CN213362116U - Planar light source for realizing monitoring of multiple standard spectrums and spectrum data and device thereof - Google Patents

Abstract

The utility model discloses a plane light source for realizing monitoring of various standard spectrums and spectrum data, which comprises an outer frame, a front diffusion plate, a light guide plate, a rear diffusion plate, an outer bottom plate and an outer cover plate from top to bottom in sequence; a plurality of points are engraved on the front surface and the back surface of the light guide plate and used for reflecting and uniformly mixing light emitted by the LED lamp beads; side lamp strips are arranged on four sides of the light guide plate, and a plurality of types of LED lamp beads required for realizing standard light are integrated on the side lamp strips; the outer bottom plate is provided with a projection hole of the micro spectrometer, and the micro spectrometer is arranged on the outer cover plate and located on the side edge of the light emitting surface of the light source and used for reading and monitoring spectrum data in real time. A planar light source device for monitoring multiple standard spectra and spectral data is also disclosed. The utility model discloses can realize obtaining the multiple light source spectrum (A light, D50, D65) that accords with the CIE standard, and actual colour temperature, illuminance and the spectral data that can the real time monitoring light source, the accuracy is high.

Description

Planar light source for realizing monitoring of multiple standard spectrums and spectrum data and device thereof

Technical Field

The utility model relates to a light source field especially relates to a realize multiple standard spectrum and spectral data control's planar light source and device thereof.

Background

Light sources are generally classified into two types: natural light sources, which are mainly sunlight, and artificial light sources, which are mainly light sources produced from the spectrum of sunlight. The spectrum wavelength of sunlight is known to be about 300nm ultraviolet light to 2600nm infrared light, wherein the wavelength of visible light is about 380-780 nm. Meanwhile, the visible light spectrum is also commonly referred to as visible full spectrum.

In modern industry, each industry needs to identify color of products, the color standard is natural light, but the color of the natural light is unstable due to factors such as time, climate, season, latitude and the like, so that the modern industry generally tends to use artificial light sources to realize accurate color matching.

To define an artificial light source for evaluating the color appearance, the CIE (international commission on illumination) specifies a series of standard illuminants and standard light sources in succession. The advent of CIE standard illuminants has made it possible for the industry to accurately register colors, by which is meant artificial light sources that conform to, or to some extent, the spectral composition of CIE standard illuminants.

At present, the development of artificial light sources has two directions, a thermal light source; another cold light source: the thermal light sources include tungsten filament lamp and metal halogen lamp, which contain visible light full spectrum characteristic and infrared spectrum, and the light emitting mechanism is realized through heat radiation, so that the reliability and the stability time are great defects and energy consumption. The light source of the light source such as an LED fluorescent lamp of a blue light chip and the like has a light emitting mechanism which is realized by the excitation of fluorescent powder, and the characteristic spectra of red light and purple light are lacked, so that the color reducibility is poor.

In the industry, many products need to be calibrated in function under standard light sources. According to the requirement, the light sources required by different products are different, and in some cases, only one light source cannot be used, such as the same product, and the light sources need to be subjected to color matching under different light source environments of D65, TL84, UV, F, CWF and the like. The color matching is required by customers for multiple light sources, and the color developing effect is different due to the fact that the light sources have different light intensities, so that the color matching difficulty is increased.

Some manufacturers have introduced so-called multi-light source color matching light boxes, but actually, several light sources, such as D65, TL84, U3000, CWF, a lamp, uv lamp and fluorescent lamp, are installed in one light box. Appear uniform and are actually separate. Moreover, the light source integrated products have different light emitting modes due to different types, such as magnetoelectric electrodeless lamps, high-pressure sodium lamps, low-pressure sodium lamps, halogenated lamps, fluorescent lamps, high-pressure mercury lamps, incandescent lamps and the like, so that the integrated color matching lamp box has multiple defects: firstly, the service life of the light source is short; secondly, the power consumption is large; thirdly, the heat polymerization effect exists, and the uniformity of a light source is not good; fourthly, the start-up stability time is long; fifthly, the more light sources are integrated, the higher the cost of the lamp box is; sixthly, the application is limited, and the size of the used object and the use environment are only limited to the specific environment or the light source in the light box; seventh, the light sources on the market are not mutually convertible.

In addition, each light has a spectrum curve, and whether the obtained spectrum meets the CIE standard or not and whether the obtained spectrum can reach 90% matching degree after meeting is still the technical problem to be solved in the field. Therefore, it is desirable to provide a novel planar light source capable of monitoring a plurality of standard spectra and spectral data to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a realize multiple standard spectrum and spectral data control's planar light source and device thereof is provided, not only can realize obtaining the multiple light source spectrum (A light, D50, D65) that accords with the CIE standard, actual colour temperature, illuminance and the spectral data that can real time monitoring light source moreover, the accuracy is high.

In order to solve the technical problem, the utility model discloses a technical scheme be: the plane light source for realizing monitoring of various standard spectrums and spectrum data sequentially comprises an outer frame, a front diffusion plate, a light guide plate, a rear diffusion plate, an outer bottom plate and an outer cover plate from top to bottom;

a plurality of points are engraved on the front surface and the back surface of the light guide plate and used for reflecting and uniformly mixing light emitted by the LED lamp beads;

side lamp strips are arranged on four sides of the light guide plate, and a plurality of types of LED lamp beads required for realizing standard light are integrated on the side lamp strips;

the outer bottom plate is provided with a projection hole of the micro spectrometer, and the micro spectrometer is arranged on the outer cover plate and located on the side edge of the light emitting surface of the light source and used for reading and monitoring spectrum data in real time.

In a preferred embodiment of the present invention, the front diffuser plate and the rear diffuser plate are provided with a diffusion sheet on a surface opposite to the light guide plate.

Furthermore, the diffusion sheet adopts a cosine correction sheet for correcting the spectrum curve.

In a preferred embodiment of the present invention, a violet light enhancer and a blue light enhancer are added to the front diffuser plate and the rear diffuser plate for enhancing the passing rate of two sections of spectra of violet light 380-435 nm and blue light 450-480 nm, respectively.

In a preferred embodiment of the present invention, the types of the LED lamp beads include a light LED lamp bead, a D50 light LED lamp bead, and a D65 light LED lamp bead.

In a preferred embodiment of the present invention, the outer frame is located at an inner edge of the outer bottom plate, the outer bottom plate is a hollow structure, and the bottom surface is sealed by the outer cover plate.

In a preferred embodiment of the present invention, the outer frame is provided with a wire slot.

For solving the technical problem, the utility model discloses a another technical scheme is: the planar light source device for monitoring various standard spectrums and spectrum data comprises the planar light source, the controller and the computer which are used for monitoring various standard spectrums and spectrum data, wherein the planar light source, the controller and the computer are sequentially connected;

the controller is used for acquiring spectrum data of the plane light source, monitoring actual color temperature, illumination and spectrum data of the light source in real time, and controlling different types of LED lamp beads to emit required light sources.

The computer is used for manually or automatically adjusting the required color temperature, illumination and spectral value of the light source, and realizing closed-loop adjustment and control of the plane light source.

The utility model has the advantages that:

(1) the plane light source of the utility model utilizes the LED lamp beads as the light source, if the side light bar integrates the LED lamp beads with A light, D50 light and D65 light, a plurality of light source spectrums (A light, D50 and D65) meeting the CIE standard can be obtained; the optical path structure is skillfully designed, and a cosine correction chip is used for correction. The light source is fused together after passing through the light guide plate, the diffusion sheet and the diffusion plate, so that the uniformity of color temperature and illumination on the surface of the light source is up to more than 95%, the uniformity of the light source is realized, the uniformity of a light-emitting surface is ensured, and the uniformity of illumination can reach more than 95%; color uniformity is > 98%;

(2) the plane light source of the utility model utilizes the LED lamp bead as a luminous source, namely, the ultraviolet chip (365NM) is applied to excite the visible light all-band fluorescent powder and the near infrared fluorescent powder, thereby not only realizing the stable and energy-saving characteristics of a cold light source, but also realizing the real full spectrum of a hot light source, and realizing the method of obtaining the previous hot light source by utilizing the cold light source; the utility model can solve the defects of all the prior artificial light sources and realize real benefits to all the industries in the world;

(3) the micro spectrometer is arranged in the plane light source, can read spectral data and monitored spectral data in real time and can be read out by an upper computer, the accuracy is improved, the installation position has strict requirements, the lighting is close to the surface of the light source for lighting, and the lighting of a client camera module is not influenced;

(4) the light source device can realize manual regulation, automatic regulation and light source color temperature, illumination and spectral value which are required by closed-loop regulation through a built-in spectrometer, and can independently control A light, D50 light and D65 light at the same time, and can also control two kinds of light to synthesize one light, for example, when D65 light is damaged, the A light and the D50 light can be combined into D65 light, the application is more flexible, and the light source device is suitable for automatic production lines and unmanned production lines by implementing closed-loop control.

Drawings

FIG. 1 is a schematic perspective view of a preferred embodiment of a planar light source for monitoring multiple standard spectra and spectral data according to the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a rear view of FIG. 1;

FIG. 4 is a front view of FIG. 1;

FIG. 5 is a left side view of FIG. 1;

FIG. 6 is an exploded view of FIG. 1;

FIG. 7 is a schematic view of a light path structure of the planar light source;

FIG. 8 is a schematic structural diagram of the planar light source device for implementing monitoring of various standard spectra and spectral data;

FIG. 9 is a graph of spectral data of the planar light source implementing standard A light;

fig. 10 is a graph of spectral data of the planar light source implementing standard D50 light;

fig. 11 is a graph of spectral data of the planar light source implementing standard D65 light.

The parts in the drawings are numbered as follows: 1. the device comprises a plane light source, 10 a micro spectrometer, 11 an outer frame, 111 a wire outlet groove, 12 a front diffusion plate, 13 a light guide plate, 14 a rear diffusion plate, 15 an outer bottom plate, 151 a projection hole, 16 an outer cover plate, 17 a side light bar, 18 an LED lamp bead, 19 a cosine correction sheet, 2 a controller, 3 a computer.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 1 to 6, an embodiment of the present invention includes:

a plane light source 1 for realizing monitoring of various standard spectrums and spectrum data sequentially comprises an outer frame 11, a front diffusion plate 12, a light guide plate 13, a rear diffusion plate 14, an outer bottom plate 15 and an outer cover plate 16 from top to bottom. The outer frame 11 is located at the inner side edge of the outer bottom plate 15, the outer bottom plate 15 is of a hollow structure, the bottom surface of the outer bottom plate is sealed by an outer cover plate 16, and the outer bottom plate is fixedly connected with the outer bottom plate through screws. An outlet groove 111 is arranged on the outer side of the outer frame 11, and can be divided into a combined type and an integrated type.

Side light bars 17 are arranged on four sides of the light guide plate 13, and a plurality of types of LED lamp beads 18 required for realizing standard light are integrated on the side light bars 17. The LED lamp bead 18 is a standard spectrum cold light source, and has the advantages of small volume, low heat, high brightness, environmental protection, long service life, strong penetrating power, low power consumption and high light quality. In this embodiment, the LED lamp beads 18 capable of emitting standard spectra of light a, light D50, and light D65 are selected, a certain number of the same type of LED lamp beads 18 are selected to be manufactured into light-emitting strips, and finally, the three groups of different types of LED lamp beads are integrated into the side light strip 17 to serve as the light-emitting sources of the planar light source 1. The combination of the three different types of beads can realize standard spectrums of light A, light D50 and light D65 in standard light, as shown in FIGS. 9 to 11. Similarly, the customer may add additional light bars to the set of side light bars 17 if they have other standard light requirements.

The front and back of the light guide plate 13 are engraved with a plurality of dots for reflecting and mixing the light emitted from the LED lamp beads 18 uniformly. The front diffuser 12 and the rear diffuser 14 function not to filter short-wavelength light, the front diffuser 12 and the rear diffuser 14 are symmetrically disposed with respect to the light guide plate 13, and a diffuser is disposed on one side of the front diffuser 12 and the rear diffuser 14 with respect to the light guide plate 13. Preferably, the diffusion sheet adopts a cosine correction sheet 19 for correcting the spectral curve. The light guide plate 13 has a quartz spectral transmittance characteristic for reducing a spectral curve of the light emitter. Referring to fig. 7, the light emitted from the side light bars 17 passes through the striking points under the light guide plate 13 to emit light, and the emitted light is reflected to the top by the cosine correction sheet 19. Therefore, the dotted light guide plate 13 not only can reflect the light emitted by the LED lamp beads 18, but also has an effect that the light changes after passing through the circular diffusion point-columnar microstructure, the distribution density of the microstructure is changed, and the light emission uniformity is controlled, so that the dotted light guide plate has requirements in the aspect of dotted points, and the experimental data shows that when the distance between the X (0.5-10 mm) and the diameter of the point hole are D (0.2-2 mm), the uniformity of the light can be obtained to be greater than or equal to 95%. In addition, the front diffusion plate 12 and the back diffusion plate 14 can pass light of 300 mn-1000 mn, and are added with a purple light reinforcing agent and a blue light reinforcing agent for respectively reinforcing the passing rate of two sections of spectrums of 380-435 nm purple light and 450-480 nm blue light, so that the spectrum curve of the section of 380-480 nm is matched with the standard spectrum after passing through the diffusion plates. Similarly, the dotted light guide plate 13 is a UV light guide plate capable of passing a spectrum of 300nm to 1000 nm.

The light source is in certain field of vision within range, the luminous angle of different group side lamp strip 17, luminous colour, luminance, luminous area diverse. After the light path processing, the light emitted by the plane light source 1 has illuminance uniformity of > 95% and color uniformity of > 98%, and is corrected by a cosine correction sheet 19 by adopting a specific light path structure. The light source is fused together after passing through the light guide plate 13, the diffusion sheet and the diffusion plate, so that the uniformity of color temperature and illumination on the surface of the light source is up to more than 95%. In addition, the light path structure can also solve the problem of spectral curve, even if the spectrum emitted by the corresponding standard spectrum LED does not necessarily meet the CIE standard, the light path structure can also play a role in correcting the spectral curve. The plane light source 1 uses the cosine correction sheet 19, and the light transmittance of the plane light source to red light and blue light is controlled by using the cosine correction sheet, so that the channel crosstalk error caused by side wall light leakage can be effectively controlled.

In order to ensure the debugged light source and accord with the spectral characteristics of the light source, the outer bottom plate 15 is provided with a projection hole 151 of the micro spectrometer 10, the micro spectrometer 10 is arranged on the outer cover plate 16 and positioned at the side position of the light emitting surface of the light source and used for reading and monitoring spectral data in real time and reading the spectral data on an upper computer, so that the manual test of instruments is not needed, and the color temperature, the brightness, the x value and the y value (the chromaticity coordinate of the light source) of the light source can be fed back by a controller in real time. The installation position of the micro spectrometer 10 has strict requirements, lighting needs to be close to the surface of the light source, and lighting of the client camera module is not influenced; under the condition that the parameters of the light source emitted by the light emitting surface of the light guide plate 13 are consistent, the micro spectrometer 10 is arranged at the side edge of the light emitting surface, so that the spectrum of the used light source can be effectively monitored in real time, and meanwhile, the use is not influenced. The customer can monitor the real value of the light source parameter in real time, and can adjust the light source parameter in time after the light source parameter exceeds the standard, so that the reject ratio caused by the light source is avoided. In contrast, when the micro spectrometer 10 is installed at other positions of the light source, such as corners and inner edges of the structure, the monitored light source parameters will deviate from the light source parameters used by the customer, and the parameters of the light source change will not increase or decrease in the same magnitude as the parameters read by the micro spectrometer 10, and the monitoring effect of the light source will also decrease accordingly.

Further, the utility model also discloses a realize multiple standard spectrum and spectral data monitoring's planar light source device, include as above the planar light source 1, controller 2, the computer 3 that realize multiple standard spectrum and spectral data monitoring, planar light source 1, controller 2, computer 3 connect gradually, as shown in fig. 8.

The controller 2 is used for acquiring spectrum data of the micro spectrometer 10 built in the plane light source 1, monitoring the actual color temperature, illumination and spectrum data of the light source in real time, and controlling different types of LED lamp beads 18 to emit required light sources.

The built-in dimming software of computer 3 can realize manual regulation, automatically regulated and do the light source colour temperature, illuminance and the spectral value of closed-loop control demand through built-in micro spectrometer 10, can independent control A light, D50 light, D65 light simultaneously, also can control two kinds of photosynthesis light, if when D65 light damages, A light + D50 light can make up into D65 light, and it is more nimble to use, through implementing closed-loop control, is applicable to automation line and unmanned production line.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (8)

1. A plane light source for realizing monitoring of various standard spectrums and spectrum data is characterized by sequentially comprising an outer frame, a front diffusion plate, a light guide plate, a rear diffusion plate, an outer bottom plate and an outer cover plate from top to bottom;

a plurality of points are engraved on the front surface and the back surface of the light guide plate and used for reflecting and uniformly mixing light emitted by the LED lamp beads;

side lamp strips are arranged on four sides of the light guide plate, and a plurality of types of LED lamp beads required for realizing standard light are integrated on the side lamp strips;

the outer bottom plate is provided with a projection hole of the micro spectrometer, and the micro spectrometer is arranged on the outer cover plate and located on the side edge of the light emitting surface of the light source and used for reading and monitoring spectrum data in real time.

2. The planar light source for monitoring multiple standard spectra and spectral data according to claim 1, wherein the front diffuser plate and the back diffuser plate are provided with a diffuser plate on a side opposite to the light guide plate.

3. The planar light source for realizing monitoring of multiple standard spectrums and spectral data according to claim 2, wherein the diffusion sheet adopts a cosine correction sheet for correcting a spectrum curve.

4. The planar light source for realizing monitoring of various standard spectra and spectral data according to claim 1, wherein the front diffuser plate and the rear diffuser plate are added with a purple light reinforcing agent and a blue light reinforcing agent for respectively reinforcing the passing rates of two sections of spectra of purple light 380-435 nm and blue light 450-480 nm.

5. The planar light source for realizing monitoring of multiple standard spectra and spectral data according to claim 1, wherein the LED lamp beads are of types including A light LED lamp beads, D50 light LED lamp beads and D65 light LED lamp beads.

6. The planar light source of claim 1, wherein the outer frame is located at an inner edge of the outer bottom plate, the outer bottom plate is a hollow structure, and the bottom surface of the outer bottom plate is sealed by the outer cover plate.

7. The planar light source for monitoring multiple standard spectra and spectral data according to claim 1, wherein the outer frame is provided with an outlet groove.

8. A planar light source device for monitoring multiple standard spectra and spectral data, comprising the planar light source, the controller and the computer as claimed in any one of claims 1 to 7, wherein the planar light source, the controller and the computer are connected in sequence;

the controller is used for acquiring spectral data of the planar light source, monitoring the actual color temperature, illumination and spectral data of the light source in real time, and controlling different types of LED lamp beads to emit required light sources;

the computer is used for manually or automatically adjusting the required color temperature, illumination and spectral value of the light source, and realizing closed-loop adjustment and control of the plane light source.

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