# US 11,307,700 B2 · Timing controller for controlling emission of emission element for recognizing touch coordinates and electronic device including the same

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- Number: US 11,307,700 B2
- Document ID: US11307700B2
- Status: Granted
- Kind: B2
- Application number: 17/169,722
- Filed: 2021-02-08
- Published: 2021-08-12
- Granted: 2022-04-19
- Earliest claimed: 2020-02-10
- Assignees: Silicon Works Co., Ltd.
- Applicants: Silicon Works Co., Ltd.
- Inventors: You Jin Kwon; Sang Kwon Kim; Chang Sung Hong; Pyeong Keun Oh; Jun Ho Kwak
- Web page: https://patentgrep.com/patent/US11307700B2

## CPC

- G06F 3/0412: {Digitisers structurally integrated in a display}
- G06F 3/03542: {Light pens for emitting or receiving light}
- G06F 3/03545: {Pens or stylus}
- G06F 3/0383: {Signal control means within the pointing device}
- G06F 3/0386: {for light pen}
- G06F 3/04166: {Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184)}
- G06F 3/0421: {by interrupting or reflecting a light beam, e.g. optical touch-screen}
- G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element
- G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
- G09G 2310/08: Details of timing specific for flat panels, other than clock recovery
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

Disclosed is a timing controller including a coordinate data generation circuit configured to generate X coordinate emission data for acquiring X coordinates and Y coordinate emission data for acquiring Y coordinates of touch coordinates, a selection circuit configured to time-divide 1 frame duration, to output the X coordinate emission data to a display driving circuit during an X coordinate field, and to output the Y coordinate emission data to the display driving circuit during a Y coordinate field, and a control data generation circuit configured to output control data for allowing each pixel to emit light in units of data line groups including i data lines using the X coordinate emission data during the X coordinate field and for allowing each pixel to emit light in units of gate lines including j gate lines using the Y coordinate emission data during the Y coordinate field, to the display driving circuit.

## Claims

### Claim 1

A timing controller for controlling emission of an emission element for recognizing touch coordinates, the timing controller comprising:
a coordinate data generation circuit configured to generate X coordinate emission data for acquiring X coordinates and Y coordinate emission data for acquiring Y coordinates of touch coordinates;
a selection circuit configured to time-divide 1 frame duration, to output the X coordinate emission data to a display driving circuit during an X coordinate field, and to output the Y coordinate emission data to the display driving circuit during a Y coordinate field; and
a control data generation circuit configured to output control data for allowing each pixel to emit light in units of data line groups including i (i being a natural number equal to or greater than 2) data lines using the X coordinate emission data during the X coordinate field and for allowing each pixel to emit light in units of gate line groups including j (j being a natural number equal to or greater than 2) gate lines using the Y coordinate emission data during the Y coordinate field, to the display driving circuit,
wherein the control data generation circuit is configured to allow pixels connected to two or more gate lines included in each gate line group to simultaneously emit light in units of the gate line groups during the Y coordinate field.

### Claim 2 (depends on 1)

The timing controller of claim 1, wherein:
a display panel comprises m data line groups obtained by grouping w data lines in units of the i data lines and n gate line groups obtained by grouping h gate lines in units of the j gate lines; and
the control data comprises a first data output enable signal comprising m data pulses for sequentially outputting the X coordinate emission data to the m data line groups during the X coordinate field, and a first gate output enable signal for simultaneously outputting gate pulses to the h gate lines in response to each of the m data pulses.

### Claim 3 (depends on 2)

The timing controller of claim 2, wherein the m is determined using an X-direction resolution value and an X coordinate precision value of the display panel.

### Claim 4 (depends on 1)

The timing controller of claim 1, wherein:
a display panel comprises m data line groups obtained by grouping w data lines in units of the i data lines and n gate line groups obtained by grouping h gate lines in units of the j gate lines; and
the control data comprises a second data output enable signal comprising n data pulses for simultaneously outputting the Y coordinate emission data to the w data lines in units of the gate line groups during the Y coordinate field, and a second gate output enable signal for sequentially outputting gate pulses synchronized with the n data pulses, respectively, to each of the gate line groups, during the Y coordinate field.

### Claim 5 (depends on 4)

The timing controller of claim 4, wherein the n is determined using a Y-direction resolution value and a Y coordinate precision value of the display panel.

### Claim 6 (depends on 1)

The timing controller of claim 1, wherein:
the i is determined as an X coordinate precision value, and the j is determined as a Y coordinate precision value; and
the X coordinate precision value is determined as a number of X-direction pixels to be recognized by a pen at one time for acquiring the touch coordinates among pixels included in a display panel, and the Y coordinate precision value is determined as a number of Y-direction pixels to be recognized by the pen at one time among the pixels included in the display panel.

### Claim 7 (depends on 1)

The timing controller of claim 1, wherein:
the selection circuit outputs image data to the display driving circuit during a display field included in the 1 frame duration; and
the control data comprises a third data output enable signal and a third gate output enable signal for allowing each pixel to sequentially emit light in units of 1 gate line during the display field.

### Claim 8 (depends on 1)

The timing controller of claim 1, wherein the X coordinate emission data and the Y coordinate emission data have a grayscale value equal to or less than a predetermined reference to prevent emission of a pixel based on the X coordinate emission data and the Y coordinate emission data from being perceived by a user's eye.

### Claim 9 (depends on 1)

The timing controller of claim 1, wherein the X coordinates are determined using a detection timing at which an emission signal due to emission of a pixel that comes into contact with a pen during the X coordinate field is detected, and the Y coordinates are determined using a detection timing at which an emission signal due to emission of the pixel that comes into contact with the pen during Y coordinate field is detected.

### Claim 10

An electronic device comprising:
a display panel comprising m data line groups obtained by grouping w data lines in units of i (i being a natural number equal to or greater than 2) data lines and n gate line groups obtained by grouping h gate lines in units of j (j being a natural number equal to or greater than 2) gate lines;
a timing controller configured to time-divide 1 frame duration, to generate X coordinate emission data for acquiring X coordinates of touch coordinates and first control data during an X coordinate field, and to generate Y coordinate emission data for acquiring Y coordinates and second control data during a Y coordinate field; and
a display driving circuit configured to allow each pixel to emit light in units of the data line groups using the X coordinate emission data according to the first control data during the X coordinate field and to allow each pixel to emit light in units of the gate line groups using the Y coordinate emission data according to the second control data during the Y coordinate field,
wherein the display driving circuit is configured to allow pixels connected to two or more gate lines included in each gate line group to simultaneously emit light in units of the gate line groups during the Y coordinate field.

### Claim 11 (depends on 10)

The electronic device of claim 10, wherein:
the first control data comprises a first data output enable signal having m data pulses for sequentially outputting the X coordinate emission data to the m data line groups during the X coordinate field, and a first gate output enable signal for simultaneously outputting gate pulses to the h gate lines in response to each of the m data pulses.

### Claim 12 (depends on 10)

The electronic device of claim 10, wherein:
the second control data comprises a second data output enable signal having n data pulses for simultaneously outputting the Y coordinate emission data to the w data lines in units of the gate line groups during the Y coordinate field, and a second gate output enable signal for sequentially outputting gate pulses synchronized with the n data pulses, respectively, in units of the gate line groups during the Y coordinate field.

### Claim 13 (depends on 10)

The electronic device of claim 10, wherein the m is determined using an X-direction resolution value and an X coordinate precision value of the display panel, and the n is determined using a Y-direction resolution value and a Y coordinate precision value of the display panel.

### Claim 14 (depends on 10)

The electronic device of claim 10, wherein:
the i is determined as an X coordinate precision value, and the j is determined as a Y coordinate precision value; and
the X coordinate precision value is determined as a number of X-direction pixels to be recognized by a pen at one time for acquiring the touch coordinates among pixels included in a display panel, and the Y coordinate precision value is determined as a number of Y-direction pixels to be recognized by the pen at one time among the pixels included in the display panel.

### Claim 15 (depends on 10)

The electronic device of claim 10, further comprising a pen configured to acquire the touch coordinates via contact with the display panel,
wherein the pen determines the X coordinates using a first detection timing at which an emission signal of a pixel that comes into contact with the pen is detected during the X coordinate field, and determines the Y coordinates using a second detection timing at which an emission signal of a pixel that comes into contact with the pen is detected during the Y coordinate field.

### Claim 16 (depends on 15)

The electronic device of claim 15, wherein the pen determines an ordinal number of a first target data pulse corresponding to a first detection timing of the emission signal among data pulses included in a first data output enable signal during the X coordinate field as the X coordinates, and determines an ordinal number of a second target data pulse corresponding to a second detection timing of the emission signal among data pulses included in a second data output enable signal in the Y coordinate field as the Y coordinates of the touch coordinates.

### Claim 17 (depends on 16)

The electronic device of claim 16, wherein the ordinal number of the first target data pulse is determined using a time difference to the first detection timing from a rising edge of a vertical synchronization signal, and the ordinal number of the second target data pulse is determined using a time difference to the second detection timing from the rising edge of the vertical synchronization signal.

### Claim 18 (depends on 15)

The electronic device of claim 15, wherein, when detecting a plurality of emission signals from a plurality of pixels during the X coordinate field or the Y coordinate field, the pen determines the X coordinates or the Y coordinates by averaging ordinal numbers of target data pulses that respectively correspond to detection times of the plurality of emission signals or determines any one of the target data pulses, as the X coordinates or the Y coordinates.

### Claim 19 (depends on 10)

The electronic device of claim 10, wherein:
the timing controller outputs image data and third control data for outputting the image data to the display driving circuit during a display field included in the 1 frame duration; and
the display driving circuit allows pixels to sequentially emit light in units of 1 gate line according to the third control data during the display field.

### Claim 20 (depends on 10)

The electronic device of claim 10, wherein the X coordinate emission data and the Y coordinate emission data have a grayscale value equal to or less than a predetermined reference to prevent emission of a pixel based on the X coordinate emission data and the Y coordinate emission data from being perceived by a user's eye.