CINNO Research Industry Information. Toray Co., Ltd. is headquartered in Chuo-ku, Tokyo, and has started mass production and sales of "RAYBRID®", a photosensitive conductive material. The large size and curved surface realize easy identification and operation of the on-board display, and its comfort contributes to improving driving comfort and development of interior space. It has been adopted by some display modules, and plans to further expand sales in the future.
RAYBRID® uses Metal Mesh electrodes.
Toray has been using the photosensitive conductive material RAYBRID® for Lead Wiring in smartphones since 2012, and has been committed to the pursuit of low resistance and fine wiring to achieve large screens and narrow bezels.
In the past, ITO electrodes were used for vehicle display screens. If the screen size is large, it is difficult to sense the contact part, and problems such as slow response and incorrect operation may occur.
The photosensitive conductive material developed this time is a material that forms extremely fine wires of 2-4um by dispersing silver particles. Because it has lower resistance than the ITO electrode, it is applied to Metal Mesh electrodes, and the electrodes cannot be seen with the naked eye, so that large-size display screens with extremely high visibility can be produced. In addition, when forming a Metal Mesh electrode, a whole circuit can be formed, which simplifies the process flow. Because this material can meet the high visibility and reliability requirements of automotive materials, it has been well received by some panel manufacturers, and some panel manufacturers have begun to officially introduce and mass-produce this material.
Flexible touch sensor
In addition, this material also has good flexibility. Using transparent PI developed by Toray as a thin-film substrate and combining this material, it can be made into a thin and lightweight flexible touch sensor. , Can finally be applied to curved display. The installation of a higher-spec instrument panel can improve the comfort and convenience of the interior space of the driverless era, and it is expected that the demand for automotive curved display screens will further expand in the future.
Toray uses the "power of materials" to contribute to the development of the next generation of automotive interior space.
The features of this advanced photosensitive conductive material RAYBRID® are shown below.
1. Improve the visibility of the screen by super fine line.
The process is simple and does not require special equipment. It can form a 2-4um cable stably, thereby obtaining a high-end display screen that is not easy to see, has high visibility. In addition, when a metal mesh electrode is used, the sensing sensitivity is improved by 30% compared with conventional products (Note).
2. By using low-resistance materials to improve contact sensitivity, large screens are obtained.
Due to the low resistance of this material, the sensitivity of the contact area in the center of the display can be improved, and it can be applied to large screens of 8 inches or more that are difficult to achieve with traditional technology.
3. It has high flexibility and can be applied to curved display screens.
The diameter of this material is 2mm, and the resistance will not change even after repeated bending 200,000 times. By combining with a transparent thin-film substrate, a curved display screen that can be promoted in the future can be produced.
4.Meet the strict standards and high reliability of the vehicle.
Not only has it achieved results and achievements in the field of smart phones, but it also has stringent standards such as high temperature and high humidity that meet the requirements of automotive display screens.