CN115776826A - Display panel and display device - Google Patents

Abstract

The application discloses display panel and display device belongs to and shows technical field. The display panel includes: the quantum dot structure comprises a light-emitting substrate, a first quantum dot layer and a second quantum dot layer, wherein the first quantum dot layer and the second quantum dot layer are positioned on the light-emitting side of the light-emitting substrate and are stacked along the light-emitting direction of the light-emitting substrate. The particle size of the scattering particles in the first quantum dot layer is smaller than that of the scattering particles in the second quantum dot layer, so that the scattering particles with smaller particle sizes in the first quantum dot layer can adapt to light rays with smaller wavelengths and the scattering particles with larger particle sizes in the second quantum dot layer can adapt to light rays with larger wavelengths and other colors. Like this, can guarantee that the light through first quantum dot layer and second quantum dot layer all has better scattering effect to furthest's extension light is at the propagation path of first quantum dot layer and second quantum dot layer, makes display panel's luminous efficiency higher, and then can effectual reduction display panel's consumption.

Description

Display panel and display device

technical field

The present application relates to the field of display technology, in particular to a display panel and a display device.

Background technique

With the development of display technology, the demand and application range of display devices are constantly expanding. Commonly used display devices include mobile phones, televisions, tablet computers, notebook computers, and monitors.

At present, quantum dot materials, as a new type of luminescent material, are also increasingly used in display panels in display devices. A display panel may generally include: a light-emitting substrate, and a quantum dot conversion layer located on the light-emitting side of the light-emitting substrate. Wherein, the quantum dot conversion layer is formed by solution processing, spin coating or inkjet printing of quantum dot materials, and further curing to form a film. The quantum dot conversion layer includes a plurality of red quantum dots and green quantum dots, the red quantum dots can convert the blue light emitted by the light-emitting substrate into red light, and the green quantum dots can convert the blue light emitted by the light-emitting substrate into green light.

However, the light extraction efficiency of the current display panel integrated with the quantum dot conversion layer is low, resulting in high power consumption of the display panel.

Contents of the invention

Embodiments of the present application provide a display panel and a display device. It can solve the problem of low light extraction efficiency of the display panel integrated with the quantum dot conversion layer in the prior art, and the technical solution is as follows:

In one aspect, a display panel is provided, comprising:

a light-emitting substrate, the light-emitting substrate is used to emit light of a first color;

The first quantum dot layer and the second quantum dot layer are stacked on the light emitting side of the light emitting substrate and arranged along the light emitting direction of the light emitting substrate, and both the first quantum dot layer and the second quantum dot layer are filled with : Quantum dots for converting light of the first color into light of other colors, and scattering particles for scattering light;

Wherein, the wavelength of light of the first color is smaller than the wavelength of light of other colors, and the maximum particle size of the scattering particles in the first quantum dot layer is smaller than the scattering particles in the second quantum dot layer the smallest particle size.

Optionally, at least one of the first quantum dot layer and the second quantum dot layer is filled with a variety of scattering particles with different particle sizes.

Optionally, at least one of the first quantum dot layer and the second quantum dot layer includes: a plurality of sub-quantum dot layers stacked along the light-emitting direction of the light-emitting substrate, each of the sub-quantum dot layers The particle sizes of the scattering particles are different.

Optionally, the particle size of the scattering particles in each sub-quantum dot layer increases gradually along the light-emitting direction of the light-emitting substrate.

Optionally, the display panel has: a second sub-pixel area for converting light of the first color into light of a second color, and a second sub-pixel area for converting light of the first color into a third color The third sub-pixel area of ;

The first quantum dot layer and the second quantum dot layer are both distributed in the second sub-pixel area and the third sub-pixel area;

Wherein, the wavelength of the light of the second color is smaller than the wavelength of the light of the third color, and the maximum particle size of the scattering particles in the second quantum dot layer distributed in the second sub-pixel area is less than The minimum particle size of the scattering particles in the second quantum dot layer distributed in the third sub-pixel area.

Optionally, the particle size of the scattering particles in the first quantum dot layer distributed in the second sub-pixel area is the same as the particle size of the scattering particles in the first quantum dot layer distributed in the third sub-pixel area. The particle size is the same.

Optionally, the light-emitting substrate is also used to emit light of a second color;

Both the second sub-pixel area and the third sub-pixel area are further distributed with: a third quantum dot layer located between the first quantum dot layer and the second quantum dot layer, the third The quantum dot layer is filled with quantum dots and scattering particles;

Wherein, the maximum particle size of the scattering particles in the third quantum dot layer distributed in the second sub-pixel area is smaller than the scattering particles in the third quantum dot layer distributed in the third sub-pixel area the smallest particle size.

Optionally, in the third sub-pixel area, the maximum particle size of the scattering particles in the third quantum dot layer is smaller than the minimum particle size of the scattering particles in the second quantum dot layer, and the The minimum particle size of the scattering particles in the third quantum dot layer is greater than the maximum particle size of the scattering particles in the first quantum dot layer.

Optionally, the display panel also has: a first sub-pixel area for transmitting light of the first color, and the display panel further includes: distributed in the first sub-pixel area and filled with scattering particles In the scattering layer, the particle size of the scattering particles in the scattering layer is the same as that of the scattering particles in the first quantum dot layer.

In another aspect, a display device is provided, including: a power supply component, and a display panel electrically connected to the power supply component, where the display panel is any one of the above-mentioned display panels.

The beneficial effects brought by the technical solutions provided by the embodiments of the present application at least include:

The display panel provided by the embodiment of the present application includes: a light-emitting substrate, and a first quantum dot layer and a second quantum dot layer stacked on the light-emitting side of the light-emitting substrate and along the light-emitting direction of the light-emitting substrate. Because in the light transmitted in the first quantum dot layer, the proportion of light of the first color will be greater than that of other colors, and in the light transmitted in the second quantum dot layer, the proportion of light of other colors will be greater than that of the second quantum dot layer. The proportion of light of one color, and the wavelength of light of the first color is smaller than the wavelength of light of other colors. Therefore, the particle size of the scattering particles in the first quantum dot layer can be smaller than the particle size of the scattering particles in the second quantum dot layer, so that the smaller scattering particles in the first quantum dot layer can adapt to the wavelength The light of the first color is small, and the scattering particles with larger particle diameters in the second quantum dot layer can adapt to light of other colors with larger wavelengths, so as to ensure that the scattering particles in the first quantum dot layer are sensitive to the first color. The scattering effect of light is better, and the scattering particles in the second quantum dot layer have better scattering effect on light of other colors. In this way, it can be ensured that the light passing through the first quantum dot layer and the second quantum dot layer has a better scattering effect, so as to prolong the propagation path of the light in the first quantum dot layer and the second quantum dot layer to the greatest extent, so that The light extraction efficiency of the display panel is relatively high, thereby effectively reducing the power consumption of the display panel.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic diagram of a film layer structure of a common display panel at present;

FIG. 2 is a schematic diagram of a film layer structure of a display panel provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of an energy transition mode of a quantum dot provided in an embodiment of the present application;

Fig. 4 is a schematic diagram of the relationship between the light scattering efficiency of a scattering particle and the scale number provided by the embodiment of the present application;

Fig. 5 is a schematic diagram of the film layer structure of a first quantum dot layer provided by the embodiment of the present application;

Fig. 6 is a schematic diagram of the film layer structure of another first quantum dot layer provided by the embodiment of the present application;

Fig. 7 is a schematic diagram of the film layer structure of a stacked first quantum dot layer and a second quantum dot layer provided by the embodiment of the present application;

Fig. 8 is a schematic diagram of the film layer structure of another display panel provided by the embodiment of the present application;

FIG. 9 is a schematic diagram of another film layer structure of a display panel provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

Please refer to FIG. 1 . FIG. 1 is a schematic diagram of a film layer structure of a common display panel at present. The display panel 00 may include: a light emitting substrate 01 , and a quantum dot conversion layer 02 located on the light emitting side of the light emitting substrate 01 . Here, the quantum dot conversion layer 02 is filled with quantum dots 021 and scattering particles 022 .

Wherein, the quantum dots 021 in the quantum dot conversion layer 02 are used to convert the blue light emitted by the light-emitting substrate 01 into light of other colors. The scattering particles 022 in the quantum dot conversion layer 02 are used to scatter the light passing through the quantum dot conversion layer 02 .

Here, the scattering efficiency of the scattering particles 022 is related to the scale number α, and the scattering efficiency of the scattering particles 022 exhibits a damping oscillation as the scale number α increases. The formula for calculating the scale number α is: α=2πr/λ. Wherein, r is half of the particle diameter of the scattering particle 022 , and λ is the wavelength of light received by the scattering particle 022 . Moreover, the higher the scattering efficiency of the scattering particles 022 is, the higher the scattering intensity of the light passing through the scattering particles 022 is, so that the scattering effect of the light after being scattered by the scattering particles 022 is better.

However, at present, the particle size of each scattering particle 022 in the quantum dot conversion layer 02 is the same, so that the scattering particle 022 of this particle size can only ensure a better scattering effect of light of one wavelength, and after quantum dot conversion The light of layer 02 has a wide range of wavelengths. For example, the light passing through the quantum dot conversion layer 02 may contain blue light, red light or green light. For this reason, this quantum dot conversion layer 02 has a poor scattering effect on light of other wavelengths, resulting in a shorter propagation path of light of other wavelengths in the quantum dot conversion layer 02, which in turn leads to the integration of this quantum dot conversion layer 02. The light extraction efficiency of the display panel 00 is relatively low. In this way, it is necessary to increase the power consumption to ensure the brightness of the display panel 00 , resulting in high power consumption of the display panel 00 .

Please refer to FIG. 2 . FIG. 2 is a schematic diagram of a film layer structure of a display panel provided by an embodiment of the present application. The display panel 000 may include: a light emitting substrate 100 , and a first quantum dot layer 200 and a second quantum dot layer 300 stacked on the light emitting side of the light emitting substrate 100 along the light emitting direction X of the light emitting substrate 100 .

It should be noted that, in FIG. 2 , the first quantum dot layer 200 and the second quantum dot layer 300 can be stacked on the substrate 400 first, and then the layer with the first quantum dot layer 200 and the second quantum dot layer The substrate 400 of 300 is combined with the light-emitting substrate 100 to obtain the display panel 000. In other possible implementation manners, the first quantum dot layer 200 and the second quantum dot layer 300 may also be directly formed on the light emitting side of the light emitting substrate 100 . This embodiment of the present application does not limit it.

The light-emitting substrate 100 in the display panel 000 is used to emit light of a first color.

Both the first quantum dot layer 200 and the second quantum dot layer 300 in the display panel 000 are filled with: quantum dots for converting light of the first color into light of other colors, and scattering particles for scattering the light . Here, the number of quantum dots 201 and the number of scattering particles 202 filled in the first quantum dot layer 200 are multiple, and the multiple quantum dots 201 are evenly distributed in the first quantum dot layer 200, and the multiple scattering particles 202 are also uniformly distributed in the first quantum dot layer 200. Similarly, the number of quantum dots 301 filled in the second quantum dot layer 300 and the number of scattering particles 302 are multiple, and multiple quantum dots 301 are evenly distributed in the second quantum dot layer 300, and multiple scattering particles 302 It is also uniformly distributed in the second quantum dot layer 300 .

Exemplarily, the scattering particles in the first quantum dot layer 200 and the second quantum dot layer 300 may scatter the light after receiving the light.

As shown in FIG. 3 , FIG. 3 is a schematic diagram of an energy transition mode of a quantum dot provided in an embodiment of the present application. Since the size of the quantum dots in the first quantum dot layer 200 and the second quantum dot layer 300 is close to the Bohr radius, the quantum dots have a quantum effect. In this way, after the light of the first color emitted by the light-emitting substrate 100 is absorbed by the quantum dots in the first quantum dot layer 200 and the second quantum dot layer 300, the electrons transition to the conduction band, and then part of the radiation transitions to the valence band in the form of light. band, part of which is thermally nonradiatively transitioned through surface traps. Moreover, after the quantum dots absorb the light of the first color, the wavelength of the light that radiates transition to the valence band is different from the wavelength of the light of the first color, therefore, the light of the first color can be converted into light of other colors through the quantum dots. light.

Wherein, the wavelength of light of the first color emitted by the light-emitting substrate 100 is smaller than the wavelength of light of other colors converted by the quantum dots in the first quantum dot layer 200 or the second quantum dot layer 300 . Moreover, the maximum particle size of the scattering particles 202 in the first quantum dot layer 200 is smaller than the minimum particle size of the scattering particles 302 in the second quantum dot layer 300 .

In the embodiment of the present application, the scattering efficiency of the scattering particles in the first quantum dot layer 200 and the second quantum dot layer 300 is related to the scale number α. The formula for calculating the scale number α is: α=2πr/λ. Wherein, r is half of the particle diameter of the scattering particle, and λ is the wavelength of light received by the scattering particle. For example, as shown in FIG. 4 , FIG. 4 is a relationship between the light scattering efficiency of scattering particles and the number of scales provided by the embodiment of the present application. In Fig. 4, the abscissa represents the scale number α, and the ordinate represents the scattering efficiency of the scattering particles. For this reason, the scattering efficiency of scattering particles exhibits a damping oscillation as the scale number α increases. When the scale number α ranges from 0.13 to 0.17, the scattering efficiency of the scattering particles is the highest; when the scale number α is around 0.4, the scattering efficiency of the scattering particles is relatively high.

Since the scattering efficiency of the scattering particles is higher, the intensity of the light scattered by the scattering particles is higher, so that the scattering effect of the light after being scattered by the scattering particles is better, and the light passes through the first quantum dot layer 200 and the second quantum dot layer. The wavelength of the light 300 is relatively wide, for example, the light passing through the first quantum dot layer 200 and the second quantum dot layer 300 includes both the light of the first color and the light of other colors converted by the quantum dots. Therefore, in order to ensure that the light passing through the first quantum dot layer 200 and the second quantum dot layer 300 has a good scattering effect, it is necessary to ensure that the particle size of the scattering particles 202 in the first quantum dot layer 200 is the same as that of the second quantum dot layer. The scattering particles 302 within 300 have different particle diameters.

Since the light of the first color emitted from the light-emitting substrate 100 passes through the first quantum dot layer 200, only a small part of the light of the first color emitted from the light-emitting substrate 100 will be converted into light of other colors by the quantum dots, After passing through the second quantum dot layer 300, most of the light of the first color emitted from the light-emitting substrate 100 will be converted into light of other colors by the quantum dots. Therefore, in the light transmitted in the first quantum dot layer 200, the proportion of light of the first color will be greater than that of other colors; among the light transmitted in the second quantum dot layer 300, the proportion of light of other colors Will be greater than the proportion of light of the first color.

And the wavelength of the light of the first color is smaller than the wavelength of the light of other colors. For this reason, in order to ensure that the light transmitted in the first quantum dot layer 200 is scattered by the scattering particles 202 and the scattering effect is better, it is necessary to ensure that the first quantum dot layer 200 The particle diameter of the scattering particles 202 inside is relatively small, so that the scattering particles 202 with such a small particle diameter can adapt to light of the first color with a relatively small wavelength. For example, when the range of the corresponding scale number α is calculated to be 0.13 to 0.17 or around 0.4 according to the particle size of the scattering particles 202 and the wavelength of the light of the first color, it can ensure that the scattering particles 202 are accurate to the light of the first color. The scattering effect is better.

Similarly, in order to ensure that the light transmitted in the second quantum dot layer 300 is better scattered by the scattering particles 302, it is necessary to ensure that the particle size of the scattering particles 302 in the second quantum dot layer 300 is relatively large, so that the particle size Larger scattering particles 302 can adapt to light of other colors with larger wavelengths. For example, when the corresponding scale number α is calculated to be in the range of 0.13 to 0.17 or around 0.4 according to the particle size of the scattering particles 302 and the wavelength of light of other colors, the scattering effect of the scattering particles 202 on light of other colors can be guaranteed better.

In this way, it can be ensured that the light passing through the first quantum dot layer 200 and the second quantum dot layer 300 has a good scattering effect, so as to prolong the light in the first quantum dot layer 200 and the second quantum dot layer 300 to the greatest extent. The propagation path makes the light extraction efficiency of the display panel 000 higher, thereby effectively reducing the power consumption of the display panel 000 .

To sum up, the display panel provided by the embodiment of the present application includes: a light-emitting substrate, and a first quantum dot layer and a second quantum dot layer stacked on the light-emitting side of the light-emitting substrate and arranged along the light-emitting direction of the light-emitting substrate. Because in the light transmitted in the first quantum dot layer, the proportion of light of the first color will be greater than that of other colors, and in the light transmitted in the second quantum dot layer, the proportion of light of other colors will be greater than that of the second quantum dot layer. The proportion of light of one color, and the wavelength of light of the first color is smaller than the wavelength of light of other colors. Therefore, the particle size of the scattering particles in the first quantum dot layer can be smaller than the particle size of the scattering particles in the second quantum dot layer, so that the smaller scattering particles in the first quantum dot layer can adapt to the wavelength The light of the first color is small, and the scattering particles with larger particle diameters in the second quantum dot layer can adapt to light of other colors with larger wavelengths, so as to ensure that the scattering particles in the first quantum dot layer are sensitive to the first color. The scattering effect of light is better, and the scattering particles in the second quantum dot layer have better scattering effect on light of other colors. In this way, it can be ensured that the light passing through the first quantum dot layer and the second quantum dot layer has a better scattering effect, so as to prolong the propagation path of the light in the first quantum dot layer and the second quantum dot layer to the greatest extent, so that The light extraction efficiency of the display panel is relatively high, thereby effectively reducing the power consumption of the display panel.

In the embodiment of the present application, since the light of the first color and the light of other colors both correspond to light within a certain wavelength. For example, the light of the first color here can be blue light, which corresponds to the wave band with a wavelength of 430 nm to 500 nm; when the light of other colors is green light, it corresponds to the wave band with a wavelength of 492 nm to 577 nm ; When the light of other colors is red light, it corresponds to the wavelength band between 622 nm and 760 nm. Therefore, in order to further improve the scattering effect of light passing through the first quantum dot layer 200 and/or the second quantum dot layer 300, a variety of scattering particles 202 with different particle sizes can be set in the first quantum dot layer 200, and/or Alternatively, a variety of scattering particles 302 with different particle sizes are arranged in the second quantum dot layer 300 . Among them, there are many ways to arrange scattering particles with different particle sizes in the quantum dot layer (the first quantum dot layer 200 or the second quantum dot layer 300 ). The embodiment of this application will take the following two optional implementation modes as examples for illustration:

In a first optional implementation manner, at least one of the first quantum dot layer 200 and the second quantum dot layer 300 is filled with a variety of scattering particles with different particle sizes. Taking the first quantum dot layer 200 as an example, please refer to FIG. 5 , which is a schematic diagram of a film structure of a first quantum dot layer provided in an embodiment of the present application. The first quantum dot layer 200 can be filled with a variety of scattering particles 202 with different particle sizes at the same time, and the maximum particle size of these scattering particles 202 needs to be smaller than the minimum particle size of the scattering particles 302 in the second quantum layer 300 .

In this application, the scattering particles 202 of various particle sizes filled in the first quantum dot layer 200 are used to adapt to the light of the first color, and each of the different particle sizes in the first quantum dot layer 200 The scattering particles 202 are used to adapt to light of a wavelength within the wavelength range corresponding to the light of the first color. The light rays of multiple wavelengths adapted by the scattering particles 202 of various particle sizes in the first quantum dot layer 200 belong to the light rays within the half-wave peak range of the light rays of the first color.

For example, when the wavelength band corresponding to the light of the first color is 430 nanometers to 500 nanometers, and the half-wave peak width of the light of the first color is 20 nanometers, if it is necessary to allow the first quantum dot layer 200 to have a wavelength of 460 nanometers Both the light and the light with a wavelength of 470 nanometers have a good scattering effect, it is necessary to fill the first quantum dot layer 200 with scattering particles 202a and scattering particles 202b with different particle sizes, and the particle size of the scattering particles 202a is smaller than that of the scattering particles 202b particle size. In this way, the scattering particles 202a can adapt to light with a wavelength of 460 nanometers, so that the light with a wavelength of 460 nanometers has a better scattering effect after passing through the first quantum dot layer 200; the scattering particles 202b can adapt to light with a wavelength of 470 nanometers, so that Light with a wavelength of 470 nanometers has a better scattering effect when passing through the first quantum dot layer 200 .

In a second optional implementation, at least one of the first quantum dot layer 200 and the second quantum dot layer 300 includes: a plurality of sub-quantum dot layers stacked along the light-emitting direction X of the light-emitting substrate 100, each sub-quantum dot The scattering particles in the layers differ in particle size. Taking the first quantum dot layer 200 as an example, please refer to FIG. 6 . FIG. 6 is a schematic diagram of the layer structure of another first quantum dot layer provided by the embodiment of the present application. The first quantum dot layer 200 may include: a plurality of sub-quantum dot layers 200a stacked along the light emitting direction X of the light-emitting substrate 100, and the particle diameters of the scattering particles 202 in each sub-quantum dot layer 200a are different, and among these scattering particles 202 The maximum particle size of , needs to be smaller than the minimum particle size of the scattering particles 302 in the second quantum layer 300 .

In the present application, the particle diameters of the scattering particles 202 filled in each sub-quantum dot layer 200a in the first quantum dot layer 200 may be the same, but the particle diameters of the scattering particles 202 filled in the sub-quantum dot layers 200a of different layers is different. It should be noted that the principle of the scattering particles 202 of various particle sizes filled in the multiple sub-quantum dot layers 200a is different from the multiple types of scattering particles 202 filled in the first quantum dot layer 200 in the above-mentioned first optional implementation mode. The principle of the scattering particles 202 of particle size is the same. No more details here.

Optionally, the particle size of the scattering particles in each sub-quantum dot layer may gradually increase along the light-emitting direction X of the light-emitting substrate 100 . For example, when both the first quantum dot layer 200 and the second quantum dot layer 300 include multiple sub-quantum dot layers stacked, as shown in FIG. 7, FIG. Schematic diagram of the layer structure of a quantum dot layer and a second quantum dot layer. The particle diameters of the scattering particles 202 in each sub-quantum layer 200a in the first quantum dot layer 200 gradually increase along the light-emitting direction X of the light-emitting substrate 100 . The particle diameters of the scattering particles 302 in each sub-quantum layer 300 a in the second quantum dot layer 300 gradually increase along the light-emitting direction X of the light-emitting substrate 100 . In this way, the particle size of the scattering particles in each sub-quantum dot layer of the display panel 000 gradually increases along the light emitting direction X of the light-emitting substrate 100 . In this way, in the process of preparing the display panel 000, the scattering particles with corresponding particle sizes can be sequentially mixed in the corresponding particle size in the order of the particle size of the scattering particles from large to small, and in the direction that the substrate 400 approaches the light-emitting substrate 100. In the quantum dot film layer of the display panel 100 , the difficulty of preparing the quantum dot film layer in the display panel 100 can be effectively reduced.

In the embodiment of the present application, as shown in FIG. 8 , FIG. 8 is a schematic diagram of a film layer structure of another display panel provided in the embodiment of the present application. The display panel 000 has: a second sub-pixel area 002 for converting light of a first color into light of a second color, and a third sub-pixel area 003 for converting light of the first color into a third color.

In this application, the first quantum dot layer 200 and the second quantum dot layer 300 are both distributed in the second sub-pixel area 002 and the third sub-pixel area 003 . It should be noted that, the quantum dots 201 in the first quantum dot layer 200 in the second sub-pixel region 002 can be the same as the quantum dots 301 in the second quantum dot layer 300, and these quantum dots are used to combine the first color The light is converted into light of the second color; the quantum dots 201 in the first quantum dot layer 200 in the third sub-pixel area 003 can be the same as the quantum dots 301 in the second quantum dot layer 300, and these quantum dots are used to Light of the first color is converted to light of the third color. For this reason, the quantum dots distributed in the second sub-pixel area 002 are different from the quantum dots distributed in the third sub-pixel area 003 . Here, the light of the first color may be blue light, the light of the second color may be green light, and the light of the third color may be red light. In this case, the quantum dots distributed in the second sub-pixel area 002 can be green quantum dots for converting blue light into green light, and the quantum dots distributed in the third sub-pixel area 003 can be green quantum dots for converting blue light Red quantum dots for red light.

Wherein, the wavelength of the light of the second color is smaller than the wavelength of the light of the third color, and the maximum particle size of the scattering particles 302 in the second quantum dot layer 300 distributed in the second sub-pixel area 002 is smaller than that of the third sub-pixel area The minimum particle size of the scattering particles 302 in the second quantum dot layer 300 distributed in 003. For this reason, for the scattering particles 302 in the second quantum dot layer 300, the size of the scattering particles 302 located in the second sub-pixel region 002 is relatively small, which can adapt to light of the second color with a smaller wavelength, so that the second The light of the color has a better scattering effect when passing through the second quantum dot layer 300; the scattering particles 302 located in the third sub-pixel area 003 have a larger size, which can adapt to the light of the third color with a larger wavelength, so that the second The light of the three colors has a better scattering effect when passing through the second quantum dot layer 300 .

Optionally, since the particle size of the scattering particles 202 in the first quantum dot layer 200 distributed in the second sub-pixel area 002 is mainly adapted to the light of the first color, the first quantum dot layer distributed in the third sub-pixel area 003 The particle size of the scattering particles 202 in the quantum dot layer 200 is mainly adapted to the light of the first color. Therefore, the particle size of the scattering particles 202 in the first quantum dot layer 200 distributed in the second sub-pixel area 002 can be compared with the particle size of the scattering particles 202 in the first quantum dot layer 200 distributed in the third sub-pixel area 003. same diameter.

For example, as shown in FIG. 8, when the first quantum dot layer 200 includes two layers of sub-quantum dot layers 200a stacked and the second quantum dot layer 300 is a single layer, if the scale number α needs to be controlled to 0.13 to 0.17 In the second sub-pixel region 002 and the third sub-pixel region 003, the particle size range of the scattering particles filled in the sub-quantum dot layer 200a close to the light-emitting substrate 100 in the first quantum dot layer 200 can be: 15 Nanometer to 20 nanometers; the particle size range of the scattering particles filled in the sub-quantum dot layer 200a in the first quantum dot layer 200 facing away from the light-emitting substrate 100 in the second sub-pixel area 002 and the third sub-pixel area 003 can be: 20 nanometers to 25 nanometers; the particle size range of the scattering particles filled in the second quantum dot layer 300 in the second sub-pixel area 002 can be: 25 nanometers to 30 nanometers; the second quantum dots in the third sub-pixel area 003 The particle size range of the scattering particles filled in the layer 300 may be from 30 nm to 35 nm.

It should be noted that, the above embodiments are all schematically illustrated by taking the light of the first color emitted by the light-emitting substrate 100 as an example. In other possible implementation manners, the light-emitting substrate 100 can not only emit light of the first color, but also emit light of the second color.

In this case, as shown in FIG. 9 , FIG. 9 is a schematic diagram of a film layer structure of another display panel provided by an embodiment of the present application. Both the second sub-pixel area 002 and the third sub-pixel area 003 are further distributed with: a third quantum dot layer 500 located between the first quantum dot layer 200 and the second quantum dot layer 300 . The third quantum dot layer 500 is filled with quantum dots 501 and scattering particles 502 .

Here, in the second sub-pixel region 002, the quantum dots 501 in the third quantum dot layer 500 are the same as the quantum dots 201 in the first quantum dot layer 200, and the same as the quantum dots 301 in the second quantum dot layer 300 , these quantum dots are used to convert light of the first color into light of the second color; in the third sub-pixel area 003, the quantum dots 501 in the third quantum dot layer 500 and the quantum dots in the first quantum dot layer 200 The quantum dots 201 are the same as the quantum dots 301 in the second quantum dot layer 300, and these quantum dots are used to convert the light of the first color into the light of the third color, or convert the light of the second color into Rays of third color.

In this application, in the second sub-pixel area 002, the scattering particles in the third quantum dot layer 500 and the first quantum dot layer 200 can both adapt to the light of the first color, while the scattering particles in the second quantum dot layer 300 Scattering particles are used to match the light of the second color. In the third sub-pixel area 003, the scattering particles in the first quantum dot layer 200 can adapt to the light of the first color, the scattering particles in the third sub-dot layer 500 can adapt to the light of the second color, and the second quantum dot layer 500 can adapt to the light of the second color. The scattering particles in the quantum dot layer 300 can match the light of the third color.

For this reason, the maximum particle diameter of the scattering particles 502 in the third quantum dot layer 500 distributed in the second sub-pixel area 002 is smaller than the minimum particle size of the scattering particles 502 in the third quantum dot layer 500 distributed in the third sub-pixel area 003. particle size. Moreover, in the third sub-pixel area 003, the maximum particle diameter of the scattering particles 502 in the third quantum dot layer 500 is smaller than the minimum particle diameter of the scattering particles 302 in the second quantum dot layer 300, and the third quantum dot layer The minimum particle size of the scattering particles 502 in the 500 is larger than the maximum particle size of the scattering particles 202 in the first quantum dot layer 200 . That is, in the third sub-pixel region 003 , along the light-emitting direction of the light-emitting substrate 100 , the particle diameters of the scattering particles in the three quantum dot layers gradually increase.

In the second sub-pixel area 002 , the particle diameter of the scattering particles 502 in the third quantum dot layer 500 may be the same as that of the scattering particles 202 in the first quantum dot layer 200 . In other possible implementation manners, the minimum particle size of the scattering particles 502 in the third quantum dot layer 500 may also be larger than the maximum particle size of the scattering particles 202 in the first quantum dot layer 200 . In this way, the first quantum dot layer 200 and the third quantum dot layer 300 in the second sub-pixel region 002 are equivalent to the two stacked sub-quantum dot layers 200a distributed in the first quantum dot layer 200 in the foregoing embodiment, The setting principle will not be repeated here. Moreover, in this case, in the second sub-pixel region 002 , along the light-emitting direction of the light-emitting substrate 100 , the particle diameters of the scattering particles in the three quantum dot layers gradually increase.

For example, as shown in FIG. 9, if the scale number α needs to be controlled within 0.13 to 0.17, then, in the second sub-pixel area 002, the particle size range of the scattering particles 202 in the first quantum dot layer 200 can be : 15 nanometers to 20 nanometers; the particle diameter range of the scattering particles 502 in the third quantum dot layer 500 can be: 20 nanometers to 25 nanometers; the particle diameter range of the scattering particles 302 in the second quantum dot layer 300 can be: 25 nanometers to 30 nanometers. In the third sub-pixel area 003, the particle size range of the scattering particles 202 in the first quantum dot layer 200 can be: 15 nm to 20 nm; the particle size range of the scattering particles 502 in the third quantum dot layer 500 can be : 25 nm to 30 nm; the particle size range of the scattering particles 302 in the second quantum dot layer 300 may be: 30 nm to 35 nm.

Optionally, as shown in FIG. 8 and FIG. 9 , the display panel 000 further has: a first sub-pixel region 001 for transmitting light of the first color. The display panel 000 further includes: a scattering layer 600 distributed in the first sub-pixel area 001 and filled with scattering particles 601 . It should be noted that the first quantum dot layer 200 and the second quantum dot layer 300 in the embodiment of the present application are located in both the second sub-pixel area 002 and the third sub-pixel area 003, while the first sub-pixel area There is no quantum dot layer distributed in 001, but only the scattering layer 600 is distributed.

Here, the scattering particles 601 in the scattering layer 600 are used to adapt to the light of the first color, so that the light of the first color has a better scattering effect when passing through the scattering layer 600 . For this reason, the scattering particles 601 in the scattering layer 600 may have the same particle diameter as the scattering particles 202 in the first quantum dot layer 200 .

In the embodiment of the present application, as shown in FIG. 8 and FIG. 9 , the display panel 000 may further include: a black matrix 700 located between two adjacent sub-pixel regions. The probability of cross-color phenomenon in the display panel can be reduced by the black matrix 700 .

Optionally, as shown in FIG. 8 and FIG. 9 , the display panel 000 may further include: a color resist layer. For example, the color resistance layer may include: a first color resistance block 801 located in the first sub-pixel area 001, a second color resistance block 802 located in the second sub-pixel area 002, and a second color resistance block 802 located in the third sub-pixel area 003 The third color resistance block 803. Wherein, in the first sub-pixel area 001, the first color-resisting block 801 is arranged on the side of the scattering layer 600 away from the light-emitting substrate 100, and the first color-resisting block 801 is used to filter the light except the light of the first color. , so that only light of the first color in the display panel 000 can exit from the first sub-pixel area 001; in the second sub-pixel area 002, the second color resistance block 802 is arranged on the second quantum dot layer 300 away from the light-emitting substrate 100 On one side of the second color-resisting block 802 is used to filter the light except the light of the second color, so that only the light of the second color in the display panel 000 can exit from the second sub-pixel area 002; In the sub-pixel area 003, the third color-resisting block 803 is arranged on the side of the second quantum dot layer 300 away from the light-emitting substrate 100, and the third color-resisting block 803 is used to filter the light except the light of the third color, so that Only light of the third color in the display panel 000 can exit from the third sub-pixel region 003 .

In this application, the light-emitting substrate 100 in the display panel 000 may include: an Organic Light-Emitting Diode (OLED, Organic Light-Emitting Diode) substrate, or the light-emitting substrate 100 may include: a liquid crystal display with a backlight. Here, the OLED substrate can directly emit light of the first color, or a mixed light composed of light of the first color and light of the second color; the backlight can also directly emit light of the first color, or light of the first color Mixed light with light of the second color.

Optionally, the scattering particles in the above embodiments may be particles made of titanium dioxide or silicon dioxide.

To sum up, the display panel provided by the embodiment of the present application includes: a light-emitting substrate, and a first quantum dot layer and a second quantum dot layer stacked on the light-emitting side of the light-emitting substrate and arranged along the light-emitting direction of the light-emitting substrate. Because in the light transmitted in the first quantum dot layer, the proportion of light of the first color will be greater than that of other colors, and in the light transmitted in the second quantum dot layer, the proportion of light of other colors will be greater than that of the second quantum dot layer. The proportion of light of one color, and the wavelength of light of the first color is smaller than the wavelength of light of other colors. Therefore, the particle size of the scattering particles in the first quantum dot layer can be smaller than the particle size of the scattering particles in the second quantum dot layer, so that the smaller scattering particles in the first quantum dot layer can adapt to the wavelength The light of the first color is small, and the scattering particles with larger particle diameters in the second quantum dot layer can adapt to light of other colors with larger wavelengths, so as to ensure that the scattering particles in the first quantum dot layer are sensitive to the first color. The scattering effect of light is better, and the scattering particles in the second quantum dot layer have better scattering effect on light of other colors. In this way, it can be ensured that the light passing through the first quantum dot layer and the second quantum dot layer has a better scattering effect, so as to prolong the propagation path of the light in the first quantum dot layer and the second quantum dot layer to the greatest extent, so that The light extraction efficiency of the display panel is relatively high, thereby effectively reducing the power consumption of the display panel.

The embodiment of the present application also provides a display device, which may be any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, and a navigator. The display device may include: a power supply component, and a display panel electrically connected to the power supply component. The display panel may be the display panel in the above embodiments. For example, the display panel may be the display panel shown in FIG. 2 , FIG. 8 or FIG. 9 .

It should be noted that in the drawings, the dimensions of layers and regions may be exaggerated for clarity of illustration. Also it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or intervening layers may be present. Further, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element, or one or more intervening layers or elements may be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or one or more intervening layers may also be present. or components. Like reference numerals designate like elements throughout.

In the present application, the terms "first" and "second" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. The term "plurality" means two or more, unless otherwise clearly defined.

The above descriptions are only optional embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the scope of the application. within the scope of protection.

Claims (10)

1. A display panel, characterized in that, comprising: a light-emitting substrate, the light-emitting substrate is used to emit light of a first color; The first quantum dot layer and the second quantum dot layer are stacked on the light emitting side of the light emitting substrate and arranged along the light emitting direction of the light emitting substrate, and both the first quantum dot layer and the second quantum dot layer are filled with : Quantum dots for converting light of the first color into light of other colors, and scattering particles for scattering light; Wherein, the wavelength of light of the first color is smaller than the wavelength of light of other colors, and the maximum particle size of the scattering particles in the first quantum dot layer is smaller than the scattering particles in the second quantum dot layer the smallest particle size. 2. The display panel according to claim 1, wherein at least one of the first quantum dot layer and the second quantum dot layer is filled with a plurality of scattering particles with different particle sizes. 3. The display panel according to claim 1, wherein at least one of the first quantum dot layer and the second quantum dot layer comprises: a plurality of layers stacked along the light-emitting direction of the light-emitting substrate. There are four sub-quantum dot layers, and the particle diameters of the scattering particles in each of the sub-quantum dot layers are different. 4 . The display panel according to claim 3 , wherein the particle size of the scattering particles in each sub-quantum dot layer increases gradually along the light-emitting direction of the light-emitting substrate. 5. The display panel according to any one of claims 1 to 4, characterized in that the display panel has: a second sub-pixel area for converting light of the first color into light of a second color, and a third sub-pixel area for converting light of the first color into a third color; The first quantum dot layer and the second quantum dot layer are both distributed in the second sub-pixel area and the third sub-pixel area; Wherein, the wavelength of the light of the second color is smaller than the wavelength of the light of the third color, and the maximum particle size of the scattering particles in the second quantum dot layer distributed in the second sub-pixel area is less than The minimum particle size of the scattering particles in the second quantum dot layer distributed in the third sub-pixel area. 6. The display panel according to claim 5, wherein the particle size of the scattering particles in the first quantum dot layer distributed in the second sub-pixel area is the same as that in the third sub-pixel area The particle diameters of the scattering particles distributed in the first quantum dot layer are the same. 7. The display panel according to claim 5, wherein the light-emitting substrate is also used to emit light of a second color; Both the second sub-pixel area and the third sub-pixel area are further distributed with: a third quantum dot layer located between the first quantum dot layer and the second quantum dot layer, the third The quantum dot layer is filled with quantum dots and scattering particles; Wherein, the maximum particle size of the scattering particles in the third quantum dot layer distributed in the second sub-pixel area is smaller than the scattering particles in the third quantum dot layer distributed in the third sub-pixel area the smallest particle size. 8. The display panel according to claim 7, wherein in the third sub-pixel region, the maximum particle diameter of the scattering particles in the third quantum dot layer is smaller than that of the second quantum dot layer The minimum particle size of the scattering particles in the third quantum dot layer, and the minimum particle size of the scattering particles in the third quantum dot layer is greater than the maximum particle size of the scattering particles in the first quantum dot layer. 9. The display panel according to any one of claims 6 to 8, wherein the display panel further has: a first sub-pixel area for transmitting the light of the first color, and the display panel further comprises: The scattering layer distributed in the first sub-pixel area and filled with scattering particles, the particle size of the scattering particles in the scattering layer is the same as the particle size of the scattering particles in the first quantum dot layer. 10. A display device, characterized by comprising: a power supply component, and a display panel electrically connected to the power supply component, the display panel being the display panel according to any one of claims 1-9.

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