CN109708026B - Lighting lamp - Google Patents
Lighting lamp Download PDFInfo
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- CN109708026B CN109708026B CN201711406488.8A CN201711406488A CN109708026B CN 109708026 B CN109708026 B CN 109708026B CN 201711406488 A CN201711406488 A CN 201711406488A CN 109708026 B CN109708026 B CN 109708026B
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Abstract
The application provides an illuminating lamp, and illuminating light emitted by the illuminating lamp is provided with a first spectrum peak with the peak wavelength of 455-525 nm, a second spectrum peak with the peak wavelength of 535-615 nm and a third spectrum peak with the peak wavelength of 625-760 nm. The spectral peak of the illumination light is staggered with the three primary color peak of the common display equipment, so that the interference of the illumination light on a display picture is effectively reduced, and the visual perception is improved.
Description
Cross Reference to Related Applications
The present application claims priority from chinese patent application "201711006857.4 entitled" a lighting fixture and method of making "filed on 25/10/2017, the entire contents of which are incorporated herein by reference.
Technical Field
The application relates to the field of lighting, in particular to a lighting lamp.
Background
Light fixtures have become an essential device in human living environments, which can illuminate work and living places. With the great improvement of the life quality, higher requirements are put forward on the brightness, the color temperature and the like of the lamp.
People often need to adjust the intensity of ambient light to achieve better visual perception when watching display equipment such as televisions, computers and the like at night. However, the current lighting fixtures cannot achieve good visual perception.
Disclosure of Invention
The application aims to provide an illuminating lamp to solve the problem that the existing illuminating lamp cannot achieve good visual perception.
The application discloses illumination lamps and lanterns includes: the backlight source is used for emitting first light rays; a light conversion layer formed in an emission direction of the first light, the light conversion layer converting a part of the first light into a second light; the rest part of the first light and the second light are combined to form the illumination light of the illumination lamp; the illumination light has a first spectral peak having a peak wavelength of 455-525 nm, a second spectral peak having a peak wavelength of 535-615 nm, and a third spectral peak having a peak wavelength of 625-760 nm. The peak wavelengths of the blue, green and red primary colors of the existing common display device are respectively located at about 450 +/-5 nm, 530 +/-5 nm and 620 +/-5 nm. Because the illuminating light of the illuminating lamp and the display spectrum of the display device have different peak wavelengths, the interference of the illuminating light to the display picture of the display equipment can be reduced, and the visual perception is improved.
In one embodiment, the first light has a first spectral peak having a peak wavelength between 455nm and 525 nm; the second light has a second spectral peak having a peak wavelength between 535nm and 615nm and a third spectral peak having a peak wavelength between 625nm and 760 nm. The peak wavelength of the first spectral peak is preferably between 460nm and 480nm, the peak wavelength of the second spectral peak is preferably between 560nm and 580nm, and the peak wavelength of the third spectral peak is preferably between 640nm and 660nm, so that the degree of staggering from the primary color peak is increased, and the degree of overlap with the primary color peak is further reduced.
In one embodiment, the first, second and third spectral peaks each have a half-peak width of less than 60 nm. When the half-peak width of the spectral peak of the illumination light is small, the overlapping area of the illumination spectrum and the primary color peak in the display spectrum can be further reduced, so that the interference on the display picture is further reduced.
In one embodiment, the light conversion layer includes first quantum dots that emit a second spectral peak and second quantum dots that emit a third spectral peak. Because the quantum dots have the characteristic of easy adjustment of peak wavelength, half-peak width and the like, when the quantum dots are used as a light conversion material of a light conversion layer, an illumination spectrum staggered with a primary color peak of a display device is easily obtained by adjusting the element composition, the size and the like of the quantum dots.
In one embodiment, the first quantumThe dots and the second quantum dots are independently selected from CdxZn1-xSeyS1-yThe quantum dots or the InP quantum dots, wherein x is more than or equal to 0 and less than or equal to 1, and y is more than or equal to 0 and less than or equal to 1. By simply adjusting CdxZn1-xSeyS1-yThe value of x and y in the formula (I) can obtain the light conversion material which meets the requirement of the application that the emission peak covers the peak wavelength in the range of 440 nm-700 nm. And because the InP quantum dot does not contain heavy metal elements, the use of InP quantum dot is favorable to illumination lamps and lanterns in this application to environmental friendly development. In order to optimize the performance of the quantum dot, such as improving optical stability, reducing half-peak width and the like, the surface of the quantum dot can be further coated with a shell layer, and the shell layer material comprises ZnS, ZnSeS and the like.
In one embodiment, the first quantum dots are selected from InP quantum dots of 3-4nm, CdSeS quantum dots of 5-7nm, CdSe quantum dots of 2-3nm or CdZnSeS quantum dots of 7-9 nm; the second quantum dots are selected from InP quantum dots with the wavelength of 4-5nm, CdSeS quantum dots with the wavelength of 7-8nm, CdSe quantum dots with the wavelength of 4-5nm or CdZnSeS quantum dots with the wavelength of 8-10 nm.
In one embodiment, the mass ratio of the first quantum dots to the second quantum dots is 1-3: 1.
In one embodiment, the light conversion layer includes third quantum dots that emit a fourth spectral peak having a peak wavelength in the range of 530nm to 550 nm. By adding the third quantum dots, the color temperature of the illumination light can be further adjusted.
In one embodiment, the third quantum dot is selected from CdxZn1-xSeyS1-yThe quantum dots are/ZnS quantum dots or InP/ZnS quantum dots, wherein x is more than or equal to 0 and less than or equal to 1, and y is more than or equal to 0 and less than or equal to 1.
In one embodiment, the third quantum dots are selected from CdZnSe quantum dots with the wavelength of 7-9nm or InP quantum dots with the wavelength of 3-4 nm.
In one embodiment, the mass ratio of the first quantum dots, the second quantum dots and the third quantum dots is 1-3: 1: 2-10. Under the mass ratio range, the illumination light with the color temperature ranging from 3000K to 5000K can be obtained.
The application has the following beneficial effects: the spectrum peak of the illumination light emitted by the illumination lamp in the application has the peak wavelength different from the three primary colors of the conventional common display equipment, so that the interference on a display picture is reduced, and the visual perception is improved.
Drawings
Fig. 1 is a schematic structural diagram of a lighting fixture according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a lighting fixture according to an embodiment of the present disclosure;
FIG. 3 is a spectral diagram of a lighting fixture in an embodiment of the present application;
FIG. 4 is a display spectrum of a quantum dot television;
FIG. 5 is a spectral diagram of a lighting fixture in an embodiment of the present application;
fig. 6 is a spectral diagram of a lighting fixture in a comparative example of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described in detail below with reference to the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments in the present application, belong to the scope of protection of the present application.
It will be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated items.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.
As shown in fig. 1, the present application discloses an illumination device, which includes a backlight source 102, wherein the backlight source 102 is configured to emit a first light; a light conversion layer 104 is formed in the exit direction of the first light emitted from the backlight 102, and the light conversion layer 104 converts a part of the first light into a second light. The remaining portion of the first light and the second light combine to form the illumination light of the lighting fixture. The lighting light of the lighting lamp in the application has a first spectrum peak with the peak wavelength of 455-525 nm, a second spectrum peak with the peak wavelength of 535-615 nm and a third spectrum peak with the peak wavelength of 625-760 nm. The peak wavelengths of the primary color peaks of the typical display device are located at 450 + -5nm, 530 + -5nm, 620 + -5nm, whereas the illumination light of the illumination lamp in the present application has peak wavelengths of 455-525 nm, 535-615 nm, 625-760 nm. The illumination light and the primary color peak are staggered, so that the interference of the illumination lamp to the display picture of the display can be greatly reduced, and the visual perception is improved. In addition, to further deviate from the primary color peaks, the peak wavelength of the first spectral peak is preferably located between 460nm and 480nm, the peak wavelength of the second spectral peak is preferably located between 560nm and 580nm, and the peak wavelength of the third spectral peak is preferably located between 640nm and 660 nm.
The first light has a first spectral peak having a peak wavelength between 455nm and 525 nm. The first light passes through wavelength conversion layer 104 and is converted into a second light having a second spectral peak and a third spectral peak. The second light has a second spectral peak having a peak wavelength of 535nm to 615nm and a third spectral peak having a peak wavelength of 625nm to 760 nm. Further, the half-widths of the first, second and third spectral peaks are less than 60nm, more preferably less than 40 nm. When the half-peak width of the spectrum peak is reduced, the interference on a display picture can be further reduced, and the visual perception is improved.
Continuing with FIG. 1, in a preferred embodiment, wavelength-converting layer 104 includes first quantum dots 108 that emit a second spectral peak, and second quantum dots 110 that emit a third spectral peak. In addition, the wavelength conversion layer 104 includes a polymer matrix 106. The first quantum dots 108 and the second quantum dots 110 are uniformly dispersed in the polymer matrix 106.
Fig. 2 is a schematic view of a lighting fixture in another embodiment of the present application, the lighting fixture includes a substrate 201, a backlight source 102 carried on the substrate 201, a wavelength conversion layer 104 on the backlight source 102, and a lamp cover 202 fixed on the substrate 201 to cover the wavelength conversion layer 104.
The backlight 102 is preferably a blue LED. For example, a GaN or GaInN light emitting diode, as known to those skilled in the art, may be selected such that the first light has a first spectral peak having a peak wavelength in the range of 455nm to 525 nm. The first quantum dot 108 and the second quantum dot 110 are selected from CdxZn1-xSeyS1-yThe quantum dots are/ZnS quantum dots or InP/ZnS quantum dots, wherein x is more than or equal to 0 and less than or equal to 1, and y is more than or equal to 0 and less than or equal to 1. Preferably, the first quantum dots 108 are selected from InP quantum dots with the wavelength of 3-4nm, CdSeS quantum dots with the wavelength of 5-7nm, CdSe quantum dots with the wavelength of 2-3nm or CdZnSeS quantum dots with the wavelength of 7-9 nm. The second quantum dots 110 are selected from InP quantum dots with the wavelength of 4-5nm, CdSeS quantum dots with the wavelength of 7-8nm, CdSe quantum dots with the wavelength of 4-5nm or CdZnSeS quantum dots with the wavelength of 8-10 nm. The first quantum dots 108 and the second quantum dots 110 emit second light rays under the excitation of the first light rays, and the first light rays and the second light rays are combined to obtain the illumination spectrum. In a preferred embodiment, the mass ratio of the first quantum dots 108 to the second quantum dots 110 is 1 to 3: 1.
In order to adjust the color temperature of the illumination light of the illumination lamp, the light conversion layer also comprises third quantum dots which emit a fourth spectral peak, and the fourth spectral peak has a peak wavelength between 530nm and 550 nm. The third quantum dot is preferably CdxZn1-xSeyS1-yThe quantum dots are/ZnS quantum dots or InP/ZnS quantum dots, wherein x is more than or equal to 0 and less than or equal to 1, and y is more than or equal to 0 and less than or equal to 1. In a preferred embodiment, the third quantum dot is selected from CdZnSe quantum dots with the wavelength of 7-9nm or InP quantum dots with the wavelength of 3-4 nm. In a preferred embodiment, the mass ratio of the first quantum dot to the second quantum dot to the third quantum dot is 1-3: 1: 2-10.
The advantageous effects of the present application will be further described below with reference to examples and comparative examples.
Example 1
In the lighting fixture provided by this embodiment, the first quantum dots 108 are CdSe/ZnS quantum dots with a core particle diameter of about 3nm, the second quantum dots 110 are CdSe/ZnS quantum dots with a core particle diameter of about 5nm, a mass ratio of the first quantum dots 108 to the second quantum dots 110 is 2.2:1, and the backlight source 102 is a GaN light emitting diode with an emission peak at 455 nm.
The spectrum of the illumination light of the illumination lamp in this embodiment is shown in fig. 3. The color temperature of the corresponding illumination light in this embodiment is about 3000K.
The display spectrum of the existing common quantum dot television is tested, and the spectrum is shown in fig. 4.
The emission peak of the lighting fixture spectrum in fig. 3 is just staggered with the emission peak of the quantum dot television spectrum in fig. 4, reducing the interference to the display picture.
Example 2
Example 2 is substantially the same as example 1 except that: the first quantum dots 108 are CdSe/ZnS quantum dots with core particle diameters of about 3nm, the second quantum dots 110 are InP/ZnS quantum dots with core particle diameters of about 5nm, and the third quantum dots are CdZnSe/ZnS quantum dots with particle diameters of about 8 nm. The mass ratio of the first quantum dots to the second quantum dots to the third quantum dots is 2.5:1: 2.5.
The spectrum of the illumination light of the illumination lamp in this embodiment is shown in fig. 5. The color temperature of the corresponding illumination light in this embodiment is about 3973K.
The emission peak of the lighting fixture spectrum in fig. 5 is just staggered with the emission peak of the quantum dot television spectrum in fig. 4, reducing the interference to the display picture.
Comparative example 1
This comparative example provides a typical phosphor-based lighting fixture, with a backlight composed of a GaN light emitting diode with an emission peak at 450nm combined with YAG yellow phosphor, with a spectrum as shown in fig. 6.
The spectral peaks of the lighting fixture of fig. 6 largely overlap the emission peaks of the quantum dot television spectrum of fig. 4, with a large interference to the display spectrum.
As can be seen from the above embodiments 1, 2 and 1, the interference of the lighting fixture to the display spectrum of the display device is small, and the visual effect of the display screen is effectively improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of this invention are intended to be covered by the present application.
Claims (8)
1. A lighting fixture for reducing interference with a display screen of a quantum dot display device, comprising:
the backlight source is used for emitting first light rays;
a light conversion layer formed in an emission direction of the first light, the light conversion layer converting a part of the first light into a second light;
the rest of the first light and the second light are combined to form the illumination light of the illumination lamp;
the illumination light has a first spectral peak with a peak wavelength in the range of 455nm to 525nm, a second spectral peak with a peak wavelength in the range of 535nm to 615nm, and a third spectral peak with a peak wavelength in the range of 625nm to 760nm, the light conversion layer includes first quantum dots emitting the second spectral peak, second quantum dots emitting the third spectral peak;
the first light has a first spectral peak with a peak wavelength of 455-525 nm, the second light has a second spectral peak with a peak wavelength of 535-615 nm and a third spectral peak with a peak wavelength of 625-760 nm, and the first spectral peak, the second spectral peak and the third spectral peak are staggered with a spectral emission peak of the quantum dot display device.
2. A lighting fixture as recited in claim 1, wherein the first spectral peak, the second spectral peak, and the third spectral peak each have a half-peak width of less than 60 nm.
3. The lighting fixture of claim 1, wherein the first quantum dot and the second quantum dot are independently selected from CdxZn1-xSeyS1-yThe quantum dots or the InP quantum dots, wherein x is more than or equal to 0, and y is more than or equal to 1.
4. A lighting fixture as recited in claim 3, wherein the first quantum dots are selected from 3-4nm InP quantum dots, 5-7nm CdSeS quantum dots, 2-3nm CdSe quantum dots, or 7-9nm CdZnSeS quantum dots; the second quantum dots are selected from InP quantum dots with the wavelength of 4nm-5nm, CdSeS quantum dots with the wavelength of 7 nm-8 nm, CdSe quantum dots with the wavelength of 4nm-5nm or CdZnSeS quantum dots with the wavelength of 8 nm-10 nm.
5. The lighting fixture of claim 1, wherein the mass ratio of the first quantum dots to the second quantum dots is (1-3): 1.
6. The lighting fixture of claim 1 wherein the light conversion layer comprises third quantum dots that emit a fourth spectral peak having a peak wavelength in the range of 530nm-550 nm.
7. A lighting fixture as recited in claim 6, wherein the third quantum dots are selected from CdZnSe quantum dots at 7-9nm or InP quantum dots at 3-4 nm.
8. The lighting fixture of claim 6, wherein the mass ratio of the first quantum dots, the second quantum dots and the third quantum dots is (1-3):1 (2-10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711006857 | 2017-10-25 | ||
| CN2017110068574 | 2017-10-25 |
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| CN109708026A CN109708026A (en) | 2019-05-03 |
| CN109708026B true CN109708026B (en) | 2021-12-31 |
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