CN107966848B - Display device and method for manufacturing the same - Google Patents

Display device and method for manufacturing the same Download PDF

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CN107966848B
CN107966848B CN201711395664.2A CN201711395664A CN107966848B CN 107966848 B CN107966848 B CN 107966848B CN 201711395664 A CN201711395664 A CN 201711395664A CN 107966848 B CN107966848 B CN 107966848B
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light
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CN107966848A (en
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黄士展
叶政玮
刘桂伶
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Innolux Corp
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • 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

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  • Nonlinear Science (AREA)
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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electroluminescent Light Sources (AREA)
  • Optical Filters (AREA)

Abstract

The invention provides a display device and a method of manufacturing the same. The display device comprises a display panel, the ratio of green energy to blue energy of light emitted by the display panel at the highest gray scale is between 0.7 and 1.2, and on a CIE1931xy chromaticity diagram corresponding to the light, the range of blue color point coordinates (x, y) is between the equation of y-168.72 x2+50.312x-3.635 and equation y-168.72 x2+63.81x-5.9174, and y is between 0.04 and 0.08.

Description

Display device and method for manufacturing the same
The present application is a divisional application of the chinese invention patent application, which was filed on 7/9/2012, with the application number of 201210328419.0 and entitled "display device and method for manufacturing the same".
Technical Field
The present invention relates to a display device, and more particularly, to a display device and a method for manufacturing the same.
Background
Since the display device has excellent characteristics of being thin and light, low power consumption, and low radiation, it has gradually replaced the conventional Cathode Ray Tube (CRT) display device and is applied to various electronic products.
Color quality is an important design factor in the design of display devices, and it can be embodied by a chromaticity diagram, for example, for a display panel, the emitted light corresponds to a CIE1931 chromaticity diagram, and in the chromaticity diagram, the three primary colors (blue, green and red) all have their corresponding color points, i.e., the three vertices of the chromaticity triangle. The currently popular chromaticity specification is sRGB, which has coordinates of (0.15,0.06) for the blue color point, (0.3,0.6) for the green color point, and (0.64,0.33) for the red color point in the CIE1931 chromaticity diagram. If the color dots of the three primary colors deviate too much from the color dot coordinates of the sRGB standard, the image colors representing the display panel may be distorted, which results in poor image display and thus poor viewing quality.
Therefore, how to provide a display device, the chromaticity diagram corresponding to the emitted light can maintain the three primary color points within a better range all the time, so as to improve the display quality and the product competitiveness, which is one of the important issues at present.
Disclosure of Invention
In view of the foregoing, it is an object of the present invention to provide a display device and a method for manufacturing the same, in which the chromaticity diagram corresponding to the emitted light can maintain the color points of the three primary colors within a preferred ratio and range, thereby improving the quality of the display screen.
To achieve the above object, a display device according to the present invention includes a display panel, wherein a ratio of a green energy of a color light obtained under a condition of a highest gray scale (255 gray scale in 8-bit gray scale) to a blue energy obtained at the highest gray scale of light emitted from the display panel is between 0.7 and 1.2, and a coordinate (x, y) of a blue color point on a CIE1931xy chromaticity diagram corresponding to the light falls within a range of an equation of y-168.72 x2+50.312x-3.635 and equation y-168.72 x2+63.81x-5.9174, and y is between 0.04 and 0.08.
In one embodiment, the green color point coordinates (x, y) range between-48.85 x and the equation y2+22.964x-2.0014 and equation y-48.85 x2+26.872x-2.9981, and y is between 0.58 and 0.64.
In one embodiment, the green color point coordinates (x, y) range between-48.85 x and the equation y2+22.964x-2.0014 and equation y-48.85 x2+26.872x-2.9981, and y is between 0.64 and 0.7.
In one embodiment, the ratio of the green energy to the blue energy is between 0.8 and 1.1 under the condition of the highest gray level.
In one embodiment, the ratio of the red energy to the blue energy of the light is between 0.49 and 0.75 at the highest gray level.
In one embodiment, the ratio of the red energy to the blue energy is between 0.5 and 0.7 for the highest gray level.
In one embodiment, the coordinates (x, y) of the red color point range between the equation y-2.021 x2+2.1871x-0.2218 and equation y-2.021 x2+2.1871x-0.2618, and x is between 0.62 and 0.66.
In one embodiment, the coordinates (x, y) of the red color point range between the equation y-2.021 x2+2.1871x-0.2218 and equation y-2.021 x2+2.1871x-0.2618, and x is between 0.66 and 0.68.
In one embodiment, the display panel is a liquid crystal display panel, a quantum dot display panel or an organic light emitting diode display panel.
In one embodiment, the oled display panel includes a substrate and a light emitting layer disposed on the substrate and having a plurality of red light emitting regions, a plurality of green light emitting regions, and a plurality of blue light emitting regions.
In one embodiment, the oled display panel includes a substrate, a light emitting layer disposed on the substrate and emitting white light, and a filter layer disposed on the light emitting layer and having a plurality of red filter regions, a plurality of green filter regions, and a plurality of blue filter regions.
In one embodiment, the green energy corresponds to an integrated area of a green spectrum of the light and the blue energy corresponds to an integrated area of a blue spectrum of the light.
In one embodiment, the red energy corresponds to an integral area of a red spectrum of the light.
To achieve the above object, a method for manufacturing a display device according to the present invention includes: forming a display panel; and making the ratio of a green energy to a blue energy of the light emitted by the display panel at the highest gray level between 0.7 and 1.2, and making the range of the blue color point coordinate (x, y) on the CIE1931xy chromaticity diagram corresponding to the light be-168.72 x2+50.312x-3.635 and equation y-168.72 x2+63.81x-5.9174, and y is between 0.04 and 0.08.
In view of the above, in the display device and the method for manufacturing the same according to the present invention,the ratio of a green energy to a blue energy of the light emitted by the display panel under the condition of the highest gray scale is limited to 0.7 and 1.2, so that the coordinate (x, y) of the blue color point on the CIE1931xy chromaticity diagram corresponding to the light is in the range of-168.72 x2+50.312x-3.635 and equation y-168.72 x2+63.81x-5.9174, and y is between 0.04 and 0.08. The color point ranges are preferred ranges, which improves the display quality of the display device of the present invention.
Drawings
FIG. 1 is a diagram illustrating an intensity spectrum of light emitted from a display panel according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of a CIE1931xy chromaticity diagram corresponding to light emitted by the display panel according to the preferred embodiment of the invention;
FIG. 3 is a schematic diagram of a liquid crystal display panel according to a preferred embodiment of the present invention;
FIG. 4 is a diagram of a quantum dot display panel according to a preferred embodiment of the present invention;
FIG. 5 is a schematic diagram of an OLED display panel according to a preferred embodiment of the present invention; and
fig. 6 is a flowchart illustrating a method for manufacturing a display device according to a preferred embodiment of the invention.
Reference numerals:
1.2, 3: display panel
11: first substrate
12: second substrate
121: color filter layer
13: liquid crystal layer
21. 31: substrate
22: quantum dot light emitting layer
32: luminescent layer
33: filter layer
331: red filter area
332: green light filtering area
333: blue filter region
B: blue zone
G: green zone
R: red color zone
S01, S02: steps of the manufacturing method
Detailed Description
A display device and a method of manufacturing the same according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings, in which like elements are described with like reference numerals.
The present invention does not limit the kind of the display device, and it may be, for example, a liquid crystal display device, a quantum dot display device, or an organic light emitting diode display device.
In a preferred embodiment of the present invention, the display device includes a display panel, such as a liquid crystal display panel, a quantum dot display panel or an organic light emitting diode display panel. The ratio of a green energy to a blue energy (green energy to blue energy ratio) of the color light energy of the light emitted by the display panel under the condition of the highest gray scale (255 gray scales in the case of 8-bit color scale) is between 0.7 and 1.2. FIG. 1 is a diagram of an intensity spectrum (with y-axis intensity in arbitrary units) of light emitted by a display panel, wherein the intensity spectrum includes a green spectrum, a blue spectrum, and a red spectrum. The green spectrum refers to the spectrum obtained when the display panel only displays the picture with the highest gray level of green (for example, 255 gray levels). The red spectrum refers to a spectrum obtained when the display panel displays only a picture with the highest gray level of red (e.g., 255 gray levels). The blue spectrum refers to a spectrum obtained when the display panel displays only a frame with the highest gray level of blue (e.g., 255 gray levels). Here, the green energy is an integrated area corresponding to the green spectrum (i.e., the area under the curve of the green spectrum), and the blue energy is an integrated area corresponding to the blue spectrum (i.e., the area under the curve of the blue spectrum). In addition, when the design requirement is closer to the sRGB specification, it is preferable that the ratio of the green energy to the blue energy (green energy to blue energy ratio) is designed to be between 0.8 and 1.1, so that the positions of the blue and green color points on the CIE coordinates are closer to the position specified by the sRGB specification.
Fig. 2 is a CIE1931xy chromaticity diagram corresponding to the light emitted by the display panel of the present embodiment. On the chromaticity diagram, when the color light energy measured under the condition of the highest gray scale (for example, 255 gray scales) of the light emitted by the display panel meets the above ratio range, the range of the blue color point coordinate (x, y) of the light emitted by the display panel on the chromaticity diagram is between-168.72 x and the equation y2+50.312x-3.635 (equation a) and-168.72 x2+63.81x-5.9174 (equation B), and y is between 0.04 and 0.08, thereby improving the display quality and maintaining the color and taste of the display panel.
In addition, when the color light energy of the light emitted by the display panel under the condition of the highest gray scale (for example, 255 gray scales) meets the above ratio range, the range of the green color point coordinate (x, y) of the light emitted by the display panel on the chromaticity diagram is between-48.85 x and-48.85 x2+22.964x-2.0014 (equation C) and-48.85 x2+26.872x-2.9981 (equation D), and wherein y is between 0.58 and 0.64. In addition, the color saturation of the color range of the color light can be designed to be higher and the single color can be more vivid, i.e. when the NTSC is greater than or equal to 80% of the high color gamut, the y-coordinate range of the green color point is preferably between 0.64 and 0.7.
Referring to fig. 1, the ratio of red energy to blue energy (ratio of red energy to blue energy) of the color light energy measured under the condition of the highest gray scale (e.g. 255 gray scales) of the light emitted by the display panel can be designed to be between 0.49 and 0.75. Here, the red energy corresponds to an integrated area of the red spectrum (i.e., an area under the curve of the red spectrum) shown in fig. 1. In addition, when the design requirement is closer to the sRGB specification, it is preferable that the ratio of the red energy to the blue energy (red energy to blue energy ratio) is designed to be between 0.5 and 0.7, so that the positions of the blue and red color points on the CIE coordinates are closer to the position specified by the sRGB.
Based on the above design, please refer to fig. 2, the color light energy measured under the condition of the highest gray scale (e.g. 255 gray scale) of the light emitted by the display panel is in accordance withIn the above ratio range, the coordinate range (x, y) of the red color point of the light emitted by the display panel on the chromaticity diagram is between-2.021 x2+2.1871x-0.2218 (equation E) and-2.021 x2+2.1871x-0.2618 (equation F), and wherein x is between 0.62 and 0.66. Thereby improving the display quality and color and taste. In addition, in high color gamut applications with NTSC greater than or equal to 80%, the x-coordinate range of the red color point may preferably be between 0.66 and 0.68. The design conditions of the ratio of the green energy to the blue energy and the ratio of the red energy to the blue energy can be respectively or simultaneously satisfied.
In the present invention, the display panel can have various variations, and some embodiments of the display panel are illustrated below.
Fig. 3 is a schematic diagram of a display panel 1 according to a preferred embodiment of the invention, which is a liquid crystal display panel. The display panel 1 includes a first substrate 11, a second substrate 12 and a liquid crystal layer 13. The first substrate 11 is, for example, a thin film transistor substrate, the second substrate 12 is, for example, a color filter substrate, and the liquid crystal layer 13 is disposed between the first substrate 11 and the second substrate 12. The first substrate 11 and the second substrate 12 may be glass substrates, transparent acrylic substrates, flexible substrates, or Touch (Touch) substrates. In this aspect, the second substrate 12 includes a color filter layer 121, which includes a blue filter portion, a green filter portion and a red filter portion. When the light emitted by the backlight module of the liquid crystal display device penetrates through the blue filter part, the blue energy of the light of the display panel 1 can be formed and can be represented by the blue spectrum of the light; when the light emitted by the backlight module of the liquid crystal display device passes through the green light filtering part, the green energy of the light of the display panel 1 can be formed and can be represented by the green light spectrum of the light; when the light emitted from the backlight module of the liquid crystal display device passes through the red filter portion, the red energy of the light of the display panel 1 can be formed and can be represented by the red spectrum of the light.
The calculation method of the energy of the blue, green and red light of the display panel is as follows:
energy of blue light
Figure BDA0001518413740000051
Green light energy
Figure BDA0001518413740000061
Red light energy
Figure BDA0001518413740000062
Wherein BLU (λ) represents an energy distribution spectrum of the backlight source; BCF (lambda) represents a transmission spectrum of the blue filter, GCF (lambda) represents a transmission spectrum of the green filter, and RCF (lambda) represents a transmission spectrum of the red filter; CELL (lambda) represents the liquid crystal transmission spectrum of the display panel after deducting the color filter layer (CF), lambda is the wavelength, 380 and 780 refer to the wavelength range for calculating the integral, and the energy unit of the blue light, the green light and the red light obtained by the integral is the light tile. As can be seen from the above, the energy variation of each color can be adjusted by individually designing and changing the backlight unit BLU (λ), the light-filtering part CF (λ) of each color, or the liquid crystal transmission spectrum CELL (λ), or the difference of the mutual matching.
Since the energy can be adjusted by designing the transmission spectrum of the filter portion CF (λ), the energy variation can be adjusted by adjusting the material types (e.g. R254, R177, G7, G36, G58, Y150, Y138, Y139, B15:6, etc.) and the weight percentages thereof of the filter portion, for example, the peak value of the transmission spectrum of the blue filter layer is designed to be between 440nm and 470nm, the peak value of the transmission spectrum of the green filter layer is designed to be between 500nm and 550nm, and the ratio of the green energy to the blue energy of the display panel at the highest gray scale is adjusted to be between 0.7 and 1.2, so that the coordinate (x, Y) range of the blue color point on the CIE1931xy chromaticity diagram is between the equation Y-168.72 x2+50.312x-3.635 (equation a) and-168.72 x2+63.81x-5.9174 (equation B), and wherein y is between 0.04 and 0.08; also, the coordinates (x, y) of the green color point are in the range between the equation y-48.85 x2+22.964x-2.0014 (equation C) and-48.85 x2+26.872x-2.9981 (equation D), and wherein y is between 0.58 and 0.64.
When the design requirement is closer to the sRGB specification, the ratio of the green light energy to the blue light energy is preferably between 0.8 and 1.1. It is also possible to design the color gamut of the color light with higher color saturation and more vivid single color, i.e. the NTSC is greater than or equal to 80% of the high color gamut, so as to meet the ratio range of green light energy to blue light energy, and the y-coordinate range of the green color point is preferably between 0.64 and 0.7.
The ratio of red energy to blue energy can be similarly adjusted to be between 0.49 and 0.75, so that the coordinates (x, y) of the red color point range from-2.021 x2+2.1871x-0.2218 (equation E) and-2.021 x2+2.1871x-0.2618 (equation F), and wherein x is between 0.62 and 0.66. When the design requirement is closer to the sRGB specification, it is preferable to adjust the ratio of the red energy to the blue energy to be between 0.5 and 0.7. In high gamut applications, the x-coordinate range of the red color point may preferably be between 0.66 and 0.68.
The energy ratio can also be adjusted by designing the backlight unit BLU (λ). For example, when the backlight source is a blue LED matched with red and green phosphors, the backlight source has a spectrum, and by changing the material type or weight percentage of the phosphors, or changing the current input to the backlight source, the peak value of the blue light is designed to be approximately between 440nm and 470nm, the peak value of the emission spectrum of the green phosphor is designed to be approximately between 500nm and 550nm, and the peak value of the emission spectrum of the red phosphor is designed to be approximately between 600nm and 660 nm; or, for example, when the backlight source is a blue LED combined with a yellow phosphor, the ratio of the red light energy and the blue light energy at the highest gray level of each color can be adjusted by changing the material type or the weight percentage of the phosphor, or changing the current input to the backlight source, wherein the peak value of the blue light waveform is approximately between 440nm and 470nm, and the peak value of the emission spectrum of the yellow phosphor is approximately between 550nm and 570nm, so that the chromaticity coordinate is within the above-mentioned design range. The adjustment of the ratio of the green light energy to the blue light energy is also performed, and is not described herein.
In addition, the liquid crystal transmission spectrum CELL (λ) of the pixels with different colors can be designed or the above conditions can be matched with each other to adjust the energy ratio so as to conform to the above design range, which is not described herein again.
The display panel 1 of the present invention can also be changed in different ways by applying other technologies, such as disposing a color filter on array (COA) on one side of the TFT array, or disposing the TFT array on a color filter substrate (TFT on CF, also called TOC or array on CF). The first substrate 11 and the second substrate 12 may be transparent acrylic substrates or flexible substrates. The blue energy and the green energy or the blue energy and the red energy can be designed according to the above conditions, so that the color point is within a certain range on the CIE1931 chromaticity coordinate, which is not described herein again.
Fig. 5 is a schematic diagram of a display panel 3 of an Organic Light Emitting Diode (OLED) display panel according to a preferred embodiment of the invention. The display panel 3 includes a substrate 31, a light emitting layer 32 and a filter layer 33, wherein the light emitting layer 32 emits white light, and the filter layer 33 has a plurality of red filter regions 331, a plurality of green filter regions 332 and a plurality of blue filter regions 333. The substrate 31 and the opposite substrate (not shown) may be a glass substrate, a transparent acrylic substrate, a flexible substrate, a touch substrate, or a protective film. In this aspect, when the white light of the light emitting layer 32 passes through the red filter region 331, the red energy of the light of the display panel 3 can be formed, which can be represented by the red spectrum of the light; when the white light of the light emitting layer 32 passes through the green filter region 332, green energy of the light of the display panel 3 can be formed, which can be represented by a green spectrum of the light; when the white light of the light emitting layer 32 penetrates the blue filter region 333, the blue energy of the light of the display panel 3 can be formed, which can be represented by the blue spectrum of the light. The red spectrum refers to a spectrum obtained when the display panel only displays a picture with the highest gray level of red (for example, 255 gray levels). The green spectrum is the spectrum obtained when the display panel 3 displays only the picture with the highest gray level of green (for example, 255 gray levels). The blue spectrum refers to a spectrum obtained when the display panel displays only a frame with the highest gray level of blue (e.g., 255 gray levels).
In this embodiment, the energy of each color can be changed byThe design of the filter layer or the design of the light emitting layer or the matching thereof is used to adjust the ratio of the green energy to the blue energy or the red energy to the blue energy to be within the above design range. For example, the material types (e.g., R254, R177, G7, G36, G58, Y150, Y138, Y139, B15:6, etc.) or the weight percentages thereof of the filter layer may be designed, the peak value of the transmission spectrum of the blue filter layer is between 440nm and 470nm, the peak value of the transmission spectrum of the green filter layer is between 500nm and 550nm, and the highest gray scale of each color of the display panel is adjusted such that the ratio of the green energy to the blue energy is between 0.7 and 1.2, such that the coordinate (x, Y) of the blue color point on the CIE1931xy chromaticity diagram is in the range of-168.72 x2+50.312x-3.635 (equation a) and-168.72 x2+63.81x-5.9174 (equation B), and wherein y is between 0.04 and 0.08; and the coordinates (x, y) of the green color point range between the equation y-48.85 x2+22.964x-2.0014 (equation C) and-48.85 x2+26.872x-2.9981 (equation D), and wherein y is between 0.58 and 0.64. The ratio of green light energy to blue light energy is preferably between 0.8 and 1.1. It is also possible to design the color gamut of the color light with higher color saturation and more vivid single color, i.e. NTSC greater than or equal to 80% of the high color gamut, so as to meet the above-mentioned green light energy to blue light energy ratio range, and the y range of the green color point is preferably between 0.64 and 0.7.
Or for example, the material or weight percentage of the light-emitting layer can be designed, or the current input into the light-emitting layer can be adjusted to change the intensity spectrum of the light-emitting layer between 440nm and 470nm at the peak of the blue light part, 500nm to 550nm at the peak of the green light part, 600nm to 660nm at the peak of the red light part, and the ratio of the red energy to the blue energy is adjusted to be between 0.49 and 0.75, so that the coordinate (x, y) of the red color point is in the range of the equation y-2.021 x2+2.1871x-0.2218 (equation E) and-2.021 x2+2.1871x-0.2618 (equation F), and wherein x is between 0.62 and 0.66. The blue color point is within the above-mentioned design range, where it is no longer necessaryThe description is given. When the design requirement is closer to the sRGB specification, it is preferable that the ratio of the red energy to the blue energy is between 0.5 and 0.7. In high gamut applications, the x-range of the red color point may preferably be between 0.66 and 0.68.
In an embodiment (not shown) of an Organic Light Emitting Diode (OLED) display panel emitting blue, green, and red light, the material or weight percentage of each of the light emitting layers of the respective colors or the current variation of the input light emitting layer may be designed to be changed, so that the light emitting intensity spectrum of the light emitting layer may have a peak value in a blue portion between 440nm and 470nm, a peak value in a green portion between 500nm and 550nm, and a peak value in a red portion between 600nm and 660nm, and the ratio of green energy to blue energy or red energy to blue energy may be adjusted to design the coordinates of the color points on the chromaticity diagram according to the above conditions, which will not be described herein again.
Fig. 4 is a schematic diagram of a Quantum Dot display panel 2 according to a preferred embodiment of the invention. The display panel 2 includes a substrate 21 and a quantum dot light-emitting layer 22, the quantum dot light-emitting layer 22 has a plurality of red areas R, a plurality of green areas G and a plurality of blue areas B, and the color areas are arranged at intervals. The display panel further has a pair of side substrates (not shown), and the substrate 21 and the side substrate can be a glass substrate, a transparent acrylic substrate, a flexible substrate, a touch substrate, or a protective film. In this aspect, the light emitted from the red region R can form the red energy of the light of the display panel 2 and can be represented by the red spectrum of the light; the light emitted from the green region G can form the green energy of the light of the display panel 2 and can be represented by the green spectrum of the light; the light emitted from the blue region B forms the blue energy of the light of the display panel 2 and can be represented by the blue spectrum of the light. The red spectrum refers to a spectrum obtained when the display panel only displays a picture with the highest gray level of red (for example, 255 gray levels). The green spectrum is the spectrum obtained when the display panel 2 only displays the picture with the highest gray level of green (for example, 255 gray levels). The blue spectrum refers to a spectrum obtained when the display panel displays only a frame with the highest gray level of blue (e.g., 255 gray levels).
The material type or weight percentage of the quantum dot light emitting layer with respective color can be designed, or the current input into the quantum dot light emitting layer is changed, so that the intensity spectrum of the quantum dot light emitting layer is between 440nm to 470nm at the peak value of the blue light part, between 500nm to 550nm at the peak value of the green light part, and between 600nm to 660nm at the peak value of the red light part, and the ratio range of green energy to blue energy or red energy to blue energy is adjusted, and the color point coordinates of the color point on the chromaticity diagram can be designed according to the above conditions, which is not described herein again.
Fig. 6 is a flowchart of a method for manufacturing a display device according to a preferred embodiment of the invention, which includes: forming a display panel (step S01); and adjusting the ratio of green energy to blue energy of the light emitted by the display panel at the highest gray level to be between 0.7 and 1.2, and making the range of the blue color point coordinate (x, y) on the CIE1931xy chromaticity diagram corresponding to the light be-168.72 x2+50.312x-3.635 and equation y-168.72 x2+63.81x-5.9174, and y is between 0.04 and 0.08 (step S02). The display panel may be, for example, a liquid crystal display panel, a quantum dot display panel, or an organic light emitting diode display panel. At the highest gray level, the ratio of the green energy to the blue energy may be between 0.8 and 1.1. At the highest gray levels, the ratio of a red energy to a blue energy of the light may be between 0.49 and 0.75. At the highest gray levels, the ratio of red energy to blue energy may be between 0.5 and 0.7. Since other technical features of the manufacturing method of the display device of the present embodiment are already described in detail in the above embodiments, they are not described herein again.
In summary, in the display device and the manufacturing method thereof of the present invention, the ratio of a green energy to a blue energy or the ratio of a red energy to a blue energy of the color light energy measured under the condition of the highest gray scale of the light emitted by the display panel is designed within the design range of the color point, so that the chromaticity point on the chromaticity coordinate can approach the standard coordinate value of sRGB, which improves the display quality of the display device of the present invention.
The foregoing is by way of example only, and not limiting. Any equivalent modifications or variations without departing from the spirit and scope of the present invention should be included in the protection scope of the claims.

Claims (13)

1. A display device, characterized in that the display device comprises:
a display panel, wherein the ratio of a red energy to a blue energy of a light emitted from the highest gray level is between 0.49 and 0.75, the light corresponds to a CIE1931xy chromaticity diagram, and the coordinate range of a red color point is in the equation of-2.021 x2+2.1871x-0.2218 and equation y-2.021 x2+2.1871x-0.2618, with x between 0.62 and 0.68, and a blue color point coordinate ranging from-168.72 x2+50.312x-3.635 and equation y-168.72 x2+63.81x-5.9174, and y is between 0.04 and 0.08, the blue energy corresponds to an integrated area of a blue spectrum of the light, the blue spectrum is a spectrum obtained when the display panel displays a blue highest gray level picture, and the integrated area of the blue spectrum is an area under a curve of the blue spectrum, the red energy corresponds to an integrated area of a red spectrum of the light, the red spectrum is a spectrum obtained when the display panel displays a red highest gray level picture, and the integrated area of the red spectrum is an area under a curve of the red spectrum.
2. The display device as claimed in claim 1, wherein the light corresponds to a CIE1931xy chromaticity diagram with a green color point coordinate range between-48.85 x and y2+22.964x-2.0014 and equation y-48.85 x2+26.872x-2.9981, and y is between 0.58 and 0.64.
3. The display device as claimed in claim 1, wherein the light corresponds to a CIE1931xy chromaticity diagram with a green color point coordinate range between-48.85 x and y2+22.964x-2.0014 and equation y-48.85 x2+26.872x-2.9981, and y is between 0.64 and 0.7.
4. The display apparatus as claimed in claim 1, wherein a ratio of a green energy to the blue energy of the light is further between 0.8 and 1.1, the green energy corresponds to an integrated area of a green spectrum of the light, the green spectrum is a spectrum obtained when the display panel displays a green gray-scale frame, and the integrated area of the green spectrum is an area under a curve of the green spectrum.
5. The display device as claimed in claim 1, wherein the ratio of the red energy to the blue energy of the light is further between 0.5 and 0.7.
6. The display device according to claim 1, wherein the display panel is a liquid crystal display panel.
7. The display device of claim 1, wherein the display panel is a quantum dot display panel.
8. The display device according to claim 1, wherein the display panel is an organic light emitting diode display panel.
9. The display device as claimed in claim 8, wherein the oled display panel includes a substrate and a light emitting layer disposed on the substrate and having a plurality of red light emitting regions, a plurality of green light emitting regions, and a plurality of blue light emitting regions.
10. The display device as claimed in claim 8, wherein the oled display panel includes a substrate, a light emitting layer disposed on the substrate and emitting white light, and a filter layer disposed on the light emitting layer and having a plurality of red filter regions, a plurality of green filter regions, and a plurality of blue filter regions.
11. A display device, characterized in that the display device comprises:
a display panel, wherein the ratio of a green energy to a blue energy of a light emitted from the highest gray level is between 0.7 and 1.2, the light corresponds to a CIE1931xy chromaticity diagram, and the coordinate range of a blue color point is in the equation of-168.72 x2+50.312x-3.635 and equation y-168.72 x2+63.81x-5.9174 with y between 0.04 and 0.08, and green color point coordinate range between-48.85 x and y2+22.964x-2.0014 and equation y-48.85 x2+26.872x-2.9981, and y is between 0.58 and 0.7, the green energy corresponds to an integrated area of a green spectrum of the light, the green spectrum is a spectrum obtained when the display panel displays a green gray scale picture, and the integrated area of the green spectrum is an area under a curve of the green spectrum, the blue energy corresponds to an integrated area of a blue spectrum of the light, the blue spectrum is a spectrum obtained when the display panel displays a blue gray scale picture, and the integrated area of the blue spectrum is an area under a curve of the blue spectrum.
12. The display apparatus as claimed in claim 11, wherein the light corresponds to a CIE1931xy chromaticity diagram with a red color point coordinate range between-2.021 x and y2+2.1871x-0.2218 and equation y-2.021 x2+2.1871x-0.2618, and x is between 0.62 and 0.66.
13. A display device, characterized in that the display device comprises:
a display panel, wherein the ratio of a green energy to a blue energy of the light emitted from the highest gray scale is between 0.7 and 1.2, and the coordinate range of the color point of the time-of-life is between on the CIE1931xy chromaticity diagram corresponding to the lightIn equation y-48.85 x2+22.964x-2.0014 and equation y-48.85 x2+26.872x-2.9981 with y between 0.64 and 0.7, and a blue color point coordinate ranging from-168.72 x2+50.312x-3.635 and equation y-168.72 x2+63.81x-5.9174, and y is between 0.04 and 0.08, the green energy corresponds to an integrated area of a green spectrum of the light, the green spectrum is a spectrum obtained when the display panel displays a green gray scale picture, and the integrated area of the green spectrum is an area under a curve of the green spectrum, the blue energy corresponds to an integrated area of a blue spectrum of the light, the blue spectrum is a spectrum obtained when the display panel displays a blue gray scale picture, and the integrated area of the blue spectrum is an area under a curve of the blue spectrum.
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