DISPLAY APPARATUS

• US 20160104450A1
• Filed: 04/22/2015
• Published: 04/14/2016
• Est. Priority Date: 10/14/2014
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Group)
• Original Assignee: Samsung Display Company Limited (Samsung Group)
• Inventors: LEE, Jae-Han, Son, Sunkyu, Yeo, Dong-Hyun, KIM, Taegon, Jeon, Byungkil
• Granted Patent: US 9,711,103 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2320/041 Temperature compensation
• CPC Class Codes: G09G 2330/045 Protection against panel overheating
• CPC Class Codes: G09G 2352/00 Parallel handling of streams of display data
• CPC Class Codes: G09G 2370/08 Details of image data interface between the display device controller and the data line driver circuit
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 3/3688 suitable for active matrices only
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers

Abstract

Disclosed is a display apparatus including: a display panel including pixels connected with a plurality of gate lines and a plurality of data lines; a gate driver supplying gate signals to the gate lines; and a data driver supplying data voltages to the data lines. The data driver includes a temperature measurer generating a temperature signal of the data driver.

Claims

1. A display apparatus comprising:

a display panel including pixels connected with a plurality of gate lines and a plurality of data lines;

a gate driver configured to supply gate signals to the gate lines; and

a data driver configured to supply data voltages to the data lines,

wherein the data driver includes a temperature measurer generating a temperature signal of the data driver.

2. The display apparatus according to claim 1, further comprising:

a voltage generator configured to generate power voltages driving the gate driver and data driver; and

a timing controller configured to control on- and off-states of the voltage generator in accordance with the temperature signal.

3. The display apparatus according to claim 2, wherein the data driver is configured to measure the temperature of the data driver every horizontal period under the control of the timing controller.

4. The display apparatus according to claim 2, wherein the timing controller comprises:

a transmission interface configured to transfer a plurality of interface signals to the data driver; and

a memory configured to store the temperature signal,

wherein each of the interface signals includes a data control signal controlling the data driver.

5. The display apparatus according to claim 4, wherein the data driver includes a plurality of source ICs connected respectively with a predetermined number of the data lines, each of the source ICs receiving a corresponding interface signal from the timing controller.

6. The display apparatus according to claim 5, wherein each of the source ICs is configured to generate the data voltages in response to the data control signal and the image data of the corresponding interface signal.

7. The display apparatus according to claim 5, wherein the source ICs are configured to measure internal temperatures of the source ICs, sequentially and repeatedly, responding to the data control signals and output the measured internal temperature as the temperature signal.

8. The display apparatus according to claim 5, wherein an internal temperature of the source IC corresponding to each horizontal line is measured every horizontal period.

9. The display apparatus according to claim 5, wherein the data control signal includes a monitoring signal and each of the source ICs is configured to measure an internal temperature of the source IC in response to activation of the monitoring signal of the corresponding interface signal and output the measured internal temperature as the temperature signal.

10. The display apparatus according to claim 9, wherein the monitoring signal is transferred by allocating one of bits that are prepared to transfer the data control signal.

11. The display apparatus according to claim 9, wherein the monitoring signal is sequentially activated in the interface signals during horizontal periods, and repeatedly activated corresponding to the number of the source ICs.

12. The display apparatus according to claim 9, wherein each of the source ICs includes:

a reception interface configured to receive the corresponding interface signal; and

a temperature measurer configured to measure an internal temperature of corresponding source ICs in response to the activation of the monitoring signal.

13. The display apparatus according to claim 12, wherein the temperature measurer comprises:

a temperature sensor configured to sense the internal temperature of the source ICs and output a temperature voltage corresponding to the sensed temperature; and

a comparator including a positive terminal supplied with the temperature voltage, and a negative terminal coupled with a reference voltage corresponding to a temperature under which the source ICs operate normally.

14. The display apparatus according to claim 13, wherein the comparator is configured to output the temperature signal if the temperature voltage is higher than the reference voltage.

15. The display apparatus according to claim 5, wherein the timing controller is configured to turn off the voltage generator if the temperature signal is supplied more than predetermined times from any one of the source ICs.

16. The display apparatus according to claim 15, wherein the predetermined times is once.

17. The display apparatus according to claim 5, wherein the temperature signal output from each of the source ICs is stored in a corresponding bit of the memory.

18. The display apparatus according to claim 5, wherein the interface signal further includes a line start signal informing a beginning of line and a horizontal blank signal for blank period, wherein the line start signal, the data control signal, the image data and the horizontal blank signal are output in sequence, and the temperature signal is supplied to the timing controller during the horizontal blank signal.

19. The display apparatus according to claim 2, wherein the timing controller is configured to output a gate control signal and the gate driver sequentially outputs the gate signals in response to the gate control signal.