TW201349032A - An anti-optical-noise pointer positioning system - Google Patents

Abstract

The present invention provides an anti-optical-noise pointer positioning system for a display device. The said anti-optical-noise pointer positioning system comprises a host and a handheld pointing device; wherein the host further comprises a first RF module, a control unit, and an infrared light source (IR). The infrared light source is disposed at the top or bottom of the display. The portable pointing device further includes an image module, a computing unit, and a second RF module. The first RF module, the control unit, the infrared light source, the image module, the computing unit, and the second RF module form a closed control loop, which works as follows: the image module transmitting the IR information received from the infrared light source to the computing unit for computation, the computation result is then transmitted to the first RF module through the second RF module; the first RF module receiving signals from the second RF module and forwarding to the control unit; according to the signals, the control unit can be used to control the display screen of the display device and the pointer position, or through computation to control and adjust the light-emitting properties of the infrared light source so as to eliminate optical noise generation due to external light sources and reflected light, thereby achieving optical noise suppression pointer positioning function, and the purpose of the correct positioning.

Description

Anti-light noise index positioning system

The invention relates to an index positioning system, in particular to a positioning system with anti-light noise indicators to reduce the interference of optical noise.

With the popularity of somatosensory gaming systems (eg, Wii), the technical development and application of index positioning systems has become more widespread. The first figure shows a schematic diagram of a conventional indicator positioning system. As shown in the first figure, an indicator positioning system includes a host 110 and a handheld indicator device 120. The host 110 further includes a first RF module 111, a control unit 112, and an infrared light source 113. The infrared (IR) light source 113 is disposed at a display 130, and is usually placed directly above the display 130. Or in the middle directly below, and aligned with the display panel plane of the display 130. The handheld indicator device 120 further includes a filter 121, an image module 122, a computing unit 123, and a second RF module 124. The infrared light from the infrared light source 113 passes through the filter 121 and is then used by the image module 122. After the sensing is received, the image module 122 transmits the information of the received infrared ray to the computing unit 123 for calculation, and the calculation result is transmitted to the host 110 through the second RF module 124. The host 110 receives the signal from the second RF module 124 through the first RF module 111, and thereby controls the display content of the display 130, for example, the content of the screen and the location of the indicator.

However, when there are other infrared light sources or other light sources including infrared rays in the operating environment, the infrared rays received by the image module 122 include, in addition to the infrared light source 113, other light sources from the environment. Such interference will inevitably affect the calculation unit calculation The correctness of the fruit. For the interference of ambient light source noise, a common solution is to add a specific frequency flickering control to the infrared light source 113 of the host 110 in addition to the aforementioned filter 121, so that the infrared light source 113 of the host 110 emits Infrared rays have an illuminating characteristic of a specific frequency flicker. This particular frequency should be identifiable with the frequencies of other sources commonly found in the environment to distinguish it from the common sources of light in the environment. The second figure shows a schematic diagram of sensing the infrared light of the image module in the first figure. As shown in the second figure, the fluorescent lamp 201 which is common in the environment has a frequency of 60 Hz due to the relationship of the alternating current. Of course, the frequency of alternating currents around the world is not the same, as long as the design of the frequency is avoided. For example, the specific frequency of the flash can be designed to be 10 Hz to distinguish it from the infrared rays in the fluorescent lamp. In this way, the point A received by the image module 122 in the second figure is the specific frequency flashing light, and the point B is the infrared light that is not flashing at the specific frequency, and then the point A can be determined as the infrared light from the host 110. Light source 113, and point B is interference noise from other sources.

Although the above technique, in conjunction with the configuration of the filter 121, it is generally possible to block interference of a number of noises. However, the setting of the filter increases the manufacturing cost of the handheld indicator device 120. On the other hand, if the filter 121 is removed, there is often a problem of reflected light interference, as shown in the third figure. After the infrared light from the infrared light source 113 of the host 110 is reflected by an object 301, the reflected light reaches the image module 122, and is sensed and received by the image module 122, and becomes the C point sensed on the image module 122. It is worth noting that the identification method using the characteristics of the specific frequency flicker shown in the second figure does not solve the problem of reflected light in the third figure, because the reflected light at point C also has a specific frequency flicker. characteristic.

Based on the above-mentioned shortcomings of the prior art, the main object of the present invention is to provide an index positioning system with anti-light noise capability to reduce interference of optical noise.

An embodiment of the present invention provides an anti-light noise indicator positioning system, which is applicable to a display. The anti-light noise indicator positioning system includes a host and a handheld indicator device. The host further includes a first RF module. The group, a control unit, and an infrared light source (IR) are disposed above or below the display; the handheld indicator device further includes an image module, a computing unit, and a second RF module. The first RF module, the control unit, the infrared light source, the image module, the computing unit, and the second RF module form a closed control loop, and the operation mode is as follows: the image module senses the receiving from the infrared light source. The infrared information is transmitted to the computing unit for calculation, and the calculation result is transmitted to the first RF module of the host through the second RF module; the first RF module receives the signal from the second RF module and transmits the signal to the control unit. According to the signal, the control unit controls the display screen and the index position of the display on the one hand, and controls the adjustment of the light-emitting characteristics of the infrared light source through calculation to eliminate the optical noise generated by the external light source and the reflected light. The function of positioning the anti-light noise indicator is achieved, and the purpose of correct positioning is achieved.

According to the above embodiment, the calculation process of the computing unit of the handheld indicator device further includes: capturing the infrared information sensed by the image module; and determining whether the infrared information includes infrared rays blinking according to a specific frequency; If not, transmitting an IR control command to the first RF module of the host through the second RF module, the IR control command is to adjust the brightness of the infrared light source, and return to the output of the captured image module. The step of sensing the infrared information; otherwise, determining whether the infrared information is Including two or more infrared rays flickering according to a specific frequency; if yes, transmitting an IR control command to the first RF module of the host through the second RF module, the IR control command is to weaken the brightness of the infrared light source And returning to the step of capturing the infrared information sensed by the image module; otherwise, calculating the coordinates of the infrared light source of the host; and transmitting the calculation result to the host through the second RF module The first RF module returns to the step of capturing the infrared information sensed by the image module.

According to the above embodiment, the calculation process of the computing unit of the handheld indicator device further includes: capturing the infrared information sensed by the image module; and determining whether the infrared information includes infrared rays blinking according to a specific frequency; If not, transmitting an IR control command to the first RF module of the host through the second RF module, the IR control command is to adjust the brightness of the infrared light source, and return to the output of the captured image module. The step of sensing the infrared information; otherwise, determining whether the infrared information includes two or more infrared rays that are flashed according to a specific frequency; if so, calculating the infrared light source of the host according to the infrared light having the strongest brightness Coordinates; otherwise, calculating the coordinates of the infrared light source of the host; and transmitting the calculation result to the first RF module of the host through the second RF module, and returning to the sensing of the output of the captured image module The steps to the infrared information.

According to the above embodiment, the control unit of the host further includes a Pulse Width Modulation (PWM) controller that controls the adjustment of the illumination intensity of the infrared light source by using the duty ratio of the PWM pulse wave.

According to the above embodiment, the computing unit of the host is operated as follows: the first RF module receives an instruction transmitted by the second RF module from the handheld indicator device; The instruction is a standard instruction, and the control unit of the host presents the screen content and the indicator position of the display according to the coordinate instruction; otherwise, the brightness of the infrared light source is adjusted or weakened by the PWM controller according to the IR control instruction. The control mode may be a PWM mode, and the illumination intensity of the infrared light source is controlled by adjusting a duty ratio in an illumination period of the IR light source.

A more detailed and clear understanding of the objects, functions and structural features of the present invention is intended to be

The fourth figure shows a schematic structural view of an embodiment of an anti-light noise index positioning system of the present invention. As shown in the fourth figure, the anti-light noise indicator positioning system of the present invention is applicable to a display 430. The anti-light noise indicator positioning system includes a host 410 and a handheld indicator device 420. The host 410 further includes a first RF module 411, a control unit 412, and an infrared light source (IR) 413, the infrared light source is disposed on the display 430; the handheld indicator device 420 further includes an image module 421, a computing unit 422, And a second RF module 423. The first RF module 411 is configured to receive at least one instruction from the handheld indicator device 420 and pass the received command to the control unit 412 for execution by the control unit 412 in accordance with the instruction. The instruction can be a standard instruction or an IR control instruction. If it is a coordinate command, the control unit 412 will display the cursor display of the display 430; if it is an IR control command, the control unit 412 will adjust the brightness of the infrared light source 413. The infrared rays from an infrared light source 413 are sensed and received by the image module 421, and converted into n-bit (n-bit) information. The computing unit 422 is connected to the image module 421 for receiving and calculating the n-bit infrared information transmitted by the image module 421, and generating a command according to the calculation result to be sent to the second RF. Module 423. The second RF module 423 is coupled to the computing unit 422 for receiving instructions from the computing unit 422 and transmitting the instructions to the host 410 for receipt by the first RF module 411 of the host 410. In this manner, the first RF module 411, the control unit 412, the infrared light source 413, the image module 421, the calculation unit 422, and the second RF module 423 form a closed control loop. In this way, the illuminating characteristics of the infrared light source can be adjusted through the calculation and control of the loop, so as to eliminate the optical noise generated by the external light source and the reflected light, and achieve the function of locating the anti-light noise index, thereby achieving the purpose of correct positioning. .

As described above, the closed control loop determines whether the illuminating characteristic of the infrared ray source 413 is interfered by the optical noise generated by the external light source and the reflected light by calculation of the calculating unit 422 of the handheld indicator device 420, and The calculation result is sent to the control unit 412 of the host 410 in an instruction manner to perform regulation of the illuminating characteristics of the infrared ray source 413 to eliminate interference of the optical noise. According to the above embodiment, the fifth figure shows an embodiment of the calculation flow of the calculation unit 422 of the handheld indicator device 420, and further includes the following steps: Step 501 is to capture the infrared information sensed by the image module. , wherein the infrared information can be n-bit infrared information. Step 502 is to determine whether the infrared information includes infrared rays blinking according to a specific frequency; if not, execute step 503; otherwise, proceed to step 504. The infrared light that blinks at the specific frequency refers to a specific blinking frequency of the infrared light source 413 from the host 410, and is different from an infrared light source such as a fluorescent lamp or other natural light source. Step 503: transmitting an IR control command to the first RF module of the host through the second RF module, wherein the IR control command is to adjust the brightness of the infrared light source, and after performing, return to step 501 to capture The infrared information sensed by the image module. Step 504 is to determine whether the infrared information includes two or more The frequency is flashing infrared; if so, step 505 is performed; otherwise, step 506 is performed. Among them, two or more infrared rays blinking according to a specific frequency indicate that the infrared light source 413 may be received by the image module through reflection of other objects. Step 505: transmitting an IR control command to the first RF module of the host through the second RF module, wherein the IR control command is to weaken the brightness of the infrared light source, and after performing, return to step 501 to capture The infrared information sensed by the image module. Step 506 is to calculate the coordinates of the infrared light source of the host. In step 507, the calculation result is sent to the first RF module of the host through the second RF module, and after execution, the process returns to step 501 to capture the image. The infrared information that the module outputs is sensed.

It should be noted that the above calculation method is to reduce the brightness of the infrared light source by using the IR control command when the infrared light source 413 is sensed to be reflected by other objects and accepted by the image module. The effect of reflected light.

According to the embodiment of the fourth figure, the sixth figure shows another embodiment of the calculation flow of the calculation unit 422 of the handheld indicator device 420, and further includes the following steps: Step 601 is to capture the sensed output by the image module. Infrared information, where the infrared information can be n-bit infrared information. Step 602 is to determine whether the infrared information includes infrared rays blinking according to a specific frequency; if not, execute step 603; otherwise, proceed to step 604. Step 603 is to transmit an IR control command to the first RF module of the host through the second RF module, wherein the IR control command is to adjust the brightness of the infrared light source, and after execution, return to step 601 to capture The infrared information sensed by the image module. Step 604 is to determine whether the infrared information includes two or more infrared rays that blink according to a specific frequency; if yes, execute step 605; otherwise, proceed to step 606. Step 605 calculates the coordinates of the infrared light source of the host based on the blinking infrared rays of which the brightness is the strongest, and proceeds to step 607. Step 606 is to calculate the coordinates of the infrared light source of the host, and step 607 is to transmit the calculation result to the first RF module of the host through the second RF module, and then return to step 601 to capture the image. The infrared information that the module outputs is sensed.

It is worth noting that the above calculation method is based on sensing that the infrared light source 413 may be reflected by other objects and accepted by the image module, by ignoring the reflected light whose brightness is weaker than the original incident light, only the brightness is strong. The original incident light is calculated by coordinates to eliminate the influence of reflected light.

According to the embodiment of the fourth figure, the seventh figure shows an embodiment of the operation flow of the host 410, and further includes the following steps: Step 701: the first RF module receives the second RF module from the handheld indicator device. The instruction 702 is to determine whether the instruction is a target instruction; if the instruction is a standard instruction, proceed to step 703; otherwise, proceed to step 704. In step 703, the control unit of the host presents the screen content and the indicator position of the display according to the coordinate instruction. After execution, the method returns to step 701 to receive, by the first RF module, the command transmitted by the second RF module from the handheld indicator device. Step 704, according to the IR control command, the brightness of the infrared light source is adjusted or weakened. After execution, returning to step 701, the first RF module receives the command transmitted by the second RF module from the handheld indicator device. The regulation mode is not limited to a specific manner. For example, the regulation method may be a Pulse Width Modulation (PWM) method, and the adjustment is controlled by adjusting the duty ratio in the illumination period of the infrared light source. The intensity of the illumination of the infrared source. According to this embodiment, the host control unit in the present invention may further include a pulse width modulation (Pulse). A Width Modulation (PWM) controller is configured to control the illumination intensity of the infrared light source by using a duty cycle of the PWM pulse wave. Furthermore, the regulation method can also adopt incremental or decrement to adjust the luminous intensity of the infrared light source successively to increase efficiency and avoid excessive regulation.

Therefore, the anti-light noise index positioning system of the present invention can achieve the intended purpose and effect by the disclosed technology, and meets the requirements of novelty, advancement and industrial utilization of the invention patent.

The illustrations and descriptions of the present invention are merely preferred embodiments of the present invention, and are not intended to limit the implementation of the present invention, and those who are familiar with the art are subject to the changes in the spirit of the present invention. Or the modifications should be covered by the following patent application in this case.

110‧‧‧Host

111‧‧‧First RF Module

112‧‧‧Control unit

113‧‧‧Infrared source

120‧‧‧Handheld indicator device

121‧‧‧Filter

122‧‧‧Image Module

123‧‧‧Computation unit

124‧‧‧Second RF module

130‧‧‧ display

201‧‧‧ fluorescent lamp

301‧‧‧ objects

410‧‧‧Host

411‧‧‧First RF Module

412‧‧‧Control unit

413‧‧‧Infrared source

420‧‧‧Handheld indicator device

421‧‧‧Image Module

422‧‧‧Computation unit

423‧‧‧Second RF module

430‧‧‧ display

The first figure shows a schematic diagram of a conventional index positioning system; the second figure shows the schematic diagram of the image module sensing infrared rays in the first figure; the third figure shows the image module in the second figure. A schematic diagram of sensing infrared rays after removing a filter; FIG. 4 is a schematic structural view showing an embodiment of an anti-light noise index positioning system of the present invention; and FIG. 5 is a calculation of the handheld index device of the present invention. An embodiment of the calculation flow of the unit; the sixth figure shows another calculation flow of the calculation unit of the handheld indicator device of the present invention Embodiments; and the seventh figure shows an embodiment of the operation flow of the host in the present invention.

410‧‧‧Host

411‧‧‧First RF Module

412‧‧‧Control unit

413‧‧‧Infrared source

420‧‧‧Handheld indicator device

421‧‧‧Image Module

422‧‧‧Computation unit

423‧‧‧Second RF module

430‧‧‧ display

Claims (11)

An anti-light noise indicator positioning system is applicable to a display. The system comprises: a host, the host further comprises: a first RF module, a control unit, and an infrared light source (IR), wherein the infrared light source The device is disposed above or below the display; and a handheld indicator device, the handheld indicator device further includes: an image module, a computing unit, and a second RF module; wherein the first RF module and the control unit The infrared light source, the image module, the computing unit, and the second RF module form a closed control loop; the first RF module is configured to receive at least one instruction from the handheld indicator device and receive the received The instruction is transmitted to the control unit by the control unit according to the instruction; the infrared light from the infrared light source is sensed and received by the image module, and the calculation unit is connected to the image module for receiving and calculating by the image module The infrared information transmitted by the group is generated, and an instruction is generated according to the calculation result to be handed to the second RF module; the second RF module is connected to the computing unit to receive the Calculating the instruction of the unit, and transmitting the instruction to the host, being received by the first RF module of the host; thus, the illumination characteristic of the infrared light source can be adjusted through the operation and control of the closed loop to eliminate Due to the optical noise generated by the external light source and the reflected light, the function of positioning the anti-light noise indicator is achieved, and the purpose of correct positioning is achieved. For example, in the anti-light noise index positioning system described in claim 1, wherein the instruction may be a standard instruction or an IR control instruction. The anti-light noise index positioning system of claim 2, wherein if the command is a coordinate command, the control unit controls the cursor display of the display. For example, in the anti-light noise index positioning system described in claim 2, wherein the command is an IR control command, the control unit will adjust the brightness of the infrared light source. The anti-light noise index positioning system of claim 2, wherein the image module converts the infrared light received from the infrared light source into n-bit (n-bit) infrared information. For example, the anti-light noise index positioning system described in claim 2, wherein the calculation process of the calculation unit further comprises the following steps: (a) capturing the infrared information sensed by the image module, wherein The infrared information may be n-bit infrared information; (b) determining whether the infrared information includes infrared rays flickering according to a specific frequency; if not, performing step (c); otherwise, performing step (d); (c) transmitting an IR control command to the first RF module of the host through the second RF module, wherein the IR control command is to adjust the brightness of the infrared light source, after execution, and return to step (a); (d) determining whether the infrared information includes two or more infrared rays flickering according to a specific frequency; if yes, performing step (e); otherwise, performing step (f); (e) transmitting through the second RF module An IR control command to the first RF module of the host, wherein the IR control command is to weaken the brightness of the infrared light source, after execution, and return to step (a); (f) calculate the infrared light source of the host Coordinate; and (g) pass the calculation result through the second RF Transmitting a target instruction set to a host a first RF module, after execution, and returns to step (a). For example, the anti-light noise index positioning system described in claim 2, wherein the calculation process of the calculation unit further comprises the following steps: (a) capturing the infrared information sensed by the image module, wherein The infrared information may be n-bit infrared information; (b) determining whether the infrared information includes infrared rays flickering according to a specific frequency; if not, performing step (c); otherwise, performing step (d); (c) transmitting an IR control command to the first RF module of the host through the second RF module, wherein the IR control command is to adjust the brightness of the infrared light source, after execution, and return to step (a); (d) determining whether the infrared information includes two or more infrared rays flickering according to a specific frequency; if yes, performing step (e); otherwise, performing step (f); (e) according to the highest brightness flicker Infrared calculates the coordinates of the infrared light source of the host, and proceeds to step (g); (f) calculates the coordinates of the infrared light source of the host; and (g) transmits the calculation result to the host through the second RF module First RF module, After, and returns to step (a). For example, the anti-light noise index positioning system described in claim 2, wherein the operation flow of the host further comprises the following steps: (a) the first RF module receives the second RF module from the handheld indicator device. (b) determining whether the instruction is a standard instruction; if the instruction is a standard instruction, proceeding to step (c); otherwise, performing step (d); (c) presenting, by the control unit of the host, the screen content and the indicator position of the display according to the coordinate instruction, after execution, returning to step (a); and (d) adjusting or adjusting the brightness of the infrared light source according to the IR control instruction Weak, after execution, return to step (a). For example, the anti-light noise index positioning system described in claim 2, wherein the control mode is a Pulse Width Modulation (PWM) mode, which controls the duty cycle in the illumination period of the infrared light source. To control the adjustment of the luminous intensity of the infrared light source. The anti-light noise index positioning system of claim 9, wherein the control unit of the host further comprises a Pulse Width Modulation (PWM) controller to perform duty using the PWM pulse wave. It is controlled to adjust the luminous intensity of the infrared light source. For example, the anti-light noise index positioning system described in claim 10, wherein the control mode can also adopt a progressive manner to sequentially adjust the luminous intensity of the infrared light source to increase efficiency and avoid excessive regulation.