METHOD OF MANUFACTURING DISPLAY ELEMENT

• US 20100166946A1
• Filed: 05/01/2008
• Published: 07/01/2010
• Est. Priority Date: 05/25/2007
• Status: Active Grant

• Current Assignee: Konica Minolta Holdings Incorporated (Konica Minolta Inc.)
• Original Assignee: Konica Minolta Holdings Incorporated (Konica Minolta Inc.)
• Inventors: Kokeguchi, Noriyuki
• Granted Patent: US 8,999,430 B2
• Time in Patent Office: Days
• US Class Current: 427/58
• CPC Class Codes: C09D 11/36 based on non-aqueous solvents
• CPC Class Codes: G02F 1/1503 caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions
• CPC Class Codes: G02F 1/155 Electrodes
• CPC Class Codes: G02F 1/161 Gaskets; Spacers; Sealing of cells; Filling or closing of cells
• CPC Class Codes: G02F 2001/1518 Ferrocene compounds

Abstract

Disclosed is a method of manufacturing an electrochromic display element having improved durability. Specifically disclosed is a method of manufacturing a display element containing opposed electrodes and a porous layer which is arranged between the opposed electrodes and containing a metal oxide and an electrochromic dye supported on the metal oxide. The method contains the step of applying plural kinds of inks to the porous layer by an inkjet apparatus, wherein the inks are capable of uniformizing the amount of the electrochromic dye supported on the porous layer containing the metal oxide in one pixel of the display element.

Claims

1. A method of manufacturing a display element comprising opposed electrodes having therebetween a porous layer comprising an electrochromic dye and a metal oxide supporting the electrochromic dye, the method comprising the step of:

applying plural kinds of inks to the porous layer comprising the metal oxide in one pixel of the display element using an inkjet apparatus, the inks having a function to uniformize an amount of the electrochromic dye supported by the metal oxide.

2. The method of claim 1, wherein at least one of the plural kinds of inks comprises the electrochromic dye.

3. The method of claim 1, wherein at least one of the plural kinds of inks has a function to desorb the electrochromic dye from the porous layer comprising the metal oxide and to dissolve the electrochromic dye in the ink to uniformly diffuse the electrochromic dye in the pixel.

4. The method of claim 1, wherein at least one of the plural kinds of inks has a function to readsorb the electrochromic dye to the porous layer comprising the metal oxide.

5. The method of claim 1, wherein at least one of the plural kinds of inks has a function to disturb adsorption of the electrochromic dye to the porous layer comprising the metal oxide.

6. The method of claim 1, wherein the electrochromic dye is at least one compound selected from the group consisting of a compound represented by Formula (A), a compound represented by Formula (B) and a metal complex having a ligand represented by Formula (C):

7. The method of claim 1, wherein the display element is manufactured by planarly arranging display regions having substantially different color hues from each other by separately applying the electrochromic dyes using an inkjet method, and performs color display.

8. The method of claim 7, wherein the display element comprises a silver salt electrolyte and a white scattering material between the opposed electrodes and performs a multicolor display of three or more colors containing a black display, a white display and a display of a color other than black by a driving operation using the opposed electrodes.