Display panel and manufacturing method thereof

Abstract

Embodiments of the present application disclose a display panel and a manufacturing method thereof. The display panel comprises a blue light emitting source, a color filter layer, a quantum dot layer and a blue light filter layer. The color filter layer is located on one side of the blue light emitting source, and comprises a plurality of filter units, each of which comprises at least a red light filter unit and a green light filter unit. The quantum dot layer is located on the side of the color filter layer close to the blue light emitting source, and comprises quantum dot units corresponding to the filter units one by one, each of which comprises a light transmission unit, a red light quantum dot unit corresponding to the red light filter unit and a green light quantum dot unit corresponding to the green light filter unit. The blue light filter layer is located between the quantum dot layer and the blue light emitting source. The technical scheme of the embodiments of the present application reduces the reflection of the incident natural light and the scattered light when the quantum dot unit is photo-luminescent by the blue light emitting source, improves the display effect of the display panel, and also ensures that the display panel has a relatively low manufacturing cost.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display panel and a method for manufacturing the same. Background Technology

[0002] With the rapid development of display technology, various types of display panels have emerged. Quantum Dots (QD) display panels, as a new type of display panel, can revolutionarily achieve ultra-high color gamut display, faithfully reproducing image colors.

[0003] However, existing quantum dot display panels still suffer from poor display quality and high manufacturing costs. Summary of the Invention

[0004] This invention provides a display panel and a method for manufacturing the same, in order to improve the display effect of the display panel and reduce the manufacturing cost of the display panel.

[0005] In a first aspect, embodiments of the present invention provide a display panel, the display panel comprising: a blue light source, a color filter layer, a quantum dot layer, and a blue light filter layer;

[0006] The color filter layer is located on one side of the blue light source, and the color filter layer includes multiple filter units, each of which includes at least a red light filter unit and a green light filter unit;

[0007] The quantum dot layer is located on the side of the color filter layer closer to the blue light source. The quantum dot layer includes quantum dot units that correspond one-to-one with the filter units. Each quantum dot unit includes a light-transmitting unit, a red quantum dot unit corresponding to the red light filter unit, and a green quantum dot unit corresponding to the green light filter unit.

[0008] The blue light filter layer is located between the quantum dot layer and the blue light source.

[0009] Optionally, the material of the light-transmitting unit is a blue light filter material. This configuration not only ensures that the blue light emitted from the blue light source emitted from the display panel is purer, improving the display effect of the display panel, but also ensures that when natural light is incident on the blue light source, the light emitted from the quantum dot layer consists only of red, green, and blue light, with virtually no other colors present. This reduces the amount of natural light incident on the blue light source, prevents excessive reflection of natural light by the blue light source, and further enhances the display effect of the display panel.

[0010] Optionally, the light-transmitting unit and the blue light filter layer are integrally formed. With this configuration, the blue light filter layer, while reducing the reflection of incident natural and scattered light from the blue light source, can be made of the same material as the light-transmitting unit. This eliminates the need to add new materials to the display panel when setting the blue light filter layer, allowing the display panel to maintain its original material composition. Furthermore, it eliminates the need to form a separate film layer after setting the light-transmitting unit to set the blue light filter layer, or vice versa, resulting in a display panel with fewer film layers, simplifying manufacturing processes and facilitating production.

[0011] Optionally, the filtering unit further includes a blue light filtering unit, which corresponds to the light-transmitting unit. This not only makes the blue light emitted from the blue light source emitted from the display panel purer, further improving the display effect of the display panel, but also ensures that when natural light is incident on the blue light source, the light emitted from the quantum dot layer only contains red light, green light, and high-purity blue light. This reduces the amount of natural light incident on the blue light source, prevents the blue light source from reflecting a large amount of natural light, and further improves the display effect of the quantum dot display panel.

[0012] Optionally, the blue light filtering unit and the light-transmitting unit are integrally formed; and / or, the light-transmitting unit and the blue light filtering layer are integrally formed. In this way, both the blue light filtering unit and the light-transmitting unit, while making the blue light emitted from the display panel purer and reducing the reflection of natural light from the blue light source, can be formed using the same material and in the same process. This not only does not affect the original material types of the display panel but also saves on the number of film layers, ensuring a simple manufacturing process and ease of production. Furthermore, it reduces the reflection of natural light and scattered light from the blue light source by the blue light filtering layer, makes the blue light emitted from the display panel purer by both the blue light filtering unit and the light-transmitting unit, and ensures that the blue light filtering unit, the light-transmitting unit, and the blue light filtering layer are all made of the same material. This significantly improves the display effect without affecting the original material types of the display panel, ensuring a lower cost. Moreover, this setup can be completed in only one manufacturing process, greatly saving on the number of film layers and ensuring a simple manufacturing process.

[0013] Optionally, the light-transmitting unit is made of a transparent material; the light-filtering unit further includes a blue light filter unit, which is disposed opposite to the light-transmitting unit. This arrangement reduces the amount of material used in the blue light filter unit in the display panel, thus helping to control the cost of the display panel.

[0014] Optionally, the thickness of the blue light filter unit is between 1 μm and 5 μm. This setting ensures that the blue light filter unit has an appropriate thickness to better improve the display effect while controlling costs.

[0015] Optionally, the thickness of the blue light filter layer is between 1 μm and 10 μm. This setting ensures that the blue light filter layer can perform its function well, while also keeping the display panel at a lower cost and reducing the overall thickness of the display panel.

[0016] Optionally, the blue light source includes: an array substrate, a first electrode layer, a light-emitting layer, and a second electrode layer;

[0017] The first electrode layer is located on one side of the array substrate, the light-emitting layer is located on the side of the first electrode layer away from the array substrate, and the second electrode layer is located between the light-emitting layer and the blue light filter layer; the light-emitting layer emits blue light under the drive of the first electrode layer and the second electrode layer;

[0018] Preferably, the display panel further includes a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer; the hole injection layer is located on the side of the first electrode layer away from the array substrate, the hole transport layer is located between the hole injection layer and the light-emitting layer; the electron transport layer is located on the side of the light-emitting layer away from the hole transport layer, and the electron injection layer is located between the electron transport layer and the second electrode layer;

[0019] Preferably, the first electrode layer includes electrode units that correspond one-to-one with the filtering units, and each electrode unit includes a first electrode unit, a second electrode unit, and a third electrode unit that correspond to the red light filtering unit, the green light filtering unit, and the light-transmitting unit, respectively.

[0020] Secondly, embodiments of the present invention also provide a method for manufacturing a display panel, the method comprising:

[0021] Provides a blue light source;

[0022] A blue light filter layer is formed on one side of the blue light source;

[0023] A quantum dot layer is formed on the side of the blue light filter layer away from the blue light source. The quantum dot layer includes multiple quantum dot units, and each quantum dot unit includes a light-transmitting unit, a red light quantum dot unit, and a green light quantum dot unit.

[0024] A color filter layer is formed on the side of the quantum dot layer away from the blue light filter layer. The color filter layer includes filter units that correspond one-to-one with the quantum dot units. Each filter unit includes at least a red light filter unit corresponding to the red light quantum dot unit and a green light filter unit corresponding to the green light quantum dot unit.

[0025] Optionally, forming a blue light filter layer on one side of the blue light source includes:

[0026] An initial filter layer is formed on one side of the blue light source using a coating process or a vapor deposition process;

[0027] Multiple pits are formed on the initial filter layer to form a blue light filter unit and a blue light filter layer; wherein, the initial filter layer between the plane where the bottom surface of the pit is located and the plane where the bottom surface of the initial filter layer is located serves as the blue light filter layer, and the initial filter layer located between two adjacent pits and above the blue light filter layer serves as the blue light filter unit.

[0028] Forming a quantum dot layer on the side of the blue light filter layer away from the blue light source includes:

[0029] Initial quantum dot units are formed in the pits, each corresponding to a specific pit. Each initial quantum dot unit includes a red quantum dot unit and a green quantum dot unit. The blue light filtering unit serves as a light-transmitting unit. All the initial quantum dot units and all the light-transmitting units constitute a quantum dot layer.

[0030] The display panel and its manufacturing method provided in this invention, by setting a blue light filter layer between the quantum dot layer and the blue light source of the display panel, ensures that the red, green, blue, and a small amount of other colored light emitted after natural light passes through the color filter layer and the quantum dot layer in sequence first enters the blue light filter layer instead of the blue light source. The blue light filter layer has the effect of reflecting and transmitting the incoming blue light, while absorbing the incoming red, green, and other colored light. This greatly reduces the amount of natural light that can enter the blue light source, thereby preventing a large amount of reflection of natural light by the blue light source. This avoids a large amount of reflected natural light from the blue light source entering the quantum dot layer and affecting the display effect of the display panel. In this way, the present invention reduces the reflection of incident natural light by the blue light source and improves the display effect of the display panel.

[0031] Furthermore, by setting a blue light filter layer, some of the scattered light from the photoluminescence of the quantum dot units in the quantum dot layer first enters the blue light filter layer instead of the blue light source. The blue light filter layer absorbs both the incident red and green scattered light, thereby greatly reducing the amount of scattered light that can enter the blue light source. This prevents the blue light source from reflecting a large amount of scattered light, avoiding the large amount of reflected light from the blue light source entering the quantum dot layer and affecting the display effect of the display panel. In this embodiment of the invention, the reflection of scattered light from the incident quantum dot units during photoluminescence by the blue light source is reduced, further improving the display effect of the display panel. At the same time, the cost of setting a blue light filter layer is low, thus ensuring that the display panel has a low manufacturing cost. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a display panel in the prior art;

[0033] Figure 2 It is the light in Figure 1 A schematic diagram illustrating the propagation process within the display panel shown;

[0034] Figure 3 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

[0035] Figure 4 It is the light in Figure 3 A schematic diagram illustrating the propagation process within the display panel shown;

[0036] Figure 5 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0040] Figure 9 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0041] Figure 10 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0042] Figure 11 This is a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0044] As mentioned in the background section, existing quantum dot display panels still suffer from poor display quality and high manufacturing costs. The inventors have discovered the reasons for this as follows:

[0045] The structure of quantum dot display panels in existing technologies can be as follows: Figure 1 As shown, the quantum dot display panel includes a color filter layer 130, a quantum dot layer 120, and a blue light source 110 stacked sequentially. The color filter layer 130 includes a red light filter unit 131, a green light filter unit 132, and a blue light filter unit 133. The quantum dot layer 120 includes a red quantum dot unit 121 corresponding to the red light filter unit 131 and a green quantum dot unit 122 corresponding to the green light filter unit 132. Blue light emitted from the blue light source 110 enters the quantum dot layer 120. The quantum dots in the red quantum dot unit 121 absorb the short-wavelength blue light and excite the long-wavelength red light. The quantum dots in the green quantum dot unit 122 absorb the short-wavelength blue light and excite the long-wavelength green light. The short-wavelength blue light in the light-transmitting unit 123, which does not have quantum dot units, passes directly through. The red, green, and blue light pass through the corresponding color filter units and exit from the quantum dot display panel, thus enabling the display of an image.

[0046] The blue light source 110 comprises an array substrate 111, a first electrode layer 112, a light-emitting layer 113, and a second electrode layer 114, which are stacked sequentially. The first electrode layer 112 can be an anode, the second electrode layer 114 can be a cathode, and the light-emitting layer 113 can be made of light-emitting diode (LED) or organic light-emitting diode (OLED) material. The light-emitting layer 113 emits blue light under the drive of the first electrode layer 112 and the second electrode layer 114. Because the second electrode layer 114 is usually made of materials such as magnesium-aluminum alloy, it is prone to reflecting light incident on it. If the light reflected by the second electrode layer 114 enters the quantum dot layer 120, it will affect the display effect of the quantum dot display panel.

[0047] The light incident on the second electrode layer 114 includes at least two parts: natural light and scattered light from the photoluminescence of the quantum dot units. Figure 2 It is the light in Figure 1A schematic diagram illustrating the propagation process in the display panel, as shown below. Figure 2 As illustrated, natural light passes through the color filter layer 130 and the quantum dot layer 120 in sequence, and the emitted red, green, and blue light enters the second electrode layer 114. The second electrode layer 114 reflects all the emitted red, green, and blue light. When the reflected light enters the quantum dot layer 120, the reflected red light r passes through the red quantum dot unit 121 and the red filter unit 131 in sequence and is emitted from the quantum dot display panel. A portion of the reflected green light g passes through the green quantum dot unit and the green filter unit in sequence and is emitted from the quantum dot display panel, while a portion excites the red quantum dot unit to emit light. A portion of the reflected blue light b passes through the light transmission unit and is emitted from the quantum dot display panel, while a portion excites the green and red quantum dot units to emit light, thereby affecting the display effect of the quantum dot display panel.

[0048] Continue to refer to Figure 2 For example, when the green quantum dot unit 122 emits light, some of its scattered light enters the second electrode layer 114. The second electrode layer 114 reflects the incident green scattered light. When the reflected green scattered light g' enters the quantum dot layer 120, some of the green scattered light g' passes through the green quantum dot unit and the green light filter unit in sequence and is emitted from the quantum dot display panel. Some of the green scattered light g' enters the red quantum dot unit 121. The red quantum dot unit 121 is easily excited and emits light, thereby affecting the display effect of the quantum dot display panel.

[0049] In this regard, please continue to refer to Figure 1 or Figure 2 In the prior art, a polarizer structure 140 with a circular polarizer function is set on the light-emitting side of the color filter layer 130 of the quantum dot display panel. The purpose is to reduce the incidence of natural light on the second electrode layer 114 and reduce the reflection of natural light by the second electrode layer 114, thereby improving the display effect. Specifically, when natural light passes through the polarizer structure 140 before entering the second electrode layer 114, the transmittance of the natural light is reduced by about 50% due to the effect of the polarizer structure 140, thereby reducing the incident natural light on the second electrode layer 114. Furthermore, the remaining 50% or so of natural light that has passed through the polarizer structure 140 passes through the color filter layer 130 and the quantum dot layer 120 in sequence, and the emitted red, green, and blue light enters the second electrode layer 114. The second electrode layer 114 reflects all the incident red, green, and blue light. The reflected light and the light emitted by the quantum dot units excited by the reflected light pass through the quantum dot layer 120 and the color filter layer 130 in sequence. When the emitted red, green, and blue light passes through the polarizer structure 140, the polarizer structure 140 still functions, causing the transmittance of the emitted red, green, and blue light to also be reduced by about 50%, thereby reducing the reflection of natural light by the second electrode layer 114.

[0050] Therefore, the existing method of setting the polarizer structure 140 can only reduce the incident light on the second electrode layer 114 and reduce the reflection of natural light by the second electrode layer 114 to a certain extent, but it cannot effectively reduce the reflection of scattered light during photoluminescence of the quantum dot unit by the second electrode layer 114. Therefore, the display effect of the quantum dot display panel is still unsatisfactory. In addition, after setting the polarizer structure 140, when the light emitted by the quantum dot unit excited by the blue light source 110 passes through the polarizer structure 140 and exits, the polarizer structure 140 will also act, reducing the transmittance of the emitted red, green and blue light by about 50%, which inevitably brings new impacts to the display effect. Moreover, the manufacturing cost of the polarizer structure 140 is usually high, and setting the polarizer structure 140 will increase the manufacturing cost of the quantum dot display panel, thus resulting in a high manufacturing cost of the quantum dot display panel.

[0051] In view of this, embodiments of the present invention provide a display panel that, without the need to set a polarizer structure 140 as in the prior art, reduces the reflection of incident natural light and scattered light from the blue light source 110 during photoluminescence of quantum dot units, thereby improving the display effect of the display panel while ensuring that the display panel has a low manufacturing cost.

[0052] Figure 3 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention, for reference. Figure 3 The display panel includes: a blue light source 10, a color filter layer 30, a quantum dot layer 20, and a blue light filter layer 40; the color filter layer 30 is located on one side of the blue light source 10, and the color filter layer 30 includes multiple filter units, each filter unit including at least a red light filter unit 31 and a green light filter unit 32; the quantum dot layer 20 is located on the side of the color filter layer 30 close to the blue light source 10, and the quantum dot layer 20 includes quantum dot units corresponding to the filter units, each quantum dot unit including a light-transmitting unit 23, a red quantum dot unit 21 corresponding to the red light filter unit 31, and a green quantum dot unit 22 corresponding to the green light filter unit 32; the blue light filter layer 40 is located between the quantum dot layer 20 and the blue light source 10.

[0053] The blue light source 10 provides the necessary light source to the display panel. The red light filter unit 31 filters out other colors of light while allowing red light to pass through, and the green light filter unit 32 filters out other colors of light while allowing green light to pass through. The quantum dots in the red quantum dot unit 21 can absorb blue or green light and emit red light, while the quantum dots in the green quantum dot unit 22 can absorb blue light and emit green light. The light-transmitting unit 23 allows the blue light emitted by the blue light source 10 to pass through. The blue light filter layer 40 filters out other colors of light while allowing blue light to pass through. (See below for reference.) Figure 4The technical solutions of the embodiments of the present invention will be described in detail below. Figure 4 It is the light in Figure 3 A schematic diagram illustrating the propagation process within the display panel shown.

[0054] like Figure 4 As illustrated, when natural light is incident on the blue light source 10, it first passes through the color filter layer 30, resulting in the emitted light containing only red light R, green light G, blue light B, and a small amount of other colors Y. This remaining red light R, green light G, blue light B, and a small amount of other colors Y then need to pass through the blue light filter layer 40. When the remaining red light R, green light G, blue light B, and a small amount of other colors Y pass through the blue light filter layer 40, the red light R, green light G, and other colors Y are all absorbed by the blue light filter layer 40. Only a portion of the blue light B is reflected by the blue light filter layer 40, and a portion of the blue light B is transmitted through the blue light filter layer 40. The transmitted blue light B is reflected by the blue light source 10 and then emitted through the blue light filter layer 40. Therefore, in the technical solution of this embodiment of the invention, when natural light is incident on the blue light source 10, due to the setting of the blue light filter layer 40, the red, green, and blue light emitted through the color filter layer 30, as well as a small amount of other colored light, are almost entirely absorbed by the blue light filter layer 40, while only a small portion of the blue light is reflected between the blue light filter layer 40 and the quantum dot layer 20 (e.g., ...). Figure 4 The blue reflected light (b) in the quantum dot layer greatly reduces the amount of natural light that can enter the blue light source 10, preventing the blue light source 10 from reflecting a large amount of natural light and avoiding the large amount of reflected natural light from the blue light source 10 from entering the quantum dot layer 20. This reduces the reflection of the incident natural light by the blue light source 10 and improves the display effect of the display panel.

[0055] Continue to refer to Figure 4When the green quantum dot unit 22 emits light, some of its scattered light must pass through the blue light filter layer 40 before it is incident on the blue light source 10, and the green scattered light G' will be absorbed by the blue light filter layer 40 when it enters the blue light filter layer 40; when the red quantum dot unit 21 emits light, some of its scattered light must pass through the blue light filter layer 40 before it is incident on the blue light source 10, and the red scattered light R' will also be absorbed by the blue light filter layer 40 when it enters the blue light filter layer 40. Therefore, in the technical solution of this embodiment of the invention, when some of the scattered light from the quantum dot units of the quantum dot layer 20 photoluminescence is incident on the blue light source 10, the blue light filter layer 40 is set so that all the scattered light incident on the blue light source 10 is absorbed by the blue light filter layer 40. This greatly reduces the amount of scattered light that can enter the blue light source 10, thereby preventing the blue light source 10 from reflecting a large amount of scattered light and avoiding a large amount of reflected light from the blue light source 10 from incident on the quantum dot layer 20. This reduces the reflection of scattered light from the incident quantum dot units during photoluminescence by the blue light source 10, further improving the display effect of the display panel.

[0056] Meanwhile, the display panel of this embodiment does not include a polarizer structure 140, but only requires a blue light filter layer 40. That is, the blue light filter layer 40 replaces the polarizer structure 140. Compared to setting a polarizer structure 140, the material cost of setting a blue light filter layer 40 is lower, thus maintaining a lower manufacturing cost for the display panel. Furthermore, compared to setting a polarizer structure 140, setting a blue light filter layer 40 does not reduce the transmittance of the quantum dot layer 20 during photoluminescence, meaning it does not inevitably introduce new impacts on the display effect, thereby also helping to ensure a better lifespan for the display panel. Moreover, in the display panel provided by this embodiment, the color filter layer 30 only includes red light filter units 31 and green light filter units 32, meaning the number of filter units in the color filter layer 30 is smaller, resulting in less material consumption for the color filter layer 30, further reducing the manufacturing cost of the display panel. Furthermore, the display panel provided in this embodiment of the invention includes a quantum dot layer 20 and a blue light filter layer 40 as a single layer, which is advantageous for use as a large-size display panel. Using the display panel of this embodiment of the invention in a large-size display panel will have a good display effect.

[0057] Based on the above, in the embodiments of the present invention, there are various ways in which the blue light filter layer 40, the color filter layer 30 and the light-transmitting unit 23 are arranged in combination. The following are exemplary descriptions, but they are not intended to limit the present invention.

[0058] In one embodiment of the present invention, optionally, the material of the light-transmitting unit 23 includes a blue light filtering material. Specifically, the blue light filtering material is any material capable of filtering out other colors of light while transmitting blue light. By including a blue light filtering material in the material of the light-transmitting unit 23, not only is the blue light emitted from the blue light source 10 emitted from the quantum dot display panel purer, improving the display effect of the quantum dot display panel, but also, when natural light is incident on the blue light source 10, the light emitted from the quantum dot layer 20 only contains red, green, and blue light, with virtually no other colors present. This reduces the amount of natural light incident on the blue light source 10, prevents the blue light source 10 from reflecting a large amount of natural light, and further improves the display effect of the quantum dot display panel.

[0059] Figure 5 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. (Reference) Figure 5 Optionally, the light-transmitting unit 23 and the blue light filter layer 40 are integrally formed. In this way, the blue light filter layer 40, while reducing the reflection of incident natural light and scattered light by the blue light source 10, can be made of the same material as the light-transmitting unit 23. This eliminates the need to add new materials to the display panel when setting the blue light filter layer 40, allowing the display panel to maintain its original material type. Furthermore, it eliminates the need to form a separate film layer after setting the light-transmitting unit 23 to set the blue light filter layer 40, or vice versa. This results in the display panel having fewer film layers, saving on display panel manufacturing processes and facilitating production.

[0060] Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. (Reference) Figure 6 Optionally, the light filtering unit also includes a blue light filtering unit 33, which corresponds to the light transmitting unit 23. This not only makes the blue light emitted from the blue light source 10 emitted from the quantum dot display panel purer, further improving the display effect, but also ensures that when natural light is incident on the blue light source 10, the light emitted from the quantum dot layer 20 only contains red, green, and high-purity blue light. This reduces the amount of natural light incident on the blue light source 10, preventing excessive reflection of natural light by the blue light source 10, and further improving the display effect of the quantum dot display panel.

[0061] Figure 7 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. (Reference) Figure 7Optionally, the light filtering unit also includes a blue light filtering unit 33, which is integrated with the light transmitting unit 23. In this way, both the blue light filtering unit 33 and the light transmitting unit 23 can make the blue light emitted from the display panel purer and reduce the reflection of natural light by the blue light source 10, while using the same materials and forming them in the same process. This not only does not affect the original material types of the display panel but also saves on the number of film layers, ensuring a simple manufacturing process and facilitating production.

[0062] Figure 8 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. (Reference) Figure 8 Optionally, the filtering unit also includes a blue light filtering unit 33, and the blue light filtering unit 33, the light transmitting unit 23, and the blue light filtering layer 40 are integrally formed. This configuration in this embodiment of the invention not only reduces the reflection of natural light and scattered light from the blue light source 10 by the blue light filtering layer 40, but also ensures that the blue light emitted from the display panel by the blue light filtering unit 33 and the light transmitting unit 23 is purer. Furthermore, the blue light filtering unit 33, the light transmitting unit 23, and the blue light filtering layer 40 are all made of the same material. This means that while greatly improving the display effect of the display panel, it does not affect the original material type of the display panel, ensuring a lower cost for the display panel. Moreover, this configuration can be completed with only one manufacturing process, greatly saving on the number of film layers in the display panel and ensuring the simplicity of the display panel manufacturing process.

[0063] Figure 9 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. (Reference) Figure 9 In another embodiment of the present invention, optionally, the material of the light-transmitting unit 23 includes a transparent material, and the light-filtering unit further includes a blue light filter unit 33, which is disposed opposite to the light-transmitting unit 23; optionally, the thickness of the blue light filter unit 33 is 1μm to 5μm. This configuration reduces the amount of material used in the blue light filter unit 33 in the display panel, which helps control the cost of the display panel, and by controlling the thickness of the blue light filter unit 33 to 1μm to 5μm, the appropriate thickness of the blue light filter unit 33 is ensured to better improve the display effect while controlling costs.

[0064] Based on the above embodiments, in one embodiment of the present invention, optionally, the thickness of the blue light filter layer 40 is 1μm to 10μm. Specifically, if the thickness of the blue light filter layer 40 is too small, other colors of light besides blue in natural light cannot be absorbed as much, thus making it difficult to effectively reduce the reflection of natural light by the blue light source 10. If the thickness of the blue light filter layer 40 is too large, it will easily lead to material waste. Setting the thickness of the blue light filter layer 40 to 1μm can ensure that the blue light filter layer 40 can perform its function well, while also ensuring that the display panel has a low cost and reducing the overall thickness of the display panel. For example, the thickness of the blue light filter layer 40 can be set to 1μm, 2μm, 3μm, 4μm, 5μm, etc. Preferably, the thickness of the blue light filter layer 40 is set to 2μm.

[0065] Figure 10 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. (Reference) Figure 10 In the above embodiments, optionally, the blue light source 10 includes: an array substrate 11, a first electrode layer 12, a light-emitting layer 13, and a second electrode layer 14; the first electrode layer 12 is located on one side of the array substrate 11, the light-emitting layer 13 is located on the side of the first electrode layer 12 away from the array substrate 11, and the second electrode layer 14 is located between the light-emitting layer 13 and the blue light filter layer 40; the light-emitting layer 13 emits blue light under the drive of the first electrode layer 12 and the second electrode layer 14. The first electrode layer 12 can be an anode, the second electrode layer 14 can be a cathode, the material of the second electrode layer 14 can be silver (Ag) or magnesium-aluminum alloy, etc., and the material of the light-emitting layer 13 can be a light-emitting diode (LED) material or an organic light-emitting diode (OLED) material.

[0066] Continue to refer to Figure 10 Optionally, the display panel further includes a hole injection layer 51, a hole transport layer 52, an electron transport layer 53, and an electron injection layer 54. The hole injection layer 51 is located on the side of the first electrode layer 12 away from the array substrate 11, and the hole transport layer 52 is located between the hole injection layer 51 and the light-emitting layer 13. The electron transport layer 53 is located on the side of the light-emitting layer 13 away from the hole transport layer 52, and the electron injection layer 54 is located between the electron transport layer 53 and the second electrode layer 14. The hole injection layer 51 lowers the hole injection barrier from the first electrode layer 12 to the light-emitting layer 13, thus reducing the barrier for hole transport and allowing the first electrode layer 12 to effectively inject holes into the light-emitting layer 13. This reduces the operating voltage of the display panel and ensures a longer lifespan. Similarly, the electron injection layer 54 allows the second electrode layer 14 to effectively inject electrons into the light-emitting layer 13.

[0067] Continue to refer to Figure 10 Optionally, the first electrode layer 12 includes electrode units that correspond one-to-one with the filter units. Each electrode unit includes a first electrode unit 1201, a second electrode unit 1202, and a third electrode unit 1203 that correspond to the red light filter unit 31, the green light filter unit 32, and the light transmission unit 23, respectively. The array substrate 11 provides voltage to the first electrode unit 1201, the second electrode unit 1202, and the third electrode unit 1203 respectively. The first electrode unit 1201, the blue light source 10, the red quantum dot unit 21, and the red light filter unit 31 correspond to the red sub-pixels in the display panel. The second electrode unit 1202, the blue light source 10, the green quantum dot unit 22, and the green light filter unit 32 correspond to the green sub-pixels in the display panel. The third electrode unit 1203, the blue light source 10, and the light-transmitting unit 23 correspond to the blue sub-pixels in the display panel. The red, green, and blue sub-pixels share the second electrode layer 14 and the blue light filter layer 40. The red, green, and blue sub-pixels can constitute the pixels in the display panel.

[0068] This invention also provides a method for manufacturing a display panel, which can be used to manufacture the display panel in any of the above embodiments. Figure 11 This is a flowchart illustrating a method for manufacturing a display panel according to an embodiment of the present invention. (Refer to...) Figure 11 The manufacturing methods for the display panel include:

[0069] S210 provides a blue light source.

[0070] S211. A blue light filter layer is formed on one side of the blue light source.

[0071] S212. A quantum dot layer is formed on the side of the blue light filter layer away from the blue light source. The quantum dot layer includes multiple quantum dot units, and each quantum dot unit includes a light-transmitting unit, a red light quantum dot unit, and a green light quantum dot unit.

[0072] S213. A color filter layer is formed on the side of the quantum dot layer away from the blue light filter layer. The color filter layer includes filter units that correspond one-to-one with the quantum dot units. Each filter unit includes at least a red light filter unit corresponding to the red light quantum dot unit and a green light filter unit corresponding to the green light quantum dot unit.

[0073] When the filter unit also includes a blue light filter unit, a blue light filter layer can be formed through a coating process, and a color filter layer can be formed using a yellow light process, which simplifies the manufacturing process of the display panel. The manufacturing method of the display panel provided in this embodiment of the invention and the display panel itself belong to the same inventive concept and can achieve the same technical effects; therefore, repeated details are not described here.

[0074] Based on the above embodiments, optionally, step S211, forming a blue light filter layer on one side of the blue light source, includes:

[0075] An initial filter layer is formed on one side of the blue light source using a coating or vapor deposition process;

[0076] Multiple pits are formed on the initial filter layer to form blue light filter units and a blue light filter layer; wherein, the initial filter layer between the plane containing the bottom surface of the pit and the plane containing the bottom surface of the initial filter layer serves as the blue light filter layer, and the initial filter layer located between two adjacent pits and above the blue light filter layer serves as the blue light filter unit; see also Figure 8 The blue light filter unit 33, the light transmission unit 23 and the blue light filter layer 40 are integrated into one unit, which helps to simplify the process.

[0077] Step S212, forming a quantum dot layer on the side of the blue light filter layer away from the blue light source, includes: forming initial quantum dot units corresponding one-to-one with the pits in the pits, each initial quantum dot unit including a red quantum dot unit and a green quantum dot unit, the blue light filter unit serving as a light-transmitting unit, and all initial quantum dot units and all light-transmitting units constituting a quantum dot layer.

[0078] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that, include: Blue light source, color filter layer, quantum dot layer, and blue light filter layer; The color filter layer is located on one side of the blue light source, and the color filter layer includes multiple filter units, each of which includes at least a red light filter unit and a green light filter unit; The quantum dot layer is located on the side of the color filter layer closer to the blue light source. The quantum dot layer includes quantum dot units that correspond one-to-one with the filter units. Each quantum dot unit includes a light-transmitting unit, a red quantum dot unit corresponding to the red light filter unit, and a green quantum dot unit corresponding to the green light filter unit. The blue light filter layer is located between the quantum dot layer and the blue light source; The blue light filter layer is used to absorb red light, green light and other colors of light emitted through the color filter layer. At the same time, the blue light filter layer is used to transmit blue light in the natural light emitted through the color filter layer. The blue light transmitted by the blue light filter layer is reflected by the blue light source and then emitted through the blue light filter layer to the space between the blue light filter layer and the quantum dot layer. The filtering unit further includes a blue light filtering unit, which corresponds to the light-transmitting unit; The blue light filtering unit and the light transmitting unit are integrally formed; the light transmitting unit and the blue light filtering layer are integrally formed.

2. The display panel according to claim 1, characterized in that, The material of the light-transmitting unit includes blue light filter material.

3. The display panel according to claim 1, characterized in that, The material of the light-transmitting unit includes transparent materials; The filtering unit also includes a blue light filtering unit, which is disposed opposite to the light transmitting unit.

4. The display panel according to claim 3, characterized in that, The thickness of the blue light filter unit is 1 μm to 5 μm.

5. The display panel according to claim 1, characterized in that, The thickness of the blue light filter layer is 1 μm to 10 μm.

6. The display panel according to claim 1, characterized in that, The blue light source includes: an array substrate, a first electrode layer, a light-emitting layer, and a second electrode layer; The first electrode layer is located on one side of the array substrate, the light-emitting layer is located on the side of the first electrode layer away from the array substrate, and the second electrode layer is located between the light-emitting layer and the blue light filter layer; the light-emitting layer emits blue light under the drive of the first electrode layer and the second electrode layer.

7. The display panel according to claim 6, characterized in that, The display panel further includes a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer; the hole injection layer is located on the side of the first electrode layer away from the array substrate, and the hole transport layer is located between the hole injection layer and the light-emitting layer; the electron transport layer is located on the side of the light-emitting layer away from the hole transport layer, and the electron injection layer is located between the electron transport layer and the second electrode layer.

8. The display panel according to claim 6, characterized in that, The first electrode layer includes electrode units that correspond one-to-one with the filter units. Each electrode unit includes a first electrode unit, a second electrode unit, and a third electrode unit that correspond to the red light filter unit, the green light filter unit, and the light-transmitting unit, respectively.

9. A method for manufacturing a display panel, used to prepare the display panel according to any one of claims 1-8, characterized in that, include: Provides a blue light source; A blue light filter layer is formed on one side of the blue light source; A quantum dot layer is formed on the side of the blue light filter layer away from the blue light source. The quantum dot layer includes multiple quantum dot units, and each quantum dot unit includes a light-transmitting unit, a red light quantum dot unit, and a green light quantum dot unit. A color filter layer is formed on the side of the quantum dot layer away from the blue light filter layer. The color filter layer includes filter units that correspond one-to-one with the quantum dot units. Each filter unit includes at least a red light filter unit corresponding to the red light quantum dot unit and a green light filter unit corresponding to the green light quantum dot unit. The blue light filter layer is used to absorb red light, green light and other colors of light emitted through the color filter layer, and at the same time, the blue light filter layer is used to reflect the blue light emitted through the color filter layer to the space between the blue light filter layer and the quantum dot layer.

10. The method for manufacturing a display panel according to claim 9, characterized in that, Forming a blue light filter layer on one side of the blue light source includes: An initial filter layer is formed on one side of the blue light source using a coating process or a vapor deposition process; Multiple pits are formed on the initial filter layer to form a blue light filter unit and a blue light filter layer; wherein, the initial filter layer between the plane where the bottom surface of the pit is located and the plane where the bottom surface of the initial filter layer is located serves as the blue light filter layer, and the initial filter layer located between two adjacent pits and above the blue light filter layer serves as the blue light filter unit. Forming a quantum dot layer on the side of the blue light filter layer away from the blue light source includes: forming initial quantum dot units in the pits that correspond one-to-one with the pits, each initial quantum dot unit including a red quantum dot unit and a green quantum dot unit, the blue light filter unit serving as a light-transmitting unit, and all the initial quantum dot units and all the light-transmitting units constituting a quantum dot layer.

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