Display substrate, manufacturing method thereof and display device

Abstract

The invention provides a display substrate, a manufacturing method thereof and a display device, and belongs to the technical field of display. The display base plate comprises a substrate base plate, a first electrode and a second electrode, a plurality of light-emitting devices located on the substrate, wherein the light-emitting devices comprise blue light devices; the peak wavelength of the transmission spectrum of the regulation and control layer is the same as the peak wavelength of the light-emitting spectrum of the blue light device, and the first wavelength range of the transmission spectrum of the regulation and control layer comprises the wavelength range corresponding to the light-emitting spectrum of the blue light device; the half-wave peak width of the regulation and control layer is more than two times of the half-wave peak width of the blue light device, and the first wavelength range is a partial wavelength range corresponding to a transmission spectrum of the regulation and control layer. The color gamut coverage rate of the display substrate can be increased.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display substrate and a manufacturing method thereof, and a display device. Background Art

[0002] OLED (Organic Light-Emitting Diode) display devices have been listed as the next generation display technology with great development prospects due to their advantages such as thinness, lightness, wide viewing angle, active light emission, continuously adjustable light color, low cost, fast response speed, low energy consumption, low driving voltage, wide operating temperature range, simple production process, high light emission efficiency and flexible display. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a display substrate and a manufacturing method thereof, and a display device, which can improve the color gamut coverage of the display substrate.

[0004] To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0005] In one aspect, a display substrate is provided, comprising:

[0006] substrate substrate;

[0007] A plurality of light emitting devices located on the substrate, wherein the light emitting devices include blue light devices;

[0008] A regulating layer is located on the light-emitting side of the blue light device, the peak wavelength of the transmission spectrum of the regulating layer is the same as the peak wavelength of the luminescence spectrum of the blue light device, the first wavelength range of the transmission spectrum of the regulating layer includes the wavelength range corresponding to the luminescence spectrum of the blue light device, the half-wave peak width of the regulating layer is more than twice the half-wave peak width of the blue light device, wherein the first wavelength range is a partial wavelength range corresponding to the transmission spectrum of the regulating layer.

[0009] In some embodiments, the first wavelength range is from a peak wavelength corresponding to 1% transmittance to a cutoff wavelength corresponding to 1% transmittance.

[0010] In some embodiments, the half-wave peak width of the regulating layer is more than 5 times the half-wave peak width of the blue light device.

[0011] In some embodiments, the peak wavelength of the transmission spectrum of the regulating layer is A, the peak wavelength of the emission spectrum of the blue light device is B, A is smaller than B, and the difference between A and B is not less than 60 nm.

[0012] In some embodiments, the cutoff wavelength of the transmission spectrum of the regulating layer is C, the cutoff wavelength of the emission spectrum of the blue light device is D, C is greater than D, and the difference between C and D is no greater than 40 nm.

[0013] In some embodiments, the regulating layer is made of at least one of the following: phthalocyanine organic pigments, diketopyrrolopyrrole organic pigments, and diketopyrrolopyrrole organic pigments.

[0014] In some embodiments, the microcavity length of the blue light device is greater than 260 nm.

[0015] An embodiment of the present invention further provides a display device, comprising the display substrate as described above.

[0016] An embodiment of the present invention further provides a method for manufacturing a display substrate, comprising:

[0017] Providing a substrate;

[0018] forming a plurality of light emitting devices on the base substrate, wherein the light emitting devices include blue light devices;

[0019] A regulating layer is formed on the light-emitting side of the blue light device, the peak wavelength of the transmission spectrum of the regulating layer is the same as the peak wavelength of the emission spectrum of the blue light device, the first wavelength range of the transmission spectrum of the regulating layer includes the wavelength range corresponding to the emission spectrum of the blue light device, the half-wave peak width of the regulating layer is more than twice the half-wave peak width of the blue light device, wherein the first wavelength range is a partial wavelength range corresponding to the transmission spectrum of the regulating layer.

[0020] In some embodiments, forming the regulating layer comprises:

[0021] The regulating layer is formed on the light-emitting side of the blue light device by evaporation using at least one of the following materials: phthalocyanine organic pigments, diketopyrrolopyrrole organic pigments, and diketopyrrolopyrrole organic pigments.

[0022] In some embodiments, at least one of the following materials is dispersed in gelatin, acrylic resin or polyvinyl alcohol resin to obtain a mixture material: phthalocyanine organic pigment, diketopyrrolopyrrole organic pigment, diketopyrrolopyrrole organic pigment;

[0023] The regulating layer is obtained by coating the mixture material or inkjet printing the mixture material on the light-emitting side of the blue light device.

[0024] The embodiments of the present invention have the following beneficial effects:

[0025] In the above scheme, by setting a regulating layer on the light-emitting side of the blue light device, the luminous spectrum of the blue light emitted by the blue light device can be modulated, and while reducing the blue light color coordinate Bx, the blue light color coordinate By can be avoided from significantly increasing, thereby ensuring the color gamut coverage of the luminous spectrum of the display substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic cross-sectional view showing a substrate according to an embodiment of the present invention;

[0027] Figure 2 A schematic plan view showing a substrate according to an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of the light emission spectrum of the control layer and the light emitting device according to an embodiment of the present invention;

[0029] Figure 4 and Figure 5 A schematic diagram showing the color gamut coverage of a substrate according to an embodiment of the present invention;

[0030] Figure 6 Schematic diagram of the transmittance spectrum of the control layer at different viewing angles according to an embodiment of the present invention;

[0031] Figure 7 A schematic diagram showing the brightness attenuation of blue light from a display substrate at different viewing angles according to an embodiment of the present invention;

[0032] Figure 8 A schematic diagram of a chromatic color deviation trajectory of a white light viewing angle of a display substrate according to an embodiment of the present invention;

[0033] Fig. 9 It is a schematic diagram showing the brightness attenuation of white light from a display substrate at different viewing angles according to an embodiment of the present invention.

[0034] Reference numerals

[0035] 01 Substrate

[0036] 02 Blue light devices

[0037] 03 Encapsulation layer

[0038] 04 Control Layer DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0040] Active matrix organic light emitting devices (AMOLED) have the advantages of low power consumption, high contrast, and vivid colors. As people put forward higher requirements for the picture quality of games, audio and video notebooks or desktop computers with integrated AMOLED displays, the BT2020 (color space standard established by the International Telecommunication Union) color gamut standard has been proposed. The BT2020 color gamut standard corresponds to the red (R) light color coordinates (Rx = 0.708, Ry = 0.292), the green (G) light color coordinates are (Gx = 0.17, Gy = 0.797), and the blue (B) light color coordinates are (Bx = 0.131, By = 0.046).

[0041] In the related technology, 97% color gamut coverage has been achieved for BT2020 (CIE1976) by optimizing the selection and structure of deep red and deep green luminescent materials. However, the blue light Bx of current display products is usually only 0.14, which is greater than the 0.131 required by BT2020, resulting in a loss of color gamut coverage.

[0042] In order to reduce the Bx of blue light, the structure of the blue light device can be adjusted, such as increasing the microcavity length of the blue light device to reduce Bx; however, when the related technology adjusts the structure of the blue light device, although Bx can be reduced, By will increase significantly, and the color gamut coverage cannot be effectively improved.

[0043] Embodiments of the present invention provide a display substrate and a manufacturing method thereof, and a display device, which can improve the color gamut coverage of the display substrate.

[0044] An embodiment of the present invention provides a display substrate, such as Figure 1 and Figure 2 As shown, including:

[0045] Substrate substrate 01;

[0046] A plurality of light emitting devices located on the base substrate 01, wherein the light emitting devices include a blue light device 02;

[0047] The regulating layer 04 is located on the light-emitting side of the blue light device 02, the peak wavelength of the transmission spectrum of the regulating layer 04 is the same as the peak wavelength of the luminescence spectrum of the blue light device 02, the first wavelength range of the transmission spectrum of the regulating layer 04 includes the wavelength range corresponding to the luminescence spectrum of the blue light device 02, the half-wave peak width of the regulating layer 04 is more than twice the half-wave peak width of the blue light device 02, wherein the first wavelength range is a partial wavelength range corresponding to the transmission spectrum of the regulating layer 04.

[0048] In this embodiment, the display substrate may further include an encapsulation layer 03 located on the light-emitting side of the blue light device 02 , and the regulation layer 04 may be located on a side of the encapsulation layer 03 away from the base substrate 01 .

[0049] In this embodiment, by setting a regulating layer on the light-emitting side of the blue light device, the luminous spectrum of the blue light emitted by the blue light device can be modulated, and while reducing the blue light color coordinate Bx, the blue light color coordinate By can be avoided from significantly increasing, thereby ensuring the color gamut coverage of the luminous spectrum of the display substrate.

[0050] In this embodiment, the peak wavelength of the transmission spectrum is the wavelength corresponding to the maximum transmittance, the peak wavelength of the luminescence spectrum is the wavelength corresponding to the maximum luminous intensity of the luminescence spectrum, the half-wave peak width is the distance from the maximum amplitude of the wave to the half amplitude, and the first wavelength range can be the peak wavelength corresponding to 1% transmittance to the cut-off wavelength corresponding to 1% transmittance. In this embodiment, by designing the parameters of the regulating layer 04, the matching degree of the blue light emitted by the display substrate with the requirements of CIE and BT2020 can be improved.

[0051] In this embodiment, the regulating layer 04 may be made of at least one of the following: phthalocyanine organic pigments, diketopyrrolopyrrole organic pigments, and diketopyrrolopyrrole organic pigments. In some embodiments, the regulating layer 04 may be made of copper phthalocyanine, which has a strong absorption of light in the wavelength range of 560nm-610nm, and can absorb the long wavelength band of the photoluminescence spectrum (PL spectrum) of green light emitting materials and the short wavelength band of the PL spectrum of red light emitting materials. In combination with other materials that absorb the long wavelength band, only the blue light band can be transmitted.

[0052] In this embodiment, the regulating layer 04 can be formed by evaporation, or at least one of the following materials is dispersed in gelatin, acrylic resin or polyvinyl alcohol resin to obtain a mixture material: phthalocyanine organic pigments, diketopyrrolopyrrole organic pigments, pyrrolopyrrole diketo organic pigments, and then the regulating layer 04 is formed on the light-emitting side of the blue light device by coating exposure or inkjet printing coating.

[0053] In this embodiment, the blue light device can be structurally adjusted to increase the microcavity length of the blue light device so that the microcavity length of the blue light device is greater than 260 nm. The color gamut coverage of the display substrate can be effectively improved by structural adjustment combined with setting a control layer.

[0054] Figure 3The electroluminescence spectrum of the blue light device, the electroluminescence spectrum after structural adjustment of the blue light device, the transmittance spectrum of the regulation layer, and the electroluminescence spectrum of the blue light device after structural adjustment of the blue light device (increasing the microcavity length) and setting the regulation layer on the light-emitting side of the blue light device are shown. It can be seen that after only the structural adjustment of the blue light device, the electroluminescence spectrum is red-shifted as a whole. Although Bx can be reduced, the increase in By is greater, that is, △Bx (0.005) <△By (0.009). Therefore, the color gamut coverage of BT2020 cannot be improved by only adjusting the structure of the blue light device. In order to reduce By, this embodiment adds a regulating layer on the light-emitting side of the blue light device, and designs the parameters of the regulating layer: the peak wavelength of the transmission spectrum of the regulating layer is designed to be the same as the peak wavelength of the luminescence spectrum of the blue light device, the first wavelength range of the transmission spectrum of the regulating layer includes the wavelength range corresponding to the luminescence spectrum of the blue light device, and the half-wave peak width of the regulating layer is more than 5 times the half-wave peak width of the blue light device; and the cutoff wavelength of the transmission spectrum of the regulating layer is C, and the cutoff wavelength of the luminescence spectrum of the blue light device is D, C is greater than D, and the difference between C and D is not greater than 40nm, so that the transmission spectrum can suppress the luminescence intensity of the long-wave band of the electroluminescence spectrum, thereby suppressing the increase of △By after the microcavity length of the blue light device increases. Table 1 shows the color coordinates of different blue light devices, the electroluminescence spectrum of the blue light device, the electroluminescence spectrum after the blue light device is structurally adjusted, the transmission spectrum of the regulating layer, and the parameters of the electroluminescence spectrum of the blue light device after the blue light device is structurally adjusted and the regulating layer is set on the light-emitting side of the blue light device. It can be seen from Table 1 that after adjusting the structure of the blue light device and setting a regulating layer on the light-emitting side of the blue light device, △Bx(0.004)>△By(0.003), thereby improving the BT2020 color gamut coverage.

[0055] Table 1

[0056]

[0057]

[0058]

[0059] Figure 4 This is a schematic diagram of the color gamut coverage corresponding to CIE1931. It can be seen that when using a blue light device that has not undergone structural adjustment, the color gamut coverage of the display substrate is 95.5%; when using a blue light device that has undergone structural adjustment (increasing the microcavity length), the color gamut coverage of the display substrate is 95.3%, and the color gamut coverage has decreased instead of increased; after structural adjustment of the blue light device (increasing the microcavity length) and setting a regulating layer on the light-emitting side of the blue light device, the BT2020 color gamut coverage of the display substrate reaches 95.9%, which is close to 96%, and can greatly improve the color gamut coverage of the display substrate.

[0060] Figure 5 This is a schematic diagram of the color gamut coverage corresponding to CIE1976. It can be seen that when using a blue light device that has not undergone structural adjustment, the color gamut coverage of the display substrate is 97.2%; when using a blue light device that has undergone structural adjustment (increasing the microcavity length), the color gamut coverage of the display substrate is 95.8%, and the color gamut coverage has decreased instead of increased; after structural adjustment of the blue light device (increasing the microcavity length) and setting a regulating layer on the light-emitting side of the blue light device, the BT2020 color gamut coverage of the display substrate reaches 98.2%, which exceeds 98%, and can greatly improve the color gamut coverage of the display substrate.

[0061] Table 2 shows the color coordinates and color gamut coverage of the BT2020 standard, the color coordinates and color gamut coverage of high color gamut products, the color coordinates and color gamut coverage of the blue light devices in high color gamut products after structural adjustment (increased microcavity length), and the color coordinates and color gamut coverage of the blue light devices in high color gamut products after structural adjustment (increased microcavity length) and adding a regulating layer on the light output side.

[0062] Table 2

[0063]

[0064]

[0065] It can be seen that after structural adjustment and the setting of the regulation layer, the blue light device achieved a BT2020 color gamut coverage of nearly 96% @CIE1931 and a color gamut coverage of more than 98% @CIE1976, greatly increasing the color gamut coverage of the display substrate.

[0066] In some embodiments, the peak wavelength of the transmission spectrum of the regulating layer is A, the peak wavelength of the emission spectrum of the blue light device is B, A is smaller than B, and the difference between A and B is not less than 60nm, so as to minimize the impact on the blue light viewing angle brightness attenuation.

[0067] Figure 6 This is a schematic diagram of the transmittance spectrum of the regulating layer of an embodiment of the present invention at different viewing angles, which shows the transmittance spectrum of the regulating layer at viewing angles of 0°, 30°, 45° and 60°. It can be seen that as the viewing angle increases, the optical path of the light output from the blue light device in the regulating layer increases and the transmittance decreases, and the larger the viewing angle, the greater the decrease in transmittance at the same wavelength, which is manifested as a narrowing of the transmission spectrum.

[0068] Figure 7The diagram is a schematic diagram of the viewing angle attenuation curve of the blue light device after the regulating layer is set on the light output side of the blue light device according to the embodiment of the present invention. The diagram shows the viewing angle attenuation curve of the blue light device with By of 0.044, the viewing angle attenuation curve of the blue light device with By of 0.053, the viewing angle attenuation curve after the regulating layer is set on the light output side of the blue light device with By of 0.044, and the viewing angle attenuation curve after the regulating layer is set on the light output side of the blue light device with By of 0.053. Table 3 shows the values ​​of the viewing angle attenuation of the blue light device after the regulating layer is set on the light output side of the blue light device.

[0069] Table 3

[0070]

[0071] It can be seen that the control layer will accelerate the viewing angle brightness attenuation of blue light, and as the viewing angle increases, the acceleration increases. In this embodiment, in order to reduce Bx to meet the BT2020 requirements, the microcavity length is increased in the device structure (By will be increased synchronously); at the same time, in order to maintain By, the control layer is introduced, so that the microcavity length can be increased first to slow down the viewing angle brightness attenuation, and then the control layer is introduced to accelerate the viewing angle brightness attenuation, experiencing an increase first and then a decrease. Compared with the blue light device directly combined with the control layer without structural adjustment, the viewing angle brightness attenuation of this embodiment is slowed down.

[0072] Figure 8 This is a schematic diagram of the visual color deviation trajectory of white light of the display substrate of the embodiment of the present invention, which shows the visual color deviation trajectory of white light emitted by the display substrate after the blue light device is directly combined with the regulating layer without structural adjustment, and the visual color deviation trajectory of white light emitted by the display substrate after the blue light device is combined with the regulating layer after structural adjustment. Among them, the three elliptical closed figures are 3.0JNCD (Just Noticeable Color Difference, minimum perceptible color difference), 4.5JNCD and 7.0JNCD from inside to outside. Fig. 9 This is a schematic diagram of the brightness attenuation of white light from a display substrate at different viewing angles according to an embodiment of the present invention, which shows a color deviation curve of white light emitted by a display substrate at different viewing angles when a blue light device is directly combined with a regulating layer without structural adjustment, and a color deviation curve of white light emitted by a display substrate at different viewing angles when a blue light device is combined with a regulating layer after structural adjustment.

[0073] Table 4 shows the color deviation values ​​of white light emitted by the display substrate at different viewing angles when the blue light device is directly combined with the regulating layer without structural adjustment, and the color deviation values ​​of white light emitted by the display substrate at different viewing angles when the blue light device is combined with the regulating layer after structural adjustment.

[0074] Table 4

[0075]

[0076]

[0077] It can be seen that after the blue light device is structurally adjusted and combined with the setting of the regulating layer, the color deviation value of white light with a large viewing angle (≥45°) is significantly reduced, which can improve the color deviation phenomenon with a large viewing angle and improve the display quality of the display substrate.

[0078] An embodiment of the present invention further provides a display device, comprising the display substrate as described above.

[0079] The display device includes but is not limited to: a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply. Those skilled in the art will appreciate that the structure of the above-mentioned display device does not constitute a limitation on the display device, and the display device may include more or less of the above-mentioned components, or a combination of certain components, or different component arrangements. In an embodiment of the present invention, the display device includes but is not limited to a display, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.

[0080] The display device may be any product or component with a display function, such as a television, a monitor, a digital photo frame, a mobile phone, a tablet computer, etc., wherein the display device further includes a flexible circuit board, a printed circuit board and a backplane.

[0081] An embodiment of the present invention further provides a method for manufacturing a display substrate, which is used to manufacture the above-mentioned display substrate. The manufacturing method includes:

[0082] Providing a substrate;

[0083] forming a plurality of light emitting devices on the base substrate, wherein the light emitting devices include blue light devices;

[0084] A regulating layer is formed on the light-emitting side of the blue light device, the peak wavelength of the transmission spectrum of the regulating layer is the same as the peak wavelength of the emission spectrum of the blue light device, the first wavelength range of the transmission spectrum of the regulating layer includes the wavelength range corresponding to the emission spectrum of the blue light device, the half-wave peak width of the regulating layer is more than twice the half-wave peak width of the blue light device, wherein the first wavelength range is a partial wavelength range corresponding to the transmission spectrum of the regulating layer.

[0085] In this embodiment, by setting a regulating layer on the light-emitting side of the blue light device, the luminous spectrum of the blue light emitted by the blue light device can be modulated, and while reducing the blue light color coordinate Bx, the blue light color coordinate By can be avoided from significantly increasing, thereby ensuring the color gamut coverage of the luminous spectrum of the display substrate.

[0086] In this embodiment, the peak wavelength of the transmission spectrum is the wavelength corresponding to the maximum transmittance, the peak wavelength of the luminescence spectrum is the wavelength corresponding to the maximum luminous intensity of the luminescence spectrum, the half-wave peak width is the distance from the maximum amplitude of the wave to the half amplitude, and the first wavelength range can be the peak wavelength corresponding to 1% transmittance to the cut-off wavelength corresponding to 1% transmittance. In this embodiment, by designing the parameters of the regulating layer 04, the matching degree of the blue light emitted by the display substrate with the requirements of CIE and BT2020 can be improved.

[0087] In some embodiments, forming the regulating layer comprises:

[0088] The regulating layer is formed on the light-emitting side of the blue light device by evaporation using at least one of the following materials: phthalocyanine organic pigments, diketopyrrolopyrrole organic pigments, and diketopyrrolopyrrole organic pigments.

[0089] In some embodiments, at least one of the following materials is dispersed in gelatin, acrylic resin or polyvinyl alcohol resin to obtain a mixture material: phthalocyanine organic pigment, diketopyrrolopyrrole organic pigment, diketopyrrolopyrrole organic pigment;

[0090] The regulating layer is obtained by coating the mixture material or inkjet printing the mixture material on the light-emitting side of the blue light device.

[0091] In this embodiment, the blue light device can be structurally adjusted to increase the microcavity length of the blue light device so that the microcavity length of the blue light device is greater than 260 nm. The color gamut coverage of the display substrate can be effectively improved by structural adjustment combined with setting a control layer.

[0092] In order to reduce By, this embodiment adds a regulating layer on the light-emitting side of the blue light device, and designs the parameters of the regulating layer: the peak wavelength of the transmission spectrum of the regulating layer is designed to be the same as the peak wavelength of the luminescence spectrum of the blue light device, the first wavelength range of the transmission spectrum of the regulating layer includes the wavelength range corresponding to the luminescence spectrum of the blue light device, and the half-wave peak width of the regulating layer is more than 5 times the half-wave peak width of the blue light device; and the cut-off wavelength of the transmission spectrum of the regulating layer is C, and the cut-off wavelength of the luminescence spectrum of the blue light device is D, C is greater than D, and the difference between C and D is not greater than 40nm, so that the transmission spectrum can suppress the luminescence intensity of the long-wave band of the electroluminescence spectrum, thereby suppressing the increase of △By after the microcavity length of the blue light device increases.

[0093] In some embodiments, the peak wavelength of the transmission spectrum of the regulating layer is A, the peak wavelength of the emission spectrum of the blue light device is B, A is smaller than B, and the difference between A and B is not less than 60nm, so as to minimize the impact on the blue light viewing angle brightness attenuation.

[0094] In this embodiment, the control layer will accelerate the viewing angle brightness decay of blue light, and as the viewing angle increases, the acceleration increases. In this embodiment, in order to reduce Bx to meet the BT2020 requirements, the microcavity length is increased in the device structure (By will be increased synchronously); at the same time, in order to maintain By, the control layer is introduced, so that the microcavity length can be increased first to slow down the viewing angle brightness decay, and then the control layer is introduced to accelerate the viewing angle brightness decay, experiencing an increase first and then a decrease. Compared with the blue light device directly combined with the control layer without structural adjustment, the viewing angle brightness decay of this embodiment is slowed down.

[0095] In this embodiment, after the blue light device is structurally adjusted and combined with the setting of the regulating layer, the color deviation value of white light with a large viewing angle (≥45°) can be significantly reduced, the color deviation phenomenon with a large viewing angle can be improved, and the display quality of the display substrate can be improved.

[0096] It should be noted that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments, since they are basically similar to the product embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the product embodiments.

[0097] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0098] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “under” another element, it can be “directly on” or “under” the other element or intervening elements may be present.

[0099] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0100] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A display substrate, characterized in that: include: substrate substrate; A plurality of light emitting devices located on the substrate, wherein the light emitting devices include blue light devices; A regulating layer is located on the light-emitting side of the blue light device, the peak wavelength of the transmission spectrum of the regulating layer is the same as the peak wavelength of the luminescence spectrum of the blue light device, the first wavelength range of the transmission spectrum of the regulating layer includes the wavelength range corresponding to the luminescence spectrum of the blue light device, the half-wave peak width of the regulating layer is more than twice the half-wave peak width of the blue light device, wherein the first wavelength range is a partial wavelength range corresponding to the transmission spectrum of the regulating layer.

2. The display substrate according to claim 1, characterized in that: The first wavelength range is from a peak wavelength corresponding to 1% transmittance to a cutoff wavelength corresponding to 1% transmittance.

3. The display substrate according to claim 1, characterized in that: The half-wave peak width of the regulating layer is more than 5 times the half-wave peak width of the blue light device.

4. The display substrate according to any one of claims 1 to 3, characterized in that: The peak wavelength of the transmission spectrum of the regulating layer is A, the peak wavelength of the emission spectrum of the blue light device is B, A is smaller than B, and the difference between A and B is not less than 60nm.

5. The display substrate according to any one of claims 1 to 3, characterized in that: The cutoff wavelength of the transmission spectrum of the regulating layer is C, the cutoff wavelength of the light emitting spectrum of the blue light device is D, C is greater than D, and the difference between C and D is not greater than 40nm.

6. The display substrate according to any one of claims 1 to 3, characterized in that: The regulating layer is made of at least one of the following: phthalocyanine organic pigments, diketopyrrolopyrrole organic pigments, and diketopyrrolopyrrole organic pigments.

7. The display substrate according to any one of claims 1 to 3, characterized in that: The microcavity length of the blue light device is greater than 260 nm.

8. A display device, characterized in that: The invention comprises a display substrate as claimed in any one of claims 1 to 7.

9. A method for manufacturing a display substrate, characterized in that: include: Providing a substrate; forming a plurality of light emitting devices on the base substrate, wherein the light emitting devices include blue light devices; A regulating layer is formed on the light-emitting side of the blue light device, the peak wavelength of the transmission spectrum of the regulating layer is the same as the peak wavelength of the emission spectrum of the blue light device, the first wavelength range of the transmission spectrum of the regulating layer includes the wavelength range corresponding to the emission spectrum of the blue light device, the half-wave peak width of the regulating layer is more than twice the half-wave peak width of the blue light device, wherein the first wavelength range is a partial wavelength range corresponding to the transmission spectrum of the regulating layer.

10. The method for manufacturing a display substrate according to claim 9, characterized in that: Forming the regulating layer comprises: The regulating layer is formed on the light-emitting side of the blue light device by evaporation using at least one of the following materials: phthalocyanine organic pigments, diketopyrrolopyrrole organic pigments, and diketopyrrolopyrrole organic pigments; or At least one of the following materials is dispersed in gelatin, acrylic resin or polyvinyl alcohol resin to obtain a mixture material: phthalocyanine organic pigment, diketopyrrolopyrrole organic pigment, pyrrolopyrrole diketo organic pigment; the control layer is obtained by coating the mixture material on the light output side of the blue light device or inkjet printing the mixture material.

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