Display apparatus and a driving method for a display apparatus

27 Pages·2013·1.59 MB·English

USOO568928OA
United States Patent [191 [11] Patent Number: 5,689,280
Asari et al. [45] Date of Patent: Nov. 18, 1997
[54] DISPLAY APPARATUS AND A DRIVING O 507 061 10/1992 European Pat. O?“. .
METHOD FOR A DISPLAY APPARATUS O 569 974 11/1993 European Pat. 01f, .
OTHER PUBLICATIONS
[75] Inventors: Goro Asari, Yokohama; Yutaka
Nakagawa, Isehara, both of Japan;
Scheifer et a1, “Active AddressingTM of STN displays for
Temkar N. Ruckmongathan,
high-performance video applications,” Display, v. 14, No. 2,
Bengalore, India; Takeshi Kuwata,
Apr. 1993.
Yokohama, Japan ,
(List continued on next page.)
[73] Assignee: Asahi Glass Company Ltd., Tokyo,
Japan
Primary Examiner-Steven Saras
Attorney, Agent, or Firm-Oblon, Spivak, McClelland,
[21] Appl. No: 7149493 Maier & Neustadt, RC.
[22] Filed: Sep. 16, 1996 [57] ABSTRACT
Related US. Application Data A display apparatus in which the light transmittance of a
pixel selected by a scanning electrode and a data electrode
[63] Continuation of Ser. No. 219,926, Mar. 307 1994, aban is changed in correspondence with a difference of voltages
doned. applied to the scanning electrode and the data electrode has
[30] Foreign Application Priority Data a display panel having a plurality of scanning electrodes and
a plurality of data electrodes, a signi?ed video signal fonn
Mar. 30,1993 [JP] Japan .................................. .. 5095575 ing device for forming signi?ed video signals by distributing
1111.23, 1993 [JP] Japan .................................. .. 5-202926 digital video signals in a picture to subpictures having the
same number as bits each having a bit signi?cance; an
[51] Int. GL6 ..................................................... .. G09G 3/36
orthogonal function generator for generating orthogonal
[52] US. Cl. ................. .. . 345/89; 345/95; 345/100 function signals having substantial orthogonality; an
[58] Field of Search ................................ .. 345/84, 87, 88, orthogonal transformation signal generator for receiving the
345/89, 94, 95, 96, 97, 98, 99, 100, 208,
signi?ed video signals and the orthogonal function signals to
147-148, 152, 204, 200, 211, 212; 349/33,
operate and output data signals; a scanning voltage generator
34’ 36’ 39 for receiving scanning signals to apply scanning voltages to
. the scanning electrodes of the display panel; and a data
[56] References Clted voltage generator for receiving data signals to apply data
U.S. PATENT DOCUMENTS voltages to the data electrodes of the display panel, wherein
_ the scanning voltage generator and the data voltage genera
.................................. .. 345/89 tor are such ones that the peak value ofa driving voltage’ in
5,189,406 2/1993 Humphtie's‘et a1. .................... .. 345/97 “ch of the subpictures’ aPPliad t° the display Pancl as a
5:250:937 10/1993 Kikuo et al. . . . . . . . . . . . . .. 345/94 Voltag? di?er?nce between the scanning Voltage and the data
5,459,495 10/1995 Scheffer ................................ .. 345/147 Voltage corresponds to a Signi?cant: Value of a bit of ‘b6
digital video signals.
FOREIGN PATENT DOCUMENTS
0 319 291 6/1989 European Pat. Off. . 12 Claims, 15 Drawing Sheets
15
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5,689,280
Page 2
OTHER PUBLICATIONS “New Addressing Techniques for Multiplexed Liquid Crys
“Some New Addressing Techniques for RMS Responding aladhglgégiz ’Pr:c);ed€'l:é ofRtltllzkgggstgz73 33:3 N‘v'
Matrix LCD’s” by T.N. Ruckmongathan. Thesis Submitted ’ ’ ' ’ '
for the Degree of Doctor Philosophy, Dept. of Electrical 1988 Int’l Display Research Conference, “A Generalized
Communication Engineering Indian Institute of Science, Addresssing Technique for RMS Responding Matrix
Feb. 1988. LCDS”, by T.N. Ruckmongathan, pp. 80-85.

US. Patent Nov. 18,1997 Sheet 2 of 15 5,689,280
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US. Patent Nov. 18, 1997 Sheet 4 of 15 5,689,280
FIGURE
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US. Patent Nov. 18, 1997 Sheet 5 bf 15 5,689,280
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US. Patent N0v.18,1997 Sheet 6 of 15 5,689,280
FIGURE 7
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U.S. Patent Nov. 18, 1997 Sheet 7 0f 15 5,689,280
FIGURE 8
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US. Patent Nov. 18, 1997 Sheet 8 of 15 5,689,280
FIGURE 9
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