Panoramic skylight, also known as unopenable skylight. When Tesla first entered the domestic market, not many consumers came for the panoramic canopy. It broke the traditional car metal frame plus glass design. From the windshield to the rear glass, the middle was completely assembled by a whole glass. It reflects the scenery outside the window into the car to the greatest extent, improving the appearance, space and technology of the entire vehicle.
Panoramic awnings mostly use a closed roof structure and do not have opening and closing functions. Therefore, the structure is much simpler than traditional skylight systems and also significantly reduces costs.
Some organizations predict that the penetration rate of canopy glass in new energy vehicles is expected to reach 55% by 2025. This means that panoramic canopies have basically become standard equipment in new energy vehicles.
However, as the penetration rate increases, it becomes increasingly urgent to solve the heat insulation problem caused by strong sunlight. In response to the heat insulation problem, most car companies currently enhance the heat insulation effect by changing the color of the glass and adding sunshades. However, such methods either have little effect or sacrifice the large space and transparency originally achieved through the panoramic canopy.
Zhonghe Technology has invested R&D funds and personnel since 2017. A few years ago, it has been very maturely used in side windows, sunroofs and other parts of rail transit and family cars. As the new energy vehicle market continues to expand, Zhonghe Technology has also launched a variety of dimmable canopy solutions:
1. PDLC dimming glass
PDLC (polymer dispersed liquid crystal) is a liquid crystal dispersed in the matrix of an organic solid polymer capsule in the form of micron-sized droplets. In the power-off state, due to the light emitted by the small droplets composed of liquid crystal molecules, The axis is in a free orientation, and its refractive index does not match that of the matrix. When light passes through the matrix, it is strongly scattered by the droplets and appears in an opaque milky white state. Applying an electric field can adjust the optical axis orientation of the liquid crystal droplets. When the refractive index of the two matches, the liquid crystal droplets appear transparent.
PDLC is polymer dispersed liquid crystal dimming glass, as a material with rich functions, it can be summarized into several major characteristics such as aesthetics, privacy, practicality, entertainment, and safety.
Zhonghe Technology laser etched pattern PDLC dimming canopy
2. EPC color changing glass
The new intelligent reversible electronically controlled dimming film material developed by Zhonghe Technology Postdoctoral Workstation, namely EPC electropolarized crystal (electric polarized crystal) preparation technology, is a kind of polarized crystal suspended and dispersed in a polymer network. Film-forming optoelectronic materials. By inducing the phenomenon of charge electroosmosis, the specific movement/arrangement of charged particles under the action of electric field is used to achieve the blocking and transmission of light.
When there is no voltage, the particles are evenly distributed, thereby reflecting and scattering light, and the film appears dark; when a voltage is applied, the particles move in the direction of the electric field and form an aggregation state, reducing the reflection and scattering of light, and the light transmittance significantly increases. Large and thus appear bright.
3. DLC dimming glass
DLC all-solid-state flexible dye liquid crystal film (Dye liquid crystal) adds special dichroic dye molecules to the liquid crystal material. In the absence of an electric field, the long axes of the liquid crystal molecules and the long axes of the dichroic dye molecules are parallel to ITO. On the surface of the film, light will be basically absorbed by the dye liquid crystal, and the film will appear in a dark opaque state; when an electric field is applied, the liquid crystal molecules and dichroic dye molecules will rotate in the direction of the electric field. When the liquid crystal molecules and dichroic dye molecules When the short axis is perpendicular to the film surface, the amount of light absorbed by the dye is reduced, and the film becomes light-colored and transparent.
3. Application cases
Zhonghe Technology can provide smart window and canopy application solutions. In terms of sun shading, it can effectively adjust the intensity of sunlight entering the car (shading coefficient 0.12-0.6); in terms of heat insulation, it can effectively block more than 70% of infrared rays and 99% of ultraviolet rays; in terms of energy saving, it can effectively block sunlight in summer Direct sunlight can prevent indoor heat loss and reduce energy consumption in winter; the solution can be convenient, saving the installation and use costs of sunshades, and can quickly switch between sunshade and lighting needs; in terms of explosion-proof, it can improve the safety performance of ordinary glass. It effectively prevents glass from self-explosion and has high impact resistance; in terms of sound insulation, the sound insulation and noise reduction rate reaches more than 40%; it can realize various control schemes such as voice, light sensor, temperature control, remote control and so on.
Mass-produced models: Geely LEVC L380, Ford Electric Horse (premium product), CRRC Intelligent Rail, Xiamen Jinlong MC digital bus, Nanjing Jinlong double-decker sightseeing bus, American Pebble RV.
Designated projects: GAC Toyota Camry (high-quality), American OASIS RV, American Lippert RV, Yutong Dolphin sightseeing bus.
1. Geely LEVC L380
2. Ford Electric Horse
3. American pebble RV
4. Yutong T7
5. Golden Dragon Digital Bus
6. CRRC Intelligent Rail
About Zhonghe Technology
Zhonghe Technology (Changzhou) Co., Ltd. is a high-tech company invested and established by Jiangsu Chenguang Paint Group, specializing in the development and application of liquid crystal electronic technology and electronic energy-saving technology. The company has first-class ITO transparent conductive film and EPC electrochromic film , PDLC liquid crystal dimming film, DLC dye liquid crystal film and other scientific research and technology teams in the field of new optoelectronic materials, have established industry-university-research cooperation relationships with many well-known domestic universities and research institutes such as Tsinghua University and Peking University.
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