Display panel and display device

Abstract

The present application discloses a display panel and a display device, relating to the technical field of displays. It includes a first substrate, a first reflective layer, and a light filtering layer stacked in sequence. The light filtering layer includes a plurality of color resistors and a black matrix arranged in the same layer; it further includes a dimming layer, a first protective layer, and a second protective layer. The dimming layer is disposed on the light filtering layer, the first protective layer is located on the side of the dimming layer away from the light filtering layer, and the second protective layer is located between the dimming layer and the light filtering layer; the dimming layer includes a plurality of magnetic walls, a liquid solute, and magnetic particles arranged in the same layer. The plurality of magnetic walls respectively correspond to the black matrix, a gap is provided between two adjacent magnetic walls, the liquid solute and the magnetic particles are disposed in the gap, and the magnetic walls control the magnetic field in the gap to control the movement of the magnetic particles in the liquid solute. Through the above design, it is thus possible to prevent all the magnetic particles from accumulating on one side, improving the light transmittance and contrast of the display panel and enhancing the display effect of the picture.

Description

Technical Field

[0001] This application relates to the field of display technologies, and in particular, to a display panel and a display device. Background Art

[0002] With the development of technology, people's quality requirements for display devices are getting higher and higher. Among them, display devices mainly include emissive image display devices and reflective image display devices. Emissive image display devices provide backlight through a backlight source for image display, while reflective image display devices rely on external light to be reflected within the display panel for image display.

[0003] In traditional reflective image display devices, the movement of black charged particles is controlled by two opposed electrodes above and below. When image display is required, the black charged particles accumulate on one side of the lower electrode, and external light can then pass through the display panel. However, such a solution results in a relatively low light transmittance of the display panel, reducing the contrast of the display panel. Summary of the Invention

[0004] The purpose of this application is to provide a display panel and a display device, which can improve the light transmittance of the display panel, enhance the contrast of the display panel, and improve the display effect of the display panel.

[0005] This application discloses a display panel. The display panel includes a first substrate, a first reflective layer, and a filter layer stacked in sequence. The filter layer includes a plurality of color resistors and a plurality of black matrices arranged in the same layer. The plurality of black matrices are respectively disposed between two adjacent color resistors; the display panel further includes a dimming layer, a first protective layer, and a second protective layer. The dimming layer is disposed on the filter layer. The first protective layer is located on the side of the dimming layer away from the filter layer, and the second protective layer is located between the dimming layer and the filter layer; the dimming layer includes a plurality of magnetic walls, a liquid solute, and magnetic particles. The magnetic walls, the liquid solute, and the magnetic particles are arranged in the same layer. The plurality of magnetic walls respectively correspond to the black matrices. There is a gap between two adjacent magnetic walls. The liquid solute and the magnetic particles are disposed in the gap. The magnetic walls control the magnetic field in the gap to control the movement of the magnetic particles in the liquid solute.

[0006] Optionally, the display panel further includes a light condensing layer. The light condensing layer is disposed on the side of the first protective layer away from the first substrate, and the side of the light condensing layer away from the first protective layer includes a plurality of arc-shaped protrusions. The plurality of arc-shaped protrusions respectively correspond to the plurality of color resistors.

[0007] Optionally, the display panel further includes a second reflective layer. The second reflective layer is disposed between the magnetic wall and the corresponding liquid solute, and the reflective surface of the second reflective layer faces the adjacent liquid solute.

[0008] Optionally, taking the extending direction of the scanning lines of the display panel as the first direction, the sum of the thickness of the magnetic wall along the first direction and the thickness of the second reflective layer along the first direction is less than the thickness of the black matrix along the first direction.

[0009] Optionally, a plurality of micro-grooves are provided on the reflective surface of the second reflective layer, and the shape of the micro-grooves matches the shape of the magnetic particles.

[0010] Optionally, the direction of the first substrate facing the first reflective layer is the second direction, and along the second direction, the thickness of the light modulation layer is 10-20 micrometers.

[0011] Optionally, the display panel further includes a photoluminescent layer, and the photoluminescent layer is provided between the light filtering layer and the first reflective layer.

[0012] The present application also discloses a display device, which includes a backlight module, a second substrate, an active switch layer, a liquid crystal layer, and the display panel as described above. The second substrate, the active switch layer, the liquid crystal layer, and the display panel are stacked in sequence, and the backlight module is disposed on a side of the second substrate away from the active switch layer, and the backlight module is used to provide backlight.

[0013] Optionally, the display device further includes a light sensor and a circuit board. The backlight source is electrically connected to the circuit board. The backlight module further includes a backlight source. The light sensor is electrically connected to the circuit board. The active switch layer is electrically connected to the circuit board. The magnetic wall is electrically connected to the circuit board.

[0014] Optionally, the first reflective layer includes an electrochromic layer and an electrode. The electrode is connected to the light sensor, and the electrode is disposed on the surface of the electrochromic layer to control the light transmittance of the electrochromic layer.

[0015] Compared with the solution of the traditional reflective image display device, in the present application, the magnetic wall and the magnetic particles are arranged on the same layer, and the magnetic wall is disposed on the left and right sides of the magnetic particles, preventing all the magnetic particles from accumulating on one side, resulting in an enlarged light-shielding area, and also preventing all the magnetic particles from accumulating on the side close to the light filtering layer, causing secondary light blocking, thereby improving the light transmittance and contrast of the display panel. Description of the Drawings

[0016] The accompanying drawings included are used to provide a further understanding of the embodiments of the present application, which form a part of the specification, illustrate the implementation manners of the present application, and explain the principles of the present application together with the written description. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0017] Figure 1 is a schematic diagram of a display device according to an embodiment of the present application;

[0018] Figure 2 is a schematic diagram of a display panel according to an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of a display panel including a photoluminescent layer according to an embodiment of the present application;

[0020] Figure 4 is a top view schematic diagram of a magnetic wall according to an embodiment of the present application;

[0021] Figure 5 is an enlarged schematic diagram of a second reflective layer according to an embodiment of the present application;

[0022] Figure 6 is a schematic diagram of a display device including a photosensor according to an embodiment of the present application;

[0023] Figure 7 is an enlarged schematic diagram of a first reflective layer according to an embodiment of the present application.

[0024] Among them, 10, display device; 20, backlight module; 21, backlight source; 30, circuit board; 40, photosensor; 500, display panel; 510, first substrate; 520, first reflective layer; 521, electrochromic layer; 522, electrode; 530, photoluminescent layer; 540, filter layer; 541, color resistor; 542, black matrix; 550, second protective layer; 560, dimming layer; 561, magnetic wall; 562, liquid solute; 563, magnetic particles; 564, second reflective layer; 565, micro-groove; 570, first protective layer; 580, light condensing layer; 591, scanning electrode trace; 592, data electrode trace; 600, second substrate; 610, active switch layer; 620, liquid crystal layer. Detailed implementation manners

[0025] It should be understood that the terms, specific structures and functional details used herein are only for describing specific embodiments and are representative. However, the present application can be specifically implemented in many alternative forms and should not be construed as being limited only to the embodiments described herein.

[0026] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating relative importance or implicitly indicating the quantity of the indicated technical features. Thus, unless otherwise stated, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features; the meaning of "a plurality" is two or more. The term "comprising" and any variations thereof mean inclusive inclusion, and there may be or be added one or more other features, integers, steps, operations, units, components, and / or combinations thereof.

[0027] In addition, terms indicating orientation or positional relationships such as "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are described based on the orientation or relative positional relationship shown in the drawings, and are only for the convenience of describing the present application in a simplified manner, rather than indicating that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present application.

[0028] Furthermore, unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0029] The present application will be described in detail below with reference to the drawings and optional embodiments.

[0030] Figure 1 is a schematic diagram of a display device according to an embodiment of the present application, as Figure 1 shown. The direction indicated by the arrow in the figure is the propagation direction of light. The present application discloses a display device 10, and the display device 10 includes a backlight module 20, a second substrate 600, an active switch layer 610, a liquid crystal layer 620, and a display panel 500. The second substrate 600, the active switch layer 610, the liquid crystal layer 620, and the display panel 500 are stacked in sequence, and the backlight module 20 is disposed on a side of the second substrate 600 away from the active switch layer 610, and the backlight module 20 is used to provide backlight.

[0031] Among them, the backlight module 20 may adopt a side - entry type backlight module 20 or a direct - lit type backlight module 20, which is not limited herein.

[0032] The display panel 500 is a reflective display panel 500, that is, when the external environment is relatively bright, the display panel 500 can display images without structures such as the backlight module 20, the second substrate 600, the active switch layer 610, and the liquid crystal layer 620.

[0033] This application combines two types of image display devices, namely the emissive image display device 10 and the reflective image display device 10. Therefore, compared with the traditional LCD (Liquid Crystal Display), the display device 10 described in this application can display images without turning on the light source in the backlight module 20 when the external environment is relatively bright, which is more energy-efficient. Moreover, when the external environment is relatively dark, the display panel 500 can cooperate with the light source in the backlight module 20 to display images, improving the brightness and contrast of the images and enhancing the display effect.

[0034] This application also discloses a display panel 500 and has improved the display panel 500, which can be used in the display device 10 described above. The specific design of the display panel 500 of this application is as follows:

[0035] Figure 2 is a schematic diagram of a display panel according to an embodiment of this application. As Figure 2 shown, the direction indicated by the arrow in the figure is the propagation direction of light. The display panel 500 includes a first substrate 510, a first reflective layer 520, and a filter layer 540 stacked in sequence. The filter layer 540 includes a plurality of color resistors 541 and a plurality of black matrices 542 arranged in the same layer, and the plurality of black matrices 542 are respectively arranged between two adjacent color resistors 541.

[0036] The display panel 500 further includes a dimming layer 560, a first protective layer 570, and a second protective layer 550. The dimming layer 560 is disposed on the filter layer 540, the first protective layer 570 is located on the side of the dimming layer 560 away from the filter layer 540, and the second protective layer 550 is located between the dimming layer 560 and the filter layer 540. The dimming layer 560 is used to adjust the amount of ambient light passing through the dimming layer 560 and propagating to the first reflective layer 520.

[0037] The specific structure of the dimming layer 560 is as follows: The dimming layer 560 includes a plurality of magnetic walls 561, a liquid solute 562, and magnetic particles 563, which are arranged in the same layer. The plurality of magnetic walls 561 respectively correspond to the black matrices 542, and there is a gap between two adjacent magnetic walls 561. The liquid solute 562 and the magnetic particles 563 are disposed in the gap. The magnetic walls 561 control the magnetic field in the gap, thereby controlling the movement of the magnetic particles 563 in the liquid solute 562.

[0038] When the magnetic wall 561 is not powered on, the magnetic wall 561 has magnetism, and the magnetic particles 563 are attached to the magnetic wall 561. By applying electricity to the magnetic wall 561, the magnetic field in the gap is changed. When light shines on the magnetic particles 563, it will be absorbed by the magnetic particles 563, thereby reducing the light incident on the display panel. Therefore, by controlling the distribution of the magnetic particles 563 in the liquid solute 562, the amount of ambient light passing through the light-dimming layer 560 can be controlled, thereby realizing the display of the picture.

[0039] The first protective layer 570 includes a passivation layer and / or an insulating layer, and the second protective layer 550 includes a passivation layer and an insulating layer, which are used to prevent external impurities from entering the liquid solute 562, resulting in problems that hinder the movement of the magnetic particles 563, and can also ensure the purity of the liquid solute 562 and prevent the light transmittance of the liquid solute 562 from decreasing. The first reflective layer 520 includes a one-way transparent glass with a reflective effect on one side and light transmissivity on the other side.

[0040] In the traditional reflective image display device 10, when the picture is displayed, black particles will accumulate on one side of the lower electrode, resulting in more light being absorbed by the black charged particles here. Moreover, after being reflected by the reflective layer, there is still light absorbed by the black charged particles, which is equivalent to causing twice the light loss, greatly reducing the picture brightness and resulting in a decrease in contrast. In this application, the magnetic wall 561 and the magnetic particles 563 are arranged in the same layer, that is, the magnetic wall 561 is arranged on the left and right sides of the magnetic particles 563, preventing unilateral accumulation and the situation of accumulation on the upper and lower sides, and improving the light transmittance of the display panel 500.

[0041] Taking the direction of the first substrate 510 facing the first reflective layer 520 as the second direction, along the second direction, the thickness of the light-dimming layer 560 is 10-20 microns. Preferably, the thickness of the light-dimming layer 560 is 15 microns. According to the experimental results, too thick a light-dimming layer 560 will cause excessive loss of light when passing through the light-dimming layer 560, while too thin a light-dimming layer 560 will be unfavorable for the movement of the magnetic particles 563 in the liquid solute 562. Setting the thickness of the light-dimming layer 560 at 15 microns can both avoid excessive loss of light and prevent the situation where the magnetic particles 563 cannot move normally in the liquid solute 562.

[0042] To further improve the screen brightness, the present application further provides a light condensing layer 580 on the side of the first protective layer 570 facing away from the light modulating layer 560. The light condensing layer 580 is used to increase the light entering the light modulating layer 560. The specific structure of the light condensing layer 560: The light condensing layer 580 is provided on the side of the first protective layer 570 away from the first substrate 510, and the side of the light condensing layer 580 facing away from the first protective layer 570 includes a plurality of arc-shaped protrusions, and the plurality of arc-shaped protrusions are respectively arranged in one-to-one correspondence with the plurality of color resistors 541. That is, one arc-shaped protrusion is arranged above a corresponding color resistor 541.

[0043] The arc-shaped protrusion is equivalent to expanding the light incident area of a single color resistor 541, thereby increasing the amount of light entering the area corresponding to a single color resistor 541, and further improving the brightness and contrast of the display panel 500.

[0044] Moreover, the arc-shaped protrusion can also expand the refraction angle of the light, making the light emitted by the display panel 500 more dispersed, thereby expanding the viewing angle of the display panel 500 and avoiding the problem that the display panel 500 cannot be normally displayed at a large viewing angle.

[0045] To prevent the light from being absorbed by the magnetic wall 561 after entering the light modulating layer 560, causing a large amount of light loss, the present application further adds a second reflective layer 564. Specifically, the second reflective layer 564 is provided between the magnetic wall 561 and the corresponding liquid solute 562, that is, the second reflective layer 564 is provided on both sides of the magnetic wall 561, and the reflective surface of the second reflective layer 564 faces the adjacent liquid solute 562.

[0046] So that the light entering the gap between the adjacent two magnetic walls 561 is reflected on the second reflective layer 564, improving the light utilization rate.

[0047] And, to prevent the magnetic wall 561 and the second reflective layer 564 from blocking the propagation of light, the magnetic wall 561 and the second reflective layer 564 of the present application correspond to the black matrix 542, and taking the extension direction of the scan line of the display panel 500 as the first direction, the sum of the thickness of the magnetic wall 561 along the first direction and the thickness of the second reflective layer 564 along the first direction is less than the thickness of the black matrix 542 along the first direction.

[0048] That is, the projection of the black matrix 542 on the first reflective layer 520 covers the projections of the magnetic wall 561 and the second reflective layer 564 on the first reflective layer 520.

[0049] Since second reflection layers 564 are provided on both sides of the magnetic wall 561, specifically, the sum of the thickness of the magnetic wall 561 in the first direction and twice the thickness of the second reflection layer 564 in the first direction is also less than the thickness of the black matrix 542 in the first direction.

[0050] As Figure 3 shown, the direction indicated by the arrow in the figure is the propagation direction of light. The present application also adds a photoluminescent layer 530 to the display panel 500. When the photoluminescent layer 530 is irradiated with light, it will be excited to emit light, thereby improving the brightness of the display panel 500. The photoluminescent layer 530 of the present application is provided between the filter layer 540 and the first reflection layer 520.

[0051] When there is less ambient light entering the display panel 500, even if a small amount of light passes through the dimming layer 560 and the filter layer 540, it can excite the photoluminescent layer 530 to emit light. A part of the light emitted by the photoluminescent layer 530 directly passes through the filter layer 540 for image display, and the other part acts on the photoluminescent layer 530 again through the reflection of the first reflection layer 520, causing the photoluminescent layer 530 to fully enter the light-emitting state, and more light will pass through the filter layer 540 for image display.

[0052] As Figure 4 shown, Figure 4 only shows the relationship between the magnetic wall 561, the scan electrode trace 591 and the data electrode trace 592. Specifically, the display panel 500 further includes a scan electrode trace 591 and a data electrode trace 592. The scan electrode trace 591 and the data electrode trace 592 are arranged in a criss-cross pattern to form a plurality of rectangular areas, and the plurality of rectangular areas correspond to the plurality of color resistors 541 one by one. The projection of the black matrix 542 on the first reflection layer 520 covers the projections of the scan electrode trace 591 and the data electrode trace 592 on the first reflection layer 520, and the projection of the magnetic wall 561 on the first reflection layer 520 corresponds to the projection of the data electrode trace 592 on the first reflection layer 520.

[0053] The scan electrode trace 591 is connected to the magnetic wall 561 through a via, and the data electrode trace 592 is connected to the magnetic wall 561 through a via; both the scan electrode trace 591 and the data electrode trace 592 are connected to the circuit board 30, and the display data is output through the circuit board 30 to control the magnetic wall 561, and the magnetic wall 561 controls the movement of the magnetic particles 563.

[0054] Figure 5 is an enlarged schematic diagram of a second reflection layer according to an embodiment of the present application. As Figure 5As shown, in order to further improve the aperture ratio of the display panel 500 of the present application, a plurality of micro-grooves 565 for accommodating the magnetic particles 563 are provided on the second reflective layer 564. Specifically, the plurality of micro-grooves 565 are provided on the reflective surface of the second reflective layer 564, and the shape of the micro-grooves 565 matches the shape of the magnetic particles 563.

[0055] When the external ambient light is relatively dim, the backlight module 20 of the display device 10 operates to provide a light source for the display panel 500. The magnetic particles 563 fall into the micro-grooves 565. At this time, the projection of the black matrix 542 on the first reflective layer 520 covers the projection of the magnetic particles 563 on the first reflective layer 520, so as not to affect the light source in the backlight module 20 from penetrating the dimming layer 560.

[0056] Figure 6 It is a schematic diagram of a display device including a light sensor according to an embodiment of the present application, in combination with Figure 1 、 Figure 2 and Figure 6 As shown, the display device 10 further includes a light sensor 40 and a circuit board 30. The light source in the backlight module 20 is emitted by a backlight 21, and the backlight 21 is electrically connected to the circuit board 30.

[0057] The light sensor 40 is electrically connected to the circuit board 30. The light sensor 40 is provided on the display device 10 for detecting the brightness of the external ambient light. The active switch layer 610 is electrically connected to the circuit board 30, and the magnetic wall 561 is electrically connected to the circuit board 30.

[0058] When the light sensor 40 detects that the brightness of the ambient light is relatively high, the magnetic wall 561 is activated to operate through the circuit board 30, and the backlight module 20 and the active switch layer 610 do not operate, and only reflective display is performed through the reflection of external light. When the light sensor 40 detects that the brightness of the ambient light is relatively low, the magnetic wall 561 does not operate, and the magnetic wall 561 adsorbs the magnetic particles 563 into the micro-grooves 565. The optical sensor activates the active switch layer and the backlight 21 to operate through the circuit board 30 for picture display. When the optical sensor detects that the ambient light is in a relatively dim state, if only external light is used for reflective display at this time, the brightness of the display panel 500 will be relatively low, which is not conducive to viewing. Then the light sensor 40 controls the active switch layer 610, the backlight 21 and the magnetic wall 561 to operate together through the circuit board 30. The backlight 21 is mainly used to supplement light. In this mode, the display method of the display device 10 is more energy-saving.

[0059] As Figure 7As shown, when the backlight 21 is in the working state, since the light transmittance of the side of the first reflective layer 520 facing the backlight 21 is relatively low. Therefore, in this application, the first reflective layer 520 can also be prepared by an electrochromic layer 521. Specifically, the first reflective layer 520 includes an electrochromic layer 521 and an electrode 522. The electrode 522 is disposed on the surface of the electrochromic layer 521, and the electrode 522 is located between the electrochromic layer 521 and the first substrate 510. Of course, the electrode 522 can also be disposed between the electrochromic layer 521 and the photoluminescent layer 530. The electrode 522 controls the reflectivity of the electrochromic layer 521, and the electrode 522 is connected to the optical sensor 40.

[0060] The electrochromic layer 521 is composed of an electrochromic material. When the optical sensor 40 detects that the brightness of the ambient light is relatively low, the magnetic wall 561 does not work, and the magnetic wall 561 adsorbs the magnetic particles 563 into the micro-groove 565. The optical sensor activates the active switch layer and the backlight 21 to work through the circuit board 30. At this time, the electrode 522 does not work, the electrochromic layer 521 is in a transparent state, the light transmittance of the first reflective layer 520 is relatively high, and the reflectivity is relatively low.

[0061] When the optical sensor 40 detects that the brightness of the external light is relatively high, the magnetic wall 561 is activated to work through the circuit board 30, and the electrode 522 is controlled to energize the electrochromic layer 521. The electrochromic layer 521 changes from a transparent state to an opaque state, increasing the reflectivity of the first reflective layer 520; and the backlight module 20 and the active switch layer 610 do not work, and only reflection display is performed through the reflection of external light.

[0062] It should be noted that the inventive concept of this application can form a very large number of embodiments. However, due to the limited space of the application documents, it is impossible to list them all. Therefore, on the premise of no conflict, the above-described embodiments or technical features can be combined arbitrarily to form new embodiments. After the combination of each embodiment or technical feature, the original technical effect will be enhanced.

[0063] The above content is a further detailed description of this application in combination with specific optional embodiments. It cannot be determined that the specific implementation of this application is only limited to these descriptions. For those of ordinary skill in the technical field to which this application belongs, without departing from the concept of this application, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of this application.

Claims

1. A display device, characterized in that, the display device includes a backlight module, a second substrate, an active switch layer, a liquid crystal layer, and a display panel. The second substrate, the active switch layer, the liquid crystal layer, and the display panel are stacked in sequence. The backlight module is disposed on a side of the second substrate away from the active switch layer, and the backlight module is used to provide backlight; the display panel includes a first substrate, a first reflective layer, and a light filtering layer stacked in sequence. The light filtering layer includes a plurality of color resistors and a plurality of black matrices disposed in the same layer. The plurality of black matrices are respectively disposed between two adjacent color resistors; the display panel further includes a light dimming layer, a first protective layer, and a second protective layer. The light dimming layer is disposed on the light filtering layer. The first protective layer is located on a side of the light dimming layer away from the light filtering layer, and the second protective layer is located between the light dimming layer and the light filtering layer; the light dimming layer includes a plurality of magnetic walls, a liquid solute, and magnetic particles. The magnetic walls, the liquid solute, and the magnetic particles are disposed in the same layer. The plurality of magnetic walls respectively correspond to the black matrices. A gap is disposed between two adjacent magnetic walls. The liquid solute and the magnetic particles are disposed in the gap. The magnetic walls control the magnetic field in the gap and control the movement of the magnetic particles in the liquid solute; the display device further includes a light sensor. The first reflective layer includes an electrochromic layer and an electrode. The electrode is used to connect to the light sensor. The electrode is disposed on the surface of the electrochromic layer and is used to control the light transmittance of the electrochromic layer.

2. The display device according to claim 1, characterized in that, the display panel further includes a light condensing layer. The light condensing layer is disposed on a side of the first protective layer away from the first substrate, and a side of the light condensing layer away from the first protective layer includes a plurality of arc-shaped protrusions. The plurality of arc-shaped protrusions respectively correspond to the plurality of color resistors.

3. The display device according to claim 1, characterized in that, the display panel further includes a second reflective layer. The second reflective layer is disposed between the magnetic wall and the corresponding liquid solute, and a reflective surface of the second reflective layer faces the adjacent liquid solute.

4. The display device according to claim 3, characterized in that, taking the extension direction of the scan line of the display panel as the first direction, the sum of the thickness of the magnetic wall along the first direction and the thickness of the second reflective layer along the first direction is less than the thickness of the black matrix along the first direction.

5. The display device according to claim 3, characterized in that, a plurality of micro-grooves are disposed on the reflective surface of the second reflective layer, and the shape of the micro-grooves matches the shape of the magnetic particles.

6. The display device according to claim 1, characterized in that, the direction of the first substrate facing the first reflective layer is the second direction. Along the second direction, the thickness of the light dimming layer is 10 - 20 micrometers.

7. The display device according to claim 1, characterized in that, The display panel further includes a photoluminescent layer, and the photoluminescent layer is disposed between the filter layer and the first reflective layer.

8. The display device according to claim 1, wherein, the display device further includes a circuit board, the optical sensor is electrically connected to the circuit board, the backlight module further includes a backlight, the backlight is electrically connected to the circuit board, the active switch layer is electrically connected to the circuit board, and the magnetic wall is electrically connected to the circuit board.

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