Display module low-temperature heating device, low-temperature heating driving method and display system

Abstract

This invention discloses a low-temperature heating device, a low-temperature heating driving method, and a display system for a display module. The low-temperature heating device includes a heating module, a conveying module, a retracting module, a power module, and a control module. The temperature detection module, power module, and heating module of the display module are all connected to the control module. The conveying module is connected to the power module. The control module controls the power module to provide power to the conveying module based on the display module temperature detected by the temperature detection module, so that the conveying module transports the heating module, causing the heating module to wrap around or retract the display module. The control module also controls the heating state of the heating module based on the display module temperature detected by the temperature detection module. This invention can quickly and effectively heat the display module, allowing it to display and be viewed normally. It also effectively prevents heat convection inside and outside the display module, thus solving the problem of display module cracking during heating.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a low-temperature heating device for a display module, a low-temperature heating driving method, and a display system. Background Technology

[0002] Currently, display modules in display systems are prone to response delays or even display failures at low temperatures (around -40°C). To address this, transparent conductive films can be placed on the side of the color filter substrate near the cover plate and on the side of the array substrate away from the cover plate. By energizing the transparent conductive film, the resistive heating effect of the film efficiently converts electrical energy into heat energy, achieving the purpose of heating the display module without affecting the transparency of the glass. However, this method of heating the display module results in slow overall heating and excessively rapid localized heating. Consequently, under conditions of significant internal and external temperature differences, thermal convection can easily occur between the inside and outside of the display module, posing a risk of cracking. Furthermore, in low-temperature and high-humidity environments, condensation easily forms on the display screen, leading to fogging and frosting, which cannot be effectively and quickly removed, thus affecting the normal viewing of the display image. Summary of the Invention

[0003] This invention provides a display module low-temperature heating device, a low-temperature heating driving method, and a display system to quickly and effectively heat the display module, enabling it to display and be viewed normally. Furthermore, during the heating process, it effectively prevents heat convection inside and outside the display module, thereby solving the problem of display module cracking during heating.

[0004] In a first aspect, embodiments of the present invention provide a low-temperature heating device for a display module, which includes a heating module, a conveying module, a gathering module, a power module, and a control module.

[0005] The transmission module is disposed on the first edge side, the second edge side, and the side away from the display screen of the display module. The first edge side and the second edge side are any two opposite edges of the display module, and the side away from the display screen is the side of the display module away from the cover plate.

[0006] The temperature detection module, power module, and heating module of the display module are all connected to the control module. The transmission module is connected to the power module. The control module is used to control the power module to provide power to the transmission module according to the temperature of the display module detected by the temperature detection module, so that the transmission module transports the heating module so that the heating module wraps around the display module or is gathered into the gathering module. The control module is also used to control the heating state of the heating module according to the temperature of the display module detected by the temperature detection module.

[0007] Optionally, the heating module includes a first heating unit and a second heating unit; the conveying module includes a first conveying unit and a second conveying unit; the gathering module includes a first gathering unit and a second gathering unit; and the power module includes a first power unit and a second power unit.

[0008] The first transmission unit is disposed on the first edge side of the display module and half of the side facing away from the display screen near the first edge side; the first retracting unit is disposed on the first edge side of the display module;

[0009] Both the first power unit and the first heating unit are connected to the control module. The control module is used to control the operating state of the first power unit and the heating state of the first heating unit according to the temperature of the display module. The first conveying unit is connected to the first power unit and is used to convey the first heating unit so that the first heating unit wraps around half of the display module near the first edge or is gathered into the first gathering unit.

[0010] The second transmission unit is disposed on the second edge side of the display module and half of the side facing away from the display screen near the second edge side; the second retracting unit is disposed on the second edge side of the display module.

[0011] The second power unit and the second heating unit are both connected to the control module. The control module is used to control the operating state of the second power unit and the heating state of the second heating unit according to the temperature of the display module. The second conveying unit is connected to the second power unit and is used to convey the second heating unit so that the second heating unit wraps around half of the display module near the second edge or is gathered into the second gathering unit.

[0012] Optionally, the first conveying unit includes a plurality of first conveying shafts and a first conveyor belt;

[0013] The first conveyor shaft is disposed on the first edge side and the half area of ​​the side away from the display screen near the first edge side. The first conveyor belt is disposed on the first conveyor shaft and the first power unit. The first end of the first heating unit is fixed to the first conveyor belt.

[0014] Optionally, the second conveying unit includes a plurality of second conveying shafts and a second conveyor belt;

[0015] The second conveyor shaft is disposed on the second edge side and half of the area of ​​the side facing away from the display screen near the second edge side. The second conveyor belt is disposed on the second conveyor shaft and the second power unit. The first end of the second heating unit is fixed to the second conveyor belt.

[0016] Optionally, the display module cryogenic heating device also includes a conveyor track and a track slider;

[0017] The conveying track is disposed in the first and second frame areas opposite to the display module cover plate, and the conveying track extends toward the first edge side and the second edge side; the track slider is disposed within the conveying track;

[0018] The track slider is connected to the second end of the first heating unit and the second end of the second heating unit. The track slider is used to fix the heating module and drive the heating module to move along the fixed track to cover the cover plate of the display module.

[0019] Optionally, the first heating unit includes a plurality of first resistance wires, the extension direction of which is perpendicular to the conveying track;

[0020] The second heating unit includes a plurality of second resistance wires, the extension direction of which is perpendicular to the conveying track.

[0021] Optionally, the display module low-temperature heating device also includes a heat insulation layer;

[0022] The insulation layer is located on the side of the heating module opposite to the display module.

[0023] Optionally, the display module low-temperature heating device further includes a first transparent conductive layer and a second transparent conductive layer;

[0024] The first transparent conductive layer is disposed on the side of the color filter substrate of the display module near the cover plate, and the second transparent conductive layer is disposed on the side of the array substrate of the display module away from the cover plate.

[0025] Secondly, embodiments of the present invention also provide a low-temperature heating driving method, which is used to drive the low-temperature heating device for display modules described in any embodiment of the present invention;

[0026] The driving method includes:

[0027] The control module controls the power module to provide power to the conveying module based on the temperature of the display module detected by the temperature detection module, so that the conveying module transports the heating module so that the heating module wraps around the display module or is gathered into the gathering module;

[0028] The control module controls the heating state of the heating module based on the temperature of the display module detected by the temperature detection module.

[0029] Thirdly, embodiments of the present invention also provide a display system, which includes a display module and a low-temperature heating device for the display module as described in any embodiment of the present invention.

[0030] The low-temperature heating device, low-temperature heating driving method, and display system for display modules provided in this invention, with their heating module, conveying module, retracting module, and power module under the control of the control module, can perform enveloping heating on the display module when its temperature is too low. This effectively and quickly removes frost from the display screen in low-temperature and humid environments, allowing the display module to display and be viewed normally. Enveloping heating of the display module achieves heating while isolating it from the external environment, preventing heat convection due to temperature differences between the inside and outside of the display module, thus solving the problem of cracking caused by temperature differences during heating. Furthermore, enveloping heating increases the heating area of ​​the display module, thereby improving its heating speed. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the electrical connection structure of a low-temperature heating device for a display module provided in an embodiment of the present invention;

[0033] Figure 2 This is a top view of a partial display module low-temperature heating device provided in an embodiment of the present invention, from the display module cover plate side;

[0034] Figure 3 for Figure 2 A cross-sectional view cut along the dashed line AA';

[0035] Figure 4 This is a schematic diagram of the electrical connection structure of another display module low-temperature heating device provided in an embodiment of the present invention;

[0036] Figure 5 For another Figure 2 A cross-sectional view cut along the dashed line AA';

[0037] Figure 6 for Figure 5 A partial structural diagram of a heating module with an insulation layer.

[0038] Figure 7 For another Figure 2 A cross-sectional view cut along the dashed line AA';

[0039] Figure 8 This is a schematic flowchart of a low-temperature heating driving method provided in an embodiment of the present invention. Detailed Implementation

[0040] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0041] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0042] Figure 1 This is a schematic diagram of the electrical connection structure of a low-temperature heating device for a display module provided in an embodiment of the present invention. Figure 2 This is a top view of a partial display module low-temperature heating device provided in an embodiment of the present invention, from the display module cover plate side. Figure 3 for Figure 2 A cross-sectional view cut along the dotted line AA' shows that the display module's low-temperature heating device includes a heating module 110, a conveying module 120, a gathering module 130, a power module 140, and a control module 150.

[0043] The transmission module 120 is disposed on the first edge side, the second edge side, and the side away from the display screen of the display module 200. The first edge side and the second edge side are any two opposite edges of the display module 200, and the side away from the display screen is the side of the display module 200 that is away from the cover plate 220.

[0044] The temperature detection module 210, power module 140, and heating module 110 of the display module 200 are all connected to the control module 150. The conveying module 120 is connected to the power module 140. The control module 150 is used to control the power module 140 to provide power to the conveying module 120 according to the temperature of the display module 200 detected by the temperature detection module 210, so that the conveying module 120 conveys the heating module 110, so that the heating module 110 wraps around the display module 200 or is gathered in the gathering module 130. The control module 150 is also used to control the heating state of the heating module 110 according to the temperature of the display module 200 detected by the temperature detection module 210.

[0045] The control module 150 is the core control unit for the entire display module's low-temperature heating device. It analyzes the display module 200's temperature based on the temperature detected by the temperature detection module 210 and adjusts the coordinated operation of the other modules accordingly. The power module 140 provides power to the conveying module 120, enabling it to move the heating module 110 to a designated position. When the display module 200 needs heating, the conveying module 120 can transport the heating module 110 to the outside of the entire display module 200 to enclose it. Additionally, when the display module 200 is fully heated or no longer needs heating, the power module 140 can move the heating module 110 around the gathering module 130 for safekeeping. The heating module 110 converts electrical energy into heat to supply heat to the display module 200.

[0046] The display module 200 is, for example, an LCD screen used in low-temperature and humid environments such as an electronic rearview mirror, vehicle display, and outdoor display. The temperature detection module 210 is configured, for example, to be located inside the display module 200 and electrically connected to the control module 150 for interaction. In other embodiments, the temperature detection module 210 may also be located between the display module 200 and the display module's low-temperature heating device, and electrically connected to the control module 150 for interaction. No specific limitations are imposed here.

[0047] Based on the above connection relationships and Figure 2 and Figure 3 The installation location of the low-temperature heating device for the display module is described, along with its operation: When the display module 200 is started, the temperature detection module 210 monitors the temperature of the display module 200 in real time and transmits the detected temperature to the control module 150. The control module 150 can analyze the specific situation of the display module 200 based on its temperature and adjust the coordinated operation of the other modules accordingly.

[0048] If the display module temperature is within the heating temperature threshold range, and the heating module 110 is wrapped around the gathering module 130, the control module 150 will control the power module 140 to provide the first power to the conveying module 120. Driven by this first power, the conveying module 120 can then transport the heating module 110 to the outside of the entire display module 200, so that the entire display module 200 is enveloped by the heating module 110. After the heating module 110 envelops the entire display module 200, it isolates the display module 200 from the external environment. The control module 150 then controls the heating module 110 to convert electrical energy into heat energy to heat the entire display module 200. At this time, the display module 200 is enclosed within the space of the heating module 110, preventing heat convection between the inside and outside of the display module 200, thus solving the problem of the display module 200 cracking due to overheating. After the display module 200 has finished heating, the control module 150 will control the power module 140 to provide a second power to the transmission module 120. At this time, the transmission module 120, driven by the second power, will drive the heating module 110 to wrap around the gathering module 130 to store the heating module 110.

[0049] If the display module temperature is within the heating temperature threshold range, and the heating module 110 is wrapped around the display module 200, the control module 150 controls the heating module 110 to convert electrical energy into heat energy, so that the heating module 110 heats the entire display module 200. After the display module 200 is heated, the control module 150 controls the power module 140 to provide a second power to the conveying module 120. At this time, driven by the second power, the conveying module 120 drives the heating module 110 to wrap around the gathering module 130 to store the heating module 110.

[0050] If the displayed module temperature is outside the heating temperature threshold range, and the heating module 110 is wrapped around the gathering module 130, the display module low-temperature heating device will not start.

[0051] If the temperature of the display module is not within the heating temperature threshold range, and the heating module 110 is wrapped around the display module 200, the control module 150 will control the power module 140 to provide a second power to the transmission module 120. At this time, the transmission module 120, driven by the second power, will drive the heating module 110 to wrap around the gathering module 130 to store the heating module 110.

[0052] It should be noted that the direction of operation of the transmission module 120 under the first power is opposite to the direction of operation of the transmission module 120 under the second power.

[0053] The low-temperature heating device for display modules provided in this embodiment of the invention, comprising a heating module 110, a conveying module 120, a gathering module 130, and a power module 140, under the control of a control module 150, can perform enveloping heating on the display module 200 when its temperature is too low. This effectively and quickly removes frost from the display screen of the display module 200 in low-temperature and humid environments, allowing the display module 200 to display and be viewed normally. Enveloping heating of the display module achieves heating of the display module 200 while isolating it from the external environment, preventing heat convection due to temperature differences between the inside and outside of the display module 200, thus solving the problem of cracking caused by temperature differences during heating. Furthermore, enveloping heating increases the heating area of ​​the display module 200, thereby improving its heating speed.

[0054] Based on the above embodiments, optionally, Figure 4 This is a schematic diagram of the electrical connection structure of another display module low-temperature heating device provided in an embodiment of the present invention. (Continue to refer to...) Figure 2 and Figure 4 The heating module 110 includes a first heating unit 111 and a second heating unit 112; the conveying module 120 includes a first conveying unit 121 and a second conveying unit 122; the gathering module 130 includes a first gathering unit 131 and a second gathering unit 132; and the power module 140 includes a first power unit 141 and a second power unit 142.

[0055] The first transmission unit 121 is disposed on the first edge side 201 of the display module 200 and half of the area on the side away from the display screen near the first edge side; the first retracting unit 131 is disposed on the first edge side of the display module 200;

[0056] Both the first power unit 141 and the first heating unit 111 are connected to the control module 150. The control module 150 is used to control the operating state of the first power unit 141 and the heating state of the first heating unit 111 according to the temperature of the display module. The first conveying unit 121 is connected to the first power unit 141. The first conveying unit 121 is used to convey the first heating unit 111 so that the first heating unit 111 wraps around half of the display module 200 near the first edge or is gathered in the first gathering unit 131.

[0057] The second transmission unit 122 is disposed on the second edge side of the display module 200 and half of the area on the side away from the display screen that is close to the second edge side; the second gathering unit 132 is disposed on the second edge side of the display module 200.

[0058] The second power unit 142 and the second heating unit 112 are both connected to the control module 150. The control module 150 is used to control the operating state of the second power unit 142 and the heating state of the second heating unit 112 according to the temperature of the display module. The second conveying unit 122 is connected to the second power unit 142. The second conveying unit 122 is used to convey the second heating unit 112 so that the second heating unit 112 wraps around half of the display module 200 near the second edge or is gathered in the second gathering unit 132.

[0059] The first conveying unit 121 delivers the first heating unit 111 via two paths: a first path delivers the first heating unit 111 to the half of the cover plate 220 of the display module 200 near the first edge; the second path delivers the first heating unit 111 to both the half of the cover plate 220 and the half of the cover plate 220 away from the display screen, also near the first edge. The first retracting unit 131 includes a first roll, capable of simultaneously outputting or retracting the first heating units 111 from both paths, thus ensuring that the first conveying unit 121 can simultaneously deliver the first heating units 111 from different paths. Furthermore, the first heating units 111 delivered by the first conveying unit 121 along both paths are of the same length (the first edge is very thin and can be disregarded; see the display module 200 of ultra-thin mobile phones, tablets, and other electronic products for examples). The first power unit 141 includes a first motor, which converts electrical energy into kinetic energy to drive the first conveying unit 121 to deliver the first heating unit 111. The direction in which the first conveying unit 121 delivers the first heating unit 111 to wrap around the display module 200 or to gather it into the first gathering unit 131 is determined by the rotation direction of the first motor. For example, if the first motor rotates forward to provide kinetic energy to the first conveying unit 121, it can deliver the first heating unit 111 to wrap around the display module 200; if the first motor rotates in reverse to provide kinetic energy to the first conveying unit 121, it can deliver the first heating unit 111 to gather it into the first gathering unit 131.

[0060] Similarly, the path for the second heating unit 112 to transport the second heating unit 112 is also divided into two paths. The first path transports the second heating unit 112 to the half-area of ​​the cover plate 220 of the display module 200 near the second edge. The second path transports the second heating unit 112 to the half-area of ​​the second edge side and the side away from the display screen near the second edge. The second retracting unit 132 includes a second spool. The second retracting unit 132 can simultaneously output or retract the first heating units 111 on both paths, thereby ensuring that the second conveying unit 122 can simultaneously transport the second heating units 112 on different paths. In addition, the length of the second heating units 112 transported by the two paths of the second conveying unit 122 is the same (wherein, the second edge side is very thin and can be ignored; for details, refer to the display module 200 of ultra-thin mobile phones, tablets, and other electronic products). The second power unit 142 includes a second motor, which can convert electrical energy into kinetic energy to drive the second conveying unit 122 to transport the second heating unit 112. Whether the second conveying unit 122 delivers the second heating unit 112 to wrap around the display module 200 or to gather it into the second gathering unit 132 is determined by the rotation direction of the second motor. For example, if the second motor rotates forward to provide kinetic energy to the second conveying unit 122, it can deliver the second heating unit 112 to wrap around the display module 200; if the second motor rotates in reverse to provide kinetic energy to the second conveying unit 122, it can deliver the second heating unit 112 to gather it into the second gathering unit 132.

[0061] Based on the above embodiments, alternatively, refer to the following: Figure 3 The first conveying unit 121 includes a plurality of first conveying shafts 1211 and a first conveyor belt 1212;

[0062] The first conveyor shaft 1211 is disposed on the first edge side and half of the area near the first edge side away from the display screen side. The first conveyor belt 1212 is disposed on the first conveyor shaft 1211 and the first power unit 141. The first end of the first heating unit 111 is fixed to the first conveyor belt 1212.

[0063] Specifically, in order to enable the first conveyor belt 1212 to effectively and quickly transport the first heating unit 111, the first end of the first heating unit 111 is fixed to the first conveyor belt 1212. The position where the first end of the first heating unit 111 is fixed to the first conveyor belt 1212 is the position where the first fixed end of the first heating unit 111 contacts the first conveyor belt 1212 when the first heating unit 111 is gathered into the first gathering unit 131.

[0064] Based on the above embodiments, alternatively, refer to the following: Figure 3 The second conveying unit 122 includes a plurality of second conveying shafts 1221 and a second conveyor belt 1222;

[0065] The second conveyor shaft 1221 is disposed on the second edge side and half of the area near the second edge side away from the display screen side. The second conveyor belt 1222 is disposed on the second conveyor shaft 1221 and the second power unit 142. The first end of the second heating unit 112 is fixed to the second conveyor belt 1222.

[0066] Specifically, in order to enable the second conveyor belt 1222 to effectively and quickly transport the second heating unit 112, the first end of the second heating unit 112 is fixed to the second conveyor belt 1222. The position where the first end of the second heating unit 112 is fixed to the second conveyor belt 1222 is the position where the first fixed end of the second heating unit 112 contacts the second conveyor belt 1222 when the second heating unit 112 is gathered into the second gathering unit 132.

[0067] Based on the above embodiments, alternatively, refer to the following: Figure 2 and Figure 3 The display module low-temperature heating device also includes a conveyor rail 160 and a rail slider 170;

[0068] The conveying track 160 is disposed in the first frame area and the second frame area opposite to the cover plate 220 of the display module 200, and the conveying track 160 extends toward the first edge side and the second edge side; the track slider 170 is disposed in the conveying track 160.

[0069] The track slider 170 is connected to the second end of the first heating unit 111 and the second end of the second heating unit 112. The track slider 170 is used to fix the heating module 110 and drive the heating module 110 to move along the fixed track to cover the cover plate 220 of the display module 200.

[0070] The first heating unit 111 includes a plurality of first resistance wires, the extension direction of which is perpendicular to the conveying track 160; the second heating unit 112 includes a plurality of second resistance wires, the extension direction of which is perpendicular to the conveying track 160.

[0071] Multiple first resistance wires are arranged in a row and connected or bonded with conductive material to form a first heating unit 111. The first heating unit 111 is folded once and then wrapped around a first gathering unit 131. The first resistance wire folded at the top covers the cover plate of the display module 200, and the first resistance wire folded at the bottom covers the outer side of the display module 200 corresponding to the first edge side and the half-area opposite to the display screen side near the first edge side. Multiple second resistance wires are arranged in a row and connected or bonded with conductive material to form a second heating unit 112. The second heating unit 112 is folded once and then wrapped around a second gathering unit 132. The second resistance wire folded at the top covers the cover plate of the display module 200, and the second resistance wire folded at the bottom covers the outer side of the display module 200 corresponding to the second edge side and the half-area opposite to the display screen side near the second edge side.

[0072] Furthermore, the contact point between the folded-up, outermost first resistance wire and the conveyor track 160 of the first and second frame areas serves as the second end of the first heating unit 111. That is, the contact point between the folded-up, outermost first resistance wire and the conveyor track 160 of the first and second frame areas is connected to a track slider 170. When the first conveyor belt 1212 transports the first heating unit 111 to cover the display module 200 cover plate 220 or to the first retracting unit 131, the first conveyor belt 1212 transmits the pushing force to the track slider 170 through the folded-up first resistance wire. This allows the slider to overcome the friction between the slider and the conveyor track 160 and run on the track, indicating the direction of the folded-up first resistance wire's movement and preventing deviation during its laying or retraction.

[0073] Similarly, the contact point between the folded-up, outermost second resistance wire and the conveyor track 160 of the first and second frame areas serves as the second end of the second heating unit 112. That is, the contact point between the folded-up, outermost second resistance wire and the conveyor track 160 of the first and second frame areas is connected to a track slider 170. When the second conveyor belt 1222 transmits the first heating unit 111 to cover the display module 200 cover plate 220 or to the second retracting unit 132, the second conveyor belt 1222 transmits the pushing force to the track slider 170 through the folded-up second resistance wire. This allows the slider to overcome the friction between the slider and the conveyor track 160 and run on the track, indicating the direction of the folded-up second resistance wire's movement and preventing deviation during its laying or retraction.

[0074] Based on the above embodiments, optionally, the lengths of the first resistance wire and the second resistance wire are greater than or equal to the distance between the edges of the first edge region and the edges of the second edge region of the cover plate 220.

[0075] Specifically, when the lengths of the first and second resistance wires are equal to the distance between the edges of the first and second edge regions of the cover plate 220, the edge side of the display module 200 near the conveyor track 160 is not covered by resistance wires, and therefore the edge side of the display module 200 near the conveyor track 160 will not be heated. However, since the thickness of the display module 200 is relatively small, the area of ​​the edge side of the display module 200 near the conveyor track 160 is relatively small, so it will not affect the heating of the entire display module 200 and can be ignored.

[0076] When the length of the first resistance wire and the second resistance wire is greater than the distance between the edge of the first edge area and the edge of the second edge area of ​​the cover plate 220, the two ends of the first resistance wire and the second resistance wire of the cover plate 220 will bend downward under the influence of gravity, thereby covering the edge side of the display module 200 near the conveying track 160 and heating the edge side of the display module 200 near the conveying track 160.

[0077] Based on the above embodiments, optionally, Figure 5 For another Figure 2 A cross-sectional view cut along the dashed line AA'. Figure 6 for Figure 5 A partial structural diagram of a heating module with an insulation layer of 180mm is shown. Figure 5 and Figure 6 As shown, the display module low-temperature heating device also includes a heat insulation layer 180; the heat insulation layer 180 is disposed on the side of the heating module 110 away from the display module 200.

[0078] The thermal conductivity of the insulation layer 180 is less than or equal to 0.12. When the heating module 110 heats the display module 200, the insulation layer 180 prevents heat loss from the resistance wire and improves the heating efficiency of the heating module 110 on the display module 200. Furthermore, when the display module 200 is not in use, the control module 150 can control the power module 140 to provide power to the transmission module 120, causing the transmission module 120 to transport the heating module 110 to the outside of the entire display module 200, thus enveloping the entire display module 200 and providing insulation.

[0079] Based on the above embodiments, optionally, Figure 7 For another Figure 2 A cross-sectional view cut along the dashed line AA'. (See attached image.) Figure 7 As shown, the display module low-temperature heating device also includes a first transparent conductive layer 191 and a second transparent conductive layer 192;

[0080] The first transparent conductive layer 191 is disposed on the side of the color filter substrate of the display module 200 near the cover plate 220, and the second transparent conductive layer 192 is disposed on the side of the array substrate of the display module 200 away from the cover plate 220.

[0081] By utilizing the resistive heating effect of the first transparent conductive layer 191 and the second transparent conductive layer 192, electrical energy can be efficiently converted into heat energy, thereby achieving the purpose of heating the interior of the display module 200 without affecting the transparency of the glass, and further improving the heating rate of the display module 200.

[0082] For this case, an exemplary example of the time required for the resistance wire to heat from -40℃ to 0℃ is as follows (taking a 7-inch display module as an example: 16*10*7cm; heating volume: 20*13*10cm).

[0083] The voltage is 24V; the glass volume is approximately 0.0000945m³. 3 The display module has a volume of approximately 0.00112 m³. 3 The display module cavity volume is 0.0026m³. 3 Polyethylene terephthalate (PET) density: 1.18 x 1000 kg / m³ 3 PET specific heat capacity: 1.1 kJ / kg℃; resistance wire length approximately: 0.2, 0.13, 0.1 m; resistance of 0.1 mm diameter resistance wire (e.g., Cr30Ni70) is 150.2 Ω / m; air specific heat capacity: C = 1.004 kJ / kg℃; air density: 1.29 kg / m³ 3 Specific heat capacity of glass C = 1.424 kJ / kg℃; Density of glass: 2.5 × 1000 kg / m³ 3 Al density: 2.7*1000kg / m³ 3 Specific heat capacity of AL (Al₂O₃) C = 0.88 kJ / kg℃; AL backplate: 0.04 kg; PET film: 0.06 kg; Air volume of display module cavity: 0.000958 m³ 3 .

[0084] The heating amount of the resistance wire in 1 second is approximately: Q = UU / R*t = 174 J / s ≈ 0.174 kJ / s

[0085] The thermal energy required to raise the air temperature of all chambers from -40℃ to 0℃ is approximately:

[0086] Q=CMT=1.29*1.004*40*(0.0026-0.00112+0.000958)≈0.126Kj;

[0087] The display module requires approximately the following thermal energy to operate from -40℃ to 0℃:

[0088] Q=1.18*1000*1.1**40*0.06 / 1180+2.7*1000*0.88*40*0.04 / 2700≈4.05Kj;

[0089] The heat energy required for glass to decrease from -40℃ to 0℃ is approximately: Q=2500*1.424*40*0.0000945≈13.46KJ;

[0090] The required heating time is approximately: (0.126 + 4.05 + 13.46) / 0.174 ≈ 102 seconds;

[0091] It is expected to heat from -40℃ to above 0℃ within 2 minutes to ensure the normal start-up of the LCM;

[0092] ②The temperature can be raised to approximately 24℃ within 1 minute by: 0.174*60 / (0.126+4.05+13.46) / 40;

[0093] The temperature difference is: -40 + 24 = -16℃.

[0094] The LCD screen typically operates at a temperature of 0℃-50℃; its wide operating temperature range is -20℃-70℃; and its extreme temperature range is -40℃-90℃. Based on the above, this heating program is expected to heat the screen to the wide operating temperature within 1 minute, alleviating the LCD display delay phenomenon; and reach the normal operating temperature within 2 minutes to ensure the normal startup of the display module.

[0095] Figure 8 This is a schematic flowchart of a low-temperature heating driving method provided in an embodiment of the present invention, as shown below. Figure 8 As shown, this low-temperature heating driving method is used to drive the low-temperature heating device for the display module provided in any embodiment of the present invention;

[0096] This driving method specifically includes:

[0097] S110: The control module controls the power module to provide power to the conveying module based on the temperature of the display module detected by the temperature detection module, so that the conveying module transports the heating module, so that the heating module wraps around the display module or is gathered into the gathering module.

[0098] If the display module temperature is within the heating temperature threshold range, the control module controls the power module to provide a first power to the conveying module, enabling the conveying module to transport the heating module to the outside of the entire display module, so that the entire display module is wrapped by the heating module. If the display module temperature is outside the heating temperature threshold range, the control module controls the power module to provide a second power to the conveying module, enabling the conveying module to drive the heating module to wrap around the gathering module for storage.

[0099] S120: The control module controls the heating status of the heating module based on the temperature of the display module detected by the temperature detection module.

[0100] If the display module temperature is within the heating temperature threshold range, the control module controls the heating module to heat the display module. If the display module temperature is outside the heating temperature threshold range, the control module controls the heating module to stop heating the display module.

[0101] The low-temperature heating driving method provided in this invention allows the control module to control the conveying module to transport the heating module to the outside of the entire display module when the display module temperature is too low. This envelops the entire display module in heating, effectively and quickly removing frost from the display screen in low-temperature and humid environments, ensuring normal display and viewing. Enveloping the display module also allows heating while isolating it from the external environment, preventing heat convection due to temperature differences between the inside and outside of the module, thus solving the problem of cracking caused by temperature differences during heating. Furthermore, enveloping the display module increases the heating area, thereby improving the heating speed.

[0102] In another embodiment, when the display module low-temperature heating device is applied to an automotive electronic rearview mirror, if the key fob power is detected to be activated, the key signal will power on the program, causing the display module's temperature sensor to automatically detect the display module's temperature. If the display module temperature is within the heating temperature threshold range, the control module controls the power module to provide a first power to the transmission module, enabling the transmission module to transport the heating module to the outside of the entire display module, so that the entire display module is wrapped by the heating module. When the display module heating is complete, the temperature sensor will stop working, and the power module will drive the heating module to wrap around the folding module for storage. The display module low-temperature heating device will not be activated again until the next key signal is received.

[0103] This invention also provides a display system, which includes a display module and a low-temperature heating device for the display module provided in any embodiment of this invention. Therefore, it has the beneficial effects of the low-temperature heating device for the display module provided in this solution, which will not be elaborated here.

[0104] The display system can be applied to electronic products in low-temperature and humid environments, such as electronic rearview mirrors, vehicle displays, and outdoor displays.

[0105] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0106] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A low-temperature heating device for a display module, characterized in that, It includes a heating module, a conveying module, a gathering module, a power module, and a control module; The transmission module is disposed on the first edge side, the second edge side, and the side away from the display screen of the display module. The first edge side and the second edge side are any two opposite edges of the display module, and the side away from the display screen is the side of the display module away from the cover plate. The temperature detection module, power module, and heating module of the display module are all connected to the control module. The transmission module is connected to the power module. The control module is used to control the power module to provide power to the transmission module according to the temperature of the display module detected by the temperature detection module, so that the transmission module transports the heating module so that the heating module wraps around the display module or is gathered into the gathering module. The control module is also used to control the heating state of the heating module according to the temperature of the display module detected by the temperature detection module.

2. The display module low-temperature heating device according to claim 1, characterized in that, The heating module includes a first heating unit and a second heating unit; the conveying module includes a first conveying unit and a second conveying unit; the gathering module includes a first gathering unit and a second gathering unit; the power module includes a first power unit and a second power unit. The first transmission unit is disposed on the first edge side of the display module and half of the side facing away from the display screen near the first edge side; the first retracting unit is disposed on the first edge side of the display module; Both the first power unit and the first heating unit are connected to the control module. The control module is used to control the operating state of the first power unit and the heating state of the first heating unit according to the temperature of the display module. The first conveying unit is connected to the first power unit and is used to convey the first heating unit so that the first heating unit wraps around half of the display module near the first edge or is gathered into the first gathering unit. The second transmission unit is disposed on the second edge side of the display module and half of the side facing away from the display screen near the second edge side; the second retracting unit is disposed on the second edge side of the display module. The second power unit and the second heating unit are both connected to the control module. The control module is used to control the operating state of the second power unit and the heating state of the second heating unit according to the temperature of the display module. The second conveying unit is connected to the second power unit and is used to convey the second heating unit so that the second heating unit wraps around half of the display module near the second edge or is gathered into the second gathering unit.

3. The display module low-temperature heating device according to claim 2, characterized in that, The first conveying unit includes multiple first conveying shafts and a first conveyor belt; The first conveyor shaft is disposed on the first edge side and the half area of ​​the side away from the display screen near the first edge side. The first conveyor belt is disposed on the first conveyor shaft and the first power unit. The first end of the first heating unit is fixed to the first conveyor belt.

4. The display module low-temperature heating device according to claim 2, characterized in that, The second conveying unit includes multiple second conveying shafts and a second conveyor belt; The second conveyor shaft is disposed on the second edge side and half of the area of ​​the side facing away from the display screen near the second edge side. The second conveyor belt is disposed on the second conveyor shaft and the second power unit. The first end of the second heating unit is fixed to the second conveyor belt.

5. The display module low-temperature heating device according to claim 2, characterized in that, It also includes a conveyor track and track sliders; The conveying track is disposed in the first and second frame areas opposite to the display module cover plate, and the conveying track extends toward the first edge side and the second edge side; the track slider is disposed within the conveying track; The track slider is connected to the second end of the first heating unit and the second end of the second heating unit. The track slider is used to fix the heating module and drive the heating module to move along the fixed track to cover the cover plate of the display module.

6. The display module low-temperature heating device according to claim 5, characterized in that, The first heating unit includes a plurality of first resistance wires, the extension direction of which is perpendicular to the conveying track; The second heating unit includes a plurality of second resistance wires, the extension direction of which is perpendicular to the conveying track.

7. The display module low-temperature heating device according to claim 1, characterized in that, It also includes the insulation layer; The insulation layer is located on the side of the heating module opposite to the display module.

8. The display module low-temperature heating device according to claim 1, characterized in that, It also includes a first transparent conductive layer and a second transparent conductive layer; The first transparent conductive layer is disposed on the side of the color filter substrate of the display module near the cover plate, and the second transparent conductive layer is disposed on the side of the array substrate of the display module away from the cover plate.

9. A low-temperature heating driving method, characterized in that, Used to drive the low-temperature heating device for the display module according to any one of claims 1-8; The driving method includes: The control module controls the power module to provide power to the conveying module based on the temperature of the display module detected by the temperature detection module, so that the conveying module transports the heating module so that the heating module wraps around the display module or is gathered into the gathering module; The control module controls the heating state of the heating module based on the temperature of the display module detected by the temperature detection module.

10. A display system, characterized in that, Includes a display module and a low-temperature heating device for the display module as described in any one of claims 1-8.

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