US007038656B2
(12)
United States Patent
(10) Patent N0.: (45) Date of Patent:
Liang et a1. (54)
ELECTROPHORETIC DISPLAY WITH DUAL-MODE SWITCHING
(75) Inventors: Rong-Chang Liang, Cupertino, CA (US); Jerry Chung, Mountain View, CA (US)
US 7,038,656 B2 May 2, 2006
4,741,988 A 4,995,718 A
5/1988 Van der Zande et a1. 2/1991 Jachimowicz et a1.
5,132,820 A
7/1992
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Someya et a1. ............. .. 349/43
(Continued)
(73) Assignee: SiPix Imaging, Inc., Fremont, CA (US)
FOREIGN PATENT DOCUMENTS
(*)
Notice:
Subject to any disclaimer, the term of this patent is extended or adjusted under 35
EP
USC 154(b) by 19 days.
Filed:
OTHER PUBLICATIONS
Cominsky, B. et al., “An Electrophoretic Ink For All-Printed Re?ective Electronic Displays”, Letters to Nature, pp. 253
Feb. 14, 2003
(65)
255 (1998).
Prior Publication Data
US 2004/0032391 A1
Feb. 19, 2004
(Continued) Primary ExamineriVijay Shankar
Related US. Application Data
(63) Continuation-in-part of application No. 10/222,036, ?led on Aug. 16, 2002. Int. Cl.
(52) (58)
US. Cl. .................................................... ..
(2006.01) 345/107
Field of Classi?cation Search .............. .. 345/ 107,
345/173, 205, 48, 84, 85; 359/296, 297; 430/20
See application ?le for complete search history.
(56)
(74) Attorney, Agent, or FirmiHowrey LLP
The present invention relates to an improved EPD which
comprises both the traditional up/down switching and the in-plane switching modes. In other words, the improved EPD has dual switching modes. The monochrome EPDs of the present invention are capable
red highlight can be shown in any selected areas of the
U.S. PATENT DOCUMENTS A 10/1971 Evans et a1. A 6/1972 Ota A 10/1972 Hathaway A 7/1975 Ota A 1/1978 Liebert A 6/1978 Carter et a1. A 8/1981 Chiang A * 11/1981 Muller et a1. ............. .. A 7/1987 Beilin Solomon I. et a1.
ABSTRACT
of displaying highlight color of choice which is different from the text. For example, white background, blue text, and
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Assistant ExamineriPrabodh Dharia
(57)
(51)
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(Continued)
(21) Appl. No.: 10/367,670 (22)
1 089 118 A2
display. Furthermore, the full color EPDs of the present invention are capable of displaying high contrast images of high color saturation. Both high quality black and white states are possible in the full color displays of the present invention. The EPDs of the present invention do not need
complex circuitry design, and are compatible with low cost
and high yield roll-to-roll manufacturing processes. 359/296
11 Claims, 18 Drawing Sheets
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'
translation) ?ciency_
'
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gg/Usgarch Repon (PCT/US04/04835) Date Dec‘ 2004
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*
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provided upon request). U.S. Appl. No. 09/606,654, ?led Jun. 28, 2000 (to be
provided upon request). * cited by examiner
U.S. Patent
May 2, 2006
Sheet 1 6f 18
US 7,038,656 B2
V FIG. 1 PRIOR ART
[I WHITE
E BLACK
FIG. 2A
FIG. 2B PRIOR ART ___*__A
I
I
[[5] RED GREEN
5 BLUE [I WHITE
FIG. 2C
FIG. 2D
PRIOR ART
PRIOR ART
II II I
I I
I I
I
I
U.S. Patent
May 2, 2006
Sheet 2 6f 18
\\
US 7,038,656 B2
\\ \\ \\| \\\\\\\\\\\‘\\~
WHITE STATE
FIG. 4A BLACK BLACK STATE
FIG. 4B BLACK
COLOR (RED) STATE
FIG. 4C BLACK
U.S. Patent
May 2, 2006
Sheet 3 6f 18
WHITE
iii-I: YELLOW BLACK
FIG. 4D
US 7,038,656 B2
U.S. Patent
May 2, 2006
Sheet 4 6f 18
US 7,038,656 B2
UV OR LIGHT
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U.S. Patent
May 2, 2006
Sheet 5 6f 18
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US 7,038,656 B2
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U.S. Patent
May 2, 2006
Sheet 6 6f 18
US 7,038,656 B2
BLACK
SIDE VIEW
FIG. 7A
WHITE
WHITE
WHITE
WHITE
TOP VIEW
FIG. 7B
BLACK
SIDE VIEW
FIG. 8A
TOP VIEW
FIG. 8B
U.S. Patent
May 2, 2006
Sheet 7 6f 18
US 7,038,656 B2
BLACK
SIDE VIEW
FIG. 9A
TOP VIEW
FIG. 9B
U.S. Patent
May 2, 2006
102
Sheet 8 6f 18
US 7,038,656 B2
102
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U.S. Patent
May 2, 2006
COLOR STATE
FIG. 10C V0"
WHITE STATE
FIG. 10D Von
BLACK STATE
FI G 1 0E V On
Sheet 9 6f 18
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US 7,038,656 B2
U.S. Patent
112
May 2, 2006
119
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119
Sheet 10 6f 18
US 7,038,656 B2
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FIG. 11B
U.S. Patent
May 2, 2006
Sheet 11 6f 18
US 7,038,656 B2
LOW V \
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COLOR STATE
FIG. 1 1 C - 2 COLOR STATE
FIG. 1 1C —1
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U.S. Patent
May 2, 2006
Sheet 12 6f 18
US 7,038,656 B2
BLACK STATE
FIG. 11E-2 BLACK STATE
FIG. llE-l
U.S. Patent 122
May 2, 2006
129
129 1
US 7,038,656 B2
122
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U.S. Patent
May 2, 2006
Sheet 14 6f 18
US 7,038,656 B2
LOW v\T 1 s//L0w~v >-
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FIG. 12D-2 WHITE STATE
FIG. 12D-1
U.S. Patent
May 2, 2006
Sheet 15 6f 18
US 7,038,656 B2
BLACK STATE
FIG. 12E~2 BLACK STATE
FIG. 12E-1
U.S. Patent
May 2, 2006
Sheet 16 6f 18
US 7,038,656 B2
U.S. Patent
May 2, 2006
Sheet 17 6f 18
US 7,038,656 B2
36.53.
U.S. Patent
May 2, 2006
Sheet 18 6f 18
US 7,038,656 B2
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