The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 19, 2023
Filed:
Jan. 27, 2021
Maxell, Ltd., Kyoto, JP;
Tomoki Yamamoto, Kyoto, JP;
Toshinori Sugiyama, Kyoto, JP;
Akio Misawa, Kyoto, JP;
Nobutaka Amada, Kyoto, JP;
Nagayasu Tsutsumi, Kyoto, JP;
Yuji Fujita, Kyoto, JP;
Souta Sato, Kyoto, JP;
MAXELL, LTD., Kyoto, JP;
Abstract
Provided is a head-up display apparatus capable of preventing damage due to sunlight and ensuring user convenience. A reflection mirror Mreflects an image created by a display panel and projects it onto a display region. A solar radiation sensor detects a sunlight intensity when a position of sun exists within a predetermined detection range. A blocking mechanism forms a projected light path of an image between the display region and the display panel when being turned off, and blocks the projected light path of the image and an incident light path of the sunlight which is direction opposite thereto when being turned on. A protection processor controls ON/OFF of the blocking mechanism based on an estimated temperature of the display panel, which is estimated by using a sunlight intensity from the solar radiation sensor, luminance of a light source, and an ambient temperature.