Display control circuit, display control method and display device

Patent metadata

Field	Value
Publication number	US-10394333-B2
Application number	US-201615512490-A
Country	US
Kind code	B2
Filing date	May 11, 2016
Priority date	Mar 16, 2016
Publication date	Aug 27, 2019
Grant date	Aug 27, 2019

Abstract

A display control circuit, a display control method and a display device are provided. The display control circuit includes a gesture identifying unit and a display control unit. The gesture identifying unit includes a millimeter wave signal transceiver module and a gesture detector. The millimeter wave signal transceiver module is configured to transmit a first millimeter wave signal and receive a second millimeter wave signal that is reflected back. The gesture detector is configured to process and identify the second millimeter wave signal, to detect a gesture within a predetermined range around the display panel. The display control unit is configured to control the display panel based on the gesture.

First claim

What is claimed is:

1. A display control circuit for controlling a display panel, wherein the display control circuit comprises:
a gesture identifying unit comprising a millimeter wave signal transceiver module and a gesture detection circuit, wherein the millimeter wave signal transceiver module is configured to transmit a first millimeter wave signal and receive a second millimeter wave signal that is reflected back, and the gesture detection circuit is configured to process and identify the second millimeter wave signal, to detect a gesture within a predetermined range around the display panel for the display control circuit to control the display panel based on the gesture.

2. The display control circuit according to claim 1 , wherein the display panel is a transparent display panel.

3. The display control circuit according to claim 2 , wherein the millimeter wave signal transceiver module comprises a transceiver antenna, and the gesture detection circuit comprises a transceiver front-end module and a signal processing module, wherein
the transceiver front-end module is configured to generate the first millimeter wave signal,
the transceiver antenna is configured to transmit the first millimeter wave signal and receive the second millimeter wave signal that is reflected back,
the transceiver front-end module is further configured to process the second millimeter wave signal to obtain an intermediate-frequency signal, and
the signal processing module is configured to amplify the intermediate-frequency signal and detect the gesture within the predetermined range around the display panel based on the amplified intermediate-frequency signal.

4. The display control circuit according to claim 3 , wherein a frequency of the intermediate-frequency signal is larger than or equal to 5 kilohertz, and smaller than or equal to 1 megahertz.

5. The display control circuit according to claim 4 , wherein the transceiver front-end module comprises:
a voltage-controlled oscillator configured to generate the first millimeter wave signal in response to an external modulating signal;
a mixer configured to mix the second millimeter wave signal and a local oscillator signal, to obtain a mixed signal; and
a band-pass filter configured to subject the mixed signal to a band-pass filtering process, to obtain the intermediate-frequency signal.

6. The display control circuit according to claim 1 , wherein
the gesture detection circuit is further configured to identify at least one of a movement direction, a movement speed, and a movement distance in regard to the gesture for the display control circuit to control the display panel based on the at least one of the movement direction, the movement speed, and the movement distance in regard to the gesture.

7. The display control circuit according to claim 6 , wherein the millimeter wave signal transceiver module comprises a transceiver antenna, and the gesture detection circuit comprises a transceiver front-end module and a signal processing module, wherein
the transceiver front-end module is configured to generate the first millimeter wave signal,
the transceiver antenna is configured to transmit the first millimeter wave signal and receive the second millimeter wave signal that is reflected back,
the transceiver front-end module is further configured to process the second millimeter wave signal to obtain an intermediate-frequency signal, and
the signal processing module is configured to amplify the intermediate-frequency signal and detect the gesture within the predetermined range around the display panel based on the amplified intermediate-frequency signal.

8. The display control circuit according to claim 7 , wherein a frequency of the intermediate-frequency signal is larger than or equal to 5 kilohertz, and smaller than or equal to 1 megahertz.

9. The display control circuit according to claim 8 , wherein the transceiver front-end module comprises:
a voltage-controlled oscillator configured to generate the first millimeter wave signal in response to an external modulating signal;
a mixer configured to mix the second millimeter wave signal and a local oscillator signal, to obtain a mixed signal; and
a band-pass filter configured to subject the mixed signal to a band-pass filtering process, to obtain the intermediate-frequency signal.

10. The display control circuit according to claim 1 , wherein the millimeter wave signal transceiver module comprises a transceiver antenna, and the gesture detection circuit comprises a transceiver front-end module and a signal processing module, wherein
the transceiver front-end module is configured to generate the first millimeter wave signal,
the transceiver antenna is configured to transmit the first millimeter wave signal and receive the second millimeter wave signal that is reflected back,
the transceiver front-end module is further configured to process the second millimeter wave signal to obtain an intermediate-frequency signal, and
the signal processing module is configured to amplify the intermediate-frequency signal and detect the gesture within the predetermined range around the display panel based on the amplified intermediate-frequency signal.

11. The display control circuit according to claim 10 , wherein a frequency of the intermediate-frequency signal is larger than or equal to 5 kilohertz, and smaller than or equal to 1 megahertz.

12. The display control circuit according to claim 11 , wherein the transceiver front-end module comprises:
a voltage-controlled oscillator configured to generate the first millimeter wave signal in response to an external modulating signal;
a mixer configured to mix the second millimeter wave signal and a local oscillator signal, to obtain a mixed signal; and
a band-pass filter configured to subject the mixed signal to a band-pass filtering process, to obtain the intermediate-frequency signal.

13. The display control circuit according to claim 12 , wherein the transceiver front-end module further comprises:
a signal isolator, connected to each of the transceiver antenna, the voltage-controlled oscillator and the mixer, and configured to isolate the first millimeter wave signal and the second millimeter wave signal from each other, transmit to the transceiver antenna the first millimeter wave signal transmitted from the voltage-controlled oscillator, and transmit to the mixer the second millimeter wave signal transmitted from the transceiver antenna.

14. The display control circuit according to claim 13 , wherein the signal processing module comprises:
a low-noise preamplifier configured to subject the intermediate-frequency signal to a low noise amplifying process;
an automatic gain control amplifier configured to subject the intermediate-frequency signal subjected to the low noise amplifying process to an automatic gain control amplifying process;
a high-gain amplifier configured to subject the intermediate-frequency signal subjected to the automatic gain control amplifying process to a high-gain amplifying process; and
a digital signal processor configured to detect the gesture within the predetermined range around the display panel based on the intermediate-frequency signal subjected to the high-gain amplifying process and identify at least one of a movement direction, a movement speed, and a movement distance in regard to the gesture.

15. The display control circuit according to claim 1 , wherein the predetermined range is within 1 meter from the display panel.

16. A display device comprising a display panel and the display control circuit according to cl

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Multimedia Technology Co Ltd

Inventors

• Cheng Peng
• Yu Shuhuan
• Su Junning
• He Jianzi
• Wan Haiyan

Classifications

• G06F2203/04101

  2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup · CPC title

• G06F3/0488

  using a touch-screen or digitiser, e.g. input of commands through traced gestures · CPC title

• G06F3/038

  Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry · CPC title

• G06F3/017 Primary

  Gesture based interaction, e.g. based on a set of recognized hand gestures (interaction based on gestures traced on a digitiser G06F3/04883) · CPC title

• G09G3/20 Primary

  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