Patent ID: 9519362
Filing Date: 2016-12-13
CPC Classification: B60K,G06F

Claim Text:
1. A display apparatus having a knob, comprising: a screen on which an image is displayed; a projector projecting the image to the screen; a knob rotatably disposed at one side of the screen, wherein the knob includes: a knob rotator; a plurality of reference protrusions provided at a first distance along an outer circumference of the knob rotator; and a plurality of directional protrusions provided at a second distance along the outer circumference of the knob rotator; a vibration sensor sensing a vibration from the knob and outputting a vibration signal; a controller configured to determine a rotational direction and a rotational amount of the knob based on the vibration signal output from the vibration sensor, a first vibrator configured to generate a first vibration by friction with the reference protrusions; and a second vibrator configured to generate a second vibration by friction with the directional protrusions, wherein the vibration sensor senses the first vibration to output a first pulse and senses the second vibration to output a second pulse, and wherein a level of the first pulse is different from a level of the second pulse and an output timing of the first pulse is different from an output timing of the second pulse.