Multiple channel speaker system for a portable computer
US5930376A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1997 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Mar 4, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/15
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A laptop computer is disclosed that includes an improved audio speaker system. The laptop computer typically is designed to have a first shell and a second shell that are attached together. Typically located within the first shell are a central processing unit, a keyboard, and other circuits such as a battery, a hard disk storage, and other connectors such as a PCMCIA slot. A video monitor is typically located in the second shell of the laptop computer and is coupled to the central processing unit via a system bust, or a video driver is provided that may be subsequently coupled to the CPU, such that the video driver drives the video monitor. Then, an audio speaker system is provided that in one embodiment is mounted in a back portion of the second shell that is located opposite the video monitor. This audio speaker system includes a transmission line comprising a first piezo speaker and a second piezo speaker. The transmission line is set at such a distance so that the first piezo speaker can cover a selected range of frequencies while the second piezo speaker is set at a second distance in such a manner as to skew the frequency response between the first piezo speaker and the seco…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.