# US 9,256,063 B2 · Fluidic, in particular electro-fluidic, display element with reservoir channels

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- Number: US 9,256,063 B2
- Document ID: US9256063B2
- Status: Granted
- Kind: B2
- Application number: 14/132,265
- Filed: 2013-12-18
- Published: 2015-06-18
- Granted: 2016-02-09
- Earliest claimed: 2013-12-18
- Assignees: Advanced Display Technology AG
- Applicants: advanced display technology AG
- Inventors: Oliver Mueller-Marc; Andriy Bitman; Markus Rawert; Dieter Jerosch
- Web page: https://patentgrep.com/patent/US9256063B2

## CPC

- G02B 26/005: {based on electrowetting}
- G02B 27/0172: {characterised by optical features}
- G02F 1/0018: {Electro-optical materials}
- G02F 1/0121: {Operation of devices; Circuit arrangements, not otherwise provided for in this subclass}
- G02F 1/0128: {based on electro-mechanical, magneto-mechanical, elasto-optic effects}
- G02F 1/0131: {based on photo-elastic effects, e.g. mechanically induced birefringence}
- G02F 1/172: {based on a suspension of orientable dipolar particles, e.g. suspended particles displays}
- G02F 2001/1678: {characterised by the composition or particle type}
- G09G 3/3433: {using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices (using liquid crystal devices G09G3/36; using electrochromic devices G09G3/38)}
- G09G 3/344: {based on particles moving in a fluid or in a gas, e.g. electrophoretic devices (electrophoretic devices per se G02F1/167)}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

The invention relates to a fluidic, in particular an electrofluidic display element, comprising at least one pixel chamber (1) which is in fluid communication with at least one reservoir volume (2), wherein an electrically conducting and/or polar liquid (3) can be reciprocated between the pixel chamber (1) and the reservoir volume (2), wherein the pixel chamber (1) has a height (H) and a pixel width (B) and the reservoir volume (2) has a reservoir width (D) and a length (L), characterized in that the width (D) of the reservoir volume (2) is insignificantly greater than or equal to the height (H) of the pixel chamber (1).

## Claims

### Claim 1

A fluidic display element, comprising at least one pixel chamber (1) which is in fluid communication with at least one reservoir volume (2), wherein an electrically conducting and/or polar liquid (3) can be reciprocated between the pixel chamber (1) and the reservoir volume (2), wherein the pixel chamber (1) has a height (H) and a pixel chamber width (B) and the reservoir volume (2) has a reservoir width (D) and a length (L), characterized in that the width (D) of the reservoir volume (2) is insignificantly greater than or equal to the height (H) of the pixel chamber (1), wherein the at least one reservoir volume (2) is channeled, and wherein the length (L) of the reservoir volume (2) is at least five times of the width (D) of the reservoir volume (2).

### Claim 2 (depends on 1)

The display element of claim 1, wherein the length (L) of the reservoir volume (2) is greater than or equal to the width (B) of the pixel chamber (1).

### Claim 3 (depends on 1)

The display element of claim 1, wherein the length (L) of the reservoir volume (2) is at least ten times of the width (D) of the reservoir volume (2).

### Claim 4 (depends on 1)

The display element of claim 1, comprising at least two juxtaposed pixel chambers (1), wherein at least one reservoir volume (2) which is in fluid communication with at least one of said pixel chambers (1) defines a separation channel between the juxtaposed pixel chambers (1), so that the juxtaposed pixel chambers (1) are spaced apart from another by at least the width (D) of the reservoir volume.

### Claim 5 (depends on 1)

The display element of claim 1, wherein at least one pixel chamber (1) is in fluid communication with at least two reservoir volumes (2) of different reservoir width (D) which are fluidically separated or in fluid communication.

### Claim 6 (depends on 5)

The display element of claim 5, wherein the reservoir volumes (2) define linear or non-linear channels of equal length (L).

### Claim 7 (depends on 1)

The display element of claim 1, wherein at least two reservoir volumes (2) intersect with each other in least one point of intersection and are in fluid communication in at least one point of intersection, wherein furthermore the reservoir volumes (2) are in fluid communication with a common pixel chamber (1).

### Claim 8 (depends on 1)

The display element of claims 1, wherein at least one pixel chamber (1) is in fluid communication with at least two reservoir volumes (2), wherein the reservoir volumes (2) are spaced apart and extend parallel to one another.

### Claim 9 (depends on 1)

The display element of claim 1, wherein at least one pixel chamber (1) is in fluid communication with at least two reservoir volumes (2), wherein the reservoir volumes (2) are arranged to one another in a meandering pattern or in a zigzag pattern.

### Claim 10 (depends on 1)

The display element of claim 1, wherein at least one pixel chamber (1) is in fluid communication with at least two cylindrical reservoir volumes (2), wherein the reservoir width (D) corresponds to a diameter of the reservoir volumes (2) and wherein at least two of the reservoir volumes (2) have a different or the same width (D).

### Claim 11 (depends on 1)

The display element of claim 1, wherein at least two fluidically separated pixel chambers (1) are in fluid communication with at least one common reservoir volume (2).

### Claim 12 (depends on 1)

The display element of claim 1, wherein the length (L) of the reservoir volume (2) is at least twenty times of the width (D) of the reservoir volume (2).

### Claim 13 (depends on 1)

The display element of claim 1, wherein the display element is an electrofluidic display element.

### Claim 14

A fluidic display element, comprising at least one pixel chamber (1) which is in fluid communication with at least a first and a second set of reservoir volumes (2), wherein an electrically conducting and/or polar liquid (3) can be reciprocated between each of the reservoir volumes (2) and the pixel chamber (1), wherein the pixel chamber (1) has a height (H) and the reservoir volumes (2) have a width (D1, D2), characterized in that the reservoir volumes (2) of the first set of reservoir volumes (2) have a first width (D1) and that at least the reservoir volumes of a second set of reservoir volumes have a second reservoir width (D2) different from the first reservoir width, wherein the reservoir widths (D1, D2) of the reservoir volumes (2) are insignificantly greater than or equal to the height (H) of the pixel chamber (1).

### Claim 15 (depends on 14)

The display element of claim 14, wherein the display element is an electrofluidic display element.