A super twisted nematic liquid crystal display
By adopting a separate design for the COM electrode and SEG electrode in the super-twisted nematic liquid crystal display, and independently driving the COM and SEG, the problems of insufficient driving capability and high power loss of single integrated circuits are solved, resulting in a more stable and clearer display effect and a wider viewing angle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CONHUI HUIZHOU SEMICON
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-14
AI Technical Summary
Existing 320×240 dot matrix super-twisted nematic liquid crystal displays suffer from insufficient driving capability of single integrated circuits, poor display steepness, increased power loss due to the common electrode and segment electrode sharing the same step, difficulty in balancing viewing angle and contrast, and prominent crosstalk problems.
The design adopts a separate COM electrode and SEG electrode design, with separate ITO steps designed on the top and bottom glass substrates and connected to the driver IC. The COM and SEG are driven independently, reducing the number of conduction points, enhancing the driving capability, reducing power consumption, and reducing crosstalk.
It significantly improves driving capability, reduces power consumption, enhances display stability and clarity, widens viewing angle, and solves the problem of poor display reliability.
Smart Images
Figure CN224501109U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of liquid crystal displays, and in particular to a super-twisted nematic liquid crystal display. Background Technology
[0002] Super-twisted nematic liquid crystal displays (LCDs) are widely used in various display devices due to their lower cost and power consumption. Among them, 320×240 dot matrix super-twisted nematic LCDs are a common specification and need to meet the requirements of display reliability and contrast under high drive channel counts.
[0003] In existing technologies, 320×240 dot matrix super-twisted nematic liquid crystal displays typically employ single-chip integrated circuit driving. To reduce power loss from indium tin oxide (ITO) traces, ultra-low resistivity (≤7Ω) ITO glass is often used, or the display saturation is improved by developing super-twisted nematic liquid crystals with higher steepness. However, this approach has significant drawbacks: insufficient driving capability of single-chip integrated circuits results in a small effective voltage difference at high driving circuit counts (e.g., 1 / 240 duty), leading to a deterioration in display steepness; the common electrode and segment electrodes share the same step, resulting in dense traces, and the common electrode needs to be connected by conductive gold balls to form a complete trace, increasing power loss and process complexity; simultaneously, the design of existing polarizer and liquid crystal material parameters makes it difficult to balance viewing angle and contrast, leading to prominent crosstalk issues that affect display reliability. Utility Model Content
[0004] This invention aims to at least partially solve one of the problems in related technologies. Therefore, one objective of this invention is to provide a super-twisted nematic liquid crystal display (LCD) that optimizes the driving method, structural layout, and material parameters to improve display performance.
[0005] A super-twisted nematic liquid crystal display (LCL display) includes a surface polarizer, a liquid crystal cell, and a bottom polarizer. The liquid crystal cell includes a surface ITO glass, an upper PI alignment film, a sealing adhesive edge, plastic ball adhesive edge powder, a liquid crystal layer, plastic ball center powder, a lower PI alignment film, and a bottom ITO glass. The surface ITO glass and the bottom ITO glass are bonded together by the sealing adhesive edge to form a closed space. The plastic ball adhesive edge powder supports the height of the sealing adhesive edge. The liquid crystal layer is disposed between the upper PI alignment film and the lower PI alignment film, and the cell thickness is supported by the plastic ball center powder.
[0006] An ITO common electrode is etched on the surface ITO glass. The ITO common electrode and the traces are distributed on the surface ITO glass to form a separate ITO step and connect to the driver IC.
[0007] ITO segment electrodes are etched on the bottom ITO glass. The ITO segment electrodes and traces are distributed on the bottom ITO glass to form individual ITO steps and connect to the driver IC.
[0008] Furthermore, the surface polarizer is a composite polarizer with a double-layer phase difference film, wherein the angles between the double-layer phase difference film and the attraction axis are 25°±2° and 70°±2°, respectively, and the phase difference value is 382±10mm.
[0009] Furthermore, the thickness of the powder in the center of the plastic ball is 6µm to 7µm.
[0010] Furthermore, the resistivity of the liquid crystal material in the liquid crystal layer is ≥100×10⁻⁶. 10 Ω·cm.
[0011] Furthermore, the pretilt angle of the upper PI alignment film and the lower PI alignment film is 5°~7°.
[0012] Furthermore, the bottom polarizer is a linear film or a semi-transparent film without a compensation film.
[0013] Furthermore, the refractive index anisotropy ∆n of the liquid crystal material in the liquid crystal layer is 0.115~0.135.
[0014] Furthermore, the included angle formed by the friction between the upper PI alignment film and the lower PI alignment film is 240°~250°.
[0015] Furthermore, the front ITO glass and the bottom ITO glass are bonded together into a box by hot pressing with frame adhesive and plastic ball edge powder.
[0016] Furthermore, the ITO common electrode and the ITO segment electrode are driven by their respective connected driver ICs.
[0017] The technical solutions provided in this application have the following advantages compared with the prior art:
[0018] This application includes a surface polarizer, a liquid crystal cell, and a bottom polarizer. The liquid crystal cell includes a surface ITO glass, an upper PI alignment film, a sealing adhesive edge and plastic ball edge powder, a liquid crystal layer, a plastic ball center powder, a lower PI alignment film, and a bottom ITO glass. The surface ITO glass and the bottom ITO glass are bonded together by the sealing adhesive edge to form a closed space, and the plastic ball edge powder supports the height of the adhesive edge. The liquid crystal layer is disposed between the upper PI alignment film connected to the segmented electrode and the lower PI alignment film connected to the common electrode, and the cell thickness is supported by the plastic ball center powder. An ITO common electrode (COM) is etched on the surface ITO glass, and it and the traces are distributed on the surface ITO glass, designed as a separate ITO step and connected to a driver IC. An ITO segment electrode (SEG) is etched on the bottom ITO glass, and it and the traces are distributed on the bottom ITO glass, designed as a separate ITO step and connected to a driver IC. The COM electrode and the SEG electrode do not share ICs and steps.
[0019] This application employs a separate design for the COM and SEG electrodes, separating the COM and SEG routing steps. This means the driving and routing are designed on different glass substrates, with each IC driving the COM and SEG independently. Compared to a single IC requiring simultaneous provision of effective voltage values for both COM and SEG, this new design significantly reduces IC power consumption and improves driving capability. Furthermore, the step design on both sides fully utilizes the step width to widen the COM and SEG routing. Compared to the dense routing of COM and SEG on the same step in the old solution, this design also reduces the need for the COM to be a gold ball conduction point, allowing direct routing on the front glass as the COM (common electrode) to further reduce power consumption. The independent steps and IC driving connections enhance driving capability and avoid voltage loss caused by sharing an IC. Separate electrode routing reduces conduction points, widens the routing width, and reduces power loss and crosstalk. Attached Figure Description
[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] In the attached image:
[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of the super-twisted nematic liquid crystal display of this application;
[0024] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the super-twisted nematic liquid crystal display of this application;
[0025] Figure 3 This is a schematic diagram of the connection structure of the top ITO glass, the ITO common electrode, and the driver IC in one embodiment of the super-twisted nematic liquid crystal display of this application.
[0026] Figure 4 This is a schematic diagram of the connection structure of the bottom ITO glass, ITO segment electrodes and driver IC in one embodiment of the super-twisted nematic liquid crystal display of this application.
[0027] Figure 5 This is a schematic diagram illustrating the display principle of the super-twisted nematic liquid crystal display of this application.
[0028] Figure label:
[0029] 1. A super-twisted nematic liquid crystal display; 10. Surface polarizer; 20. Liquid crystal cell; 21. Surface ITO glass; 22. Upper PI alignment film; 23. Sealing edge; 24. Plastic ball edge powder; 25. Liquid crystal layer; 26. Plastic ball center powder; 27. Lower PI alignment film; 28. Bottom ITO glass; 29. ITO common electrode; 210. ITO segment electrode; 30. Bottom polarizer; 40. Driver IC. Detailed Implementation
[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0031] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0032] like Figure 1 - Figure 3As shown, this application provides a super-twisted nematic liquid crystal display 1, including a surface polarizer 10, a liquid crystal cell 20, and a bottom polarizer 30. The liquid crystal cell 20 includes a surface ITO glass 21, an upper PI alignment film 22, a sealing edge 23, a plastic ball edge powder 24, a liquid crystal layer 25, a plastic ball center powder 26, a lower PI alignment film 27, and a bottom ITO glass 28. The surface ITO glass 21 and the bottom ITO glass 28 are bonded together by the sealing edge 23 to form a closed space. The plastic ball edge powder 24 supports the height of the sealing edge. The liquid crystal layer 25 is disposed between the upper PI alignment film 22 and the lower PI alignment film 27, and the cell thickness is supported by the plastic ball center powder 26.
[0033] An ITO common electrode 29 is etched on the surface ITO glass 21. The ITO common electrode 29 and the wiring are distributed on the surface ITO glass 21 to form a separate ITO step and connect to the driver IC 40.
[0034] ITO segment electrodes 210 are etched on the bottom ITO glass 28. The ITO segment electrodes 210 and the traces are distributed on the bottom ITO glass 28 to form individual ITO steps and connect to the driver IC 40.
[0035] The surface polarizer 10 is an important component of the super-twisted nematic liquid crystal display. Its main function is to polarize the incident light, filtering out light that vibrates in non-specific directions, thus providing a basis for the light modulation of the subsequent liquid crystal layer 25. Together with the liquid crystal cell 20 and the bottom polarizer 30, it affects the display effect of the display and is one of the key optical components for achieving image display.
[0036] The LCD cell 20 is the core component of the display, containing various parts that work together to achieve light modulation and display functions.
[0037] An ITO common electrode 29 is etched on the surface ITO glass 21. This common electrode, along with the traces, forms a separate ITO step and connects to the driver IC 40. The ITO common electrode 29 is crucial for electric field control. It works in conjunction with the ITO segment electrode 210 on the bottom ITO glass 28 to create an electric field that drives the liquid crystal molecules to deflect. This separate ITO step design avoids the dense trace problem caused by sharing steps with other electrodes, reduces signal interference, and, by connecting to an independent driver IC 40, enhances the driving capability, provides a more stable voltage to the common electrode, and ensures a stable electric field formation.
[0038] The upper PI alignment film 22 is located on one side of the ITO glass 21 and works together with the lower PI alignment film 27 to orient the liquid crystal molecules. It provides guidance for the alignment of the liquid crystal molecules, enabling them to align in an orderly manner according to a specific direction, laying the foundation for orderly deflection under the subsequent electric field, and ensuring that the modulation effect of the liquid crystal layer 25 on light is uniform and stable.
[0039] The function of the sealing edge 23 is to bond the front ITO glass 21 and the bottom ITO glass 28 together to form a closed space, preventing the liquid crystal material in the liquid crystal layer 25 from leaking. At the same time, it can also block external dust, moisture and other substances from entering the liquid crystal cell 20, ensuring that the liquid crystal layer 25 is in a stable working environment, and ensuring the normal operation and service life of the display.
[0040] The plastic ball adhesive powder 24 is mainly used to support the height of the adhesive edge, ensuring that the distance between the front ITO glass 21 and the bottom ITO glass 28 at the adhesive edge position is stable. Together with the sealing adhesive edge 23, it forms a uniform and stable closed space, providing structural support for the stable existence of the liquid crystal layer 25 and avoiding instability of the liquid crystal cell 20 structure due to uneven adhesive edge height.
[0041] The liquid crystal layer 25, located between the upper PI alignment film 22 and the lower PI alignment film 27, is the core functional layer for achieving light modulation. Under the influence of an electric field, the liquid crystal molecules deflect, thereby altering their optical properties and modulating the passing polarized light. By controlling the degree of deflection of the liquid crystal molecules, different grayscale and brightness levels can be displayed, thus forming an image.
[0042] The plastic ball center powder 26 is used to support the cell thickness, ensuring a stable distance between the upper PI alignment film 22 and the lower PI alignment film 27, thus controlling the uniform thickness of the liquid crystal layer 25. A stable cell thickness is an important condition for ensuring uniform alignment of liquid crystal molecules and consistent light modulation effect, avoiding problems such as uneven display and brightness differences caused by uneven cell thickness.
[0043] Similar to the upper PI alignment film 22, the lower PI alignment film 27 also serves to orient the liquid crystal molecules, enabling them to align in an orderly manner according to the designed direction. The synergistic effect of the upper and lower PI alignment films 27 ensures that the liquid crystal molecules form a stable alignment structure within the liquid crystal layer 25, guaranteeing uniform deflection under the influence of an electric field and thus ensuring the uniformity of light modulation.
[0044] ITO segment electrodes 210 are etched on the bottom ITO glass 28, and these, along with the traces, are distributed on the bottom ITO glass 28, forming individual ITO steps and connecting to the driver IC 40. The ITO segment electrodes 210 and the ITO common electrode 29 on the surface ITO glass 21 form an electric field. The electric field strength is controlled by the voltage provided by the driver IC 40, thereby controlling the deflection of the liquid crystal molecules. The individual ITO step design ensures that the traces are not affected by the common electrode traces, reducing signal interference. The independent driver IC 40 connection allows for precise control of the segment electrode voltage, achieving precise control of each pixel and improving the clarity and accuracy of the display.
[0045] The bottom polarizer 30, positioned opposite the surface polarizer 10, is also an important optical component. Its main function is to further filter and process the polarized light modulated by the liquid crystal layer 25, allowing light that meets specific conditions to be emitted and form a visible image. Its cooperation with the surface polarizer 10 and the liquid crystal layer 25 directly affects the display performance, such as contrast and brightness, and is the final optical processing step in completing the image display.
[0046] These components work together to form a complete display system, from light incidence and modulation to emission, to achieve the display function of the super-twisted nematic liquid crystal display. The structural design and connection method of each component provide support for improving the display's driving capability, reducing signal interference, and ensuring display stability.
[0047] The primary advantage of this design lies in its significantly enhanced driving capability. Independent driver ICs 40 provide voltage to both the common electrode and the segment electrode, avoiding the voltage loss caused by a single IC simultaneously driving two types of electrodes. This ensures a stable effective voltage difference even with high drive line counts, improving display steepness. Secondly, the separated ITO steps reduce the density of traces, minimizing crosstalk between electrodes, resulting in more stable signal transmission and clearer image display. Simultaneously, the common electrode does not require a complete trace formed by connecting conductive gold balls, simplifying the manufacturing process, reducing power loss and failure risks associated with conductive point fabrication, and improving product yield. Furthermore, the independent electrode layout provides a structural basis for optimizing subsequent material parameters (such as polarizers and liquid crystals), enabling improvements in overall display performance and fundamentally solving the problem of poor display reliability in existing technologies.
[0048] Furthermore, the surface polarizer 10 is a composite polarizer with a double-layer phase difference film, wherein the angles between the double-layer phase difference film and the attraction axis are 25°±2° and 70°±2°, respectively, and the phase difference value is 382±10mm.
[0049] The dual-layer phase retardation film design enables phase compensation for incident light at different angles: one layer targets small-angle incident light, while the other targets large-angle incident light, significantly reducing light leakage caused by phase differences and dramatically improving display contrast. A specific angle design (the angle with the attraction axis) ensures that the film's modulation direction matches the alignment of the liquid crystal molecules, resulting in more precise light filtering at different viewing angles. This effectively widens the viewing angle range and solves the problem of traditional displays being "clear when viewed directly, but blurry when viewed from the side." Furthermore, the composite polarizer structure enhances resistance to ambient light interference, maintaining clear contrast even in strong light environments, resulting in a more stable display. Simultaneously, optimized phase difference values ensure more uniform phase compensation, preventing uneven brightness in certain areas and improving overall display consistency.
[0050] Furthermore, the thickness of the powder 26 in the center of the plastic ball is 6µm to 7µm.
[0051] This thickness range ensures that liquid crystal molecules align in an orderly manner under the influence of an electric field, reducing display unevenness caused by disordered alignment and resulting in a more uniform and delicate image. A stable cell thickness provides consistent space for the deflection of liquid crystal molecules, ensuring consistent response speeds across different areas, avoiding localized image delays or ghosting, and improving dynamic display effects. Simultaneously, a suitable cell thickness matches the physical properties of the liquid crystal material (such as refractive index anisotropy), enhancing the modulation efficiency of light in the liquid crystal layer 25, resulting in more uniform display brightness and further improving the overall image quality. Furthermore, the supporting effect of the plastic sphere center powder 26 prevents deformation of the cell thickness during long-term use, enhancing the product's structural stability and lifespan.
[0052] Furthermore, the resistivity of the liquid crystal material in the liquid crystal layer 25 is ≥100×10⁻⁶. 10 Ω·cm.
[0053] High-resistivity liquid crystal materials effectively reduce leakage current, ensuring that the voltage applied to the electrodes is stably transmitted to the liquid crystal molecules, resulting in more precise liquid crystal deflection and improved image clarity and grayscale levels. Simultaneously, high insulation properties reduce electromagnetic induction between the liquid crystal layer 25 and the electrodes, minimizing crosstalk between different electrode signals. This makes complex images (such as text and charts) clearer and avoids blurring or distortion caused by signal interference. Furthermore, high-resistivity materials exhibit stronger chemical stability, making them less prone to aging due to current during long-term use, extending the lifespan of the liquid crystal layer 25 and improving the overall reliability of the product. For displays with high drive channels, stable voltage transmission and anti-interference capabilities are particularly important, and these material characteristics provide a crucial guarantee for their stable operation.
[0054] Furthermore, the pretilt angle of the upper PI alignment film 22 and the lower PI alignment film 27 is 5°~7°.
[0055] This pretilt angle range allows liquid crystal molecules to align at a stable initial angle, reducing light scattering caused by disordered alignment, improving the uniformity of the displayed image, and preventing the appearance of localized bright or dark areas. Simultaneously, a reasonable pretilt angle shortens the deflection distance of liquid crystal molecules under the influence of an electric field, accelerating the response speed and making dynamic image transitions smoother, reducing ghosting. Furthermore, the stable initial alignment makes the liquid crystal molecules more consistently sensitive to voltage changes, ensuring uniform grayscale levels across different areas of the image and improving display accuracy. For super-twisted nematic liquid crystal displays, the ordered alignment of liquid crystal molecules is fundamental to achieving the "super-twisted" structure; this pretilt angle design provides a stable initial state for this structure, further enhancing the display steepness.
[0056] Furthermore, the bottom polarizer 30 is a linear film or a semi-transparent film without a compensation film.
[0057] The linear film without compensation film has a simple structure and can complement the double-layer phase difference film of the surface polarizer 10, avoiding light loss caused by overcompensation, improving light utilization, and making the displayed image brighter. The translucent film has dual reflective and transmissive properties. In strong light environments, it can enhance the brightness of the image through reflection, and in low light environments, it can ensure clear display through transmission, enhancing the monitor's adaptability to different lighting environments and expanding its application scenarios (such as outdoor and indoor). In addition, the simplified structure of the bottom polarizer 30 reduces production complexity and cost, while ensuring the matching accuracy with the surface polarizer 10, making the overall display effect more stable and avoiding graying or color distortion of the image caused by compensation conflicts.
[0058] Furthermore, the refractive index anisotropy ∆n of the liquid crystal material in the liquid crystal layer 25 is 0.115~0.135.
[0059] This range of refractive index anisotropy makes the differences in light refraction by liquid crystal molecules under the influence of an electric field more significant, enhancing the modulation capability of light and improving the brightness and contrast of the displayed image. For super-twisted nematic liquid crystals, a suitable refractive index difference is the foundation for achieving the "super-twisted" structured light modulation effect, ensuring more precise light filtering under different twisting states and making the contrast between light and dark in the image more vivid. At the same time, this characteristic matches the parameters of the polarizer, further enhancing the light utilization rate, making the displayed image clearer and the colors more saturated. In addition, stable refractive index anisotropy ensures the consistency of light modulation by liquid crystals in different areas, reducing display unevenness and improving the overall image quality.
[0060] Furthermore, the included angle formed by the friction between the upper PI alignment film 22 and the lower PI alignment film 27 is 240°~250°.
[0061] This angle range allows liquid crystal molecules to form a stable, ultra-twisted structure, enhancing their sensitivity to light modulation, increasing display steepness, and making transitions between light and dark areas sharper, avoiding blurring in transition regions. The optimized twist angle shortens the twist response time of liquid crystal molecules under an electric field, accelerating the screen refresh rate and making dynamic displays smoother. Simultaneously, the stable twisted structure ensures more consistent feedback from liquid crystal molecules to voltage changes, guaranteeing synchronous response across different areas of the screen and reducing localized delays. For high-resolution dot-matrix displays, sharp display steepness and fast response are crucial for clearly displaying text and graphics; this design provides structural support, further improving display quality.
[0062] Furthermore, the front ITO glass 21 and the bottom ITO glass 28 are bonded together into a box by hot pressing with frame adhesive and plastic ball edge powder 24.
[0063] The hot-press bonding process ensures that the frame adhesive fully fills the gaps between the glass panes, forming a tight sealing layer that effectively prevents liquid crystal leakage, ensuring the integrity of the liquid crystal layer 25 and avoiding display area loss or distortion caused by leakage. The plastic ball adhesive powder 24 provides uniform support during bonding, ensuring the parallelism of the bonded glass and preventing glass breakage or uneven cell thickness due to uneven local stress, thus improving structural stability. Simultaneously, the tight sealing layer prevents the infiltration of external moisture and dust, reducing contamination and aging of the liquid crystal layer 25, extending the product's lifespan, and improving reliability in humid and dusty environments. For monitors used for extended periods, stable sealing is crucial for maintaining display performance, and this bonding method provides a reliable guarantee.
[0064] Furthermore, the ITO common electrode 29 and the ITO segment electrode 210 are driven by their respective connected driver ICs.
[0065] Independent IC driving enables the ITO common electrode 29 and ITO segment electrode 210 to obtain their respective stable voltages, avoiding losses caused by voltage distribution conflicts, enhancing driving capability, and ensuring sufficient effective voltage difference even with high drive number. Each IC can independently adjust its output according to the load requirements of the corresponding electrode, improving the accuracy of voltage control, resulting in richer grayscale levels and more delicate display. At the same time, independent driving reduces signal interference between the two types of electrodes, making signal transmission cleaner, avoiding image noise or ghosting caused by crosstalk, and improving display clarity. For complex dot matrix displays, independent voltage control is key to accurately displaying each pixel. This driving method provides power assurance for high-reliability, high-contrast displays and further optimizes overall performance.
[0066] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.
Claims
1. A super-twisted nematic liquid crystal display, characterized in that, The device includes a surface polarizer, a liquid crystal cell, and a bottom polarizer. The liquid crystal cell includes a surface ITO glass, an upper PI alignment film, a sealing adhesive edge, plastic ball adhesive edge powder, a liquid crystal layer, plastic ball center powder, a lower PI alignment film, and a bottom ITO glass. The surface ITO glass and the bottom ITO glass are bonded together by the sealing adhesive edge to form a closed space. The plastic ball adhesive edge powder supports the height of the sealing adhesive edge. The liquid crystal layer is disposed between the upper PI alignment film and the lower PI alignment film, and the cell thickness is supported by the plastic ball center powder. An ITO common electrode is etched on the surface ITO glass. The ITO common electrode and the traces are distributed on the surface ITO glass to form a separate ITO step and connect to the driver IC. ITO segment electrodes are etched on the bottom ITO glass. The ITO segment electrodes and traces are distributed on the bottom ITO glass to form individual ITO steps and connect to the driver IC.
2. The super-twisted nematic liquid crystal display according to claim 1, characterized in that, The surface polarizer is a composite polarizer with a double-layer phase difference film. The angles between the double-layer phase difference film and the attraction axis are 25°±2° and 70°±2°, respectively, and the phase difference value is 382±10mm.
3. A super-twisted nematic liquid crystal display according to claim 2, characterized in that, The thickness of the powder in the center of the plastic ball is 6um to 7um.
4. A super-twisted nematic liquid crystal display according to claim 3, characterized in that, The resistivity of the liquid crystal material in the liquid crystal layer is ≥100×10⁻⁶. 10 Ω·cm.
5. A super-twisted nematic liquid crystal display according to claim 1, characterized in that, The pretilt angle of the upper PI alignment film and the lower PI alignment film is 5°~7°.
6. A super-twisted nematic liquid crystal display according to claim 1, characterized in that, The bottom polarizer is a linear film or a semi-transparent film without a compensation film.
7. A super-twisted nematic liquid crystal display according to claim 1, characterized in that, The refractive index anisotropy ∆n of the liquid crystal material in the liquid crystal layer is 0.115~0.
135.
8. A super-twisted nematic liquid crystal display according to claim 1, characterized in that, The included angle formed by the friction between the upper PI alignment film and the lower PI alignment film is 240°~250°.
9. A super-twisted nematic liquid crystal display according to claim 1, characterized in that, The front ITO glass and the bottom ITO glass are bonded together into a box by hot pressing with frame adhesive and plastic ball edge powder.
10. A super-twisted nematic liquid crystal display according to claim 1, characterized in that, The ITO common electrode and the ITO segment electrode are driven by their respective connected driver ICs.