Display driving integrated circuit, display device, and method used to perform operation of display driving integrated circuit

Patent metadata

Field	Value
Publication number	US-9437129-B2
Application number	US-201514601339-A
Country	US
Kind code	B2
Filing date	Jan 21, 2015
Priority date	Jan 29, 2014
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

Provided are display driving integrated circuits, display devices, and/or methods of operating the display driving integrated circuit. The display driving integrated circuit including a timing controller processing input data and outputting output data; and a source driving unit including at least one source driver and converting into analog data the output data received through a transmission channel connected to the timing controller and outputting the analog data as display data may be provided. The timing controller may include a data selecting unit comparing a transition count of the input data with a transition count of encoded data obtained by encoding the input data, and outputting one of the input data and the encoded data as selection data according to the comparison, a data randomizing unit randomizing the selection data and generating random data, and a data transmitting unit converting the random data into the output data may be provided.

First claim

What is claimed is:

1. A display driving integrated circuit comprising:
a timing controller configured to process input data and output data, the timing controller including,
a data selecting unit configured to compare a transition count of the input data with a transition count of encoded data obtained by encoding the input data, and output one of the input data and the encoded data as selection data according to a comparison result;
a data randomizing unit configured to randomize the selection data and generate random data; and
a data transmitting unit configured to convert the random data into the output data; and

a source driving unit including at least one source driver, the at least one source driver configured to convert the output data received through a transmission channel connected to the timing controller into analog data and output the analog data as display data.

2. The display driving integrated circuit of claim 1 , wherein the data selecting unit comprises:
a data input unit configured to receive the input data;
a first transition calculating unit configured to calculate the transition count of the input data as a first value;
a data encoding unit configured to generate the encoded data by encoding the input data;
a second transition calculating unit configured to calculate the transition count of the encoded data as a second value;
a comparison unit configured to compare the first value with the second value and output the comparison result; and
a data output unit configured to output one of the input data and the encoded data according to the comparison result.

3. The display driving integrated circuit of claim 2 , wherein the data encoding unit is configured to generate the encoded data by encoding first pixel data through Mth pixel data of the input data such that the encoded data includes the first pixel data and differences between adjacent pieces of pixel data from among the first pixel data through the Mth pixel data of the input data.

4. The display driving integrated circuit of claim 2 , wherein,
the input data includes first pixel data through Mth pixel data,
each of the first pixel data through the Mth pixel data of the input data includes first sub-pixel data through Nth sub-pixel data, and
the data encoding unit is configured to generate the encoded data by encoding the first sub-pixel data through M*Nth sub-pixel data of the input data, such that the encoded data includes the first sub-pixel data and differences between adjacent pieces of sub-pixel data from among the first sub-pixel data through M*Nth sub-pixel data of the input data.

5. The display driving integrated circuit of claim 2 , wherein
the first transition calculating unit is configured to calculates the first value
by counting a number of 1s in first pixel data of the input data,
by counting a number of 1s in values obtained by performing an XOR operation on adjacent pieces of pixel data from among the first pixel data through Mth pixel data of the input data, and
by summing the counted numbers of 1s, and

the second transition calculating unit is configured to, in response to a first control signal, calculate the second value
by counting a number of 1s in first pixel data of the encoded data,
by counting a number of 1s in values obtained by performing an XOR operation on adjacent pieces of pixel data from among the first pixel data through Mth pixel data of the encoded data, and
by summing the counted number of 1s.

6. The display driving integrated circuit of claim 1 , wherein the data randomizing unit comprises:
a scrambler configured to perform an XOR operation on the selection data and a random pattern, and generate the random data; and
a pattern generating unit configured to transmit the random pattern to the scrambler.

7. The display driving integrated circuit of claim 6 , wherein in response to a second control signal, the pattern generating unit is configured to generate the random pattern in a first cycle corresponding to a size of a horizontal line of a frame of a display panel, which is driven by the display driving integrated circuit.

8. The display driving integrated circuit of claim 6 , wherein
the source driving unit includes x source drivers, and
the random pattern has one logic value corresponding to every 1/x of a size of a horizontal line of a frame of a display panel, which is driven by the display driving integrated circuit.

9. The display driving integrated circuit of claim 6 , wherein
the data randomizing unit is configured to directly pass the selection data to the data transmitting unit in response to a third control signal, and
the data transmitting unit is configured to convert the directly passed selection data into the output data.

10. The display driving integrated circuit of claim 1 , wherein
the output data includes first mode information indicating the comparison result, and
wherein the source driving unit is configured to inversely convert the output data according to the first mode information.

11. The display driving integrated circuit of claim 10 , wherein the output data further comprises:
at least one of information about an encoding method performed on the encoded data, information about a cycle of a random pattern of the random data, and information about whether to generate the random data,
wherein the source driving unit is configured to inversely convert the output data according to the first mode information and the at least one information.

12. The display driving integrated circuit of claim 1 , wherein the data transmitting unit comprises:
a serial converter configured to serialize the random data into serial data; and
a data packetizing unit configured to packetize the serial data and generate the output data to the transmission channel.

13. The display driving integrated circuit of claim 12 , wherein
the source driving unit includes x source drivers, and
the data transmitting unit further comprises a clock embedding unit, the clock embedding unit configured to embed a clock signal into the serial data corresponding to every 1/x of a size of a horizontal line of a frame of a display panel, which is driven by the display driving integrated circuit.

14. The display driving integrated circuit of claim 1 , wherein
the source driving unit includes x source drivers and a plurality of transmission channels including the transmission channel, and
the timing controller and each of the x source drivers are connected in a point-to-point manner through the plurality of transmission channels.

15. The display driving integrated circuit of claim 1 , wherein the source driving unit comprises x source drivers, and
wherein the data selecting unit is configured to generate the encoded data by encoding, using different methods, with respect to at least one portion of the input data corresponding to at least one of the x source drivers and other portions of the input data.

16. A timing controller of a display driving integrated circuit comprising:
a data selecting unit configured to generate selection data from input data and encoded data based on a first transition count of the input data and a second transition count of the encoded data, the encoded data being obtained by encoding the input data, the first transition count being a count of transitions in the input data; the second transition count being a count of transitions in the encoded data; and
a data randomizing unit configured to randomize the selection data and generate random data.

17. The timing controller of claim 16 , where i

Assignees

• Lee Young-Hun
• Lee Sun-Ik
• Choi Young-Min
• Samsung Electronics Co Ltd

Inventors

• Lee Young-Hun
• Lee Sun-Ik
• Choi Young-Min

Classifications

• G09G3/2096

  Details of the interface to the display terminal specific for a flat panel (suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167) · CPC title

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G09G2330/021

  Power management, e.g. power saving · CPC title

• G09G2310/0286

  Details of a shift registers arranged for use in a driving circuit · CPC title

• G09G3/2085 Primary

  Special arrangements for addressing the individual elements of the matrix, other than by driving respective rows and columns in combination · CPC title