Display module and electronic equipment

Abstract

The utility model discloses a display module and electronic equipment, and belongs to the technical field of display. The display module comprises a display panel and a polarization assembly. A polarization assembly is arranged in the display module, and a liquid crystal unit in the polarization assembly has a first state and a second state. The display module controls the liquid crystal unit to be in the first state so as to ensure that the reflectivity of the display panel to ambient light can be reduced through the polarization assembly. In addition, the display module can also control the liquid crystal unit to be in the second state so as to ensure that the display panel can have certain reflecting capacity on ambient light through the polarization assembly, and therefore the display module can be used as a mirror. Therefore, according to the display module provided by the invention, the liquid crystal units in the polarization assembly are in different states, so that the polarization assembly not only has the function of reducing the reflectivity of ambient light, but also has the function of enabling the display module to be used as a mirror, and the functions of the display module are effectively enriched.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module and an electronic device. Background Art

[0002] At present, a display module generally includes: a display panel, and a circular polarizer (i.e., a wave plate and a polarizer) disposed on the light-emitting side of the display panel. The circular polarizer can reduce the amount of ambient light emitted from the light-emitting surface after being reflected by the internal structure of the display panel, thereby reducing the reflectivity of the internal structure of the display panel to ambient light.

[0003] However, the current circular polarizer only has the function of reducing the reflectivity of ambient light, resulting in a display module integrated with such a circular polarizer having a relatively single function. Utility Model Content

[0004] The embodiment of the present application provides a display module and an electronic device. The problem that the function of the display module is relatively single can be solved. The technical solution is as follows:

[0005] In one aspect, a display module is provided, comprising:

[0006] A display panel, and a polarization component located on a display side of the display panel;

[0007] The polarization component comprises: a wave plate and a linear polarizer which are stacked, and a liquid crystal unit located between the wave plate and the linear polarizer, wherein the wave plate is closer to the display panel than the linear polarizer, and the liquid crystal unit has a first state and a second state;

[0008] Wherein, when the liquid crystal unit is in a first state, the ambient light directed toward the display side of the display panel is reflected by the display panel, and the reflected ambient light is sequentially transmitted through the wave plate and the liquid crystal unit and then absorbed by the linear polarizer; when the liquid crystal unit is in a second state, the ambient light directed toward the display side of the display panel is reflected by the display panel, and the reflected ambient light is sequentially transmitted through the wave plate, the liquid crystal unit and the linear polarizer and then emitted.

[0009] Optionally, when the liquid crystal unit is in a first state, ambient light directed toward the display side of the display panel can be converted into a first circularly polarized light by the polarization component; when the liquid crystal unit is in a second state, ambient light directed toward the display side of the display panel can be converted into a first linearly polarized light by the polarization component, and the polarization direction of the first linear polarized light is parallel to the polarization direction of the linear polarizer.

[0010] Optionally, when the liquid crystal unit is in the second state, the liquid crystal unit is used to adjust the phase delay of light passing through the liquid crystal unit, and the phase delay adjusted by the light passing through the liquid crystal unit is in opposite directions to the phase delay adjusted by the wave plate.

[0011] Optionally, when the liquid crystal unit is in the first state, the phase of the light irradiated toward the liquid crystal unit is consistent with the phase of the light after being transmitted through the liquid crystal unit.

[0012] Optionally, the liquid crystal unit comprises: a first electrode and a second electrode stacked and arranged opposite to each other, and a liquid crystal layer located between the first electrode and the second electrode; the first electrode is closer to the wave plate than the second electrode;

[0013] A voltage is applied between the first electrode and the second electrode, so that the liquid crystal layer is in the second state; and no voltage is applied between the first electrode and the second electrode, so that the liquid crystal layer is in the first state.

[0014] Optionally, both the first electrode and the second electrode are planar electrodes arranged in an entire layer.

[0015] Optionally, the liquid crystal layer is a colloid layer mixed with polymer dispersed liquid crystal molecules.

[0016] Optionally, the wave plate is a quarter-wavelength wave plate.

[0017] Optionally, the polarization component further includes: a first colloid layer located between the linear polarizer and the liquid crystal unit, and a second colloid layer located between the liquid crystal unit and the wave plate.

[0018] On the other hand, an electronic device is provided, comprising: a frame, and a display module connected to the frame, wherein the display module is any one of the display modules described above.

[0019] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0020] A display module includes: a display panel and a polarization component. The polarization component is arranged in the display module, and the liquid crystal unit in the polarization component has a first state and a second state. The display module controls the liquid crystal unit to be in the first state to ensure that the reflectivity of the display panel to ambient light can be reduced by the polarization component. The display module can also control the liquid crystal unit to be in the second state to ensure that the display panel can have a certain reflectivity to ambient light through the polarization component, thereby allowing the display module to be used as a mirror. In this way, the display module provided by the present application can ensure that the polarization component not only has the function of reducing the reflectivity to ambient light, but also has the function of allowing the display module to be used as a mirror by allowing the liquid crystal unit in the polarization component to be in different states, thereby effectively enriching the function of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 is a structural schematic diagram of a display module provided in an embodiment of the present application;

[0023] Figure 2 is a light path diagram of ambient light directed toward a polarization component after being reflected by a display panel, provided in an embodiment of the present application;

[0024] Figure 3 is another light path diagram of ambient light directed toward a polarization component after being reflected by a display panel, provided in an embodiment of the present application;

[0025] Figure 4 is a schematic diagram of the structure of another display module provided in an embodiment of the present application;

[0026] Figure 5 It is a structural schematic diagram of another display module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0028] Please refer to Figure 1 , Figure 1 1 is a schematic diagram of a display module provided in an embodiment of the present application. The display module 000 may include: a display panel 100 and a polarization component 200 located on the display side of the display panel 100 .

[0029] The display panel 100 in the display module 000 can be used to display images. The display side of the display panel 100 is the side of the display panel 100 used to display images.

[0030] The polarization component 200 in the display module 000 may include: a wave plate 201 and a linear polarizer 202 that are stacked, and a liquid crystal unit 203 located between the wave plate 201 and the linear polarizer 202. Here, the wave plate 201 in the polarization component 200 may be closer to the display panel 100 than the linear polarizer 202. Among them, the linear polarizer 202 in the polarization component 200 may be used to convert ambient light directed toward the display side of the display panel 100 into linearly polarized light. The wave plate 201 in the polarization component 200 may be used to adjust the phase delay of light passing through the wave plate 201. For example, the wave plate 201 may be a quarter-wave wave plate. When light passes through the wave plate 201 in the polarization component 200, a phase delay of an odd multiple of π / 2 may be generated, so that the wave plate 201 may convert linearly polarized light into circularly polarized light, or convert circularly polarized light into linearly polarized light.

[0031] The liquid crystal unit 203 in the polarization component 200 can have a first state and a second state, wherein when the liquid crystal unit 203 is in the first state, the ambient light directed to the display side of the display panel 100 is reflected by the display panel 100, and the reflected ambient light can sequentially pass through the wave plate 201 and the liquid crystal unit 203 in the polarization component 200 and then be absorbed by the linear polarizer 202. When the liquid crystal unit 203 is in the second state, the ambient light directed to the display side of the display panel 100 is reflected by the display panel 100, and the reflected ambient light can sequentially pass through the wave plate 201, the liquid crystal unit 203 and the linear polarizer 202 and then be emitted.

[0032] Exemplarily, when the liquid crystal unit 203 is in the first state, as shown in FIG. Figure 2 As shown, Figure 2This is a light path diagram of an ambient light directed to a polarization component after being reflected by a display panel provided by an embodiment of the present application. In the process of the ambient light directed to the display side of the display panel 100 passing through the polarization component 200, after the ambient light passes through the linear polarizer 202 in the polarization component 200, the linear polarizer 202 can convert the ambient light into a first linear polarized light L1, and the polarization direction of the first linear polarized light L1 can be parallel to the polarization direction of the linear polarizer 202. After the first linear polarized light L1 passes through the liquid crystal unit 203 in the first state, the polarization direction of the first linear polarized light L1 emitted from the liquid crystal unit 203 in the first state remains unchanged. After the first linear polarized light L1 passes through the wave plate 201, the wave plate 201 can convert the first linear polarized light L1 into a first circularly polarized light R1. For this reason, after the first circularly polarized light R1 is directed to the display panel 100, it can be reflected by the metal electrode layer or other reflective film layer integrated in the display panel 100, and the reflected light can be the second circularly polarized light R2. Here, one of the first circularly polarized light R1 and the second circularly polarized light R2 may be left-handed circularly polarized light, and the other may be right-handed circularly polarized light. Afterwards, the second circularly polarized light R2 may be converted into the second polarized light L2 by the wave plate 201 after passing through the wave plate 201, and the polarization direction of the second polarized light L2 is perpendicular to the polarization direction of the first linear polarized light L1. After the second polarized light L2 passes through the liquid crystal unit 203 in the first state, the polarization direction of the second polarized light L2 remains unchanged. Since the polarization direction of the second polarized light L2 is perpendicular to the polarization direction of the linear polarizer 202, the second polarized light L2 directed toward the linear polarizer 202 may be absorbed by the linear polarizer 202.

[0033] In this case, when the liquid crystal unit 203 is in the first state, the reflectivity of the display panel 100 to the ambient light can be reduced by the polarization component 200 disposed on the display side of the display panel 100 .

[0034] When the liquid crystal unit 203 is in the second state, Figure 3 As shown, Figure 3This is another light path diagram of ambient light directed to the polarization component after being reflected by the display panel provided by an embodiment of the present application. In the process of the ambient light directed to the display side of the display panel 100 passing through the polarization component 200, after the ambient light passes through the linear polarizer 202 in the polarization component 200, the linear polarizer 202 can convert the ambient light into the first linear polarized light L1, and the polarization direction of the first linear polarized light L1 can be parallel to the polarization direction of the linear polarizer 202. After the first linear polarized light L1 passes through the liquid crystal unit 203 in the second state, the liquid crystal unit 203 can convert the first linear polarized light L1 into circular polarized light, and after the circular polarized light passes through the wave plate 201, the wave plate 201 can convert the circular polarized light back into the first linear polarized light L1. For this reason, after the first linear polarized light L1 is directed to the display panel 100, it can be reflected by the metal electrode layer or other reflective film layer integrated in the display panel 100, and the reflected light can still be the first linear polarized light L1. Afterwards, the first linear polarized light L1 can be converted into circular polarized light by the wave plate 201 after passing through the wave plate 201. After the circular polarized light passes through the liquid crystal unit 203 in the second state, the liquid crystal unit 203 can convert the circular polarized light back into the first linear polarized light L1. Since the polarization direction of the first polarized light L1 is parallel to the polarization direction of the linear polarizer 202, the first polarized light L1 directed toward the linear polarizer 202 can be emitted through the linear polarizer 202.

[0035] In this case, when the liquid crystal unit 203 is in the second state, the polarization component 200 disposed on the display side of the display panel 100 can allow the display panel 100 to have a certain reflective ability to the ambient light, so that the display module 000 can be used as a mirror.

[0036] To this end, the display module 000 controls the liquid crystal unit 203 to be in a first state to ensure that the reflectivity of the display panel 100 to the ambient light can be reduced through the polarization component 200. The display module 000 can also control the liquid crystal unit 203 to be in a second state to ensure that the display panel 100 has a certain reflectivity to the ambient light through the polarization component 200, thereby making the display module 000 can be used as a mirror. In this way, the display module 000 provided by the present application can ensure that the polarization component 200 not only has the function of reducing the reflectivity to the ambient light, but also has the function of allowing the display module 000 to be used as a mirror by making the liquid crystal unit 203 in the polarization component 200 in different states, thereby effectively enriching the function of the display module 000.

[0037] In summary, a display module provided in an embodiment of the present application includes: a display panel and a polarization component. A polarization component is provided in the display module, and a liquid crystal unit in the polarization component has a first state and a second state. The display module controls the liquid crystal unit to be in the first state to ensure that the reflectivity of the display panel to ambient light can be reduced by the polarization component. The display module can also control the liquid crystal unit to be in the second state to ensure that the display panel can have a certain reflective ability to ambient light through the polarization component, thereby allowing the display module to be used as a mirror. In this way, the display module provided by the present application can ensure that the polarization component not only has the function of reducing the reflectivity to ambient light, but also has the function of allowing the display module to be used as a mirror by allowing the liquid crystal unit in the polarization component to be in different states, thereby effectively enriching the function of the display module.

[0038] In the present application, when the liquid crystal unit 203 in the polarization component 200 is in the second state, the liquid crystal unit 203 in the polarization component 200 can be used to adjust the phase delay of the light passing through the liquid crystal unit 203. For example, the light passing through the liquid crystal unit 203 in the second state can produce a phase delay of an odd multiple of -π / 2, so that the liquid crystal unit 203 in the second state can convert linear polarized light into circular polarized light, and can also convert circular polarized light into linear polarized light.

[0039] The phase delay adjusted by the light passing through the liquid crystal unit 203 in the second state in the polarization component 200 is in opposite directions to the phase delay adjusted by the light passing through the wave plate 201 in the polarization component 200. For example, when the light passes through the liquid crystal unit 203 in the second state, a phase delay of an odd number of -π / 2 may be generated, and when the light passes through the wave plate 201, a phase delay of an odd number of π / 2 may be generated. In this way, when the light passes through the wave plate 201 and the liquid crystal unit 203 in the second state in sequence, the phase delay adjusted by the wave plate 201 to the light passing through the wave plate 201 can be offset by the phase delay adjusted by the liquid crystal unit 203 in the second state to the light.

[0040] In this case, when the ambient light directed toward the display side of the display panel 100 passes through the polarization component 200, the linear polarizer 202 can convert the ambient light into the first linear polarized light L1 after passing through the linear polarizer 202 in the polarization component 200. After the first linear polarized light L1 passes through the liquid crystal unit 203 and the wave plate 201 in the second state in sequence, the phase of the first linear polarized light L1 does not change.

[0041] In the present application, when the liquid crystal unit 203 in the polarization component 200 is in the first state, the phase of the light irradiated to the liquid crystal unit 203 is consistent with the phase of the light transmitted through the liquid crystal unit 203. That is, when the liquid crystal unit 203 in the polarization component 200 is in the first state, the liquid crystal unit 203 in the first state does not change the phase of the light passing through the liquid crystal unit 203.

[0042] In this case, when the ambient light directed toward the display side of the display panel 100 passes through the polarization component 200, the linear polarization plate 202 can convert the ambient light into the first linear polarization light L1 after passing through the linear polarization plate 202 in the polarization component 200. After the first linear polarization light L1 passes through the liquid crystal unit 203 in the first state, the phase of the first linear polarization light L1 emitted from the liquid crystal unit 203 in the first state does not change. After the first linear polarization light L1 passes through the wave plate 201, the wave plate 201 can adjust the phase delay of the first linear polarization light L1.

[0043] In the examples of this application, please refer to Figure 4 , Figure 4 2 is a schematic diagram of the structure of another display module provided in an embodiment of the present application. The liquid crystal unit 203 in the polarization component 200 may include: a first electrode 2031 and a second electrode 2033 stacked and arranged opposite to each other, and a liquid crystal layer 2032 located between the first electrode 2031 and the second electrode 2033. The first electrode 2031 may be closer to the wave plate 201 than the second electrode 2033.

[0044] In the present application, a voltage may be applied between the first electrode 2031 and the second electrode 2033 in the liquid crystal unit 203, so that the liquid crystal layer 2032 may be in the second state. For example, the display module 000 may apply two different potentials to the first electrode 2031 and the second electrode 2033, respectively, so that a voltage is applied between the first electrode 2031 and the second electrode 2033. For example, the display module 000 may apply a negative potential to the first electrode 2031 and a positive potential to the second electrode 2033. In this way, a vertical electric field may be formed between the two, and the liquid crystal molecules in the liquid crystal layer 2032 between the two may be deflected under the action of the vertical electric field, and the long axis of the deflected liquid crystal molecules is parallel to the direction of the vertical electric field, so that the liquid crystal layer 2032 may be in the second state. In this way, the liquid crystal unit 203 in the polarization component 200 may be used to adjust the phase delay of the light passing through the liquid crystal unit 203.

[0045] There may be no voltage applied between the first electrode 2031 and the second electrode 2033 in the liquid crystal unit 203, so that the liquid crystal layer 2032 may be in the first state. For example, the display module 000 may apply the same potential to the first electrode 2031 and the second electrode 2033 at the same time, so that there is no voltage applied between the first electrode 2031 and the second electrode 2033. For example, the display module 000 may apply a potential of 0 volts to the first electrode 2031 and the second electrode 2033 at the same time, that is, the first electrode 2031 and the second electrode 2033 are not applied with a potential at the same time. In this way, a vertical electric field will not be formed between the two, and the liquid crystal molecules in the liquid crystal layer 2032 between the two are arranged in a disordered manner, so that the liquid crystal layer 2032 is in the first state. In this way, the liquid crystal unit 203 will not adjust the phase of the light passing through the liquid crystal unit 203.

[0046] In the implementation of this application, if Figure 4 As shown, the first electrode 2031 and the second electrode 2033 in the liquid crystal unit 203 can be planar electrodes arranged in a whole layer. In this way, the manufacturing difficulty of the display module 000 can be effectively simplified, and the manufacturing cost of the display module 000 can be reduced.

[0047] In the embodiment of the present application, the liquid crystal layer 2032 may be a colloid layer mixed with polymer dispersed liquid crystal molecules (English: Polymer Dispersed Liquid Crystal; abbreviated: PDLC).

[0048] Working principle of PDLC: PDLC is a mixture of low-molecular liquid crystal and prepolymer, which undergoes polymerization reaction under certain conditions to form micron-sized liquid crystal particles that are uniformly dispersed in a polymer matrix, and then the dielectric anisotropy of the liquid crystal molecules is used to obtain a material with electro-optical response characteristics, without the need for polarizers and orientation layers. The optical properties of PDLC depend on the degree of matching between the effective refractive index of the liquid crystal molecules and the refractive index of the polymer matrix. Among them, when no voltage is applied to PDLC, the liquid crystal molecules are disorderly arranged, and the incident light is irradiated to PDLC and refracted and reflected multiple times at the interface between the liquid crystal molecules and the polymer matrix. When voltage is applied to PDLC, the liquid crystal molecules are arranged along the direction of the electric field, and the incident light will not be reflected or refracted after irradiating the PDLC, and can pass directly through the PDLC.

[0049] In the process of preparing the liquid crystal layer 2032, a layer of PDLC liquid crystal film can be uniformly coated on the panel formed with the first electrode 2031, and then the layer of PDLC liquid crystal film is cured, and the cured PDLC liquid crystal film is patterned to obtain the liquid crystal layer 2032. In this way, there is no need to add a separate patterning process to form the liquid crystal layer 2032 in the liquid crystal unit 203, which can effectively simplify the manufacturing difficulty of the display module 000 and reduce the manufacturing cost of the display module 000.

[0050] In the examples of this application, please refer to Figure 5 , Figure 5 The polarization component 200 may further include: a first colloid layer 300 located between the linear polarizer 202 and the liquid crystal unit 203 , and a second colloid layer 400 located between the liquid crystal unit 203 and the wave plate 201 .

[0051] Here, the first colloid layer 300 can be bonded to the linear polarizer 202 and the liquid crystal unit 203 respectively, so that the linear polarizer 202 and the liquid crystal unit 203 can be bonded together through the first colloid layer 300, so that the connection between the linear polarizer 202 and the liquid crystal unit 203 in the polarization component 200 is more stable.

[0052] The second colloid layer 400 can be bonded to the liquid crystal unit 203 and the wave plate 201 respectively, so that the liquid crystal unit 203 and the wave plate 201 can be bonded together through the second colloid layer 400, so that the connection between the liquid crystal unit 203 and the wave plate 201 in the polarization component 200 is more stable.

[0053] In summary, a display module provided in an embodiment of the present application includes: a display panel and a polarization component. A polarization component is provided in the display module, and a liquid crystal unit in the polarization component has a first state and a second state. The display module controls the liquid crystal unit to be in the first state to ensure that the reflectivity of the display panel to ambient light can be reduced by the polarization component. The display module can also control the liquid crystal unit to be in the second state to ensure that the display panel can have a certain reflective ability to ambient light through the polarization component, thereby allowing the display module to be used as a mirror. In this way, the display module provided by the present application can ensure that the polarization component not only has the function of reducing the reflectivity to ambient light, but also has the function of allowing the display module to be used as a mirror by allowing the liquid crystal unit in the polarization component to be in different states, thereby effectively enriching the function of the display module.

[0054] The embodiment of the present application also provides an electronic device, which can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, an advertising machine, a display screen, a digital photo frame, a vehicle-mounted terminal, etc. The electronic device may include: a frame, and a display module connected to the frame, and the display module is any display module in the above embodiments.

[0055] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0056] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A display module, characterized in that: include: A display panel, and a polarization component located on a display side of the display panel; The polarization component comprises: a wave plate and a linear polarizer which are stacked, and a liquid crystal unit located between the wave plate and the linear polarizer, wherein the wave plate is closer to the display panel than the linear polarizer, and the liquid crystal unit has a first state and a second state; Wherein, when the liquid crystal unit is in a first state, the ambient light directed toward the display side of the display panel is reflected by the display panel, and the reflected ambient light is sequentially transmitted through the wave plate and the liquid crystal unit and then absorbed by the linear polarizer; when the liquid crystal unit is in a second state, the ambient light directed toward the display side of the display panel is reflected by the display panel, and the reflected ambient light is sequentially transmitted through the wave plate, the liquid crystal unit and the linear polarizer and then emitted.

2. The display module according to claim 1, characterized in that: When the liquid crystal unit is in a first state, the ambient light directed toward the display side of the display panel can be converted into a first circularly polarized light by the polarization component; when the liquid crystal unit is in a second state, the ambient light directed toward the display side of the display panel can be converted into a first linearly polarized light by the polarization component, and the polarization direction of the first linear polarized light is parallel to the polarization direction of the linear polarizer.

3. The display module according to claim 2, characterized in that: When the liquid crystal unit is in the second state, the liquid crystal unit is used to adjust the phase delay of the light passing through the liquid crystal unit, and the phase delay adjusted by the light passing through the liquid crystal unit is opposite to the phase delay adjusted by the wave plate.

4. The display module according to claim 2, characterized in that: When the liquid crystal unit is in the first state, the phase of the light irradiated to the liquid crystal unit is consistent with the phase of the light after being transmitted through the liquid crystal unit.

5. The display module according to any one of claims 1 to 4, characterized in that: The liquid crystal unit comprises: a first electrode and a second electrode stacked and arranged opposite to each other, and a liquid crystal layer located between the first electrode and the second electrode; the first electrode is closer to the wave plate than the second electrode; A voltage is applied between the first electrode and the second electrode, so that the liquid crystal layer is in the second state; and no voltage is applied between the first electrode and the second electrode, so that the liquid crystal layer is in the first state.

6. The display module according to claim 5, characterized in that: The first electrode and the second electrode are both planar electrodes arranged in an entire layer.

7. The display module according to claim 5, characterized in that: The liquid crystal layer is a colloid layer mixed with polymer dispersed liquid crystal molecules.

8. The display module according to any one of claims 1 to 4, characterized in that: The wave plate is a quarter-wave wave plate.

9. The display module according to any one of claims 1 to 4, characterized in that: The polarization component further includes: a first colloid layer located between the linear polarizer and the liquid crystal unit, and a second colloid layer located between the liquid crystal unit and the wave plate.

10. An electronic device, characterized in that: include: A frame, and a display module connected to the frame, wherein the display module is the display module according to any one of claims 1 to 9.

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