Shelf interactive power control circuit

Abstract

A shelf power control circuit includes a power source, a status sensor, a status detection circuit, a switch, and a control signal detection circuit. The power source is used to supply power, and the status sensor is used to detect a status change of products on a shelf. The status detection circuit is coupled to the status sensor and the power source for generating an enabling signal when the status sensor detects the status change of the products. The switch is coupled to the power source and the status detection circuit for being turned on when receiving the enabling signal and turned off when receiving a disabling signal. The control signal detection circuit is coupled to the switch for generating the disabling signal when the control signal detection circuit is turned on.

What is claimed is: 
     
         1 . A shelf power control circuit comprising:
 a power source configured to supply power;   a status sensor configured to detect a status change of products on a shelf;   a status detection circuit coupled to the status sensor and the power source, and configured to generate an enabling signal when the status sensor detects the status change of the products;   a switch coupled to the power source and the status detection circuit, and configured to be turned on when receiving the enabling signal and turned off when receiving a disabling signal; and   a control signal detection circuit coupled to the switch, and configured to generate the disabling signal when the control signal detection circuit is activated.   
     
     
         2 . The shelf power control circuit of  claim 1 , wherein the status sensor is a piezoelectric sensor. 
     
     
         3 . The shelf power control circuit of  claim 1 , wherein the status sensor is a triboelectric sensor. 
     
     
         4 . The shelf power control circuit of  claim 1 , further comprising:
 a pressure sensor configured to detect an amount of products on the shelf; and   an application specific integrated circuit (ASIC) coupled to the switch and the pressure sensor, and configured to convert the amount of products on the shelf to an existing quantity of products on the shelf.   
     
     
         5 . The shelf power control circuit of  claim 4 , further comprising:
 a micro control unit (MCU) coupled to the application specific integrated circuit and the control signal detection circuit, and configured to turn on the control signal detection circuit after receiving the existing quantity of products on the shelf from the application specific integrated circuit.   
     
     
         6 . The shelf power control circuit of  claim 5 , further comprising:
 an electronic paper or other display device coupled to the MCU, and configured to receive information of the products from the MCU and display the information of the products.   
     
     
         7 . The shelf power control circuit of  claim 6 , wherein the electronic paper or other display device is coupled to the MCU through a serial peripheral interface (SPI). 
     
     
         8 . The shelf power control circuit of  claim 5 , further comprising a server linked to the MCU, and configured to receive the existing quantity of products on the shelf from the MCU. 
     
     
         9 . The shelf power control circuit of  claim 8 , wherein the server is linked to the MCU through Bluetooth. 
     
     
         10 . The shelf power control circuit of  claim 8 , wherein the server is linked to the MCU through Wi-Fi. 
     
     
         11 . The shelf power control circuit of  claim 5 , wherein the ASIC is coupled to the MCU through an Inter-Integrated Circuit (I2C). 
     
     
         12 . The shelf power control circuit of  claim 5 , further comprising a first resistor having a first end coupled to an output end of the switch, and a second end coupled to an output end of the status detection circuit. 
     
     
         13 . The shelf power control circuit of  claim 12 , wherein the control signal detection circuit comprises a switch. 
     
     
         14 . The shelf power control circuit of  claim 13  wherein the switch of the control signal detection circuit is an N-type metal-oxide-semiconductor field-effect transistor (NMOS). 
     
     
         15 . The shelf power control circuit of  claim 14 , wherein the NMOS has a drain coupled to the second end of the first resistor, a source coupled to a ground, and a gate coupled to the MCU. 
     
     
         16 . The shelf power control circuit of  claim 15 , further comprising a second resistor coupled between the gate of the NMOS and the ground. 
     
     
         17 . The shelf power control circuit of  claim 5 , wherein the MCU is coupled to an output end of the switch. 
     
     
         18 . The shelf power control circuit of  claim 1 , further comprising a third resistor coupled between the power source and an output end of the status detection circuit.