Cholesteric liquid crystal cell units are used for reflecting or transmitting incident light responsive to control signals. Another object is to reduce power consumption of a light emitting element, a light emitting device, and an electronic device. The electrode edges 5 are arranged above a control grid 7 when charging a photosensitive OPC 2. Each channel has an optical axis spatially separate from the optical axes of the other channels. A thread or a yarn have the fastening components around 0-360 degree on its surface. From said mass, layers and electrochemical composite layers can be produced that are subsequently impregnated with an electrolyte solution preferably of electrolytes dissolved in plasticizers for said matrix.