SOURCE DRIVER INTEGRATED CIRCUIT, CONTROLLER, ORGANIC LIGHT EMITTING DISPLAY PANEL, ORGANIC LIGHT EMITTING DISPLAY DEVICE, AND METHOD FOR DRIVING ORGANIC LIGHT EMITTING DISPLAY DEVICE

• US 20170004776A1
• Filed: 06/29/2016
• Published: 01/05/2017
• Est. Priority Date: 06/30/2015
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Park, YongKyu
• Granted Patent: US 10,339,872 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2300/0819 used for counteracting undesired variations, e.g. feedback or autozeroing
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2310/0264 Details of driving circuits
• CPC Class Codes: G09G 2310/0286 Details of a shift registers arranged for use in a driving circuit
• CPC Class Codes: G09G 2310/0297 Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0295 by monitoring each display pixel
• CPC Class Codes: G09G 2320/045 Compensation of drifts in the characteristics of light emitting or modulating elements
• CPC Class Codes: G09G 3/30 using electroluminescent panels
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3275 Details of drivers for data electrodes

Abstract

There are provided a source driver integrated circuit, a controller, an organic light emitting display panel, an organic light emitting display device, and a method for driving the organic light emitting display device. Thus, it is possible to provide a structure in which different sensing components configured to sense sub-pixel characteristics can sense characteristics of the same sub-pixel together, and the structure enables more accurate recognition of a sensing difference between the sensing components on the basis of sensing values obtained from the respective sensing components and the sensing difference to be corrected using the recognized sensing difference. Thus, an image quality can be improved.

Claims

1. An organic light emitting display device comprising:

a first source driver integrated circuit electrically connected to Q (Q≧

1) number of first sensing lines;

a second source driver integrated circuit electrically connected to S (S≧

1) number of second sensing lines; and

at least one difference sensing line configured to electrically connect at least one of the S number of second sensing lines and the first source driver integrated circuit.

2. The organic light emitting display device according to claim 1,

wherein the Q number of first sensing lines are electrically connected to a first sub-pixel which is supplied with a data voltage from the first source driver integrated circuit,

the S number of second sensing lines are electrically connected to a second sub-pixel which is supplied with a data voltage from the second source driver integrated circuit, and

the at least one difference sensing line is not electrically connected to the first sub-pixel which is supplied with a data voltage from the first source driver integrated circuit but electrically connected to the second sub-pixel which is supplied with a data voltage from the second source driver integrated circuit.

3. The organic light emitting display device according to claim 1,

wherein the at least one difference sensing line is located in an organic light emitting display panel.

4. The organic light emitting display device according to claim 1,

wherein the at least one difference sensing line is located in a printed circuit board electrically connected to the first source driver integrated circuit and the second source driver integrated circuit.

5. The organic light emitting display device according to claim 1,

wherein the first source driver integrated circuit includes a first analog-digital converter electrically connected to the Q number of first sensing lines and electrically connected to the at least one difference sensing line, and

the second source driver integrated circuit includes a second analog-digital converter electrically connected to the S number of second sensing lines.

6. The organic light emitting display device according to claim 5,

wherein the first source driver integrated circuit further includes a first sample and hold circuit configured to store a voltage of each of the Q number of first sensing lines and the at least one difference sensing line between the Q number of first sensing lines/the at least one difference sensing line and the first analog-digital converter, and

the second source driver integrated circuit further includes a second sample and hold circuit configured to store a voltage of each of the S number of second sensing lines between the S number of second sensing lines and the second analog-digital converter.

7. The organic light emitting display device according to claim 5, further comprising:

an analog-digital conversion difference correction unit configured to receive first sensing data including first neighbor sensing value converted into a digital value from an analog voltage value of each of at least one second sensing line from the first analog-digital converter within the first source driver integrated circuit through the at least one difference sensing line, receive second sensing data including a second sensing value converted into a digital value from an analog voltage value of the at least one second sensing line from the second analog-digital converter within the second source driver integrated circuit, compare the first sensing data and the second sensing data, recognize an analog-digital conversion difference between the first analog-digital converter and the second analog-digital converter on the basis of a comparison result, and perform an analog-digital conversion difference correction process.

8. The organic light emitting display device according to claim 7,

wherein if there are two or more difference sensing lines, the analog-digital conversion difference correction unit,

calculates a first average sensing value by averaging two or more first neighbor sensing values included in the first sensing data received from the first analog-digital converter,

calculates a second average sensing value by averaging two or more sensing values included in the second sensing data received from the second analog-digital converter,

recognizes the analog-digital conversion difference on the basis of a difference between the first average sensing value and the second average sensing value, and

performs the analog-digital conversion difference correction process by correcting at least one of sensing data to be received from the first analog-digital converter and sensing data to be received from the second analog-digital converter on the basis of the analog-digital conversion difference.

9. The organic light emitting display device according to claim 1,

wherein if there is one difference sensing line, the one difference sensing line and one of the S number of second sensing lines electrically connected to the second source driver integrated circuit are disposed as one body on the same layer.

10. The organic light emitting display device according to claim 1,

wherein if there are two or more difference sensing lines,

two or more second sensing lines of the S number of second sensing lines electrically connected to the second source driver integrated circuit and two or more difference sensing lines electrically connected to the first source driver integrated circuit are disposed on the same layer as being separated from each other,

between one of the two or more difference sensing lines and one of the two or more second sensing lines, another one of the two or more difference sensing lines or another one of the two or more second sensing lines is present, and

the one of the two or more difference sensing lines and the one of the two or more second sensing lines are electrically connected to each other through a connection line disposed on another layer.

11. An organic light emitting display panel comprising:

a plurality of sub-pixels;

a plurality of data lines configured to supply a data voltage;

a plurality of sensing lines electrically connected to a corresponding sub-pixel; and

at least one difference sensing line of which one end is connected to a first driver connection area and the other end is connected to one of S (S≧

1) number of sensing lines corresponding to a second driver connection area.

12. The organic light emitting display panel according to claim 11,

wherein each of the S number of sensing lines is connected to a transistor within a sub-pixel.

13. A source driver integrated circuit comprising:

D number of output buffers corresponding to D (D≧

1) number of data channels;

D number of digital-analog converters corresponding to the D number of data channels; and

an analog-digital converter electrically connected to S number of sensing lines through S (S≧

1) number of sensing channels and electrically connected to at least one difference sensing line through at least one difference sensing channel.

14. The source driver integrated circuit according to claim 13,

wherein the analog-digital converter is electrically connected to the at least one difference sensing line through the at least one difference sensing channel, and thus

electrically connected to at least one sensing line connected to the at least one difference sensing line among S number of sensing lines connected to another source driver integrated circuit.

15. An organic light emitting display device comprising:

a first analog-digital converter electrically connected to Q (Q≧

1) number of first sensing lines;

a second analog-digital converter electrically connected to S (S≧

1) number of second sensing lines; and

at least one difference sensing line configured to electrically connect at least one of the S number of second sensing lines and the first analog-digital converter.

16. A method for driving an organic light emitting display device including a first source driver integrated circuit and a second source driver integrated circuit, comprising:

sensing an analog voltage value of a second sensing line electrically connected to a second analog-digital converter within the second source driver integrated circuit and converting the analog voltage value into a second sensing value, which is a digital value, by the second analog-digital converter;

sensing the analog voltage value of the second sensing line electrically connected to a difference sensing line electrically connected to a first analog-digital converter within the first source driver integrated circuit and converting the analog voltage value into a first neighbor sensing value, which is a digital value, by the first analog-digital converter through the difference sensing line; and

correcting an analog-digital conversion difference between the first analog-digital converter and the second analog-digital converter by comparing the first neighbor sensing value and the second sensing value.

17. The method for driving an organic light emitting display device according to claim 16,

wherein both the first neighbor sensing value and the second sensing value include a voltage component among sub-pixel characteristics of a sub-pixel connected to the second sensing line.

18. A controller comprising:

a first sensing data receiving unit configured to receive first sensing data including a first neighbor sensing value generated by a first analog-digital converter;

a second sensing data receiving unit configured to receive second sensing data including a second sensing value generated by a second analog-digital converter; and

an analog-digital conversion difference correction unit configured to correct first sensing value and second sensing value to be received on the basis of the first neighbor sensing value and the second sensing value,

wherein the first neighbor sensing value and the second sensing value are sensing values of characteristics of the same sub-pixel.

19. The controller according to claim 18,

wherein the first sensing data further includes first sensing value of characteristics of sub-pixels which are data-driven by a first source driver integrated circuit including the first analog-digital converter.