Light-dependent resistors (LDR) are usually composed of electrodes, photosensitive layers, and supporting structures. The photosensitive layer is the core component of the light-dependent resistor and plays a decisive role in its quality and working efficiency.

Light-dependent resistors (LDR), also known as photoresistors, refer to resistors that change their resistance value based on the intensity of incident light based on the photoelectric effect. They have advantages such as high sensitivity, strong anti-interference ability, fast response speed, small size, and long service life, and are widely used in lighting systems, consumer electronics, military, agriculture, and other fields.

There are a wide variety of light-dependent resistors. According to different spectral characteristics, they can be divided into infrared light-dependent resistors, ultraviolet light-dependent resistors, and visible light-dependent resistors. Based on different materials used in their production, they can be classified as silicon photoresistors, cadmium sulfide photoresistors, zinc sulfide photoresistors, and bismuth selenide photoresistors. With the increasing demand for applications of subdivided products in the future, the industry prosperity of China's light-dependent resistors will be enhanced.

Light-dependent resistors are typically composed of electrodes, photosensitive layers, and supporting structures. The photosensitive layer is the core component of the light-dependent resistor and plays a decisive role in its quality and working efficiency. In recent years, the technical maturity of China's light-dependent resistors has continuously improved, and many companies have obtained relevant patents, including "A Visible Light Photoresistor and Its Manufacturing Method", "A Photoresistor, Preparation Method, and Sensor Formed Therefrom", and "A Photoresistor with a Simple Installation Structure". With the continuous efforts of local companies in the future, high quality will become the mainstream trend in the development of China's light-dependent resistor industry.

According to the "In-depth Market Research and Investment Prospect Forecast Analysis Report on the Light-dependent Resistor (LDR) Industry from 2024 to 2029" released by the Xinsijie Industry Research Center, light-dependent resistors are mainly used in lighting systems, including railway signal lights, solar garden lights, sound-activated light switches, etc. Installing light-dependent resistors in street lighting systems allows street lights to adjust their brightness based on the intensity of natural light, offering advantages such as energy saving, environmental protection, and low maintenance costs. In 2023, the market size of urban street lighting in China reached nearly 73 billion yuan, with a year-on-year growth of over 10%. With the accelerating development of downstream industries in the future, the demand for light-dependent resistors in China will continue to increase.

The main manufacturers of light-dependent resistors in China include Zhongguangxue Group Co., Ltd., Nanyang Senba Photoelectric Co., Ltd., Shenzhen Longxinda Technology Co., Ltd., and Kangyao Electronics Co., Ltd. Zhongguangxue focuses on the research, development, production, and sales of special optical products, with main products including light-dependent resistors, optical lenses, prisms, optical accessories, etc. According to the semi-annual report of Zhongguangxue, in the first half of 2023, the company's optical components achieved revenue of 310 million yuan, accounting for 27.3% of its total business revenue.

Industry analysts from Xinsijie indicated that light-dependent resistors have broad application prospects in the field of lighting systems. With the rapid development of downstream industries in the future, their market demand will continue to increase. Benefiting from technological progress, the shipment volume of high-quality light-dependent resistors in China has increased. In terms of market competition, Zhongguangxue is a representative enterprise in China's light-dependent resistor industry, with its product quality ranking among the industry leaders.