CN110554449A - Light-homogenizing plate and light-homogenizing lighting device - Google Patents
Light-homogenizing plate and light-homogenizing lighting device Download PDFInfo
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
Abstract
The invention relates to a light homogenizing plate and a light homogenizing lighting device. The light homogenizing illumination device comprises at least one light homogenizing plate, at least one active luminous source arranged on the light inlet side of the light homogenizing plate and a spectrum modulation layer arranged on the light outlet side of the light homogenizing plate; the light emitted by the active light source is uniformly scattered through the light homogenizing plate, and then modulated through the spectrum modulation layer and the spectrum is widened to form the required visible light. Compared with the prior art, the light homogenizing plate is added between the active light source and the spectrum modulation layer, so that light is transmitted in the light homogenizing plate and is uniformly and fully scattered by the micro-nano structure arranged on the light homogenizing plate, and the brightness uniformity of the lighting device is greatly improved.
Description
Technical Field
The invention relates to a light homogenizing plate and a light homogenizing lighting device, and belongs to the field of light sources.
Background
The backlight is a light source device for illuminating a passive light emitting display device such as a liquid crystal display. The backlight plate has the advantages of high light utilization efficiency, high uniformity, low power consumption, light weight and easy integration. The backlight plate is combined with a liquid crystal screen, is applied to illumination or photographic equipment such as a digital camera and the like, automobile instrument panels, navigation instruments, electric toys, notebook computer display screens, lamp devices, scanners and the like, and brings great convenience to life of people.
The backlight plate is generally composed of a light source, a light guide plate, an optical film, and the like; the light guide plate is made of optical acrylic/PC plates, and then materials with extremely high reflectivity and no light absorption are used for printing light guide points on the bottom surface of the optical acrylic plates by using laser engraving, V-shaped cross grid engraving and UV screen printing technologies. The optical-grade acrylic sheet is used for absorbing the light emitted from the lamp to stay on the surface of the optical-grade acrylic sheet, when the light irradiates each light guide point, the reflected light can be diffused towards each angle, and then the reflected light is damaged and is emitted from the front surface of the light guide plate. The light guide plate can uniformly emit light through various light guide points with different densities and sizes. The reflecting sheet is used for reflecting the light with the bottom surface exposed back to the light guide plate so as to improve the use efficiency of the light.
Due to the wide application of light guide plates, numerous researchers have made many innovations and attempts to design them, and further improvement of uniformity and utilization efficiency is desired. Chinese patent application No. CN201510198194.5 proposes to design two oriented V-grooves on the reflective sheet layer, and to improve the uniformity of the light output by changing the area ratio of the V-groove parallel to the incident plane to the V-groove perpendicular to the incident plane. Chinese patent application No. CN201521088224.9 proposes to design circular arc protruding strips and transition circular arc surfaces on the light exit surface to improve the uniformity and brightness of the light exit. Chinese patent application No. CN201621198948.3 proposes to lay cylinder type punctiform structure layer on the inner surface layer of the light guide plate, lay bar-shaped structure layer on the outer surface layer, and extrude into an organic whole with the light guide substrate three through the three-layer co-extrusion device, thereby forming a novel light guide plate, which also improves the light extraction efficiency and the uniformity to a certain extent.
However, the above-mentioned light guide plate structure is applied to a passive light source device, and cannot be applied to an active light source composed of LED array light sources; meanwhile, the surface structure of the light guide layer generally adopts a dot matrix or a grid formed by silk screen printing, and the structure usually has the phenomenon of ink falling, is difficult to store and has short service life; the lattice or grid structure itself limits further improvement of the light extraction efficiency and the brightness uniformity to some extent.
Disclosure of Invention
The invention aims to provide a light homogenizing plate and a light homogenizing lighting device which can obtain extremely high brightness uniformity and long service life in a light source with an active light-emitting structure.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a uniform light board, uniform light board is provided with the micro-nano structure that is used for the homodisperse light.
Further, the micro-nano structure is one or a combination of at least two of a pit, a free-form surface lens, a micro lens, a grating and a micro prism.
Further, the light homogenizing plate comprises a first surface and a second surface, and the micro-nano structure of the first surface is matched and corresponds to the micro-nano structure on the second surface.
Further, the micro-nano structure is a periodic structure or a non-periodic structure.
Further, the size range of the micro-nano structure is 100 nm-1 mm.
Further, the micro-nano structures are arranged on the light homogenizing plate in a pixel mode or a distributed mode.
Further, the smoothing plate is composed of a single material.
further, the light homogenizing plate further comprises a peripheral part arranged around the micro-nano structure, and the refractive index of the peripheral part is different from that of the micro-nano structure.
The invention also provides a light-homogenizing lighting device which comprises at least one light-homogenizing plate and at least one light source arranged on the light incidence side of the light-homogenizing plate.
Further, a spectral modulation layer is also included.
Further, the spectrum modulation layer is arranged on the light incident side of the light homogenizing plate.
Further, the spectrum modulation layer is arranged on the light emitting side of the light homogenizing plate.
Furthermore, the light source, the light homogenizing plate and the spectrum modulation layer are arranged in parallel.
Further, the spectrum modulation layer is a fluorescent layer or a quantum dot layer.
Further, the dodging lighting device further comprises a second dodging structure arranged between the dodging plate and the spectrum modulation layer.
Further, the dodging lighting device further comprises a second dodging structure arranged on the outermost layer of the light emitting side of the light source.
Further, the second light homogenizing structure is arranged in parallel with the light homogenizing plate and the spectrum modulation layer.
Further, the second light uniformizing structure is a prism.
The invention has the beneficial effects that: the micro-nano structure is arranged on the light homogenizing plate, so that the effects of receiving light rays and uniformly scattering the light rays are achieved;
The spectrum modulation layer is arranged on the light-emitting side of the light-homogenizing plate in parallel, so that the effect of changing or widening the illumination spectrum and forming uniformly distributed visible light is achieved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1a is a schematic structural diagram of the dodging lighting device of the present invention.
Fig. 1b is a perspective view of the dodging lighting device of the present invention.
Fig. 1c is a schematic structural diagram of the lighting device according to the first embodiment.
Fig. 1d is a light traveling diagram of the lighting device according to the first embodiment.
Fig. 1e shows the dark stripes formed between the LED light sources of the lighting device according to the first embodiment.
Fig. 2a is a schematic structural diagram of a micro-nano structure arranged on a light uniformizing plate in a pixel manner.
Fig. 2b is a schematic structural diagram of micro-nano structures distributed on a light-homogenizing plate in a distributed manner.
Fig. 3a is a schematic structural view of a light homogenizing plate adopting a pit structure in the second embodiment.
Fig. 3b is another structural diagram of the light homogenizing plate adopting the pit structure in the second embodiment.
Fig. 4a is a schematic structural diagram of a light homogenizing plate adopting a free-form surface lens structure in the second embodiment.
Fig. 4b is another schematic structural diagram of the light homogenizing plate adopting the free-form surface lens structure in the second embodiment.
Fig. 5a is a schematic structural diagram of a light homogenizing plate adopting a micro-lens structure in the second embodiment.
Fig. 5b is another schematic structural diagram of the light homogenizing plate adopting the micro-lens structure in the second embodiment.
Fig. 6 is a schematic view of the light direction of the dodging lighting device according to the second embodiment.
FIG. 7 is a schematic view showing the light direction of the LED light propagating in the light uniformizing plate according to the third embodiment.
Fig. 8a is a schematic structural diagram of a fourth lighting device according to an embodiment.
Fig. 8b is a schematic perspective view of the dodging lighting device shown in fig. 8 a.
Fig. 9a is a schematic structural view of the dodging lighting device according to the fifth embodiment.
Fig. 9b is a schematic perspective view of the dodging lighting device shown in fig. 9 a.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The dodging plate 2 is provided with a micro-nano structure 24 for uniformly dispersing light 4, and specifically comprises the following components: the micro-nano structure 24 may be one or a combination of at least two of a pit, a free-form surface lens, a micro lens, a grating, and a micro prism. The light homogenizing plate 2 comprises a first surface 23, a second surface 21 and an inner core 22, and the micro-nano structure 24 is respectively arranged on the first surface 23, the second surface 21 and the inner core 22 so as to achieve the optimal effect of homogenizing and dispersing light. Indeed, the micro-nano structure 24 is arranged on any one or more of the first surface 23, the second surface 21 and the inner core 22, so that the effect of uniform light scattering can be achieved, and the effect is determined according to actual conditions. The depth of the micro-nano structure 24 on the first surface 23 and the second surface 21 of the light homogenizing plate 2 is variable, and the light extraction efficiency is further adjusted. In order to obtain more uniform light 4, the micro-nano structure 24 on the first surface 23 of the light uniformizing plate 2 and the micro-nano structure 24 on the second surface 21 of the light uniformizing plate 2 should be matched and correspond to each other. As shown in fig. 2a and fig. 2b, the micro-nano structures 24 are arranged on the light homogenizing plate 2 in a pixel manner or a distributed manner, so as to achieve a more uniform light splitting effect. The pixel type arrangement is that one micro-nano structure 24 is regarded as a pixel unit, and the number of rows and columns is randomly selected and arranged in a limited area; distributed arrangement is that the micro-nano structures 24 are arranged to all places in a limited area; wherein, the distance between the pixel-type arranged micro-nano structures 24 is larger than the distance between the distributed micro-nano structures 24. The micro-nano structure 24 is a periodic structure or a non-periodic structure, and the size range is 100 nm-1 mm. The light homogenizing plate 2 can be made of a single material, when the light homogenizing plate 2 is made, plastic or glass can be selected as the material, the light homogenizing plate 2 is preferably made of the plastic, so that the product is lighter and lower in cost, the micro-nano structure 24 on the light homogenizing plate 2 can be made by utilizing a gray level photoetching process, a laser etching process and other preparation methods, and batch copying is realized by utilizing a nano-imprinting process. The light homogenizing plate further comprises a peripheral part arranged around the micro-nano structure, and the refractive index of the peripheral part is different from that of the micro-nano structure, namely the peripheral part is made of materials with different refractive indexes.
The present invention also provides an dodging lighting device, as shown in fig. 1a and 1b, comprising at least one dodging panel 2 as described above, further comprising: the light source 1 is arranged on the light incident side of the light homogenizing plate 2, and the spectrum modulation layer 3 is arranged on the light emergent side or the light incident side of the light homogenizing plate 2, wherein the light source 1, the light homogenizing plate 2 and the spectrum modulation layer 3 are arranged in parallel; the light emitted from the light source 1 is uniformly scattered by the light uniformizing plate 2, and then modulated and spectrally broadened by the spectral modulation layer 3 to form desired visible light. The spectrum modulation layer 3 is a fluorescent layer or a quantum dot layer 3, wherein fluorescence is one of photoluminescence, and a substance absorbs electromagnetic radiation (light) and then emits new electromagnetic radiation (light); quantum dots are nano-scale semiconductors that emit light at a specific frequency by applying a certain electric field or light pressure to the nano-semiconductor material, the frequency of the emitted light varying with the size of the nano-semiconductor. In this embodiment, the light source 1 is an active light emitting source 1, and the active light emitting source 1 is a locally adjustable and controllable LED array light source 1 (i.e. a light source arranged by a plurality of light emitting diode arrays). For example: the light emitted by the LED array light source 1 is light in an ultraviolet band, and the light in the ultraviolet band is uniformly scattered after passing through the second surface 21, the inner core 22 and the first surface 23 of the light homogenizing plate 2 in sequence, and then enters the spectrum modulation layer 3 to emit uniform white light. For better description and comparison, in the following embodiments, the LED array light sources 1 are all 9 LED light sources arranged in an array, and the number of the LED array light sources 1, the light uniformizing plate 2 and the fluorescent layer or quantum dot layer 3 is one.
EXAMPLE I (Prior Art)
Referring to fig. 1c to fig. 1e, the light homogenizing plate 2 is not disposed between the active light source 1 and the spectrum modulation layer 3 in the lighting device of the present embodiment. The active light source 1 is an LED array light source 1, the LED array light source 1 is 9 LED light sources arranged in an array, and the spectrum modulation layer 3 is a fluorescent layer or a quantum dot layer 3. The light emitted from the LED array light source 1 is directly irradiated to the fluorescent layer or quantum dot layer 3, and since the thin film made of the fluorescent material or quantum dot has diffusibility, the light 4 passing through the thin film is emitted in all directions, and a certain light uniformizing effect is obtained. However, when the LED distance in the array light source is large, the diffusivity of the fluorescent layer or quantum dot layer 3 is insufficient to achieve complete uniform illumination, and dark stripes appear in the middle of every two LED light sources.
Example two
Referring to fig. 1a and fig. 1b, unlike the first embodiment, the uniform light illumination device of the present embodiment has a uniform light plate 2 disposed in parallel between an LED array light source 1 and a fluorescent layer or quantum dot layer 3. The LED array light source 1 is arranged at the bottommost layer, and a light homogenizing plate 2 and a fluorescent layer or quantum dot layer 3 are sequentially arranged on the LED array light source 1. In the present embodiment, the LED array light source 1, the light uniformizing plate 2 and the fluorescent layer or quantum dot layer 3 are disposed in parallel, so that the light 4 can achieve the best uniform dispersion effect. Indeed, in other embodiments, the LED array light source 1, the light uniformizing plate 2 and the fluorescent layer or quantum dot layer 3 may be non-parallel, and accordingly, the performance of uniformly dispersing the light 4 is reduced. The micro-nano structure 24 is added in the light homogenizing plate 2, the LED array light source 1 irradiates the light homogenizing plate 2, and light 4 is scattered through the structure of the second surface 21 of the light homogenizing plate 2; the scattered part of light 4 is further scattered through the internal micro-nano structure 24 and uniformly emitted to the fluorescent layer or the quantum dot layer 3, the rest part of light 4 meets the total reflection condition and is totally reflected in the light uniformizing plate 2, when the total reflection light 4 passes through the first surface 23 structure designed in a matching way, the total reflection condition can be destroyed, and the reflected lights can be diffused at various angles and emitted from the first surface 23 of the light uniformizing plate 2; finally reaches the fluorescent layer or quantum dot layer 3 to realize uniform illumination. At this time, the light exiting the fluorescent layer or the quantum dot layer is uniformly distributed in the entire plane, and no dark area occurs.
In this embodiment, the micro-nano structure 24 is periodic or aperiodic, and the size of the micro-nano structure 24 is preferably between 100nm and 1mm, so that the light uniformity is more excellent. The micro-nano structure 24 may be a pit, a free-form surface lens, a microlens, a grating, a micro prism, or other structures, and in this embodiment, the micro-nano structure 24 is a pit, a free-form surface lens, or a microlens. Referring to fig. 3a and 3b, the micro-nano structure 24 is a concave pit, and the concave pits are simultaneously formed on the first surface 23 and the second surface 21 of the light uniformizing plate 2, so that the light 4 is uniformly scattered. Referring to fig. 4a and 4b, the micro-nano structure 24 is a free-form lens, and the free-form lens is disposed on both the first surface 23 and the second surface 21 of the light uniformizing plate 2, so that the light 4 is uniformly scattered. Referring to fig. 5a and 5b, the micro-nano structure 24 is a micro-lens, and the micro-lens is disposed on both the first surface 23 and the second surface 21 of the light uniformizing plate 2, so that the light 4 is uniformly scattered. Indeed, in other embodiments, the micro-nano structure 24 may be of other structures, so as to achieve the effect of uniform scattering of the light 4.
Referring to fig. 6, the LED array light source 1, the light uniformizing plate 2 and the fluorescent layer or quantum dot layer 3 are arranged in parallel, and the micro-nano structure 24 is disposed on the first surface 23 and the second surface 21 of the light uniformizing plate 2. When light emitted by the LED array light source 1 passes through the second surface 21 structure of the light homogenizing plate 2, the light 4 is scattered. Wherein, part of the light 4 can directly penetrate through the structure and irradiate the fluorescent layer or the quantum dot layer 3, and the rest of the light 4 takes the light homogenizing plate 2 as a waveguide and is reflected back and forth in the light homogenizing plate 2. When the light 4 is transmitted to the specific structure of the first surface 23 of the light uniformizing plate 2, part of the light 4 is emitted from the light uniformizing plate 2, the rest of the light 4 is continuously transmitted towards the waveguide transmission direction, when the light 4 contacts the specific structure of the first surface 23 again, part of the light 4 is still emitted, and by analogy, a plurality of light emitting points are formed in the light uniformizing plate 2, so that a better light uniformizing effect is realized. Each LED light source will form a plurality of light emitting dots in a plane, and thus, the uniformity of light finally emitted to the phosphor layer or quantum dot layer 3 will be greatly improved.
EXAMPLE III
The dodging lighting device of the present embodiment is substantially the same as the second embodiment, and the difference is that: the LED array light source 1, the fluorescent layer or quantum dot layer 3 and the light homogenizing plate 2 are sequentially arranged in parallel, the sequence of the light homogenizing plate 2 and the fluorescent layer or quantum dot layer 3 is changed, light emitted by the light source 1 is subjected to spectrum modulation through the fluorescent layer or quantum dot layer 3, and then light homogenizing is achieved through the light homogenizing plate 2.
Example four
Referring to fig. 7, the uniform light illumination device of the present embodiment is substantially the same as the second embodiment, and the difference is: the number of the micro-nano structures 24 arranged on the first surface 23 of the light homogenizing plate 2 is larger than that of the micro-nano structures 24 arranged on the second surface 21. When the LED array light source 1 irradiates the light homogenizing plate 2, due to the special design of the structure of the second surface 21 of the light homogenizing plate 2, part of light 4 can directly penetrate through the light homogenizing plate 2 to be emitted to the fluorescent layer or the quantum dot layer 3, and the rest part of light 4 is scattered; the scattered light 4 meets the total reflection condition and is totally reflected in the light homogenizing plate 2, when the total reflection light 4 passes through the first surface 23 structure which is specially designed, the total reflection condition can be destroyed, and the reflected lights can be diffused to various angles and emitted out from the first surface 23 of the light homogenizing plate 2; finally reaches the fluorescent layer or quantum dot layer 3 to realize uniform illumination. At this time, the light exiting the fluorescent layer or the quantum dot layer is uniformly distributed in the entire plane, and no dark area occurs.
EXAMPLE five
The dodging lighting device of the present embodiment is basically the same as the second and fourth embodiments, and the difference is that: the light-homogenizing illumination device further comprises a second light-homogenizing structure 5 arranged between the light-homogenizing plate 2 and the spectrum modulation layer 3, and the second light-homogenizing structure 5 is arranged in parallel with the light-homogenizing plate 2 and the spectrum modulation layer 3. In this embodiment, the second light unifying structure 5 is a prism. Referring to fig. 8a and 8b, in the present embodiment, a layer of prism 5 is additionally added on the light emitting side of the light uniformizing plate 2 and the light incident side of the fluorescent layer or quantum dot layer 3, which functions to further scatter the light 4 emitted from the light uniformizing plate 2, so as to achieve a better light uniformizing effect.
EXAMPLE six
The uniform light illumination device of the present embodiment is substantially the same as the second embodiment and the fourth embodiment, and the difference is that: the dodging lighting device further comprises a second dodging structure 5 arranged on the light emitting side of the spectrum modulation layer 3, namely the second dodging structure 5 is arranged on the outermost layer of the light emitting side of the light source 1, and the second dodging structure 5 is arranged in parallel with the spectrum modulation layer 3. In this embodiment, the second light unifying structure 5 is a prism. Referring to fig. 9a and 9b, in the present embodiment, a layer of prism 5 is additionally added on the light emitting side of the fluorescent layer or quantum dot layer 3, and the function of the prism is to further scatter the light 4 emitted from the light-homogenizing plate 2, so as to achieve a better light-homogenizing effect.
It can be seen from the above experiment that: in the lighting device of the first embodiment, the light homogenizing plate 2 is not arranged between the LED array light source 1 and the fluorescent layer or quantum dot layer 3, and finally, a dark fringe phenomenon is generated at the middle position of every two LED light sources 1; in the second embodiment and the fourth embodiment, the light homogenizing plate 2 is arranged between the LED array light source 1 and the fluorescent layer or quantum dot layer 3, and the micro-nano structure 24 is arranged on the light homogenizing plate 2, so that the light 4 of the LED array light source 1 is uniformly scattered when passing through the light homogenizing plate 2, and finally, when reaching the fluorescent layer or quantum dot layer 3, uniform light illumination is realized; in the fifth embodiment and the sixth embodiment, on the basis of the second embodiment and the fourth embodiment, the prism 5 is additionally arranged, so that the light 4 is further scattered, and a better light-homogenizing effect is achieved. Through comparison, in the second embodiment to the sixth embodiment, because the light-homogenizing plate 2 is added in the device, the light 4 is uniformly dispersed, so that dark stripes cannot appear at the middle position of every two LED light sources 4, and the brightness of the light-homogenizing illumination device is uniformly and greatly improved.
In summary, the following steps: the micro-nano structure 24 is arranged on the light uniformizing plate 2, so that the effects of receiving the light 4 and uniformly scattering the light 4 are achieved; through set up spectrum modulation layer 3 in even 2 light-emitting sides of light board parallel, reach and change or widen the illumination spectrum, form the effect of evenly distributed visible light, the luminance degree of consistency improves by a wide margin, and even 2 accessible current nanometer impression technical industrialization production of light board, the preparation technology is ripe and not be suitable for printing ink, avoids causing the phenomenon that printing ink drops in the use in order to reduce life.
The micro-nano structure 24 is arranged on the second surface 21, the inner core 22 and the first surface 23 of the light homogenizing plate 2, so that the light 4 with extremely high uniformity is generated and distributed. The uniform light illuminating device can be arranged in a rectangular shape, can be compatible with the existing liquid crystal screen framework, and has wide application field.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (18)
1. The light homogenizing plate is characterized in that a micro-nano structure for uniformly dispersing light is arranged on the light homogenizing plate.
2. The dodging plate of claim 1, wherein the micro-nano structure is one of a pit, a free-form surface lens, a micro lens, a grating and a micro prism or a combination of at least two of the above.
3. The light homogenizing plate according to claim 1, wherein the light homogenizing plate comprises a first surface and a second surface, and the micro-nano structure of the first surface is matched and corresponds to the micro-nano structure on the second surface.
4. The dodging plate of claim 1, wherein the micro-nano structure is a periodic structure or a non-periodic structure.
5. The light homogenizing plate according to claim 1, wherein the micro-nano structures have a size ranging from 100nm to 1 mm.
6. The light homogenizing plate of claim 1, wherein the micro-nano structures are arranged on the light homogenizing plate in a pixel manner or a distributed manner.
7. The light distribution plate of claim 1, wherein the light distribution plate is comprised of a single material.
8. The light homogenizing plate according to claim 1, further comprising a peripheral portion surrounding the micro-nano structure, wherein the peripheral portion has a refractive index different from that of the micro-nano structure.
9. A dodging lighting device, comprising at least one dodging plate according to any one of claims 1 to 8, and at least one light source arranged on the light incident side of the dodging plate.
10. The dodging device of claim 9, further comprising a spectral modulation layer.
11. The dodging apparatus of claim 10, wherein said spectral modulation layer is disposed on a light entrance side of said dodging panel.
12. The dodging lighting device of claim 10, wherein the spectral modulation layer is disposed on a light exit side of the dodging panel.
13. The light homogenizing illumination device according to claim 10, wherein the light source, the light homogenizing plate and the spectral modulation layer are disposed in parallel.
14. The dodging apparatus of claim 10, wherein the spectral modulation layer is a phosphor layer or a quantum dot layer.
15. The light homogenizing illumination device of claim 10 further comprising a second light homogenizing structure disposed between the light homogenizing plate and the spectral modulation layer.
16. The dodging device of claim 10, further comprising a second dodging structure disposed outermost on a light exit side of the light source.
17. A dodging lighting device according to any one of claims 15 or 16, wherein the second dodging structure is arranged parallel to the dodging panel and the spectral modulation layer.
18. The dodging apparatus of claim 17, wherein the second dodging structure is a prism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810554916.XA CN110554449A (en) | 2018-06-01 | 2018-06-01 | Light-homogenizing plate and light-homogenizing lighting device |
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| CN201810554916.XA CN110554449A (en) | 2018-06-01 | 2018-06-01 | Light-homogenizing plate and light-homogenizing lighting device |
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| CN108020881A (en) * | 2017-12-04 | 2018-05-11 | 福州大学 | It is a kind of to contain light guide plate encapsulating structure of quantum dot micro structure array and preparation method thereof for surface |
| CN208737023U (en) * | 2018-06-01 | 2019-04-12 | 苏州苏大维格光电科技股份有限公司 | Uniform light board and even illuminating apparatus |
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| CN103363440A (en) * | 2012-04-03 | 2013-10-23 | 元太科技工业股份有限公司 | Front light module and light source modulation device thereof |
| CN107121723A (en) * | 2017-05-16 | 2017-09-01 | 深圳市华星光电技术有限公司 | A kind of light guide plate, backlight module and display device |
| CN108020881A (en) * | 2017-12-04 | 2018-05-11 | 福州大学 | It is a kind of to contain light guide plate encapsulating structure of quantum dot micro structure array and preparation method thereof for surface |
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