Display panel and display device

Abstract

The present disclosure provides a display panel and a display device. The material composition of a red filter unit (201) of the display panel comprises a 1,5-substituted alkylamino anthraquinone red dye having a mass percentage content of 0.5-20%. The material composition of a blue filter unit (202) comprises a blue dye, the blue dye comprising at least one of a 1,4-substituted alkylamino blue dye or a hydroxy anthraquinone blue dye which has a mass percentage content of 0.5-20%. The material composition of a green filter unit (203) comprises a 1,4-substituted alkylamino anthraquinone green dye having a mass percentage content of 0.5-20%.

Description

Display panel and display device Cross-reference to related applications

[0001] This application claims priority to Chinese patent application No. 2024108718574, filed on July 1, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0003] Active-matrix organic light-emitting diode (AMOLED) is a display technology. The current mainstream development trend for AMOLED is towards lower power consumption, lower cost, and larger screen sizes.

[0004] Typically, AMOLED displays include red, blue, and green light-emitting devices. AMOLEDs use red filters to filter the light emitted by the red light-emitting devices, blue filters to filter the light emitted by the blue light-emitting devices, and green filters to filter the light emitted by the green light-emitting devices. However, current materials used to fabricate these red, blue, and green filters include polyphthalocyanine dyes, such as copper chloride phthalocyanine, zinc chloride phthalocyanine, and aluminum phthalocyanine. Red, blue, and green filters fabricated using polyphthalocyanine dyes have low light conversion efficiency. To achieve a certain light intensity, the power consumption is high, and the color gamut coverage of the final output light is also low. Summary of the Invention

[0005] By utilizing one or more embodiments of the present disclosure, the problems in the related art that the red, blue, and green filter units have low light conversion efficiency, require high power consumption to achieve a certain light intensity in the final output light, and have low color gamut coverage are solved.

[0006] In a first aspect, this disclosure provides a display panel, including:

[0007] Substrate;

[0008] A driving device layer is disposed on one side of the substrate.

[0009] The light-emitting device layer is arranged on the side of the driving device layer away from the substrate, and the light-emitting device layer comprises a plurality of red light-emitting devices, a plurality of blue light-emitting devices and a plurality of green light-emitting devices, and the plurality of red light-emitting devices, the plurality of blue light-emitting devices and the plurality of green light-emitting devices are electrically connected with the driving device layer respectively, and the driving device layer is used for driving the plurality of red light-emitting devices, the plurality of blue light-emitting devices and the plurality of green light-emitting devices to emit light respectively.

[0010] The color film layer is arranged on the side of the light-emitting device layer away from the substrate, and the color film layer comprises a red filter unit arranged corresponding to the plurality of red light-emitting devices respectively, a blue filter unit arranged corresponding to the plurality of blue light-emitting devices respectively, and a green filter unit arranged corresponding to the plurality of green light-emitting devices respectively.

[0011] The material composition of the red filter unit comprises 1,5-substituted alkyl amine anthraquinone red dye, and the mass percentage content of the 1,5-substituted alkyl amine anthraquinone red dye is 0.5% to 20%; the material composition of the blue filter unit comprises blue dye, the blue dye comprises at least one of 1,4-substituted alkyl amine blue dye or hydroxyl anthraquinone blue dye, and the mass percentage content of the blue dye is 0.5% to 20%; the green filter unit comprises 1,4-substituted alkyl amine anthraquinone green dye, and the mass percentage content of the 1,4-substituted alkyl amine anthraquinone green dye is 0.5% to 20%.

[0012] In a possible implementation, the 1,5-substituted alkyl amine anthraquinone red dye has a chemical general formula (I), wherein the chemical general formula (I) is In the chemical general formula (I), the two substituents R at the 1-substituted position and the 5-substituted position are each independently selected from one of SC6H5, NHC6H11 or NHC6H4.

[0013] In a possible implementation, the blue dye has a chemical general formula (II), wherein the chemical general formula (II) is In the chemical general formula (II), the two substituents X at the 1-substituted position and the 4-substituted position are each independently selected from one of -NHCH3, -NHCH2CH3, -NH(CH2)3CH3 or -OH.

[0014] In a possible implementation, the 1,4-substituted alkyl amine anthraquinone green dye is a monoazo anthraquinone type green dye, and the monoazo anthraquinone type green dye has a chemical general formula (III), wherein the chemical general formula (III) is In the chemical general formula (III), the substituent X at the 1-substituted position is an alkyl amine -NH3, and the substituent X at the 4-substituted position is

[0015] In a possible implementation, the 1,5-substituted alkylamine anthraquinone red dye is configured to make the range of the wavelength variation value at the peak of the spectrum of the red light transmitted through the red filter unit satisfy the condition 0 nm < λ < 10 nm, where λ is the wavelength variation value.

[0016] In a possible implementation, the blue dye is configured to make the range of the wavelength variation value at the peak of the spectrum of the blue light transmitted through the blue filter unit satisfy the condition 0 nm < λ < 5 nm, where λ is the wavelength variation value.

[0017] In a possible implementation, the 1,4-substituted alkylamine anthraquinone green dye is configured to make the range of the wavelength variation value at the peak of the spectrum of the green light transmitted satisfy the condition 0 nm < λ < 5 nm, where λ is the wavelength variation value.

[0018] In a possible implementation, the 1,5-substituted alkylamine anthraquinone red dye is configured to make the variation value of the color coordinates of the red light transmitted through the red filter unit satisfy 0 ≤ CIEx1 ≤ 0.02 and 0 ≤ CIEy1 ≤ 0.02, where CIEx1 is the variation value of the color coordinates of the red light in the X-axis direction, and CIEy1 is the variation value of the color coordinates of the red light in the Y-axis direction.

[0019] In a possible implementation, the blue dye is configured to make the variation value of the color coordinates of the blue light transmitted through the blue filter unit satisfy 0 ≤ CIEx2 ≤ 0.06 and 0 ≤ CIEy2 ≤ 0.06, where CIEx2 is the variation value of the color coordinates of the blue light in the X-axis direction, and CIEy2 is the variation value of the color coordinates of the blue light in the Y-axis direction.

[0020] In a possible implementation, the 1,4-substituted alkylamine anthraquinone green dye is configured to make the variation value of the color coordinates of the green light transmitted through the green filter unit satisfy 0 ≤ CIEx3 ≤ 0.06 and 0 ≤ CIEy3 ≤ 0.06, where CIEx3 is the variation value of the color coordinates of the green light in the X-axis direction, and CIEy3 is the variation value of the color coordinates of the green light in the Y-axis direction.

[0021] In a possible implementation, a flat layer is arranged on a side of the color film layer away from the substrate, the flat layer has a refractive index greater than that of the color film layer, and the difference between the refractive index of the flat layer and the refractive index of the color film layer is greater than 0.18.

[0022] In a second aspect, the present disclosure provides a display device including the display panel provided by the first aspect of the present disclosure.

[0023] The display panel and the display device are provided by the present disclosure. The material composition of the red filter unit of the color film layer of the display panel comprises 1, 5-substituted alkyl amine anthraquinone red dye; the blue dye of the blue filter unit comprises at least one of 1, 4-substituted alkyl amine blue dye or hydroxy anthraquinone blue dye; and the green filter unit comprises 1, 4-substituted alkyl amine anthraquinone green dye. In some embodiments, anthraquinone is an anthracene compound with carbonyl at 9, 10 positions, which belongs to fused ring compounds, and has a stable aromatic conjugated structure in the molecule, which can increase the electron-withdrawing of the dye. When the mass percentage content of the 1, 5-substituted alkyl amine anthraquinone red dye is 0.5% to 20%, the mass percentage content of the blue dye is 0.5% to 20%, and the mass percentage content of the 1, 4-substituted alkyl amine anthraquinone green dye is 0.5% to 20%, the 1, 5-substituted alkyl amine anthraquinone red dye, the blue dye and the 1, 4-substituted alkyl amine anthraquinone green dye carry enough electron-withdrawing, which can respectively narrow the spectrum of the red light passing through the red filter unit containing the 1, 5-substituted alkyl amine anthraquinone red dye, narrow the spectrum of the blue light passing through the blue filter unit containing at least one of the 1, 4-substituted alkyl amine blue dye or the hydroxy anthraquinone blue dye, and narrow the spectrum of the green light passing through the green filter unit containing the 1, 4-substituted alkyl amine anthraquinone green dye.

[0024] In this way, the wavelength difference between the wavelength corresponding to the spectral peak of the red light emitted by the red light emitting device and the wavelength corresponding to the spectral peak of the red light after passing through the red filter unit is small; the wavelength difference between the wavelength corresponding to the spectral peak of the blue light emitted by the blue light emitting device and the wavelength corresponding to the spectral peak of the blue light after passing through the blue filter unit is small; and the wavelength difference between the wavelength corresponding to the spectral peak of the green light emitted by the green light emitting device and the wavelength corresponding to the spectral peak of the green light after passing through the green filter unit is small, so that the conversion efficiency of the red filter unit, the blue filter unit and the green filter unit to light is high, thereby reducing the power consumption of the display panel; and the difference between the color coordinates of the red light emitted by the red light emitting device and the color coordinates of the red light after passing through the red filter unit is small, the difference between the color coordinates of the blue light emitted by the blue light emitting device and the color coordinates of the blue light after passing through the blue filter unit is small, and the difference between the color coordinates of the green light emitted by the green light emitting device and the color coordinates of the green light after passing through the green filter unit is small, thereby improving the color gamut coverage of the display panel, and improving the color level and smooth transition of the displayed image, and improving the display effect. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the related art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present disclosure, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0026] FIG. 1 is a cross-sectional view of a display panel according to an embodiment of the present disclosure;

[0027] FIG. 2 is a schematic diagram of a spectrum of light emitted by a light-emitting device layer driven by a driving device layer at a current density of 5 mA / cm2, and a spectrum of light transmitted through a color filter layer of a display panel according to an embodiment of the present disclosure;

[0028] FIG. 3 is a schematic diagram of a spectrum of light emitted by a light-emitting device layer driven by a driving device layer at a current density of 5 mA / cm2, and a spectrum of light transmitted through a color filter layer of a display panel according to a comparative embodiment 1;

[0029] FIG. 4 is a schematic diagram of a spectrum of light emitted by a light-emitting device layer driven by a driving device layer at a current density of 5 mA / cm2, and a spectrum of light transmitted through a color filter layer of a display panel according to a comparative embodiment 2. DETAILED DESCRIPTION

[0030] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood, however, that the description is merely exemplary and is not intended to limit the scope of the present disclosure. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid obscuring the concept of the present disclosure.

[0031] In the drawings, various structural diagrams according to embodiments of the present disclosure are shown. These drawings are not drawn to scale, in which some details are exaggerated for the purpose of clarity and some details can be omitted. The shapes of various regions, layers, and the relative size and positional relationship between them shown in the drawings are merely exemplary, and in actuality, they can be deviated due to manufacturing tolerances or technical limitations, and a person skilled in the art can additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0032] In the context of the present disclosure, when a layer / element is referred to as being located "on" another layer / element, the layer / element can be directly located on the other layer / element, or there can be an intervening layer / element therebetween. In addition, if a layer / element is located "on" another layer / element in one orientation, it can be located "under" the other layer / element when the orientation is reversed.

[0033] The technical solutions of the present disclosure and how the technical solutions of the present disclosure solve the above technical problems will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes can not be described again in some examples. The embodiments of the present disclosure will be described below with reference to the drawings.

[0034] Referring to FIG. 1, the display panel provided by the embodiments of the present disclosure includes a substrate 101, a driving device layer 102, a light-emitting device layer 103, an encapsulation layer 104, a color film layer 105, a planarization layer 106, and a protective cover plate 107, wherein,

[0035] The substrate 101 can be, but is not limited to, a flexible substrate 101, which can include a silicon substrate, a polyethylene terephthalate (PET) substrate, a polyethylene naphthalate two formic acid glycol ester (PEN) substrate, or a colorless polyimide (CPI), etc. It can be understood that the substrate 101 is used to support and protect the entire display panel.

[0036] It should be noted that the substrate 101 can be a single-layer structure or a multi-layer structure. For example, the substrate 101 can include a glass substrate, or the substrate 101 can include at least one flexible substrate and at least one buffer layer, and the flexible substrate and the buffer layer are alternately stacked, which is not limited by the embodiments of the present disclosure.

[0037] The driving device layer 102 is disposed on one side of the substrate 101. The driving device layer 102 can include a semiconductor layer, a source and drain, a gate, and an insulating layer (not shown in the drawings).

[0038] The gate electrode is located between the source / drain electrode and the semiconductor layer, the semiconductor layer is located on the side of the gate electrode facing the substrate 101, and the source / drain electrode is located on the side of the gate electrode away from the substrate 101. The insulating layer can include: a first gate isolation layer arranged between the gate electrode and the source / drain electrode and covering the gate electrode. An interlayer dielectric layer arranged between the first gate isolation layer and the source / drain electrode and covering the first gate isolation layer. A source / drain isolation layer arranged on the side of the source / drain electrode away from the substrate 101 and covering the source / drain electrode. In addition, the first gate isolation layer and the interlayer dielectric layer are both provided with a first metal wiring hole. The metal wiring of the source / drain electrode can be connected to the semiconductor layer through the first metal wiring hole provided by the gate isolation layer and the interlayer dielectric layer. In this way, the on-off of the channel of the semiconductor layer can be controlled. Exemplarily, the driving device layer 102 can be, but is not limited to, a thin film transistor (TFT). The type of thin film transistor is not limited too much in the embodiments of the present disclosure. For example, the thin film transistor can include an oxide thin film transistor (Oxide TFT), a low-temperature polysilicon thin film transistor, etc.

[0039] The light emitting device layer 103 is arranged on the side of the driving device layer 102 away from the substrate 101. The light emitting device layer 103 includes a pixel definition layer and a plurality of red light emitting devices, a plurality of blue light emitting devices, and a plurality of green light emitting devices. The pixel definition layer includes a plurality of pixel openings, each red light emitting device, each blue light emitting device, and each green light emitting device is arranged in one pixel opening. The driving device layer 102 is used to drive the plurality of red light emitting devices, the plurality of blue light emitting devices, and the plurality of green light emitting devices to emit light respectively. Exemplarily, the red light emitting device is used to emit red light with a wavelength of 628 nm to 640 nm, the green light emitting device is used to emit green light with a wavelength of 515 nm to 530 nm, and the blue light emitting device is used to emit blue light with a wavelength of 458 nm to 470 nm.

[0040] In some embodiments, each red light emitting device comprises an anode, a red light emitting functional layer, and a cathode, the anode is closer to the substrate 101 than the cathode. The anode is a reflective electrode, and the cathode is a transparent electrode. In some examples, the red light emitting device can be an OLED light emitting device, and the red light emitting functional layer can comprise a red organic light emitting material layer, and at least one of a hole injection layer, a hole transport layer, and an electron blocking layer disposed between the cathode and the red organic light emitting material layer, and at least one of an electron injection layer, an electron transport layer, and a hole blocking layer disposed between the anode and the red organic light emitting material layer, which are arranged according to actual needs, and the embodiments of the present disclosure do not limit this. In other examples, the red light emitting device can also be an LED light emitting device such as a Mini LED or a Micro LED, and can also be a Quantum Dot Light Emitting Diodes (QLED) light emitting device, and the embodiments of the present disclosure do not limit this.

[0041] For another example, the cathode can adopt a transparent conductive oxide film, and the anode can adopt a metal film layer, or a composite structure composed of a transparent conductive oxide film / metal film / transparent conductive oxide film stacked in sequence. The material of the transparent conductive oxide film can be, for example, any one of Indium tin oxide (ITO) and Indium zinc oxide (IZO), and the material of the metal film can be, for example, any one of gold (Au), silver (Ag), nickel (Ni), and platinum (Pt). For example, in some application scenarios, the cathode can adopt an ITO film, and the anode can be a silver electrode. In order to make the silver electrode have a higher emissivity, the thickness of the silver electrode layer is usually 100 nm.

[0042] In addition, the blue light emitting device and the green light emitting device are similar in structure to the red light emitting device, except that the blue light emitting device is used to emit a blue light emitting functional layer, and the green light emitting device is used to emit a green light emitting functional layer.

[0043] The encapsulation layer 104 is disposed on the side of the light emitting device layer 103 away from the substrate layer. The encapsulation layer 104 can be used to isolate air and moisture from entering the light emitting device layer 103, thereby avoiding the erosion of the light emitting device layer 103.

[0044] It should be noted that the encapsulation layer 104 can be made of inorganic materials such as nitride, oxide, oxynitride, nitrate, carbide, or any combination thereof, and the preparation process can be a chemical vapor deposition (CVD) process, such as a plasma enhanced chemical vapor deposition (PECVD) process. For example, the encapsulation layer 104 can be made of materials such as acrylic, hexamethyldisiloxane, polyacrylate, polycarbonate, polystyrene, etc., and the preparation process can be an ink jet printing (IJP) process.

[0045] The color filter layer 105 is disposed on the side of the light emitting device layer 103 away from the substrate 101, and the color filter layer 105 includes a black matrix 204, a red filter unit 201 corresponding to the red light emitting device, a blue filter unit 202 corresponding to the blue light emitting device, and a green filter unit 203 corresponding to the green light emitting device. The black matrix 204 is used to separate the red filter unit 201, the blue filter unit 202, and the green filter unit 203 to improve color contrast, and the light transmittance of the black matrix 204 is less than 5%. The black matrix 204 is formed in a positive trapezoidal structure using a positive photoresist or in an inverted trapezoidal structure using a negative photoresist.

[0046] The material composition of the red filter unit 201 includes 1,5-substituted alkyl amine anthraquinone red dye, and the mass percentage content of the 1,5-substituted alkyl amine anthraquinone red dye is 0.5% to 20%. For example, the mass percentage content of the 1,5-substituted alkyl amine anthraquinone red dye is 0.5%, 10%, or 20%, etc., which is not limited herein.

[0047] In some embodiments, the 1,5-substituted alkyl amine anthraquinone red dye has a chemical formula (I). The chemical formula (I) is In the chemical formula (I), the two substituents R at the 1-substituted position and the 5-substituted position are each independently selected from one of SC6H5, NHC6H11, or NHC6H4. For example, the substituent R at the 1-substituted position in the chemical formula (I) is SC6H5, and the substituent R at the 5-substituted position is NHC6H11. For another example, the substituent R at the 1-substituted position in the chemical formula (I) is NHC6H4, and the substituent R at the 5-substituted position is NHC6H4.

[0048] In some embodiments, the material composition of the red light filtering unit 201 of the color film layer 105 of the display panel includes 1,5-substituted alkyl amine anthraquinone red dye. The anthraquinone is an anthracene compound having a carbonyl group at 9,10 positions, and belongs to a fused ring compound. The anthraquinone has a stable aromatic conjugated structure in the molecule, and can increase the electron-withdrawing of the dye. When the mass percentage content of the 1,5-substituted alkyl amine anthraquinone red dye is 0.5% to 20%, the carried electron-withdrawing is sufficient, and the spectrum of the red light passing through the red light filtering unit 201 including the 1,5-substituted alkyl amine anthraquinone red dye can be narrowed. In this way, the wavelength corresponding to the spectral peak of the red light emitted by the red light emitting device can be close to the wavelength corresponding to the spectral peak of the red light passing through the red light filtering unit 201, and the conversion efficiency of the red light filtering unit 201 to the light is high, and thus the power consumption of the display panel can be reduced.

[0049] FIG. 2 is a schematic diagram of the spectrum of the light emitted by the light emitting device layer 103 driven by the driver layer 102 at a current density J = 5 mA / cm2, and the spectrum of the light passing through the color film layer 105 of the display panel according to an embodiment of the present disclosure. As shown in FIG. 2, the 1,5-substituted alkyl amine anthraquinone red dye is used to make the wavelength change value of the spectrum of the red light passing through the red light filtering unit 201 satisfy the condition 0 nm < λ < 10 nm, where λ is the wavelength change value. λ can be 2 nm, 5 nm, or 9 nm, etc., which is not limited herein. In FIG. 2, the spectrum of the red light emitted by the red light emitting device is A1, and the spectrum of the light passing through the red light filtering unit 201 is B1. It can be seen that the difference between the wavelength corresponding to the peak of the spectrum A1 and the wavelength corresponding to the peak of the spectrum B1 is less than 10 nm. In this way, the conversion efficiency of the red light filtering unit 201 to the light can be high, and the power consumption of the display panel can be reduced.

[0050] In addition, the red light emitted by the red light-emitting device can have a color coordinate that is close to the color coordinate of the red light after passing through the red filter unit 201, and thus the color gamut coverage of the display panel can be improved. In some embodiments, the 1,5-substituted alkyl amine anthraquinone red dye is used to make the change value of the color coordinate of the red light after passing through the red filter unit 201 satisfy 0≤CIEx1≤0.02 and 0≤CIEy1≤0.02. Here, CIEx1 is the change value of the color coordinate of the red light in the X-axis direction, and CIEy1 is the change value of the color coordinate of the red light in the Y-axis direction. For example, CIEx1 can be equal to 0, 0.01, or 0.02, and CIEy1 can be equal to 0, 0.01, or 0.02. In this way, the color gamut coverage of the display panel can be improved. In some embodiments, the 1,5-substituted alkyl amine anthraquinone red dye is used to make the change value of the color coordinate of the red light after passing through the red filter unit 201 satisfy 0≤CIEx1≤0.008 and 0≤CIEy1≤0.008. Here, CIEx1 is the change value of the color coordinate of the red light in the X-axis direction, and CIEy1 is the change value of the color coordinate of the red light in the Y-axis direction. For example, CIEx1 can be equal to 0.004 or 0.006, and CIEy1 can be equal to 0.004 or 0.006. In this way, the color gamut coverage of the display panel can be improved.

[0051] The material components of the blue filter unit 202 include a blue dye, which includes at least one of a 1,4-substituted alkyl amine blue dye or a hydroxyl anthraquinone blue dye, and the mass percentage content of the blue dye is 0.5% to 20%. For example, the mass percentage content of the 1,4-substituted alkyl amine blue dye is 0.5%, 10%, or 20%; for another example, the mass percentage content of the 1,4-substituted hydroxyl anthraquinone blue dye is 0.5%, 10%, or 20%; for another example, the mass percentage content of the 1,4-substituted alkyl amine blue dye is 5% and the mass percentage content of the 1,4-substituted hydroxyl anthraquinone blue dye is 5%.

[0052] In some embodiments, the blue dye has a chemical formula (II), where the chemical formula (II) is The two substituents X at the 1-substituted position and the 4-substituted position in the chemical general formula (II) are each independently selected from one of -NHCH3, -NHCH2CH3, -NH(CH2)3CH3, -OH. For example, the substituent at the 1-substituted position in the chemical general formula (II) is -NHCH3, and the substituent at the 4-substituted position in the chemical general formula (II) is -NHCH2CH3; for another example, the substituent at the 1-substituted position in the chemical general formula (II) is -NH(CH2)3CH3, and the substituent at the 4-substituted position in the chemical general formula (II) is -NH(CH2)3CH3.

[0053] Since the blue dye includes at least one of the 1,4-substituted alkyl amine blue dye or the hydroxyl anthraquinone blue dye, in some embodiments, the anthraquinone is an anthracene compound having a carbonyl group at the 9,10 position, belongs to a fused ring compound, and has a stable aromatic conjugated structure in the molecule, which can increase the electron-withdrawing of the dye. The spectrum of the blue light passing through the blue filter unit 202 including at least one of the 1,4-substituted alkyl amine blue dye or the hydroxyl anthraquinone blue dye is narrowed.

[0054] In this way, the wavelength corresponding to the peak of the spectrum of the blue light emitted by the blue light emitting device can be made to have a smaller wavelength difference from the wavelength corresponding to the peak of the spectrum of the blue light passing through the blue filter unit 202, so that the conversion efficiency of the blue filter unit 202 to the light is high, and the power consumption of the display panel can be reduced.

[0055] For example, the blue dye is used to make the wavelength variation value at the peak of the spectrum of the blue light passing through the blue filter unit 202 satisfy the condition 0nm<λ<5nm. Wherein, λ is the wavelength variation value. For example, λ can be equal to 1nm, 2nm, 4nm, etc., which is not limited herein. As shown in FIG. 2, the spectrum of the blue light emitted by the blue light emitting device is A3, and the spectrum passing through the blue filter unit 202 is B3. The difference between the wavelength corresponding to the peak of the spectrum A3 and the wavelength corresponding to the peak of the spectrum B3 in FIG. 2 is less than 5nm. In this way, the conversion efficiency of the blue filter unit 202 to the light can be high, and the power consumption of the display panel can be reduced.

[0056] In addition, the blue light emitted by the blue light-emitting device can have a color coordinate that is close to the color coordinate of the blue light after passing through the blue filter unit 202, and thus the color gamut coverage of the display panel can be improved. In some embodiments, the blue dye is configured to cause the color coordinate of the blue light after passing through the blue filter unit 202 to satisfy 0≤CIEx2≤0.06 and 0≤CIEy2≤0.06, where CIEx2 is the change in the color coordinate of the blue light in the X-axis direction, and CIEy2 is the change in the color coordinate of the blue light in the Y-axis direction. For example, CIEx2 can be 0, 0.03, or 0.06, and CIEy2 can be 0, 0.03, or 0.06, without being limited thereto. In this way, the color gamut coverage of the display panel can be improved.

[0057] The green filter unit 203 includes a 1,4-substituted alkyl amine anthraquinone green dye, and the mass percentage content of the 1,4-substituted alkyl amine anthraquinone green dye is 0.5% to 20%. For example, the mass percentage content of the 1,4-substituted alkyl amine anthraquinone green dye can be 0.5%, 10%, or 20%, without being limited thereto.

[0058] In some embodiments, the 1,4-substituted alkyl amine anthraquinone green dye is a monoazo anthraquinone green dye, and the monoazo anthraquinone green dye has a chemical formula (III). The chemical formula (III) is as follows: In the chemical formula (III), the substituent X at the 1-substituted position is an alkyl amine -NH3, and the substituent X at the 4-substituted position is

[0059] Because the green filter unit 203 includes the 1,4-substituted alkyl amine anthraquinone green dye, in some embodiments, anthraquinone is an anthracene compound having a carbonyl group at the 9,10 position, and belongs to a fused ring compound. The 1,4-substituted alkyl amine anthraquinone green dye has a stable aromatic conjugated structure in the molecule, which can increase the electron-withdrawing of the dye. When the mass percentage content of the 1,4-substituted alkyl amine anthraquinone green dye is 0.5% to 20%, the 1,4-substituted alkyl amine anthraquinone green dye carries enough electrons, and thus the spectrum of the green light passing through the green filter unit 203 including the 1,4-substituted alkyl amine anthraquinone green dye can be narrowed. In this way, the wavelength corresponding to the spectral peak of the green light emitted by the green light-emitting device can be close to the wavelength corresponding to the spectral peak of the green light after passing through the green filter unit 203, and thus the conversion efficiency of the green filter unit 203 for light is high, and the power consumption of the display panel can be reduced.

[0060] In some embodiments, the 1,4-substituted alkylamine anthraquinone green dye is used to make the wavelength variation value at the peak of the spectrum of the green light that transmits satisfy the condition 0nm<λ<5nm, wherein λ is the wavelength variation value. λ can be equal to 1nm, 2nm, 4nm, etc., which are not limited herein. As shown in FIG. 2, the spectrum of the green light emitted by the green light-emitting device is A2; the spectrum of the light that transmits through the green filter unit 203 is B2; in FIG. 2, the difference between the wavelength corresponding to the peak of the spectrum A2 and the wavelength corresponding to the peak of the spectrum B2 is less than 5nm. In this way, the conversion efficiency of the green filter unit 203 to the light can be further improved, and thus the power consumption of the display panel can be reduced.

[0061] In addition, the difference between the color coordinates of the green light emitted by the green light-emitting device and the color coordinates of the green light after transmitting through the green filter unit 203 can be made smaller, and thus the color gamut coverage of the display panel can be improved.

[0062] In some embodiments, the 1,4-substituted alkylamine anthraquinone green dye is used to make the variation value of the color coordinates of the green light that transmits through the green filter unit 203 satisfy 0≤CIEx3≤0.06, 0≤CIEy3≤0.06, wherein CIEx3 is the variation value of the color coordinates of the green light in the X-axis direction, and CIEy3 is the variation value of the color coordinates of the green light in the Y-axis direction. For example, CIEx3 can be 0, 0.03 or 0.06, which are not limited herein; CIEy3 can be 0, 0.03 or 0.06, which are not limited herein. In this way, the color gamut coverage of the display panel can be improved well.

[0063] It should be noted that, in addition to the 1,5-substituted alkylamine anthraquinone red dye, the composition of the red filter unit 201, in addition to the blue dye, the composition of the blue filter unit 202, and in addition to the 1,4-substituted alkylamine anthraquinone green dye, the composition of the green filter unit 203, further includes:

[0064] Photocurable resin: The photocurable resin is the skeleton of the color filter layer 105, and the photocurable resin and the alkali-soluble resin are commonly used resins for color photoresist. The photocurable resin can be, but is not limited to, polyimide resin, polyvinyl alcohol resin, epoxy resin, acrylic resin, and acrylic resin.

[0065] Photoinitiator: Also known as photosensitive initiator, refers to a substance that can absorb specific waveband of light in the ultraviolet or visible light region to generate active intermediates to initiate monomer crosslinking and curing

[0066] Monomer: A small-molecule organic compound containing a crosslinking polymerization functional group, mainly used to adjust the viscosity of the photoresist and participate in polymerization, and together with the photoinitiator to affect the curing rate.

[0067] Organic solvent: since the viscosity between the light-cured resin and the monomer in the color filter layer 105 is relatively high, and the photo initiator is generally in solid state, in order to make the color filter layer 105 be able to be uniformly coated on the substrate 101 in the process of spin coating, an organic solvent with good dissolving ability needs to be added for dilution. For example, the organic solvent can be but not limited to a solvent compounded by propylene glycol methyl ether acetate (PGMEA), diethylene glycol methyl ethyl ether (DEME), propylene glycol methyl ether (PGME), N,N-dimethylformamide (DMF), cyclohexanone, cyclopentanone, etc.

[0068] Inhibitor: since the color filter layer 105 contains benzene ring and double bond components with good planarity, aggregation is prone to occur during storage, and by adding an inhibitor, the phenomenon can be prevented, wherein the inhibitor can be but not limited to hydroquinone or p-hydroxyanisole.

[0069] In addition, the planar layer 106 is arranged on the side of the color filter layer 105 away from the substrate 101, and the refractive index of the planar layer 106 is greater than that of the color filter layer 105. For example, the refractive index of the color filter layer 105 ranges from 1.3 to 1.6, and the refractive index of the planar layer 106 ranges from 1.5 to 2.0. The difference between the refractive index of the planar layer 106 and the refractive index of the color filter layer 105 is greater than 0.18. For example, the difference between the refractive index of the planar layer 106 and the refractive index of the color filter layer 105 can be equal to 0.2, 0.3 or 0.5. For example, the refractive index of the color filter layer 105 is 1.3, and the refractive index of the planar layer 106 is 1.5; for another example, the refractive index of the color filter layer 105 is 1.5, and the refractive index of the planar layer 106 is 1.9. It can be understood that when light is incident from a denser medium to a rarer medium, the refraction angle is smaller than the incident angle, which can make the outgoing light more convergent, and can further improve the light intensity of the outgoing light.

[0070] FIG. 3 is a schematic diagram of the display panel provided by the comparative example 1 with the wavelength variation value of the peak of the spectrum of the green light transmitted being 6 nm, the spectrum of the light emitted by the light-emitting device layer 103 driven by the driving device layer 102 at a current density J = 5 mA / cm2, and the spectrum of the light transmitted through the color filter layer 105, based on the corresponding embodiment of FIG. 2, wherein the mass percentage of the 1,4-substituted alkyl amine anthraquinone green dye in the green filter unit 203 is adjusted to be out of the range of 0.5% to 20%, or the 1,4-substituted alkyl amine anthraquinone green dye is replaced by other dyes. In FIG. 3, the spectrum of the green light emitted by the green light-emitting device is A2; the spectrum of the light transmitted through the green filter unit 203 is C2; the difference between the wavelength corresponding to the peak of the spectrum A2 and the wavelength corresponding to the peak of the spectrum C2 is 6 nm (greater than 5 nm).

[0071] Figure 4 is a schematic diagram of the spectrum of the light emitted by the light emitting device layer 103 driven by the driver device layer 102 at a current density J = 5 mA / cm2, and the spectrum of the light transmitted through the color filter layer 105, for the display panel of Comparative Example 2, which is based on the corresponding embodiment of Figure 2, except that the mass percentage of the 1,4-substituted alkyl amine anthraquinone green dye in the green filter unit 203 is further adjusted to be outside the range of 0.5% to 20%, or the 1,4-substituted alkyl amine anthraquinone green dye is replaced by another dye. In Figure 4, the spectrum of the green light emitted by the green light emitting device is A2; the spectrum of the light transmitted through the green filter unit 203 is D2; the difference between the wavelength corresponding to the peak of the spectrum A2 and the wavelength corresponding to the peak of the spectrum D2 is 11 nm (greater than 5 nm).

[0072] In addition, based on the above-mentioned Figures 2, 3 and 4, Comparative Example 3 is additionally introduced, which is a display panel in which the color filter layer 105 in the corresponding embodiment of Figure 2 is replaced by a polarizer. Exemplarily, when the same white light intensity needs to be output, the respective parameters of the display panel provided by the corresponding embodiment of Figure 2, the display panel provided by Comparative Example 1, the display panel provided by Comparative Example 2, and the display panel provided by Comparative Example 3 are shown in Table 1. Table 1

[0073] As can be seen from Table 1, the light extraction efficiency of the corresponding embodiment of Figure 2 is higher than that of Comparative Examples 1, 2 and 3, and the power consumption of the corresponding embodiment of Figure 2 is lower than that of Comparative Examples 1, 2 and 3.

[0074] In addition, the display panel provided by the embodiments of the present disclosure further comprises a protective cover plate 107 disposed on the side of the planar layer 106 away from the substrate 101, which can be used to isolate air and moisture from entering the display panel, thereby avoiding the devices in the display panel from being eroded.

[0075] In summary, the display panel provided by the embodiment of the present disclosure has the following advantages. The material composition of the red filter unit 201 of the color film layer 105 of the display panel includes 1, 5-substituted alkyl amine anthraquinone red dye; the blue dye of the blue filter unit 202 includes at least one of 1, 4-substituted alkyl amine blue dye or hydroxy anthraquinone blue dye; and the green filter unit 203 includes 1, 4-substituted alkyl amine anthraquinone green dye. In some embodiments, anthraquinone is an anthracene compound having a carbonyl group at 9, 10 positions, and belongs to a fused ring compound. The anthraquinone has a stable aromatic conjugated structure in the molecule, which can increase the electron-withdrawing of the dye. When the mass percentage content of the 1, 5-substituted alkyl amine anthraquinone red dye is 0.5% to 20%, the mass percentage content of the blue dye is 0.5% to 20%, and the mass percentage content of the 1, 4-substituted alkyl amine anthraquinone green dye is 0.5% to 20%, the 1, 5-substituted alkyl amine anthraquinone red dye, the blue dye, and the 1, 4-substituted alkyl amine anthraquinone green dye carry sufficient electrons, which can respectively narrow the spectrum of the red light passing through the red filter unit 201 containing the 1, 5-substituted alkyl amine anthraquinone red dye, narrow the spectrum of the blue light passing through the blue filter unit 202 containing at least one of the 1, 4-substituted alkyl amine blue dye or the hydroxy anthraquinone blue dye, and narrow the spectrum of the green light passing through the green filter unit 203 containing the 1, 4-substituted alkyl amine anthraquinone green dye.

[0076] In this way, the wavelength difference between the wavelength corresponding to the spectral peak of the red light emitted by the red light-emitting device and the wavelength corresponding to the spectral peak of the red light after passing through the red filter unit 201 is small; the wavelength difference between the wavelength corresponding to the spectral peak of the blue light emitted by the blue light-emitting device and the wavelength corresponding to the spectral peak of the blue light after passing through the blue filter unit 202 is small; and the wavelength difference between the wavelength corresponding to the spectral peak of the green light emitted by the green light-emitting device and the wavelength corresponding to the spectral peak of the green light after passing through the green filter unit 203 is small. Therefore, the conversion efficiency of the red filter unit 201, the blue filter unit 202, and the green filter unit 203 for light is high, which can reduce the power consumption of the display panel. In addition, the difference between the color coordinates of the red light emitted by the red light-emitting device and the color coordinates of the red light after passing through the red filter unit 201 is small, the difference between the color coordinates of the blue light emitted by the blue light-emitting device and the color coordinates of the blue light after passing through the blue filter unit 202 is small, and the difference between the color coordinates of the green light emitted by the green light-emitting device and the color coordinates of the green light after passing through the green filter unit 203 is small. Therefore, the color gamut coverage of the display panel can be improved, the color level and smooth transition of the displayed image can be improved, and the display effect can be improved.

[0077] In addition, the display device provided by the embodiments of the present disclosure includes the display panel provided by the above embodiments of the present disclosure. The display device can be an AR device, a VR device, a mobile electronic device, or the like, which is not limited herein.

[0078] In the above description, the technical details of the configuration of each layer and the like are not described in detail. However, it should be understood by those skilled in the art that the layers, regions, and the like of the desired shape can be formed by various technical means. In addition, those skilled in the art can also design methods that are not exactly the same as the methods described above in order to form the same structure. In addition, although each embodiment is described above, this does not mean that the measures in each embodiment cannot be used advantageously in combination.

[0079] Although the preferred embodiments of the present disclosure have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all the preferred embodiments and all the changes and modifications falling within the scope of the present disclosure.

[0080] Obviously, those skilled in the art can make various modifications and variations to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure also intends to include these modifications and variations.

Claims

1. A display panel, comprising: a substrate substrate; a driving device layer disposed on one side of the substrate substrate; a light emitting device layer disposed on a side of the driving device layer away from the substrate substrate, the light emitting device layer comprising a plurality of red light emitting devices, a plurality of blue light emitting devices, and a plurality of green light emitting devices, and the plurality of red light emitting devices, the plurality of blue light emitting devices, and the plurality of green light emitting devices being electrically connected to the driving device layer respectively, the driving device layer being configured to drive the plurality of red light emitting devices, the plurality of blue light emitting devices, and the plurality of green light emitting devices to emit light respectively; and a color filter layer disposed on a side of the light emitting device layer away from the substrate substrate, the color filter layer comprising red filter units corresponding to the plurality of red light emitting devices respectively, blue filter units corresponding to the plurality of blue light emitting devices respectively, and green filter units corresponding to the plurality of green light emitting devices respectively; wherein a material component of the red filter units comprises a 1, 5-substituted alkyl amine anthraquinone red dye, and a mass percentage content of the 1, 5-substituted alkyl amine anthraquinone red dye is 0.5% to 20%; a material component of the blue filter units comprises a blue dye, the blue dye comprising at least one of a 1, 4-substituted alkyl amine blue dye or a hydroxyl anthraquinone blue dye, and a mass percentage content of the blue dye is 0.5% to 20%; and the green filter units comprise a 1, 4-substituted alkyl amine anthraquinone green dye, and a mass percentage content of the 1, 4-substituted alkyl amine anthraquinone green dye is 0.5% to 20%. The 1, 5-substituted alkyl amine anthraquinone red dye is configured to make a range of a wavelength variation value at a peak of a spectrum of red light rays passing through the red filter units satisfy a condition 0nm < λ < 10nm, wherein λ is the wavelength variation value. The blue dye is configured to make a range of a wavelength variation value at a peak of a spectrum of blue light rays passing through the blue filter units satisfy a condition 0nm < λ < 5nm, wherein λ is the wavelength variation value. The 1, 4-substituted alkyl amine anthraquinone green dye is configured to make a range of a wavelength variation value at a peak of a spectrum of green light rays passing through satisfy a condition 0nm < λ < 5nm, wherein λ is the wavelength variation value. The 1, 5-substituted alkyl amine anthraquinone red dye is configured to make a variation value of color coordinates of red light rays passing through the red filter units satisfy 0 ≤ ΔCIEx1 ≤ 0.02, 0 ≤ ΔCIEy1 ≤ 0.02, wherein ΔCIEx1 is a variation value of the color coordinates of the red light rays in an X-axis direction, and ΔCIEy1 is a variation value of the color coordinates of the red light rays in a Y-axis direction. ​ ​ ​ ​ ​ 2. The display panel of claim 1, wherein, The 1,5-substituted alkylamine anthraquinone-based red dyes have a chemical general formula (I), wherein the chemical general formula (I) is The two substituents R at the 1-substituted position and the 5-substituted position in the chemical general formula (I) are each independently selected from one of SC6H5, NHC6H11, or NHC6H4.

3. The display panel of claim 1, wherein, The blue dye has the chemical general formula (II), wherein the chemical general formula (II) is The two substituents X at the 1-substitution position and the 4-substitution position in the chemical general formula (II) are each independently selected from one of -NHCH3, -NHCH2CH3, -NH(CH2)3CH3, -OH.

4. The display panel of claim 1, wherein, The 1,4-substituted alkylamine anthraquinone green dye is a monoazo anthraquinone green dye having a chemical general formula (III), wherein the chemical general formula (III) is The substituent X at the 1-substituted position in the chemical general formula (III) is an alkylamine -NH3, and the substituent X at the 4-substituted position is 5. The display panel of claim 1, wherein, ​ 6. The display panel of claim 1, wherein, ​ 7. The display panel of claim 1, wherein, ​ 8. The display panel of any of claims 1-7, wherein, ​ 9. The display panel of any of claims 1-7, wherein, The blue dye is used to make the variation value of the color coordinates of the blue light rays passing through the blue filter unit satisfy 0≤ΔCIEx2≤0.06, 0≤ΔCIEy2≤0.06, wherein ΔCIEx2 is the variation value of the color coordinates of the blue light rays in the X-axis direction, and ΔCIEy2 is the variation value of the color coordinates of the blue light rays in the Y-axis direction.

10. The display panel of any of claims 1-7, wherein, The 1,4-substituted alkyl amine anthraquinone green dye is used to make the variation value of the color coordinates of the green light rays passing through the green filter unit satisfy 0≤ΔCIEx3≤0.06, 0≤ΔCIEy3≤0.06, wherein ΔCIEx3 is the variation value of the color coordinates of the green light rays in the X-axis direction, and ΔCIEy3 is the variation value of the color coordinates of the green light rays in the Y-axis direction.

11. The display panel of any of claims 1-7, wherein, The side of the color filter layer away from the substrate is provided with a planar layer, the refractive index of the planar layer is greater than the refractive index of the color filter layer, and the difference between the refractive index of the planar layer and the refractive index of the color filter layer is greater than 0.

18.

12. A display device comprising the display panel of any one of claims 1-11.

Images