From October 10 to 12, 2025, the 51st International Symposium and Exhibition on Electromagnetic Measurement Technology, Standards, and Products was held in Yueqing, Zhejiang. As an annual benchmark event in the field of electrical energy measurement, this year’s conference, themed “Fulfilling the Mission of Measurement, Exploring Integration to Empower Carbon Initiatives”, brought together authoritative institutions and leading enterprises in the industry, including State Grid Corporation of China, China Southern Power Grid, and China Electric Power Research Institute. As a global one-stop provider of HMI display solutions, Tongtai Display actively participated in the exhibition and showcased its core products at booths T39-T40, including single-phase/three-phase electricity meters for State Grid/China Southern Power Grid, overseas COG electricity meters, smart IoT electricity meters, and data collectors/specialized transformer meters. These exhibits demonstrated the company’s technical accumulation in the field of power display.
01 Collaborating with Partners to Blueprint the Future of Electrical Energy Measurement
Jiangxi Tongtai Display Technology Co., Ltd. is a subsidiary of Holitech Technology Co., Ltd. (Stock Code: 002217). It focuses on the R&D and manufacturing of liquid crystal displays (LCDs), touch displays, and intelligent terminal products. The company possesses the capabilities of product design, production, and sales, providing customers with customized display products and solutions. Its product range covers LCD screens, display modules, touch screens, as well as various display applications such as smart wearables, in-vehicle systems, and retail terminals. These products have been applied in multiple fields including instrumentation, smart home appliances, communication equipment, industrial control and medical devices, automotive electronics, and digital products. The company has obtained ISO9001, TS16949, and ISO14001 certifications, and maintains business cooperation with domestic and foreign enterprises such as Samsung, Sharp, LG, Haier, Midea, and Hikvision.
02 Multi-Scenario Display Solutions Demonstrating Technical Accumulation
During the exhibition, booths T39-T40 attracted a large number of visitors for communication and interaction, reflecting the continuous vitality and technological potential of the electrical instrumentation industry.
1.Display Products for Single-Phase/Three-Phase Electricity Meters (State Grid/China Southern Power Grid)
As a core HMI component of electricity meters, this product complies with the smart electricity meter technical standards of State Grid. It is used for real-time display of electricity consumption data, equipment status, and operation information. Adopting a segment LCD screen and an LCD + PIN pin structure, it features a simple structure and stable connection. Suitable for scenarios such as single-phase and three-phase electricity meters of State Grid/China Southern Power Grid, it boasts characteristics including wide temperature range, wide viewing angle, low power consumption, and excellent compatibility.
2.Display Modules for Smart IoT Electricity Meters
Custom-designed for remote terminal data collectors of electricity meters and Type-II specialized transformer equipment, this product adopts a 160×160 dot-matrix module, supporting the display of numbers, text, and images. Equipped with a multi-stage temperature-compensated driver IC, it offers wide viewing angle, high contrast, and anti-interference performance, making it suitable for complex environments such as high and low temperatures.
Tongtai Display has over 20 years of experience in the black-and-white LCD field. It emphasizes technical accumulation and product R&D, forming product features of mature technology, flexible customization, and stable performance. The company is equipped with multiple fully automated production lines for front-end, middle-end, module manufacturing, and pin mounting, possessing corresponding manufacturing capabilities. In terms of electricity meter display products, it focuses on wide temperature adaptability and long-term reliability. Some segment LCD products can operate stably in high-temperature and high-humidity environments for up to 16 years, meeting the relevant standards of State Grid and China Southern Power Grid, and have obtained certification from the State Grid Metrology Center, providing a solid guarantee for energy metering.
03 Participating in Standard Discussions to Gain Insights into Industry Technology Trends
During the conference, plenary sessions, sub-technical committee meetings, and technical seminars were held, covering industry topics such as the construction of new power systems, intelligent metering, and low-carbon transformation. Tongtai Display participated in the exchanges throughout the process. With nearly 20 years of technical accumulation in the field of LCD displays for electricity meters, it has become a benchmark supplier of core components in the electricity meter industry.
To empower the upgrading and iteration of industry products, the company has deeply engaged in the R&D of key projects of State Grid and China Southern Power Grid in 2025, covering the development of LCD screens for the entire product series, including the 2025 version of smart electricity meters, smart integrated terminals, smart IoT electricity meters, smart guide-rail meters, gateway electricity meters, and Dianhong district terminals, providing customers with efficient and convenient one-stop solutions.
Looking ahead, Tongtai Display will continue to focus on cutting-edge industry trends, closely monitor emerging businesses such as “Artificial Intelligence + Metrology” and electrical carbon metering meters that State Grid and China Southern Power Grid are about to launch. It will actively layout and participate in the R&D of supporting LCD screens, and with forward-looking technology and core strength, contribute to the innovative development of the industry!
