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Source driver, operation method thereof and display apparatus thereof

A source driver and data display technology, applied in instruments, static indicators, etc., can solve the problems that affect the output voltage of the operational amplifier, affect the display quality of the display panel, and the characteristics of the operational amplifier are not ideal, so as to reduce the display quality. effect of influence

Active Publication Date: 2015-06-17
AU OPTRONICS CORP
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Problems solved by technology

However, the characteristics of the operational amplifier composed of electronic components are not ideal, so that the voltage at the input terminal of the operational amplifier will be different to form an offset voltage, thereby affecting the voltage at the output terminal of the operational amplifier
According to the above, when the voltage at the output terminal of the operational amplifier is affected by the offset voltage, the optical effect presented by the pixel will be different from the expected optical effect, thus affecting the display quality of the display panel

Method used

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  • Source driver, operation method thereof and display apparatus thereof
  • Source driver, operation method thereof and display apparatus thereof
  • Source driver, operation method thereof and display apparatus thereof

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Embodiment Construction

[0069] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0070] figure 1 It is a system diagram of a display device according to an embodiment of the present invention. Please refer to figure 1 , in this embodiment, the display device 100 includes a timing controller 110, a gate driver 120, a source driver 130, and a display panel 140, wherein the display panel 140 is an organic light-emitting display panel as an example, but this embodiment of the present invention does not This is the limit. The gate driver 120 is coupled to the timing controller 110 and the display panel 140 so as to be controlled by the timing controller 110 to sequentially transmit a plurality of pixels to the display panel 140 to turn on and drive pixels (not shown) of the display panel 140 column by column. The source driver 130 is coupled to the timing controller 110 and ...

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Abstract

The present invention relates to a source driver, an operation method thereof and a display apparatus thereof. The source driver comprises an interface circuit, a digital analogue converter and a buffer unit. The interface circuit based on the timing signal outputs latched display data to a digital analogue converter to convert the display data to a data voltage. The buffer unit receives a reference voltage and a data voltage, and has an operational amplifier. The buffer unit according to a first latch signal and a second latch signal provides the data voltage and the reference voltage to a first input terminal or a second input terminal of the operational amplifier. The buffer unit according to the second latch signal alternately receives a reference voltage and the data voltage by the first input terminal and the second input terminal of the operational amplifier, and the second input terminal and the first input terminal are alternately coupled to the output end of the operational amplifier. The source driver can helps to reduce the influence from the operational amplifier offset voltage to the display quality of the display panel.

Description

technical field [0001] The present invention relates to a source driver, its operating method and display device, and in particular to a source driver with an operational amplifier, its operating method and its display device. Background technique [0002] With the advancement of manufacturing technology, flat-panel displays with superior characteristics such as high image quality, good space utilization efficiency, low power consumption, and no radiation, such as liquid crystal displays (LCDs) and organic light-emitting diode displays (OLEDs), have gradually replaced the old ones. The cathode ray tube has become the mainstream of the market. In the driving system of the display device, the source driver is used to convert the digital data into the pixel voltage, and the pixel voltage is provided to the enabled pixel, wherein the source driver uses the output buffer to increase the driving capability of the pixel voltage. [0003] Generally speaking, the output buffer of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20
Inventor 杨智富杜明鸿何宇玺
Owner AU OPTRONICS CORP
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