Image display method for a portable display device

Patent metadata

Field	Value
Publication number	US-9996897-B2
Application number	US-201615187122-A
Country	US
Kind code	B2
Filing date	Jun 20, 2016
Priority date	Nov 18, 2015
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

An image display method for a portable display device to be implemented by a processing module includes: controlling the portable display device to display an image in a default position within a display area; estimating a displacement distance of the portable display device during an (X+1) th unit time period, based at least on a number (N) of displacement distances of the portable display device respectively during (N) number of immediately previous unit time periods or on accelerations of the portable display device respectively associated with (X−1) th and (X) th unit time periods; and controlling the portable display device to shift the image with respect to the display area based on the displacement distance estimated thereby.

First claim

What is claimed is:

1. An image display method for a portable display device to be implemented by a processing module, the portable display device including a detection module, said image display method comprising the steps of:
(A) controlling the portable display device to display an image in a default position within a display area of the portable display device, there being a predetermined minimum distance between boundaries of the image and the display area when the image is in the default position;
(B) estimating a displacement distance of the portable display device in a first direction during an (X+1) th unit time period, based at least on a number (N) of displacement distances of the portable display device in the first direction respectively during (N) number of immediately previous consecutive unit time periods as obtained by the detection module or on accelerations of the portable display device respectively associated with (X−1) th and (X) th unit time periods as obtained by the detection module, where (X) is a variable and (N) is a positive integer;
(C) calculating, based on the displacement distance estimated in step (B) and a predetermined offset parameter, an offset displacement distance associated with the image; and
(D) controlling the portable display device to shift the image by the offset displacement distance with respect to the display area in a second direction opposite to the first direction;
wherein, in step (B), the displacement distance of the portable display device in the first direction during the (X+1) th unit time period is obtained by the processing module based on the displacement distances of the portable display device in the first direction respectively during the (N) number of immediately previous consecutive unit time periods and on an autoregressive model;
wherein the autoregressive model is represented as

D
⋒

⁡

[

X
+
1

]

=

∑

i
=
1

N

⁢

⁢

α
i

·

D
⁡

[

X
+
1
-
i

]

,

where {circumflex over (D)}[X+1] represents the displacement distance of the portable display device in the first direction during the (X+1) th unit time period, α i represents a linear regression coefficient, and D[X+1−i] represents the displacement distance of the portable display device during an (X+1−i) th unit time period;
wherein, when N<X, the autoregressive model is represented as

[

w
1

0

⋯

0

0

w
2

0

⋮

⋱

0

0

w

X
-
N

]

1
/
2

⁡

[

D
⁡

[

N
+
1

]

⋮

D
⁡

[

N
+
k

]

⋮

D
⁡

[
X
]

]

=

Assignees

• Univ Chang Gung

Inventors

• WEI Jyh-Da
• Hsiao Hsu-Fu
• Tsai Chen-Cheng
• Liu yi-xin
• Liu Po-I
• SUNG Jiun-Shian

Classifications

• G06F1/1613

  for portable computers (cooling arrangements therefor G06F1/203; constructional details or arrangements for pocket calculators, electronic agendas or books G06F15/0216; constructional details of portable telephone sets: with several bodies H04M1/0202) · CPC title

• G06F3/0485

  Scrolling or panning · CPC title

• G09G3/20

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• G09G2340/0464

  Positioning · CPC title

• G06T3/20 Primary

  Linear translation of whole images or parts thereof, e.g. panning · CPC title