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Digital-to-analog converter, display panel driver having the same, and digital-to-analog converting method

A digital-to-analog converter, mode technology, applied in the direction of digital-to-analog converter, analog/digital conversion, code conversion, etc.

Inactive Publication Date: 2008-10-15
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, when the number of bits of digital data increases, in order to display a high-resolution image, the chip size of the DAC included in the display device may be large, for example, when the number of bits of digital data increases by m, the processing of digital data The die size of the DAC may increase by approximately 2 m

Method used

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  • Digital-to-analog converter, display panel driver having the same, and digital-to-analog converting method
  • Digital-to-analog converter, display panel driver having the same, and digital-to-analog converting method
  • Digital-to-analog converter, display panel driver having the same, and digital-to-analog converting method

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Embodiment Construction

[0039] Example embodiments will now be described more fully hereinafter with reference to the accompanying drawings. However, the invention may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0040] figure 1 A typical block diagram of the display device 100 is shown. refer to figure 1 , the display device 100 may include: a display panel 110 , a source driver 120 having a plurality of digital-to-analog converters (DACs), and a scan controller 130 . The DAC can be used as a resistor string converter using resistor strings, a capacitor converter using charging and charge distribution of capacitors, or a converter having a combination of configurations of resistor string converters and capacitor converters.

[0041] figure 2 icon figure...

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Abstract

Disclosed is a digital-to-analog converter, a display panel driver containing the same as well as a method for converting digital-to-analog. The digital-to-analog converter outputting an analog data voltage corresponding to n-bit data, includes a chopping amplification unit adapted to receive an upper bit voltage corresponding to upper x bits of the n-bit data and a lower bit voltage corresponding to lower y bits of the n-bit data and to output the analog data voltage. The chopping amplification unit may include a sample and hold capacitor adapted to be charged with the upper bit voltage in a non-inverting mode, and a chopping amplifier adapted to supply the upper bit voltage to the sample and hold capacitor in the non-inverting mode and adapted to output a voltage corresponding to the sum of the upper bit voltage and the lower bit voltage as the analog data voltage in an inverting mode.

Description

technical field [0001] Example embodiments relate to a digital-to-analog converter (DAC), a display panel driver having the same, and a method for digital-to-analog conversion. More particularly, example embodiments relate to a DAC having a reduced chip size, a display panel driver having the same, and a method for digital-to-analog conversion. Background technique [0002] Generally, a display device may require a digital-to-analog converter DAC in order to display an image corresponding to input digital data. The DAC may convert digital data into an analog data voltage, and may apply the analog data voltage to a display panel so that an image corresponding to the digital data may be displayed on the display panel. [0003] As the number of digital data bits increases, higher resolution images corresponding to the digital data can be produced. However, in order to display high-resolution images, a display device may require components (or devices) capable of handling digi...

Claims

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Application Information

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IPC IPC(8): H03M1/66G09G3/20
CPCH03M1/667H03M1/662H03M1/682H03M1/765G09G3/20G09G3/36H03F3/45H03M1/66
Inventor 高周铉辛允承
Owner SAMSUNG ELECTRONICS CO LTD
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