Display device and driving method for same

一种显示装置、驱动晶体管的技术，应用在静态指示器、仪器、半导体器件等方向，能够解决偏差显示品质、易产生偏差、降低等问题，达到防止亮度偏差、电压大小的变化小的效果

Active Publication Date: 2020-10-27
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for TFT, it is easy to deviate in this characteristic
Specifically, deviations in the threshold voltage are prone to
If there is a variation in the threshold voltage of the driving transistor provided in the display part, the display quality will decrease due to the variation in luminance.

Method used

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  • Display device and driving method for same
  • Display device and driving method for same
  • Display device and driving method for same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0069]

[0070] figure 2 It is a block diagram showing the overall configuration of the organic EL display device of the first embodiment. This organic EL display device includes a display section 100 , a display control circuit 200 , a gate driver 300 , an emission driver 400 , and a source driver 500 . In addition, for example, the gate driver 300 and the emission driver 400 are provided inside the organic EL panel, and the display control circuit 200 and the source driver 500 are provided on a substrate outside the organic EL panel, in addition to the display unit 100 .

[0071] In the display unit 100 , (i+1) scanning signal lines GL( 0 ) to GL(i) and j data signal lines DL( 1 ) to DL(j) orthogonal to these are provided. Also, in the display unit 100, i light emission control lines EML(1) are provided in one-to-one correspondence with the i scanning signal lines GL(1) to GL(i) other than the scanning signal line GL(0). )~EML(i). In the display unit 100 , the scanning...

no. 2 approach

[0117] The second embodiment will be described. In addition, since the overall configuration is the same as that of the first embodiment, description thereof will be omitted.

[0118]

[0119] while referring to Figure 9 , the configuration of the pixel circuit 10 of this embodiment will be described. This pixel circuit 10, such as Figure 9 As shown, it includes a light emitting element OLED, eight transistors (driving transistor Tdr, first power supply control transistor TA1, second power supply control transistor TA2, light emission control transistor TB, first write control transistor TC, threshold voltage compensation transistor TD, the second write control transistor TE, and the initialization transistor TF), a data holding capacitor C. Hereinafter, description will be given mainly on points different from the first embodiment, and description on points similar to the first embodiment will be appropriately omitted.

[0120] In the first embodiment, one power suppl...

no. 3 approach

[0137] The third embodiment will be described. In addition, since the overall configuration is the same as that of the first embodiment, description thereof will be omitted.

[0138]

[0139] while referring to Figure 15 , the configuration of the pixel circuit 10 of this embodiment will be described. This pixel circuit 10, such as Figure 15 As shown, it includes a light emitting element OLED, eight transistors (drive transistor Tdr, power supply control transistor TA, light emission control transistor TB, first write control transistor TC, first threshold voltage compensation transistor TD1, second threshold voltage compensation transistor TD2, the second write control transistor TE, and the initialization transistor TF), a data holding capacitor C.

[0140] In the first embodiment, a threshold voltage compensation transistor TD is provided to electrically connect between the gate terminal and the second conduction terminal of the driving transistor Tdr during the init...

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PUM

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Abstract

The purpose of the present invention is to realize a current driving type display device which can compensate for variations in the threshold voltage of a driving transistor without causing variationsin luminance. A pixel circuit (10) includes a light-emitting element (OLED), a driving transistor (Tdr), a power supply control transistor (TA), a light emission control transistor (TB), a first writing control transistor (TC), a threshold voltage compensation transistor (TD), a second writing control transistor (TE), an initialization transistor (TF), and a data holding capacitor (C). In a datawriting period, a scanning signal (G)(n)) becomes active, an initialization voltage (Vini) is provided to a first electrode of the data holding capacitor (C) via the driving transistor Tdr, and a datavoltage is provided to a second electrode of the data holding capacitor (C).

Description

technical field [0001] The following disclosure relates to a display device, and more specifically, to a display device including a display element driven by a current, such as an organic EL display device, and a driving method thereof. Background technique [0002] In recent years, organic EL display devices including pixel circuits including organic electroluminescence (Electro Luminescence) elements (hereinafter referred to as "organic EL elements") have been put into practical use. The organic EL element is a self-luminous display element that emits light at a brightness corresponding to the amount of current flowing therethrough. An organic EL display device using an organic EL element that is a self-luminous display element can easily achieve thinner thickness, lower power consumption, higher brightness, etc., compared with a liquid crystal display device that requires a backlight and a color filter. Therefore, in recent years, organic EL display devices have been act...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3233G09G3/20
CPCG09G3/3233G09G2300/0861G09G2300/0842G09G2300/0819G09G2320/045H10K59/131G09G3/3266G09G3/3291
Inventor 上野哲也
Owner SHARP KK
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