CN112594653A

CN112594653A - Color temperature adjustable high color rendering white light system and imaging device

Info

Publication number: CN112594653A
Application number: CN202011431705.0A
Authority: CN
Inventors: 黄荣丰; 陈志曼; 王国海
Original assignee: Guangzhou Yajiang Photoelectric Equipment Co Ltd
Current assignee: Guangzhou Yajiang Photoelectric Equipment Co Ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-04-02

Abstract

The invention provides a white light system with adjustable color temperature and high color rendering and imaging equipment. A white light imaging device comprising: the lamp bead plate, the condenser lens group, the light combining lens group, the imaging light hole and the imaging lens group; the lamp bead plate comprises 5 groups of lamp beads, and the 5 groups of lamp beads are mixed according to a fixed proportion to obtain white light; the condenser group focuses the light of the beads within 20 degrees; the light combining lens group further combines the light rays; the light is combined to the imaging light hole; the imaging lens group images the imaging light hole. According to the invention, the lamp beads are mixed according to a fixed proportion, so that the white light with high color rendering and variable color temperature is obtained on the premise of low power density of a light source and simple heat dissipation, and the white light also has a color effect.

Description

Color temperature adjustable high color rendering white light system and imaging device

Technical Field

The invention relates to the technical field of illumination, in particular to a color temperature adjustable high-color rendering white light system and imaging equipment.

Background

At present, a COB (chip on board, high power integrated surface) light source is generally used for high-quality white light in the market, and the color rendering index Ra (color rendering index) is more than 95 and the color rendering index R9 (ninth special color rendering index) is more than 95. However, the power density of the COB light source is high, the requirement on heat dissipation is high, the color temperature of the COB light source is not changeable, if different color temperatures are needed, a larger number of lamps are needed, and the application cost is increased. Therefore, on the premise of low power density of the light source and simple heat dissipation, the white light which has high color rendering property, variable color temperature and color effect becomes the technical problem to be solved at present.

Disclosure of Invention

The invention provides a white light system with adjustable color temperature and high color rendering and imaging equipment, which are used for solving the problems that in the prior art, on the premise of low light source power density, white light with higher color rendering and variable color temperature cannot be obtained, and meanwhile, the white light also has a color effect.

In a first aspect, the present invention provides a high color rendering white light system with tunable color temperature, comprising: 5 groups of lamp beads, 5 groups of lamp beads are mixed according to a fixed proportion to obtain white light.

Optionally, the 5 groups of light beads comprise red light beads, green light beads, blue light beads, amber light beads and grass green light beads; the fixed proportion comprises: the ratio of the red lamp beads to the green lamp beads to the blue lamp beads to the amber lamp beads to the grass green lamp beads is 4:9:6:17: 9; the blue lamp beads further comprise royalty blue lamp beads, and the ratio of the blue lamp beads to the royalty blue lamp beads is 1:1.

Optionally, 5 groups of beads are respectively powered by 5 independent drivers, and the drivers control the brightness of the 5 groups of beads.

Optionally, the color temperature of the white light is adjusted by changing the brightness of 5 groups of lamp beads.

Alternatively, if the 5 groups of beads have a brightness ratio of 100%: 20%: 12%: 28%: 28%, the color temperature of the white light is 3200K.

Alternatively, if the 5 groups of beads have a brightness ratio of 100%: 100%: 100%: 100%: 100%, the color temperature of the white light is 5600K.

Optionally, the color rendering index Ra of the white light is more than or equal to 95.

Alternatively, the ninth special color rendering index R9 of white light is 95 or more.

Optionally, the brightness of the red lamp bead is kept unchanged at 100%, the green lamp bead, the blue lamp bead, the amber lamp bead and the grass green lamp bead are reduced according to the ratio of 1:1.1:0.9:0.9, and the color temperature of the white light is adjusted, wherein the range of the color temperature of the white light comprises 3200-.

On the other hand, the invention provides a color temperature adjustable white light imaging device with high color rendering, which comprises a lamp bead plate, a condenser lens, a light combining lens, an imaging light hole and an imaging lens group; the lamp bead plate comprises 5 groups of lamp beads, and the 5 groups of lamp beads are mixed according to a fixed proportion to obtain white light; the light combining lens group further combines the light rays; the light is combined to the imaging light hole; the imaging lens group images the imaging light hole.

According to the technical scheme, the white light is obtained by mixing 5 groups of lamp beads and 5 groups of lamp beads according to a fixed proportion. According to the invention, the lamp beads are mixed according to a fixed proportion, so that the white light with higher color rendering and variable color temperature is obtained on the premise of low power density of a light source and simple heat dissipation, and the white light also has a color effect.

Drawings

Fig. 1 is a schematic structural diagram of a high color rendering white light system with adjustable color temperature according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a white light imaging device with adjustable color temperature and high color rendering according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 shows a schematic structural diagram of a color temperature adjustable high-color rendering white light system according to an embodiment of the present invention, and as shown in fig. 1, the white light system of this embodiment has the following structure, where R represents a red bead, G represents a green bead, B represents a blue bead, a represents an amber bead, and L represents a grass green bead.

In a specific embodiment, the color temperature adjustable high-color rendering white light system comprises 5 groups of light beads, a red light bead, a green light bead, a blue light bead, an amber light bead and a grass green light bead, wherein the 5 groups of light beads are mixed according to a fixed proportion of 4:9:6:17:9, and the blue light bead further comprises a royalty blue light bead, wherein the proportion of the blue light bead to the royalty blue light bead is 1:1. As shown in fig. 1, 8 red beads, 18 green beads, 12 blue beads, 34 amber beads and 18 grass green beads, wherein the blue beads further comprise 6 royalty blue beads and 6 blue beads, the 5 groups of beads have large luminous area, low power density, large interval between every two beads and simple heat dissipation.

In specific embodiment, 5 groups of lamp beads are supplied power by 5 independent drivers respectively, and 5 groups of lamp bead luminance can be controlled alone to the driver, for example 5 independent drivers are controlled by the control channel, and colored effect can be realized to every group lamp bead individual control. The control channel controls the brightness of 5 groups of lamp beads by adjusting the current of the driver, so that high color rendering white light with different color temperatures can be obtained, and the color temperature range comprises 3200K-5600K.

In the specific embodiment, if the brightness ratio of 5 groups of lamp beads is controlled to be 100%: 20%: 12%: 28%: 28%, 3200K of white light with high color rendering property and color temperature can be obtained; if the brightness ratio of 5 groups of lamp beads is controlled to be 100%: 100%: 100%: 100%: 100%, the full-bright color temperature of all the lamp beads is close to 5600K, the color rendering index Ra of the white light is more than or equal to 95, and R9 is more than or equal to 95; if the red lamp bead is controlled to keep the brightness unchanged at 100%, the green lamp bead, the blue lamp bead, the amber lamp bead and the grass green lamp bead are reduced according to the proportion of 1:1.1:0.9:0.9, and the 3200-5600K-doped white light with high color rendering property can be obtained.

Fig. 2 is a schematic structural diagram illustrating a color temperature adjustable white light imaging device with high color rendering according to an embodiment of the present invention, and as shown in fig. 2, the white light imaging device of the embodiment includes: the device comprises a lamp bead plate 21, a condenser lens group 22, a light combination lens group 23, an imaging light hole 24 and an imaging lens group 25.

The lamp bead plate 21 comprises 5 groups of lamp beads, namely a red lamp bead, a green lamp bead, a blue lamp bead, an amber lamp bead and a grass green lamp bead, and white light is obtained by mixing according to the proportion of 4:9:6:17: 9; the condenser lens group 22 comprises light guide beams which are in one-to-one correspondence with the lamp beads on the lamp bead plate 21, and the aperture of a light inlet of each light guide beam is smaller than that of a light outlet, so that more than 90% of light of the lamp beads on the lamp bead plate 21 enters the condenser lens group 22 to focus the light within 20 ℃; the light combining lens group 23 further combines the light rays of the 5 groups of lamp beads to form uniform light spots; the light is combined to the imaging light hole 24, the imaging lens group 25 images the image of the imaging light hole 24 on a distant screen, the image is clear, the light spots are uniform, and the light combining lens group 23 can comprise a fresnel lens.

The white light with the color rendering indexes Ra and Ra above 95 is obtained, the color temperature ranging from 3200K to 5600K can be achieved, and the changed color temperature is also high in color rendering index. The lamp bead plate 21 is large in light-emitting area, low in power density, large in distance between every lamp beads, simple in heat dissipation, capable of achieving colored effect due to the fact that color beads of each group are independently controlled, different color temperatures can be used for different scenes, such as theaters, theaters and other places, and the same lamp can have more functions and reduce cost.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

Those of ordinary skill in the art will understand that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions and scope of the present invention as defined in the appended claims.

Claims

1. The white light system with the adjustable color temperature and the high color rendering is characterized by comprising 5 groups of lamp beads, wherein the 5 groups of lamp beads are mixed according to a fixed proportion to obtain white light.

2. The white light system of claim 1, wherein the 5 sets of light beads include a red light bead, a green light bead, a blue light bead, an amber light bead, and a grass green light bead;

the fixed ratio comprises: the ratio of the red lamp beads to the green lamp beads to the blue lamp beads to the amber lamp beads to the grass green lamp beads is 4:9:6:17: 9;

the blue lamp beads further comprise royalty blue lamp beads, and the ratio of the blue lamp beads to the royalty blue lamp beads is 1:1.

3. The white light system of claim 1, wherein the 5 groups of beads are each powered by 5 independent drivers that control the brightness of the 5 groups of beads.

4. The white light system of claim 1, further comprising: and adjusting the color temperature of the white light by changing the brightness of the 5 groups of lamp beads.

5. The white light system of claim 4, wherein the adjusting the color temperature of the white light by changing the brightness of the 5 groups of light beads comprises: if the brightness ratio of the 5 groups of lamp beads is 100%: 20%: 12%: 28%: 28%, the color temperature of the white light is 3200K.

6. The white light system of claim 4, wherein the adjusting the color temperature of the white light by changing the brightness of the 5 groups of light beads comprises: if the brightness ratio of the 5 groups of lamp beads is 100%: 100%: 100%: 100%: 100%, the color temperature of the white light is 5600K.

7. The white light system of claim 6, further comprising: the color rendering index Ra of the white light is more than or equal to 95.

8. The white light system of claim 6, further comprising: the ninth special color rendering index R9 of the white light is more than or equal to 95.

9. The white light system of claim 4, wherein the 5 sets of beads adjust the color temperature of the white light by changing brightness, comprising:

the red lamp beads keep the brightness of 100% unchanged, the green lamp beads, the blue lamp beads, the amber lamp beads and the grass green lamp beads are reduced according to the proportion of 1:1.1:0.9:0.9, the color temperature of the white light is adjusted, and the range of the color temperature of the white light comprises 3200-.

10. A color temperature tunable high color rendering white light imaging device comprising: the lamp bead plate, the condenser lens group, the light combining lens group, the imaging light hole and the imaging lens group;

the lamp bead plate comprises 5 groups of lamp beads, and the 5 groups of lamp beads are mixed according to a fixed proportion to obtain white light; the condenser group focuses the light of the lamp bead within 20 degrees; the light combining lens group further combines the light rays; the light is combined to the imaging light hole; the imaging lens group images the imaging light hole.