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Digital to analog conversion circuit, display panel and display device

A digital-to-analog conversion circuit and voltage technology, which is applied in digital-to-analog converters, analog/digital conversion, code conversion, etc., can solve the problems of complex structure of digital-to-analog conversion circuits, increased occupied area, large wiring, etc.

Active Publication Date: 2017-01-11
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiments of the present invention provide a digital-to-analog conversion circuit, a display panel, and a display device, which are used to solve the problems in the prior art that the digital-to-analog conversion circuit has a complex structure, an increased occupied area, and a large number of wirings

Method used

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  • Digital to analog conversion circuit, display panel and display device
  • Digital to analog conversion circuit, display panel and display device
  • Digital to analog conversion circuit, display panel and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0142] The first digital signal terminal provides the first digital signal 000000 in a group of 6-bit binary sequences, the second digital signal terminal provides the first digital signal 00 in a group of 2-bit binary sequences, and the third digital signal terminal provides a The first digital signal 00 in the 2-bit binary sequence is taken as an example for illustration.

[0143] Under the control of the digital signal 000000, the first switch network provides the signal of the first divided voltage signal terminal to the first node, and the voltage of the signal of the first node is V f1 ; The second switch network provides the signal of the second voltage-dividing signal terminal to the second node, and then the voltage of the signal of the second node is V f2 ; The third switch network provides the signal of the 3rd divided voltage signal end to the third node, then the voltage of the signal of the third node is V f3 ; The fourth switch network provides the signal of th...

Embodiment 2

[0147] The first digital signal terminal provides the first digital signal 000000 in a group of 6-bit binary sequences, the second digital signal terminal provides the first digital signal 00 in a group of 2-bit binary sequences, and the third digital signal terminal provides a The second digital signal 01 in the 2-bit binary sequence is taken as an example for illustration.

[0148] Under the control of the digital signal 000000, the first switch network provides the signal of the first divided voltage signal terminal to the first node, and the voltage of the signal of the first node is V f1 ; The second switch network provides the signal of the second voltage-dividing signal terminal to the second node, and then the voltage of the signal of the second node is V f2 ; The third switch network provides the signal of the 3rd divided voltage signal end to the third node, then the voltage of the signal of the third node is V f3 ; The signal of the 4th voltage division signal end ...

Embodiment 3

[0152] The first digital signal terminal provides the first digital signal 000000 in a group of 6-bit binary sequences, the second digital signal terminal provides the first digital signal 00 in a group of 2-bit binary sequences, and the third digital signal terminal provides a The third digital signal 10 in the 2-bit binary sequence is taken as an example for illustration.

[0153] Under the control of the digital signal 000000, the first switch network provides the signal of the first divided voltage signal terminal to the first node, and the voltage of the signal of the first node is V f1 ; The second switch network provides the signal of the second voltage-dividing signal terminal to the second node, and then the voltage of the signal of the second node is V f2 ; The third switch network provides the signal of the 3rd divided voltage signal end to the third node, then the voltage of the signal of the third node is V f3 ; The fourth switch network provides the signal of th...

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Abstract

The invention discloses a digital to analog conversion circuit, a display panel and a display device. The digital to analog conversion circuit comprises a voltage division unit, a first segmentation unit, a second segmentation unit and a third segmentation unit, wherein a segmentation mode is adopted, by means of the mutual cooperation of the four units, only 257 voltage division signal ends are required to output 1024 analog signals with different voltages, compared with the manner of adopting 1024 voltage division signal ends in the prior art, the setting of the voltage division signal ends can be reduced, the structure is simplified, the wiring difficulty is reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a digital-to-analog conversion circuit, a display panel and a display device. Background technique [0002] At present, the digital-to-analog converters (Digital To Analog Converters, DACs) generally applicable to displays mainly include current-steering type and resistor string voltage-dividing type. Among them, although the current steering DAC has the characteristics of high speed and high precision, when it is used to drive the signal to the transmission line, in order to suppress the reflection of the transmission signal, the output impedance of the current steering DAC must be equal to the characteristic impedance of the transmission line, resulting in High power consumption. Although the resistor string voltage-dividing DAC has the advantages of simple structure, low noise, and good linearity, the accuracy of the resistor string voltage-dividing DAC is mainly determined ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/66G09G3/20
CPCG09G3/20H03M1/66G09G2310/027G09G2310/0291G09G2330/028H03M1/76G09G3/3208
Inventor 王糖祥
Owner BOE TECH GRP CO LTD
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