CN111045245A

CN111045245A - Light controller, display panel and display device

Info

Publication number: CN111045245A
Application number: CN202010001484.7A
Authority: CN
Inventors: 田雪雁; 刘政
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2020-01-02
Filing date: 2020-01-02
Publication date: 2020-04-21

Abstract

One or more embodiments of the present disclosure provide a light controller, a display panel and a display device. The light controller is arranged on the light emitting side of the display panel and used for enabling output light on the light emitting side to be transmitted in a first state and enabling external incident light to be absorbed; and in the second state, the output light at the light emergent side is absorbed, so that the external incident light is reflected. The light ray controller, the display panel and the display device in the embodiments of the present description can solve the problem that the reflected image and the displayed image interfere with each other, and provide a better mirror display effect.

Description

Light controller, display panel and display device

Technical Field

One or more embodiments of the present disclosure relate to the field of display technologies, and in particular, to a light controller, a display panel, and a display device.

Background

With the continuous development of display technology, the mirror display technology gradually enters the daily life of people. In the prior art, the mirror display device can reflect the ambient light during the process of displaying the image, so that the mirror display device can be used as a mirror. However, the image reflected by the mirror display device and the displayed image are overlapped, so that interference is generated between the reflected image and the displayed image, a user cannot see the reflected image and the displayed image clearly, and the display and reflection effects of the mirror display device are reduced.

Disclosure of Invention

In view of the above, one or more embodiments of the present disclosure provide a light controller, a display panel and a display device to solve the problem of interference between a reflected image and a displayed image in a conventional mirror display device.

In view of the above, one or more embodiments of the present disclosure provide a light controller, configured to be disposed on a light emitting side of a display panel, where the light controller is configured to transmit output light from the light emitting side in a first state, so that external incident light is absorbed; and in the second state, the output light at the light emergent side is absorbed, so that the external incident light is reflected.

Optionally, the light controller includes a semi-transparent and semi-reflective polarizing plate, a liquid crystal cell, and an auxiliary polarizing plate, which are sequentially stacked along a direction away from the light exit side of the display panel, where the semi-transparent and semi-reflective polarizing plate is configured to convert output light at the light exit side into first polarized light, and the auxiliary polarizing plate is configured to convert external incident light into second polarized light;

in a first state, the liquid crystal cell rotates the first polarized light to the same direction as the polarization axis of the auxiliary polarizing plate to pass through the auxiliary polarizing plate to be emitted, and rotates the second polarized light to the same direction as the absorption axis of the transflective polarizing plate to be absorbed by the transflective polarizing plate.

Optionally, the method further includes:

in a second state, the liquid crystal cell rotates the first polarized light to be the same as the absorption axis direction of the auxiliary polarizing plate to be absorbed by the auxiliary polarizing plate, and rotates the second polarized light to be different from the absorption axis direction of the transflective polarizing plate to be reflected by the transflective polarizing plate.

Optionally, the semi-transparent and semi-reflective polarizing plate includes a polyethylene glycol terephthalate separation layer, a polarizing plate, a multilayer film reflective polarizer, and a polyethylene glycol terephthalate protective layer, which are sequentially stacked; the multilayer film reflective polarizer comprises a plurality of sub-film layers, and each sub-film layer is composed of polyethylene terephthalate and polyethylene naphthalate.

Optionally, a first adhesive is disposed between the polyethylene terephthalate separation layer and the polarizing plate, and a second adhesive is disposed between the polarizing plate and the multilayer film reflective polarizer.

Optionally, the transflective polarizing plate includes:

the polarizing plate sub-film layer is arranged close to the display panel and used for converting the output light at the light emergent side into first polarized light and absorbing the second polarized light in a first state; and the number of the first and second groups,

and the semi-transparent semi-reflective sub-film layer is arranged close to the liquid crystal box and is used for transmitting the first polarized light and reflecting the second polarized light in a second state.

Optionally, the liquid crystal cell includes:

a first transparent substrate;

the second transparent substrate is arranged between the first transparent substrate and the semi-transparent and semi-reflective polarizing plate;

the liquid crystal layer is arranged between the first transparent substrate and the second transparent substrate;

the first conducting layer is arranged on the first transparent substrate and is positioned between the first transparent substrate and the liquid crystal layer; and the number of the first and second groups,

and the second conducting layer is arranged on the second transparent substrate and is positioned between the second transparent substrate and the liquid crystal layer.

Optionally, the method further includes:

the first light-transmitting adhesive layer is used for being arranged between the light emitting side and the light controller and fixing the light controller on the display panel.

Optionally, the method further includes:

the protective layer is arranged on the surface of the light ray controller, which is far away from the display panel; and the number of the first and second groups,

and the second light-transmitting adhesive layer is arranged between the light controller and the protective layer and used for fixing the protective layer on the light controller.

One or more embodiments of the present specification further provide a display panel, where a light emitting side of the display panel is provided with the light ray controller as described in any one of the above.

One or more embodiments of the present specification also provide a display device including the display panel as described in the above embodiments.

Optionally, a plurality of light controllers are arranged on the light emitting side of the display panel; alternatively, the first and second electrodes may be,

the display panel has at least two, and at least two the display panel shares one the light controller.

As can be seen from the above description, the light ray controller, the display panel and the display device provided in one or more embodiments of the present disclosure can only implement the display function in the first state, and can only implement the mirror reflection function in the second state, so that no interference is generated between the reflected image and the displayed image, and thus, a user can see both the reflected image and the displayed image clearly, and the display and reflection effects of the mirror display device are improved; meanwhile, when the mirror reflection function is realized, the mirror reflection function can be realized without closing the display panel when a user wants to use the mirror reflection function, the operation is convenient and fast, and the use experience of the user is improved.

Drawings

In order to more clearly illustrate one or more embodiments or prior art solutions of the present specification, the drawings that are needed in the description of the embodiments or prior art will be briefly described below, and it is obvious that the drawings in the following description are only one or more embodiments of the present specification, and that other drawings may be obtained by those skilled in the art without inventive effort from these drawings.

FIG. 1a is a schematic structural diagram of a first mirror display device in the prior art;

FIG. 1b is a schematic diagram of a second mirror display device in the prior art;

FIG. 2 is a schematic diagram of a light controller according to one or more embodiments of the present disclosure;

FIG. 3a is a schematic diagram illustrating a first state of operation of one or more embodiments of the present disclosure;

FIG. 3b is a schematic diagram illustrating a second state of operation of one or more embodiments of the present disclosure;

FIG. 4 is a schematic view of a liquid crystal cell structure according to one or more embodiments of the present disclosure;

FIG. 5 is a schematic diagram of a structure of a transflective polarizer according to one or more embodiments of the present disclosure;

FIG. 6a is a schematic view of a first structure of a display device according to one or more embodiments of the present disclosure;

fig. 6b is a schematic diagram of a second structure of a display device according to one or more embodiments of the present disclosure.

Detailed Description

For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

It is to be noted that unless otherwise defined, technical or scientific terms used in one or more embodiments of the present specification should have the ordinary meaning as understood by those of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in one or more embodiments of the specification is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Fig. 1a and 1b are schematic structural diagrams of a mirror display device in the prior art. The mirror display device shown in fig. 1a implements mirror display by disposing a metal patterned reflective layer 201 on the light exit side of the display panel 100', and the metal patterned reflective layer 201 divides the display surface of the mirror display device into a mirror reflective region and a light emitting region, wherein the light emitting region can allow the output light 204 of the display device to pass through the metal patterned reflective layer 201 to be seen by human eyes, thereby implementing the display function of the mirror display device; the external incident light is reflected by the specular reflection area to generate reflected light 203 which is seen by human eyes, so that the mirror function of the mirror display device is realized. The mirror display device shown in fig. 1b realizes mirror display by disposing the transflective film layer 202 on the light-emitting side of the display panel 100', and the transflective film layer 202 can allow the output light 204 of the display device to pass through and be seen by human eyes, so as to realize the display function of the mirror display device, and can reflect the external incident light to form the reflected light 203 to be seen by human eyes, so as to realize the mirror function of the mirror display device. However, in the two types, the reflected image and the displayed image of the mirror display device are superimposed, so that interference occurs between the reflected image and the displayed image, and the user cannot see the reflected image and the displayed image, thereby reducing the display and reflection effects of the mirror display device.

For the above reasons, one or more embodiments of the present disclosure provide a light controller 200. As shown in fig. 2, the light controller 200 of the present embodiment is configured to be disposed on the light emitting side of the display panel 100, and the light controller 200 is configured to transmit the output light of the light emitting side of the display panel 100 in the first state, so that the external incident light is absorbed; in the second state, the output light of the light-emitting side of the display panel 100 is absorbed, and the external incident light is reflected.

As shown in fig. 3a, when the light controller 200 is in the first state, under the control of the light controller 200, the output light 204 emitted from the light emitting side of the display panel 100 can pass through the light controller 200 and be seen by human eyes, thereby implementing the display function; the external incident light 205 is absorbed by the light controller 200 and thus cannot be seen by human eyes, so that the mirror reflection function cannot be realized; therefore, only the display function is performed when the light controller 200 is in the first state.

As shown in fig. 3b, when the light controller 200 is in the second state, under the control of the light controller 200, the output light 204 emitted from the light-emitting side of the display panel 100 is absorbed by the light controller 200, and thus cannot be seen by human eyes, so that the display function cannot be realized; the external incident light 205 is reflected by the light controller 200 and is seen by human eyes, thereby realizing the mirror reflection function; therefore, only the mirror reflection function is realized when the light controller 200 is in the second state.

In the embodiment of the present description, the light controller 200 can only realize the display function when operating in the first state, and can only realize the mirror reflection function when operating in the second state, so that interference between the reflected image and the displayed image is avoided, and thus, a user can clearly see both the reflected image and the displayed image, and the display and reflection effects of the mirror display device are improved; meanwhile, when the specular reflection function is realized, the user can realize the specular reflection function without turning off the display panel 100 when the user wants to use the specular reflection function, which is convenient and fast, and improves the user experience.

In some alternative embodiments, as shown in fig. 2, the light controller 200 includes a transflective polarizing plate (APF/POL)91, a liquid crystal cell 24, and an auxiliary polarizing plate 25 sequentially stacked along a direction away from the light-emitting side of the display panel 100, wherein the transflective polarizing plate 91 is used for converting the output light 204 emitted from the light-emitting side of the display panel 100 into a first polarized light to enter the liquid crystal cell 24, and the auxiliary polarizing plate 25 is used for converting the external incident light 205 into a second polarized light to enter the liquid crystal cell 24.

As shown in fig. 3a, in the first state, the liquid crystal cell 24 rotates the first polarized light to the same direction as the polarization axis of the auxiliary polarizing plate 25, so that the rotated first polarized light can pass through the auxiliary polarizing plate 25 and be emitted out to be seen by human eyes, thereby implementing the display function. Meanwhile, the liquid crystal cell 24 may rotate the second polarized light to the same direction as the absorption axis of the transflective polarizing plate 91, so that the second polarized light is absorbed by the transflective polarizing plate 91 when passing through the transflective polarizing plate 91, and the second polarized light is neither transmitted by the transflective polarizing plate 91 nor reflected by the transflective polarizing plate 91, so that the mirror reflection function cannot be realized, and thus the reflected image does not interfere with the displayed image.

As shown in fig. 3b, in the second state, the liquid crystal cell 24 rotates the first polarized light to the same direction as the absorption axis of the auxiliary polarizing plate 25, so that the rotated first polarized light can be absorbed by the auxiliary polarizing plate 25 and will not be seen by human eyes, and the displayed image will not interfere with the mirror-reflected image. Meanwhile, the liquid crystal cell 24 also rotates the second polarized light to a direction different from the absorption axis of the semi-transmissive and semi-reflective polarizing plate 91, so that the second polarized light can be reflected by the semi-transmissive and semi-reflective polarizing plate 91 and seen by human eyes, i.e. a mirror reflection function is realized, and even if the display panel is not closed, the reflected image cannot be interfered by the displayed image, and the visual experience of the user on the mirror display cannot be influenced.

In the present embodiment, liquid crystal cell 24 has a Twisted Nematic (TN) liquid crystal structure, and thus the first state is a state where no voltage is applied to liquid crystal cell 24, and the second state is a state where a corresponding voltage is applied to liquid crystal cell 24. The display function can be realized when no voltage is applied to the liquid crystal cell 24, and the mirror reflection function can be realized when a voltage is applied to the liquid crystal cell 24.

Alternatively, a voltage may be applied to a partial region of the liquid crystal cell 24, and no voltage may be applied to a partial region, so that region control is performed by the light controller 200, thereby implementing a partial region display function and a partial region mirror reflection function.

In this embodiment, as shown in fig. 4, the liquid crystal cell 24 includes a first transparent substrate 245, a second transparent substrate 241, a liquid crystal layer 243, a first conductive layer 244 and a second conductive layer 242, wherein the first transparent substrate 245 is disposed on a side of the transflective polarizing plate 91 away from the display panel 100, the second transparent substrate 241 is disposed between the first transparent substrate 245 and the transflective polarizing plate 91, the first transparent substrate 245 and the second transparent substrate 241 may be made of glass, quartz, organic polymer or other suitable materials, and the first transparent substrate 245 and the second transparent substrate 241 may be made of the same material or different materials as required. The liquid crystal layer 206 includes a plurality of liquid crystal molecules. The first conductive layer 244 is disposed on the first transparent substrate 245 and located between the first transparent substrate 245 and the liquid crystal layer 243; the second conductive layer 242 is disposed on the second transparent substrate 241 and located between the second transparent substrate 241 and the liquid crystal layer 243. The material of the first conductive layer 244 and the second conductive layer 242 may include a transparent conductive material. The transparent conductive material can be indium tin oxide, indium zinc oxide, aluminum zinc oxide, combinations thereof or other transparent conductive materials. The mirror display function is realized by applying a voltage to the first conductive layer 244 and the second conductive layer 242, and the display function is realized by not applying a voltage.

In some alternative embodiments, the liquid crystal cell 24 may also adopt an In-plane switching (IPS) liquid crystal structure or a Vertical Alignment (VA) liquid crystal structure, where the first state is a state In which a voltage is applied to the liquid crystal cell 24, the second state is a state In which a corresponding voltage is not applied to the liquid crystal cell 24, and the liquid crystal cell 24 also has a corresponding structure, which has similar technical effects to the liquid crystal cell of the TN structure, and details thereof are not described herein.

In some alternative embodiments, as shown in fig. 5, the transflective polarizing plate 91 includes a Polyethylene terephthalate (PET) separation layer 911, a polarizing plate 913, a multilayer reflective Polarizer 915 (APF), and a Polyethylene terephthalate protective layer 916, which are sequentially stacked. The multilayer reflective polarizer 915 includes a plurality of sub-film layers, and each sub-film layer is formed of a pair of Polyethylene terephthalate (pet) and Polyethylene naphthalate (PEN). In one embodiment, the Multilayer reflective polarizer 915 is a Multilayer (multilayered) polarizer composed of eight hundred layers of sub-films, the thickness of the Multilayer reflective polarizer 915 is 132 μm, and the thickness of the whole transflective polarizer 91 is 370-380 μm.

Optionally, a first adhesive 912 is disposed between the polyethylene terephthalate separation layer 911 and the polarizing plate 913, and a second adhesive 914 is disposed between the polarizing plate 913 and the multilayer reflective polarizer 915. The transflective polarizing plate 91 may allow light propagating in the x direction to be transmitted therethrough and light propagating in the y direction to be reflected. Therefore, the transflective polarizer 91 can be used as a transflective film to realize a mirror reflection function, and on the other hand, the transflective polarizer 91, together with the liquid crystal cell 24 and the auxiliary polarizer 25, forms a liquid crystal switch, and the transflective polarizer 91 can simultaneously realize the above two functions, thereby saving the film cost.

In other alternative embodiments, as shown in fig. 2, the transflective polarizer 91 includes a polarizer layer 22 and a transflective layer 23. The polarizer sub-film layer 22 is disposed near the display panel 100, and is configured to convert output light of the light exit side of the display panel 100 into first polarized light and absorb second polarized light in a first state; the transflective sub-film layer 23 is disposed adjacent to the liquid crystal cell 24 and is configured to transmit the first polarized light and reflect the second polarized light in the second state.

The light controller 200 according to one or more embodiments of the present disclosure further includes a first light-transmissive adhesive layer 28, as shown in fig. 2, the first light-transmissive adhesive layer 28 is disposed between the light-emitting side of the display panel 100 and the light controller 200, and is used to fix the light controller 200 on the display panel 100. The material of the first transparent adhesive layer 28 may be oca (optically clear adhesive).

The light controller 200 according to one or more embodiments of the present disclosure further includes a protective layer (cover)27 and a second light-transmissive adhesive layer 26; the protection layer 27 is disposed on a surface of the light controller 200 away from the display panel 100, and is used for protecting the light controller 200; the second transparent adhesive layer 26 is disposed between the light controller 200 and the protection layer 27, and is used to fix the protection layer 27 on the light controller 200, and the material of the second transparent adhesive layer 26 may be OCA. In the present embodiment, the protection layer 27 is disposed on the side of the auxiliary polarizing plate 25 away from the display panel 100, and can protect the auxiliary polarizing plate 25 and other structures; the second transparent adhesive layer 26 is disposed on the protective layer 27 and the auxiliary polarizer 25, and the protective layer 27 is fixed on the auxiliary polarizer 25 through the second transparent adhesive layer 26.

Optionally, a touch layer may be further disposed between the protective layer (cover)27 and the auxiliary polarizer 25, so as to implement a touch function. The structure of the touch layer in this embodiment is the same as or similar to the structure of the touch layer in the touch display panel in the prior art, and the same function can be realized, so the details are not repeated herein.

Optionally, the light controller 200 according to this embodiment is suitable for the mirror display field of low-temperature polysilicon thin film transistor active matrix organic light emitting diode (LTPS-TFT AMOLED) displays and indium gallium zinc oxide thin film transistor active matrix organic light emitting diode (IGZO-TFT AMOLED) displays. Meanwhile, the Light controller 200 is not only suitable for a flexible Organic Light-Emitting Diode (OLED) display, but also suitable for a rigid OLED display and a liquid crystal display.

One or more embodiments of the present disclosure further provide a display panel, wherein the light emitting side of the display panel 100 is provided with the light controller 200 according to any one of the above embodiments.

In some alternative embodiments, the display panel 100 is an organic light emitting display panel. As shown in fig. 2, the organic light emitting display panel includes: the organic light emitting device includes a substrate 11, and a first electrode layer 33, an organic light emitting layer 17, and a second electrode layer 18 stacked in this order in a direction away from the substrate 11. In this embodiment, the first electrode layer 33 and the second electrode layer 18 may be made of a transparent conductive material or an opaque conductive material. The transparent conductive material includes metal oxides such as: indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, the opaque conductive material including magnesium, silver, etc. One of the first electrode layer 33 and the second electrode layer 18 serves as an anode of the organic light emitting display panel, and the other serves as a cathode of the organic light emitting display panel. For example, in this embodiment, the first electrode layer 33 is an anode, and the second electrode layer 18 is a cathode.

Optionally, the organic light emitting display panel further includes a thin film transistor including an active layer 30, a source electrode 29, a drain electrode 32, and a gate electrode 31. Meanwhile, a Buffer Layer (Buffer)12 is further disposed between the substrate 11 and the active Layer 30, a gate insulating Layer 13 is disposed between the Buffer Layer 12 and the gate electrode 31, an Inter-Layer Dielectric (ILD) 14 is disposed between the gate electrode 31 and the source electrode 29 and the drain electrode 32, a Planarization Layer (PLN)15 is disposed between the ILD 14 and the first electrode Layer 33, and a Pixel Defining Layer (PDL)16 is disposed between the first electrode Layer 33 and the organic light emitting Layer 17. Optionally, the organic light emitting display panel further includes an encapsulation layer 90, and the encapsulation layer 90 includes a silicon oxynitride sub-encapsulation layer 19, an organic material sub-encapsulation layer 20, and a silicon nitride sub-encapsulation layer 21 that are sequentially stacked along a direction away from the second electrode layer 18.

In other alternative embodiments, the display panel 100 may also be a liquid crystal display panel, and the structure of the liquid crystal display panel is the same as that of the liquid crystal display panel in the prior art, and is not described herein again.

Since the display panel of this embodiment employs the light controller 200 of the above embodiment, the display panel of this embodiment has the same beneficial effects as the light controller 200 of this embodiment, and will not be described herein again.

One or more embodiments of the present specification further provide a display device including the display panel according to any one of the above embodiments. Due to the application of the display panel described in the above embodiments, the display device of the present embodiment has the same beneficial effects as the display panel embodiments, and details are not repeated herein.

In some optional embodiments, the display panel 100 may perform a divisional display, a plurality of light controllers 200 are disposed on the light emitting side of the display panel 100, and each light controller 200 controls a different display area of the display panel 100, so as to realize that some areas of the display panel 100 are in a display working state and some areas are in a full mirror working state. As shown in fig. 6a, the number of the display panels located below is one, the display area of the display panel is divided into four sub-display areas (51, 52, 53, 54), each sub-display area is correspondingly provided with one light controller 200, and each light controller 200 can control the corresponding sub-display area to be in a display working state or in a mirror working state to meet the use requirement of the user without affecting the display function of the display panel 100. For example, in the present embodiment, the sub display region (51) is in the mirror operation state, and the sub display regions (52, 53, 54) are in the display operation state.

In other alternative embodiments, there are at least two display panels, and at least two display panels share one light controller 200, and the light controller 200 performs area control, so that some display panels are in a mirror operation state, and some display panels are in a display operation state. As shown in fig. 6b, the number of the display panels located below is nine, and the nine display panels share one light controller 200. Under the condition of not influencing the display function of each display panel, the light controller 200 is used for carrying out area control so as to enable some display panels to be in a mirror working state and enable some display panels to be in a display working state. For example, in the present embodiment, the display panels numbered 61, 63, 65, 69 are in the mirror operation state, and the display panels numbered 62, 64, 66, 67, 68 are in the display operation state.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the spirit of the present disclosure, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present description as described above, which are not provided in detail for the sake of brevity.

In addition, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown in the provided figures, for simplicity of illustration and discussion, and so as not to obscure one or more embodiments of the disclosure. Furthermore, devices may be shown in block diagram form in order to avoid obscuring the understanding of one or more embodiments of the present description, and this also takes into account the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the one or more embodiments of the present description are to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the disclosure, it should be apparent to one skilled in the art that one or more embodiments of the disclosure can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.

While the present disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic ram (dram)) may use the discussed embodiments.

It is intended that the one or more embodiments of the present specification embrace all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of one or more embodiments of the present disclosure are intended to be included within the scope of the present disclosure.

Claims

1. The light ray controller is arranged on the light emergent side of a display panel and is used for enabling output light on the light emergent side to be transmitted in a first state and enabling external incident light to be absorbed; and in the second state, the output light at the light emergent side is absorbed, so that the external incident light is reflected.

2. The light controller according to claim 1, wherein the light controller comprises a transflective polarizing plate, a liquid crystal cell, and an auxiliary polarizing plate sequentially stacked along a direction away from the light-emitting side of the display panel, the transflective polarizing plate is configured to convert the output light at the light-emitting side into a first polarized light, and the auxiliary polarizing plate is configured to convert the external incident light into a second polarized light;

3. The light controller of claim 2, further comprising:

4. The light controller of claim 3, wherein the transflective polarizing plate comprises a polyethylene terephthalate separation layer, a polarizing plate, a multilayer film reflective polarizer, and a polyethylene terephthalate protective layer, which are sequentially stacked; the multilayer film reflective polarizer comprises a plurality of sub-film layers, and each sub-film layer is composed of polyethylene terephthalate and polyethylene naphthalate.

5. The light controller of claim 4, wherein a first adhesive is disposed between the polyethylene terephthalate separating layer and the polarizing plate, and a second adhesive is disposed between the polarizing plate and the multilayer reflective polarizer.

6. The light controller of claim 3, wherein the transflective polarizer comprises:

7. A light controller according to claim 2, wherein the liquid crystal cell comprises:

a first transparent substrate;

8. The light controller of claim 1, further comprising:

9. The light controller of claim 1, further comprising:

10. A display panel, wherein the light controller as claimed in any one of claims 1 to 9 is disposed on the light emitting side of the display panel.

11. A display device characterized by comprising the display panel according to claim 10.

12. The display device according to claim 11, wherein a plurality of light controllers are disposed on a light emitting side of the display panel; alternatively, the first and second electrodes may be,