CN115561931B - Quantum dot backlight module, backlight device and manufacturing method - Google Patents
Quantum dot backlight module, backlight device and manufacturing method Download PDFInfo
- Publication number
- CN115561931B CN115561931B CN202211011588.1A CN202211011588A CN115561931B CN 115561931 B CN115561931 B CN 115561931B CN 202211011588 A CN202211011588 A CN 202211011588A CN 115561931 B CN115561931 B CN 115561931B
- Authority
- CN
- China
- Prior art keywords
- color
- point
- coordinate
- backlight module
- wavelength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002096 quantum dot Substances 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000010586 diagram Methods 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 15
- 239000003086 colorant Substances 0.000 claims description 11
- 239000000049 pigment Substances 0.000 claims description 8
- 238000002834 transmittance Methods 0.000 description 24
- 241000519995 Stachys sylvatica Species 0.000 description 7
- 238000005457 optimization Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000001525 retina Anatomy 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
-
- 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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
-
- 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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a quantum dot backlight module, a backlight device and a manufacturing method, wherein the quantum dot backlight module in one embodiment comprises a backlight source and a color film layer arranged on the backlight source; the color film layer comprises blue color resistance, red color resistance and green color resistance, the blue color resistance, the red color resistance and the green color resistance form corresponding color points in the horseshoe-shaped color gamut diagram, and the red color points comprise: a first color coordinate in a first direction, and a second color coordinate in a second direction; the green color point comprises: a third color coordinate in the first direction, and a fourth color coordinate in the second direction; the blue color point comprises: a fifth color coordinate in the first direction, and a sixth color coordinate in the second direction; wherein in the first direction, the first color coordinate is greater than the third color coordinate and greater than the fifth color coordinate; in the second direction, the fourth color coordinate is greater than the second color coordinate and greater than the sixth color coordinate.
Description
Technical Field
The invention relates to the technical field of display. More particularly, to a quantum dot backlight module, a backlight device and a manufacturing method thereof.
Background
With the development of quantum dot technology, quantum Dot (QD) backlight is increasingly being used. The QD backlight is formed by adding a quantum dot film layer, such as a blue LED (light emitting diode), on a backlight film layer, and exciting red and green quantum dots by using the blue LED to generate red and green light, thereby further forming white light.
In the product design of the quantum dot backlight module of the related art, the product design is generally based on a fixed QD backlight module, and the color gamut is improved by setting a color film with a larger thickness on the QD backlight module, but the setting can lead to the transmittance of the quantum dot backlight module to be reduced.
Disclosure of Invention
The invention aims to provide a quantum dot backlight module, a backlight device and a manufacturing method thereof, which are used for solving at least one of the problems in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the first aspect of the invention provides a quantum dot backlight module, which comprises a backlight source and a color film layer arranged on the backlight source;
the color film layer comprises blue color resistance, red color resistance and green color resistance,
the blue color resistance, the red color resistance and the green color resistance form corresponding color points in a horseshoe-shaped color gamut diagram,
the red color point comprises: a first color coordinate in a first direction, and a second color coordinate in a second direction;
the green color point comprises: a third color coordinate in the first direction, and a fourth color coordinate in the second direction;
the blue color point comprises: a fifth color coordinate in the first direction, and a sixth color coordinate in the second direction;
wherein,
in the first direction, the first color coordinate is greater than the third color coordinate and greater than the fifth color coordinate;
in the second direction, the fourth color coordinate is greater than the second color coordinate and greater than the sixth color coordinate.
Further, the horseshoe-shaped color gamut graph comprises an equivalent white spot, the color point of each color and the connecting line of the equivalent white spot extend reversely and form an intersection point with the boundary line of the horseshoe-shaped color gamut graph, the connecting line of the intersection point and the equivalent white spot is the color point wavelength of the color,
the wavelength at the peak position of each color of the backlight module and the color point wavelength of the corresponding color meet a first corresponding relation,
the first corresponding relation is as follows:
(λ color point of color film +λ Backlight wave crest )/2＝λ Color gamut standard color point ±10nm，
Wherein lambda is Color point of color film For the color point wavelength lambda Backlight wave crest Is the peak wavelength lambda of the backlight module Color gamut standard color point Is the color point wavelength of the corresponding color in the standard color gamut.
Further, the preset color temperature value and the stimulus value of each color point satisfy the second corresponding relation,
the second corresponding relation is as follows:
Wx＝WX/(WX+WY+WZ)，Wy＝WY/(WX+WY+WZ)，
wherein Wx is a first preset color temperature value, wy is a second preset color temperature value,
WX is a first stimulus value, WY is a second stimulus value, and WZ is a third stimulus value.
Further, the color point wavelength of the red color point is 625+/-50 nm,
the color point wavelength of the green color point is 540+/-50 nm
The color point wavelength of the blue color point is 455+ -50 nm.
Further, the first color coordinate is 0.639+ -0.1, and the second color coordinate is 0.352+ -0.1;
the third color coordinate is 0.313+/-0.1, and the fourth color coordinate is 0.606+/-0.1;
the fifth color coordinate is 0.1400.06, and the fifth color coordinate is 0.091+/-0.1.
Further, when the first color coordinate is 0.639 and the second color coordinate is 0.352, the red color point of the backlight module is (0.679,0.313),
the third color coordinate is 0.313, and when the fourth color coordinate is 0.606, the green color point of the backlight module is G (0.255,0.706),
the fifth color coordinate is 0.140, when the fifth color coordinate is 0.091, the blue color point of the backlight module is G B (0.150,0.053), the peak length of the blue color of the backlight module is 452nm, the peak length of the green color of the backlight module is 538nm, and the peak length of the red color of the backlight module is 626nm;
and/or
When the color temperature value is (0.28,0.29), the intensity ratio of the red light, the green light and the blue light of the backlight module determined according to the stimulus value is 1.385:1.046:1.
Further, the red color resistance is a pigment material or a dye material,
the green color resist is pigment material or dye material, and
the blue resistor is a dye material.
The second aspect of the present invention provides a method for manufacturing a quantum dot backlight module, including:
forming a backlight
Forming a color film layer on the backlight source, wherein the color film layer comprises a blue color resistor, a red color resistor and a green color resistor;
the blue color resistance, the red color resistance and the green color resistance form corresponding color points in the horseshoe-shaped color gamut diagram, and the red color points comprise: a first color coordinate in a first direction, and a second color coordinate in a second direction;
the green color point comprises: a third color coordinate in the first direction, and a fourth color coordinate in the second direction;
the blue color point comprises: a fifth color coordinate in the first direction, and a sixth color coordinate in the second direction;
forming a color film layer on the backlight further comprises:
in the first direction, such that the first color coordinate is greater than the third color coordinate and greater than the fifth color coordinate;
in the second direction, the fourth color coordinate is made larger than the second color coordinate and larger than the sixth color coordinate and smaller than the sixth color coordinate.
Further, the method further comprises:
determining a color point wavelength and a peak wavelength corresponding to the color point according to the color point of each color;
determining peak intensities of different colors according to the color point wavelength, the peak wavelength, the preset color temperature value and a second corresponding relation with the stimulus value;
and obtaining the intensity ratio of the backlight module according to the peak intensities of the different colors.
A third aspect of the present invention provides a quantum dot display device, the display device comprising a backlight module according to any one of the first aspect of the present invention.
The beneficial effects of the invention are as follows:
according to the quantum dot backlight module provided by the embodiment of the invention, the color coordinates of the color resistance of the color film are optimized, so that the transmittance of the color resistance of the color film is improved, and the overall transmittance of the quantum dot backlight module is further improved, so that high-color-gamut display can be realized, and the quantum dot backlight module has good transmittance.
Drawings
The following describes the embodiments of the present invention in further detail with reference to the drawings.
FIG. 1 shows a schematic view of the structure of a backlight according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing color point positions of color resistors of a color film layer according to an embodiment of the present invention;
FIG. 3 shows a schematic diagram of a position comparison of color resistance points and standard color gamut points of an embodiment of the present invention;
FIG. 4 is a schematic diagram showing the comparison of parameters of color resistances of color films according to an embodiment of the present invention and color resistances of color films according to related art;
FIG. 5 is a schematic diagram showing the comparison of parameters of color resistances of color films according to an embodiment of the present invention and color resistances of color films according to related art;
FIG. 6 shows a schematic diagram of the structure of wavelength and color point locations in a horseshoe-shaped color gamut diagram of an embodiment of the present invention;
FIG. 7 is a schematic diagram of the color point wavelengths and standard color gamut wavelengths of a color film resistor according to an embodiment of the present invention;
fig. 8 shows a schematic diagram of peak and intensity of a backlight module according to an embodiment of the invention.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be further described with reference to examples and drawings. Like parts in the drawings are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and that this invention is not limited to the details given herein.
The first embodiment of the present invention provides a quantum dot backlight module, as shown in fig. 1, which includes a quantum dot backlight source and a color film layer disposed on the quantum dot backlight source.
In a specific example, as shown in fig. 1, the backlight 1 includes: the light source device includes a light guide plate 12 provided on a light source 11, an antireflection film 13 provided on the light guide plate 12, a quantum dot film 14 provided on the antireflection film 13, a prism sheet 15 provided on the quantum dot film 14, and a brightness enhancement film (DBEF) 16 provided on the prism sheet 15.
The color film layer comprises a red color resistor 21, a green color resistor 22 and a blue color resistor 23, as shown in fig. 2, the red color resistor 21, the green color resistor 22 and the blue color resistor 23 form corresponding color points in the horseshoe-shaped color gamut diagram,
the red color point 21R includes: a first color coordinate in a first direction, and a second color coordinate in a second direction;
the green color point 22G includes: a third color coordinate in the first direction, and a fourth color coordinate in the second direction;
the blue color point 23B includes: a fifth color coordinate in the first direction, and a sixth color coordinate in the second direction;
wherein,
in the first direction, the first color coordinate is greater than the third color coordinate and greater than the fifth color coordinate;
in the second direction, the fourth color coordinate is greater than the second color coordinate and greater than the sixth color coordinate.
According to the embodiment of the invention, the color points of the color resistances of different colors are designed, the positions of the color points of the red color resistance, the green color resistance and the blue color resistance in the horseshoe-shaped color gamut graph are set, so that in the first direction (X direction), the first color coordinate of the red color resistance is larger than the third color coordinate of the green color resistance and is larger than the fifth color coordinate of the blue color resistance, and in the second direction (Y direction), the fourth color coordinate of the green color resistance is larger than the second color coordinate of the red color resistance and is larger than the sixth color coordinate of the blue color resistance, and the purposes of reducing the color points and improving the transmittance are realized through the setting.
In an alternative embodiment, for the red color point 21R, the first color coordinate is 0.639±0.1 and the second color coordinate is 0.352±0.1; for green color point 22G, the third color coordinate is 0.313±0.1 and the fourth color coordinate is 0.606±0.1; for blue color point 23B, the fifth color coordinate is 0.140±0.06 and the sixth color coordinate is 0.091±0.1.
In the embodiment, the color point position of the red color resistor, the color point position of the green color resistor and the color point position of the blue color resistor are specifically designed, and the color points of the color resistors are used as design criteria within the range to form the color film layer, so that the formed color film layer has lower color points and higher transmittance.
In an alternative embodiment, the first color coordinate is 0.639, the second color coordinate is 0.352, the red color point of the backlight module is (0.679,0.313), the third color coordinate is 0.313, the red green color point of the backlight module is G (0.255,0.706) when the fourth color coordinate is 0.606, the fifth color coordinate is 0.140, and the blue color point of the backlight module is B (0.140,0.091) when the sixth color coordinate is 0.091.
In this embodiment, as shown in fig. 3, taking each color point of the color film color resistor of the present embodiment as an example, the position of each color point of the color film color resistor in the horseshoe-shaped color gamut diagram is shown in fig. 3, the position of each color point of a backlight module formed by assembling the color film color resistor set by the color point and the backlight source in the horseshoe-shaped color gamut diagram is shown in fig. 3, and the standard color point of each color of the DCI color gamut standard is also shown in fig. 3. As shown in fig. 3, in the DCI standard color gamut, the standard red color point, the standard blue color point and the standard green color point are connected to form a triangular standard color gamut region, and the area of the color gamut region of the backlight module formed by the color points of the backlight module assembled by the backlight module and the color film color point group in this embodiment is larger than the area of the standard color gamut region, and each color point of the backlight module in this embodiment is located outside the color point corresponding to the standard color gamut, that is, each color point of the backlight module in this embodiment is better than the standard color point, and has good transmittance.
In a specific example, as shown in fig. 4, taking the red color point 21R, the first color coordinate Rx is 0.639, the second color coordinate Ry is 0.352 as an example, taking the green color point 22G, the third color coordinate Gx is 0.313, the fourth color coordinate Gy is 0.606 as an example, taking the blue color point 23B, the fifth color coordinate Bx is 0.140, and the sixth color coordinate By is 0.091 as an example, compared with the color point design (Normal CF) of the related art color film layer, the red luminance Ry, the green luminance Gy, the blue luminance By, and the screen luminance WY of the color film layer of the backlight module of the present embodiment are all improved, the red luminance Ry is improved to 26.19, the red luminance Gy is improved to 26.19, the green luminance Gy is improved to 55.60 to 63, the blue luminance is improved to 11.66, and the overall luminance is improved to 11.33.66, and each of the blue luminance is improved to 11.33.
Further, referring to fig. 5, the abscissa indicates the wavelength, and the ordinate indicates the transmittance, and it can be seen that the transmittance of the red, blue and green of the backlight module of the embodiment is improved compared with that of the backlight module of the prior art when the backlight module of the embodiment is compared with that of the backlight module of the prior art at the peak positions of each color.
As shown in fig. 6, a horseshoe-shaped color gamut diagram is shown under black and white lines, the horseshoe-shaped color gamut diagram comprising iso-white spots, the first direction being the X-direction and the second direction being the Y-direction, the second direction being perpendicular to the first direction. The isoelectric white light point is located at the middle position of the horseshoe-shaped color gamut diagram, and the coordinates of the isoelectric white light point in the horseshoe-shaped color gamut diagram are (0.333) by way of example,
the boundary of the horseshoe-shaped color gamut diagram positioned at the outermost side and the isoenergetic white light point form a plurality of connecting lines representing wavelengths by taking the isoenergetic white light point as a central point, wherein the wavelength corresponding to the connecting line is the color gamut standard wavelength.
The wavelengths at the various locations on the same connection line are the same, i.e. the wavelengths at all points on the connection line 9 are the same value. The higher the purity of the color points farther from the position of the isocratic white spot on the same connecting line, that is, the different purities of the color points at different positions of the same connecting line in this embodiment, the darker the color of the color point near the edge of the horseshoe-shaped color gamut map, the lighter the color of the color point near the isocratic white spot located at the center, and the closer to white.
In an alternative embodiment, as shown in fig. 7, the color point of each color extends in opposite directions from the line connecting the isocratic white spots and forms an intersection with the boundary line of the horseshoe-shaped gamut, and the line connecting the intersection with the isocratic white spots is the color point wavelength of the color. Illustratively, taking a green color point of a green color resistor as an example, the green color point is connected with an isoelectric white light point and extends a connecting line reversely to the boundary of the horseshoe-shaped color gamut graph, so as to form a wavelength track corresponding to the color point, and an exemplary wavelength corresponding to the green color point is 538nm.
In an alternative embodiment, as shown in fig. 7, the peak wavelength at the peak position of each color of the backlight module and the color point wavelength of the corresponding color satisfy a first corresponding relationship,
the first corresponding relation is as follows: (lambda) Color point of color film +λ Backlight wave crest )/2＝λ Color gamut standard color point ±10nm，
Wherein lambda is Color point of color film For the color point wavelength lambda Backlight wave crest Is the peak wavelength lambda of the backlight module Color gamutStandard color point Is the color point wavelength of the corresponding color in the standard color gamut.
As shown in fig. 7, taking the green color point of the green resistor as an example, lambda Color point of color film The color point wavelength of the color gamut standard color point shown in fig. 7. Based on the same principle, taking a green color gamut standard point as an example, connecting the green color gamut standard point with an iso-energy white light point to form a connecting line, wherein the connecting line extends reversely and forms an intersection point with the boundary of the horseshoe-shaped color gamut graph, and the wavelength corresponding to the connecting line track is the color point wavelength of the green color gamut standard point.
According to the above formula, the present embodiment can be based on the known lambda Color point of color film Known lambda Color gamut standard color point Thereby determining the peak wavelength of the backlight module.
In an alternative embodiment, the red color point has a color point range Rx of 0.639+ -0.1, ry of 0.352+ -0.1, the red color point has a color point wavelength of 625+ -50 nm, the green color point has a color point range Gx of 0.313+ -0.1, gy of 0.606+ -0.1, the green color point has a color point wavelength of 540+ -50 nm, and the blue color point has a color point range Bx of 0.140+ -0.06, by of 0.091+ -0.1, and the blue color point has a color point wavelength of 455+ -50 nm.
Based on the color point design capable of improving the transmittance of the embodiment, the embodiment further realizes the design of the color point wavelength through the corresponding relation between the color point wavelength and the color point position, so that the transmittance of the color film color resistor is improved, the overall transmittance of the quantum dot backlight module is further improved, high-color-gamut display can be realized, and the quantum dot backlight module has good transmittance.
In an alternative embodiment, the color points of the color film module are taken as embodiments, namely: the color point of the red color resistor is Rx of 0.639, ry of 0.352, the peak length of red of the backlight module is 626nm according to the formula, the color point of green color resistor is Gx of 0.313, gy of 0.606, the peak length of green of the backlight module is 538nm according to the formula, the color point of blue color resistor is Bx of 0.140, by of 0.091, and the peak length of blue of the backlight module is 452nm. In this embodiment, based on the color point wavelength obtained by the color point position, the peak position of each color of the backlight module is optimally designed according to the corresponding relationship between the color point wavelength of the color film color resistor and the backlight module, so that the peak position of the backlight module is matched with the spectrum of each color point of the color film color resistor, thereby achieving the purpose of improving the color gamut and transmittance of the backlight module.
Based on the optimization of the color points of the color resistances of the colors of the color film layers, the embodiment of the invention improves the transmittance of the color film layers, and further, the implementation further optimizes the color gamut and the transmittance of the backlight module by matching the peak positions of the backlight module with the color points of the color resistances of the colors of the color film layers, and further designs the intensity ratio of each color of the backlight module and further improves the color gamut and the transmittance of the backlight module. The following modes are adopted:
in an alternative embodiment, the preset color temperature value and the stimulus value of the respective color point satisfy the second correspondence.
In this embodiment, the preset color temperature value is the color temperature that is perceived to be optimal by the human eye, and when the backlight module displays the color temperature, the display effect is better, and the experience of the user is improved. In a specific example, the preset color temperature values include an x-direction color temperature (i.e., a first preset color temperature value), such as wx=0.28±0.01, and also include a y-direction color temperature (i.e., a second preset color temperature value), such as wy=0.29±0.01.
The stimulus value represents the stimulus level of three primary colors causing the retina to feel a certain color, and in this embodiment, the stimulus value is related to the peak wavelength of the backlight module, the color point wavelength of the color resistance of the color film, and the intensity at the position of the peak wavelength. In a specific example, the intensity of the product of the peak wavelength of the backlight module and the color point wavelength of the color resistance of the color film at the position of the peak wavelength is integrated to obtain the stimulus value of the application.
In this embodiment, the second correspondence between the preset color temperature value and the tristimulus value of the backlight module is:
a first preset color temperature value wx=wx/(wx+wy+wz),
a second preset color temperature value wy=wy/(wx+wy+wz),
wherein WX is a first stimulus value, WY is a second stimulus value, and WZ is a third stimulus value, namely X, Y under CIE RGB system and a tri stimulus value in Z direction.
In a specific example, the first stimulus value wx= (rx+gx+bx)/3, where RX is a stimulus value of the red color of the backlight module in the X direction under the CIE RGB system, GX is a stimulus value of the green color of the backlight module in the X direction under the CIE RGB system, and BX is a stimulus value of the blue color of the backlight module in the X direction under the CIE RGB system.
And the second stimulus value WY= (RY+GY+BY)/3, wherein RY is the stimulus value of the red color of the backlight module in the Y direction under the CIE RGB system, GY is the stimulus value of the green color of the backlight module in the Y direction under the CIE RGB system, and BY is the stimulus value of the blue color of the backlight module in the Y direction under the CIE RGB system.
And a third stimulus value WZ= (RZ+GZ+BZ)/3, wherein RZ is a stimulus value of a red color of the backlight module in the Z direction under the CIE RGB system, GZ is a stimulus value of a green color of the backlight module in the Z direction under the CIE RGB system, and BZ is a stimulus value of a blue color of the backlight module in the Z direction under the CIE RGB system.
Exemplary, the peak intensities, the preset constant values, the preset wavelengths and the color film intensities determined according to the color point wavelengths of RX, GX, BX, RY, GY, BY, RZ, GZ and BZ and the backlight module satisfy a third corresponding relationship, namely:
wherein T is (λ,BL) For the intensity value of the backlight module, m (lambda), x (lambda), y (lambda) and z (lambda) are constants related to lambda, T (λ,RCF) 、T (λ,GCF) And T (λ,BCF) The color resistance intensity value is determined according to the color points of the color resistances of the color film layers.
In a specific example, T (λ,RCF) For the intensity value of the red color resistance, in a specific example, based on the color point design of the previous embodiment, the spectrum of the color resistance may be determined, and the intensity value of the red color resistance may be further determined according to the spectrum of the red color resistance. Similarly, the intensity value T of the green resistor (λ,GCF) Intensity value T of blue resistor (λ,BCF) All can be obtained by the same distance.
Thus, the formula of the first stimulus value WX, the second stimulus value WY, the third stimulus value WZ and the stimulus value of each color in the corresponding direction can be further deduced to determine:
(RX+GX+BX)/(R X+GX+BX+RY+GY+BY+RZ+GZ+BZ)＝Wx；
(RY+GY+BY)/(RX+GX+BX+RY+GY+BY+RZ+GZ+BZ)＝Wy。
taking the aforementioned wx=0.28, wy=0.29 as an example,
(RX+GX+BX)/(R X+GX+BX+RY+GY+BY+RZ+GZ+BZ)＝0.28；
(RY+GY+BY)/(RX+GX+BX+RY+GY+BY+RZ+GZ+BZ)＝0.29；
based on the second corresponding relation, the intensity value of the backlight module corresponding to each color can be determined, so that the RGB intensity ratio of the backlight module is obtained.
Based on the foregoing embodiments, the present embodiment designs the intensity ratio of each color of the backlight module, and uses the correspondence between the peak intensity of each color of the backlight module and the stimulus value, and further optimizes the RGB relative intensity obtained according to the second correspondence on the basis of the foregoing implementation of color point optimization of color resistance of the color film and peak optimization of the backlight module, so as to implement spectral matching between the intensity ratio of the backlight module and the color film layer, thereby further improving the color gamut and transmittance of the backlight module.
In a specific example, as shown in fig. 8, the abscissa is the wavelength, the ordinate is the intensity value, when the preset color temperature value is (0.28,0.29), the RGB three-color intensity ratio of the backlight determined according to the aforementioned second correspondence is 1.385:1.046:1, the peak length of the green color of the backlight module is 538nm, the peak length of the blue color of the backlight module is 452nm, and the peak length of the red color of the backlight module is 626nm, so that the backlight module based on the color resistance and the peak setting of the color point design has high matching, high color gamut and high transmittance.
In an alternative embodiment, the red color resist is a Pigment material or a Dye material, the green color resist is a Pigment material or a Dye material, and the blue color resist is a Dye material. In this embodiment, by setting the materials of each color resistor of the color film, a mixed design of pigment materials and dye materials is adopted, for example, the red color resistor and the green color resistor are pigment materials, the blue color resistor is dye material, and for example, the red color resistor, the green color resistor and the blue color resistor are all color materials, that is, the blue color resistor in this embodiment is dye material as a design rule, so as to realize a matching design with the materials of other color resistors, thereby improving the transmittance of the color film color resistor and further improving the backlight module.
Another embodiment of the present invention provides a method for fabricating a QD backlight, the method comprising:
forming a backlight
Forming a color film layer on the backlight source, wherein the color film layer comprises a blue color resistor, a red color resistor and a green color resistor;
the blue color resistance, the red color resistance and the green color resistance form corresponding color points in the horseshoe-shaped color gamut diagram, and the red color points comprise: a first color coordinate in a first direction, and a second color coordinate in a second direction; the green color point comprises: a third color coordinate in the first direction, and a fourth color coordinate in the second direction; the blue color point comprises: a fifth color coordinate in the first direction, and a sixth color coordinate in the second direction.
In one specific example, as shown in fig. 1, forming the backlight includes:
a light guide plate is formed on a light source, an antireflection film is formed on the light guide plate, a quantum dot film is formed on the antireflection film, a prism sheet is formed on the quantum dot film, and a brightness enhancement film (DBEF) is formed on the prism sheet.
In an alternative embodiment, forming the color film layer on the backlight further includes:
in the first direction, such that the first color coordinate is greater than the third color coordinate and greater than the fifth color coordinate;
in the second direction, the fourth color coordinate is made larger than the second color coordinate and larger than the sixth color coordinate.
The purpose of reducing the color point of the backlight module and improving the transmittance is achieved through the design.
In an alternative embodiment, the method further comprises:
determining a color point wavelength and a peak wavelength corresponding to the color point according to the color point of each color;
determining peak intensities of different colors according to a second corresponding relation between the preset color temperature value and the stimulus value;
and obtaining the intensity ratio of the backlight module according to the peak intensities of the different colors.
In a specific example, on the basis of determining the color coordinates of the color points of each color, the color point wavelength of the corresponding color point is determined according to the position of each color point in the horseshoe-shaped color gamut diagram, and further, the peak wavelength of the backlight module can be obtained according to the first corresponding relation.
In another specific example, the stimulus value is an integral function related to the peak intensity, and the corresponding relation between the preset color temperature value and the stimulus value can be established according to the second corresponding relation, so that the backlight module design with the matched color resistance of the color film and the backlight module is obtained.
The backlight module and the manufacturing method thereof of the embodiment of the invention optimize the color points of the color resistances of the various colors of the color film layer, and further match the peak position of the backlight module with the color points of the color resistances of the color film, the embodiment further designs the intensity ratio of each color of the backlight module, improves the transmittance of the color film layer, optimizes the color gamut and the transmittance of the backlight module, and effectively improves the color gamut and the transmittance of the backlight module.
It should be noted that, the specific embodiments of the method for manufacturing a backlight according to the embodiment of the present invention can refer to the backlight module of the foregoing embodiment, and will not be described herein.
Another embodiment of the present invention provides a quantum dot display device, where the display device includes the backlight module according to the foregoing embodiment of the present invention, and the display device according to the embodiment of the present invention may be any product or component that needs a quantum dot backlight module, such as a cell phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a vehicle-mounted display device, etc., which is not limited in this embodiment of the present invention.
In the description of the present invention, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It should be understood that the foregoing examples of the present invention are provided merely for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention, and that various other changes and modifications may be made therein by one skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (9)
1. The quantum dot backlight module is characterized by comprising a backlight source and a color film layer arranged on the backlight source;
the color film layer comprises blue color resistance, red color resistance and green color resistance,
the blue color resistance, the red color resistance and the green color resistance form corresponding color points in a horseshoe-shaped color gamut diagram,
the red color point comprises a first color coordinate located in a first direction and a second color coordinate located in a second direction;
the green color point comprises a third color coordinate in a first direction and a fourth color coordinate in a second direction;
the blue color point comprises a fifth color coordinate in a first direction and a sixth color coordinate in a second direction;
wherein,
in the first direction, the first color coordinate is greater than the third color coordinate and greater than the fifth color coordinate;
in the second direction, the fourth color coordinate is greater than the second color coordinate and greater than the sixth color coordinate,
the horseshoe-shaped color gamut diagram comprises an isoelectric white point, the color point of each color and the connecting line of the isoelectric white point extend reversely and form an intersection point with the boundary line of the horseshoe-shaped color gamut diagram, the connecting line of the intersection point and the isoelectric white point is the color point wavelength of the color,
the wavelength at the peak position of each color of the backlight module and the color point wavelength of the corresponding color meet a first corresponding relation,
the first corresponding relation is as follows:
(λ color point of color film +λ Backlight wave crest )/2＝λ Color gamut standard color point ±10nm，
Wherein lambda is Color point of color film For the color point wavelength lambda Backlight wave crest Is the peak wavelength lambda of the backlight module Color gamut standard color point Is the color point wavelength of the corresponding color in the standard color gamut.
2. The backlight module according to claim 1, wherein the preset color temperature value and the tristimulus value of the backlight module satisfy a second correspondence relationship,
the second corresponding relation is as follows:
Wx＝WX/(WX+WY+WZ)，Wy＝WY/(WX+WY+WZ)，
wherein Wx is a first preset color temperature value, wy is a second preset color temperature value,
WX is a first stimulus value, WY is a second stimulus value, and WZ is a third stimulus value.
3. A backlight module according to claim 1, wherein,
the color point wavelength of the red color point is 625 + 50nm,
the color point wavelength of the green color point is 540+/-50 nm
The color point wavelength of the blue color point is 455+ -50 nm.
4. A backlight module according to claim 3, wherein,
the first color coordinate is 0.639 plus or minus 0.1, and the second color coordinate is 0.352 plus or minus 0.1;
the third color coordinate is 0.313+/-0.1, and the fourth color coordinate is 0.606+/-0.1;
the fifth color coordinate is 0.140+/-0.06, and the fifth color coordinate is 0.091+/-0.1.
5. A backlight module according to claim 3, wherein,
the first color coordinate is 0.639, and the second color coordinate is 0.352, the red color point of the backlight module is (0.679,0.313),
the third color coordinate is 0.313, and when the fourth color coordinate is 0.606, the green color point of the backlight module is G (0.255,0.706),
the fifth color coordinate is 0.140, and when the fifth color coordinate is 0.091, the blue color point of the backlight module is B (0.150,0.053),
the peak length of the blue light of the backlight module is 452nm, the peak length of the green light of the backlight module is 538nm, and the peak length of the red light of the backlight module is 626nm.
6. A backlight module according to any one of claims 1 to 5,
the red color resistance is a pigment material or a dye material,
the green color resist is pigment material or dye material, and
the blue resistor is a dye material.
7. A method for manufacturing a quantum dot backlight module is characterized in that,
forming a backlight
Forming a color film layer on the backlight source, wherein the color film layer comprises a blue color resistor, a red color resistor and a green color resistor;
the blue color resistor, the red color resistor and the green color resistor form corresponding color points in the horseshoe-shaped color gamut diagram, and the red color points comprise first color coordinates in a first direction and second color coordinates in a second direction;
the green color point comprises a third color coordinate in a first direction and a fourth color coordinate in a second direction;
the blue color point comprises a fifth color coordinate in a first direction and a sixth color coordinate in a second direction;
forming a color film layer on the backlight further comprises:
in the first direction, such that the first color coordinate is greater than the third color coordinate and greater than the fifth color coordinate;
in the second direction, such that the fourth color coordinate is greater than the second color coordinate and greater than the sixth color coordinate,
the horseshoe-shaped color gamut diagram comprises an isoelectric white point, the color point of each color and the connecting line of the isoelectric white point extend reversely and form an intersection point with the boundary line of the horseshoe-shaped color gamut diagram, the connecting line of the intersection point and the isoelectric white point is the color point wavelength of the color,
the wavelength at the peak position of each color of the backlight module and the color point wavelength of the corresponding color meet a first corresponding relation,
the first corresponding relation is as follows:
(λ color point of color film +λ Backlight wave crest )/2＝λ Color gamut standard color point ±10nm，
Wherein lambda is Color point of color film For the color point wavelength lambda Backlight wave crest Is the peak wavelength lambda of the backlight module Color gamut standard color point Is the color point wavelength of the corresponding color in the standard color gamut.
8. The method of claim 7, wherein the method further comprises:
determining a color point wavelength and a peak wavelength corresponding to the color point according to the color point of each color;
determining the intensity of different colors according to the second corresponding relation between the preset color temperature value and the stimulus value;
and obtaining the intensity ratio of the backlight module according to the intensities of the different colors.
9. A quantum dot display device, characterized in that the display device comprises a backlight module according to any one of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211011588.1A CN115561931B (en) | 2022-08-23 | 2022-08-23 | Quantum dot backlight module, backlight device and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211011588.1A CN115561931B (en) | 2022-08-23 | 2022-08-23 | Quantum dot backlight module, backlight device and manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115561931A CN115561931A (en) | 2023-01-03 |
| CN115561931B true CN115561931B (en) | 2024-04-09 |
Family
ID=84740065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211011588.1A Active CN115561931B (en) | 2022-08-23 | 2022-08-23 | Quantum dot backlight module, backlight device and manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115561931B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09189910A (en) * | 1996-10-28 | 1997-07-22 | Seiko Epson Corp | Color display device |
| JP2001228322A (en) * | 1999-12-09 | 2001-08-24 | Toray Ind Inc | Color filter and liquid crystal display device |
| CN101169559A (en) * | 2007-12-10 | 2008-04-30 | 友达光电股份有限公司 | Liquid crystal display |
| CN101256311A (en) * | 2008-04-14 | 2008-09-03 | 友达光电股份有限公司 | Lcd |
| CN101984373A (en) * | 2010-09-28 | 2011-03-09 | 友达光电股份有限公司 | Liquid crystal display (LCD) device |
| KR20110058195A (en) * | 2009-11-26 | 2011-06-01 | 엘지디스플레이 주식회사 | Liquid crystal display device |
| WO2013169642A1 (en) * | 2012-05-06 | 2013-11-14 | Lighting Science Group Corporation | Tunable light system having an adaptable light source and associated methods |
| CN103487991A (en) * | 2013-06-28 | 2014-01-01 | 友达光电股份有限公司 | Display device |
| CN107505774A (en) * | 2017-09-28 | 2017-12-22 | 京东方科技集团股份有限公司 | The adjusting method of backlight module and its luminescent spectrum, liquid crystal display device |
| CN207517695U (en) * | 2017-12-14 | 2018-06-19 | 上海和辉光电有限公司 | A kind of display device |
| WO2019078288A1 (en) * | 2017-10-19 | 2019-04-25 | 大日本印刷株式会社 | Color calibration viewer, and color calibration set in which same is used |
| CN215219221U (en) * | 2021-05-25 | 2021-12-17 | 中国计量大学 | Broadband transmission type three-primary-color filter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI334047B (en) * | 2007-11-22 | 2010-12-01 | Au Optronics Corp | Liquid crystal display |
-
2022
- 2022-08-23 CN CN202211011588.1A patent/CN115561931B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09189910A (en) * | 1996-10-28 | 1997-07-22 | Seiko Epson Corp | Color display device |
| JP2001228322A (en) * | 1999-12-09 | 2001-08-24 | Toray Ind Inc | Color filter and liquid crystal display device |
| CN101169559A (en) * | 2007-12-10 | 2008-04-30 | 友达光电股份有限公司 | Liquid crystal display |
| CN101256311A (en) * | 2008-04-14 | 2008-09-03 | 友达光电股份有限公司 | Lcd |
| KR20110058195A (en) * | 2009-11-26 | 2011-06-01 | 엘지디스플레이 주식회사 | Liquid crystal display device |
| CN101984373A (en) * | 2010-09-28 | 2011-03-09 | 友达光电股份有限公司 | Liquid crystal display (LCD) device |
| WO2013169642A1 (en) * | 2012-05-06 | 2013-11-14 | Lighting Science Group Corporation | Tunable light system having an adaptable light source and associated methods |
| CN103487991A (en) * | 2013-06-28 | 2014-01-01 | 友达光电股份有限公司 | Display device |
| CN107505774A (en) * | 2017-09-28 | 2017-12-22 | 京东方科技集团股份有限公司 | The adjusting method of backlight module and its luminescent spectrum, liquid crystal display device |
| WO2019078288A1 (en) * | 2017-10-19 | 2019-04-25 | 大日本印刷株式会社 | Color calibration viewer, and color calibration set in which same is used |
| CN207517695U (en) * | 2017-12-14 | 2018-06-19 | 上海和辉光电有限公司 | A kind of display device |
| CN215219221U (en) * | 2021-05-25 | 2021-12-17 | 中国计量大学 | Broadband transmission type three-primary-color filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115561931A (en) | 2023-01-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7339642B2 (en) | Liquid crystal display device having sub pixels with transmissive regions extending entirely across the sub pixel | |
| US7834966B2 (en) | Liquid crystal display device and display equipment using the same | |
| US7916245B2 (en) | Display device | |
| JP4583650B2 (en) | Color liquid crystal panel, manufacturing method thereof, and color liquid crystal display device | |
| US8035778B2 (en) | Display panel, electro-optical apparatus and fabricating methods thereof | |
| US11187937B2 (en) | Color filter, fabrication method thereof, display panel and display device | |
| US20050253795A1 (en) | Display device and electronic apparatus | |
| CN114068843A (en) | Display panel and display device | |
| KR20150020504A (en) | Display device and electronic device | |
| CN106773260A (en) | Display panel, display device, color membrane substrates and array base palte | |
| CN115561931B (en) | Quantum dot backlight module, backlight device and manufacturing method | |
| CN111668274A (en) | Display panel, display device and preparation method | |
| TW201322215A (en) | Color filter substrate and liquid display panel using the same | |
| CN114721184B (en) | Display device | |
| KR100970259B1 (en) | Liquid Crystal Display Assembly | |
| TWI691765B (en) | Display apparatus | |
| CN114744012B (en) | Display panel and display device | |
| JP4578802B2 (en) | COLOR FILTER, COLOR FILTER MANUFACTURING METHOD, AND DISPLAY DEVICE | |
| US11892667B2 (en) | Display panel, display device, and method of manufacturing display panel | |
| US20090251640A1 (en) | Liquid crystal display | |
| TWI839694B (en) | Display device | |
| TWI694618B (en) | Quantum dot film assembly and manufacturing method thereof | |
| WO2023141961A1 (en) | Display device for eye care | |
| TW202321741A (en) | Display device | |
| CN114678409A (en) | Display panel and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |