Photodynamic watch: A watch with a built-in system that converts light energy into electrical energy. Various types of watches powered only by solar cell systems.
It is a truly environmentally friendly product because it saves limited earth resources and reduces pollution by using batteries that do not have to be discarded.
Electronic watch (quartz watch): The electronic watch is a watch with electronic components inside. It is generally divided into liquid crystal display digital and quartz pointer type. However, its frequency stability is not good. Most of the current electronic watches use quartz crystal. Oscillator, because it is very accurate, as for the future, the electronic watch will not develop a better oscillator.
Mechanical watches “: the most high-end, valuable, worthy collection of watches. Mechanical watches can usually be divided into the following two types: hand-made and automatic watch (AUTOMATIC). The power source of these two machines is relying on the machine The spring in the core is the power, which drives the gear and pushes the hand. The way of power source is different. The mechanical watch of the hand is made by manual refining. The thickness of the movement is thinner than that of the general automatic refining. The weight of the whole watch is lighter. The watch that is automatically refining is the power generated by the left and right swing of the automatic disc at the bottom of the movement to drive the spring to generate energy, but the thickness of the opposite watch will be higher than the average hand. The watch has a thicker surface. The advantage of the mechanical watch is that it can be used for a long time by regular maintenance of the oil; but the disadvantage is that the error is larger than the quartz watch, because the quality of the production is high and the movement inside the watch is vulnerable. The influence of the gravitational force produces an error. Usually the error of the mechanical watch is calculated by how many seconds per day, and the error of the quartz watch is calculated by how many seconds per month, so a good mechanical watch may need to be used. year Even built in more than a decade.
