CN1146849C - 显示装置 - Google Patents

显示装置 Download PDF

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CN1146849C
CN1146849C CNB988015862A CN98801586A CN1146849C CN 1146849 C CN1146849 C CN 1146849C CN B988015862 A CNB988015862 A CN B988015862A CN 98801586 A CN98801586 A CN 98801586A CN 1146849 C CN1146849 C CN 1146849C
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emitting component
light
display device
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CN1242858A (zh
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木村睦
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Seiko Epson Corp
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007Display of intermediate tones
    • G09G3/2074Display of intermediate tones using sub-pixels
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3258Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0404Matrix technologies
    • G09G2300/0417Special arrangements specific to the use of low carrier mobility technology
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/08Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809Several active elements per pixel in active matrix panels
    • G09G2300/0842Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0852Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor being a dynamic memory with more than one capacitor
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/027Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0233Improving the luminance or brightness uniformity across the screen
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275Details of drivers for data electrodes
    • G09G3/3291Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of El Displays (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

本发明的显示装置在各象素中形成发光强度各不相同的多个发光元件,通过控制各发光元件的发光或不发光来显示灰度等级。将数字信号传递到各象素中,由串联连接到各发光元件上的薄膜晶体管来控制。各发光元件的发光强度是公比为2的等比数列。使薄膜晶体管的导通电阻比发光元件的导通电阻小,使薄膜晶体管的关断电阻比发光元件的关断电阻大。由此,可降低因晶体管的电导的不均匀性引起的发光元件的发光强度的不均匀性,实现了图象质量的提高。

Description

显示装置
技术领域
本发明涉及显示元件,特别是涉及具备薄膜晶体管和因电流而发光的元件的显示装置(以下,记为电流发光显示装置)。
背景技术
作为实现大型、高精细、广视角、低功耗的在将来非常有希望的电流发光显示装置,可举出薄膜晶体管有机场致发光装置(以下,记为TFT-OELD)。
以下说明典型的现有的TFT-OELD的驱动方法。
在图5中示出现有的TFT-OELD的等效电路。在此,只图示了1个象素,但实际上存在多行、多列的多个象素。
从移位寄存器101输出脉冲,模拟信号供给线1022的模拟信号通过传送开关1032传递到源线1042上。相对于此时被选择的栅线109,模拟信号通过开关晶体管1052传递到保持电容1062上。由模拟信号来控制电流晶体管1072的电导,有机EL元件1082以对应于模拟信号的强度发光。
图6中示出现有的TFT-OELD的驱动方法。
利用第0列的移位寄存器的脉冲SR0将模拟信号A传递到第0列的源线的电位S0上。此外,利用第1列的移位寄存器的脉冲SR1将模拟信号A传递到第1列的源线的电位S1上。首先,在施加第0行的栅线的脉冲G0时,将第0列的源线的电位S0传递到第0行、第0列的的保持电容的电位C00上,将第1列的源线的电位S1传递到第0行、第1列的的保持电容的电位C01上。其次,在施加第1行的栅线的脉冲G1时,将第0列的源线的电位S0传递到第1行、第0列的的保持电容的电位C10上,将第1列的源线的电位S1传递到第1行、第1列的的保持电容的电位C11上。按照各保持电容1062(图5)的电位、即对应的模拟信号A,各有机EL元件1082(图5)以预定的强度发光。
此外,作为液晶显示装置的驱动方法的一种方式,已知有面积灰度等级方式。一般来说,在液晶显示装置中存在下述的问题。即,存在下述问题:由于在偏离显示面的法线方向的视角方向上透射率的变化及灰度等级反转变得显著,故视角变窄。上述面积灰度等级方式以解决该问题为目的,利用全部透过、全部不透过的面积比率来显示灰度等级。由此,实现了液晶显示装置的广视角化。
在上述的现有的TFT-OELD的驱动方法中,为了控制有机EL元件1082的发光强度,使用模拟信号来控制电流晶体管1072的电导。即,为了得到中间色调,必须使电流晶体管1072的电导与有机EL元件1082的电导相等,利用电流晶体管1072与有机EL元件1082的电压分割,来控制施加到有机EL元件1082上的电压。但是,此时存在下述问题:在屏内或屏间在电流晶体管1072的电导中产生不均匀性的情况下,该不均匀性作为有机EL元件1082的发光强度的不均匀性原封不动地被观察到。
因此,本发明的目的在于在电流发光显示装置、特别是TFT-OELD中降低因晶体管的电导的不均匀性引起的发光元件(特别是有机EL元件)的发光强度的不均匀性,实现图象质量的提高。
发明内容
本发明的显示装置具有以下的结构。
本发明的一种显示装置,包括:多条扫描线;多条信号线;和由上述扫描线和上述信号线形成为矩阵状的多个象素,各所述象素包括多个开关晶体管、多个电流晶体管和多个发光元件,每个所述开关晶体管控制所述多个电流晶体管中一个相应的晶体管的栅极与多条信号线中一条相应的信号线之间的导通,以及每个所述电流晶体管与所述多个发光元件中一个相应的发光元件串联配置。
按照本结构,可实现将发光强度各不相同的多个发光元件的每一个控制成完全导通状态或完全关断状态的某一种的灰度等级方式。由此,可降低因薄膜晶体管的电导的不均匀性引起的发光元件的发光强度的不均匀性。
在本发明中,发光元件的发光、不发光最好由数字信号来控制。由此,可在每个象素中将发光强度各不相同的多个发光元件的每一个控制成完全导通状态或完全关断状态的某一种。
在本发明中,发光元件的发光强度最好是公比为2的等比数列。由此,就在每个象素中具备DA变换器,可得到对应于数字信号的发光强度特性。
在本发明中,薄膜晶体管的导通电阻最好比发光元件的导通电阻小,薄膜晶体管的关断电阻最好比发光元件的关断电阻大。由此,通过切换薄膜晶体管的导通状态和关断状态,可切换发光元件的导通状态和关断状态。更为理想的是,薄膜晶体管的导通电阻小到与发光元件的导通电阻相比是可忽略的程度。此时,流过发光元件的电流只由发光元件的导通电阻来决定,薄膜晶体管的导通电阻多少有点增减都没有关系。因此,可抑制因晶体管的电导的不均匀性引起的发光强度的不均匀性。再有,薄膜晶体管的关断电阻最好比发光元件的关断电阻大很多。此时能使发光元件可靠地处于关断状态。
在本发明中,薄膜晶体管最好是用600℃以下的低温工艺来形成的多晶硅薄膜晶体管。由此,可实现廉价且大面积的发光元件,同时可得到能进行发光元件的驱动的高迁移率、高可靠性等的特点。
在本发明中,发光元件最好是由喷射工艺形成的有机场致发光元件。由此,可在屏上以图形刻蚀方式作成实现高发光效率、长寿命等优良特性的有机场致发光元件。
附图说明
图1是与本发明的实施例1有关的TFT-OELD的等效电路图。
图2是与本发明的实施例1有关的TFT-OELD的平面图和剖面图。
图3是示出与本发明的实施例1有关的TFT-OELD的驱动方法的图。
图4是与本发明的实施例2有关的TFT-OELD的等效电路图。
图5是现有的TFT-OELD的等效电路图。
图6是示出现有的TFT-OELD的驱动方法的图。
符号的说明
101    移位寄存器
10210  第0比特的数字信号供给线
10211  第1比特的数字信号供给线
10212  第2比特的数字信号供给线
10213  第3比特的数字信号供给线
1022   模拟信号供给线
10310  第0比特的传送开关
10311  第1比特的传送开关
10312  第2比特的传送开关
10313   第3比特的传送开关
1032    传送开关
10410   第0比特的源线
10411   第1比特的源线
10412   第2比特的源线
10413   第3比特的源线
1042    源线
10510   第0比特的开关晶体管
10511   第1比特的开关晶体管
10512   第2比特的开关晶体管
10513   第3比特的开关晶体管
1052    开关晶体管
10610   第0比特的保持电容
10611   第1比特的保持电容
10612   第2比特的保持电容
10613   第3比特的保持电容
1062    保持电容
10710   第0比特的电流晶体管
10711   第1比特的电流晶体管
10712   第2比特的电流晶体管
10713   第3比特的电流晶体管
1072    电流晶体管
10810   第0比特的有机EL元件
10811   第1比特的有机EL元件
10812   第2比特的有机EL元件
10813   第3比特的有机EL元件
1082    有机EL元件
109     栅线
1090    低位比特用栅线
1091    高位比特用栅线
110     共用电极
111     上侧电极
SR0   第0列的移位寄存器的脉冲
SR1   第1列的移位寄存器的脉冲
D0    第0比特的数字信号
D1    第1比特的数字信号
A     模拟信号
S00   第0列、第0比特的源线的电位
S01   第0列、第1比特的源线的电位
S10   第1列、第0比特的源线的电位
S11   第1列、第1比特的源线的电位
S0    第0列的源线的电位
S1    第1列的源线的电位
G0    第0行的栅线的脉冲
G1    第1行的栅线的脉冲
C000  第0行、第0列、第0比特的保持电容的电位
C001  第0行、第0列、第1特的保持电容的电位
C010  第0行、第1列、第0比特的保持电容的电位
C011  第0行、第1列、第1比特的保持电容的电位
C100  第1行、第0列、第0比特的保持电容的电位
C101  第1行、第0列、第1比特的保持电容的电位
C110  第1行、第1列、第0比特的保持电容的电位
C110  第1行、第1列、第1比特的保持电容的电位
C00   第0行、第0列的保持电容的电位
C01   第0行、第1列的保持电容的电位
C10   第1行、第0列的保持电容的电位
C11   第1行、第1列的保持电容的电位
具体实施方式
以下,根据附图说明本发明的优选实施形态。
(实施例1)
图1是与本发明的实施例1有关的TFT-OELD的等效电路图。在此,只图示了1个象素,但实际上存在多行、多列的多个象素。
从移位寄存器101输出脉冲,第0~3比特的数字信号供给线10210~10213的数字信号分别通过第0~3比特的传送开关10310~10313分别传递到第0~3比特的源线10410~10413上。即,将数字信号传递到各象素中。相对于此时被选择的栅线109,数字信号分别通过第0~3比特的开关晶体管10510~10513分别传递到第0~3比特的保持电容10610~10613上。薄膜晶体管、即电流晶体管10710~10713与电流元件、即有机EL元件10810~10813分别串联地连接。因此,由数字信号来控制第0~3比特的电流晶体管10710~10713的导通、关断,第0~3比特的有机EL元件10810~10813对应于数字信号发光或不发光。
图2中示出与本发明的实施例1有关的TFT-OELD的平面图和剖面图。
由于作为发光元件的第0~3比特的有机EL元件10810~10813的面积各不相同,故发光强度各不相同。可实现所谓的面积灰度等级方式。此外,该面积、即发光强度成为公比2的等比数列,结果在每个象素中也内置了DA变换器的功能。
在此,作为构成移位寄存器101、第0~3比特的传送开关10310~10313、第0~3比特的开关晶体管10510~10513和电流晶体管10710~10713等的薄膜晶体管,使用了用600℃以下的低温工艺形成的多晶硅薄膜晶体管。但是,如果是具有与其同等的功能的器件,即使是其它的元件也没有关系。此外,作为第0~3比特的有机EL元件10810~10813的构成要素的有机半导体膜是使液状的材料从喷射头喷出而形成的,即使用了所谓的喷射工艺。但是,或者用其它的工艺形成,或者是有机EL元件以外的电流发光元件,也没有关系。
图3中示出与本发明的实施例1有关的TFT-OELD的驱动方法的图。
利用第0列的移位寄存器的脉冲SR0将第0和第1比特的数字信号D0和D1传递到第0列、第0和第1比特的源线的电位S00和S01上。此外,利用第1列的移位寄存器的脉冲SR1将第0和第1比特的数字信号D0和D1传递到第1列、第0和第1比特的源线的电位S10和S11上。首先,在施加了第0行的栅线的脉冲G0时,将第0列、第0和第1比特的源线的电位S00和S01传递到第0行、第0列、第0和第1比特的保持电容的电位C000上和C001上,将第1列、第0和第1比特的源线的电位S10和S11传递到第0行、第1列、第0和第1比特的保持电容的电位C010和C011上。其次,在施加了第1行的栅线的脉冲时,将第0列、第0和第1比特的源线的电位S00和S01传递到第1行、第0列、第0和第1比特的保持电容的电位C100上和C101上,将第1列、第0和第1比特的源线的电位S10和S11传递到第1行、第1列、第0和第1比特的保持电容的电位C110和C111上。按照各保持电容的电位、即对应的数字信号,各有机EL元件成为预定的发光或不发光。
在此,导通状态的电流晶体管的电阻小到与导通状态的有机EL元件的电阻相比是可忽略的程度。因此,流过有机EL元件的电流只由有机EL元件相对于共用电极110与上侧电极111间的电压的电阻来决定,电流晶体管的电阻多少有点增减都没有关系。故可抑制因晶体管的电导的不均匀性引起的发光强度的不均匀性。此外,关断状态的电流晶体管的电阻比关断状态的有机EL元件的电阻大很多。因此,能使有机EL元件可靠地处于关断状态。
(实施例2)
图4是与本发明的实施例2有关的TFT-OELD的等效电路图。
本实施例的TFT-OELD的工作、功能、效果大致与实施例1相同。但是,在本实施例中,将栅线109分为低位比特用栅线1090和高位比特用栅线1091,各自担当第0和第1比特以及第2和第3比特的功能。由此,可使数字供给线的条数、每列的传送开关和源线的条数从4减少到2。但是,要将栅线的扫描信号、移位寄存器的脉冲和数字信号的频率增大一倍。
(应用例)
由于本发明的目的在于在电流发光显示元件中降低因晶体管的电导的不均匀性引起的发光元件的发光强度的不均匀性,故与「背景技术」项目中叙述的液晶显示元件的面积灰度等级方式在本质上是不同的。实际上,在电流发光显示元件中,只要发光强度不同,就没有必要使面积不同。但是,在该结构中,能见到类似的方面。因此,相对于液晶显示元件的面积灰度等级方式而发表的许多实施例可适用于本发明的灰度等级方式,能预期得到与该发表的文章中记述的相同的效果。
产业上的利用可能性
因为本发明具有上述的效果,故可适用于具备利用晶体管和电流而发光的元件的显示装置。作为发光元件,例如可举出有机场致发光元件。此外,应用了本发明的显示装置不仅可用于个人使用的个人计算机、携带型电子笔记本,也可用于室外的大型揭示板、广告板等信息显示装置。

Claims (9)

1.一种显示装置,包括:
多条扫描线;
多条信号线;和
由上述扫描线和上述信号线形成为矩阵状的多个象素,
各所述象素包括多个开关晶体管、多个电流晶体管和多个发光元件,
每个所述开关晶体管控制所述多个电流晶体管中一个相应的晶体管的栅极与多条信号线中一条相应的信号线之间的导通,以及
每个所述电流晶体管与所述多个发光元件中一个相应的发光元件串联配置。
2.如权利要求1所述的显示装置,其特征在于:
各发光元件的发光强度都是不同的.
3.如权利要求1或2所述的显示装置,其特征在于:
每一发光元件被设定为导通状态或关断状态。
4.如权利要求3所述的显示装置,其特征在于:
对电流晶体管的控制是由经至少一条信号线和经至少一个开关晶体管提供的数字信号来进行的。
5.如以上任一权利要求所述的显示装置,其特征在于:
上述发光元件的发光强度是公比为2的等比数列。
6.如以上任一权利要求所述的显示装置,其特征在于:
上述电流晶体管的导通电阻比上述发光元件的导通电阻小,上述电流晶体管的关断电阻比上述发光元件的关断电阻大。
7.如以上任一权利要求所述的显示装置,其特征在于:
上述开关晶体管和电流晶体管都属于600℃或以下的低温工艺形成的多晶硅薄膜晶体管。
8.如以上任一权利要求所述的显示装置,其特征在于:
上述发光元件包括有机场致发光元件。
9.如以上任一权利要求所述的显示装置,其特征在于:
上述发光元件彼此有不同面积。
CNB988015862A 1997-08-28 1998-08-25 显示装置 Expired - Lifetime CN1146849C (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111092095A (zh) * 2018-10-23 2020-05-01 群创光电股份有限公司 显示装置

Families Citing this family (84)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1173158A (ja) * 1997-08-28 1999-03-16 Seiko Epson Corp 表示素子
GB9803441D0 (en) * 1998-02-18 1998-04-15 Cambridge Display Tech Ltd Electroluminescent devices
JP4092827B2 (ja) 1999-01-29 2008-05-28 セイコーエプソン株式会社 表示装置
JP2000284752A (ja) 1999-01-29 2000-10-13 Seiko Epson Corp 表示装置
US6366025B1 (en) * 1999-02-26 2002-04-02 Sanyo Electric Co., Ltd. Electroluminescence display apparatus
US6512504B1 (en) * 1999-04-27 2003-01-28 Semiconductor Energy Laborayory Co., Ltd. Electronic device and electronic apparatus
JP4627822B2 (ja) 1999-06-23 2011-02-09 株式会社半導体エネルギー研究所 表示装置
JP2001100696A (ja) * 1999-09-29 2001-04-13 Sanyo Electric Co Ltd アクティブマトリックス型el表示装置
US6559594B2 (en) * 2000-02-03 2003-05-06 Semiconductor Energy Laboratory Co., Ltd. Light-emitting device
TW556144B (en) * 2000-03-30 2003-10-01 Seiko Epson Corp Display device
EP1207511A4 (en) * 2000-03-30 2006-08-16 Seiko Epson Corp DISPLAY
US20010030511A1 (en) * 2000-04-18 2001-10-18 Shunpei Yamazaki Display device
TW536836B (en) * 2000-05-22 2003-06-11 Semiconductor Energy Lab Light emitting device and electrical appliance
TW512304B (en) * 2000-06-13 2002-12-01 Semiconductor Energy Lab Display device
TW522374B (en) * 2000-08-08 2003-03-01 Semiconductor Energy Lab Electro-optical device and driving method of the same
US6992652B2 (en) * 2000-08-08 2006-01-31 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and driving method thereof
US7180496B2 (en) 2000-08-18 2007-02-20 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and method of driving the same
US6987496B2 (en) * 2000-08-18 2006-01-17 Semiconductor Energy Laboratory Co., Ltd. Electronic device and method of driving the same
TW518552B (en) 2000-08-18 2003-01-21 Semiconductor Energy Lab Liquid crystal display device, method of driving the same, and method of driving a portable information device having the liquid crystal display device
TW514854B (en) * 2000-08-23 2002-12-21 Semiconductor Energy Lab Portable information apparatus and method of driving the same
US7315295B2 (en) 2000-09-29 2008-01-01 Seiko Epson Corporation Driving method for electro-optical device, electro-optical device, and electronic apparatus
US7184014B2 (en) * 2000-10-05 2007-02-27 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device
US7071911B2 (en) 2000-12-21 2006-07-04 Semiconductor Energy Laboratory Co., Ltd. Light emitting device, driving method thereof and electric equipment using the light emitting device
JP4822590B2 (ja) * 2001-02-08 2011-11-24 三洋電機株式会社 有機el回路
US6747623B2 (en) * 2001-02-09 2004-06-08 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device and method of driving the same
JP3608614B2 (ja) 2001-03-28 2005-01-12 株式会社日立製作所 表示装置
KR100394006B1 (ko) 2001-05-04 2003-08-06 엘지전자 주식회사 전류구동 표시소자의 더블 스캔 구조 및 제조방법
US6956547B2 (en) * 2001-06-30 2005-10-18 Lg.Philips Lcd Co., Ltd. Driving circuit and method of driving an organic electroluminescence device
JP4785300B2 (ja) * 2001-09-07 2011-10-05 株式会社半導体エネルギー研究所 電気泳動型表示装置、表示装置、及び電子機器
EP3611716B1 (en) * 2001-09-07 2021-07-14 Joled Inc. El display panel, method of driving the same, and el display device
JP2003150108A (ja) * 2001-11-13 2003-05-23 Matsushita Electric Ind Co Ltd アクティブマトリックス基板及びそれを用いた電流制御型発光素子の駆動方法
TWI273539B (en) * 2001-11-29 2007-02-11 Semiconductor Energy Lab Display device and display system using the same
JP4050503B2 (ja) 2001-11-29 2008-02-20 株式会社日立製作所 表示装置
JP3913534B2 (ja) * 2001-11-30 2007-05-09 株式会社半導体エネルギー研究所 表示装置及びこれを用いた表示システム
GB0130411D0 (en) * 2001-12-20 2002-02-06 Koninkl Philips Electronics Nv Active matrix electroluminescent display device
GB0130600D0 (en) * 2001-12-21 2002-02-06 Koninkl Philips Electronics Nv Active matrix electroluminescent display device
JP2004004788A (ja) * 2002-04-24 2004-01-08 Seiko Epson Corp 電子素子の制御回路、電子回路、電気光学装置、電気光学装置の駆動方法、及び電子機器、並びに電子素子の制御方法
JP2003345306A (ja) * 2002-05-23 2003-12-03 Sanyo Electric Co Ltd 表示装置
JP4067878B2 (ja) * 2002-06-06 2008-03-26 株式会社半導体エネルギー研究所 発光装置及びそれを用いた電気器具
JP4059712B2 (ja) * 2002-06-11 2008-03-12 沖電気工業株式会社 表示素子用電流出力回路部の制御回路
JP4409152B2 (ja) 2002-06-27 2010-02-03 株式会社ルネサステクノロジ 表示制御駆動装置および表示システム
US6982727B2 (en) * 2002-07-23 2006-01-03 Broadcom Corporation System and method for providing graphics using graphical engine
JP2004119342A (ja) * 2002-09-30 2004-04-15 Pioneer Electronic Corp 有機el積層型有機スイッチング素子及び有機elディスプレイ
US7271784B2 (en) * 2002-12-18 2007-09-18 Semiconductor Energy Laboratory Co., Ltd. Display device and driving method thereof
JP4430010B2 (ja) 2003-01-24 2010-03-10 株式会社半導体エネルギー研究所 発光装置
US20040257352A1 (en) * 2003-06-18 2004-12-23 Nuelight Corporation Method and apparatus for controlling
JP2005031629A (ja) 2003-06-19 2005-02-03 Sharp Corp 表示素子および表示装置
JP4583732B2 (ja) * 2003-06-30 2010-11-17 株式会社半導体エネルギー研究所 表示装置、及びその駆動方法
JP4552421B2 (ja) * 2003-11-13 2010-09-29 セイコーエプソン株式会社 電気光学装置、電子機器及び電気光学装置の駆動方法
US20050200292A1 (en) * 2004-02-24 2005-09-15 Naugler W. E.Jr. Emissive display device having sensing for luminance stabilization and user light or touch screen input
US20060007248A1 (en) * 2004-06-29 2006-01-12 Damoder Reddy Feedback control system and method for operating a high-performance stabilized active-matrix emissive display
US20050200296A1 (en) * 2004-02-24 2005-09-15 Naugler W. E.Jr. Method and device for flat panel emissive display using shielded or partially shielded sensors to detect user screen inputs
US20050200294A1 (en) * 2004-02-24 2005-09-15 Naugler W. E.Jr. Sidelight illuminated flat panel display and touch panel input device
FR2866973B1 (fr) * 2004-02-27 2006-08-04 Commissariat Energie Atomique Dispositif ameliore d'adressage de pixels
CN1957471A (zh) * 2004-04-06 2007-05-02 彩光公司 在平板显示器中与传感器阵列集成的彩色滤波器
US7129938B2 (en) * 2004-04-12 2006-10-31 Nuelight Corporation Low power circuits for active matrix emissive displays and methods of operating the same
US7928937B2 (en) * 2004-04-28 2011-04-19 Semiconductor Energy Laboratory Co., Ltd. Light emitting device
US20050248515A1 (en) * 2004-04-28 2005-11-10 Naugler W E Jr Stabilized active matrix emissive display
JP2006106673A (ja) * 2004-05-25 2006-04-20 Victor Co Of Japan Ltd 表示装置
JP5087821B2 (ja) * 2004-05-25 2012-12-05 株式会社Jvcケンウッド 表示装置
JP2006106672A (ja) * 2004-05-25 2006-04-20 Victor Co Of Japan Ltd 表示装置
US8194006B2 (en) 2004-08-23 2012-06-05 Semiconductor Energy Laboratory Co., Ltd. Display device, driving method of the same, and electronic device comprising monitoring elements
KR100699997B1 (ko) 2004-09-21 2007-03-26 삼성에스디아이 주식회사 다수개의 구동 트랜지스터와 다수개의 애노드 또는캐소드전극을 갖는 유기 전계 발광 표시장치
JP4400401B2 (ja) * 2004-09-30 2010-01-20 セイコーエプソン株式会社 電気光学装置とその駆動方法及び電子機器
KR101333509B1 (ko) 2004-12-06 2013-11-28 가부시키가이샤 한도오따이 에네루기 켄큐쇼 반도체 장치, 표시 모듈, 및 휴대 전화
JP5201791B2 (ja) * 2004-12-06 2013-06-05 株式会社半導体エネルギー研究所 表示装置及び電子機器
US7595778B2 (en) 2005-04-15 2009-09-29 Semiconductor Energy Laboratory Co., Ltd. Display device and electronic device using the same
US9318053B2 (en) 2005-07-04 2016-04-19 Semiconductor Energy Laboratory Co., Ltd. Semiconductor device and driving method thereof
US20070001954A1 (en) * 2005-07-04 2007-01-04 Semiconductor Energy Laboratory Co., Ltd. Display device and driving method of display device
JP4650726B2 (ja) * 2005-08-23 2011-03-16 日本ビクター株式会社 表示装置
EP1758072A3 (en) 2005-08-24 2007-05-02 Semiconductor Energy Laboratory Co., Ltd. Display device and driving method thereof
JP2007086762A (ja) * 2005-08-24 2007-04-05 Semiconductor Energy Lab Co Ltd 表示装置及びその駆動方法
JP4904756B2 (ja) * 2005-09-27 2012-03-28 株式会社デンソー 有機el駆動回路、有機el表示器およびその駆動方法
US7635863B2 (en) 2005-10-18 2009-12-22 Semiconductor Energy Laboratory Co., Ltd. Display device and electronic apparatus having the display device
JP5041777B2 (ja) 2005-10-21 2012-10-03 株式会社半導体エネルギー研究所 表示装置及び電子機器
EP1826741A3 (en) 2006-02-23 2012-02-15 Semiconductor Energy Laboratory Co., Ltd. Display device and electronic device having the same
JP4577244B2 (ja) 2006-03-15 2010-11-10 セイコーエプソン株式会社 発光装置及びその駆動方法並びに電子機器
GB2437113B (en) 2006-04-12 2008-11-26 Cambridge Display Tech Ltd Light-emissive display and method of manufacturing the same
TWI476745B (zh) 2006-05-31 2015-03-11 Semiconductor Energy Lab 顯示裝置、顯示裝置的驅動方法、以及電子設備
JP2008225101A (ja) * 2007-03-13 2008-09-25 Fujifilm Corp 表示装置
JP4329868B2 (ja) * 2008-04-14 2009-09-09 カシオ計算機株式会社 表示装置
JP5657198B2 (ja) * 2008-08-07 2015-01-21 グローバル・オーエルイーディー・テクノロジー・リミテッド・ライアビリティ・カンパニーGlobal Oled Technology Llc. 表示装置
JP2010122493A (ja) * 2008-11-20 2010-06-03 Eastman Kodak Co 表示装置
KR20160087022A (ko) * 2015-01-12 2016-07-21 삼성디스플레이 주식회사 표시패널

Family Cites Families (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3807037A (en) * 1972-11-30 1974-04-30 Us Army Pocketable direct current electroluminescent display device addressed by mos and mnos circuitry
JPS5688193A (en) * 1979-12-19 1981-07-17 Citizen Watch Co Ltd Display unit
JPS58220185A (ja) * 1982-06-17 1983-12-21 セイコーインスツルメンツ株式会社 表示素子
JPS6122326A (ja) * 1984-03-23 1986-01-30 Citizen Watch Co Ltd 階調表示装置
JPS61267782A (ja) * 1985-05-23 1986-11-27 三菱電機株式会社 表示素子
DE3751502T2 (de) * 1986-03-11 1996-02-15 Kanegafuchi Chemical Ind Elektrische oder elektronische Anordnung mit einer dünnen Schicht aus Polyimid.
US5543819A (en) * 1988-07-21 1996-08-06 Proxima Corporation High resolution display system and method of using same
US5027040A (en) * 1988-09-14 1991-06-25 Daichi Company, Ltd. EL operating power supply circuit
US5126214A (en) * 1989-03-15 1992-06-30 Idemitsu Kosan Co., Ltd. Electroluminescent element
US5138303A (en) * 1989-10-31 1992-08-11 Microsoft Corporation Method and apparatus for displaying color on a computer output device using dithering techniques
ATE180578T1 (de) * 1992-03-13 1999-06-15 Kopin Corp Am kopf getragene anzeigevorrichtung
US5302966A (en) * 1992-06-02 1994-04-12 David Sarnoff Research Center, Inc. Active matrix electroluminescent display and method of operation
GB9223697D0 (en) * 1992-11-12 1992-12-23 Philips Electronics Uk Ltd Active matrix display devices
JPH06325869A (ja) * 1993-05-18 1994-11-25 Mitsubishi Kasei Corp 有機電界発光パネル
US5460983A (en) * 1993-07-30 1995-10-24 Sgs-Thomson Microelectronics, Inc. Method for forming isolated intra-polycrystalline silicon structures
JP2821347B2 (ja) 1993-10-12 1998-11-05 日本電気株式会社 電流制御型発光素子アレイ
JP3463362B2 (ja) * 1993-12-28 2003-11-05 カシオ計算機株式会社 電界発光素子の製造方法および電界発光素子
JP2689916B2 (ja) 1994-08-09 1997-12-10 日本電気株式会社 アクティブマトリクス型電流制御型発光素子の駆動回路
US5714968A (en) * 1994-08-09 1998-02-03 Nec Corporation Current-dependent light-emitting element drive circuit for use in active matrix display device
US5652600A (en) * 1994-11-17 1997-07-29 Planar Systems, Inc. Time multiplexed gray scale approach
US5684365A (en) * 1994-12-14 1997-11-04 Eastman Kodak Company TFT-el display panel using organic electroluminescent media
JP2726631B2 (ja) * 1994-12-14 1998-03-11 インターナショナル・ビジネス・マシーンズ・コーポレイション 液晶表示方法
JPH08241057A (ja) * 1995-03-03 1996-09-17 Tdk Corp 画像表示装置
JP3412076B2 (ja) * 1995-03-08 2003-06-03 株式会社リコー 有機el素子
US5754064A (en) * 1995-08-11 1998-05-19 Chien; Tseng Lu Driver/control circuit for a electro-luminescent element
US5748160A (en) * 1995-08-21 1998-05-05 Mororola, Inc. Active driven LED matrices
JPH09153624A (ja) 1995-11-30 1997-06-10 Sony Corp 半導体装置
JPH09153524A (ja) * 1995-11-30 1997-06-10 Taiyo Yuden Co Ltd 電子回路装置の製造方法
JPH10172762A (ja) * 1996-12-11 1998-06-26 Sanyo Electric Co Ltd エレクトロルミネッセンス素子を用いた表示装置の製造方法及び表示装置
JPH1173158A (ja) * 1997-08-28 1999-03-16 Seiko Epson Corp 表示素子
JP3543170B2 (ja) * 1998-02-24 2004-07-14 カシオ計算機株式会社 電界発光素子及びその製造方法
US7173612B2 (en) * 2000-12-08 2007-02-06 Matsushita Electric Industrial Co., Ltd. EL display device providing means for delivery of blanking signals to pixel elements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111092095A (zh) * 2018-10-23 2020-05-01 群创光电股份有限公司 显示装置

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US20030071772A1 (en) 2003-04-17
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US7236164B2 (en) 2007-06-26
EP0949603A1 (en) 1999-10-13
EP0949603A4 (en) 2000-12-06
EP0949603B1 (en) 2006-01-18
DE69833257D1 (de) 2006-04-06
US6518941B1 (en) 2003-02-11
TW385420B (en) 2000-03-21
KR20000068801A (ko) 2000-11-25
WO1999012150A1 (fr) 1999-03-11
KR100594828B1 (ko) 2006-07-03
DE69833257T2 (de) 2006-09-21

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