US 11,443,667 B2Granted

Display apparatus and data driving integrated circuit thereof

AssigneeNovatek Microelectronics Corp.

InventorsChang-Pao Chang, Wei-Da Guo, Yueh-Hsun Tsai

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Abstract

The disclosure provides a display apparatus and a data driving integrated circuit thereof for removing the interference patterns caused by radio wave interference. In the disclosure, a data driving integrated circuit includes a gamma voltage generating circuit, power terminals for receiving power voltages of the gamma voltage generating circuit. The data driving integrated circuit couples dummy terminals to the power terminals, so as to decrease the equivalent impedance of the power terminals through a parallel connection between the I/O ESD protection circuits. Therefore, the DC offset of the power voltages caused by the radio wave interference may be decreased.

Claims13

Dependent claims

A data driving integrated circuit, comprising:

a gamma voltage generating circuit, configured to receive a first voltage and a second voltage, wherein the first voltage and the second voltage are in a gamma voltage range, or are as the largest and the smallest gamma voltages of the gamma voltage range;
a first power terminal, configured to receive the first voltage as a first gamma reference voltage;
a first ESD protection circuit associated with the first power terminal, wherein
the first ESD protection circuit is disposed in a path connecting between the first power terminal and the gamma voltage generating circuit;
a second power terminal, configured to receive the second voltage as a second gamma reference voltage;
a first dummy terminal, configured to receive a third gamma reference voltage other than the first voltage and the second voltage, wherein
a DC offset included in the first gamma reference voltage received by the first power terminal is reduced by turning on a first switch disposed between the first dummy terminal and the first power terminal to directly connect the first dummy terminal with the first power terminal;
and
second ESD protection circuit associated with the first dummy terminal;
wherein
the first ESD protection circuit and the second ESD protection circuit are coupled in parallel.

8 more elements

A display apparatus, comprising:

a display panel, comprising a plurality of pixels, wherein each pixel is driven according to a data voltage;
a data driving integrated circuit, disposed on a substrate which is a part of the display panel, for providing data voltages to drive the pixels, and
the data driving integrated circuit comprising:
a gamma voltage generating circuit, configured to receive a first voltage and a second voltage, wherein
the first voltage and the second voltage are in a gamma voltage range, or are as the largest and the smallest gamma voltages of the gamma voltage range;
a first power terminal, configured to receive the first voltage as a first gamma reference voltage;
a first ESD protection circuit associated with the first power terminal, wherein
the first ESD protection circuit is disposed in a path connecting between the first power terminal and the gamma voltage generating circuit;
a second power terminal, configured to receive the second voltage as a second gamma reference voltage;
a first dummy terminal, configured to receive a third gamma reference voltage other than the first voltage and the second voltage, wherein
a DC offset included in the first gamma reference voltage received by the first power terminal is reduced by turning on a first switch disposed between the first dummy terminal and the first power terminal to directly connect the first dummy terminal with the first power terminal;
and
a second ESD protection circuit associated with the first dummy terminal;
wherein the first ESD protection circuit and the second ESD protection circuit are coupled in parallel,
a power supplying circuit, disposed on a mainboard, and configured to generate the first voltage and the second voltage;
and
a connecting device connecting the mainboard and the data driving integrated circuit, wherein
the first voltage and the second voltage are transmitted to the data driving integrated circuit through the connecting device.

15 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/419,018Filed 22 May 2019 · us provisional application
Priority: 22 May 2018
Published: US 2019/0362665 A128 Nov 2019
Granted: 13 Sep 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification20 codes

G09G 3/20
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes: for presentation of an…
H10D 89/931
For devices having insulated gate electrodes, e.g. for IGFETs or IGBTs: characterised by the dispositions of the protective arrangements
H10W 42/60
Arrangements for protection of devices: protecting against electrostatic charges or discharges, e.g. Faraday shields
G09G 3/3696
Control of matrices with row and column drivers: generation of voltages supplied to electrode drivers

Family

Application62/674,632Us provisional application · filed 22 May 2018
US 2019/0362665 A1Pre-grant publication · published 28 Nov 2019
US 11,443,667 B2This patent

From the US filing history. Foreign family members aren’t listed.

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