AMOLED column driving circuit and driving method thereof

A column drive and circuit technology, applied in the field of flat display, can solve the problems of reduced accuracy of linear DAC, complicated design of analog domain Gamma correction circuit, etc., and achieve the effect of reducing design difficulty, good image display effect, and reducing overall area.

Active Publication Date: 2015-12-09
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide an AMOLED column drive circuit and its drive method, which is used to solve the problem that the

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  • AMOLED column driving circuit and driving method thereof
  • AMOLED column driving circuit and driving method thereof
  • AMOLED column driving circuit and driving method thereof

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Embodiment Construction

[0043] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0044] see Figure 1 ~ Figure 4 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbi...

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Abstract

The invention provides an AMOLED column driving circuit and a driving method thereof. The AMOLED column driving circuit comprises a linear digital-analog conversion circuit; a Gamma correction output stage circuit used for carrying out Gamma correction on analog signals output by the linear digital-analog conversion circuit and driving an OLED pixel array to emit light; a clock control signal generation circuit used for providing clock signals and control signals; and a bias circuit used for providing a reference voltage. The AMOLED column driving method comprises the steps of: converting digital signals into the analog signals, carrying out Gamma correction on the analog signals, and then inputting the analog signals after the Gamma correction into the OLED pixel array so as to drive the OLED pixel array to emit light. According to the invention, the linear DAC does not generate precision losses in the AMOLED column driving circuit, complex matching work is not needed by a resistor string when a resistor string DAC is used, and the design difficulty is lowered; in addition, the DAC relatively small in size can be adopted, the integral area of the circuit is further reduced, and the AMOLED column driving circuit has the advantages of simple design, small area, high precision, good image displaying effect and the like.

Description

technical field [0001] The invention relates to the field of plane display technology, in particular to an AMOLED column drive circuit and a drive method thereof. Background technique [0002] In recent years, AMOLED (Active-matrix organic light-emitting diode, active-matrix organic light-emitting diode) is more and more used in mobile phones, tablet computers and other devices, because it has ultra-thin and wide viewing angle compared with other display technologies , low power consumption, fast response, vivid colors and so on. AMOLED driving methods mainly include current driving, voltage driving and digital driving, etc. Among them, voltage driving has a fast response speed, and this method is similar to the current mainstream AMLCD display driving technology, so it is widely used in AMOLED display driving. In the field of AMOLED display, there is a problem that the luminance of OLED pixels has a nonlinear relationship with the input voltage, so the output voltage of th...

Claims

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Application Information

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IPC IPC(8): G09G3/32
Inventor 汪辉黄尊恺丁毅岭汪宁章琦田犁方娜封松林
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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