Control device, optical scanning device, display apparatus, and control method

• Main Authors: TANAKA TOYOKI, HAYAKAWA ETSUJI
• Format: Patent
• Language: Chinese; English
• Published: 22.09.2020
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DISPLAY; EDUCATION; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; SEALS

A control device, an optical scanning device, a display apparatus, and a control method are provided to suppress noise in videos. The control device is used in a display apparatus of a laser scanningdisplay apparatus and includes a laser device, a current source that generates an electric current supplied to the laser device, and a controller that controls the current source to set a current value of the electric current supplied to the laser device. During a period for scanning a non-display area where no image is displayed, the controller sets the current value at a first drive current value that is less than a threshold current value at which the laser device starts oscillating; and during a period for scanning a portion with a luminance level of zero in a display area where an image is displayed, the controller sets the current value at a second drive current value that is greater than or equal to the first drive current value and less than the threshold current value. 本发明提供一种控制装置、光扫描装置、显示装置以及控制方法，其目的在于抑制