JP2017117069A - Position detecting device, image display device and image display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a position detecting device that is able to hinder degradation in detection accuracy while detecting both light non-emitting body and a light-emitting body.SOLUTION: A touch panel (position detection device) has a plurality of light receiving sensors, a plurality of illumination devices, a control device, and so on. According to an area where the position of an electronic pen (a light-emitting body) on a display surface, the control device selects a light receiving sensor used for detecting the position coordinates of the electronic pen, a light receiving sensor used for detecting the position coordinates of a finger (a light non-emitting body) of an operator, and an illuminating device to be turned on. In this case, the position coordinates of the electronic pen and the position coordinates of a finger of the operator can be detected simultaneously. Accordingly, while both the electronic pen and a finger of the operator are detected, degradation in detection accuracy can be hindered.SELECTED DRAWING: Figure 22

Description

  The present invention relates to a position detection device, an image display device, and an image display system. More specifically, the present invention relates to a position detection device that detects the position of an object, an image display device having the position detection device, and an image including the image display device. It relates to a display system.

  In recent years, an electronic information board in which a touch panel is mounted on a flat panel display such as a liquid crystal display has been used in conferences and the like.

  The touch panel detects a contact position when an electronic pen, an operator's finger, or the like touches the display area of the display.

  For example, in Patent Document 1, a light guide member, an illumination light source that is coupled to an edge of the light guide member to illuminate the inside of the light guide member, and a non-light-emitting detection target and a light-emitting detection target are guided. At least two direction detection means for detecting the traveling direction of propagating light propagating inside the light guide member generated when contacting the member, illumination light source blinking means for periodically blinking the illumination light source, and A coordinate input device is disclosed that includes detection means for detecting the position of a non-light emitting detection object during a lighting period and detecting the position of the light emission detection object during a lighting light extinction period.

  However, in the conventional position detection device that uses both the non-light emitter and the light emitter as detection targets, the detection accuracy may be lowered.

  The present invention is a position detection device that detects the positions of a non-light emitter and a light emitter in a detection region, the plurality of illumination devices arranged around the detection region and emitting illumination light to the detection region, A plurality of light receiving sensors capable of receiving illumination light and light emitted from the light emitter, and a control device for controlling lighting / extinguishing of the plurality of illumination devices and the light emitter; Depending on the non-light-emitting body or the approximate position of the light-emitting body in the detection region, the plurality of light-receiving sensors are used to detect the position of the light-receiving sensor and the light-emitting body used to detect the position of the non-light-emitting body. It is a position detection device that controls lighting / extinction of the plurality of lighting devices according to the light receiving sensor used for detecting the position of the non-light emitting body, while being divided into light receiving sensors to be used.

  According to the position detection device of the present invention, it is possible to suppress a decrease in detection accuracy while setting both a non-light emitter and a light emitter as detection targets.

It is the schematic of the electronic information board system which concerns on one Embodiment of this invention. It is an external view of an electronic information board. 3A and 3B are diagrams for explaining the electronic pen, respectively. It is a figure for demonstrating a touchscreen. It is a figure for demonstrating the light from the illumination light source which injects into a light guide member. It is a figure for demonstrating the spreading | diffusion part in a light guide member. It is a figure for demonstrating the light reflected by the spreading | diffusion part. It is a figure for demonstrating the control apparatus of a touch panel. It is FIG. (1) for demonstrating non-light-emitting body detection mode. FIG. 10A and FIG. 10B are diagrams for explaining the amount of light received by each light receiving sensor in the non-light emitter detection mode. It is FIG. (2) for demonstrating non-light-emitting body detection mode. It is a figure for demonstrating the light-emitting body detection mode. FIG. 13A and FIG. 13B are diagrams for explaining the amount of light received by each light receiving sensor in the light emitter detection mode. It is a figure for demonstrating the difference between non-light-emitting body detection mode and light-emitting body detection mode. It is a figure for demonstrating a time division system. It is a figure for demonstrating the positional relationship of an electronic pen and each light receiving sensor. It is a figure for demonstrating the example of a mapping of the group A. FIG. It is a figure for demonstrating the case where the position of an electronic pen is contained in the area | region III. It is a figure for demonstrating the case where an operator's finger | toe is added in FIG. It is a figure for demonstrating simultaneous detection of the position of an electronic pen, and the position of an operator's finger | toe. FIG. 21A is a diagram for explaining the output signal of the light receiving sensor 300a in the simultaneous detection, and FIG. 21B is a diagram for explaining the output signal of the light receiving sensor 300b in the simultaneous detection. It is a figure for demonstrating the relationship between the area | region containing the position of an electronic pen, the light reception sensor used for a detection, and the illumination light source to light. 6 is a diagram for explaining simultaneous detection when the position of the electronic pen is included in a region I. FIG. It is a figure for demonstrating simultaneous detection when the position of an electronic pen is contained in the area | region II. It is a figure for demonstrating simultaneous detection when the position of an electronic pen is contained in the area | region IV. It is a flowchart for demonstrating operation | movement of a control apparatus at the time of detecting the position of an electronic pen and the position of an operator's finger | toe.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an electronic information board system 1 as an image display system according to an embodiment.

  The electronic information board system 1 includes an electronic information board 10 as an image display device, a notebook personal computer 90 as a terminal, a network 204, and the like.

  The network 204 may be the Internet or a LAN (Local Area Network).

  The notebook computer 90 is connected to the electronic information board 10. The electronic information board 10 is connected to the network 204.

  As shown in FIG. 2 as an example, the electronic information board 10 includes a display 20, a touch panel 24 as a position detection device, a stand 40, a device storage unit 50, and the like. In this specification, an XYZ three-dimensional orthogonal coordinate system is used, and the direction orthogonal to the floor on which the electronic information board 10 is installed is defined as the Z-axis direction, and the left-right direction of the display 20 is described as the X-axis direction. The depth direction of the display 20 is set as the + Y direction.

  The display 20 has a flat panel such as a liquid crystal panel or a plasma panel. A display surface 22 on which an image is displayed is formed on the front surface of the housing of the display 20. A touch panel 24 is provided on the front surface of the housing of the display 20.

  The operator uses the dedicated electronic pen 100 or the operator's finger (hereinafter, also referred to as “finger 110”) to write characters or figures on the display surface 22 or the UI displayed on the display surface 22. (User interface) An icon can be touched.

  In the electronic pen 100, the pen tip 101 (see FIG. 3A) is transparent, and can transmit light. Further, the electronic pen 100 includes a light emitting unit 102 and can emit the pen tip 101 (see FIG. 3B).

  Further, the electronic pen 100 includes a communication unit 103 that performs bidirectional (infrared) wireless communication with the touch panel 24. When the pen tip 101 is pressed against the display surface 22, the communication unit 103 notifies the touch panel 24 to that effect. In addition, the communication unit 103 receives an instruction to turn on / off the light emitting unit 102 from the touch panel 24.

  As shown in FIG. 4 as an example, the touch panel 24 includes four light receiving sensors (300a, 300b, 300c, 300d), four lighting devices (600a, 600b, 600c, 600d), and a control device 350 (in FIG. 4). (Not shown, see FIG. 8).

  The light receiving sensor 300 a is provided at the upper left corner of the display surface 22, and the light receiving sensor 300 b is provided at the upper right corner of the display surface 22. The light receiving sensor 300 c is provided at the lower right corner of the display surface 22, and the light receiving sensor 300 d is provided at the lower left corner of the display surface 22.

  The illumination device 600a includes an illumination light source 610a and a light guide member 620a. The illumination device 600b has an illumination light source 610b and a light guide member 620b. The illumination device 600c includes an illumination light source 610c and a light guide member 620c. The illumination device 600d includes an illumination light source 610d and a light guide member 620d.

  When it is not necessary to distinguish the four lighting devices, they are collectively referred to as “lighting device 600”. Further, an illumination light source corresponding to the illumination device 600 is denoted as “illumination light source 610”, and a light guide member corresponding to the illumination device 600 is denoted as “light guide member 620”.

  The light guide member 620 is a long member, and light (diverging light) from the illumination light source 610 is incident on one end face as shown in FIG. 5 as an example. The illumination light source 610 has a plurality of infrared LEDs. Further, the side surface of the light guide member 620 is mirror-finished so that incident light is totally reflected. Therefore, the light incident on the light guide member 620 travels in the light guide member 620 along the longitudinal direction of the light guide member 620.

  In addition, as illustrated in FIG. 6 as an example, the light guide member 620 is provided with a plurality of diffusion portions 701 on a surface facing a surface from which light is emitted.

  The diffusion part 701 is formed by applying a coating material. The diffusing portion 701 can also be realized by roughening the surface properties of the side surfaces.

  When light traveling through the light guide member 620 enters the diffusion unit 701, the light is diffused. As an example, as shown in FIG. 7, when the incident angle to the light emitting surface exceeds the critical angle of total reflection, the light is emitted from the light guide member 620 to the outside. The light emitted from the light guide member 620 to the outside travels on the display surface 22. The critical angle of total reflection varies depending on the material of the light guide member 620, and is 42.2 degrees in the case of a commonly used acrylic resin. Hereinafter, in order to avoid complication, the light emitted from the light guide member 620 to the outside is also referred to as “illumination light”.

  The light guide member 620 a is provided on the + Z side of the display surface 22, and the light guide member 620 b is provided on the + X side of the display surface 22. The light guide member 620 c is provided on the −Z side of the display surface 22, and the light guide member 620 d is provided on the −X side of the display surface 22.

  The control device 350 controls turning on (ON) and turning off (OFF) of the illumination light source of each illumination device (see FIG. 8). The control device 350 obtains the position coordinates of the electronic pen 100 and the operator's finger 110 on the display surface 22 based on the outputs of the plurality of light receiving sensors (see FIG. 8). Further, the control device 350 performs wireless communication with the communication unit 103 of the electronic pen 100 to control lighting (on) and turning off (off) of the light emitting unit 102 in the electronic pen 100 (see FIG. 8).

  In the following, when the object is the operator's finger 110, it is also referred to as “non-illuminant detection mode”, and when the object is the electronic pen 100, it is also referred to as “illuminant detection mode”.

《Position coordinate detection in non-luminant detection mode》
In the non-light emitter detection mode, the control device 350 turns on each illumination light source and turns off the light emitting unit 102 in the electronic pen 100.

  When the operator's finger 110 is positioned on the display surface 22, a part of the light emitted from each lighting device is blocked by the operator's finger 110 (see FIG. 9).

  Thus, the amount of light received by each light receiving sensor changes (see FIGS. 10A and 10B).

  The control device 350 obtains the position coordinates of the operator's finger 110 on the display surface 22 using a triangulation formula based on the output of each light receiving sensor. At this time, the control device 350 may obtain the position coordinates of the operator's finger 110 using the outputs of the two light receiving sensors, or use the outputs of the three or more light receiving sensors. The position coordinates may be obtained.

  In the non-illuminant detection mode, the control device 350 keeps the light emitting unit 102 of the electronic pen 100 off even if the electronic pen 100 notifies the display surface 22 of being pressed. Therefore, even when the electronic pen 100 is present on the display surface 22 in the non-light-emitting body detection mode, the light emitted from each illumination device and directed toward the pen tip 101 of the electronic pen 100 is transmitted through the pen tip 101. To each light receiving sensor (see FIG. 11).

  That is, in the non-luminous object detection mode, even if the electronic pen 100 is present on the display surface 22, the detection result is not affected.

<Detection of position coordinates in illuminant detection mode>
In the illuminant detection mode, the control device 350 turns off each illumination light source. In addition, when there is a notification that the electronic pen 100 is pressed against the display surface 22, the control device 350 turns on the light emitting unit 102 of the electronic pen 100.

  Light emitted from the pen tip 101 of the electronic pen 100 is received by each light receiving sensor (see FIG. 12).

  Accordingly, the amount of light received by each light receiving sensor changes (see FIGS. 13A and 13B).

  The control device 350 obtains the position coordinates of the electronic pen 100 on the display surface 22 using triangulation formulas based on the outputs of the respective light receiving sensors. At this time, the control device 350 may obtain the position coordinates of the electronic pen 100 using the outputs of the two light receiving sensors, or the position coordinates of the electronic pen 100 using the outputs of the three or more light receiving sensors. You may ask.

  By the way, even if the operator's finger 110 is present on the display surface 22 in the illuminant detection mode, each illumination light source is turned off and is not detected by each light receiving sensor.

  That is, in the illuminant detection mode, even if the operator 110 exists on the display surface 22, the detection result is not affected.

  The main differences between the non-illuminant detection mode and the illuminant detection mode are shown in FIG. In the non-light emitter detection mode, each illumination light source is turned on, the light emitting unit 102 is turned off, and each light receiving sensor can detect only the operator's finger 110. In the illuminant detection mode, each illumination light source is turned off, the light emitting unit 102 is turned on, and each light receiving sensor can detect only the electronic pen 100.

  Therefore, it is conceivable to detect the position of the electronic pen 100 and the position of the operator's finger 110 in a time-sharing manner. An example of the time division method is shown in FIG. In the time division method, the position detection of the electronic pen 100 and the operator's finger 110 is performed alternately. That is, in the time division method, the position coordinates of the electronic pen 100 and the position coordinates of the operator's finger 110 cannot be detected simultaneously. In this specification, “simultaneous detection” means that the position detection of the electronic pen 100 and the position detection of the operator's finger 110 are continuously performed within a time shorter than the time division method. .

<< Simultaneous detection of position coordinates of illuminant and non-illuminant >>
Here, the simultaneous detection of the position coordinates of the electronic pen 100 and the position coordinates of the operator's finger 110 will be described.

  First, a light receiving sensor used to detect the position coordinates of the electronic pen 100 and a light receiving sensor used to detect the position coordinates of the operator's finger 110 are set.

  Here, the four light receiving sensors are composed of two light receiving sensors, and the pair A used for detecting the position coordinates of the electronic pen 100 and the remaining two light receiving sensors are used to determine the position coordinates of the operator's finger 110. It is divided into a set B used for detection.

  FIG. 16 shows the positional relationship between the electronic pen 100 and each light receiving sensor. Here, an angle formed by the light receiving sensor 300a, the light receiving sensor 300b, and the electronic pen 100 is θab, and an angle formed by the light receiving sensor 300b, the light receiving sensor 300c, and the electronic pen 100 is θbc. In addition, an angle formed between the light receiving sensor 300c, the light receiving sensor 300d, and the electronic pen 100 is θcd, and an angle formed between the light receiving sensor 300a, the light receiving sensor 300d, and the electronic pen 100 is θad.

"Selection example 1"
In this selection example 1, a set A includes two light receiving sensors having the smallest angles (θab, θbc, θcd, θad) formed between two adjacent light receiving sensors and the electronic pen 100. The remaining two light receiving sensors are set as a set B.

"Selection example 2"
In this selection example 2, two adjacent light receiving sensors having the smallest angle formed by the optical axis of the light receiving sensor and the light beam from the electronic pen 100 are set as a set A. The remaining two light receiving sensors are set as a set B.

  By the way, if the set A and the set B are obtained in advance and mapped, an appropriate light receiving sensor can be instantaneously selected according to the position of the electronic pen 100.

  FIG. 17 shows a mapping example according to selection example 1. When the position of the electronic pen 100 is included in the area I, the light receiving sensor 300c and the light receiving sensor 300d are set to the set A, and when the position of the electronic pen 100 is included in the area II, the light receiving sensor 300a and the light receiving sensor 300d are set. Set to set A. When the position of the electronic pen 100 is included in the region III, the light receiving sensor 300a and the light receiving sensor 300b are set to the set A, and when the position of the electronic pen 100 is included in the region IV, the light receiving sensor 300b and the light receiving sensor are set. Set 300c to set A.

  Therefore, when the position of the electronic pen 100 is included in the area I, the control device 350 obtains the position coordinates of the electronic pen 100 based on the outputs of the light receiving sensor 300c and the light receiving sensor 300d, and the position of the electronic pen 100 is the area. When included in II, the position coordinates of the electronic pen 100 are obtained based on the outputs of the light receiving sensor 300a and the light receiving sensor 300d.

  Further, when the position of the electronic pen 100 is included in the region III, the control device 350 obtains the position coordinates of the electronic pen 100 based on the outputs of the light receiving sensor 300a and the light receiving sensor 300b, and the position of the electronic pen 100 is the region. When included in IV, the position coordinates of the electronic pen 100 are obtained based on the outputs of the light receiving sensor 300b and the light receiving sensor 300c.

  Next, simultaneous detection of the position coordinates of the electronic pen 100 and the position coordinates of the operator's finger 110 will be described.

  Here, as an example, it is assumed that the electronic pen 100 is detected in the region III as shown in FIG. The control device 350 selects the light receiving sensor 300a and the light receiving sensor 300b, the inclination angle α of the portion corresponding to the maximum value in the output signal of the light receiving sensor 300a, and the inclination of the portion corresponding to the maximum value in the output signal of the light receiving sensor 300b. Find the angle β. Then, the control device 350 calculates the position coordinates of the electronic pen 100 using the inclination angle α, the inclination angle β, and the triangulation formula.

  Here, as an example, a case where the operator's finger 110 is added as shown in FIG. 19 will be described. In this case, the light receiving sensors of the set B are the light receiving sensor 300c and the light receiving sensor 300d.

  The control device 350 turns on the illumination light source corresponding to the light guide member other than the side sandwiched between the two light receiving sensors used to detect the position coordinates of the finger 110 of the operator. In the case of FIG. 19, the illumination light source 610a, the illumination light source 610b, and the illumination light source 610d are turned on.

  The control device 350 obtains an inclination angle γ at a position corresponding to the minimum value in the output signal of the light receiving sensor 300c and an inclination angle δ at a position corresponding to the minimum value in the output signal of the light receiving sensor 300d (see FIG. 20). Then, the control device 350 calculates the position coordinates of the operator's finger 110 using the inclination angle γ, the inclination angle δ, and the triangulation formula.

  When the position of the electronic pen 100 is included in the region III, the straight extension line connecting the light receiving sensor 300a and the electronic pen 100 and the straight extension line connecting the light receiving sensor 300b and the electronic pen 100 are always guided. Crosses member 620c. Further, since the illumination light source 610c is not turned on, the maximum value in the output signal of the light receiving sensor 300a and the maximum value in the output signal of the light receiving sensor 300b are due to light emission of the electronic pen 100.

  Further, in this case, as shown in FIG. 21A, an extra peak due to the illumination device 600a and the illumination device 600d appears in the output signal of the light receiving sensor 300a. Further, as shown in FIG. 21B, an extra peak due to the lighting device 600a and the lighting device 600b appears in the output signal of the light receiving sensor 300b. However, these extra peaks appear at small and large angles and are known and can be easily removed.

  In addition, as an illumination light source corresponding to a light guide member other than the side sandwiched between the two light receiving sensors used to detect the position coordinates of the operator's finger 110, an illumination light source 610a, an illumination light source 610b, and an illumination light source 610d Is lit.

  In this case, the straight extension line connecting the light receiving sensor 300c and the operator's finger 110 and the straight extension line connecting the light receiving sensor 300d and the operator's finger 110 are the light guide member 620a emitting the illumination light. The light guide member 620b and the light guide member 620d always intersect with each other, and do not intersect with the light guide member 620c that does not emit illumination light.

  Therefore, the operator's finger 110 always blocks a part of the illumination light, and a minimum value is generated in the output signal of the light receiving sensor 300c and the output signal of the light receiving sensor 300d. That is, by turning on the illumination light source corresponding to the light guide member other than the side sandwiched between the two light receiving sensors used to detect the position coordinate of the operator's finger 110, the position coordinate of the operator's finger 110 is turned on. Can be requested.

  When the position of the electronic pen 100 is included in the region I, the light receiving sensors used for detecting the position of the electronic pen 100 are the light receiving sensor 300c and the light receiving sensor 300d, and are used for detecting the position of the operator's finger 110. The light receiving sensors are the light receiving sensor 300a and the light receiving sensor 300b, and the illumination light sources to be turned on are the illumination light source 610b, the illumination light source 610c, and the illumination light source 610d (see FIGS. 22 and 23).

  When the position of the electronic pen 100 is included in the region II, the light receiving sensors used for detecting the position of the electronic pen 100 are the light receiving sensor 300a and the light receiving sensor 300d, and are used for detecting the position of the operator's finger 110. The light receiving sensors are the light receiving sensor 300b and the light receiving sensor 300c, and the illumination light sources to be turned on are the illumination light source 610a, the illumination light source 610c, and the illumination light source 610d (see FIGS. 22 and 24).

  When the position of the electronic pen 100 is included in the area IV, the light receiving sensors used for detecting the position of the electronic pen 100 are the light receiving sensor 300b and the light receiving sensor 300c, and are used for detecting the position of the operator's finger 110. The light receiving sensors are the light receiving sensor 300a and the light receiving sensor 300d, and the illumination light sources to be turned on are the illumination light source 610a, the illumination light source 610b, and the illumination light source 610c (see FIGS. 22 and 25).

  A process (hereinafter also referred to as “detection process”) performed by the control device 350 when detecting the position of the electronic pen 100 and the position of the operator's finger 110 will be described with reference to FIG. The flowchart of FIG. 26 corresponds to a series of processing algorithms executed by the control device 350. This detection process is performed until the power is turned off.

  In the first step S401, the position coordinates of the electronic pen 100 and the position coordinates of the operator's finger 110 are detected by a time division method.

  In the next step S403, it is determined whether or not one electronic pen 100 is detected in the light emitter detection mode in the time division method. If there is one maximum value in the output signal of the light receiving sensor, the determination here is affirmed and the process proceeds to step S405.

  In step S405, an area including the position of the electronic pen 100 is acquired.

  In the next step S407, a light receiving sensor used for detecting the position coordinates of the electronic pen 100 is set according to the acquired area.

  In the next step S409, the position coordinate of the electronic pen 100 is detected based on the set output signal of the light receiving sensor.

  In the next step S411, the illumination light source is turned on according to the light receiving sensor used for detecting the position coordinates of the operator's finger 110.

  In the next step S413, the position coordinate of the operator's finger 110 is detected based on the output signal of the light receiving sensor used for detecting the position coordinate of the operator's finger 110.

  In the next step S415, it is determined whether an additional electronic pen 100 is detected. If there are a plurality of maximum values in the output signal of the corresponding light receiving sensor, the determination here is affirmed and the processing returns to step S401. On the other hand, if there is not a plurality of local maximum values in the output signal of the corresponding light receiving sensor, the determination here is denied and the process proceeds to step S417.

  In this step S417, it is determined whether or not the additional operator's finger 110 has been detected. If there are a plurality of maximum values in the output signal of the corresponding light receiving sensor, the determination here is affirmed and the processing returns to step S401. On the other hand, if there is not a plurality of maximum values in the output signal of the corresponding light receiving sensor, the determination here is denied and the processing returns to step S405.

  If the maximum value in the output signal of the light receiving sensor is not one in step S403, the determination in step S403 is denied and the process returns to step S401.

  In this way, the control device 350 selects the light receiving sensor according to the position of the electronic pen when drawing with one electronic pen, or one electronic pen and one operator's finger. On / off control of the illumination light source according to the received light sensor is performed, and the position coordinates of the electronic pen and the operator's finger are detected simultaneously. Then, when a plurality of electronic pens or operator fingers are detected, the control device 350 switches to detection in a time-sharing method, and then uses one electronic pen or one electronic pen and one operator finger. If it becomes drawing of, it will return to simultaneous detection.

  That is, the control device 350 detects the position coordinates of the electronic pen and the position coordinates of the operator's finger while switching between detection in the time division method and simultaneous detection.

  As described above, the touch panel 24 according to the present embodiment includes the four light receiving sensors (300a, 300b, 300c, and 300d), the four lighting devices (600a, 600b, 600c, and 600d), the control device 350, and the like. doing.

  Each light receiving sensor receives illumination light from the illumination device and light emitted from the electronic pen 100.

  Further, the display surface 22 is divided into a plurality of regions, and a light receiving sensor used to detect the position of the operator's finger 110 for each region, a light receiving sensor used to detect the position of the electronic pen 100, and lighting The lighting device to be set is set in advance.

  Then, the control device 350 receives the light receiving sensor used for detecting the position coordinates of the electronic pen 100 and the light receiving used for detecting the position coordinates of the operator's finger 110 according to the region including the position of the electronic pen 100 on the display surface 22. A sensor and a lighting device to be lit are selected. In this case, the position coordinates of the electronic pen 100 and the position coordinates of the operator's finger 110 can be detected simultaneously.

  In addition, when only one electronic pen 100 is detected, the control device 350 shifts to a mode in which the position coordinates of the electronic pen 100 and the position coordinates of the operator's finger 110 are detected at the same time, and the plurality of electronic pens 100 or the plurality of electronic pens 100 are detected. When the first finger 110 is detected, the mode shifts to a mode in which the position coordinates of the electronic pen 100 and the position coordinates of the operator's finger 110 are detected in a time-sharing manner.

  In this case, it is possible to suppress a decrease in detection accuracy while setting both the operator's finger 110 (non-light emitter) and the electronic pen 100 (light emitter) as detection targets.

  And since the electronic information board 10 has the touch panel 24, the process according to an operator's request | requirement can be performed.

  Further, since the electronic information board system 1 includes the electronic information board 10, as a result, an intended presentation or an efficient conference can be performed.

  In the above-described embodiment, in consideration of the arrangement of icons for the user interface on the display surface 22, by selecting and waiting in advance a set of light receiving sensors, the electronic pen 100 and the operator's finger 110 The position and time of the contact start can be acquired more accurately.

  Further, in the above-described embodiment, by learning past input information and selecting and waiting in advance by selecting a set of light receiving sensors, the position and time at which the electronic pen 100 and the operator's finger 110 start to touch can be further increased. Can be obtained accurately.

  Moreover, although the said embodiment demonstrated the case where the light reception sensor used for the detection of the position coordinate of the electronic pen 100 was selected according to the position of the electronic pen 100 in the display surface 22, it is not limited to this. For example, when the operator's finger 110 is frequently used, a light receiving sensor used for detecting the position coordinates of the operator's finger 110 may be selected according to the position of the operator's finger 110.

  In the above embodiment, the two adjacent light receiving sensors having the smallest angle formed by the optical axis of the light receiving sensor and the light beam from the electronic pen 100 are used as the light receiving sensors used for detecting the position coordinates of the electronic pen 100. Although the case has been described, the present invention is not limited to this. For example, two adjacent light receiving sensors having the smallest angle formed by the optical axis of the light receiving sensor and the light beam from the electronic pen 100 may be used as the light receiving sensors used for detecting the position coordinates of the electronic pen 100.

  Moreover, although the said embodiment demonstrated the case where it shifted to the mode which detects the position coordinate of the electronic pen 100 and the operator's finger | toe 110 simultaneously when the one electronic pen 100 is detected, it is not restricted to this. Instead, when one finger 110 is detected, the mode may be shifted to a mode in which the position coordinates of the electronic pen 100 and the position coordinates of the operator's finger 110 are detected simultaneously.

  Moreover, although the said embodiment demonstrated the case where the electronic pen which has a light emission part was used as a light-emitting body, it is not limited to this. In short, it is only necessary to have a light emitting unit that can be turned on and off by the control device 350.

  Moreover, although the said embodiment demonstrated the case where an operator's finger | toe was used as a non-light-emitting body, it is not limited to this. For example, a pointing stick or an electronic pen that does not have a light emitting unit may be used.

  Moreover, although the said embodiment demonstrated the case where the touch panel 24 was used for the electronic information board 10, it is not limited to this. For example, the touch panel 24 may be used for a projector device or a digital signage device.

  DESCRIPTION OF SYMBOLS 1 ... Electronic information board system (image display system), 10 ... Electronic information board (image display apparatus), 20 ... Display (display means), 22 ... Display surface (detection area), 24 ... Touch panel (position detection apparatus), 40 ... Stand, 50 ... Device storage unit, 90 ... Note PC (terminal), 100 ... Electronic pen (light emitting body), 101 ... Pen tip, 102 ... Light emitting part, 103 ... Communication part, 110 ... Finger (non-light emitting body), 204 ... Network, 300a ... Light receiving sensor (a part of the plurality of light receiving sensors), 300b ... Light receiving sensor (a part of the plurality of light receiving sensors), 300c ... Light receiving sensor (a part of the plurality of light receiving sensors), 300d ... Light receiving sensor (Part of a plurality of light receiving sensors), 350 ... control device, 600 ... lighting device, 600a ... lighting device, 600b ... lighting device, 600c ... lighting device, 600d ... illumination Apparatus, 610 ... Illumination light source, 610a ... Illumination light source, 610b ... Illumination light source, 610c ... Illumination light source, 610d ... Illumination light source, 620 ... Light guide member, 620a ... Light guide member, 620b ... Light guide member, 620c ... Light guide member , 620d: a light guide member.

JP 2014-021790 A

Claims (12)

A position detection device for detecting a position of a non-light emitter and a light emitter in a detection region,
A plurality of illumination devices arranged around the detection region and emitting illumination light to the detection region;
A plurality of light receiving sensors capable of receiving the illumination light and the light emitted from the light emitter;
A controller for controlling lighting / extinguishing of the plurality of lighting devices and the light emitter,
The control device uses the plurality of light receiving sensors to detect the positions of the non-light emitters according to the non-light emitter or the approximate position of the light emitters in the detection region. A position detection device which is divided into a light receiving sensor used for detecting a position and which controls turning on / off of the plurality of lighting devices according to the light receiving sensor used for detecting the position of the non-light emitting body.   The control device selects a light receiving sensor used to detect the position of the light emitter from the plurality of light receiving sensors according to the previous position of the light emitter in the detection region, and selects the remaining light receiving sensors. The position detecting device according to claim 1, wherein the position detecting device is a light receiving sensor used for detecting a position of the non-light emitting body.   The control device selects a light receiving sensor used to detect the position of the non-light emitting body from the plurality of light receiving sensors according to the previous position of the non-light emitting body in the detection region, and the remaining light receiving The position detection device according to claim 1, wherein the sensor is a light receiving sensor used for detecting a position of the light emitter.   The control device uses, from among the plurality of light receiving sensors, two light receiving sensors having the smallest angle formed by two adjacent light receiving sensors and the light emitting body to detect the position of the light emitting body. The position detection device according to claim 2, wherein the position detection device is a light receiving sensor.   The control device detects, from among the plurality of light receiving sensors, two adjacent light receiving sensors having the smallest angle formed by the optical axis of the light receiving sensor and the light beam from the light emitting body, and detecting the position of the light emitting body. The position detection device according to claim 2, wherein the position detection device is a light receiving sensor used for the detection.   The control device turns off the lighting device provided at a position sandwiched between two light receiving sensors used to detect the position of the non-light emitting body among the plurality of lighting devices, and the remaining lighting devices The position detection device according to claim 1, wherein the position detection device is turned on.   The detection area is divided into a plurality of areas, and at least one of a light receiving sensor used to detect the position of the non-light emitting body and a light receiving sensor used to detect the position of the light emitting body is preset for each area. The position detection apparatus according to claim 1, wherein the position detection apparatus is a position detection apparatus.   The control device shifts to a mode in which the position of the non-light emitter and the position of the light emitter are simultaneously detected when one light emitter or one non-light emitter is detected. The position detection apparatus as described in any one of 1-7.   When the plurality of light emitters or the plurality of non-light emitters are detected, the control device shifts to a mode in which the position of the non-light emitter and the position of the light emitter are detected in a time division manner. The position detection device according to claim 8.   An image display apparatus provided with the position detection apparatus as described in any one of Claims 1-9. An image display device according to claim 10;
An image display apparatus system comprising: a terminal that transfers an image to the image display apparatus.   The image display system according to claim 11, wherein the image display device is one of a projector device, an electronic information board, and a digital signage device.

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