Wide-temperature-range color development stabilizing method for liquid crystal display screen

Abstract

The invention discloses a wide-temperature-range color development stabilizing method of a liquid crystal display screen, which is characterized in that through innovative structural design and a dynamic compensation mechanism, the stability of a display bottom color is maintained in an extreme temperature range from-30 DEG C to 80 DEG C. An electric control birefringence compensation layer is additionally arranged between a lower glass substrate and a lower polaroid, and the layer is made of a polymer network stable liquid crystal material; a temperature sensor and a voltage controller are integrated in the system, the environment temperature is detected in real time, corresponding compensation voltage 0-10 V is applied to the transparent driving electrode, the effective birefringence and the optical axis direction of the compensation layer are accurately regulated and controlled, phase delay drift caused by temperature change is dynamically counteracted, and therefore the polarization effect of the polarizer is improved. And the wide-temperature-range color cast performance is optimized. Compared with the prior art, the liquid crystal display device has the advantages that the technology is fast in response, special liquid crystal materials or box thickness gradient design is not needed, and the visual quality and reliability of liquid crystal display in an extreme environment are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal display technology, and in particular to a wide-temperature-range color stabilization method for liquid crystal displays based on electronically controlled birefringence compensation, which is suitable for application scenarios with stringent requirements for color stability, such as automotive, industrial control, and outdoor information terminals. Background Technology

[0002] Liquid crystal displays (LCDs) are widely used in various electronic devices due to their low power consumption, high brightness, and mature manufacturing processes. However, the optical properties of liquid crystal materials are highly sensitive to temperature: as ambient temperature rises, the birefringence of the liquid crystal decreases significantly, leading to a reduction in the phase retardation of the liquid crystal layer, which in turn causes a change in the polarization state of transmitted light, manifesting as a shift in the display's background color. This problem is particularly pronounced within a wide temperature range of -30℃ to 80℃, severely impacting visual consistency and product reliability.

[0003] To address this issue, existing technologies have proposed various compensation schemes. For example, Chinese invention patent application CN2023107817915 proposes optimizing the polarization effect at high temperatures by "dynamically adjusting the polarization angles of the upper and lower polarizers," specifically described as: "When the temperature rises from 25°C to 80°C, the angle of the upper polarizer is adjusted from 110° to 107°, and the angle of the lower polarizer is adjusted from 105° to 112°." However, once the polarizers are thermo-pressed onto the glass substrate using optical adhesive, their polarization axis direction is physically fixed, making angle rotation impossible during device operation. This solution lacks a feasible actuator or material basis, constituting a functional description without practical implementation, making it difficult to apply in engineering practice.

[0004] Other solutions include introducing a thickness gradient structure into the liquid crystal layer, doping with temperature-sensitive materials, or using multilayer evaporated optical films. While these methods can alleviate color drift to some extent, they generally suffer from drawbacks such as complex processes, high costs, low yields, or applicability only within specific temperature ranges. More importantly, none of them solve the fundamental problem of "how to achieve full-temperature-range, real-time, and reversible dynamic polarization compensation without altering the internal structure of the liquid crystal cell."

[0005] Therefore, there is an urgent need for a new color stabilization technology that is simple in structure, fast in response, and can be integrated into existing production lines to meet the high-end display market's pressing need for wide-temperature color consistency. Summary of the Invention

[0006] The purpose of this invention is to provide a wide-temperature-range color stabilization method for liquid crystal displays. By introducing an electrically controlled birefringence compensation layer, the phase of polarized light can be dynamically adjusted in real time, thereby effectively suppressing background color drift in a temperature range of -30℃ to 80℃, without the need to physically replace the polarizer or modify the internal structure of the liquid crystal cell.

[0007] According to one aspect of the present invention, a method for wide-temperature-range color stabilization of a liquid crystal display screen is provided, characterized by comprising the following steps: S1. A liquid crystal display panel is provided, the liquid crystal display panel including an upper substrate and a lower substrate disposed opposite to each other, a liquid crystal layer sandwiched between the upper substrate and the lower substrate, an upper electrode formed on the inner side of the upper substrate, a lower electrode formed on the inner side of the lower substrate, an upper polarizer attached to the outer side of the upper substrate, and a lower polarizer attached to the outer side of the lower substrate, wherein the polarization axis directions of the upper polarizer and the lower polarizer are non-orthogonal at room temperature of 25°C. S2. An electrically controlled birefringence compensation layer is provided between the lower substrate and the lower polarizer. The electrically controlled birefringence compensation layer is composed of a polymer network-stabilized nematic liquid crystal material, and its initial optical axis direction forms an angle of 10° to 20° with the polarization axis direction of the lower polarizer. S3. An upper transparent driving electrode and a lower transparent driving electrode are respectively disposed on the upper and lower surfaces of the electrically controlled birefringence compensation layer, and the upper and lower transparent driving electrodes are connected to a voltage controller; S4. A temperature sensor is integrated inside or around the liquid crystal display panel for real-time detection of ambient temperature T; S5. The voltage controller obtains the corresponding compensation voltage V_comp from the pre-stored temperature-compensation voltage mapping relationship according to the ambient temperature T, and applies it to the upper and lower transparent driving electrodes to regulate the effective birefringence Δn_comp and the equivalent optical axis direction θ_eff of the electrically controlled birefringence compensation layer. S6. The polarized light transmitted through the liquid crystal layer is dynamically phase compensated by the electrically controlled birefringence compensation layer, so that during the process of the ambient temperature changing from -30℃ to 80℃, the total color difference ΔE*ab of the display background color coordinates of the liquid crystal display panel in the CIE L*a*b* color space does not exceed 3.0, and the light blue tone is maintained.

[0008] Preferably, the thickness of the electrically controlled birefringence compensation layer is 1.0 micrometer to 3.0 micrometer, which exhibits a low birefringence scattering state at 0V voltage and transforms into a high birefringence transparent state when a DC or low-frequency AC voltage of 3V to 10V is applied, and the effective birefringence Δn_comp is continuously adjustable in the range of 0.05 to 0.20.

[0009] Preferably, the temperature-compensation voltage mapping relationship is established in the following manner: Before leaving the factory, the liquid crystal display panel is placed in a temperature-controlled environment, and the ambient temperature is adjusted to multiple calibration points T_i (i=1,2,…,n) in sequence. At each T_i, the compensation voltage V_comp is adjusted until the display background color reaches the target color coordinates. The corresponding (V_comp, T_i) data pairs are recorded, and the functional relationship V_comp = f(T) is obtained by fitting and stored in the non-volatile memory of the voltage controller.

[0010] Preferably, the non-orthogonal configuration means that the polarization axis of the upper polarizer is 105° to 115°, the polarization axis of the lower polarizer is 100° to 110°, and the included angle between them is 5° to 15°.

[0011] Preferably, the polymer network-stabilized nematic liquid crystal material is prepared by the following process: a nematic liquid crystal monomer, a photocurable difunctional acrylate monomer, and a photoinitiator are mixed in a mass ratio of 90–95 : 5–10 : 0.1–0.5, coated on a substrate with a transparent driving electrode, partially exposed to ultraviolet light to form a polymer network framework, and then completely cured to obtain the electrically controlled birefringence compensation layer.

[0012] Preferably, the voltage controller is integrated into the driving integrated circuit of the liquid crystal display panel, and the adjustment response time of the compensation voltage V_comp does not exceed 100 milliseconds.

[0013] Preferably, the liquid crystal layer adopts a conventional uniform cell thickness structure with a cell thickness of 4.0 to 6.0 micrometers, without the need to set a thickness gradient or dopant temperature-sensitive / photosensitive materials. The beneficial effects of this invention are: An electrically controlled birefringence compensation layer is disposed between the lower substrate and the lower polarizer. This external placement method allows the compensation layer to be completely external to the liquid crystal cell. When a voltage is applied to the transparent driving electrode of the compensation layer, the liquid crystal molecules in the polymer network will rearrange according to the electric field strength, causing the effective optical axis direction θ_eff and the effective birefringence Δn_comp to change continuously without any modification to the liquid crystal layer. This fundamentally solves the basic problem in the background technology of "how to achieve compensation without changing the internal structure of the liquid crystal cell". At the same time, by controlling the voltage rather than mechanical movement, the engineering implementation obstacle of the polarizer angle being unable to be dynamically adjusted is completely overcome. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the layered structure of the liquid crystal display screen of the present invention; Figure 2A schematic diagram illustrating the working principle of an electrically controlled birefringent compensation layer; Figure 3 This is a flowchart of the method of the present invention; Figure 4 Example of a temperature-compensation voltage mapping calibration curve; Figure 5 This is a comparison curve showing the change of background color ΔE*ab with temperature with and without a compensation layer.

[0015] Explanation of reference numerals in the attached figures: 1. Upper polarizer; 2. Upper glass substrate; 3. Upper electrode; 4. Liquid crystal layer; 5. Lower electrode; 6. Lower glass substrate; 7. Upper transparent driving electrode; 8. Electro-controlled birefringence compensation layer; 9. Lower transparent driving electrode; 10. Lower polarizer; 11. Temperature sensor. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0018] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention. Please see Figure 1-5 As shown, this invention provides a method for stabilizing the color rendering of a liquid crystal display screen over a wide temperature range, comprising the following steps: S1. A liquid crystal display panel is provided, the liquid crystal display panel including an upper substrate and a lower substrate disposed opposite to each other, a liquid crystal layer 4 sandwiched between the upper substrate and the lower substrate, an upper electrode 3 formed on the inner side of the upper substrate, a lower electrode 5 formed on the inner side of the lower substrate, an upper polarizer 1 attached to the outer side of the upper substrate, and a lower polarizer 10 attached to the outer side of the lower substrate, wherein the polarization axis directions of the upper polarizer 1 and the lower polarizer 10 are non-orthogonal at room temperature of 25°C. S2. An electrically controlled birefringence compensation layer 8 is provided between the lower substrate and the lower polarizer 10. The electrically controlled birefringence compensation layer 8 is composed of a polymer network-stabilized nematic liquid crystal material, and its initial optical axis direction forms an angle of 10° to 20° with the polarization axis direction of the lower polarizer 10. S3. An upper transparent driving electrode 7 and a lower transparent driving electrode 9 are respectively disposed on the upper and lower surfaces of the electrically controlled birefringence compensation layer 8, and the upper and lower transparent driving electrodes 7 and 9 are connected to a voltage controller. S4. A temperature sensor 11 is integrated inside or around the liquid crystal display panel for real-time detection of ambient temperature T; S5. The voltage controller obtains the corresponding compensation voltage V_comp from the pre-stored temperature-compensation voltage mapping relationship according to the ambient temperature T, and applies it to the upper transparent driving electrode 7 and the lower transparent driving electrode 9 to regulate the effective birefringence Δn_comp and the equivalent optical axis direction θ_eff of the electrically controlled birefringence compensation layer 8. S6. The polarized light transmitted through the liquid crystal layer 4 is dynamically phase compensated by the electrically controlled birefringence compensation layer 8, so that during the process of the ambient temperature changing from -30℃ to 80℃, the total color difference ΔEab of the display background color coordinates of the liquid crystal display panel in the CIELab color space does not exceed 3.0, and the light blue tone is maintained.

[0019] like Figure 1 As shown, the liquid crystal display panel of this embodiment includes, from top to bottom, the following: an upper polarizer 1 (polarization axis 110°), an upper glass substrate 2, an upper electrode 3 (ITO), a liquid crystal layer 4 (uniform cell thickness 5.0μm, nematic liquid crystal MLC-2065), a lower electrode 5 (ITO), a lower glass substrate 6, an upper transparent driving electrode 7 (ITO), an electrically controlled birefringence compensation layer 8, a lower transparent driving electrode 9 (ITO), a lower polarizer 10 (polarization axis 105°), a temperature sensor 11 embedded in the frame FPC, and a voltage controller integrated into the source driver IC.

[0020] Preparation of the electrically controlled birefringence compensation layer 8: Nematic liquid crystal E7 (92wt%), difunctional acrylate monomer RM257 (7.5wt%), and photoinitiator Irgacure651 (0.5wt%) are mixed evenly and formed into a 1.8μm thick liquid film on a TAC film with ITO electrode 9 using a slit coater. Under a nitrogen atmosphere, the film is first irradiated with 5mW / cm² UV light for 30 seconds to form a polymer network, and then completely cured with 50mW / cm² to obtain a polymer network stabilized liquid crystal (PNLC) compensation layer. Its initial optical axis direction is set to 120° by a friction alignment layer. The friction alignment layer is a key functional layer in liquid crystal devices. Through the friction alignment layer, liquid crystal molecules can form a unified optical axis direction. The initial optical axis direction of the electrically controlled birefringence compensation layer 8 is 120°, and the polarization axis direction of the lower polarizer 10 is 105°, forming a 15° angle between them. Initial optical axis control is one of the key foundations for achieving stable color development over a wide temperature range. The frictional orientation process fixes the initial state during manufacturing, while electric field control provides dynamic adjustment capabilities. The combination of the two achieves the technical effect described in the patent.

[0021] The electrically controlled birefringence compensation layer 8 has a thickness of 1.0 micrometer to 3.0 micrometers. It exhibits a low birefringence scattering state at 0V and transforms into a high birefringence transparent state when a DC or low-frequency AC voltage of 3V to 10V is applied. The effective birefringence Δn_comp is continuously adjustable within the range of 0.05 to 0.20. This precise parameter range design allows the compensation layer to provide sufficient phase delay adjustment capability across the entire temperature range of -30℃ to 80℃ while maintaining >95% transmittance, overcoming the limitation of being only applicable to specific temperature ranges without sacrificing display brightness.

[0022] The temperature-compensation voltage mapping relationship is established as follows: Before leaving the factory, the liquid crystal display panel is placed in a temperature-controlled environment, and the ambient temperature is adjusted to multiple calibration points T_i (i=1,2,…,n) in sequence. At each T_i, the compensation voltage V_comp is adjusted until the display background color reaches the target color coordinates. The corresponding (V_comp,T_i) data pairs are recorded, and the functional relationship V_comp=f(T) is obtained by fitting and stored in the non-volatile memory of the voltage controller.

[0023] like Figure 3 As shown, after the system starts, temperature sensor 11 collects the ambient temperature T in real time and transmits it to the voltage controller. The controller then queries the pre-stored mapping table ( Figure 4 The output corresponds to V_comp, for example: T=25℃→V_comp=0V; T=80℃→V_comp=6.5V; T = -30℃ → V_comp = 2.1V.

[0024] At each temperature point, the chromatic coordinates of the white background color were measured using a spectroradiometer, and ΔEab was calculated relative to a 25°C reference. The results are as follows: Figure 5 As shown: Without compensation layer: ΔEab=8.7 at 80℃, ΔEab=6.2 at -30℃; With the compensation layer 8 of the present invention: ΔEab=2.3 at 80℃ and ΔEab=1.9 at -30℃.

[0025] All data meet the requirement of ΔEab<3.0, and the background color remains light blue throughout.

[0026] Before mass production, each panel undergoes seven calibration points in a temperature-controlled chamber: -40℃, -20℃, 0℃, 25℃, 50℃, 70℃, and 85℃. At each temperature point, V_comp is automatically adjusted (0–10V in 0.1V steps) to find the voltage that makes Lab closest to the target value (L=92, a=-3, b=-8), which is recorded as V_opt. Finally, a quadratic function is fitted. V_comp=0.0021⋅(T−25)2+0.085⋅(T−25), this parameter is written into the OTP memory of the driver IC.

[0027] The non-orthogonal configuration refers to the following: the polarization axis direction of the upper polarizer 1 is 105° to 115°, the polarization axis direction of the lower polarizer 10 is 100° to 110°, the included angle between the two is 5° to 15°, and the included angle between the polarization axis directions of the upper polarizer 1 and the lower polarizer 10 is preferably 10°. This angle can optimize the color difference performance in a wide temperature range while ensuring contrast.

[0028] The polymer network-stabilized nematic liquid crystal material is prepared by the following process: Nematic liquid crystal monomers, photocurable difunctional acrylate monomers, and photoinitiators are mixed in a mass ratio of 90–95:5–10:0.1–0.5 and coated onto a substrate with a transparent driving electrode 9. After partial exposure to ultraviolet light, a polymer network framework is formed, and then the mixture is fully cured to obtain the electrically controlled birefringence compensation layer 8. The nematic liquid crystal monomers are preferably from the E7 series, the difunctional acrylate monomers are preferably from RM257, and the photoinitiator is preferably from Irgacure 651. This combination can provide excellent optical performance and mechanical stability.

[0029] The voltage controller is integrated into the driving integrated circuit of the liquid crystal display panel. The adjustment response time of the compensation voltage V_comp is no more than 100 milliseconds. The voltage controller adjusts the voltage on the upper and lower transparent driving electrodes 7 and 9 through the PWM signal with a response time of no more than 100 milliseconds, ensuring that the compensation voltage can be quickly adjusted when the temperature changes, thus maintaining the display quality.

[0030] The liquid crystal layer 4 adopts a conventional uniform cell thickness structure with a cell thickness of 4.0 to 6.0 micrometers. It does not require the setting of thickness gradient or doping with temperature-sensitive / photosensitive materials. The uniform cell thickness design of the liquid crystal layer 4 simplifies the manufacturing process, reduces costs, and avoids optical non-uniformity problems caused by thickness gradient.

[0031] Figure 4The mapping relationship between temperature and compensation voltage in this invention is illustrated by the curve. The horizontal axis represents the ambient temperature T (unit: °C), ranging from -40 °C to 90 °C; the vertical axis represents the compensation voltage Vcomp (unit: V), ranging from 0 V to 10 V. The curve exhibits an asymmetric U-shaped distribution, with 25 °C as the reference zero point (Vcomp = 0 V). According to experimental calibration data, the required compensation voltage is 3.2 V at -40 °C, 2.5 V at -20 °C, and 1.8 V at 0 °C; it rises to 4.1 V at 50 °C, reaches 5.8 V at 70 °C, and is 7.3 V at 85 °C. This curve can be accurately fitted using a quadratic polynomial function: Vcomp=0.0021⋅(T−25)2+0.085⋅(T−25) Where T represents the ambient temperature. This mapping relationship is pre-stored in the non-volatile memory of the voltage controller, providing a data basis for real-time dynamic compensation.

[0032] Figure 5 The comparison illustrates the performance difference of the background color difference (ΔEab) of the liquid crystal display screen before and after adopting the electrically controlled birefringence compensation layer 8 of this invention, as a function of temperature. The horizontal axis represents the ambient temperature T (°C), and the vertical axis represents the total color difference ΔEab in the CIELab color space. The figure includes two key curves: Uncompensated curve (black line): ΔEab = 6.2 at -30℃, 0 at 25℃ (reference point), and as high as 8.7 at 80℃, which is significantly beyond the acceptable threshold for the human eye; There is a compensation curve (gray line): ΔEab is always controlled below 2.3 throughout the entire range of -30℃ to 80℃, with 1.9 at -30℃ and 2.3 at 80℃. The horizontal dashed line in the figure indicates the threshold of color difference that is imperceptible to the human eye (ΔE*ab=3.0). The data shows that the present invention can maintain high color stability even at extreme temperatures, meeting the stringent requirements of automotive-grade display devices for wide temperature range color deviation control, such as the AEC-Q100 Grade 2 standard.

[0033] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application 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 this application described herein can be implemented in sequences other than those illustrated or described herein.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for stabilizing color rendering over a wide temperature range in a liquid crystal display screen, characterized in that, Includes the following steps: S1. A liquid crystal display panel is provided, the liquid crystal display panel including an upper substrate and a lower substrate disposed opposite to each other, a liquid crystal layer sandwiched between the upper substrate and the lower substrate, an upper electrode formed on the inner side of the upper substrate, a lower electrode formed on the inner side of the lower substrate, an upper polarizer attached to the outer side of the upper substrate, and a lower polarizer attached to the outer side of the lower substrate, wherein the polarization axis directions of the upper polarizer and the lower polarizer are non-orthogonal at room temperature of 25°C. S2. An electrically controlled birefringence compensation layer is provided between the lower substrate and the lower polarizer. The electrically controlled birefringence compensation layer is composed of a polymer network-stabilized nematic liquid crystal material, and its initial optical axis direction forms an angle of 10° to 20° with the polarization axis direction of the lower polarizer. S3. An upper transparent driving electrode and a lower transparent driving electrode are respectively disposed on the upper and lower surfaces of the electrically controlled birefringence compensation layer, and the upper and lower transparent driving electrodes are connected to a voltage controller; S4. A temperature sensor is integrated inside or around the liquid crystal display panel for real-time detection of ambient temperature T; S5. The voltage controller obtains the corresponding compensation voltage V_comp from the pre-stored temperature-compensation voltage mapping relationship according to the ambient temperature T, and applies it to the upper and lower transparent driving electrodes to regulate the effective birefringence Δn_comp and the equivalent optical axis direction θ_eff of the electrically controlled birefringence compensation layer. S6. The polarized light transmitted through the liquid crystal layer is dynamically phase compensated by the electrically controlled birefringence compensation layer, so that during the process of the ambient temperature changing from -30℃ to 80℃, the total color difference ΔE*ab of the display background color coordinates of the liquid crystal display panel in the CIE L*a*b* color space does not exceed 3.0, and the light blue tone is maintained.

2. The method for wide-temperature-range color stabilization of a liquid crystal display screen according to claim 1, characterized in that, The thickness of the electrically controlled birefringence compensation layer is 1.0 micrometer to 3.0 micrometer. It exhibits a low birefringence scattering state at 0V and transforms into a high birefringence transparent state when a DC or low-frequency AC voltage of 3V to 10V is applied. The effective birefringence Δn_comp is continuously adjustable in the range of 0.05 to 0.

20. The wide-temperature-range color stabilization method for a liquid crystal display screen according to claim 1 is characterized in that the temperature-compensation voltage mapping relationship is established in the following manner: Before leaving the factory, the liquid crystal display panel is placed in a temperature-controlled environment, and the ambient temperature is adjusted to multiple calibration points T_i (i=1,2,…,n) in sequence. At each T_i, the compensation voltage V_comp is adjusted until the display background color reaches the target color coordinates. The corresponding (V_comp, T_i) data pairs are recorded, and the functional relationship V_comp = f(T) is obtained by fitting and stored in the non-volatile memory of the voltage controller.

3. The method for wide-temperature-range color stabilization of a liquid crystal display screen according to claim 1, characterized in that, The non-orthogonal configuration refers to the following: the polarization axis of the upper polarizer is 105° to 115°, the polarization axis of the lower polarizer is 100° to 110°, and the included angle between them is 5° to 15°. The wide-temperature-range color stabilization method for a liquid crystal display screen according to claim 1 is characterized in that the polymer network-stabilized nematic liquid crystal material is prepared by the following process: Nematic liquid crystal monomers, photocurable difunctional acrylate monomers, and photoinitiators are mixed in a mass ratio of 90–95 : 5–10 : 0.1–0.5, coated on a substrate with a transparent driving electrode, partially exposed to ultraviolet light to form a polymer network framework, and then fully cured to obtain the electrically controlled birefringence compensation layer.

4. The method for wide-temperature-range color stabilization of a liquid crystal display screen according to claim 1, characterized in that, The voltage controller is integrated into the driving integrated circuit of the liquid crystal display panel, and the adjustment response time of the compensation voltage V_comp does not exceed 100 milliseconds. The wide-temperature-range color stabilization method for a liquid crystal display screen according to claim 1 is characterized in that, The liquid crystal layer adopts a conventional uniform cell thickness structure with a cell thickness of 4.0 to 6.0 micrometers, without the need to set a thickness gradient or dopant temperature-sensitive / photosensitive materials.

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