Data drive circuit of display, and method for improving glay scale of image frame
A data-driven circuit and data-driven technology, applied to static indicators, instruments, electric light sources, etc., can solve problems such as gradients, low grayscales that cannot be presented as expected, and gradients.
Active Publication Date: 2006-12-06
AU OPTRONICS CORP
View PDF0 Cites 11 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
image 3 A setting is divided into three blocks from left to right to show low grayscale, high grayscale and low grayscale respectively, and the scanning direction is from left to right, such as where the icon follows the low grayscale after the high grayscale, Because of the charge stored in the parasitic capacitance, the low gray scale cannot be presented as expected, and there will be a gradual phenomenon; image 3 B and image 3 Similar to A, the scanning direction is from right to left, and also due to the influence of parasitic capacitance, there is a gradual phenomenon where high gray scales follow low gray scales; image 3 C setting is divided into three blocks from left to right to show high gray scale, low gray scale and high gray scale. The scanning direction is from left to right. Where high gray scale follows low gray scale, it will be affected by parasitic capacitance. The charge is stored, so that the low gray scale cannot be displayed as expected, and there is a gradual phenomenon; image 3 D and image 3 Similar to C, the scanning direction is from right to left, also due to the influence of parasitic capacitance, there is a gradual phenomenon where the high gray level follows the low gray level
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0049] Such as Figure 4A Shown is a structural diagram of a data driving circuit in a preferred embodiment of the present invention. This data drive circuit is used to drive the pixel array. This embodiment takes a single row of pixels as an illustration. The data drive circuit includes a voltage shift circuit 112, a DAC circuit 114, a horizontal shift circuit 116, a data drive unit 118 and a vertical shift circuit. circuit 120. The pixels 11 , 12 .
[0050] When a digital signal (the embodiment of the present invention will use a 6-bit digital signal as an explanation, but it is not meant to limit the scope of the present invention) is input to the voltage shift circuit 112 to adjust the voltage level, and the digital signal is converted by the DAC circuit 114. The signal is converted and amplified into an analog current signal I DAC , to overcome the parasitic resistance Rp and parasitic capacitance Cp in the line to store the charge at the output of the DAC circuit 114;...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a data driving circuit for a display device, used to drive a display module, comprising: a D / A current converting circuit, used to convert the received digital signal into analog current signal, where the analog current signal is larger than the current needed for driving display module; and multistage data driving unit, connected with the D / A current converting circuit and used to drive multiple data lines of the display module, where each stage data driving unit comprises: a sample / hold circuit and a sample / hold switch. And it can overcome the influence of parasitic capacitance at low gray level.
Description
technical field [0001] The invention relates to a data drive circuit for driving a display component with current, especially a circuit for improving the grayscale performance of a display by amplifying the current of a digital-to-analog conversion circuit. Background technique [0002] Organic Electroluminescence Display (OrganicEL Display) is also called Organic Light Emitting Diode (OLED) display. Therefore, it can replace the traditional liquid crystal display and become a display device commonly used in a new generation of portable information products, mobile phones, personal digital processors and portable computers. [0003] Organic light-emitting diodes are a current-driven component, and their luminous brightness is determined by the magnitude of the passing current. At present, the organic light-emitting diodes inside the organic light-emitting display are arranged in an array, and the display of different brightness can be achieved by controlling the magnitude of...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): G09G3/32G09G3/30H05B33/08G09G3/3233H05B44/00
Inventor 黄惠雅
Owner AU OPTRONICS CORP