PIEZO HAPTIC DRIVER AND METHOD FOR DRIVING THE SAME
First Claim
Patent Images
1. A piezo haptic driver, comprising:
- an analog signal processor driving a piezo element;
a controller transferring a control signal controlling the piezo element to the analog signal processor;
an interface controller determining a driving of the analog signal processor in response to at least one of an under voltage lock out (UVLO) signal and a thermal shutdown (TSD) signal.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed herein is a piezo haptic driver capable of preventing a malfunction and being more effectively operated and a method for driving the same. According to an exemplary embodiment of the present disclosure, a piezo haptic driver includes: an analog signal processor driving a piezo element; a controller transferring a control signal controlling the piezo element to the analog signal processor; an interface controller determining a driving of the analog signal processor in response to at least one of an under voltage lock out (UVLO) signal and a thermal shutdown (TSD) signal.
-
Citations
14 Claims
-
1. A piezo haptic driver, comprising:
-
an analog signal processor driving a piezo element; a controller transferring a control signal controlling the piezo element to the analog signal processor; an interface controller determining a driving of the analog signal processor in response to at least one of an under voltage lock out (UVLO) signal and a thermal shutdown (TSD) signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for driving a piezo element using an analog signal processor at least including an amplifier which outputs a control signal controlling the piezo element and a boost converter which transfers a driving voltage of the amplifier, the method comprising:
-
transmitting, by an interface controller, an enable signal so that the amplifier and the boost converter are turned on at different time; sensing at least one of an UVLO signal and a TSD signal and determining the UVLO signal and the TSD signal to be valid when at least one of the UVLO signal and the TSD signal is maintained for a predetermined time or more; and simultaneously stopping an operation of the amplifier and the boost converter if it is determined that at least one of the UVLO signal and the TSD signal is valid. - View Dependent Claims (12, 13, 14)
-
Specification