TWI409680B - Infrared controlling device - Google Patents

Abstract

An infrared controlling device, includes a plurality of infrared emitters and infrared receivers, an infrared light control circuit, an infrared receiving control circuit, a processor and a display panel. The infrared emitters and infrared receivers are staggered arranged below the display panel and face the same direction. The infrared light control circuit controls the infrared emitters to emit infrared signal under the controlling of the processor. The infrared receiving control circuit controls the infrared receivers to receive the infrared signals which are reflected by users who operates the device, samples the states of the infrared receivers, and sends the state sampling signals to the processor. The processor includes an infrared processing unit and an infrared controlling unit. The infrared processing unit determines the operated point on the device according to the state sampling signals. The infrared controlling unit outputs a corresponding control signal to activate the function corresponding to the operated point.

Description

Infrared control device

The present invention relates to an infrared control device, and more particularly to a non-contact infrared control device.

Infrared technology has been widely used in touch applications. For example, infrared touch screens are equipped with a plurality of pairs of infrared emitting tubes and infrared receiving tubes in a certain order on the periphery of a display screen. The infrared rays form a grid structure on the surface of the display screen. When there is a touch, a finger or other object blocks the infrared rays passing through the point, and the control system determines the position of the touch point on the display screen. However, the conventional infrared touch screen requires the infrared transmitting tube and the infrared receiving tube to be disposed at the edge of the display screen, and requires the electronic device to reserve a certain space for transmitting the infrared light, thereby making the electronic device using the infrared touch screen difficult to meet the thinning and small. Dimensional design requirements. In addition, the user directly touches the screen to operate, the screen is easily contaminated by dirt, and its service life is also affected.

In view of this, it is necessary to provide a thin, non-contact infrared control device.

An infrared control device includes a plurality of infrared transmitting tubes, a plurality of infrared receiving tubes, an infrared light emitting control circuit, an infrared receiving control circuit, a processor and a display panel, wherein the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes are staggered toward the display panel Arranged on display Below the panel, the processor controls the plurality of infrared transmitting tubes to emit infrared signals through an infrared light emitting control circuit, and the infrared receiving control circuit controls the plurality of infrared receiving tubes to receive the reflected infrared signals emitted from the infrared transmitting tubes for infrared receiving After the state of the tube is sampled, the state sampling signal is transmitted to the processor. The processor comprises an infrared processing unit, a control unit and a display processing unit. The infrared processing unit determines the position of the control point according to the state sampling signals of the plurality of infrared receiving tubes, and the control unit is configured to output a corresponding control signal according to the position of the control point, and start Corresponding functions, the display processing unit controls the display panel to display the corresponding interface.

The infrared control device of the invention is a non-contact control device, which arranges the infrared emission tube and the infrared receiving tube to face the display panel staggered under the display panel, and utilizes the light reflection principle to make the infrared control device have the function of no touch operation. It is easy for the user to control and keeps the panel clean. In addition, the thickness of the infrared control device can be reduced, and the infrared control device can meet the design requirements of a small size.

100‧‧‧Infrared control device

20‧‧‧Infrared emitting unit

21‧‧‧Infrared launch tube set

210‧‧‧Infrared launch tube

22‧‧‧Infrared illumination control circuit

30‧‧‧Infrared receiving unit

31‧‧‧Infrared receiving tube set

310‧‧‧Infrared receiver tube

32‧‧‧Infrared receiving control circuit

33‧‧‧Interference suppression circuit

40‧‧‧ processor

41‧‧‧Infrared processing unit

42‧‧‧Control unit

43‧‧‧Display Processing Unit

44‧‧‧Time Judging Unit

45‧‧‧storage unit

50‧‧‧ display panel

60‧‧‧ boards

61‧‧‧Protection board

62‧‧‧Light barrier

70‧‧‧ occlusion

1 is a functional block diagram of an infrared control device in the present invention.

2 is a schematic view showing the arrangement of infrared elements of the infrared control device of the present invention.

3 is a partial structural schematic view of an infrared control device in the present invention.

Referring to FIG. 1, the infrared control device 100 includes an infrared emitting unit 20, an infrared receiving unit 30, a processor 40, and a display panel 50. The infrared control device 100 can be applied to a series of electronic devices such as an electronic book, a computer, a mobile phone, and the like.

The infrared emitting unit 20 is composed of an infrared transmitting tube group 21 and an infrared light emitting control circuit 22. The infrared illumination control circuit 22 is coupled to the processor 40. The infrared transmitting tube groups 21 are numbered in a certain order, and the processor 40 controls the infrared transmitting tube group 21 to sequentially emit infrared signals by a predetermined emission power through the infrared light emitting control circuit 22, and the transmitting power of the infrared signals can be adjusted.

The infrared receiving unit 30 is composed of an infrared receiving tube group 31, an infrared receiving control circuit 32, and an interference suppressing circuit 33, and the interference suppressing circuit 33 is connected to the processor 40. The infrared receiving tube group 31 is numbered in a certain order, and the processor 40 controls the infrared receiving tube group 31 to receive the reflected infrared signal from the infrared transmitting tube group 21 through the infrared receiving control circuit 32, and the infrared receiving control circuit 32 pairs the infrared After the state of the receiving tube group 31 is sampled, the state sampling signal is transmitted to the interference suppression circuit 33 for detection shaping. After the various interference signals are removed, the state sampling signal is transmitted to the processor 40.

The processor 40 includes an infrared processing unit 41, a control unit 42, a display processing unit 43, a time judging unit 44, and a storage unit 45. The storage unit 45 stores the numbers of the infrared transmitting tube group 21 and the infrared receiving tube group 31 and its display panel 50. The corresponding coordinate value and the operation function corresponding to the coordinate value. The infrared processing unit 41 receives the state sampling signal from the infrared receiving tube group 31, and determines the position of the manipulation point based on the state sampling signal and the number of the infrared receiving tube group 31. The time judging unit 44 records the duration of the state sampling signal of the infrared receiving tube group 31, and the control unit 42 outputs a corresponding control signal according to the position of the manipulation point or the position of the manipulation point and the duration, and activates the corresponding function, and displays the processing. Unit 43 controls display panel 50 to display the corresponding interface.

Referring to FIG. 2, the infrared transmitting tube group 21 is composed of a plurality of infrared transmitting tubes 210, and the infrared receiving tube group 31 is composed of a plurality of infrared receiving tubes 310. The infrared transmitting tube 210 and the infrared receiving tube 310 are staggered in a matrix form toward the display panel. On the circuit board 60, that is, one The infrared transmitting tube 210 is adjacent to the row and the column of the infrared receiving tube 310, and the infrared transmitting tube 210 is adjacent to the row and column of the infrared receiving tube 310. The plurality of infrared receiving tubes 310 receive the reflected infrared signals emitted from the infrared emitting tube 210. In the present embodiment, the processor 40 controls an infrared transmitting tube 210 to emit an infrared light signal through the infrared light emitting control circuit 22, and the processor 40 also controls four infrared receiving around the infrared transmitting tube 210 through the infrared receiving control circuit 32. The tube 310 enters a working state.

Referring to FIG. 3 simultaneously, a display panel 50 is disposed above the infrared transmitting tube 210 and the infrared receiving tube 310. The display panel 50 is an infrared transparent panel, that is, a panel capable of transmitting infrared rays. An infrared light-transmitting protective plate 61 capable of transmitting infrared rays is further disposed above the display panel 50. In order to prevent the light emitted from the infrared emission tube 210 from being directly received by the infrared receiving tube 310 around it, in the present embodiment, a light blocking plate is disposed between the infrared transmitting tube 210 and the adjacent infrared receiving tube 310. 62.

When there is no obstructing object above the infrared transmitting tube 210, the infrared receiving tube 310 does not receive the infrared light signal from the infrared transmitting tube 210. When the obstruction 70, for example, the finger is near the infrared control device 100, the infrared light signal emitted by the corresponding infrared emission tube 210 under the obstruction 70 is reflected to the four infrared receiving tubes 310 around it. In order to cooperate with the required operating distance and avoid interference of the object above, the receiving sensitivity of the infrared receiving tube 310 can be adjusted and the transmitting power of the infrared transmitting tube 210 can be adjusted to an appropriate value for precise control, for example, a short distance of 1 cm to 10 cm. The internally reflected infrared signal can be detected, that is, the intensity of the infrared signal reflected by an object that is away from the infrared control device 100 at a certain height (for example, an object exceeding 10 cm) is insufficient to reach the reception threshold, and the object closer to the display panel 50 is closer. (if not super Infrared signals reflected by objects over 10 cm can be received by reaching the reception threshold.

When the infrared processing unit 41 detects that the intensity of one or more state sampling signals in the four infrared receiving tubes 310 in the working state reaches a receiving threshold, the infrared processing unit 41 determines that a touch point is generated. The infrared processing unit 41 queries the corresponding coordinate value according to the number of the infrared receiving tube 310 whose state sampling signal is the strongest at the time, and records the coordinate value as a reference point. In this manner, the infrared processing unit 41 continuously records a plurality of time periods, for example, reference points of four time periods, and determines a center point position according to the recorded four reference points and their corresponding state sampling signal strengths, where the center point position is occlusion The object 70 is at a corresponding control point position on the display panel 50. The control unit 42 issues a control signal according to the position of the control point to activate the function corresponding to the position of the manipulation point, and the display processing unit 43 controls the display panel 50 to display the corresponding interface.

In one embodiment, a plurality of gesture-related operations can be implemented in conjunction with the software, for example, when the finger moves over the infrared control device 100 and in a plane parallel to the display panel 50, for example, sliding upward, sliding downward, leftward When sliding or sliding to the right, the infrared processing unit 41 calculates different manipulation point positions, and determines the motion trajectory of the object, that is, the gesture, according to the change of the position of the manipulation point. The control unit 42 issues a control signal according to the gesture, and controls the infrared control device 100 to perform functions corresponding to the gesture, such as sliding up, sliding down, sliding to the left, and sliding to the right respectively to perform the up, down, left and right key functions of the keyboard.

In another embodiment, a plurality of function button icons (not shown) are disposed on the display panel 50, and each function button is illustrated with a position corresponding to one or more infrared transmitting tubes 210 and one or more infrared Receive tube 310. When the finger passes a button icon Above the button, the infrared light signal emitted by the corresponding infrared transmitting tube 210 is reflected to the infrared receiving tube 310 around it. After the infrared processing unit 41 calculates the position of the control point and queries the function indicated by the button icon corresponding to the position of the control point, the control unit 42 issues a control signal to activate the corresponding function of the button icon.

For example, when the finger stays above the button icon, the time judging unit 44 records the duration of the state sampling signal of the plurality of infrared receiving tubes 310 corresponding to the position of the control point, and if the duration is greater than or equal to a preset value, A control signal is output by the control unit 42 according to the duration and the position of the manipulation point, and the function corresponding to the illustration is activated. The control signal can function as an adjustment control, for example, can be defined as an unlocking or unlocking function of the control electronic device. At the same time, the display panel 50 displays the corresponding state of the electronic device under the control of the display processing unit 43.

When the finger moves closer to or away from the display panel 50 above the button icon, the infrared processing unit 41 detects that the state sampling signal quantities of the plurality of infrared receiving tubes 310 are proportionally changed, thereby determining an identical steering point. position. The control unit 42 controls the infrared control device 100 to perform a corresponding operation according to the change and decrease of the state sampling signal amount and the corresponding control signal of the control point position, for example, can be close to the volume icon displayed on the display panel 50. Or moving away from each other to adjust the size of the output volume of the electronic device to which the infrared ray control device 100 is applied, or to adjust the channel to be listened to by the electronic device or the like according to the movement of the frequency modulation map displayed on the display panel 50. The display processing unit 43 simultaneously controls the display panel 50 to perform corresponding interface display.

In still another embodiment, in order to prevent the other fingers of the user from being reflected by the infrared receiving tube 310 during the operation, the true operation intention of the user is created. In the interference, a reflection device having a reflectance higher than the skin reflectance can be worn on the user's finger, and the receiving sensitivity of the infrared receiving tube 310 is adjusted, so that the intensity of the infrared signal reflected by the finger is insufficient to reach the receiving threshold, and the infrared receiving tube is made 310 can only receive infrared signals reflected by the reflecting device.

The infrared control device of the invention is a non-contact control device, which arranges the infrared emission tube and the infrared receiving tube to face the display panel staggered under the display panel, and utilizes the light reflection principle to make the infrared control device have the function of no touch operation. It is easy for the user to control and keeps the panel clean. In addition, the thickness of the infrared control device can be reduced, and the infrared control device can meet the design requirements of a small size.

It is to be understood by those skilled in the art that the above embodiments are only intended to illustrate the invention, and are not intended to limit the invention, as long as it is within the spirit of the invention Changes and modifications are intended to fall within the scope of the invention.

100‧‧‧Infrared control device

20‧‧‧Infrared emitting unit

21‧‧‧Infrared launch tube set

22‧‧‧Infrared illumination control circuit

30‧‧‧Infrared receiving unit

31‧‧‧Infrared receiving tube set

32‧‧‧Infrared receiving control circuit

33‧‧‧Interference suppression circuit

40‧‧‧ processor

41‧‧‧Infrared processing unit

42‧‧‧Control unit

43‧‧‧Display Processing Unit

44‧‧‧Time Judging Unit

45‧‧‧storage unit

50‧‧‧ display panel

70‧‧‧ occlusion

Claims (11)

An infrared control device comprises a plurality of infrared transmitting tubes, a plurality of infrared receiving tubes, an infrared light emitting control circuit, an infrared receiving control circuit, a processor and a display panel, and the processor controls the plurality of infrared emitting tubes to emit infrared rays through an infrared light emitting control circuit The improvement of the signal is that the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes are arranged in a staggered manner on the display panel, and the infrared receiving control circuit controls the plurality of infrared receiving tubes to receive the reflected from the infrared transmitting tube. After the infrared signal, and sampling the state of the infrared receiving tube, transmitting a state sampling signal to the processor; the processor comprises an infrared processing unit, a control unit and a display processing unit, and the infrared processing unit is based on the plurality of infrared receiving tubes The state sampling signal determines the position of the control point, the control unit outputs a corresponding control signal according to the position of the control point, and activates a corresponding function, and the display processing unit is configured to control the display panel to display the corresponding interface. The infrared control device according to claim 1, wherein: the processor controls an infrared transmitting tube to emit an infrared light signal through the infrared light emitting control circuit, and the processor further controls the periphery of the infrared transmitting tube through the infrared receiving control circuit. The four infrared receiving tubes enter the working state. The infrared control device according to claim 1, wherein: the plurality of infrared transmitting tubes and the plurality of infrared receiving tubes are numbered in a certain order, and the processor further comprises a storage unit for storing each infrared emitting The number of the tube and the infrared receiving tube and its corresponding coordinate value on the display panel, and the operation function corresponding to the coordinate value. The infrared control device according to claim 3, wherein: the infrared processing unit is configured to: the plurality of infrared receiving tubes having the strongest sampling signal according to the state of the continuous plurality of time periods; The corresponding coordinate value and its state sampled signal strength determine a center point position, which is the position of the control point. The infrared control device of claim 4, wherein: when the obstruction is above the infrared control device and changes in a position parallel to a plane of the display panel, the infrared processing unit calculates a plurality of control point positions, and Determining a motion trajectory of the occlusion according to the plurality of manipulation point positions, the control unit sends a control signal according to the motion trajectory, and controls the infrared ray control device to perform a function corresponding to the motion trajectory. The infrared control device of claim 4, wherein: when the distance of the object from the infrared control device is changed, the infrared processing unit detects a change in the state sampling signal amount of the plurality of infrared receiving tubes, and the control unit according to the The change and decrease of the state sampling signal amount and the position of the control point output corresponding control signals, and the infrared control device is controlled to perform the corresponding function. The infrared control device of claim 4, wherein the processor further comprises a time judging unit, configured to record a duration of the state sampling signal of the infrared receiving tube, when the finger stays at the display panel When the time judging unit judges that the duration thereof is greater than or equal to a preset value, the control unit outputs a control signal according to the duration and the control point position to activate the function corresponding to the icon. The infrared control device according to claim 1, wherein the infrared control device further comprises a reflecting device having a reflectance higher than a skin reflectance, the reflecting device being wearable on the user's finger and reflecting the infrared signal to the infrared Receive tube reception. The infrared control device according to claim 1, wherein the display panel is an infrared light transmissive panel capable of transmitting infrared rays. The infrared control device according to claim 1, wherein an infrared transparent protective plate capable of transmitting infrared rays is further disposed above the display panel. The infrared control device according to claim 1, wherein a light blocking plate is disposed between the infrared transmitting tube and the adjacent infrared receiving tube.