Electronic device for enhancing voltage drive efficiency and related LCD
A technology for liquid crystal displays and electronic devices, which is applied to static indicators, instruments, etc., can solve the problems of increased charging time of equivalent capacitor units, decreased display performance, and difficulty in promoting grayscale reference voltages.
Inactive Publication Date: 2010-02-03
NOVATEK MICROELECTRONICS CORP
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[0007] It can be seen from the above that when more digital-to-analog converters receive the same gray-scale data value, the same connection line will be selected at the same time, making the load on the corresponding operational amplifier heavier, and it is not easy to push the gray-scale reference voltage, resulting in equivalent capacitance The charging time required for the unit is also greatly increased, resulting in a decrease in display performance
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[0047] Please refer to image 3 , image 3 It is a schematic diagram of a source driver 30 for a liquid crystal display according to an embodiment of the present invention. The source driver 30 includes a reference voltage generating device 22, a data latch 24, a digital-to-analog converter DAC (1) DAC (640), a connecting line L1', connecting lines L2-L64, an operational amplifier OP (1 )~OP(64), a data statistics unit 300, a data modulation unit 310 and a reference voltage modulation module 320. 30 source drivers can be used for similar figure 1 The data line signal output circuit 104 in the structure of the liquid crystal display 10, some components of which are the same as figure 2 The source drivers 20 are the same, so the same names and symbols are used. Therefore, the source driver 30 is used to select and output the grayscale reference voltages GV0 - GV63 to the equivalent capacitance units C1 - C640 on the LCD panel 26 through the digital-to-analog converters DAC(...
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The invention relates to an electronic device for enhancing voltage drive efficiency and a related LCD. The electronic device is used for a source electrode driver to enhance voltage drive efficiency,comprises a reference voltage generation device, a plurality of first connection lines, a second connection line with line width larger than the first connection lines, a data statistic unit and a reference voltage modulation module. The reference voltage generation device is used for generating a plurality of gray scale reference voltages; each first connection line and the second connection line are used for transmitting a gray scale reference voltage; the data statistic unit is used for statistics of a plurality of gray scale data values so as to generate a statistic result which instructsthe maximum gray scale data value and corresponds to the gray scale reference voltage; and the reference voltage modulation module is used for adjusting the plurality of first connection lines and the transmission corresponding relation between the second connection line and the plurality of gray scale reference voltages according to the statistic result.
Description
technical field [0001] The present invention relates to an electronic device for improving voltage driving efficiency of a source driver of a liquid crystal display and related liquid crystal display, especially relates to a kind of driving efficiency that can improve the gray scale reference voltage, thereby reducing the overall equivalent capacitance unit The required charging time of the electronic device and its associated liquid crystal display. Background technique [0002] Liquid crystal displays have the characteristics of light and thin appearance, low power consumption, and no radiation pollution, and have been widely used in information products such as computer systems, mobile phones, and personal digital assistants (PDAs). The working principle of the liquid crystal display is to use the liquid crystal molecules in different alignment states to have different polarization or refraction effects on light, so the penetration of light can be controlled through liqui...
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IPC IPC(8): G09G3/36
Inventor 黄立群
Owner NOVATEK MICROELECTRONICS CORP