An LCM liquid crystal display module and its display screen

Abstract

The present invention relates to display technology, and discloses an LCM liquid crystal display module, which is composed of at least three groups of display components and an output screen. The display component includes a backlight source, a light beam controller, and a color filter. A accommodating cavity is provided inside the light beam controller, and a liquid crystal is encapsulated in the cavity. A fixed vertical polarizer and a rotatable horizontal polarizer are respectively provided at both ends of the accommodating cavity. The horizontal polarizer is connected to a first controller, and the liquid crystal is connected to a second controller. The second controller applies an initial working voltage to the liquid crystal. When the ambient temperature changes, the second controller applies a compensation threshold voltage to the liquid crystal according to the real-time temperature. Dynamically adjusting the voltage applied to the liquid crystal ensures that it is always in the best working state, which can effectively offset the molecular arrangement disorder caused by temperature changes, thereby maintaining the consistency of image quality. The present invention also discloses a display screen, which is composed of multiple LCM liquid crystal display modules.

Description

Technical Field

[0001] The present invention relates to display technology, and in particular to an LCM liquid crystal display module and a display screen thereof. Background Art

[0002] LCM (LCD Module) is a liquid crystal display module or liquid crystal module. Although LCM liquid crystal display modules excel in many aspects, their shortcomings significantly affect their scope of use and display effects.

[0003] The alignment of liquid crystal molecules in LCM (Liquid Crystal Module) display modules is significantly affected by temperature. At high temperatures, the molecules may become disordered, resulting in blurry displays or color distortion. At low temperatures, the fluidity of the molecules decreases, potentially affecting display stability and response speed. This limits the application of LCM modules in certain environments.

[0004] Existing technology, such as Chinese patent application CN117970692A, proposes an LCM display module and its LCM display screen. This patent employs a heat-conducting plate on the back of the display, combined with an air duct to dissipate heat. However, relying solely on air ducts to dissipate heat does not directly affect the liquid crystal, resulting in blurry displays or color distortion. Therefore, further improvements are needed in this technology. Summary of the Invention

[0005] Based on the above technical problems, the present invention proposes an LCM liquid crystal display module and a display screen thereof.

[0006] The technical solution of the present invention is achieved as follows:

[0007] An LCM liquid crystal display module, consisting of at least three groups of display components and an output screen, wherein the display components include a backlight source, a beam controller and a color filter;

[0008] The beam controller is provided with a cavity inside which a liquid crystal is encapsulated. A fixed vertical polarizer and a rotatable horizontal polarizer are provided at both ends of the cavity. The horizontal polarizer is connected to the first controller, and the liquid crystal is connected to the second controller.

[0009] The second controller applies an initial operating voltage to the liquid crystal to deflect the light beam passing through by 90°, and the first controller controls the horizontal polarizer to control the rotation angle to modulate the light intensity;

[0010] When the ambient temperature changes, the second controller applies a compensation threshold voltage to the liquid crystal according to the real-time temperature.

[0011] In the present invention, a plurality of permanent magnets are installed around the horizontal polarizer, and the permanent magnets are alternately distributed with N poles and S poles;

[0012] The first controller applies a magnetic field around the horizontal polarizer to control the rotation of the horizontal polarizer.

[0013] In the present invention, the second controller includes an input unit and a sensing unit. The sensing unit includes a temperature sensor for monitoring the real-time temperature of the liquid crystal. The input unit sets a reference threshold voltage of the liquid crystal at room temperature. A reference model of a threshold voltage varying with real-time temperature is established, which is expressed as:

[0014]

[0015] Among them, the real-time temperature is represented by T, and the reference threshold voltage is represented by V th , represents the threshold voltage that varies with temperature, Indicates the reference threshold voltage, usually the nominal value at room temperature, represents the temperature-dependent elastic constant of the liquid crystal, represents the dielectric anisotropy temperature function.

[0016] In the present invention, the dielectric anisotropy temperature function is expressed as:

[0017] , Indicates T i Dielectric anisotropy reference value at temperature, T c represents the critical point of liquid crystal phase transition, Represents the dielectric attenuation index.

[0018] In the present invention, according to a certain threshold voltage V i , reference threshold voltage And the initial working voltage V0, calculate the compensation threshold voltage V ap , which is then input to the liquid crystal by the execution unit, where the calculation formula is as follows:

[0019]

[0020] in, It is the voltage margin factor, which is used to offset device aging and environmental interference.

[0021] In the present invention, the second controller is connected to the PID controller, and the second controller includes an input unit and a sensing unit. The sensing unit includes a temperature sensor for monitoring the real-time temperature of the liquid crystal.

[0022] The PID controller receives the temperature feedback signal from the sensing unit, calculates the control output power based on the deviation between the set temperature and the real-time temperature, and controls the heating device or the cooling device.

[0023] In the present invention, the heating device is a thin film heating plate, and the cooling device is a semiconductor cooling plate.

[0024] In the present invention, a heat balance model is established as follows:

[0025]

[0026] in, represents heat capacity, Indicates the output power, represents the thermal dissipation coefficient, Indicates the real-time temperature, which is monitored by the temperature sensor in real time. Indicates the ambient temperature.

[0027] In the present invention, the feedback control of the PID controller is expressed in combination with the thermal balance model as follows:

[0028]

[0029] in, represents the output power of the PID controller at time t, represents the proportional term, represents the integral term, represents the differential term, Represents the temperature error, that is , Indicates the set temperature.

[0030] A display screen is characterized by being composed of a plurality of LCM liquid crystal display modules.

[0031] The LCM liquid crystal display module and display screen thereof according to the present invention have the following beneficial effects:

[0032] 1. A magnetic field-driven rotatable horizontal polarizer effectively overcomes the temperature-sensitive effects of liquid crystal materials, which can lead to response lag, contrast reduction, and color distortion. This maintains stable light intensity modulation regardless of high or low temperatures, significantly improving the display's reliability and lifespan in complex environments.

[0033] 2. The present invention sets a second controller, combines the real-time temperature data collected by the sensing unit, and uses the established voltage-temperature model and compensation voltage algorithm to dynamically adjust the voltage applied to the liquid crystal to ensure that it is always in the best working state. It can effectively offset the molecular arrangement disorder caused by temperature changes, thereby maintaining the consistency of image quality.

[0034] 3. This invention establishes a thermal equilibrium model for the liquid crystal by connecting the heating / cooling device via a PID controller, achieving closed-loop control of the liquid crystal temperature. By adjusting the output power of the thin-film heater and semiconductor cooling element, the liquid crystal is always maintained within a set ideal operating temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the structure of the display screen of the present invention;

[0036] Figure 2 A schematic structural diagram of an LCM liquid crystal display module of the present invention;

[0037] Figure 3 Schematic diagram of another structure of the LCM liquid crystal display module of the present invention;

[0038] Figure 4 for Figure 3 Schematic diagram of explosion separation structure;

[0039] Figure 5 is a structural block diagram of the second controller of the present invention;

[0040] Figure 6 is another structural block diagram of the second controller of the present invention;

[0041] The reference numerals indicate:

[0042] Display screen 100, bottom plate 101, screen 102, connecting line 103, LCM liquid crystal display module 200, first display component 21, second display component 22, third display component 23, integrated output screen 24, backlight source 201, vertical polarizer 202, liquid crystal 203, horizontal polarizer 204, color filter 205,

[0043] LCM liquid crystal display module 300 , backlight source 31 , beam controller 32 , accommodating cavity 321 , liquid crystal 322 , vertical polarizer 323 , horizontal polarizer 324 , permanent magnet 324A, first controller 325 , second controller 326 , color filter 33 . DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0045] Reference Figure 1 As shown, the present invention provides a display screen 100 , which includes a base plate 101 , a screen 102 and connecting lines 103 . The screen 102 is composed of a plurality of LCM liquid crystal display modules 200 .

[0046] Reference Figure 2 As shown, the LCM liquid crystal display module 200 includes a first display component 21, a second display component 22, a third display component 23 and an integrated output screen 24. The first display component 21, the second display component 22 and the third display component 23 have the same structure and display the three primary colors of red, green and blue respectively.

[0047] The display assembly includes a backlight 201, a vertical polarizer 202, a liquid crystal 203, a horizontal polarizer 204, and a color filter 205. The color filter 205 displays the three primary colors of red, green, and blue. Light from the backlight 201 passes through the vertical polarizer 202, retaining only the vertical component before entering the liquid crystal 203, which adjusts the deflection angle of the light.

[0048] It should be noted that the liquid crystal 203 is equipped with a controller that applies voltage to the liquid crystal 203, causing the molecules within the liquid crystal 203 to change, thereby altering the angle of the incident light. When the incident light is deflected by 90°, it can completely pass through the horizontal polarizer 204. If the angle is less than 90°, the incident light is partially blocked. If the incident light is not deflected, it is completely blocked by the horizontal polarizer 204, thereby modulating the intensity of the light passing through. Finally, the image is displayed by the red, green, and blue color filters 205.

[0049] However, the material of the liquid crystal 203 is essentially a soft condensed matter with anisotropy between solid crystal and liquid. Its physical properties, especially the order and fluidity of molecular arrangement, are highly sensitive to ambient temperature.

[0050] Under high temperatures, the molecular thermal motion of liquid crystal 203 intensifies, increasing its kinetic energy. This partially overcomes the intermolecular forces that maintain the regular arrangement of the liquid crystal molecules, reducing the effectiveness of liquid crystal 203 in controlling light. This manifests itself in a significant decrease in contrast, reduced color saturation, and even blurry or distorted display. Under extreme temperatures, the liquid crystal material may even completely lose its anisotropy, transforming into an isotropic liquid, completely rendering the display inoperable.

[0051] Conversely, at low temperatures, the molecular thermal motion of liquid crystal 203 weakens, reducing its kinetic energy. This causes the viscosity of the liquid crystal material to increase dramatically, significantly decreasing its molecular mobility. At this point, the liquid crystal molecules' reorientation after applying an electric field becomes extremely sluggish. The direct consequence is a significantly slower display response, with severe streaking and image sticking in dynamic images, and even the inability to refresh in a timely manner.

[0052] Based on the above, further improvements are made to the LCM liquid crystal display module 200 .

[0053] Example 1

[0054] Reference Figures 3 and 4 As shown, in this embodiment, improvements are made to the existing technology, and an LCM liquid crystal display module 300 is proposed. The LCM liquid crystal display module 300 is composed of at least three groups of display components and an output screen. Among them, the display component is composed of a backlight source 31, a beam controller 32, and a color filter 33. The beam controller 32 includes a receiving cavity 321, and a liquid crystal 322 is arranged inside the receiving cavity 321. A vertical polarizer 323 and a horizontal polarizer 324 are respectively provided at both ends of the receiving cavity 321. The vertical polarizer 323 is fixedly installed at one end of the receiving cavity 321, and the horizontal polarizer 324 can rotate axially in the receiving cavity 321.

[0055] Among them, the existing technology is to directly apply an electric field on the liquid crystal 322. The liquid crystal 322 is easily affected by the external temperature, which causes the arrangement of molecules inside it to be disordered, affecting the display quality.

[0056] In this embodiment, a plurality of permanent magnets 324A are mounted around the horizontal polarizer 324, with alternating north and south poles. A first controller 325 is located at one end of the housing cavity 321, and a second controller 326 is located on the liquid crystal 322. The second controller 326 applies a constant voltage to the liquid crystal 322, which serves as the initial operating voltage. This deflects the light beam passing through the liquid crystal 322 by a fixed angle of 90°. The first controller 325 then applies a magnetic field around the horizontal polarizer 324, controlling its rotation to the desired angle and thereby modulating the intensity of the light passing through.

[0057] In this embodiment, a constant initial voltage is applied to the liquid crystal 322 to fix the light beam deflection at 90°. A permanent magnet 324A with alternating N / S poles is installed circumferentially on the horizontal polarizer 324, which is driven to rotate by a magnetic field, replacing the traditional direct application of an electric field control, thereby eliminating the temperature influence of the directly applied electric field on the liquid crystal.

[0058] Preferably, heat-insulating glass wool is provided between the accommodating cavity 321 and the liquid crystal body 322 to isolate the liquid crystal body 322 from the influence of external temperature.

[0059] In this embodiment, an LCM (liquid crystal display) module 300 is provided for improving the stability and anti-interference capabilities of conventional liquid crystal displays. The module consists of at least three display components and an output screen, each of which includes a backlight source 31, a beam controller 32, and a color filter 33. The beam controller 32 is a core component, housing a cavity 321 within which a liquid crystal 322 is encapsulated. A vertical polarizer 323 and a rotatable horizontal polarizer 324 are positioned at either end of the cavity. The vertical polarizer 323 is fixed, while the horizontal polarizer 324 is magnetically driven and rotated by multiple circumferentially distributed permanent magnets 324A (alternating north and south poles). In conventional technology, light deflection is typically controlled by directly applying an electric field to the liquid crystal 322. However, this is easily affected by external temperature, leading to disordered molecular arrangement and thus affecting display quality.

[0060] To address this issue, in this embodiment, a second controller 326 applies an initial operating voltage V0 to the liquid crystal 322, deflecting the passing light beam by 90°. A first controller 325 then applies a magnetic field around the horizontal polarizer 324, controlling its rotation angle to modulate the light intensity. Furthermore, insulating glass wool is placed between the chamber 321 and the liquid crystal 322 to effectively isolate the light from external temperature fluctuations. When the ambient temperature changes, the second controller 326 intervenes to provide compensation based on the real-time temperature T.

[0061] Among them, this embodiment is to replace the traditional liquid crystal deflection, dynamic voltage compensation control, and PID active temperature control with magnetic field-driven polarizer rotation, which is linked and coordinated, and has complementary functions. Specifically: First, the magnetic field drives the polarizer to rotate through the N / S pole alternating permanent magnet 324A installed circumferentially on the horizontal polarizer 324. The first controller 325 applies a magnetic field to drive its precise rotation, completely abandoning the traditional practice of modulating the transmittance by changing the electric field intensity applied to the liquid crystal 322 itself. Its core effect is to separate the sensitivity of the liquid crystal molecular arrangement to temperature from the light intensity modulation link. The liquid crystal 322 only operates under the constant initial voltage V0 applied by the second controller 326 to achieve a fixed 90° beam deflection, and the final modulation of the polarization state is completed by the physically rotating horizontal polarizer 324. This rotation process is essentially unaffected by the thermal motion of the liquid crystal molecules, significantly reducing the sensitivity of the display quality to temperature fluctuations from the source, and improving the response stability and life. Secondly, the dynamic voltage compensation control senses the liquid crystal temperature T in real time through the second controller 326, and calculates the compensation threshold voltage based on the model of the threshold voltage drift with temperature. , and dynamically applied to the liquid crystal 322, accurately offsetting the threshold voltage drift caused by temperature, ensuring that no matter how the ambient temperature changes, the light beam passing through the liquid crystal 322 is always stably deflected by 90°, providing a reliable optical basis for subsequent polarizer modulation.

[0062] Further, refer to Figures 5 and 6 As shown, the specific working principle of the second controller 326 in this embodiment includes the following:

[0063] The second controller 326 includes an input unit, a sensing unit, a calculation unit, and an execution unit. The input unit is used to input an initial operating voltage V0 to the liquid crystal 322, so that the light beam passing through the liquid crystal 322 is deflected by 90°. The sensing unit includes a temperature sensor for real-time monitoring of the real-time temperature T of the liquid crystal 322. The input unit also sets a reference threshold voltage V th , where a certain threshold voltage V is established i The reference model that changes with the real-time temperature T is expressed as:

[0064]

[0065] in, represents the threshold voltage that varies with temperature, Indicates the reference threshold voltage, usually the nominal value at room temperature, Indicates the elastic constant of liquid crystal related to temperature, usually 0.02~0.05 / ℃, represents the dielectric anisotropy temperature function.

[0066] in, , Indicates T i Dielectric anisotropy reference value at temperature, T c represents the critical point of liquid crystal phase transition, Indicates the dielectric attenuation index, usually 0.2~0.3.

[0067] In this embodiment, the calculation unit is based on a certain threshold voltage V i , reference threshold voltage And the initial working voltage V0, calculate the compensation threshold voltage V ap , which is then input to the liquid crystal by the execution unit, where the calculation formula is as follows:

[0068]

[0069] in, is the voltage margin factor, ranging from 1.1 to 1.3, to compensate for device aging and environmental interference. Finally, the execution unit applies this compensation voltage to the liquid crystal 322, ensuring it always operates optimally. This significantly improves the stability and display quality of the LCD module in complex environments, making it suitable for industrial equipment, outdoor displays, and long-term operation scenarios requiring high display performance.

[0070] In this embodiment, the inner wall of the accommodating cavity 321 is filled or coated with a heat-insulating glass wool layer, which effectively blocks the direct influence of the external ambient temperature fluctuation on the liquid crystal 322 encapsulated therein.

[0071] The calculation unit is set according to the input unit and V0, as well as the temperature T collected in real time by the sensing unit, calculate the theoretical threshold voltage at the current temperature . Then, the calculation unit is based on the formula Calculate the actual compensation threshold voltage that needs to be applied The execution unit receives The dynamic compensation process is performed in real time to ensure that the molecular arrangement inside the liquid crystal 322 remains stable even when the temperature changes, so that the passing light beam maintains a deflection of approximately 90 degrees, reducing the influence of external temperature.

[0072] Example 2

[0073] Based on the above embodiments, Figures 5 and 6 As shown, this embodiment further discloses that the second controller is connected to a PID controller, specifically, the sensing unit is connected to the PID controller. The temperature sensor is used to monitor the temperature of the liquid crystal in real time. The PID controller receives the temperature feedback signal from the sensing unit and calculates the control output power based on the deviation between the set temperature and the real-time temperature to control the heating device or the cooling device to adjust the temperature. The PID controller controls the thin film heater for heating and the semiconductor cooling device for cooling.

[0074] Specifically, in this embodiment, a thermal balance model is established as follows:

[0075]

[0076] in, represents heat capacity, Indicates the output power, represents the thermal dissipation coefficient, Indicates the real-time temperature, which is monitored by the temperature sensor in real time. Indicates the ambient temperature.

[0077] In this embodiment, the feedback control of the PID controller is expressed as:

[0078]

[0079] in, represents the output power of the PID controller at time t, represents the proportional term, represents the integral term, represents the differential term. Represents the temperature error, that is , Indicates the set temperature.

[0080] In this embodiment, a thermal balance model and a PID control algorithm are established to achieve accurate and dynamic control of the liquid crystal temperature.

[0081] The temperature sensor is a miniature NTC thermistor or a digital temperature sensor, which is tightly attached to the surface of the liquid crystal 322 or embedded in the accommodating cavity 321 near the liquid crystal 322 to detect its temperature T(t) in real time and transmit it to the PID controller.

[0082] The PID controller compares T(t) with the preset optimal operating temperature of the liquid crystal T set , generally take 25 ° C - 35 ° C, depending on the characteristics of the liquid crystal material, and compare to get the error e (t) = T set -T(t).

[0083] Specifically describes the thermodynamic behavior of the liquid crystal 322 and its adjacent thermal mass: heat capacity Storage / release of thermal energy, heating / cooling power is an input item, related to the ambient temperature Heat exchange is the main dissipation term. Thermal balance model parameters , Can be calibrated through experiments.

[0084] The PID controller calculates the heating or cooling power P required at the current moment based on the real-time error e(t) and its integral and differential. h (t). For example, when T(t) <T set When e(t)>0, the PID controller outputs P h (t)>0, the thin film heater is driven to work; when T(t)>T set When e(t)<0, the PID controller outputs P h (t)<0, or control cooling by logic switching. When driving the semiconductor cooling piece to work, K p , K i , K d The parameter setting needs to consider the characteristics of the thermal balance model and the system's requirements for temperature stability (such as overshoot and adjustment time). The power signal output by the PID controller drives the power circuit, accurately controlling the input current / voltage of the thin film heater or semiconductor refrigeration chip, thereby adjusting the heat or cold applied to the liquid crystal 322, and ultimately forming a closed-loop control system to stabilize the temperature of the liquid crystal 322 at T set within the range of ±ΔT.

[0085] The heating / cooling device is driven accurately according to the thermal balance model to actively stabilize the temperature T(t) of the liquid crystal 322 and its immediate surrounding environment within the preset optimal working range T set Within ±ΔT, the temperature fluctuation amplitude is greatly suppressed, which provides constant deflection V0 and dynamic compensation V ap The effectiveness of the system creates relatively stable prerequisites.

[0086] The PID controller temperature control first suppresses the ambient temperature disturbance within a smaller range; in this relatively stable temperature field. Dynamic voltage compensation can more accurately calculate and apply V ap , ensuring the reliability of 90° deflection; after the liquid crystal has stabilized and completed basic deflection, the magnetic field-driven horizontal polarizer 324 achieves final precise light intensity modulation without temperature interference. This collaborative design completely solves the problems of traditional LCD displays caused by temperature changes, such as molecular disorder and threshold voltage drift, which lead to display distortion, contrast reduction, and slow response speed. It achieves excellent stability across the entire temperature range, outstanding anti-interference capabilities, improved display quality and reliability, and extended service life. It is particularly suitable for scenarios with demanding display performance and environmental adaptability, such as industrial equipment, outdoor displays, automotive displays, and medical equipment.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An LCM liquid crystal display module, consisting of at least three groups of display components and an output screen, characterized in that: The display assembly includes a backlight source (31), a light beam controller (32), and a color filter (33). The light beam controller (32) is provided with an accommodating cavity (321) therein, wherein a liquid crystal (322) is encapsulated in the cavity, and a fixedly mounted vertical polarizer (323) and a rotatable horizontal polarizer (324) are respectively provided at both ends of the accommodating cavity, wherein the horizontal polarizer (324) is connected to the first controller, and the liquid crystal (322) is connected to the second controller. in, The second controller (326) applies an initial operating voltage to the liquid crystal (322) to deflect the passing light beam by 90°, and the first controller (325) controls the horizontal polarizer (324) to control the rotation angle to modulate the light intensity. When the ambient temperature changes, the second controller (326) applies a compensation threshold voltage to the liquid crystal (322) according to the real-time temperature. The second controller (326) includes an input unit and a sensing unit. The sensing unit includes a temperature sensor for monitoring the real-time temperature of the liquid crystal (322). The input unit sets a reference threshold voltage of the liquid crystal (322) at room temperature. A reference model of a threshold voltage varying with the real-time temperature is established, which is expressed as: Among them, the real-time temperature is represented by T, and the reference threshold voltage is represented by V th , represents the threshold voltage that varies with temperature, represents the reference threshold voltage, represents the temperature-dependent elastic constant of the liquid crystal, represents the dielectric anisotropy temperature function, The second controller (326) is connected to the PID controller. The second controller (326) includes an input unit and a sensing unit. The sensing unit includes a temperature sensor for monitoring the real-time temperature of the liquid crystal (322). The PID controller receives the temperature feedback signal from the sensor unit, calculates the control output power according to the deviation between the set temperature and the real-time temperature, and controls the heating device or the cooling device. Among them, the thermal balance model is established as follows: in, represents heat capacity, Indicates the output power, represents the thermal dissipation coefficient, Indicates the real-time temperature, which is monitored by the temperature sensor in real time. Indicates the ambient temperature, The feedback control of the PID controller combined with the thermal balance model is expressed as: in, represents the output power of the PID controller at time t, represents the proportional term, represents the integral term, represents the differential term, Represents the temperature error, that is , Indicates the set temperature.

2. The LCM liquid crystal display module according to claim 1, characterized in that: A plurality of permanent magnets (324A) are installed circumferentially of the horizontal polarizer (324), wherein the permanent magnets (324A) are alternately distributed with N poles and S poles. The first controller (325) applies a magnetic field around the horizontal polarizer (324) to control the rotation of the horizontal polarizer (324).

3. The LCM liquid crystal display module according to claim 1, characterized in that: The dielectric anisotropy temperature function is expressed as: , Indicates T i Dielectric anisotropy reference value at temperature, T c represents the critical point of liquid crystal phase transition, Represents the dielectric attenuation index.

4. The LCM liquid crystal display module according to claim 3, characterized in that: According to a certain threshold voltage V i , reference threshold voltage And the initial working voltage V0, calculate the compensation threshold voltage V ap , which is then input to the liquid crystal by the execution unit, where the calculation formula is as follows: in, It is the voltage margin factor, which is used to offset device aging and environmental interference.

5. The LCM liquid crystal display module according to claim 1, characterized in that: The heating device is a thin film heating plate, and the cooling device is a semiconductor cooling plate.

6. A display screen, characterized in that: It is composed of multiple LCM liquid crystal display modules according to claim 1.

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