Method and apparatus for shifting display driving frequency to avoid noise of electronic sensor module

Patent metadata

Field	Value
Publication number	US-9728144-B2
Application number	US-201514596466-A
Country	US
Kind code	B2
Filing date	Jan 14, 2015
Priority date	Jan 17, 2014
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A method and apparatus for shifting a display driving frequency to avoid a noise of an electronic sensor module is provided. The method for operating of an electronic device includes detecting a driving frequency of a divider in an operating module of the electronic device, determining whether an offset exists in the detected driving frequency, and controlling an oscillation frequency of an oscillator in the operating module.

First claim

What is claimed is:

1. A method for operating of an electronic device, the method comprising:
detecting a driving frequency of a divider of a display module in the electronic device, the driving frequency being a frequency for driving a display panel, the driving frequency being, at the divider, generated based on an oscillation frequency received from an oscillator included in the display module;
comparing the detected driving frequency with a pre-set frequency control information stored in a memory, the pre-set frequency control information comprising a plurality of frequency ranges, the plurality of frequency ranges respectively corresponding to a plurality of offset values;
selecting an offset value among the plurality of offset values, the offset value corresponding to a frequency range which the detected driving frequency belongs to among the plurality of frequency ranges;
generating control data comprising the offset value; and
outputting the control data to a driver included in the display module,
wherein the driver controls the oscillator based on the control data such that the oscillation frequency is shifted according to the offset value.

2. The method of claim 1 , wherein the detecting of the driving frequency comprises converting a driving frequency signal of the divider in the display module into digital data.

3. The method of claim 1 , wherein the offset value is determined by testing before manufacturing of the electronic device.

4. The method of claim 1 , wherein the driving frequency comprises one or more of a gate driving frequency and a source driving frequency in the display module.

5. The method of claim 1 ,
wherein the divider and the driver comprise a control Application Specific Integrated Circuit (ASIC) integral to the display module, and
wherein the oscillator comprises a Resistor Capacitor (RC) oscillator integral to the display module.

6. A non-transitory computer-readable storage medium storing a program for performing the method according to claim 1 .

7. An electronic device comprising:
a display module comprising an oscillator, a divider, a driver, and a display panel; and
a controller configured to:
detect a driving frequency of the divider and control an oscillation frequency of the oscillator, the driving frequency being a frequency for driving the display panel, the driving frequency being, at the divider, generated based on an oscillation frequency received from the oscillator,
compare the detected driving frequency with a pre-set frequency control information stored in a memory, the pre-set frequency control information comprising a plurality of frequency ranges, the plurality of frequency ranges respectively corresponding to a plurality of offset values,
select an offset value among the plurality of offset values, the offset value corresponding to a frequency range which the detected driving frequency belongs to among the plurality of frequency ranges,
generate control data comprising the offset value, and
output the control data to the driver included in the display module,

wherein the driver controls the oscillator based on the control data such that the oscillation frequency is shifted according to the offset value.

8. The electronic device of claim 7 , wherein the controller is further configured to convert a driving frequency signal of the divider into digital data and detect the driving frequency, or receive the driving frequency converted into the digital data.

9. The method of claim 7 , wherein the offset value is determined by testing before manufacturing of the electronic device.

10. The electronic device of claim 7 , wherein the driving frequency comprises one or more of a gate driving frequency and a source driving frequency of the display module.

11. The electronic device of claim 7 ,
wherein the divider and the driver comprise a control Application Specific Integrated Circuit (ASIC) integral to the display module, and
wherein the oscillator comprises a Resistor Capacitor (RC) oscillator in the display module.

12. The electronic device of claim 7 , wherein the controller comprises a micro control unit integral to a processor of the electronic device.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Han Ju-Hee
• Lee Joo-Hoon

Classifications

• G09G3/20

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• G09G2330/06

  Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation · CPC title

• H03L3/00

  Starting of generators · CPC title

• G09G3/36 Primary

  using liquid crystals · CPC title

• H03B5/20 Primary

  with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator · CPC title