DISPLAY APPARATUS

• US 20110102389A1
• Filed: 05/20/2010
• Published: 05/05/2011
• Est. Priority Date: 11/05/2009
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: AHN, Si Hyun, PARK, Kyung-ho, KIM, So-Young
• Application Number:
  US12/783,991
• Publication Number:
  US 20110102389A1
• Time in Patent Office: Days
• US Class Current: 345/205
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally

Abstract

A display apparatus includes; a display panel which includes a plurality of pixels which receive a data signal to display an image, a plurality of sensors disposed within the display panel, wherein the plurality of sensors sense an external signal from an exterior of the display apparatus and output a sensing signal corresponding to the external signal, a data driver which provides the data signal to the plurality of pixels, a gate driver which outputs a plurality of gate signals to the plurality of pixels, and a sensor driver which includes a plurality of stages which output a plurality of sensor scan signals to the plurality of sensors, wherein the sensor driver sequentially drives the plurality of stages in a first scan mode and divides the plurality of stages into two groups of stages and alternately drives the two groups of stages in subsequent frames in a second scan mode.

Claims

1. A display apparatus comprising:

a display panel which includes a plurality of pixels which receive a data signal to display an image;

a plurality of sensors disposed within the display panel, wherein the plurality of sensors sense an external signal from an exterior of the display apparatus and output a sensing signal corresponding to the external signal;

a data driver which provides the data signal to the plurality of pixels;

a gate driver which outputs a plurality of gate signals to the plurality of pixels; and

a sensor driver which includes a plurality of stages which output a plurality of sensor scan signals to the plurality of sensors,

wherein the sensor driver sequentially drives the plurality of stages in a first scan mode, and divides the plurality of stages into two groups of stages and alternately drives the two groups of stages in a second scan mode.

2. The display apparatus of claim 1, wherein a first stage of the plurality of stages starts an operation thereof in response to a first start signal, a second stage of the plurality of stages starts an operation thereof in response to a second start signal and the sensor driver drives the stages in either the first scan mode or the second scan mode in accordance with a timing of the first start signal and the second start signal.

3. The display apparatus of claim 2, wherein each of the plurality of sensor scan signals is maintained at a logic high state during one scan period, and the second start signal is delayed to be later than the first start signal by one half a scan period in the first scan mode.

4. The display apparatus of claim 3, wherein odd stages of the plurality of stages are connected to each other one after another, even stages of the plurality of stages are connected to each other one after another, a (4k-3)-th stage of the plurality of stages receives a first clock signal, a (4k-2)-th stage of the plurality of stages receives a second clock signal, a (4k-1)-th stage of the plurality of stages receives a first clock bar signal and a 4k-th stage of the plurality of stages receives a second clock bar signal, wherein k is an integer equal to or larger than 1.

5. The display apparatus of claim 4, wherein each of the first clock signal, the second clock signal, the first clock bar signal and the second clock bar signal has a high period corresponding in length to the scan period, the second clock signal is delayed to be later than the first clock signal by one half a scan period, the first clock bar signal has a phase substantially opposite to the first clock signal, and the second clock bar signal has a phase substantially opposite to the second clock signal.

6. The display apparatus of claim 2, wherein the sensor driver comprises a first group of stages including a plurality of odd stages connected to each other one after another among the plurality of stages and a second group of stages including a plurality of even stages connected to each other one after another among the plurality of stages, and the first group of stages and the second group of stages are alternately operated in subsequent frames during the second scan mode.

7. The display apparatus of claim 6, wherein the second start signal is delayed to be later than the first start signal by one frame period in the second scan mode.

8. The display apparatus of claim 7, wherein a (4k-3)-th stage of the plurality of stages receives a first clock signal, a (4k-2)-th stage of the plurality of stages receives a second clock signal, a (4k-1)-th stage of the plurality of stages receives a first clock bar signal and a 4k-th stage of the plurality of stages receives a second clock bar signal, where k is an integer equal to or larger than 1.

9. The display apparatus of claim 8, wherein each of the first clock signal, the second clock signal, the first clock bar signal and the second clock bar signal has a high period corresponding in length to the scan period, the first clock signal and the second clock signal have a same phase, and the first clock bar signal and the second clock bar signal have a same phase which is substantially opposite to the first clock signal.

10. The display apparatus of claim 2, wherein the sensor driver further comprises a plurality of dummy stages each of which is positioned between two adjacent stages of the plurality of stages.

11. The display apparatus of claim 10, wherein odd stages of the plurality of stages receive a first clock signal, even stages of the plurality of stages receive a second clock signal, odd dummy stages of the plurality of dummy stages receive a first clock bar signal, and even dummy stages of the plurality of dummy stages receive a second clock bar signal.

12. The display apparatus of claim 11, wherein each of the first clock signal, the second clock signal, the first clock bar signal and the second clock bar signal has a high period corresponding in length to the scan period, the first clock signal and the second clock signal have an opposite phase to each other, the first clock bar signal has an opposite phase to the first clock signal and the second clock bar signal has an opposite phase to the second clock signal.

13. The display apparatus of claim 11, wherein an output signal from a q-th dummy stage is provided to a (q+2)-th stage and an output signal from a q-th stage is provided to a q-th dummy stage, wherein q is an integer equal to or larger than 1.

14. The display apparatus of claim 2, further comprising a timing controller which controls the timing of the first start signal and the second start signal in response to a mode selection signal and provides the first start signal and the second start signal to the sensor driver.

15. The display apparatus of claim 1, wherein the display panel comprises an array substrate and an opposite substrate coupled with, and disposed substantially opposite to, the array substrate, the plurality of pixels are arranged on the array substrate, and the plurality of sensors are arranged on the opposite substrate.

16. The display apparatus of claim 15, wherein the gate driver and the sensor driver are directly disposed on the array substrate and the opposite substrate, respectively.

17. The display apparatus of claim 15, further comprising a read-out circuit disposed on the opposite substrate, wherein the read-out circuit receives the sensing signal from the plurality of sensors, and processes the sensing signal.

18. A display apparatus comprising:

a display panel comprising;

an array substrate on which a plurality of pixels which receive an image signal is arranged; and

an opposite substrate coupled with the array substrate;

a plurality of sensors disposed within the display panel, wherein the plurality of sensors sense an external signal and output a sensing signal corresponding to the external signal;

a data driver which provides the image signal to the plurality of pixels;

a gate driver which outputs a plurality of gate signals to the plurality of pixels;

a first sensor driver comprising a plurality of first stages which are operated in a first scan mode and sequentially output a plurality of first scan signals to the plurality of sensors; and

a second sensor driver comprising a plurality of second stages, wherein the plurality of second stages are divided into two groups which are alternately operated in a second scan mode, and wherein the plurality of second stages output a plurality of second scan signals through each of the two groups to the plurality of sensors.

19. The display apparatus of claim 18, wherein a first stage of the plurality of second stages starts an operation thereof in response to a first start signal, a second stage of the plurality of second stages starts an operation thereof in response to a second start signal, and the second start signal is delayed to be later than the first start signal by one frame period.

20. The display apparatus of claim 19, wherein a (4k-3)-th stage of the plurality of second stages receives a first clock signal, a (4k-2)-th stage of the plurality of second stages receives a second clock signal, a (4k-1)-th stage of the plurality of second stages receives a first clock bar signal, a 4k-th stage of the plurality of second stages receives a second clock bar signal, the first clock signal and the second clock signal have substantially a same phase, and the first clock bar signal and the second clock bar signal have a substantially same phase which is substantially opposite to the phase of the first clock signal.

21. A method of driving a sensor driver including a plurality of stages which output a plurality of sensor scan signals to a plurality of sensors, the method comprising:

sequentially driving the plurality of stages in a first scan mode;

dividing the plurality of stages into two groups of stages and alternately driving the two groups of the stages in a second scan mode.