VTech Write & Learn Spellboard Advanced Manual de usuario descargar pdf (Pagina 19)

US

8,850,241

B2

1

MULTI-STAGE

POWER

ADAPTER

CONFIGURED

TO

PROVIDE

LOW

POWER

UPON

INITIAL

CONNECTION

OF

THE

POWER

ADAPTER

TO THE

HOST

DEVICE

AND

HIGH

POWER

THEREAFTER

UPON

NOTIFICATION

FROM

THE

HOST

DEVICE

TO THE

POWER

ADAPTER

RELATED

APPLICATIONS

This

application

is

a

continuation

of

and

claims

priority

to

US.

patent

application

Ser.

No.

13/471,412,

?led

May

14,

2012,

entitled

“Multi-Stage

Power

Adapter”

and

further

claims

priority

under

35

U.S.C.

§1

19(e)

to

the

following

US.

Provisional

patent

applications,

the

entire

disclosures

of

each

of

these

applications

being

incorporated

by

reference

in

their

entirety:

US.

Provisional

Patent

Application

No.

61/

606,333,

?led

Mar.

2,

2012,

and

titled

“Usage and

Authentication,”

US.

Provisional

Patent

Application

No.

61/613,745,

?led

Mar.

21,

2012,

and

titled

“Usage

and

Authentication,”

and

US.

Provisional

Patent

Application

No.

61/607,451,

?led

Mar.

6,

2012,

and

titled

“Spanaway

Provisional.”

BACKGROUND

Mobile computing

devices

have

been

developed

to

increase

the

functionality

that

is

made

available

to

users

in

a

mobile

setting.

For

example,

a

user

may

interact

with

a

mobile

phone,

tablet

computer,

or

other

mobile

computing

device

to

check

email,

surf

the

web,

compose

texts,

interact

with

applications,

and

so

on.

One

challenge

that

faces

devel

opers

of

mobile

computing

devices

is

ef?cient

power

man

agement

and

extension

of

battery

life.

For

instance,

the

small

form

factor

of

many

mobile

computing

devices

may

compel

designs

in

which

power

connections

are

kept

relatively

small

in

size.

Accordingly,

developers

may

be

further

concerned

with

ensuring

that

adapters

designed

for

use

with such

small

form

power

connections

are

safe

and

supply

the

proper

amount

of

power

to

the

device.

SUMMARY

Multi-stage

power

adapter

techniques

are

described.

In

one

or

more

embodiments,

a

power

adapter

for

a

device

is

con

?gured

to

selectively

switch

between

a

relatively

low

power

supply

and

a

relatively

high

power

supply.

The

low

power

supply

may

be

employed

upon

initial

connection

of

the

adapter

to

a

ho

st

device

to

ensure

that

the

adapter

is

safe

when

disconnected

and

does

not

supply

full

power

before

the

device

is

ready

to

receive

the

high

power

supply.

The

low

power

supply

may

supply

enough

power

for

the

host

device

to

detect

the

connection

of

the

adapter

and

establish

initial

com

munication

with

the

adapter.

A

switch

to

the

high

power

supply

by

the

adapter

may

then

occur

in

response

to

a

noti?

cation

from

the

host

device

that

indicates

the

host

device

is

ready

for

the

high

power

supply.

The

switch

to

high

power

supply

enables

normal

operation

of

the

host

device.

This

Summary

is

provided

to

introduce

a

selection

of

con

cepts

in

a

simpli?ed

form

that

are

further

described

below

in

the

Detailed

Description.

This

Summary

is

not

intended

to

identify

key

features

or

essential

features

of

the

claimed

sub

ject

matter,

nor

is

it

intended

to

be

used

as

an

aid

in

determin

ing

the

scope

of

the

claimed

subject

matter.

BRIEF

DESCRIPTION

OF

THE

DRAWINGS

The

detailed

description

is

described

with

reference

to

the

accompanying

?gures.

In

the

?gures,

the

left-most

digit(s)

of

20

25

35

40

45

50

55

60

65

2

a

reference

number

identi?es

the

?gure

in

which

the

reference

number

?rst

appears.

The

use

of

the

same

reference

numbers

in different

instances

in

the

description

and

the

?gures

may

indicate

similar

or

identical

items.

Entities

represented

in

the

?gures

may

be

indicative

of

one

or

more

entities

and

thus

reference

may

be

made

interchangeably

to

single

or

plural

forms

of

the

entities

in

the

discussion.

FIG.

1

is

an

illustration

of

an

environment

in

an

example

implementation

that

is

operable

to

employ

the

techniques

described

herein.

FIG.

2

depicts

an

example

implementation

of

an

input

device

of FIG.

1

as

showing

a

?exible

hinge

in

greater

detail.

FIG.

3

depicts

an

example

implementation

showing

a

per

spective

view

of

a

connecting

portion

of

FIG.

2

that

includes

mechanical

coupling

protrusions

and

a

plurality

of

commu

nication

contacts.

FIG.

4

depicts

an

example

power

adapter

for

the

computing

device

of

FIG.

1 in

greater

detail.

FIG.

5

depicts

an

example

procedure

in

accordance

with

one

or

more

embodiments.

FIG.

6

depicts

another

example

procedure

in

accordance

with

one

or

more

embodiments.

FIG.

7

illustrates

an

example

system

including

various

components

of an

example

device

that

can

be

implemented

as

any

type

of

computing

device

to

implement

embodiments

of

the

techniques

described

herein.

DETAILED

DESCRIPTION

Overview

Ensuring

that

adapters

designed

for

use

with such

small

form

power

connections

of

modern

host

devices

are

safe

and

supply

the

proper

amount

of

power

to

the

device

can

present

challenges.

For

instance,

traditional

adapters

that

supply

a

constant

power

level

may

be

dangerous

and

susceptible

to

shorting

out

if

exposed

connections

are

contacted

inadvert

ently

by

a

user

or

object

other

than

the

corresponding

host

device.

Multi-stage

power

adapter

techniques

are

described

in

which

a

power

adapter

for

a

device

is

con?gured

to

selectively

switch

between

a

relatively

low

power

supply

and

a

relatively

high

power

supply.

The

low

power

supply

may

be

employed

upon

initial

connection

of

the

adapter

to

a

host

device

to

ensure

that

the

adapter

is

safe

when

disconnected

and

does

not

supply

full

power

before

the

device

is

ready

to

receive

the

highpower

supply.

The

low

power

supply

may

supply

enough

power

for

the

host

device

to

detect

the

connection

of

the

adapter

and

establish

initial

communication

with

the

adapter.

A

switch

to

the

high

power

supply

by

the

adapter

may

then

occur

in

response

to

a

noti?cation

from

the

host

device

that

indicates

the

host

device

is

ready

for

the

high

power

supply.

The

switch

to

high

power

supply

enables

“normal”

operations

of

the

host

device.

In

the

following

discussion,

an

example

environment

is

?rst

described

that

may

employ

the

techniques

described

herein.

Example

procedures

are

then

described

which

may

be

performed

in

the

example

environment

as

well

as

other

envi

ronments.

Consequently,

performance

of

the

example

proce

dures

is

not

limited

to

the

example

environment

and

the

example

environment

is

not

limited

to

performance

of

the

example

procedures.

Example

Operating

Environment

FIG.

1

is

an

illustration

of

an

environment

100

in

an

example

implementation

that

is

operable

to

employ

the

tech

niques

described

herein.

The

illustrated

environment

100

includes

an

example

of

a

computing

device

102

that

is

physi

cally

and

communicatively

coupled

to

an

input

device

104

via

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