Light scanning type positioning device based on annular LCD feature

• Main Author: WU YIJI
• Format: Patent
• Language: Chinese; English
• Published: 09.01.2018
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention discloses a light scanning type positioning device based on annular LCD features; the positioning device is high in positioning precision and low in cost; the positioning device is applied in the following steps: 1, the light scanning type positioning device based on annular LCD features comprises a signal source providing positioning lights and a to-be-positioned mobile device; 2, the signal source uses the LCD shading feature to form a scanning light beam: a light source is in the center of an annular LCD display screen and always shines; the annular LCD shades most lights, only one column of pixels are kept for light transmission, and the column of pixels of the LCD can be controlled to scan the whole 360 degrees, thus forming the scanning light beam; 3 the mobile device can receive the light beam emitted by the signal source, and calculates to obtain the time duration from starting scanning to the reception time of an optical reception module receiving the light beam,wherein the left signal