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Display device, method of driving the same, and electronic unit

A display device and drive circuit technology, applied to static indicators, instruments, etc., can solve problems such as changes in luminous brightness levels and deterioration of screen uniformity, and achieve the effects of gentle tilt, cost reduction, and high picture quality

Inactive Publication Date: 2011-05-18
JOLED INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, even when the same voltage is applied to the gate of the driving transistor, the emission luminance level of the organic EL element varies, and the uniformity of the screen deteriorates

Method used

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  • Display device, method of driving the same, and electronic unit
  • Display device, method of driving the same, and electronic unit
  • Display device, method of driving the same, and electronic unit

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0080] 1. Display driver operation

[0081] In display device 1, such as figure 1 and 2 As shown, the driving circuit 20 performs display driving on the pixels 11 in the display panel 10 (pixel array 13 ) based on the video signal 20A and the synchronization signal 20B. By display driving, a driving current is injected into the organic EL element 12 in each pixel 11, holes and electrons are recombined, and light emission occurs. The generated light is taken outside, and an image is displayed on the display panel 10 .

[0082] refer to image 3 Parts (A) to (E) of , the detailed display driving operation in this embodiment will be described. image 3 Sections (A) to (E) in are examples of various timing waveforms. image 3 Parts (A) to (C) in , respectively illustrate signal pulses applied to the signal line DTL, the scanning line WSL, and the power supply line DSL. image 3 Parts (D) and (E) in (E) respectively illustrate the waveforms of the gate potential Vg and the so...

no. 2 example

[0133] 1. Display driver operation

[0134] Also in the second embodiment, in a manner similar to the first embodiment, as figure 1 and 2As shown, in the display device 1 , the driving circuit 20 performs display driving on the pixels 11 in the display panel 10 based on the video signal 20A and the synchronization signal 20B. A drive current is injected into the organic EL element 12 in each pixel 11, holes and electrons recombine, and light emission occurs. The generated light is taken outside, and an image is displayed. In the following, the display driving operation in this embodiment will be described in detail.

[0135] Figure 9 Parts (A) to (E) in are various timing waveforms of the embodiment. Figure 9 Parts (A), (B) and (C) in , illustrate signal pulses applied to the signal line DTL, the scan line WSL, and the power supply line DSL, respectively. Figure 9 Parts (D) and (E) in (E) respectively illustrate the waveforms of the gate potential Vg and the source po...

no. 3 example

[0165] 1. Display driver operation

[0166] Also in the third embodiment, in a manner similar to the first embodiment, as figure 1 and 2 As shown, in the display device 1 , the driving circuit 20 performs display driving on the pixels 11 in the display panel 10 based on the video signal 20A and the synchronization signal 20B. A drive current is injected into the organic EL element 12 in each pixel 11, resulting in light emission. The generated light is taken outside, and an image is displayed. In the following, the display driving operation in this embodiment will be described in detail.

[0167] Figure 12 Parts (A) to (E) in are various timing waveforms of the embodiment. Figure 12 Parts (A), (B) and (C) in , illustrate signal pulses applied to the signal line DTL, the scan line WSL, and the power supply line DSL, respectively. Figure 12 Parts (D) and (E) in (E) respectively illustrate the waveforms of the gate potential Vg and the source potential Vs in the drive tr...

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Abstract

A display device includes: pixels each including a light emitting element; scan lines, signal lines, and power supply lines; a scan line drive circuit applying a selection pulse to the scan lines in succession; a signal line drive circuit applying a signal pulse to the signal lines through switching a gray-scale interpolation voltage, a basic voltage and a video signal voltage, in this order to perform gray-scale interpolation; and a power supply line drive circuit applying a control pulse to the power supply lines. The scan line drive circuit generates the selection pulse through alternately switching an on-voltage and an off-voltage, and applies the pulse to the scan lines so that application of the on-voltage to the scan line starts in a time period of the gray-scale interpolation voltage and the on-voltage is switched to the off-voltage in a time period of the basic voltage.

Description

technical field [0001] The present invention relates to a display device using a self-luminous element such as an organic EL (Electroluminescence) element, a method of driving the display device, and an electronic unit having such a display device. Background technique [0002] In recent years, in the field of display devices for displaying images, display devices (organic EL display devices) using current-driven optical elements (for example, organic EL elements) as light-emitting elements have been developed and are being commercialized. The luminous brightness level of the optical element changes according to the value of the flowing current. [0003] An organic EL element is a self-luminous element different from a liquid crystal element or the like. As a result, in the organic EL display device, no light source (backlight) is required. Compared with liquid crystal display devices that require a light source, the image is more visible, the power consumption is lower, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G2320/045G09G3/3233G09G2300/0819
Inventor 丰村直史内野胜秀
Owner JOLED INC
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