CN112904608A

CN112904608A - Display module, driving method and display device

Info

Publication number: CN112904608A
Application number: CN202110117878.3A
Authority: CN
Inventors: 刘金豆; 李文波; 杜志宏
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-06-04
Anticipated expiration: 2041-01-28
Also published as: CN112904608B

Abstract

Disclosed herein is a display module including: the display device comprises a dimming module and a display module arranged on the dimming module; the dimming module comprises a transflective film, a first liquid crystal module and a first polarizer which are sequentially arranged; the first liquid crystal module comprises at least one first electrode, a first liquid crystal layer and at least one second electrode which are arranged in sequence; the first electrode and the second electrode form a first electric field, the first electric field controls the deflection state of liquid crystal molecules in a corresponding area in the first liquid crystal layer, so that light rays incident from one side of the first polarizer, which is close to the display module, are transmitted and/or reflected on the transflective film after passing through the corresponding area in the first liquid crystal layer, and light rays incident from one side of the transflective film, which is far away from the display module, are absorbed and/or transmitted on the first polarizer after passing through the corresponding area in the first liquid crystal layer. The display module can flexibly adjust the transmittance and/or the reflectivity of the screen area of the display module.

Description

Display module, driving method and display device

Technical Field

The present disclosure relates to, but not limited to, the field of display technologies, and in particular, to a display module, a driving method and a display device.

Background

Transflective displays are typically implemented with fixed micro-reflective and transmissive structures. The structure determines that the transmittance and the reflectivity of the screen are fixed, and if the reflectivity and the reflectivity index of the screen need to be adjusted, the micro reflection structure and the transmission structure can only be reset and cannot be dynamically adjusted.

Disclosure of Invention

In a first aspect, an embodiment of the present disclosure provides a display module, including: the display device comprises a dimming module and a display module arranged on the dimming module;

the dimming module comprises a transflective film, a first liquid crystal module and a first polarizer which are sequentially arranged;

the first liquid crystal module comprises at least one first electrode, a first liquid crystal layer and at least one second electrode which are arranged in sequence; the first electrode and the second electrode form a first electric field, the first electric field controls the deflection state of liquid crystal molecules in a corresponding area in the first liquid crystal layer, so that light rays incident from one side of the first polarizer, which is close to the display module, are transmitted and/or reflected on the transflective film after passing through the corresponding area in the first liquid crystal layer, and light rays incident from one side of the transflective film, which is far away from the display module, are absorbed and/or transmitted on the first polarizer after passing through the corresponding area in the first liquid crystal layer.

In a second aspect, an embodiment of the present disclosure provides a driving method of a display module, including:

providing a first voltage signal to a first electrode of a dimming module and a second voltage signal to a second electrode of the dimming module such that the first and second electrodes constitute a first electric field;

the deflection state of liquid crystal molecules in the corresponding area in the first liquid crystal layer is controlled through the first electric field, so that light rays incident from one side, close to the display module, of the first polarizer are transmitted and/or reflected on the transflective film after passing through the corresponding area in the first liquid crystal layer, and light rays incident from one side, far away from the display module, of the dimming module are absorbed and/or transmitted on the first polarizer after passing through the corresponding area in the first liquid crystal layer.

In a third aspect, an embodiment of the present disclosure provides a display device, including the above display module.

The display module provided by the embodiment of the disclosure comprises a dimming module and a display module arranged on the dimming module, wherein the dimming module comprises a transflective film, a first liquid crystal module and a first polarizer which are arranged in sequence; the first liquid crystal module comprises at least one first electrode, a first liquid crystal layer and at least one second electrode which are arranged in sequence; the first electrode and the second electrode form a first electric field, the first electric field controls the deflection state of liquid crystal molecules in a corresponding area in the first liquid crystal layer, so that light rays incident from one side of the first polarizer, which is close to the display module, are transmitted and/or reflected on the transflective film after passing through the corresponding area in the first liquid crystal layer, and light rays incident from one side of the transflective film, which is far away from the display module, are absorbed and/or transmitted on the first polarizer after passing through the corresponding area in the first liquid crystal layer. The embodiment can flexibly adjust the transmittance and/or the reflectivity of the screen area of the display module.

Drawings

The accompanying drawings are included to provide an understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.

Fig. 1 is a schematic structural diagram of a display module according to an embodiment of the disclosure;

fig. 2 is a schematic structural diagram of another display module according to an embodiment of the disclosure;

fig. 3 is a schematic structural diagram of another display module according to an embodiment of the disclosure;

fig. 4 is a schematic structural diagram of another display module according to an embodiment of the disclosure;

fig. 5-a is a schematic light path diagram of a reflective display mode of a display module according to an embodiment of the disclosure;

5-b is a schematic optical path diagram of a transmissive display mode of a display module according to an embodiment of the disclosure;

5-c are schematic optical path diagrams of a partially transmissive and partially reflective display mode of a display module according to an embodiment of the disclosure;

fig. 6-a is a schematic light path diagram of a black screen display mode of a display module according to an embodiment of the present disclosure;

fig. 6-b is a schematic light path diagram of a black screen display mode of another display module according to an embodiment of the disclosure;

fig. 6-c is a schematic light path diagram of a black screen display mode of another display module according to an embodiment of the disclosure;

fig. 7 is a schematic view illustrating a display module according to an embodiment of the disclosure to achieve a magic mirror display effect;

FIG. 8 is a schematic diagram of a system for adjusting transmittance and reflectance of a display module according to an embodiment of the disclosure;

FIG. 9 is a schematic diagram of another system for adjusting transmittance and reflectance of a display module according to an embodiment of the disclosure;

fig. 10 is a schematic view of an installation structure of a display module according to an embodiment of the disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that the embodiments may be implemented in a plurality of different forms. Those skilled in the art can readily appreciate the fact that the forms and details may be varied into a variety of forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the contents described in the following embodiments. The embodiments and features of the embodiments in the present disclosure may be arbitrarily combined with each other without conflict.

The ordinal numbers such as "first", "second", "third", and the like in the present specification are provided for avoiding confusion among the constituent elements, and are not limited in number.

In this specification, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically indicated and limited. For example, it may be a fixed connection, or a removable connection, or an integral connection; can be a mechanical connection, or an electrical connection; either directly or indirectly through intervening components, or both may be interconnected. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.

As shown in fig. 1, an embodiment of the present disclosure provides a display module, including: a dimming module 100 and a display module 200 disposed thereon;

the dimming module 100 comprises a transflective film 10, a first liquid crystal module 20 and a first polarizer 30 which are sequentially arranged;

the first liquid crystal module 20 comprises at least one first electrode 21, a first liquid crystal layer 23 and at least one second electrode 25 which are arranged in sequence; the first electrode and the second electrode form a first electric field, the first electric field controls the deflection state of liquid crystal molecules in a corresponding area in the first liquid crystal layer, so that light rays incident from one side of the first polarizer, which is close to the display module, are transmitted and/or reflected on the transflective film after passing through the corresponding area in the first liquid crystal layer, and light rays incident from one side of the transflective film, which is far away from the display module, are absorbed and/or transmitted on the first polarizer after passing through the corresponding area in the first liquid crystal layer.

The display module provided by the embodiment comprises a dimming module and a display module arranged on the dimming module, wherein the dimming module comprises a transflective film, a first liquid crystal module and a first polarizer which are sequentially arranged; the first electrode and the second electrode of the first liquid crystal module form a first electric field, the first electric field controls the deflection state of liquid crystal molecules in a corresponding area in the first liquid crystal layer, so that light rays incident from one side, close to the display module, of the first polarizer are transmitted and/or reflected on the transflective film after passing through the corresponding area in the first liquid crystal layer, and light rays incident from one side, far away from the display module, of the transflective film are absorbed and/or transmitted on the first polarizer after passing through the corresponding area in the first liquid crystal layer. The embodiment can flexibly adjust the transmittance and/or the reflectivity of the screen area of the display module.

In some exemplary embodiments, a side of the display module away from the dimming module is a display side of the display module.

In some exemplary embodiments, the first electrode comprises one or more first sub-electrodes, and the second electrode comprises one or more second sub-electrodes; a first sub-electrode and a second sub-electrode form a sub-electrode pair.

In some exemplary embodiments, the display module includes N pixel units; any one pixel unit is arranged corresponding to the m sub-electrode pairs; or any one sub-electrode pair is arranged corresponding to the n pixel units; wherein m is more than or equal to 1 and less than N; n is more than or equal to 1 and less than or equal to N. For example, three sub-electrode pairs may control optical path transmission of one pixel unit in the first liquid crystal layer, and one sub-electrode pair may correspond to one sub-pixel, which may be a red (R) sub-pixel, a green (G) sub-pixel, or a blue (B) sub-pixel.

In some exemplary embodiments, as shown in fig. 2, the display module is a liquid crystal display module, and the liquid crystal display module includes: the second polarizer 40, the second liquid crystal module 50 and the third polarizer 70 are arranged in sequence; alternatively, as shown in fig. 3, the display module is a liquid crystal display module, and the liquid crystal display module includes: a second liquid crystal module 50 and a third polarizer 70 arranged in this order;

the second liquid crystal module comprises at least one third electrode 51, a second liquid crystal layer 53 and at least one fourth electrode 55 which are arranged in sequence; the third electrode and the fourth electrode constitute a second electric field that controls a deflection state of liquid crystal molecules in a corresponding area in the second liquid crystal layer.

In some exemplary embodiments, as shown in fig. 2, the display module may further include a color film 60 disposed between the second liquid crystal module 50 and the third polarizer 70. The color film can realize color display.

In some exemplary embodiments, the transflective film is an optical film layer having transmitting, reflecting and polarizing effects.

In some exemplary embodiments, a transmission axis of the transflective film is orthogonal to a transmission axis of the first polarizer. In other embodiments, the transmission axis of the transflective film may be parallel to the transmission axis of the first polarizer.

In some exemplary embodiments, the transmission axis of the second polarizer is orthogonal to the transmission axis of the third polarizer. In other embodiments, the transmission axis of the second polarizer may be parallel to the transmission axis of the third polarizer.

In some exemplary embodiments, when the display module includes a second polarizer, the transmission axis of the first polarizer is parallel to the transmission axis of the second polarizer.

In one possible embodiment, the transmission axis of the transflective film is orthogonal to the transmission axis of the first polarizer, the transmission axis of the second polarizer is orthogonal to the transmission axis of the third polarizer, and the transmission axis of the first polarizer is parallel to the transmission axis of the second polarizer. For example, the first polarizer and the second polarizer have transmission axes in a first direction, the transflective film and the third polarizer have transmission axes in a second direction, and the first direction is perpendicular to the second direction. For example, the first direction is a 0-degree direction, and the second direction is a 90-degree direction. Alternatively, the first direction is a 90-degree direction, and the second direction is a 0-degree direction.

In another possible embodiment, a transmission axis of the transflective film is parallel to a transmission axis of the first polarizer, a transmission axis of the second polarizer is parallel to a transmission axis of the third polarizer, and a transmission axis of the first polarizer is parallel to a transmission axis of the second polarizer.

In other possible embodiments, the transmission axis angles of the transflective film, the first polarizer, the second polarizer and the third polarizer may be in other relations. Can be designed according to actual needs.

In some exemplary embodiments, as shown in fig. 4, when the display module includes the second polarizer, the dimming module may not include the first polarizer. That is, only one of the first polarizing plate and the second polarizing plate may be left. In one embodiment, when the dimming module does not include the first polarizer, the transmission axis of the transflective film is orthogonal to the transmission axis of the second polarizer, and the transmission axis of the second polarizer is orthogonal to the transmission axis of the third polarizer. In another embodiment, when the dimming module does not include the first polarizer, the transmission axis of the transflective film is parallel to the transmission axis of the second polarizer, and the transmission axis of the second polarizer is parallel to the transmission axis of the third polarizer.

In some exemplary embodiments, the display module includes one or more screen regions, and the display mode of any one of the screen regions of the display module includes any one of: a reflective display mode, a transmissive display mode, a black screen display mode, a partially transmissive display mode, a partially reflective display mode, and a partially transmissive and partially reflective display mode.

In some exemplary embodiments, the dimming module further includes a first substrate disposed between the transflective film and the first electrode. The first substrate may be a transparent substrate.

In some exemplary embodiments, the dimming module further includes a second substrate disposed between the second electrode and the first polarizer. The second substrate may be a transparent substrate.

In some exemplary embodiments, the first electrode and the second electrode are both transparent electrodes.

In some exemplary embodiments, the display module further includes a third substrate disposed between the second polarizer (the first polarizer when the display module does not include the second polarizer) and the third electrode. The third substrate may be a transparent substrate.

In some exemplary embodiments, the display module further includes a fourth substrate disposed between the fourth electrode and the third polarizer. The fourth substrate may be a transparent substrate.

In some exemplary embodiments, the third electrode and the fourth electrode are both transparent electrodes.

In some exemplary embodiments, the display module may be a transparent structure. Natural light or other light sources in the environment may be incident from a side of the display module away from the dimming module, or may be incident from a side of the dimming module away from the display module.

In some exemplary embodiments, the first and second liquid crystal layers may be a TN (Twisted Nematic) liquid crystal layer.

The embodiment of the disclosure provides a driving method of a display module, which includes:

the deflection state of liquid crystal molecules in the corresponding area in the first liquid crystal layer is controlled through the first electric field, so that light rays incident from one side, close to the display module, of the first polarizer are transmitted and/or reflected on the transflective film after passing through the corresponding area in the first liquid crystal layer, and light rays incident from one side, far away from the display module, of the transflective film are absorbed and/or transmitted on the first polarizer after passing through the corresponding area in the first liquid crystal layer.

In some exemplary embodiments, the first electrode comprises one or more first sub-electrodes, and the second electrode comprises one or more second sub-electrodes; providing a first voltage signal to a first electrode of a dimming module and a second voltage signal to a second electrode of the dimming module such that the first and second electrodes form a first electric field, comprising: providing a first voltage signal to a first sub-electrode of the dimming module and providing a second voltage signal to a second sub-electrode of the dimming module causes the first and second sub-electrodes to constitute a first sub-electric field. Controlling a deflection state of liquid crystal molecules of a corresponding region in the first liquid crystal layer by the first electric field, including: the deflection state of liquid crystal molecules in the corresponding area in the first liquid crystal layer is controlled through the first sub-electric field, so that light rays incident from one side, close to the display module, of the first polarizer are transmitted and/or reflected on the transflective film after passing through the corresponding area in the first liquid crystal layer, and light rays incident from one side, far away from the display module, of the transflective film are absorbed and/or transmitted on the first polarizer after passing through the corresponding area in the first liquid crystal layer.

In some exemplary embodiments, the display module is a liquid crystal display module including: the second polaroid, the second liquid crystal module and the third polaroid are arranged in sequence; or, the display module is a liquid crystal display module, including: the second liquid crystal module and the third polaroid are arranged in sequence; the second liquid crystal module comprises at least one third electrode, a second liquid crystal layer and at least one fourth electrode which are arranged in sequence; the third electrode and the fourth electrode form a second electric field, and the second electric field controls the deflection state of liquid crystal molecules in a corresponding area in the second liquid crystal layer; the driving method further includes: providing a third voltage signal to a third electrode of the display module and a fourth voltage signal to a fourth electrode of the display module such that the third and fourth electrodes form a second electric field; and controlling the deflection state of the liquid crystal molecules of the corresponding area in the second liquid crystal layer through the second electric field.

In some exemplary embodiments, the display module includes one or more screen regions, and the driving method further includes: controlling the display mode of any screen area of the display module through the first sub-electric field and/or the second electric field; wherein the display mode includes any one of: a reflective display mode, a transmissive display mode, a black screen display mode, a partially transmissive display mode, a partially reflective display mode, and a partially transmissive and partially reflective display mode.

In some exemplary embodiments, the controlling of the display mode of any one of the screen regions of the display module by the first sub-electric field and the second electric field includes performing at least one of:

setting the electric field intensity value of the first sub-electric field as a first intensity value, setting the electric field intensity value of the second electric field as a third intensity value, and controlling the display mode of the screen region to be a transmission display mode;

setting the electric field intensity value of the first sub-electric field as a first intensity value, setting the electric field intensity value of the second electric field as a fourth intensity value, and controlling the display mode of the screen area to be a black screen display mode;

setting the electric field intensity value of the first sub-electric field as a first intensity value, setting the electric field intensity value of the second electric field as a second intermediate intensity value, and controlling the display mode of the screen area to be a partial transmission display mode;

setting the electric field intensity value of the first sub-electric field as a second intensity value, setting the electric field intensity value of the second electric field as a third intensity value, and controlling the display mode of the screen area to be a reflection display mode;

setting the electric field intensity value of the first sub-electric field as a second intensity value, setting the electric field intensity value of the second electric field as a fourth intensity value, and controlling the display mode of the screen area to be a black screen display mode;

setting the electric field intensity value of the first sub-electric field as a second intensity value, setting the electric field intensity value of the second electric field as a second intermediate intensity value, and controlling the display mode of the screen area to be a partial reflection display mode;

setting the electric field intensity value of the first sub-electric field as a first middle intensity value, setting the electric field intensity value of the second electric field as a third intensity value, and controlling the display mode of the screen area to be a partial transmission and partial reflection display mode;

setting the electric field intensity value of the first sub-electric field as a first middle intensity value, setting the electric field intensity value of the second electric field as a fourth intensity value, and controlling the display mode of the screen area to be a black screen display mode;

setting the electric field intensity value of the first sub electric field as a first middle intensity value, setting the electric field intensity value of the second electric field as a second middle intensity value, and controlling the display mode of the screen area to be a partial transmission and partial reflection display mode;

the first intensity value is an electric field intensity value which enables the polarization plane of light rays entering the first liquid crystal layer not to change; the second intensity value is an electric field intensity value which enables the polarization plane of the light incident to the first liquid crystal layer to rotate by 90 degrees; the third intensity value is an electric field intensity value which enables the polarization plane of the light incident to the second liquid crystal layer not to change; the fourth intensity value is an electric field intensity value at which the polarization plane of light incident on the second liquid crystal layer is rotated by 90 degrees; the first intermediate intensity value is between the first intensity value and the second intensity value, and the second intermediate intensity value is between the third intensity value and the fourth intensity value.

In some exemplary embodiments, the minimum deflection angle of the liquid crystal molecules may be 0 degrees, and the maximum deflection angle of the liquid crystal molecules may be 90 degrees.

In some exemplary embodiments, when the first liquid crystal layer is a TN type liquid crystal layer, the electric field intensity value of the first sub electric field is a first intensity value (for example, 0V) corresponding to a horizontal arrangement of liquid crystal molecules in a corresponding region in the first liquid crystal layer, and the first liquid crystal layer does not change a deflection plane of incident polarized light; the electric field intensity value of the first sub-electric field is a second intensity value, liquid crystal molecules corresponding to a corresponding region in the first liquid crystal layer are vertically arranged, and the first liquid crystal layer rotates the deflection surface of the incident polarized light by 90 degrees; the electric field intensity value of the first sub-electric field is a first intermediate intensity value between the first intensity value and the second intensity value, liquid crystal molecules corresponding to a corresponding region in the first liquid crystal layer are obliquely arranged, and the rotation angle of a deflection surface of the first liquid crystal layer to incident polarized light is between 0 degree and 90 degrees.

In some exemplary embodiments, when the second liquid crystal layer is a TN-type liquid crystal layer, the electric field intensity value of the second electric field is a third intensity value (e.g., 0V) corresponding to a horizontal arrangement of liquid crystal molecules in a corresponding region in the second liquid crystal layer, which does not change a plane of deflection of incident polarized light; the electric field intensity value of the second electric field is a fourth intensity value, liquid crystal molecules corresponding to a corresponding area in the second liquid crystal layer are vertically arranged, and the second liquid crystal layer rotates the deflection surface of the incident polarized light by 90 degrees; the electric field intensity value of the second electric field is a second intermediate intensity value between the third intensity value and the fourth intensity value, liquid crystal molecules corresponding to corresponding areas in the second liquid crystal layer are obliquely arranged, and the rotation angle of a deflection plane of incident polarized light is between 0 degree and 90 degrees.

In some exemplary embodiments, when the screen region of the display module is in the reflective display mode, the reflectivity may be increased and the transmittance may be decreased by increasing the electric field intensity value of the sub-electric field. When the screen area of the display module is in the transmission display mode, the transmittance can be increased and the reflectivity can be reduced by reducing the electric field intensity value of the sub-electric field.

In some exemplary embodiments, the transmittance and/or reflectance of the screen region of the display module may be adjusted by the electric field intensity value of the first sub-electric field and/or the electric field intensity value of the second sub-electric field.

The following describes the control of the optical path by the first sub-electric field and/or the second electric field by taking the display module shown in fig. 2 as an example.

In the display module shown in fig. 2, the first liquid crystal layer and the second liquid crystal layer are TN liquid crystal layers, the first polarizer and the second polarizer have a transmission axis in a first direction, the transflective film and the third polarizer have a transmission axis in a second direction, the first direction is parallel to the paper surface, and the second direction is perpendicular to the paper surface.

As shown in fig. 5-a, natural light (or other light sources) enters from a side of the third polarizer, which is away from the dimming module, and becomes polarized light in the second direction after passing through the third polarizer, the polarized light in the second direction sequentially passes through the color film and the fourth electrode and then is transmitted to the second liquid crystal layer, the electric field intensity value of the second electric field is set to 0v, when the polarized light in the second direction passes through the second liquid crystal layer, the polarization plane changes, when the polarized light exits from the second liquid crystal layer, the polarization plane rotates by 90 ° and becomes polarized light in the first direction, and the polarized light in the first direction is transmitted to the dimming module through the third electrode and the second polarizer.

The electric field intensity value of the first sub-electric field is set to be the maximum value, so that liquid crystal molecules in the first liquid crystal layer are vertically arranged, and the polarization direction of polarized light does not change when the polarized light passes through the first liquid crystal layer; when the display module emits the polarized light in the first direction downwards, the polarized light in the first direction is transmitted to the transflective film through the first polarizer, the second sub-electrode, the first liquid crystal layer and the first sub-electrode in sequence, is reflected by the transflective film, and then is transmitted to the display module through the transmission of the first sub-electrode, the first liquid crystal layer, the second sub-electrode and the first polarizer in sequence. Under the electric field control mode, the screen area of the display module can realize a reflection display mode.

As shown in fig. 5-b, natural light (or other light sources) enters from a side of the third polarizer far from the dimming module, and becomes polarized light in the second direction after passing through the third polarizer, the polarized light in the second direction sequentially passes through the color film and the fourth electrode and then is transmitted to the second liquid crystal layer, the electric field intensity value of the second electric field is set to 0v, when the polarized light in the second direction passes through the second liquid crystal layer, the polarization plane changes, when the polarized light exits from the second liquid crystal layer, the polarization plane rotates by 90 ° and becomes polarized light in the first direction, and the polarized light in the first direction is transmitted to the dimming module through the third electrode and the second polarizer.

The electric field intensity value of first sub-electric field sets up to 0 volt, and when the polarized light of display module outgoing first direction down, the polarized light of first direction transmits to first liquid crystal layer after passing through first polaroid, second sub-electrode in proper order, and the polarized light of first direction changes when passing through first liquid crystal layer, and the plane of polarization has rotated 90 when the first liquid crystal layer is emergent, becomes the polarized light of second direction, the polarized light of second direction transmits to the anti-reflection film through first sub-electrode, then passes through the anti-reflection film and transmits away. Under the electric field control mode, the screen area of the display module can realize a transmission display mode.

As shown in fig. 5-b, the natural light (or other light sources) is incident from the side of the transflective film far away from the display module, and becomes polarized light of the second direction after the polarization effect of the transflective film, the polarized light of the second direction is transmitted to the first liquid crystal layer after passing through the first sub-electrode, the electric field intensity value of the first sub-electric field is set to 0v, when the polarized light of the second direction passes through the first liquid crystal layer, the polarization plane is changed, and when the polarized light exits from the first liquid crystal layer, the polarization plane is rotated by 90 ° to become polarized light of the first direction, and the polarized light of the first direction is transmitted to the display module through the second sub-electrode and the first polarizer in sequence.

The polarized light in the first direction is incident from one side of the second polarizer, which is close to the dimming module, and is transmitted to the second liquid crystal layer after passing through the second polarizer and the third electrode, the electric field intensity value of the second electric field is set to be 0V, when the polarized light in the first direction passes through the second liquid crystal layer, the polarization surface is changed, when the polarized light in the first direction is emitted from the second liquid crystal layer, the polarization surface rotates by 90 degrees to become the polarized light in the second direction, and the polarized light in the second direction is transmitted out through the fourth electrode, the color film and the third polarizer. Under the electric field control mode, the screen area of the display module can realize a transmission display mode.

As shown in fig. 5-c, the electric field intensity value of the first sub-electric field is set to a value intermediate between 0v and the maximum value, and the rotation angle of the first liquid crystal layer to light is set to a value between 0 degrees and 90 degrees. The value of the electric field intensity of the second electric field is set to an intermediate value between 0 volts and the maximum value, and the angle of rotation of the second liquid crystal layer with respect to the light is between 0 degrees and 90 degrees. When the first liquid crystal layer and the second liquid crystal layer are in the above states, the screen area of the display module may implement a partial reflective display mode for light incident from a side of the display module away from the dimming module, and implement a partial transmissive display mode for light incident from a side of the dimming module away from the display module. That is, the screen area of the display module can realize a partial transmission and partial reflection display mode, and the transmittance and the reflectivity of the screen can be adjusted through the electric field intensity value of the first sub-electric field and the electric field intensity value of the second sub-electric field.

In other embodiments, the electric field strength value of the first sub-electric field is set to an intermediate value between 0v and the maximum value, and the rotation angle of the first liquid crystal layer to light is between 0 degrees and 90 degrees. The electric field intensity of the second electric field is set to 0V, and the rotation angle of the second liquid crystal layer to light is 90 degrees. When the first liquid crystal layer and the second liquid crystal layer are in the above states, the screen area of the display module may implement a partial reflective display mode for light incident from a side of the display module away from the dimming module, and implement a partial transmissive display mode for light incident from a side of the dimming module away from the display module. That is, the transmittance and the reflectivity of the screen region of the display module can be adjusted by the electric field intensity value of the first sub-electric field.

As shown in fig. 6-a, the electric field intensity value of the second electric field is set to a maximum value so that the liquid crystal molecules in the second liquid crystal layer are vertically aligned, and the polarization direction does not change when polarized light passes through the second liquid crystal layer. The natural light is incident from one side of the display module, which is far away from the dimming module, and becomes polarized light in the second direction after passing through the third polarizer, the polarized light in the second direction is transmitted to the second polarizer after sequentially passing through the color film, the fourth electrode, the second liquid crystal layer and the third electrode, and the polarized light in the second direction is absorbed by the second polarizer and cannot be transmitted out because the direction of the transmission axis of the second polarizer is the first direction. Under the condition, the light incident from one side of the display module, which is far away from the dimming module, is absorbed by the second polaroid of the display module, and the screen area of the display module can realize a black screen display mode.

As shown in fig. 6-b, the electric field intensity value of the second electric field is set to a maximum value so that the liquid crystal molecules in the second liquid crystal layer are vertically aligned, and the polarization direction does not change when polarized light passes through the second liquid crystal layer. The polarized light of first direction is from the one side incidence that the second polaroid is close to the module of adjusting luminance, transmits to the second liquid crystal layer behind second polaroid and third electrode, and the polarized light of first direction is the polarization direction not changed when the second liquid crystal layer, and the polarized light of first direction transmits to the third polaroid through fourth electrode and various membrane, because the direction of the transmission axis of third polaroid is the second direction, so the polarized light of first direction is absorbed by the third polaroid, can not see through and go out. Under the condition, the light incident from one side of the second polaroid close to the dimming module is absorbed by the third polaroid of the display module, and the screen area of the display module can realize a black screen display mode.

As shown in fig. 6-c, the electric field intensity value of the first sub-electric field is set to a maximum value such that liquid crystal molecules in the first liquid crystal layer are vertically aligned and the polarization direction does not change when polarized light passes through the first liquid crystal layer. The nature light is from the one side incidence that the display module was kept away from to the transflective film, becomes the polarized light of second direction behind the polarization effect of transflective film, the polarized light of second direction transmits to first liquid crystal layer after passing through first sub-electrode, and the polarized light direction does not change when the polarized light of second direction passes through first liquid crystal layer, and the polarized light of second direction transmits to first polaroid through second sub-electrode, because the direction of the axle that permeates of first polaroid is first direction, so the polarized light of second direction is absorbed by first polaroid, can not pass through and go out. Under the condition, the light incident from one side of the transflective film, which is far away from the display module, is absorbed by the first polarizer of the dimming module, and the screen area of the display module can realize a black screen display mode.

As shown in fig. 7, the display module can achieve the display effect of the magic mirror. The reflection display mode or the transmission display mode can be realized in the pattern display area of the display module by controlling the electric field intensity of the first sub-electric field and/or controlling the electric field intensity of the second electric field, and the black screen display mode or the mirror surface is formed by utilizing the reflected light in other areas except the pattern display area of the display module.

In some exemplary embodiments, the transmittance and/or reflectance of the screen region of the display module may be adjusted by controlling the electric field intensity of the first sub-electric field, and/or controlling the electric field intensity of the second sub-electric field. The adjustment method includes, but is not limited to, touch pad, touch slide, button, bluetooth, etc.

As shown in fig. 8, a system for adjusting transmittance and/or reflectance of a screen area of a display module includes: photoelectric sensor, analog-to-digital converter, main control board and digital-to-analog converter. The photoelectric sensor makes a response to an external light source, a digital signal generated by the analog-to-digital converter is transmitted to the main control board, the main control board calculates according to the input digital signal to generate a target transmittance and a target reflectivity, the digital signal representing the target transmittance and/or the target reflectivity is output to the digital-to-analog converter, the digital-to-analog converter performs digital-to-analog conversion on the digital signal to generate an analog signal, and the analog signal drives the first sub-electric field and/or the second sub-electric field, so that the reflectivity and/or the transmittance of a screen area of the display module is automatically adjusted.

As shown in fig. 9, a system for adjusting transmittance and/or reflectance of a screen area of a display module includes: a photoelectric energy conversion cell and an oscillator. The photoelectric energy conversion battery supplies power to the whole system and is a photosensitive device of the system. The external sunlight irradiates the photoelectric energy conversion battery, and the voltage output by the battery correspondingly increases. The oscillator can generate oscillation waveform only by supplying power, and the output voltage value of the oscillator is approximately equal to the power supply voltage value of the oscillator. When the external light changes, the voltage of the photoelectric energy conversion cell (namely, the power supply voltage of the oscillator) changes, so that the output voltage of the oscillator changes, and the output voltage signal drives the first sub electric field and/or the second sub electric field, so that the reflectivity and/or the transmittance of the screen area of the display module are/is automatically adjusted.

In some exemplary embodiments, as shown in fig. 10, the display module may include an upper frame, a display module, an adhesive, a dimming module, a lower frame, a dimming control board, a system control board, a power supply board, and the like. The display module may be a liquid crystal display. The adhesive may reduce the influence of an air layer between the display module and the dimming module while having a high transmittance. The system control board, the dimming control board and the power supply board can not be arranged at the back of the screen because the screen needs to have certain transmittance, and therefore the system control board, the dimming control board and the power supply board can be positioned at the edge of the lower frame. Wherein the dimming control board can also be integrated into the system control board.

The embodiment of the application also provides a display device which comprises the display module.

The display device may be a liquid crystal display device or a LED (Light Emitting Diode) display device. The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention.

Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A display module, comprising: the display device comprises a dimming module and a display module arranged on the dimming module;

2. The display module of claim 1, wherein:

one side of the display module, which is far away from the dimming module, is the display side of the display module.

3. The display module of claim 2, wherein:

the first electrode comprises one or more first sub-electrodes and the second electrode comprises one or more second sub-electrodes; a first sub-electrode and a second sub-electrode form a sub-electrode pair.

4. The display module of claim 3, wherein:

the display module comprises N pixel units;

any one pixel unit is arranged corresponding to the m sub-electrode pairs; or any one sub-electrode pair is arranged corresponding to the n pixel units;

wherein m is more than or equal to 1 and less than N; n is more than or equal to 1 and less than or equal to N.

5. The display module of claim 1, wherein:

the display module is a liquid crystal display module, including: the second polaroid, the second liquid crystal module and the third polaroid are arranged in sequence; or, the display module is a liquid crystal display module, including: the second liquid crystal module and the third polaroid are arranged in sequence;

the second liquid crystal module comprises at least one third electrode, a second liquid crystal layer and at least one fourth electrode which are arranged in sequence; the third electrode and the fourth electrode constitute a second electric field that controls a deflection state of liquid crystal molecules in a corresponding area in the second liquid crystal layer.

6. The display module of claim 5, wherein:

when the display module comprises a second polaroid, the transmission axis of the first polaroid is parallel to the transmission axis of the second polaroid.

7. The display module of claim 6, wherein:

the transmission axis of the transflective film is orthogonal to the transmission axis of the first polarizer, and the transmission axis of the second polarizer is orthogonal to the transmission axis of the third polarizer.

8. The display module of claim 1, wherein:

the transflective film is an optical film layer having transmission, reflection and polarization functions.

9. The display module of claim 1, wherein:

the display module assembly includes one or more screen regions, the display mode of any one screen region of the display module assembly includes any one of the following: a reflective display mode, a transmissive display mode, a black screen display mode, a partially transmissive display mode, a partially reflective display mode, and a partially transmissive and partially reflective display mode.

10. A method of driving a display module according to any one of claims 1-9, comprising:

11. The driving method according to claim 10, characterized in that:

the first electrode comprises one or more first sub-electrodes and the second electrode comprises one or more second sub-electrodes;

providing a first voltage signal to a first electrode of a dimming module and a second voltage signal to a second electrode of the dimming module such that the first and second electrodes form a first electric field, comprising: providing a first voltage signal to a first sub-electrode of the dimming module and providing a second voltage signal to a second sub-electrode of the dimming module such that the first and second sub-electrodes constitute a first sub-electric field;

controlling a deflection state of liquid crystal molecules of a corresponding region in the first liquid crystal layer by the first electric field, including: the deflection state of liquid crystal molecules in the corresponding area in the first liquid crystal layer is controlled through the first sub-electric field, so that light rays incident from one side, close to the display module, of the first polarizer are transmitted and/or reflected on the transflective film after passing through the corresponding area in the first liquid crystal layer, and light rays incident from one side, far away from the display module, of the transflective film are absorbed and/or transmitted on the first polarizer after passing through the corresponding area in the first liquid crystal layer.

12. The driving method according to claim 11, characterized in that:

the second liquid crystal module comprises at least one third electrode, a second liquid crystal layer and at least one fourth electrode which are arranged in sequence; the third electrode and the fourth electrode form a second electric field, and the second electric field controls the deflection state of liquid crystal molecules in a corresponding area in the second liquid crystal layer;

the driving method further includes:

providing a third voltage signal to a third electrode of the display module and a fourth voltage signal to a fourth electrode of the display module such that the third and fourth electrodes form a second electric field; and controlling the deflection state of the liquid crystal molecules of the corresponding area in the second liquid crystal layer through the second electric field.

13. The driving method according to claim 12, wherein:

the display module comprises one or more screen areas, and the driving method further comprises the following steps:

controlling the display mode of any screen area of the display module through the first sub-electric field and/or the second electric field;

wherein the display mode includes any one of: a reflective display mode, a transmissive display mode, a black screen display mode, a partially transmissive display mode, a partially reflective display mode, and a partially transmissive and partially reflective display mode.

14. The driving method according to claim 13, wherein:

the display mode of any one screen area of the display module is controlled through the first sub-electric field and the second electric field, and the method comprises the following steps of:

15. A display device comprising the display module of any one of claims 1-9.