Field emission display and drive method for the same

Patent metadata

Field	Value
Publication number	US-9275570-B2
Application number	US-201113220969-A
Country	US
Kind code	B2
Filing date	Aug 30, 2011
Priority date	Dec 30, 2010
Publication date	Mar 1, 2016
Grant date	Mar 1, 2016

Abstract

A field emission display includes a panel and a control unit. The panel has a number of pixel units. Each of the pixel units has at least one fluorescent layer. The control unit which electrically connects to the pixel units receives an objective image. The control unit further selects a part of the pixel units corresponding to the objective image, divides the part of the pixel units into a number of pixel unit groups, and scans the pixel unit groups to make the plurality of pixel unit groups sequentially work such that the panel displays the objective image.

First claim

What is claimed is:

1. A drive method for a field emission display, the field emission display comprising a panel and a control unit, the panel having a plurality of pixel units, each of the plurality of pixel units having at least one fluorescent layer and an emitter, the control unit electrically connecting to the plurality of pixel units, the drive method comprising steps of:
receiving an objective image;
selecting a part of the plurality of pixel units corresponding to the objective image;
dividing the part of the plurality of pixel units into a plurality of pixel unit groups, wherein each of the plurality of pixel unit groups comprises at least one pixel unit; and
scanning the plurality of pixel unit groups to make the plurality of pixel unit groups sequentially work such that the panel displays the objective image, wherein the plurality of pixel unit groups satisfies an equation T<=t 1 +t 2 when operational, wherein T is a total working time period of the plurality of pixel unit groups, t 1 is an afterglow period of the at least one fluorescent layer, and t 2 is a time period of persistence of vision and in a range from about 0.1 seconds to about 0.4 seconds.

2. The drive method as claimed in claim 1 , wherein the step of scanning the plurality of pixel unit groups further comprises a step of enabling the emitter of the at least one pixel unit to emit electrons to bombard the at least one fluorescent layer of the same for luminance such that the panel displays the objective image.

3. The drive method as claimed in claim 1 , wherein the objective image has a frame, the plurality of pixel unit groups continuously and sequentially work so that the panel displays the frame, and an interval between two pixel unit groups is less than

(

t
⁢

⁢
1

+

t
⁢

⁢
2

)

(

N
-
1

)

,

wherein N is a number of the plurality of pixel unit groups.

4. The drive method as claimed in claim 1 , wherein the objective image has a plurality of frames, and the plurality of pixel unit groups sequentially work to satisfy an equation

T
<=

1
24

second such that the panel displays the plurality of frames at a rate of about 24 frames per second.

5. The drive method as claimed in claim 1 , wherein the step of dividing the part of the plurality of pixel units into the plurality of pixel unit groups further comprises a step of computing illumination of each of the part of the plurality of pixel units, wherein the part of the plurality of pixel units are divided into the plurality of pixel unit groups according to the illumination of each of the part of the plurality of pixel units such that the illumination of each of the plurality of pixel unit groups is the same.

6. The drive method as claimed in claim 1 , wherein each of the plurality of pixel unit groups comprises the plurality of pixel units disposed in an interlaced pattern.

7. The drive method as claimed in claim 1 , wherein each of the plurality of pixel unit groups comprises the plurality of pixel units disposed contiguously.

8. The drive method as claimed in claim 1 , wherein the plurality of pixel units are arranged in a matrix.

9. The drive method as claimed in claim 1 , wherein t 1 is in a range from about 1 millisecond to about 100 milliseconds.

10. A drive method for a field emission display, the field emission display comprising a panel and a control unit, the panel having a plurality of pixel units, each of the plurality of pixel units having at least one fluorescent layer and an emitter, the control unit electrically connecting to the plurality of pixel units, the drive method comprising steps of:
dividing a part of the plurality of pixel units into a plurality of pixel unit groups according to an objective image received from the control unit; and
scanning the plurality of pixel unit groups to make the plurality of pixel unit groups sequentially work such that the panel displays the objective image,
wherein the plurality of pixel unit groups satisfies an equation T<=t 1 +t 2 when operational, wherein T is a total working time period of the plurality of pixel unit groups, t 1 is an afterglow period of the at least one fluorescent layer, and t 2 is a time period of persistence of vision and in a range from about 0.1 seconds to about 0.4 seconds.

11. The drive method as claimed in claim 10 , wherein each of the plurality of pixel unit groups comprises at least one pixel unit, and the step of scanning the plurality of pixel unit groups further comprises a step of enabling the emitter of the at least one pixel unit to emit electrons to bombard the at least one fluorescent layer of the same for luminance such that the panel displays the objective image.

12. The drive method as claimed in claim 10 , wherein the objective image has a frame, the plurality of pixel unit groups continuously and sequentially work so that the panel displays the frame, and an interval between two pixel unit groups is less than

(

t
⁢

⁢
1

+

t
⁢

⁢
2

)

(

N
-
1

)

,

wherein N is a number of the plurality of pixel unit groups.

13. The drive method as claimed in claim 10 , wherein the objective image has a plurality of frames, and the plurality of pixel unit groups sequentially work to satisfy an equation

T
<=

1
24

second such that the panel displays the plurality of frames at a rate of about 24 frames per second.

14. The drive method as claimed in claim 10 , wherein the step of dividing the part of the plurality of pixel units into the plurality of pixel unit groups further comprises the step of computing illu

Assignees

• Cai Qi
• Guo Xue-Wei
• Lei You-Hua
• Fan Shou-Shan
• Univ Tsinghua
• Hon Hai Prec Ind Co Ltd

Inventors

• Cai Qi
• Guo Xue-Wei
• Lei You-Hua
• Fan Shou-Shan

Classifications

• G09G2310/0202

  Addressing of scan or signal lines · CPC title

• G09G2330/04

  Display protection · CPC title

• G09G3/22 Primary

  using controlled light sources · CPC title