Level shifter and projector

Patent metadata

Field	Value
Publication number	US-10102791-B2
Application number	US-201615046208-A
Country	US
Kind code	B2
Filing date	Feb 17, 2016
Priority date	Mar 3, 2015
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

A level shifter included in a device includes: an external interface power unit configured to supply a power voltage corresponding to electrical input-output characteristics of an interface circuit of an external device; an internal interface power unit configured to supply a power voltage corresponding to electrical input-output characteristics of an internal interface circuit in the device; a power switch unit configured to control power supply to the external interface power unit according to an electrical signal from the external device; and a selector unit configured to control conduction between the interface circuit of the external device and the internal interface circuit, wherein the selector unit is configured to transition to an operable state when the external interface power unit is supplied with power.

First claim

What is claimed is:

1. A level shifter included in a device, the level shifter comprising:
an external interface power unit configured to supply a power voltage corresponding to electrical input-output characteristics of an interface circuit of an external device;
an internal interface power unit configured to supply a power voltage corresponding to electrical input-output characteristics of an internal interface circuit in the device;
a power switch unit configured to control power supply to the external interface power unit according to an electrical signal from the external device; and
a selector unit configured to control conduction between the interface circuit of the external device and the internal interface circuit,
wherein the selector unit is configured to transition to an operable state when the external interface power unit is supplied with power.

Assignees

• Casio Computer Co Ltd

Inventors

• Kato Koichi

Classifications

• G09G3/001

  using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background (slide projectors per se G03B23/00 = 42 HP) · CPC title

• G09G3/2092 Primary

  Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165) · CPC title

• G06F1/3218

  of display devices · CPC title

• G06F1/3265

  Power saving in display device · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title