Method for scanning sequence selection for displays

• US 20040145553A1
• Filed: 10/17/2003
• Published: 07/29/2004
• Est. Priority Date: 10/22/2002
• Status: Abandoned Application

• Current Assignee: STMicroelectronics SRL (STMicroelectronics NV)
• Original Assignee: STMicroelectronics SRL (STMicroelectronics NV)
• Inventors: Sala, Leonardo, Ilardo, Santo, Gariboldi, Roberto, Domanin, Daniele
• Application Number:
  US10/688,074
• Publication Number:
  US 20040145553A1
• Time in Patent Office: Days
• US Class Current: 345/87
• CPC Class Codes: G09G 2310/0213 controlling the sequence of the scanning lines with respect to the patterns to be displayed, e.g. to save power
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/3622 using a passive matrix G09G3/3674 - G09G3/3696 take precedence

Abstract

The present invention refers to a method for scanning sequence selection for displays. In one scanning sequence selection for displays having a plurality of rows and columns, the plurality of rows and columns cross each other defining a plurality of optical elements having a first optical state and a second optical state in response to a first electric state and to a second electric state. The method includes the phases of driving the plurality of rows of the display according to a prefixed scanning ordering. The prefixed scanning ordering is predisposed by ordering every column of the columns so that the total switching number between said first electric state and said second electric state is minimized.

Claims

1. A method of scanning sequence selection for displays having a plurality of rows and columns, wherein said plurality of rows and columns cross each other defining a plurality of optical elements having a first optical state and a second optical state in response to a first electric state and to a second electric state, the method comprising:

driving said plurality of rows of said display according to a prefixed scanning ordering; and

ordering every column of said plurality of columns so that the total switching number between said first electric state and said second electric state is minimized.

2. The method according to claim 1 wherein said prefixed scanning ordering comprises ordering every column of said plurality of columns so that, if the state change between row “

i” and

row “

j”

is different from the state change between row “

i” and

row “

i+1”

, then the scanning change is effected between row “

i+1” and

row “

j”

.

3. The method according to claim 1 further comprising an ordering for every column of said plurality of columns by grouping the rows having the greatest number of said first electric state.

4. The method according to claim 1 further comprising an ordering for every column of said plurality of columns by grouping the rows having the greatest number of said second electric state.