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:
Jun. 09, 2009
Filed:
May. 18, 2005
Junichi Mishima, Iwata, JP;
Tomonori Koizumi, Hamamatsu, JP;
Liping LU, Zhejiang, CN;
Yamaha Corporation, Hamamatsu-Shi, JP;
Abstract
In an electronic keyboard instrument () being an example of a musical performance apparatus having a musical operation unit, a unique musical performance apparatus is formed by an outer face of its exterior (), and part or a whole of the outer face of the exterior () is formed as a temperature sensitive discolorable layer, for example, as shown by the hatched outer faces of upper side panels (), lower side panels (), and a back panel (), so that at least part of the exterior () changes in color according to a change in environmental temperature or a temperature change caused by radiant heat by illumination of lights (). In order to forcibly discolor the temperature sensitive discolorable layer of the exterior (), it is preferable that heaters or Peltier modules are incorporated in the exterior () and electricity is supplied thereto for enabling heating, or heating and cooling.