Display module and display device

Abstract

The invention relates to a display module and a display device. The display module comprises a display panel and a functional layer group. The functional layer set is arranged on the light emitting side of the display panel and comprises a heat conduction piece, an expansion piece and a light transmitting layer which are sequentially arranged in a stacked mode in the direction away from the display panel. The heat conduction part is used for adjusting the deformation state of the expansion part so as to drive the light transmitting layer to be switched between the first state and the second state. Wherein the deformation state of the expansion part is switched between a contraction state and an expansion state; when the expansion piece is in a contraction state, the light-transmitting layer is in a first state; when the expansion piece is in the expansion state, the light-transmitting layer is in the second state. The surface roughness of the surface of the side, away from the display panel, of the light-transmitting layer in the first state is smaller than the surface roughness of the surface of the side, away from the display panel, of the light-transmitting layer in the second state. Thus, the deformation state of the expansion piece can be adjusted through the heat conduction piece, then the state of the light transmitting layer is changed, and the display device can give consideration to both high-definition display and frosted eye protection display.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) display technology is regarded as the most promising new flat panel display technology of the next generation. At present, the display screens composed of OLED display panels have a display effect of either high-definition or frosted eye protection, and the two cannot be converted, which cannot adapt to the problem of taking both high-definition display and frosted eye protection display into account. Summary of the invention

[0003] Based on this, it is necessary to provide a display module and a display device that can take into account both high-definition display and frosted eye-protection display.

[0004] In a first aspect, an embodiment of the present application provides a display module, including:

[0005] Display panel;

[0006] A functional layer group is arranged on the light-emitting side of the display panel, and the functional layer group includes a heat-conducting member, an expansion member and a light-transmitting layer which are sequentially stacked in a direction away from the display panel;

[0007] The heat-conducting member is used to adjust the deformation state of the expansion member to drive the light-transmitting layer to switch between the first state and the second state;

[0008] The deformation state of the expansion member switches between a contraction state and an expansion state; when the expansion member is in the contraction state, the light-transmitting layer is in the first state; when the expansion member is in the expansion state, the light-transmitting layer is in the second state;

[0009] The surface roughness of the surface of the light-transmitting layer away from the display panel in the first state is smaller than the surface roughness of the surface of the light-transmitting layer away from the display panel in the second state.

[0010] The display module provided by the embodiment of the present application sets the functional layer group on the light-emitting side of the display panel, and the functional layer group includes a heat-conducting member, an expansion member and a light-transmitting layer which are stacked in sequence. The heat-conducting member is used to adjust the deformation state of the expansion member to drive the light-transmitting layer to switch between the first state and the second state. Among them, the deformation state of the expansion member switches between the contraction state and the expansion state; when the expansion member is in the contraction state, the light-transmitting layer is in the first state; when the expansion member is in the expansion state, the light-transmitting layer is in the second state; and the surface roughness of the light-transmitting layer in the first state is less than the surface roughness of the light-transmitting layer in the second state. The present application can adjust the deformation state of the expansion member through the heat-conducting member, and then change the state of the light-transmitting layer. In this way, when the display device needs to perform high-definition display, the light-transmitting layer is switched to the first state with lower surface roughness through the heat-conducting member, and when the display device needs to perform frosted eye protection display, the light-transmitting layer is switched to the second state with higher surface roughness through the heat-conducting member. In this way, the display device can take into account both high-definition display and frosted eye protection display.

[0011] In one embodiment, the expansion member comprises:

[0012] A base is disposed between the heat-conducting member and the light-transmitting layer, and a plurality of first recessed portions are disposed on a side of the base facing the light-transmitting layer;

[0013] A plurality of expansion parts, each of which is arranged in the first recessed part in a one-to-one correspondence; the heat conducting member is used to adjust the deformation state of the expansion part;

[0014] When the expansion part is in the expansion state, a plurality of protrusions are formed on the side of the light-transmitting layer away from the base part, so as to increase the surface roughness of the light-transmitting layer.

[0015] In one embodiment, a plurality of second recessed portions are disposed on one side of the light-transmitting layer facing the base, the plurality of first recessed portions and the plurality of second recessed portions are correspondingly arranged to form a plurality of cavities, and the expansion portions are correspondingly embedded in the cavities;

[0016] Optionally, along a direction perpendicular to the thickness of the display panel, the plurality of expansion parts are evenly spaced apart from each other.

[0017] In one embodiment, the thermal expansion coefficient of the expansion portion is greater than the thermal expansion coefficient of the light-transmitting layer;

[0018] Optionally, the thermal expansion coefficient of the expansion portion is greater than the thermal expansion coefficient of the base portion;

[0019] Optionally, the material of the expansion portion includes at least one of plastic, liquid and gas;

[0020] Optionally, the material of the expansion portion includes at least one of polycarbonate, acrylic, water and alcohol;

[0021] Optionally, the material of the light-transmitting layer includes polyimide;

[0022] Optionally, the material of the light-transmitting layer includes transparent polyimide.

[0023] In one embodiment, the heat conducting member is configured as a heat conducting wire;

[0024] Optionally, the diameter of the heat conducting wire is a;

[0025] Among them, 100nm≤a≤100μm;

[0026] Optionally, along the thickness direction of the expansion member, the orthographic projection of the heat conducting member on the plane where the display panel is located is in a grid shape.

[0027] In one of the embodiments, the temperature of the heat-conducting member when the expansion member is in the contracted state is lower than the temperature of the heat-conducting member when the expansion member is in the expanded state.

[0028] In one embodiment, the surface roughness of the light-transmitting layer is b;

[0029] Wherein, in the first state, b≤0.05μm;

[0030] In the second state, 0.5 μm≤b≤2 μm.

[0031] In one embodiment, the display module further includes:

[0032] A base layer, provided between the display panel and the heat conducting member;

[0033] Optionally, the material of the base layer includes at least one of polyimide and glass;

[0034] Optionally, the material of the base layer includes transparent polyimide;

[0035] Optionally, a thermal expansion coefficient of the expansion portion is greater than a thermal expansion coefficient of the base layer.

[0036] In one embodiment, the display module further includes:

[0037] A driving member connected to the heat-conducting member and used to control the temperature of the heat-conducting member;

[0038] Optionally, the driving member includes a heating portion, and the heating portion is thermally connected to the heat conducting member.

[0039] In a second aspect, an embodiment of the present application provides a display device, comprising the display module in the first aspect.

[0040] The display device provided in the embodiment of the present application can adjust the deformation state of the expansion part through the heat conductive part, thereby changing the state of the light-transmitting layer. In this way, when the display device is required to perform high-definition display, the light-transmitting layer is switched to the first state with lower surface roughness through the heat conductive part. When the display device is required to perform frosted eye-protection display, the light-transmitting layer is switched to the second state with higher surface roughness through the heat conductive part. In this way, the display device can take into account both high-definition display and frosted eye-protection display. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the description of the embodiments or exemplary 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 paying creative work.

[0042] Figure 1 A schematic diagram of the structure of a display module provided in one embodiment of the present application.

[0043] Figure 2 This is a schematic structural diagram of a light-transmitting layer in a display module provided in an embodiment of the present application in a first state.

[0044] Figure 3 This is a schematic structural diagram of a light-transmitting layer in a display module provided in an embodiment of the present application in a second state.

[0045] Figure 4 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0046] Figure 5 This is another structural schematic diagram of a display module provided by an embodiment of the present application.

[0047] Figure 6 A schematic diagram of another structure of a display module provided in one embodiment of the present application.

[0048] Figure 7 A schematic diagram of the structure of a display device provided in one embodiment of the present application.

[0049] Description of reference numerals:

[0050] 100, display device; 10, display module; 11, display panel; 12, functional layer group; 121, heat conducting member; 122, expansion member; 1221, base; 1221a, first recessed portion; 1222, expansion member; 123, light-transmitting layer; 1231, protrusion; 123a, second recessed portion; 124, cavity; 13, base layer; 14, driving member;

[0051] A, the light emitting side of the display panel; M, the light propagation direction of the light-transmitting layer in the first state; N, the light propagation direction of the light-transmitting layer in the second state. DETAILED DESCRIPTION

[0052] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0053] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, they do not represent any order, quantity or importance, but are only used to distinguish different components. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the present application, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0055] Currently, the display effects of display screens composed of OLED display panels are either high-definition or frosted eye-protection. There is no way to convert between the two, and it is impossible to adapt to the problem of balancing high-definition display and frosted eye-protection display.

[0056] Specifically, display screens have entered thousands of households and are applied to entertainment, education and other fields, and are used by children and adults. When used for entertainment, the display screen surface needs to be smooth and high-definition. When used by children to read text content, the display screen surface needs to have a frosted effect to achieve eye protection mode.

[0057] It should be noted that the above-mentioned display screen can be understood as a display, that is, a display device in this application, which forms an image by receiving a signal for use by a user. Of course, the above-mentioned display screen can also be understood as a screen or screen body with a display function, that is, a display module in this application. For the convenience of explanation, this application refers to a display module or a display device as a display screen.

[0058] It should be noted that the above-mentioned "the display screen needs to be smooth and high-definition for entertainment, and needs to be frosted for children" is only an exemplary statement, that is, the display screen surface can be frosted for eye protection when used for entertainment, and the display screen surface can be smooth and high-definition when used for children. In other words, a certain mode of the display screen is not limited to a specific usage occasion, and the specific usage mode of the display screen is adjusted according to the user's usage needs.

[0059] The display device in the related art only corresponds to one specific display mode, and cannot achieve the situation where both high-definition display and frosted eye protection display are taken into account. In addition, even if there is a switch of eye protection mode in the related art, the eye protection mode in the related art filters a part of the blue light to make the light emitted by the display screen softer and reduce the stimulation to the eyes. It does not fundamentally change the surface display effect of the display screen, and it is also unable to adapt to the problem of taking both high-definition display and frosted eye protection display into account.

[0060] First, refer to Figure 1 As shown, an embodiment of the present application provides a display module 10. The display module 10 includes a display panel 11 and a functional layer group 12. The functional layer group 12 is arranged on the light-emitting side of the display panel 11, and the functional layer group 12 includes a heat-conducting member 121, an expansion member 122 and a light-transmitting layer 123 which are sequentially stacked in a direction away from the display panel 11. The heat-conducting member 121 is used to adjust the deformation state of the expansion member 122 to drive the light-transmitting layer 123 to switch between a first state and a second state. Among them, the deformation state of the expansion member 122 switches between a contracted state and an expanded state; when the expansion member 122 is in a contracted state, the light-transmitting layer 123 is in a first state; when the expansion member 122 is in an expanded state, the light-transmitting layer 123 is in a second state. The surface roughness of the surface of the light-transmitting layer 123 on the side away from the display panel 11 in the first state is less than the surface roughness of the surface of the light-transmitting layer 123 on the side away from the display panel 11 in the second state.

[0061] It should be noted that, refer to Figure 1 As shown, Figure 1 A in FIG. 1 is the light-emitting side of the display panel 11. Figure 2 and Figure 3 As shown, Figure 2 M in φ is the light propagation direction of the light-transmitting layer 123 in the first state. Figure 3 N in is the light propagation direction of the light-transmitting layer 123 in the second state.

[0062] The display module 10 provided in the embodiment of the present application has a functional layer group 12 disposed on the light-emitting side of the display panel 11, and the functional layer group 12 includes a heat-conducting member 121, an expansion member 122, and a light-transmitting layer 123 which are stacked in sequence. The heat-conducting member 121 is used to adjust the deformation state of the expansion member 122 to drive the light-transmitting layer 123 to switch between a first state and a second state. Among them, the deformation state of the expansion member 122 switches between a contracted state and an expanded state; when the expansion member 122 is in a contracted state, the light-transmitting layer 123 is in a first state; when the expansion member 122 is in an expanded state, the light-transmitting layer 123 is in a second state; and the surface roughness of the light-transmitting layer 123 in the first state is less than the surface roughness of the light-transmitting layer 123 in the second state. The present application can adjust the deformation state of the expansion member 122 through the heat conductive member 121, thereby changing the state of the light-transmitting layer 123. In this way, when the display device 100 needs to perform high-definition display, the light-transmitting layer 123 is switched to the first state with lower surface roughness through the heat conductive member 121. When the display device 100 needs to perform frosted eye protection display, the light-transmitting layer 123 is switched to the second state with higher surface roughness through the heat conductive member 121. In this way, the display device 100 can take into account both high-definition display and frosted eye protection display.

[0063] It should be noted that the functional layer group 12 includes a heat conductive member 121, an expansion member 122 and a light-transmitting layer 123 which are stacked in sequence. At this time, the distance between the heat conductive member 121 and the display panel 11 is smaller than the distance between the light-transmitting layer 123 and the display panel 11, that is, along the thickness direction of the display panel 11, the display module 10 includes a display panel 11, a heat conductive member 121, an expansion member 122 and a light-transmitting layer 123 which are stacked in sequence.

[0064] Among them, the display panel 11 is a current-type organic light-emitting device, which is a phenomenon of luminescence caused by the injection and recombination of carriers, and the luminescence intensity is proportional to the injected current. Under the action of the electric field, the holes generated by the anode and the electrons generated by the cathode of the display panel 11 will move, and are injected into the hole transport layer and the electron transport layer respectively, and migrate to the light-emitting layer. When the two meet in the light-emitting layer, energy excitons are generated, thereby exciting the light-emitting molecules to finally produce visible light.

[0065] Specifically, by changing the heating state of the heat-conducting member 121, the deformation state of the expansion member 122 is adjusted. When the expansion member 122 is in the contracted state, the light-transmitting layer 123 is in the first state. At this time, the surface roughness of the light-transmitting layer 123 is small, that is, the surface of the light-transmitting layer 123 is smooth and flat, so that the light can pass through the light-transmitting layer 123 smoothly, and the transmission direction of the light does not change, that is, the light is not affected and can enter the observer's eyes, so that the observer can see a clear and sharp picture, so that the display module 10 can perform high-definition display to suit the audio-visual entertainment mode.

[0066] On the contrary, when the expansion piece 122 is in the expanded state, the light-transmitting layer 123 is in the second state. At this time, the surface roughness of the light-transmitting layer 123 is relatively large, that is, the surface of the light-transmitting layer 123 is rough, and it appears to be in a frosted state. Therefore, when the light is transmitted to the surface of the light-transmitting layer 123, due to the ups and downs of the light-transmitting layer 123, the transmission direction of part of the light changes, and part of the light is scattered, which can reduce the external reflected light, so that the observer sees the picture becomes blurred and melted, so that the observer sees the picture and text as a frosted effect, so that the display module 10 performs a frosted eye protection display, which is suitable for text reading.

[0067] Since the present application can switch the light-transmitting layer 123 between the first state and the second state, thereby switching the display module 10 between high-definition display and frosted eye-protection display, the display module 10 can adapt to the problem of balancing high-definition display and frosted eye-protection display, and users can make reasonable switches according to their own needs.

[0068] At the same time, during the process of high-definition display and frosted eye protection display, the present application changes the surface roughness of the light-transmitting layer 123, thereby changing the direction of light transmission through the light-transmitting layer 123, that is, it will not filter part of the color light in the display module 10, so that during the process of frosted eye protection display, the display effect of the display module 10 will not be reduced, thereby achieving the eye protection effect while ensuring the user experience.

[0069] In addition, the present application only needs to change the heating state of the heat conductor 121, that is, by changing the deformation state of the expansion member 122, the display module 10 can be switched between high-definition display and frosted eye protection display, which can facilitate user use and simplify user operations and avoid cumbersome switching process.

[0070] In one embodiment, the expansion member 122 includes a base 1221 and a plurality of expansion portions 1222. The base 1221 is disposed between the heat-conducting member 121 and the light-transmitting layer 123, and a plurality of first recessed portions 1221a are disposed on the side of the base 1221 facing the light-transmitting layer 123; the expansion portions 1222 are disposed in the first recessed portions 1221a one by one; the heat-conducting member 121 is used to adjust the deformation state of the expansion portions 1222; when the expansion portions 1222 are in the expanded state, a plurality of protrusions 1231 are formed on the side of the light-transmitting layer 123 away from the base 1221 to increase the surface roughness of the light-transmitting layer 123.

[0071] In this way, since the heat conductive member 121 is used to adjust the deformation state of the expansion part 1222, the state of the surface of the light-transmitting layer 123 can be changed by the deformation state of the expansion part 1222. Specifically, a plurality of first recessed parts 1221a are provided on the side of the base 1221 facing the light-transmitting layer 123. When the expansion part 1222 is in the contracted state, the expansion part 1222 is embedded in the first recessed part 1221a. At this time, the expansion part 1222 has little effect on the surface of the light-transmitting layer 123, the surface roughness of the light-transmitting layer 123 is small, the light-transmitting layer 123 is in the first state, and the display module 10 performs high-definition display.

[0072] Furthermore, when the heating state of the heat conductor 121 changes, the heat conductor 121 adjusts the expansion portion 1222 to be in an expanded state. Since the expansion portion 1222 is arranged between the base 1221 and the light-transmitting layer 123, the expansion portion 1222 will drive the light-transmitting layer 123 to form a plurality of protrusions 1231 toward the side away from the base 1221 under the action of expansion, thereby increasing the surface roughness of the light-transmitting layer 123. At this time, when light is transmitted to the light-transmitting layer 123, it will be affected by the protrusions 1231, causing the transmission direction of the light to change, thereby allowing the display module 10 to perform a frosted eye-protection display.

[0073] Due to the adjustment of the heat conductor 121, the light-transmitting layer 123 can be switched between the first state and the second state through the deformation of the expansion portion 1222, so that the display module 10 can be switched between the high-definition mode and the frosted eye protection mode, so that the display module 10 can take into account both high-definition display and frosted eye protection display.

[0074] In addition, the expansion portion 1222 can be switched between an expansion state and a contraction state through the heat conductive member 121 , and the expansion portion 1222 can be reused repeatedly, thereby reducing the production cost of the display module 10 .

[0075] In one embodiment, referring to Figure 2 , Figure 3 and Figure 4 As shown, a plurality of second recessed portions 123 a are disposed on one side of the light-transmitting layer 123 facing the base 1221 , and a plurality of first recessed portions 1221 a and a plurality of second recessed portions 123 a are correspondingly arranged to form a plurality of cavities 124 , and the expansion portions 1222 are correspondingly embedded in the cavities 124 .

[0076] Specifically, since the plurality of first recessed portions 1221a and the plurality of second recessed portions 123a are arranged one by one to form a plurality of cavities 124, the expansion portions 1222 are embedded in the cavities 124 one by one, referring to Figure 4As shown, on the one hand, the position of the expansion portion 1222 can be jointly limited by multiple first recessed portions 1221a and multiple second recessed portions 123a, thereby preventing the expansion portion 1222 from detaching from the first recessed portions 1221a when in the expanded state, thereby preventing the expansion portion 1222 from detaching from the preset position, thereby affecting the display effect of the display module 10.

[0077] On the other hand, the first recessed portion 1221a and the second recessed portion 123a can be used to prevent the expansion portion 1222 from directly contacting the base 1221 and the light-transmitting layer 123, thereby preventing the expansion portion 1222 from affecting the structures of the base 1221 and the light-transmitting layer 123, thereby ensuring normal display of the display module 10.

[0078] In addition, since there are multiple first recessed portions 1221a and second recessed portions 123a, the expansion portions 1222 are embedded in the cavity one by one, so that the surface roughness of the light-transmitting layer 123 can be further improved by the multiple expansion portions 1222 in the expanded state, thereby improving the eye protection effect of the display module 10 in the frosted eye protection mode.

[0079] In one embodiment, along a direction perpendicular to the thickness of the display panel 11 , the plurality of expansion portions 1222 are evenly spaced apart from each other.

[0080] In this way, since the multiple expansion parts 1222 are evenly spaced apart in the direction perpendicular to the thickness of the display panel 11, the multiple expansion parts 1222 can be evenly arranged, so that when the light-transmitting layer 123 switches to the second state, the transmission direction of the light changes evenly, so that the display module 10 still has a good display effect in the frosted eye protection display mode.

[0081] In addition, the multiple expansion parts 1222 are evenly spaced apart and can avoid mutual influence between the multiple expansion parts 1222 when they are switched to the expanded state, thereby avoiding the possibility of interference between the multiple expansion parts 1222, thereby further improving the display effect of the display module 10 in the frosted eye protection display mode.

[0082] In one embodiment, the thermal expansion coefficient of the expansion portion 1222 is greater than the thermal expansion coefficient of the light-transmitting layer 123 .

[0083] In this way, when the heating state of the heat conductor 121 changes, since the thermal expansion coefficient of the expansion portion 1222 is greater than the thermal expansion coefficient of the light-transmitting layer 123, that is, the degree of change in the deformation state of the expansion portion 1222 is greater than the degree of change in the deformation state of the light-transmitting layer 123, the light-transmitting layer 123 is deformed by the deformation of the expansion portion 1222, so as to avoid the light-transmitting layer 123 being deformed due to the heat from the heat conductor 121, so that the surface roughness of the light-transmitting layer 123 can be accurately controlled, thereby facilitating the accurate switching of the high-definition display and the frosted eye protection display of the display module 10.

[0084] At the same time, since the thermal expansion coefficient of the expansion part 1222 is greater than the thermal expansion coefficient of the light-transmitting layer 123, that is, the volume of the expansion part 1222 that expands due to heat is larger, the surface of the light-transmitting layer 123 can be driven to deform by the expansion part 1222 with a larger expansion volume, thereby enabling the light-transmitting layer 123 to switch between the first state and the second state.

[0085] In one embodiment, the thermal expansion coefficient of the expansion portion 1222 is greater than the thermal expansion coefficient of the base portion 1221 .

[0086] In this way, when the heating state of the heat conductor 121 changes, since the thermal expansion coefficient of the expansion portion 1222 is greater than the thermal expansion coefficient of the base 1221, that is, the degree of change in the deformation state of the expansion portion 1222 is greater than the degree of change in the deformation state of the base 1221, the surface roughness of the light-transmitting layer 123 can be accurately controlled, thereby facilitating accurate switching of the display module 10 between high-definition display and frosted eye protection display.

[0087] In one embodiment, the material of the expansion portion 1222 includes at least one of plastic, liquid and gas.

[0088] In this way, since plastic, liquid and gas have relatively large thermal expansion coefficients, the expansion portion 1222 with a larger thermal expansion coefficient can drive the light-transmitting layer 123 to switch between the first state and the second state, so that the display module 10 can take into account both high-definition display and frosted eye-protection display.

[0089] In one embodiment, the material of the expansion portion 1222 includes at least one of polycarbonate, acrylic, water and alcohol.

[0090] In this way, since polycarbonate, acrylic, water and alcohol have relatively large thermal expansion coefficients, the expansion portion 1222 with a larger thermal expansion coefficient can drive the light-transmitting layer 123 to switch between the first state and the second state, so that the display module 10 can take into account both high-definition display and frosted eye-protection display.

[0091] In one embodiment, the material of the light-transmitting layer 123 includes polyimide.

[0092] Thus, since the thermal expansion coefficient of polyimide is 2×10 -5 -3×10 -5 ℃, the thermal expansion coefficient of acrylic is 7.4×10 -5 ℃, the thermal expansion coefficient of water is 21×10 -5 ℃, that is, the thermal expansion coefficient of the expansion part 1222 is much greater than the thermal expansion coefficient of the light-transmitting layer 123, so that the surface of the light-transmitting layer 123 can be deformed by the expansion part 1222 with a larger expansion volume, so that the light-transmitting layer 123 can be switched between the first state and the second state, so that the display module 10 can take into account both high-definition display and frosted eye protection display. At the same time, the expansion part 1222 with a thermal expansion coefficient much greater than that of the light-transmitting layer 123 can improve the effect of switching the light-transmitting layer 123 between the first state and the second state, so that the display module 10 can be better switched between high-definition display and frosted eye protection display.

[0093] In one embodiment, the heat conducting element 121 is configured as a heat conducting wire.

[0094] In this way, on the one hand, the thermal wire usually has good flexibility and elasticity, which enables the thermal wire to adapt to irregular surfaces, so that when the expansion member 122 is in an expanded state, the thermal wire can still conduct heat to the uneven surface of the expansion member 122 after expansion, thereby improving the effect of conducting heat for the expansion member 122 and improving the expansion effect of the expansion member 122; on the other hand, the shape of the thermal wire makes it easier to control and operate during the processing, reducing the risk of waste and contamination of other components, thereby improving the production efficiency and product quality of the display module 10.

[0095] In one embodiment, the diameter of the heat conductive wire is a, wherein 100 nm ≤ a ≤ 100 μm.

[0096] It should be noted that 100nm≤a≤100μm, that is, the minimum diameter of the thermal conductive wire is 100nm, and the maximum diameter of the thermal conductive wire is 100μm.

[0097] In this way, since the diameter of the thermal wire is between 100 nm and 100 μm, at this size, the user cannot identify the thermal wire with the naked eye when using the display module 10 to display images, that is, the thermal wire is invisible to the naked eye, thereby avoiding the appearance of the outline of the thermal wire in the displayed image when the user uses the display module 10, thereby improving the user experience.

[0098] In one embodiment, along the thickness direction of the expansion member 122 , the orthographic projection of the heat conducting member 121 on the plane where the display panel 11 is located is in a grid shape.

[0099] Thus, since the projection of the heat conducting member 121 is in a grid shape, there is a larger contact area between the heat conducting member 121 and the expansion member 122, thereby improving the expansion effect of the expansion member 122. At the same time, since the grid shape is evenly arranged, the uniformity of the expansion member 122 under heat expansion can be ensured.

[0100] In one embodiment, the temperature of the heat-conducting member 121 when the expansion member 122 is in the contracted state is lower than the temperature of the heat-conducting member 121 when the expansion member 122 is in the expanded state.

[0101] It should be noted that the temperature of the heat conductive member 121 when the expansion member 122 is in the contracted state is lower than the temperature of the heat conductive member 121 when the expansion member 122 is in the expanded state, that is, the expansion state of the expansion member 122 is positively correlated with the increase state of the temperature of the heat conductive member 121 .

[0102] It is understandable that when a user uses the display module 10, the user wants to see the content displayed in the display module 10 more clearly, and the frosted eye protection mode is for special groups of people, such as children who need eye protection and those who need to reduce eye fatigue. That is, under normal circumstances, the display module 10 needs to ensure a clear high-definition display effect.

[0103] Since the heat conductor 121 is in a relatively low temperature state, the expansion member 122 is in a contracted state, and the display module 10 is in a high-definition display state. At this time, there is no need for an external driving device to provide energy for the heat conductor 121, which can ensure that the display module 10 is in a high-definition display mode, and the energy loss of the display module 10 can be reduced. At the same time, the heat conductor 121 is in an unheated state most of the time, which can increase the service life of the heat conductor 121, thereby increasing the service life of the display module 10.

[0104] Similarly, when the display module 10 is required to perform a frosted eye protection display, it is only necessary to increase the temperature of the heat conductor 121. That is, the temperature of the heat conductor 121 can be increased to make the expansion member 122 in an expanded state, thereby driving the light-transmitting layer 123 to switch to the second state, so that the display module 10 can perform a frosted eye protection display. On the one hand, the display module 10 can take into account both high-definition display and frosted eye protection display; on the other hand, it can facilitate the user's switching and simplify the user's operation process.

[0105] In one embodiment, the surface roughness of the light-transmitting layer 123 is b. In the first state, b≤0.05 μm; and in the second state, 0.5 μm≤b≤2 μm.

[0106] It should be noted that b≤0.05 μm, that is, the maximum surface roughness is 0.05 μm; 0.5 μm≤b≤2 μm, that is, the minimum surface roughness is 0.5 μm, and the maximum surface roughness is 2 μm.

[0107] In this way, since in the first state, the surface roughness of the light-transmitting layer 123 is less than or equal to 0.05 μm, at this time, the surface roughness of the light-transmitting layer 123 is small, that is, the surface of the light-transmitting layer 123 is smooth, so that light can pass through the light-transmitting layer 123 smoothly, and the transmission direction of the light does not change, so that the display module 10 performs high-definition display.

[0108] Because in the second state, the surface roughness of the light-transmitting layer 123 is greater than or equal to 0.5 μm and less than or equal to 2 μm, at this time, the surface roughness of the light-transmitting layer 123 is relatively large, that is, the surface of the light-transmitting layer 123 is rough, showing a frosted state, so that when the light is transmitted to the surface of the light-transmitting layer 123, due to the undulation of the light-transmitting layer 123, the transmission direction of part of the light is changed, and part of the light is scattered, so that the display module 10 performs a frosted eye-protection display.

[0109] In one embodiment, referring to Figure 5 As shown, the display module 10 further includes a base layer 13 . The base layer 13 is disposed between the display panel 11 and the heat conducting member 121 .

[0110] In this way, the base layer 13 can provide sufficient support for the functional layer group 12, so that, on the one hand, each structure of the display module 10 can be used normally, thereby ensuring the normal display of the display module 10. On the other hand, it can ensure that when the functional layer group 12 switches between different states, the structures such as the heat conductive member 121, the expansion member 122 and the light-transmitting layer 123 can be switched stably.

[0111] In one embodiment, the material of the base layer 13 includes at least one of polyimide and glass.

[0112] Thus, since the thermal expansion coefficient of polyimide is 2×10 -5 -3×10 -5 ℃, the thermal expansion coefficient of glass is 0.3×10 -5 -0.9×10 -5 ℃, the thermal expansion coefficient of acrylic is 7.4×10 -5 ℃, the thermal expansion coefficient of water is 21×10 -5℃, that is, the thermal expansion coefficient of the expansion part 1222 is much greater than the thermal expansion coefficient of the base layer 13, so that the light-transmitting layer 123 is deformed through the deformation of the expansion part 1222, so as to prevent the base layer 13 from being deformed by the heat of the heat-conducting member 121, and then the surface of the light-transmitting layer 123 can be deformed by the expansion part 1222 with a larger expansion volume, so that the light-transmitting layer 123 can be switched between the first state and the second state, so that the display module 10 can take into account both high-definition display and frosted eye protection display. At the same time, the effect of switching the light-transmitting layer 123 between the first state and the second state can be improved by the expansion part 1222 with a thermal expansion coefficient much greater than that of the base layer 13, so that the display module 10 can be better switched between high-definition display and frosted eye protection display.

[0113] In one embodiment, the material of the base layer 13 includes transparent polyimide.

[0114] In this way, since the thermal expansion coefficient of the expansion part 1222 is much larger than the thermal expansion coefficient of the base layer 13, the light-transmitting layer 123 is deformed through the deformation of the expansion part 1222 to prevent the base layer 13 from being deformed by the heat of the heat conductor 121, and then the surface of the light-transmitting layer 123 can be driven to deform by the expansion part 1222 with a larger expansion volume, and then the light-transmitting layer 123 can be switched between the first state and the second state, so that the display module 10 can take into account both high-definition display and frosted eye protection display.

[0115] In one embodiment, the thermal expansion coefficient of the expansion portion 1222 is greater than the thermal expansion coefficient of the base layer 13 .

[0116] In this way, when the heating state of the heat conductor 121 changes, since the thermal expansion coefficient of the expansion portion 1222 is greater than the thermal expansion coefficient of the base layer 13, that is, the degree of change in the deformation state of the expansion portion 1222 is greater than the degree of change in the deformation state of the base layer 13, the light-transmitting layer 123 is deformed by the deformation of the expansion portion 1222, so as to avoid the base layer 13 being deformed due to the heat of the heat conductor 121, so that the surface roughness of the light-transmitting layer 123 can be accurately controlled, thereby facilitating the accurate switching of the high-definition display and the frosted eye protection display of the display module 10.

[0117] At the same time, since the thermal expansion coefficient of the expansion part 1222 is greater than the thermal expansion coefficient of the base layer 13, that is, the volume of the expansion part 1222 that expands due to heat is larger, the surface of the light-transmitting layer 123 can be driven to deform by the expansion part 1222 with a larger expansion volume, thereby enabling the light-transmitting layer 123 to switch between the first state and the second state.

[0118] In one embodiment, referring to Figure 6As shown, the display module 10 further includes a driving member 14 . The driving member 14 is connected to the heat conducting member 121 and is used to control the temperature of the heat conducting member 121 .

[0119] In this way, the temperature of the heat-conducting member 121 can be controlled by the driving member 14. On the one hand, since the driving member 14 is only connected to the heat-conducting member 121, the driving member 14 can be prevented from interfering with structures such as the expansion member 122 and the light-transmitting layer 123, thereby ensuring the normal display of the display module 10; on the other hand, the temperature of the heat-conducting member 121 can be directly controlled by the driving member 14, thereby achieving accurate control of the temperature of the heat-conducting member 121.

[0120] In one embodiment, the driving member 14 includes a heating portion, and the heating portion is thermally connected to the heat conducting member 121 .

[0121] In this way, the temperature of the heat conducting member 121 can be adjusted by the heating unit, thereby further adjusting the deformation state of the expansion member 122. At the same time, the heat conduction efficiency of the heat conducting member 121 can be improved by the heating unit, thereby reducing the time for the display module 10 to switch from the high-definition display mode to the frosted eye protection mode.

[0122] Second, refer to Figure 7 As shown, an embodiment of the present application provides a display device 100, including the display module 10 in the first aspect.

[0123] The display device 100 provided in the embodiment of the present application can adjust the deformation state of the expansion member 122 through the heat conductive member 121, thereby changing the state of the light-transmitting layer 123. In this way, when the display device 100 is required to perform high-definition display, the light-transmitting layer 123 is switched to the first state with lower surface roughness through the heat conductive member 121. When the display device 100 is required to perform frosted eye protection display, the light-transmitting layer 123 is switched to the second state with higher surface roughness through the heat conductive member 121. In this way, the display device 100 can take into account both high-definition display and frosted eye protection display.

[0124] It can be understood that the display device 100 in the embodiment of the present application can be a laptop computer, a mobile phone, a wireless device, a personal digital assistant (PDA), a handheld or portable computer, a GPS receiver / navigator, a camera, an MP4 video player, a camcorder, a game console, a watch, a clock, a calculator, a television monitor, a flat-panel display, a computer monitor, a car display (for example, an odometer display, etc.), a navigator, a cockpit controller and / or display, a display of a camera view (for example, a display of a rearview camera in a vehicle), an electronic photo, an electronic billboard or sign, a projector, etc.

[0125] In the case of using “including”, “having”, and “comprising” described herein, another component may be added unless a clear limiting term such as “only”, “consisting of”, etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as being one in number.

[0126] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0127] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A display module, characterized in that: include: Display panel; A functional layer group, arranged on the light-emitting side of the display panel, the functional layer group comprising a heat-conducting member, an expansion member and a light-transmitting layer stacked in sequence in a direction away from the display panel; The heat-conducting member is used to adjust the deformation state of the expansion member to drive the light-transmitting layer to switch between the first state and the second state; Wherein, the deformation state of the expansion member switches between a contraction state and an expansion state; when the expansion member is in the contraction state, the light-transmitting layer is in the first state; when the expansion member is in the expansion state, the light-transmitting layer is in the second state; The surface roughness of the surface of the light-transmitting layer away from the display panel in the first state is smaller than the surface roughness of the surface of the light-transmitting layer away from the display panel in the second state.

2. The display module according to claim 1, characterized in that: The expansion member comprises: A base portion is disposed between the heat-conducting member and the light-transmitting layer, and a plurality of first recessed portions are disposed on a side of the base portion facing the light-transmitting layer; A plurality of expansion parts, each of which is disposed in the first recessed part in a one-to-one correspondence; the heat conducting member is used to adjust the deformation state of the expansion part; When the expansion portion is in the expansion state, a plurality of protrusions are formed on a side of the light-transmitting layer away from the base portion, so as to increase the surface roughness of the light-transmitting layer.

3. The display module according to claim 2, characterized in that: A plurality of second recessed parts are arranged on one side of the light-transmitting layer facing the base, the plurality of first recessed parts and the plurality of second recessed parts are arranged one by one to form a plurality of cavities, and the expansion parts are embedded in the cavities one by one; Optionally, along a direction perpendicular to the thickness of the display panel, the plurality of expansion parts are evenly spaced apart.

4. The display module according to claim 2, characterized in that: The thermal expansion coefficient of the expansion portion is greater than the thermal expansion coefficient of the light-transmitting layer; Optionally, the thermal expansion coefficient of the expansion portion is greater than the thermal expansion coefficient of the base portion; Optionally, the material of the expansion portion includes at least one of plastic, liquid and gas; Optionally, the material of the expansion portion includes at least one of polycarbonate, acrylic, water and alcohol; Optionally, the material of the light-transmitting layer includes polyimide; Optionally, the material of the light-transmitting layer includes transparent polyimide.

5. The display module according to claim 1, characterized in that: The heat conducting member is configured as a heat conducting wire; Optionally, the diameter of the thermal wire is a; Among them, 100nm≤a≤100μm; Optionally, along the thickness direction of the expansion member, the orthographic projection of the heat conducting member on the plane where the display panel is located is in a grid shape.

6. The display module according to any one of claims 1 to 5, characterized in that: When the expansion member is in the contracted state, the temperature of the heat-conducting member is lower than the temperature of the heat-conducting member when the expansion member is in the expanded state.

7. The display module according to any one of claims 1 to 5, characterized in that: The surface roughness of the light-transmitting layer is b; Wherein, in the first state, b≤0.05 μm; In the second state, 0.5 μm≤b≤2 μm.

8. The display module according to any one of claims 2 to 4, characterized in that: The display module also includes: A base layer, disposed between the display panel and the heat conducting member; Optionally, the material of the base layer includes at least one of polyimide and glass; Optionally, the material of the base layer includes transparent polyimide; Optionally, a thermal expansion coefficient of the expansion portion is greater than a thermal expansion coefficient of the base layer.

9. The display module according to any one of claims 1 to 5, characterized in that: The display module also includes: A driving member connected to the heat-conducting member and used to control the temperature of the heat-conducting member; Optionally, the driving member includes a heating portion, and the heating portion is thermally connected to the heat conducting member.

10. A display device, characterized in that: A display module comprising any one of claims 1 to 9.

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