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Data driving method, data driver and amoled display

A data-driven, data-driven technology, applied in static indicators, instruments, etc., can solve the problems of insufficient line charging time, loss of gray-scale information, picture distortion, etc., to improve charging speed, reduce charging time, and improve charging efficiency. Effect

Active Publication Date: 2017-05-03
CHENGDU VISTAR OPTEOLECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that grayscale information is lost and pictures are distorted due to insufficient line charging time in the data-driven AMOLED display in the prior art, and then a data driving method for an AMOLED display is provided.

Method used

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  • Data driving method, data driver and amoled display
  • Data driving method, data driver and amoled display
  • Data driving method, data driver and amoled display

Examples

Experimental program
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Embodiment 1

[0028] This embodiment provides a data driving method. The driving voltage value is set according to the row charging time of different subframes. When the row charging time G of a certain subframe is i Less than the charging time threshold G th When , increase the driving voltage value V of the subframe di , so that V di >V data ; where i represents the subframe number, V data is the reference drive voltage.

[0029] The row charging time in each of the 8 subframes has been calculated in the background section of this application. For displays with different numbers of rows and columns, the corresponding charging time threshold may be different. For example, for an AMOLED display with 240 rows and 320 columns, the charging time threshold is about 0.9us. In the first six subframes, since there is enough charging time, the reference driving voltage can be directly adopted. The charging time is insufficient for the seventh subframe and the eighth subframe. At this time, ...

Embodiment 2

[0039] This embodiment provides a data driver, in a row charging time G i Greater than or equal to the charging time threshold G th , its output driving voltage value is V data , V data Is the reference driving voltage; the row charging time G in a certain subframe i Less than the charging time threshold G th , its output driving voltage value is V di and V di >V data , where i represents the subframe sequence number.

[0040] The above-mentioned data driver, when driving, increases the driving voltage value of the sub-frame with insufficient charging time to make it higher than the reference driving voltage value, so as to increase the pixel charging speed of the corresponding sub-frame. How much the specific driving voltage value is increased can be determined according to the row charging time G i with charge time threshold G th To determine the actual relationship, but also take into account the power of the display itself.

[0041] In this embodiment, a preferre...

Embodiment 3

[0045] This embodiment provides an AMOLED display with a structure such as Figure 5 As shown, including: a plurality of pixels, a scan driver and a data driver. A plurality of the pixels are arranged in a matrix form at intersection regions of the scan control signals Sn1, Sn2, and Sn3, and the data lines D1 to Dm.

[0046] Meanwhile, the display unit receives the first power ELVDD and the second power ELVSS provided from the outside. Wherein, the first power supply ELVDD is used as a high-level voltage source, and the second power supply ELVSS is used as a low-level voltage source. The first power source ELVDD and the second power source ELVSS are used as driving power sources of the pixels.

[0047] The scan driver generates scan control signals Si1 to Sin by being externally supplied (for example, from a timing control unit), and sequentially supplies the scan control signals Si1 to Sin to pixels.

[0048] The data drivers generate data and data signals corresponding to...

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Abstract

The invention provides a data drive method, a data driver and an AMOLED displayer. When a line charging time Gi of a certain sub-frame is greater than or equal to a charging time threshold value Gth, standard drive voltage Vdata is adopted for driving; when the line charging time Gi of a certain sub-frame is smaller than the charging time threshold value Gth, a drive voltage value Vdi of the sub-frame is increased so that the drive voltage value of the sub-frame can be greater than the standard drive voltage Vdata, wherein i represents a sub-frame number. By means of the technical scheme, the pixel charging speed of the sub-frame insufficient in charging time can be effectively improved, charging of the sub-frame can be completed and accurate gray scale data can be obtained within shorter time so as to ensure that accurate gray scale information can be obtained during picture composition, and color distortion is not caused.

Description

technical field [0001] The invention relates to the field of plane display, in particular to a method for driving an AMOLED display with data, a data driver applying the method and an AMOLED display. Background technique [0002] In flat panel display technology, AMOLED (Active Matrix Organic Light Emitting Diode-active matrix organic light-emitting display device) is characterized by its thinness, active light emission, fast response speed, wide viewing angle, rich colors and high brightness, low power consumption, and high and low temperature resistance. It has been applied to high-performance and large-size displays, and has gradually become a new generation of display technology in the display field. [0003] An AMOLED display generally includes M×N rows of pixels, which scan the pixels using the row scanning signal and the data voltage signal. When a certain pixel is scanned by the row scanning signal, the data voltage signal will charge the pixel. The pixel voltage is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3258G09G3/3291
Inventor 罗红磊宋善专朱晖张秀玉
Owner CHENGDU VISTAR OPTEOLECTRONICS CO LTD
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