitting surface opposite to the light-incident surface, and a fourth light-emitting surface connecting the third light-emitting surface and the light-incident surface.
Among the light rays emitted by the LED chip and entering the light guide plate, part of the light rays directly exit from the third light exit surface, which is a plane opposite to the light incident surface, or exit from the third light exit surface after being totally reflected inside the light guide plate. Meanwhile, part of light rays emitted by the LED chip and entering the light guide plate change directions through scattering of the optical points and are emitted from the fourth light-emitting surface, so that the side light-emitting surface is formed into a multi-edge and multi-direction light-emitting surface comprising the third light-emitting surface and the fourth light-emitting surface, and directional illumination in more directions and a larger area can be realized.
Preferably, at least part of the third light-emitting surface or the fourth light-emitting surface is a curved surface.
The third light-emitting surface or the fourth light-emitting surface is partially or completely arranged to be a curved surface, so that the area of the light-emitting surface can be increased through the curved surface, the luminous flux is correspondingly increased, meanwhile, the design of the curved surface enables the light-emitting of each side light-emitting surface to be more uniform while the appearance is attractive, and the light distribution in the direction of the side light-emitting surface can be better realized.
Preferably, the lighting device provided by the invention further comprises a light emitting part arranged between the at least two light guide plates and connected with the fixed support. The light-emitting part comprises at least one LED chip group, and a plurality of LED chips mounted on the LED chip group face away from the direction of the lighting device mounting part.
Light-emitting portion can provide the light source different with light guide plate light-emitting mode, realize the demand of diversified light-emitting, locate it between two piece at least light guide plates simultaneously, the mode setting that deviates from the lighting device installation department with a plurality of LED chips orientation on the light-emitting portion LED chipset, make the light that jets out from light-emitting portion, can strengthen lighting device and be corresponding to the illuminating effect of fixed bolster part between two light guide plates, make the whole light-emitting symmetry of lighting device even. The light emitting part is matched with the light guide plate, so that the control and allocation of light emitting effects in different directions can be met.
Preferably, each light guide plate corresponds to at least one LED chip mounting portion, and each LED chip mounting portion is connected to the control unit.
The control unit controls the LED chip mounting part, the switch and the brightness of the LED chip mounted on the LED chip mounting part can be adjusted, and light entering the light guide plate can be adjusted, so that the light guide plate is controlled respectively, and different light distributions are formed according to a use scene.
Preferably, the side light-emitting surface is an inclined surface, and an included angle between the side light-emitting surface and the first light-emitting surface is smaller than an included angle between the side light-emitting surface and the second light-emitting surface or an included angle between the side light-emitting surface and the first light-emitting surface is larger than an included angle between the side light-emitting surface and the second light-emitting surface.
The side light-emitting surface is arranged to be the inclined surface, the light-emitting direction of the surface light source formed by the side light-emitting surface can be adjusted, the light-emitting area of the side light-emitting surface can be increased by forming the inclined surface, and the lighting effect of the side light-emitting surface is correspondingly enhanced. The included angle between the side light-emitting surface and the first light-emitting surface is smaller than the included angle between the side light-emitting surface and the second light-emitting surface, so that the luminous flux in the direction of the side of the second light-emitting surface far away from the lighting device mounting part is increased, and the lighting effect of the side far away from the lighting device mounting part is enhanced. In a similar way, the included angle between the side light-emitting surface and the first light-emitting surface is larger than the included angle between the side light-emitting surface and the second light-emitting surface, so that the luminous flux in the direction of the first light-emitting surface close to the lighting device mounting part is increased, and the light-emitting effect of the light guide plate in different directions is differentially regulated and controlled.
Preferably, an included angle between the light incident surface and the fourth light emitting surface is a chamfer.
Because the luminous flux on the unit area of the side light-emitting surface is large, the included angle between the light-in surface and the fourth light-emitting surface is set to be the chamfer, the light-emitting area of the fourth light-emitting surface can be increased, the lighting effect of the lighting device in the direction of the fourth light-emitting surface is enhanced to a certain extent, and importantly, the lighting device has light rays emitted towards the direction of the light-in surface, so that the directional lighting in more directions is realized. Meanwhile, the light emitting direction of the part can be adjusted by adjusting the inclination angle of the chamfer so as to meet different light distribution schemes. In addition, the chamfer is arranged, so that the light guide plate is convenient to be assembled and connected with the fixed support.
Preferably, the light incident surfaces of the plurality of light guide plates are arranged on the same plane, and one end of each light guide plate close to the light incident surface is provided with an arc part which can make light rays totally reflected at the part.
The light incident surfaces of the light guide plates are arranged on the same plane, so that the LED chip installation parts corresponding to the light incident surfaces of the light guide plates can be located on the same plane, the number of parts is reduced, the process difficulty is reduced, the production cost is saved, meanwhile, light rays generated by the LED chips can be reflected in the light guide plates for multiple times, one end, close to the light incident surfaces, of the light guide plates is arranged to be an arc-shaped part, and the light guide plates can effectively emit light.
Preferably, the LED chip mounting portion is provided with a metal heat sink.
The centralized arrangement of the LED chips can increase the temperature of the LED chip mounting part, so that the metal heat dissipation plate is arranged on the LED chip mounting part, the heat generated by the light emission of the LED chips is dissipated in time, the damage of the LED chip mounting part due to overhigh temperature is avoided, and the service life of the lighting device is prolonged.
Preferably, the LED chip mounting part is a PCB.
The PCB can conveniently arrange and combine the LED chips, and the LED chip luminous areas in different arrangements can be formed as required by utilizing the circuit design printed on the PCB, so that regional control of the incident light brightness is realized.
Preferably, the plurality of light guide plates are made of Polymethylmethacrylate (PMMA), synthetic resin, acryl, Polycarbonate (PC), polyester, polyolefin, or glass.
The light emitted by the LED chip is incident into the light guide plate from the incident surface, the transmission loss of the light is determined by the absorption degree of the light by the light guide plate material, and therefore, the medium with high light transmittance, such as polymethyl methacrylate (PMMA), synthetic resin, propylene, Polycarbonate (PC), polyester, polyolefin or glass, is adopted, the loss of the light in the transmission process can be reduced, and the light emitting effect of the lighting device is fully enhanced.
Drawings
FIG. 1 is a schematic view of a prior art lighting fixture;
fig. 2 is a schematic view of the overall structure of a lighting device according to a first embodiment of the present invention;
FIG. 3 is a partial structural view of a lighting device according to a first embodiment of the present invention;
fig. 4 is a schematic view of the overall structure of the lighting device according to the first embodiment of the present invention;
FIG. 5 is a partial schematic view of a lighting device according to a second embodiment of the present invention;
FIG. 6 is a partial schematic view of a lighting device according to a third embodiment of the present invention;
FIG. 7 is a partial schematic view of a lighting device according to a fourth embodiment of the present invention;
FIG. 8 is a partial structural view of a lighting device according to a fifth embodiment of the present invention;
FIG. 9 is a partial schematic view of a lighting device according to a sixth embodiment of the present invention;
fig. 10 is a partial structural schematic view of a lighting device according to a seventh embodiment of the present invention.
Description of the reference numerals
A. The LED lighting device comprises a lighting device body, a light guide plate 1, a light incoming surface 11, a light outgoing surface 12, a first light outgoing surface 121, a second light outgoing surface 122, a side light outgoing surface 12a, a third light outgoing surface 123, a fourth light outgoing surface 124, a fixing support 2, an LED mounting portion 3, an optical point 4, a light outgoing portion 5 and an arc portion 6.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Example one
A first embodiment of the present invention provides a lighting device, fig. 2 is a schematic view of an overall structure of the lighting device according to the first embodiment of the present invention, and fig. 3 is a schematic view of a partial structure of the lighting device according to the first embodiment of the present invention. Referring to fig. 2 to 3, the lighting device a provided in this embodiment is mounted on a lighting device mounting portion, and includes two light guide plates 1, where the light guide plates 1 respectively have a light incident surface 11 and a plurality of light emitting surfaces 12, each of the light emitting surfaces includes a first light emitting surface 121 close to the lighting device mounting portion, a second light emitting surface 122 far away from the lighting device mounting portion, and a lateral light emitting surface 12a connecting the first light emitting surface 121 and the second light emitting surface 122, the first light emitting surface 121 and the second light emitting surface 122 are parallel to each other, and the light incident surface 11 is perpendicular to the first light emitting surface 121 and the second light emitting surface 122. Two light guide plates 1 are arranged in the same plane, the light incident surfaces 11 are arranged oppositely, the light incident surfaces are connected to the installation part of the lighting device through a fixed support 2 in a combined mode, the two sides of the fixed support 2 are symmetrically arranged, clamping grooves corresponding to the light guide plates 1 are formed in the fixed support 2, the light guide plates 1 are clamped with the clamping grooves respectively, the light guide plates 1 are detachably connected with the fixed support, and the lighting device is convenient to assemble and replace. The light incident surfaces 11 of the two light guide plates 1 are respectively provided with an LED chip mounting part 3, the LED chip mounting parts in this embodiment are PCBs, a plurality of LED chips 31 mounted thereon respectively face the respective light incident surfaces 11, and the two LED chip mounting parts 3 are both disposed on the fixing bracket. The first light emitting surface 121 is provided with optical dots 4, which can destroy the total reflection of the light incident from the LED chip 31 into the light guide plate 1, so that the light can be emitted from the first light emitting surface 121, the second light emitting surface 122 and the side light emitting surface 12a, and the light flux in the direction toward the first light emitting surface 121 side of the light guide plate is different from the light flux in the direction toward the second light emitting surface 122 side of the light guide plate.
After the light emitted from the LED chips 31 enters the light guide plate 1 through the light incident surface 11, part of the light incident on the optical point 4 is damaged by total reflection and directly emitted from the first light emitting surface 121, or reflected and scattered to irradiate in different directions, and is emitted from the second light emitting surface 122 and emitted from the side light emitting surface 12a after being reflected and scattered for multiple times, meanwhile, part of the light is incident on the second light emitting surface 122 without the optical point 4 and then reflected to the optical point of the first light emitting surface 121, and the above reflection and scattering are completed, so that a surface light source is formed on the first light emitting surface 121 and the second light emitting surface 122. By arranging the optical dots 4 and adjusting the shape, size, distribution density and other parameters of the optical dots, part of the light beams are emitted from the first light emitting surface 121 and the second light emitting surface 122 respectively, and the second light emitting surface 122 has a larger luminous flux than the first light emitting surface 121, so as to form a brighter surface light source, the relative position of the LED chip and the light guide plate can be slightly adjusted, or the light beam axis of the surface light source on the light guide plate side is deflected to the direction of the second light emitting surface side by using the reflection of a side wall, for example, so that the luminous flux in the direction of the second light emitting surface side is larger than that in the direction of the first light emitting surface side, so as to realize the light emitting brightness adjustment of the illumination device in the directions of the first light emitting surface 121 and the second light emitting surface 122, and to realize the area illumination with directivity.
In this embodiment, the side light-emitting surface 12a further includes a third light-emitting surface 123 and a fourth light-emitting surface 124. The third light emitting surface is a plane facing the light incident surface 11, and the fourth light emitting surface 124 is two planes connecting the third light emitting surface 123 and the light incident surface 11. Among the light rays entering the light guide plate 1 from the light incident surface, a part of the light rays directly exits from the third light emitting surface 123 which is a plane opposite to the light incident surface 11 or exits from the third light emitting surface 123 after being totally reflected in the light guide plate, and a part of the light rays also exits from the fourth light emitting surface 124 after being scattered and changed in direction by the optical point 4, so that the side light emitting surface 12a is formed into a multi-sided and multi-directional light emitting surface including the third light emitting surface 123 and the fourth light emitting surface 124, thereby realizing illumination in the light emitting direction different from the first light emitting surface 121 and the second light emitting surface 122, allowing the lighting device to pass through a surface light source formed by the first light emitting surface 121 and/or the second light emitting surface 122, and combining the light emitting from the side light emitting surface, so that the luminous flux in the direction of the first light emitting surface is different from the luminous flux in the direction of the second light emitting surface, and the light emitting surface can be distributed according to the needs of the environment, the luminous flux towards the side of the lighting device installation part is larger, or the luminous flux far away from the side of the lighting device installation part is larger, directional lighting in more directions and in a larger area can be realized, and the design freedom degree and the light distribution directivity of the lighting device are improved.
In addition, the metal heat dissipation plate is arranged on the LED chip mounting portion 3, and the centralized arrangement of the LED chips 31 can raise the temperature of the LED chip mounting portion 3, so that the metal heat dissipation plate is arranged on the LED chip mounting portion 3, heat generated by the light emitting of the LED chips 31 is dissipated in time, damage to the LED chip mounting portion 3 due to overhigh temperature is avoided, and the service life of the lighting device is prolonged.
The LED chip mounting parts 3 respectively corresponding to the two light guide plates 1 are respectively connected with the control unit, the control unit controls the LED chip mounting parts 3 to adjust the brightness of the LED chips 31 mounted on the LED chip mounting parts, so that light rays entering the light guide plates are variable, and therefore the light flux of each light emitting surface of the light guide plates is controlled to form different surface light sources.
The light guide plate 1 of the lighting device provided in this embodiment is made of a resin material having high light transmittance, such as polymethyl methacrylate (PMMA), synthetic resin, acryl, Polycarbonate (PC), polyester, polyolefin, or glass, and reduces loss of light during transmission, and sufficiently converts light emitted from the LED chip 31 into a surface light source, and effectively disperses the light.
The lighting device that this embodiment provided can regard as ceiling lamp to use, can provide the area source towards all directions from the top with its fixed connection on the top wall body, mainly strengthened the luminance that provides downwards simultaneously, satisfies daily use needs. The lighting device provided in this embodiment can also be used as a wall lamp, as shown in fig. 4, at this time, the optical point 4 is formed on the second light emitting surface 122 far from the side wall, so that the luminous flux of the first light emitting surface 121 near the wall can be increased, the lighting effect of the wall can be enhanced, and the lighting device can also be obliquely arranged, so as to realize the different lighting effects in different wall areas. In addition, the embodiment is described by taking two light guide plates as an example, and a plurality of light guide plates can also implement the invention according to the structure described in the embodiment.
Example two
A lighting device is provided in a second embodiment of the present invention, and fig. 5 is a schematic view of the overall structure of the lighting device in the second embodiment of the present invention. The second embodiment is a further improvement of the first embodiment, and the main improvement is that, in the second embodiment of the present invention, as shown in fig. 5, the lighting device a further includes a light emergent portion 5 disposed between the two light guide plates 1, the light emergent portion 5 is substantially rectangular, and is equivalent to the light guide plates 1 in the length direction, and is connected with the fixing bracket 2, while maintaining the symmetrical design of the lighting device.
Light-emitting portion includes a LED chipset, and the LED chipset is arranged on the fixed bolster along 5 length direction of light-emitting portion, and a plurality of LED chips 31 of installation on it set up towards deviating from lighting device installation department direction, make light-emitting portion 5 towards the direction light-emitting that deviates from the lighting device installation department to this strengthens lighting device A and is corresponding to the illuminating effect of fixed bolster 2 parts between two light guide plates 1, makes the whole light-emitting symmetry of lighting device A even. The light outlet part 5 also comprises an arc-shaped lampshade, and a light inlet of the lampshade can cover all the LED chip groups to prevent the LED chip groups from leaking outside, so that the LED chip groups are effectively protected, and meanwhile, light rays generated by the LED chip groups provide light sources downwards in a more uniform and soft mode. Transparent PC shell can be chooseed for use to the lamp shade, its light transmission performance is high, can see inside LED chipset, also can choose translucent dull polish shell for use, its light shines out softly, it is comparatively dispersed that light portion 5 sends out to be different with 1 light-emitting mode of light guide plate, there is certain restriction in the direction, the direction of a plurality of LED chips 31 orientation is the light-emitting direction of light portion 5 promptly, when using as ceiling lamp, can the great area certain region of downwards illuminating. Light-emitting portion 5 can provide the area source different with 1 light-emitting mode of light guide plate, realize the demand of diversified light-emitting, locate it simultaneously and can make lighting device whole be the symmetric design between two piece at least light guide plates, eliminate the dark space corresponding to 2 parts of fixed bolster for lighting device A whole light-emitting is more even comfortable, light-emitting portion 5 and light guide plate 1 cooperate each other, can satisfy the control and the allotment of light-emitting effect on the equidirectional.
EXAMPLE III
A lighting device is provided in a third embodiment of the present invention, and fig. 6 is a partial structural schematic view of the lighting device in the third embodiment of the present invention. The third embodiment is a further improvement of the first and second embodiments, and the main improvement is that, in the third embodiment of the present invention, referring to fig. 6, the third light emitting surface 123 is an inclined surface, and an included angle between the inclined surface and the first light emitting surface 121 is smaller than an included angle between the inclined surface and the second light emitting surface 122.
A part of the light entering the light guide plate 1 is diffused and reflected by the optical points to be emitted from the first light emitting surface 121, the second light emitting surface 122 and the side light emitting surface 12a, so as to form a light emitting surface source, and meanwhile, a part of the light entering the light guide plate 1 is directly emitted from the third light emitting surface 123 which is a plane opposite to the light incident surface 11 without passing through the optical points 4, or is emitted from the third light emitting surface 123 after being totally reflected inside the light guide plate 1, so that the surface source formed by the third light emitting surface 123 simultaneously includes the light emitted by the diffused reflection of the light rays by the optical points 4, and the light emitted by the light directly emitted and totally reflected, so that the light flux of the unit area of the third light emitting surface 123 is larger than the light fluxes of the unit areas of the other side light emitting surfaces 12a and the second light emitting surface 122.
The third light emitting surface 123 is a smooth inclined surface gradually inclined towards the inside of the light guide plate 1 from the first light emitting surface 121 to the second light emitting surface 122, and the light emitting direction of the surface light source formed by the third light emitting surface 123 is adjusted, so that when the light guide plate is used as a ceiling lamp installed on a top wall, more light can be provided downwards to meet daily use requirements. Meanwhile, the inclined surface can increase the light emitting area of the side light-emitting surface 12a, and accordingly the illumination effect of the side light-emitting surface 12a is enhanced.
In this embodiment, the included angle between the third light emitting surface 123 and the first light emitting surface 121 is smaller than the included angle between the third light emitting surface and the second light emitting surface 122, the luminous flux of the second light emitting surface 122 itself is slightly reduced, but the luminous flux in the direction of the second light emitting surface 122 away from the lighting device mounting portion is increased, so that the lighting effect on the side away from the lighting device mounting portion is enhanced, and the fourth light emitting surface 124 can also be arranged in this way. Similarly, the included angle between the side light-emitting surface 12a and the first light-emitting surface 121 is larger than the included angle between the side light-emitting surface 12a and the second light-emitting surface 122, so that the luminous flux in the direction of the first light-emitting surface close to the lighting device mounting portion is increased, and the light-emitting effect of the light guide plate in different directions is differentially regulated and controlled.
Example four
A lighting device is provided in a fourth embodiment of the present invention, and fig. 7 is a partial structural schematic diagram of the lighting device in the fourth embodiment of the present invention. The fourth embodiment is a further improvement of the first to third embodiments, and the main improvement is that, in the fourth embodiment of the present invention, referring to fig. 7, an included angle between the light incident surface 11 and the fourth light emitting surface 124 is a chamfer. Because the light flux on the unit area of the side light-emitting surface 12a is relatively large, the included angle between the light-incident surface 11 and the fourth light-emitting surface 124 is set to be a chamfer, the area of the first light-emitting surface 121 and the area of the second light-emitting surface 122 are slightly reduced, but the light-emitting area of the fourth light-emitting surface can be increased, the lighting effect of the lighting device in the direction of the fourth light-emitting surface is enhanced to a certain extent, and importantly, the lighting device has the light rays emitted towards the direction of the light-incident surface 11, so that directional lighting in more directions is realized. Meanwhile, the inclination angle of the chamfer can be adjusted to gradually reduce the chamfer surface from the first light emitting surface 121 to the second light emitting surface 122, so that the chamfer surface emits light in the direction consistent with the light emitting direction of the second light emitting surface 122, thereby meeting different light distribution schemes. Similarly, the included angles between the light-emitting surfaces 12a on the side surfaces of the light guide plate 1 can be arranged accordingly. In addition, the chamfer reduces the area of one end of the light guide plate 1, and is convenient for the assembly and connection of the light guide plate 1 and the fixed support 2.
EXAMPLE five
A fifth embodiment of the present invention provides a lighting device, and fig. 8 is a partial structural schematic diagram of the lighting device according to the fifth embodiment of the present invention. The fifth embodiment is a further improvement of the first to fourth embodiments, and the main improvement is that, in the fifth embodiment of the present invention, referring to fig. 8, the light incident surfaces 11 of the two light guide plates are disposed on the same plane, and one end of the light guide plate 1 close to the light incident surface 11 is disposed as an arc-shaped portion 6 that can make the light totally reflected at the portion. The light incident surface 11 of the light guide plate 1 is parallel to the first light emitting surface 121 and the second light emitting surface 122 of the light guide plate 1, and the arc portion 6 connects the light incident surface 1 with the first light emitting surface 121 and the second light emitting surface 122. The curvature of the arc-shaped portion 6 is to ensure that the light entering from the light incident surface 11 is totally reflected at the portion and enters the light guide plate 1 between the first light emitting surface 121 and the second light emitting surface 122, so that the lighting device can emit light effectively.
The same plane is arranged in with the income plain noodles of two light guide plates 1, can make the LED chip installation department 3 that goes into plain noodles 11 corresponding to each light guide plate 1 be located the same plane, and a plurality of LED chips 31 of installation on it set up towards the same direction, can arrange on the same base plate, the part number has been reduced, but integrated into one piece during production, the metal cooling panel that is equipped with on the LED chip installation department simultaneously can give off the heat towards the same direction, the more efficient reduces the temperature of LED chip installation department 3, and the technology degree of difficulty of LED chip installation department reduces, and the production cost is saved.
EXAMPLE six
A lighting device is provided in a sixth embodiment of the present invention, and fig. 9 is a partial structural schematic view of the lighting device in the sixth embodiment of the present invention. The sixth embodiment is a further improvement of the first to fifth embodiments, and is mainly characterized in that, in the sixth embodiment of the present invention, as shown in fig. 9, the lighting device includes three arc-shaped light guide plates 1, the third light emitting surface 123 and the light incident surface 11 of the light guide plates 1 are curved surfaces, the three light guide plates 1 are placed in the same plane and are spliced into a circular ring shape, the third light emitting surface 123 of each light guide plate 1 is spliced into an outer large circle, the light incident surface 11 of each light guide plate 1 is spliced into an inner small circle, and the LED chip mounting portions 3 corresponding to the light incident surfaces 11 of the light guide plates 1 are also set into a curved surface, the LED chips 31 mounted thereon face the respective light incident surfaces 11, and a gap is left between the light guide plates 1, so that the surface light source of the fourth light emitting surface 124 can irradiate the outside. In addition, the light emergent portion 5 with the same or approximately the same shape as the region can be arranged in the region where the light incident surfaces 11 of the light guide plates 1 are spliced into the inner circle, so that different light emergent modes are provided for the lighting device.
The light flux on the third light emitting surface 123 opposite to the light incident surface 11 is the largest per unit area, and the area of the light emitting surface can be increased by setting the third light emitting surface 123 as a curved surface, and meanwhile, the light flux is correspondingly increased, so that the light distribution of the lighting device in different light emitting directions corresponding to different light emitting surfaces can be adjusted.
EXAMPLE seven
A seventh embodiment of the present invention provides a lighting device, and fig. 10 is a partial structural schematic diagram of the lighting device according to the seventh embodiment of the present invention. The seventh embodiment is a further improvement of the first to fifth embodiments, and is mainly improved in that, in the seventh embodiment of the present invention, as shown in fig. 10, the lighting device includes four rectangular light guide plates 1 with the same size, the four light guide plates 1 are located in the same plane and are spliced into a rectangle, the mutually opposite surfaces of the light guide plates 1 are respective light incident surfaces 11, the LED chip mounting portions 3 are provided to correspond to the respective light incident surfaces, and the plurality of LED chips 31 mounted thereon face the respective light incident surfaces 11. At this time, the side light emitting surfaces are all the third light emitting surfaces 123, and an included angle between the third light emitting surface 123 and the light incident surface 11 of each light guide plate 1 is set to be a chamfer, so that the illumination effect of the third light emitting surface 123 can be enhanced.
The third light emitting surface 123 opposite to the light incident surface 11 has the largest light flux per unit area, and each light guide plate 1 is provided with two light incident surfaces 11 respectively corresponding to the two third light emitting surfaces 123 in different directions, so that the illumination effect of the illumination device in different directions is enhanced.
Claims (14)
1. A lighting device mounted on a lighting device mounting portion, comprising:
the light guide plates are respectively provided with a light incident surface and a plurality of light emitting surfaces, the light emitting surfaces comprise a first light emitting surface close to one side of the lighting device installation part, a second light emitting surface far away from one side of the lighting device installation part, and a plurality of side light emitting surfaces connecting the first light emitting surface and the second light emitting surface, wherein at least one side light emitting surface is an inclined surface, the included angle between the inclined surface and the first light emitting surface is smaller than that between the inclined surface and the second light emitting surface or between the inclined surface and the first light emitting surface is larger than that between the inclined surface and the second light emitting surface, the first light emitting surface and the second light emitting surface are parallel to each other, the at least two light guide plates are arranged in the same plane, and the light incident surfaces are arranged oppositely or arranged in the same plane;
the fixed bracket is combined and connected with the light guide plate and is connected with the lighting device installation part;
at least two LED chip mounting parts respectively corresponding to the light incident surfaces of the light guide plates and arranged on the fixed support in a manner that the LED chips mounted on the LED chip mounting parts face the light incident surfaces;
the optical point is arranged on the first light-emitting surface or the second light-emitting surface and reflects part of light rays emitted into the light guide plate by the LED chip to the first light-emitting surface, the second light-emitting surface and the side light-emitting surface;
wherein the content of the first and second substances,
the luminous flux of the light emitted by the LED chip in the direction of the first light-emitting surface side of the light guide plate is different from the luminous flux in the direction of the second light-emitting surface side of the light guide plate.
2. A lighting device as recited in claim 1, wherein a luminous flux directed toward said first light-exiting surface side of said light guide plate is greater than a luminous flux directed toward said second light-exiting surface side of said light guide plate.
3. A lighting device as recited in claim 1, wherein a luminous flux directed toward said first light-exiting surface side of said light guide plate is smaller than a luminous flux directed toward said second light-exiting surface side of said light guide plate.
4. The illumination device as recited in claim 1, wherein the side light-emitting surface comprises a third light-emitting surface opposite to the light-incident surface and a fourth light-emitting surface connecting the third light-emitting surface and the light-incident surface.
5. A lighting device as recited in claim 4, wherein at least a portion of said third light exit surface or said fourth light exit surface is curved.
6. A lighting device as recited in claim 4, wherein said third light exit surface is a smooth slope.
7. A lighting device as recited in any one of claims 1-5, further comprising a light-emitting portion disposed between said at least two light guide plates and connected to said fixing bracket,
the light-emitting part comprises at least one LED chip group, and a plurality of LED chips mounted on the LED chip group face away from the direction of the lighting device mounting part.
8. A lighting device as recited in any one of claims 1-5, wherein each of said light guide plates corresponds to at least one of said LED chip mounting portions, and each of said LED chip mounting portions is connected to a control unit.
9. The illumination device as recited in claim 4, wherein an included angle between the light incident surface and the fourth light emitting surface is a chamfer.
10. The illumination device as claimed in claim 1, wherein the light incident surfaces of the plurality of light guide plates are disposed on the same plane, and one end of the light guide plate adjacent to the light incident surface is configured as an arc portion for total reflection of the light at the portion.
11. A lighting device as claimed in claim 1 or 2, wherein a metal heat sink is provided on the LED chip mounting portion.
12. A lighting device as claimed in claim 1 or 2, wherein the fixing bracket is provided with a plurality of slots, and the plurality of light guide plates are respectively engaged with the slots.
13. A lighting device as recited in any one of claims 1-5, wherein said LED chip mounting portion is a PCB.
14. A lighting device as recited in any one of claims 1-5, wherein said plurality of light guide plates are made of Polymethylmethacrylate (PMMA), synthetic resin, acrylic, Polycarbonate (PC), polyester, polyolefin, or glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810297118.3A CN110319375B (en) | 2018-03-30 | 2018-03-30 | Lighting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810297118.3A CN110319375B (en) | 2018-03-30 | 2018-03-30 | Lighting device |
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| CN110319375B true CN110319375B (en) | 2022-02-15 |
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