KR100654194B1 - The Remote Controller for Remote Pointing device combined with Infrared Remote Control Function - Google Patents

Abstract

The present invention, in developing an image sensor using a remote pointing device having a general infrared remote control communication function, the remote control can perform the function of the conventional IR (Infra-Red / infrared) LED remote control and at the same time remote pointing The present invention relates to a method for efficiently configuring an infrared LED light source of a remote controller to be suitable for calculation. Light of the infrared wavelength band generated through the infrared LED light source 110 of the remote control device 100 of FIG. 1 is transmitted to two types of receiving sensors 130 and 140 of the receiving end 120 of the remote pointing system. It serves as a carrier (delivery means) for delivering the. The first receiving sensor 130 is an infrared receiving sensor of a general remote control set, recognizes the state of lighting and turning off the infrared LED light source 110 provided in the remote control device, determines a threshold value, and sets a threshold value. Based on the variation of the received light energy as a reference, it converts the output value into logical values of 0 and 1 and outputs them. The second receiving sensor 140 is an image sensor, in which a small photodiode constitutes one pixel, and these pixels are arranged in a two-dimensional array so that the optical lens set 320 of FIG. 3 is formed for each pixel. It outputs a predetermined value according to the amount of light received through the light, and obtains the information of the two-dimensional image through the combination of the output values. At this time, the image information obtained from the second receiving sensor 140 is a sensor that the image (shape) of the light source is projected through the lens from the brightness of the infrared LED light source 110 of the remote controller 100 and the arrangement of the sensor is reflected Through the area and shape of the array, the relationship between the direction of movement and distance in the plane (X, Y axis) of the virtual remote pointing coordinate system relative to the image sensor and the direction of movement and distance of the forward and reverse (Z axis) Compute the trajectory of a valid remote pointing.

In order to perform this operation more efficiently, the amount of light emitted from the infrared LED light source 110 is advantageously constant, regardless of the variation of the output voltage of the battery, which is a power source generally used by the remote pointing device 100, Appearance of the image (image) also can be obtained in the same shape with respect to the change in the deviation angle in a straight line between the remote pointing device and the receiving sensor [Fig. 5], the more advantageous, in the present invention combines the general infrared remote control communication function Method of using image sensor In a remote pointing device of a remote pointing system, a method of maintaining a constant amount of light of an infrared LED light source irrespective of fluctuations in output voltage of a power source and a light source relative to 520 of FIG. 5. Method of manufacturing a remote controller of the remote control method, characterized in that to maintain a constant shape of Suggest.

IR (Infrared) LED, Remote Control, Remote Control, Remote Pointing Device, Constant Current Source

Description

The Remote Controller for Remote Pointing device combined with Infrared Remote Control Function}

Fig. 1 Overview of a remote pointing system using an image sensor with an infrared remote control communication function

Figure 2 of the image obtained in the three-dimensional coordinate system and image sensor of the remote pointing system

 Simplified Movement Trajectory

3 The relationship between the moving distance according to the distance of the remote pointing system

4 is the difference of the pointing result according to the distance of the remote pointing system

5 Departure angle of the remote pointing system

6 is a block diagram of a remote pointing system.

7 is an external view of the infrared LED light source of the remote pointing system

8 Radiation Diagram (instance) of a typical infrared LED

Fig. 9 Radiation Diagram (instance) of Infrared LED for Remote Pointing System

The present invention is to propose a remote controller for effectively controlling the remote pointing device in implementing a system that can specifically utilize the image sensor using the remote pointing system having a general infrared remote control communication function.

Conventional remote control technology using an infrared remote control has been widely used as a remote control device for electronic devices such as TV, VTR, audio. However, the conventional remote control as a remote user input / control device for information devices having an electronic display device such as a digital TV, a game machine, or a set-top box is not suitable for applying to a complicated and diversified control system and menu method. This has been. Especially in the case of digital TV, it is inconvenient to use because the remote control is complicated by repeatedly pressing the remote control button several times for setting the desired menu or control state. There has been a drawback that it cannot be configured in a variety of convenient GUI (Graphic User Interface) form like the menu system of Windows of PC.

The image sensor-enabled remote pointing device with the general infrared remote control communication function is used to accurately calculate the movement trajectory, to consider the deviation angle to increase the accuracy of the calculation, and to compensate the deviation according to the control position. There have been technical difficulties in implementation. Therefore, it is still in the research stage without being put into practical use.

Image acquisition of the infrared LED light source of the remote controller is performed for various conditions such as the sensitivity of the image sensor 140 included in the receiving module 120 of the remote pointing system [FIG. 1], the diversity of the use environment, and the user's use habit. In order to easily control and calculate the three-dimensional moving direction and the desired moving distance of the light source included in the remote controller 100 from the obtained image, it is necessary to use a precise optical lens set, an image sensor, and a complex image processing technique. Enemy Accordingly, the present invention solves the above technical difficulties and proposes a design method of a remote controller that can be easily applied. In the remote pointing system, the three-dimensional movement direction of the remote controller is detected by the following method.

In FIG. 2, when the movement of the image of the infrared LED light source 200 projected on the image sensor is represented by a coordinate system such as 240, the movement of the left / right direction of the infrared LED light source is transmitted to the image sensor as shown in 210. The image is expressed as moving left and right. In addition, the up / down direction of the infrared LED light source 200 is represented as the image of the image sensor is moved up and down, as shown in (220). In addition, the movement of the front / rear direction of the infrared LED light source 200 is represented such that the size (area) of the image captured by the image sensor is increased or decreased (widened or narrowed), as shown at 230. Therefore, the pointing system detects the movement trajectory and direction of the infrared LED light source in three-dimensional space through the amount of change in the left / right, up / down, size (area) of the infrared LED light source represented by the image sensor. .

In the remote pointing system, the three-dimensional movement distance of the remote controller including the infrared LED light source is detected by the following method.

When the movement R of the infrared LED light source 310 of the remote controller located at a distance D0 close to the image sensor as shown in FIG. 3 is obtained through the image sensor 330 through the optical lens set 320. The movement amount of the light source detected on the image sensor array of FIG. 4 400 and the movement R of the infrared LED light source 300 of the remote controller located at a distance D1 far from the image sensor The movement amount 410 of the light source sensed on the array of the image sensor when the optical lens set 320 is acquired through the image sensor 330 has a different value. At this time, in order to correct the difference between the actual movement amount of the infrared LED light source of the remote controller and the movement amount detected by the image sensor according to the distance, the effective movement distance is detected using the brightness and size (area) of the image of the acquired LED light source. The method of computation must be used. In addition, another important matter to be considered in the above calculation process is that the pointing device 500, 510, the lens set 530, and the image sensor 540 are not in line with each other as shown in FIG. 5. In the case of having a departure angle 520 without the conventional general infrared LED light source, as shown in (800) of FIG. 8, the luminance is not constant according to the departure angle 520, and images of different sizes and shapes are obtained. There are many problems in the application of the present method of calculating the moving distance using the brightness and size (area) of the image for the infrared LED light source. Therefore, even when there is a deviation angle of the top, bottom, left and right as in the apparatus of FIG. 7 so as to have the light emission characteristic as shown in (900) of FIG. It is possible to use spherical infrared LEDs that apply the method of optically scattering infrared rays into a spherical structure so that they can be projected, or attach a spherical structure to the light emitting part of the infrared LED. It is necessary. At this time, 700 is an optical guide light of the infrared band generated from the infrared LED to the spherical optical scattering structure 710 serves to induce the progress of the light generated by the infrared light source. It is also advantageous for the application of the present invention to increase the diameter r of the infrared light source by the spherical structure 710 that emits infrared radiation to the outside, wherever possible, within the range applicable in the remote controller set.

A general block diagram of a remote controller having a function of a remote controller for implementing the above function is shown in FIG. 6. Like a general remote control, the battery 600 is used as a power source, and a user receives an operation of the button 660 as an input, and displays a function 680 of the infrared LED 630 using the controller 670 at the same time. The light emission current is turned on / off 650 by a predetermined method so as to emit infrared light to perform a remote control function. In the present invention, the voltage detector 610 for checking the voltage of the power supply 600 to stop the function of the remote controller when the output voltage of the battery is lower than a specific voltage is used. In addition, the controller 670 transmits the state of the power source of the remote controller to the infrared reception sensor 130 using the control method of the conventional remote control method using the information input from the voltage detector. In addition, the battery, which is a power source commonly used by a remote controller, has a characteristic that the voltage gradually decreases due to current consumption. When using this as a power source for directly driving an infrared LED, the brightness of the infrared LED light source changes according to the output voltage of the battery. Will be. The change in brightness of the infrared LED light source causes a change in the received image of the image sensors 140 and 330 of the remote control receiver, which may cause undesirable results in the overall remote pointing operation. Irrespective of the fluctuation, the infrared current is driven by the constant current source 640 to control the brightness of the infrared LED light source during the control. In order to implement such a constant current source, a reference current / voltage source is configured as shown in (620) of FIG. 6, and then a constant current source capable of supplying a small amount of current is used to generate a constant current source using the current mirror technique. It is used to construct a constant current source that can sink a large current to drive the LED.

In addition, using the infrared LED 630 and the spherical structure 690 for infrared scattering, even if the remote controller has a departure angle such as 520 of FIG. It is configured to form the shape of the infrared light source.

Method of using image sensor with general infrared remote control communication In developing a remote controller of a remote pointing system, the constant current driving method is used instead of the voltage driving method to maintain a constant infrared LED brightness despite the voltage variation of the power supply of the remote controller. 3D pointing of the remote pointing system by scattering the shape of the infrared LED light source into a spherical shape so that the same shape of the light source can be projected onto the receiver's image sensor even when a deviation angle occurs. Relatively simple hardware devices and arithmetic techniques with minimal image processing can be applied practically.                     

Due to the development of the remote pointing system, the user can move the mouse on the PC like a GUI (Graphic User), moving away from the method of inputting commands by pressing a button on the display screen of a conventional digital TV, set-top box, VOD, etc. It can be used as a remote pointing technique for a new type of display to control and conveniently use display devices such as digital TVs, set-top boxes, and VODs.

Claims (5)

A remote controller for a remote pointing device using an image sensor having an infrared remote control communication function, Infrared light emitting unit having a spherical light emitting surface, By using the image of the light source generated by the infrared light emitter to extract the two-dimensional shift value by calculating the left / right, up / down trajectory fluctuation of the image projected on the image sensor, and move according to the control distance of the remote pointing. A remote controller for a remote pointing device, characterized by using the received light amount or the occupied area of the received light to correct the trajectory deviation. The method of claim 1, The infrared light emitting unit The optical guide is made on the light emitting surface so that the image of the light source can be projected even by the change of the angle seen by the image sensor, and the light emitting surface is provided by using a spherical structure. Remote controller for a remote pointing device, characterized in that to provide a light source image of a certain shape even by various angles to look at the infrared light source. The method of claim 1, The infrared light emitting unit A remote controller for a remote pointing device, characterized in that the brightness of the light source is kept constant even when the power is changed by driving using a constant current source provided in the remote controller.        The method of claim 3, wherein      The constant current source is a remote controller for a remote pointing device, characterized in that configured to be able to supply a small amount of current and supply it with a large amount of current by a current mirror technique.        The method of claim 1, The remote controller Further includes a voltage checker to check the power usage, The remote controller for a remote pointing device, characterized in that for stopping the operation of the remote controller in a state below a predetermined voltage by the value output through the voltage checker, and transmitting information on the voltage state of the power supply.

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