CN114070402A - Panel type optical communication device and method for transmitting information using the same - Google Patents
Panel type optical communication device and method for transmitting information using the same Download PDFInfo
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- CN114070402A CN114070402A CN202010749824.4A CN202010749824A CN114070402A CN 114070402 A CN114070402 A CN 114070402A CN 202010749824 A CN202010749824 A CN 202010749824A CN 114070402 A CN114070402 A CN 114070402A
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- 238000004891 communication Methods 0.000 title claims abstract description 95
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- 238000003384 imaging method Methods 0.000 description 9
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- 238000005096 rolling process Methods 0.000 description 5
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/502—LED transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
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Abstract
Provided are a panel type optical communication device and a method of communicating information using the same, the panel type optical communication device including: the light emitting panel comprises a plurality of light emitting areas, wherein the plurality of light emitting areas comprise a first light emitting area and a second light emitting area, and the first light emitting area comprises at least two sub-areas separated by the second light emitting area; and a control circuit for controlling the light emitting panel to convey a sequence of information, wherein the control circuit is configured to control the first light emitting area to operate to convey first information and turn off the second light emitting area for a first period of time and to control the second light emitting area to operate for a second period of time.
Description
Technical Field
The present invention relates to the field of optical communications, and in particular, to a panel-type optical communications apparatus and a method for transmitting information using the same.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art for the purposes of describing the present disclosure.
The optical communication device can transmit information through different light emitting modes, which has the advantages of long identification distance and loose requirement on visible light conditions, and the information transmitted by the optical communication device can change along with time, thereby providing large information capacity and flexible configuration capability.
An optical communication device may generally include a controller and at least one light source, and the controller may drive the light source through different driving modes to transmit different information to the outside. Fig. 1 shows an exemplary optical communication device 100 comprising three light sources (a first light source 101, a second light source 102, a third light source 103, respectively). The optical communication device 100 further comprises a controller (not shown in fig. 1) for selecting a respective driving mode for each light source depending on the information to be communicated. For example, in different driving modes, the controller may control the light emitting manner of the light source using different driving signals, so that when the optical communication apparatus 100 is photographed using the device having an imaging function, the image of the light source therein may present different appearances (e.g., different colors, patterns, brightness, etc.). By analyzing the images of the light sources in the optical communication apparatus 100, the driving patterns of the respective light sources at the moment can be analyzed, thereby analyzing the information transmitted by the optical communication apparatus 100 at this moment.
Fig. 2 shows an image of the optical communication apparatus 100 taken by the rolling shutter imaging device in the low exposure mode when the optical communication apparatus 100 is communicating information, in which the image of the first light source 101 exhibits relatively narrow stripes and the images of the second light source 102 and the third light source 103 exhibit relatively wide stripes. By analyzing the images of the light sources in the optical communication apparatus 100, the driving patterns of the respective light sources at the moment can be analyzed, thereby analyzing the information transmitted by the optical communication apparatus 100 at this moment. The optical communication device 100 may also communicate information by way of a change in the brightness (e.g., by turning the light source on or off) or a change in color, etc., of the individual light sources therein, as long as the changes are distinguishable by the human eye or a computer.
However, the above optical communication apparatus requires the use of a plurality of independent light sources physically spaced apart from each other to avoid mutual interference between the light sources, which imposes a limitation on the application of the optical communication apparatus. In the prior art, there are a large number of panel-type light emitting apparatuses in which light sources are arranged in close proximity with a small pitch (for example, arranged as an array of light sources), and it would be very advantageous if such panel-type light emitting apparatuses could be implemented as panel-type optical communication apparatuses capable of optical communication.
Disclosure of Invention
One aspect of the present invention relates to a panel type optical communication apparatus including: the light emitting panel comprises a plurality of light emitting areas, wherein the plurality of light emitting areas comprise a first light emitting area and a second light emitting area, and the first light emitting area comprises at least two sub-areas separated by the second light emitting area; and a control circuit for controlling the light emitting panel to convey a sequence of information, wherein the control circuit is configured to control the first light emitting area to operate to convey first information and turn off the second light emitting area for a first period of time and to control the second light emitting area to operate for a second period of time.
Optionally, the control circuit is configured to turn off the first light emitting area for the second period.
Optionally, the second light emitting area includes at least two sub-areas separated by the first light emitting area, and the control circuit is configured to control the second light emitting area to operate to transfer second information and close the first light emitting area during the second period, wherein the second information is the same as or different from the first information.
Optionally, wherein the control circuitry is configured to: the first light-emitting area and the second light-emitting area are respectively controlled to transmit the same information at different time intervals in the same information transmission cycle.
Optionally, wherein the control circuitry is configured to: and controlling the first light-emitting area to work in a third period of time to transfer third information and close the second light-emitting area, wherein the third information is different from the first information.
Optionally, wherein the control circuit is configured to control the first light emitting area or the second light emitting area to be enabled or operated 50 times or more per second.
Optionally, wherein during operation of the panel type optical communication device, each light emitting region of the light emitting panel has substantially the same average light intensity or light flux.
Another aspect of the present invention relates to a method of communicating information using a panel-type optical communication device, wherein the panel-type optical communication device includes a light-emitting panel that can be divided into a plurality of light-emitting areas including a first light-emitting area including at least two sub-areas separated by a second light-emitting area and a control circuit for controlling the light-emitting panel to communicate a sequence of information, the method including: controlling the first light-emitting area to work in a first period of time so as to transmit first information and close the second light-emitting area; and controlling the second light-emitting region to work in a second period.
Optionally, the second light emitting area is controlled to operate during the second period to transmit second information and close the first light emitting area, wherein the second information is the same as or different from the first information.
Optionally, wherein the first light emitting area and the second light emitting area are controlled to transmit the same information respectively at different periods within the same information transmission cycle.
Optionally, the method further comprises: and controlling the first light-emitting area to work in a third period of time to transfer third information and close the second light-emitting area, wherein the third information is different from the first information.
Optionally, wherein the first light emitting region or the second light emitting region is controlled to be activated or operated 50 times or more per second.
Optionally, wherein the relative encoding of information is between at least two sub-regions in the first light emitting region.
Another aspect of the present invention relates to a method of communicating information using a panel-type optical communication device, wherein the panel-type optical communication device includes a light-emitting panel that can be divided into a plurality of light-emitting areas including a first light-emitting area including at least two sub-areas separated by a second light-emitting area and a control circuit for controlling the light-emitting panel to communicate a sequence of information, the method including: acquiring an information transmission period of the panel type optical communication device; obtaining a duty cycle of each light emitting region of the light emitting panel; and controlling the plurality of light-emitting areas to transmit the information sequence according to the information sequence to be transmitted by the panel type optical communication device, the information transmission period of the panel type optical communication device and the work period of each light-emitting area.
Optionally, a duty cycle of each light emitting region is less than an information transmission cycle of the panel type optical communication device.
Optionally, the method further comprises: and controlling the first light-emitting area to work in order to transmit first information and close the second light-emitting area in a first period.
Optionally, the method further comprises: and controlling the second light-emitting area to work in a second period of time to transmit second information and close the first light-emitting area.
Optionally, if the first time period and the second time period are located in the same information transmission cycle, the first information and the second information are the same.
By the scheme of the invention, the common panel type light-emitting device can be realized as a panel type light-communicating device capable of carrying out light communication, and light interference among all areas of the light-emitting panel can be avoided, so that the application field and the application range of the light communication are expanded.
Drawings
Embodiments of the invention are further described below with reference to the accompanying drawings, in which:
FIG. 1 illustrates an exemplary optical communication device;
fig. 2 shows an image of an optical communication apparatus photographed by a rolling shutter imaging device in a low exposure mode;
fig. 3 illustrates a light emitting panel of a panel-type optical communication device according to an embodiment of the present invention;
FIG. 4 shows a schematic diagram of each row of LED lamps in the light emitting panel divided into one set according to one embodiment of the invention;
FIG. 5 illustrates a method of communicating information using a panel-style optical communication device according to one embodiment;
fig. 6 illustrates a method of communicating information using a panel-type optical communication device according to another embodiment;
fig. 7 illustrates an example image obtained by photographing a panel type optical communication apparatus according to an embodiment in a low exposure mode using a rolling shutter imaging device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail by embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A panel type light emitting device is a common light emitting device, and may include a plurality of light sources arranged in one plane, which together constitute a light emitting panel. The panel type light emitting device may further include a circuit board having thereon a control circuit for controlling the light emitting panel. The light source may have various forms, such as an LED lamp. In one embodiment, the projection or projection area of the lighting device (e.g., the projection or projection area of light on a wall) may also serve as a panel lighting device or light source. The panel type lighting device may include various common optical devices such as a light guide plate, a light uniformizing plate, and the like. The panel type light emitting device may have various shapes.
Fig. 3 shows a light emitting panel 300 of a panel-type optical communication device according to an embodiment of the present invention, which includes a rectangular array of a plurality of LED lamps 301. The array of LED lamps 301 shown in fig. 3 comprises 6 rows of 19 LED lamps 301, which LED lamps 301 together form a rectangular light-emitting panel. The panel type optical communication apparatus may further include a circuit board having thereon a control circuit for controlling the light emitting panel 300 to transmit a series of information, for example, a series of information to the outside in an optical communication manner through the light emitting panel 300 for a certain period of time. The control circuit and the light-emitting panel may be integrated in the same housing, but it is understood that they may be separate as long as the control of the light-emitting panel is achieved by the control circuit. In one embodiment the control circuit and the light-emitting panel may be integrated together, for example into one and the same board, one side of which serves as the control circuit and the other side as the light-emitting panel.
In one embodiment, as shown in fig. 4, each line of LED lamps 301 in the light-emitting panel 300 may be taken as a set to form a "sub-area", so that the LED lamps 301 on the light-emitting panel 300 may be divided into 6 sub-areas, which are sub-areas 310, 320, 330, 340, 350, 360, respectively.
If these sub-areas 310, 320, 330, 340, 350, 360 are controlled to simultaneously transfer information, interference may occur due to the small spacing between adjacent sub-areas (e.g., sub-area 310 and sub-area 320), thereby affecting the identification of the transferred information.
In one embodiment, the set of sub-regions 310, 330, 350, which are separated by other sub-regions 320, 340, 360, respectively, may be considered a first light emitting region and the set of sub-regions 320, 340, 360 may be considered a second light emitting region, and such that during a first time period only the first light emitting region is enabled or operative to communicate information and during a second time period only the second light emitting region is enabled or operative to communicate information. That is, when any one of the light emitting regions is transmitting information, the other light emitting region is turned off (i.e., is in a non-operating state or does not emit light) so as not to interfere with the light emitting region transmitting information. In this manner, when the first light-emitting area is activated or operated, the interference on each sub-area can be greatly reduced due to the large spacing (non-adjacency) between the sub-areas 310, 330, 350. Similarly, when the second light-emitting region is activated or operated, the interference of each sub-region can be greatly reduced. It should be noted that in the present application, the light emitting region is activated or operated, and does not mean that the corresponding light source in the light emitting region is always powered on or kept emitting light. For example, in some embodiments, a light source in a light emitting region may communicate information during operation by flashing at a high frequency and/or phase, and thus, may be off or non-emitting at certain times during activation or operation of the light emitting region.
In one embodiment, in conveying information, the first and second light emitting regions of the light emitting panel 300 may be continuously switched between such that the first and second light emitting regions are alternately activated or operated to convey a series of different information. In one embodiment, in order to avoid the flicker phenomenon perceived by human eyes, the on/off frequency of the light emitting region may be set to 50Hz or more, 60Hz or more, 80Hz or more, 100Hz or more, 150Hz or more, 300Hz or more, 500Hz or more, or 1000Hz or more. The on/off frequency may be understood as the number of times a certain light emitting area is on or active per second. For example, with the light-emitting panel 300, if the activation/deactivation frequency of both of the light-emitting regions is 50Hz, it means that both the first light-emitting region and the second light-emitting region are activated or operated 50 times per second. For example, the first light-emitting region and the second light-emitting region operate alternately, and each light-emitting region operates for 10 milliseconds at a time. If the on/off frequency of each light-emitting region is still 50Hz but 4 light-emitting regions operating in turn are included in the light-emitting panel, the time period for each light-emitting region to operate at a time may be set to 5 milliseconds. At higher on/off frequencies, the panel-type optical communication device does not perceive flickering to human eyes as a common panel-type light emitting device for illumination.
The different light emitting areas may have the same or different on/off frequencies and may also have the same or different on-time periods. In one embodiment, one or more light emitting areas in the light emitting panel may be operated or kept normally on at all times, as long as it does not interfere with other light emitting areas used to communicate information.
In one embodiment, the light intensity and/or the operating time period of each operating time of the respective light emitting regions of the light emitting panel of the panel-type optical communication device may be set such that the respective light emitting regions of the light emitting panel exhibit substantially the same average light intensity or luminous flux when the panel-type optical communication device is in operation. For example, it is possible to operate the light-emitting regions alternately and to make the light-emitting regions have the same light intensity and operating time period each time they operate, so that the entire light-emitting panel exhibits substantially the same average light intensity or light flux to the human eye, that is, exhibits a light-emitting panel having uniform brightness.
It is understood that the light emitting panel 300 shown in fig. 3 is merely used as an example, not a limitation, and that there may be a different number of light sources in the light emitting panel, and that the light sources may be arranged in a different manner or in a different shape. In one embodiment, a single strip light source may be used in place of a row of LED lights in the light panel 300. In one embodiment, a row of LED lights in the light panel 300 may be replaced with one or more light sources in combination with a light guide plate in the form of a strip.
Also, the division of the light emitting regions or sub-regions of fig. 4 is also merely an example, the light sources in the light emitting panel may be divided into the light emitting regions or sub-regions in different manners, the shapes of the respective light emitting regions may be the same or different, the number or shape of the sub-regions in each light emitting region may be the same or different, and one or more light sources may be included in each sub-region.
In one embodiment, three rows of light sources may be included in the light emitting panel, and the three rows of light sources may be divided into two light emitting regions, respectively: a first light-emitting area formed by the 1 st and 3 rd rows, and a second light-emitting area formed by the 2 nd row.
In one embodiment, nine lines of light sources may be included in the light emitting panel, and the nine lines of light sources may be divided into three light emitting areas, respectively: a first light-emitting area formed by the 1 st, 4 th and 7 th lines, a second light-emitting area formed by the 2 nd, 5 th and 8 th lines, and a third light-emitting area formed by the 3 rd, 6 th and 9 th lines; alternatively, the nine rows of light sources may be divided into two light emitting areas, respectively: a first light-emitting region defined by the 1 st, 3 rd, 5 th, 7 th, and 9 th rows, and a second light-emitting region defined by the 2 nd, 4 th, 6 th, and 8 th rows.
In one embodiment, twelve lines of light sources may be included in the light emitting panel, and the twelve lines of light sources may be divided into four light emitting areas, respectively: a first light-emitting area formed by lines 1, 5 and 9, a second light-emitting area formed by lines 2, 6 and 10, a third light-emitting area formed by lines 3, 7 and 11, and a fourth light-emitting area formed by lines 4, 8 and 12; alternatively, the twelve rows of light sources may be divided into three light emitting areas, respectively: a first light-emitting area consisting of rows 1, 4, 7, 10, a second light-emitting area consisting of rows 2, 5, 8, 11, and a third light-emitting area consisting of rows 3, 6, 9, 12.
In one embodiment, the shape of the light-emitting area of the light-emitting panel or a sub-area therein may not be a strip shape, but other shapes. For example, the light-emitting panel may be a circular or ring-shaped array of a number of LED lamps, and a sub-area of the light-emitting panel may be one ring of LED lamps.
In one embodiment, the light emitting area for communicating information comprises at least two physically separated sub-areas. In one embodiment, higher information transfer speeds may be achieved by using at least two sub-areas to simultaneously pass information out. In one embodiment, by using at least two sub-regions to simultaneously transfer information outward, relative encoding of information between different sub-regions may be achieved, which may mitigate or avoid adverse effects of different ambient light conditions on light source imaging identification, facilitating accurate identification of information, as the different sub-regions experience substantially the same ambient light conditions when transferring information.
In one embodiment, when a certain light emitting region of the light emitting panel is transmitting information, all other light emitting regions may be turned off, but only a portion of the other light emitting regions may be turned off as long as the light emitting region transmitting information is not disturbed. In one embodiment, one or more light emitting areas of the light emitting panel may be operated or kept normally on at all times, as long as it does not interfere with other light emitting areas used to communicate information.
In one embodiment, it is not necessary that all light emitting areas of the light emitting panel be configured to be capable of communicating information, i.e., one or more light emitting areas may be made available for lighting, illumination, or other functions (e.g., aiding in positioning) rather than for communicating information. For example, for a light-emitting panel consisting of three rows of light sources, if the rows 1, 3 constitute the first light-emitting area and the row 2 constitutes the second light-emitting area, the second light-emitting area may be configured, for example, not to be used for passing information out during operation. Since the second light emitting area is not used for transferring information, in one embodiment, the first light emitting area may not be turned off when the second light emitting area is operated.
In one embodiment, the panel-type optical communication device further comprises a light homogenizing plate to generate a light homogenizing effect on the light emitted by the light source. The light-equalizing plate may be any transparent or translucent material known in the art that can produce a uniform effect on the light emitted from the light source and may have a color such that the panel-type optical communication device can exhibit a particular color. By adjusting the distance between the light homogenizing plate and the light source, an appropriate distance at which a desired imaging effect or visual effect can be obtained can be determined.
In one embodiment, the light source may be implemented in different forms, such as an LED lamp, a dot matrix light source, a pixel of an electronic screen, a light guide plate, a projected or projected area of light, or the like, or combinations thereof.
In one embodiment, a corresponding control circuit may be configured for each light-emitting area or sub-area of the panel type optical communication apparatus, and each control circuit may control the corresponding light-emitting area or sub-area by a control signal. In one embodiment, an integrated control circuit may also be used to control the light emitting areas or sub-areas separately by different control signals.
Fig. 5 illustrates a method of communicating information using a panel-type optical communication device according to one embodiment. The light emitting panel in the panel type optical communication device is divided into a plurality of light emitting areas including a first light emitting area including at least two sub-areas physically separated by a second light emitting area and the second light emitting area. The control circuit in the panel type optical communication device is configured to control the light emitting panel to transmit information to the outside. The method comprises the following steps:
step 501: and controlling the first light-emitting area to work to transmit information and closing the second light-emitting area in a first period.
In one embodiment, the relative encoding of information between at least two sub-regions in the first light emitting region may be performed, for example, for representing the first information when the two sub-regions emit light in the same manner and for representing the second information when the two sub-regions emit light in different manners. Since different sub-regions are subjected to substantially the same ambient light conditions in transferring information, adverse effects of different ambient light conditions on light source imaging identification can be reduced or avoided, facilitating accurate identification of information.
Step 502: and controlling the second light-emitting region to work in the second period.
In one embodiment, the first light emitting region may be turned off when the second light emitting region is in operation. In one embodiment, the second light emitting area may not be used for communicating information during operation. In an embodiment, the second light emitting area may also be used for communicating information during operation, and the second light emitting area may comprise at least two sub-areas physically separated by the first light emitting area or other light emitting areas. The information conveyed by the second light emitting area during the second period may be the same as the information conveyed by the first light emitting area during the first period, but may also be different.
It should be noted that "isolated by a light emitting area" referred to herein may mean isolated by one or more sub-areas of the light emitting area.
In one embodiment, the first light-emitting region or the second light-emitting region may be operated 50 times or more, 60 times or more, 80 times or more, 100 times or more, 150 times or more, 300 times or more, 500 times or more, or 1000 times or more per second.
In one embodiment, an information transmission cycle, which refers to a length of a period in which each information is transmitted, may be set for the panel type optical communication apparatus, and may have a predetermined duration, for example, at least 10 msec, at least 20 msec, at least 30 msec, at least 40 msec, at least 50 msec, at least 80 msec, at least 100 msec, or the like.
In one embodiment, the information transmission period of the panel type optical communication apparatus may be equal to a time period of one operation of the light emitting region. The duration of one operation of the light emitting area is also referred to herein as the "duty cycle of the light emitting area".
In one embodiment, the information transmission period of the panel type optical communication device may be less than the time length of one operation of the light emitting region, so that a plurality of batches of information may be transferred during one operation of the light emitting region.
In one embodiment, the information transmission period of the panel type optical communication device may be longer than the time period of one operation of each light emitting region, that is, the operation period of each light emitting region. For example, the information transmission period of the panel type optical communication device may be at least 2 times, at least 4 times, at least 10 times, at least 20 times, or at least 40 times the operation period of the light emitting region. In this way, the duty cycle of the light emitting region can be reduced, and accordingly the number of times the light emitting region operates per second can be increased, so that the human eye does not perceive the flicker phenomenon.
Different light emitting areas may be configured to communicate the same information during the same information transmission period. For example, multiple switching between the first and second light emitting areas may occur within the same information transfer period, but the first and second light emitting areas may be configured to communicate the same information. Thus, in the same information transmission period, no matter which light emitting region is working at a certain time, the same information can be collected and identified by the information receiving end (such as a mobile phone). The duty cycles of the different light emitting areas may be the same or different. After one information transmission period ends, a next information transmission period may be entered, and at this time, the first light emitting area and the second light emitting area may be configured to deliver the next information, so that the optical communication device of the panel type may complete delivery of the predetermined information sequence after a plurality of information transmission periods.
In one embodiment, for the light emitting panel 300 shown in fig. 4, it may be set that the information transmission period thereof is 40 ms, and the duty cycle of the first light emitting area (including the sub-areas 310, 330, 350) is 1 ms, and the duty cycle of the second light emitting area (including the sub-areas 320, 340, 360) is also 1 ms, wherein each light emitting area transmits, for example, two bits of information at the same time when it is operated. As such, for two bits of information to be transmitted, for example, "01", the light emitting panel 300 may be configured to always transmit the information "01" within an information transmission period of 40 milliseconds, wherein, at the 1 st millisecond, the light emitting manner of the three sub-areas in the first light emitting area may be controlled based on the information "01" to transmit the information "01" outward while the second light emitting area is turned off; at the 2 nd millisecond, the light emitting manner of the three sub-areas in the second light emitting area can be controlled based on the information "01" to transmit the information "01" to the outside while closing the first light emitting area; switching to the first light emitting region for operation at the 3 rd millisecond, switching to the second light emitting region for operation at the 4 th millisecond, and so on, until the end of the 40 millisecond information transmission period for that information "01". In this way, the information collected is the same regardless of whether the information collection device collects information at any time in the information transmission cycle. The light emitting panel 300 may be used to transmit other information, such as the information "11", at the next information transmission period. Thus, with a plurality of successive information transmission cycles, a meaningful sequence (or string) of information can be sent, such as a serial number representing the light panel, or an identifier, telephone number, address, name, web address, etc.
It should be noted that each light-emitting area of the panel-type optical communication device can simultaneously transmit one or more bits of information during operation, and the number of the light-emitting areas is not limited, and this can be achieved by appropriately encoding each sub-area of each light-emitting area. In general, if there are more sub-areas in the light emitting area, more information can be transmitted simultaneously.
Fig. 6 illustrates a method of communicating information using a panel-type optical communication device according to another embodiment. The light emitting panel in the panel type optical communication device is divided into a plurality of light emitting areas including a first light emitting area including at least two sub-areas physically separated by a second light emitting area and the second light emitting area. The control circuit in the panel type optical communication device is configured to control the light emitting panel to transmit information to the outside. The method comprises the following steps:
step 601: an information transmission cycle of the panel type optical communication apparatus is obtained.
The information transmission cycle of the panel type optical communication device is a time period during which the panel type optical communication device is configured to transmit certain information. The information transmission period of the panel type optical communication apparatus may be a value preset by the system or may be a default value, but may also be a value that can be set or changed by the user. In one embodiment, the information transmission period may be set to 40 milliseconds.
Step 602: the duty cycle of each light emitting region of the light emitting panel is obtained.
The duty cycle of a light-emitting region of a light-emitting panel refers to the length of time that the light-emitting region operates at a time. The duty cycle of the light emitting region may be a value preset by the system or may be a default value, but may also be a value that can be set or changed by the user. The duty cycles of the different light emitting areas may be the same or different. In one embodiment, the duty cycle of the light emitting region may be set to 1 millisecond.
Step 603: and controlling the plurality of light-emitting areas to transmit the information sequence according to the information sequence to be transmitted by the panel type optical communication device, the information transmission period of the panel type optical communication device and the work period of each light-emitting area.
The panel type optical communication apparatus can obtain the information sequence to be transmitted by the panel type optical communication apparatus in various ways, for example, the information sequence can be stored in the panel type optical communication apparatus in advance, and can also be received from an external device (for example, a server).
In one embodiment, the control circuit is configured to control the first light emitting area to operate to communicate information and to turn off the second light emitting area for a first period of time and to control the second light emitting area to operate and to turn off the first light emitting area for a second period of time. The length of the first period or the second period may refer to a duty cycle of the corresponding light emitting region.
In one embodiment, the control circuit is configured to control the first and second light emitting areas to communicate the same information, respectively, at different periods within the same information transmission cycle.
In one embodiment, if the information transmission cycle of the panel type optical communication apparatus is 40 msec and the duty cycle of each light emitting region is 1 msec, it means that the information transmission cycle is actually divided into 40 periods of 1 msec length, one light emitting region in each period is configured to transmit information, and the next period is switched to another light emitting region to transmit the same information. In the case where the light emitting panel of the panel type optical communication device includes the first light emitting area and the second light emitting area, it means that each light emitting area operates 20 times per information transmission cycle and 500 times per second. For a light emitting area that is operated 500 times per second, the human eye does not perceive the flickering phenomenon. Meanwhile, at the information receiving end of the optical communication system, the sampling frequency of the optical information acquisition device, for example, 25Hz or 50Hz, may be set according to the information transmission period, but the sampling frequency that is too high to be technically realized, for example, 1000Hz, does not need to be set according to the duty cycle of the light emitting region.
Fig. 7 illustrates an example image obtained by photographing a panel type optical communication apparatus according to an embodiment in a low exposure mode using a rolling shutter imaging device. Nine lines of light sources may be included in the light emitting panel of the panel type optical communication device, and the nine lines of light sources may be divided into three light emitting areas, which are: a first light-emitting area formed by the 1 st, 4 th and 7 th rows, a second light-emitting area formed by the 2 nd, 5 th and 8 th rows, and a third light-emitting area formed by the 3 rd, 6 th and 9 th rows. The rolling shutter imaging device performs column-by-column scanning when photographing the panel-type optical communication apparatus. As can be seen from fig. 7, the first light-emitting area, the second light-emitting area and the third light-emitting area operate alternately at different times, and each light-emitting area operates with three sub-areas isolated from each other without interfering with each other. When the on/off frequency of each light-emitting region is relatively high, for example, 50Hz or higher, the light-emitting panel of the panel-type optical communication device appears to the human eye as a uniformly light-emitting panel and does not cause human flicker.
In one embodiment of the invention, the invention may be implemented in the form of a computer program. The computer program may be stored in various storage media (e.g., hard disk, optical disk, flash memory, etc.), which when executed by a processor, can be used to implement the methods of the present invention.
In another embodiment of the invention, the invention may be implemented in the form of an electronic device. The electronic device comprises a processor and a memory in which a computer program is stored which, when being executed by the processor, can be used for carrying out the method of the invention.
References herein to "various embodiments," "some embodiments," "one embodiment," or "an embodiment," etc., indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in various places throughout this document are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with a feature, structure, or characteristic of one or more other embodiments without limitation, as long as the combination is not logical or operational. Expressions like "according to a" or "based on a" appearing herein mean non-exclusive, i.e. "according to a" may cover "according to a only", and also "according to a and B", unless it is specifically stated that the meaning is "according to a only". The various steps described in the method flow in a certain order do not have to be performed in that order, rather the order of execution of some of the steps may be changed and some steps may be performed concurrently, as long as implementation of the scheme is not affected. Additionally, the various elements of the drawings of the present application are merely schematic illustrations and are not drawn to scale.
Having thus described several aspects of at least one embodiment of this invention, it is to be appreciated various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be within the spirit and scope of the invention. Although the present invention has been described by way of preferred embodiments, the present invention is not limited to the embodiments described herein, and various changes and modifications may be made without departing from the scope of the present invention.
Claims (18)
1. A panel-type optical communication device comprising:
the light emitting panel comprises a plurality of light emitting areas, wherein the plurality of light emitting areas comprise a first light emitting area and a second light emitting area, and the first light emitting area comprises at least two sub-areas separated by the second light emitting area; and
a control circuit for controlling the light emitting panel to convey a sequence of information, wherein the control circuit is configured to control the first light emitting area to operate to convey a first information and turn off the second light emitting area for a first period of time and to control the second light emitting area to operate for a second period of time.
2. The panel-type optical communication device according to claim 1, wherein the control circuit is configured to turn off the first light-emitting area for the second period of time.
3. The face mounted optical communication device of claim 1, wherein the second light emitting area includes at least two sub-areas separated by the first light emitting area, and wherein the control circuit is configured to control the second light emitting area to operate to communicate second information and turn off the first light emitting area during the second period, the second information being the same as or different from the first information.
4. The panel-style optical communication device of claim 1, wherein the control circuit is configured to: the first light-emitting area and the second light-emitting area are respectively controlled to transmit the same information at different time intervals in the same information transmission cycle.
5. The panel-style optical communication device of claim 1, wherein the control circuit is configured to: and controlling the first light-emitting area to work in a third period of time to transfer third information and close the second light-emitting area, wherein the third information is different from the first information.
6. The panel-type optical communication device according to claim 1, wherein the control circuit is configured to control the first light-emitting area or the second light-emitting area to be enabled or operated 50 times or more per second.
7. The panel optical communication device according to claim 1, wherein the respective light emitting areas of the light emitting panel have substantially the same average light intensity or luminous flux during operation of the panel optical communication device.
8. A method of communicating information using a panel-type optical communication device, wherein the panel-type optical communication device includes a light-emitting panel that can be divided into a plurality of light-emitting areas, wherein the plurality of light-emitting areas includes a first light-emitting area including at least two sub-areas separated by a second light-emitting area, and a control circuit for controlling the light-emitting panel to communicate a sequence of information, the method comprising:
controlling the first light-emitting area to work in a first period of time so as to transmit first information and close the second light-emitting area; and
and controlling the second light-emitting region to work in a second period.
9. The method as claimed in claim 8, wherein the second light emitting region is controlled to operate during the second period to communicate second information and to turn off the first light emitting region, the second information being the same as or different from the first information.
10. The method of claim 8, wherein the first and second light emitting areas are controlled to communicate the same information separately at different times within the same information transmission cycle.
11. The method of claim 8, further comprising:
and controlling the first light-emitting area to work in a third period of time to transfer third information and close the second light-emitting area, wherein the third information is different from the first information.
12. The method of claim 8, wherein controlling the first or second light emitting area to activate or operate is greater than or equal to 50 times per second.
13. The method of claim 8, wherein the relative encoding of information is between at least two sub-regions in the first light emitting region.
14. A method of communicating information using a panel-type optical communication device, wherein the panel-type optical communication device includes a light-emitting panel divided into a plurality of light-emitting areas, wherein the plurality of light-emitting areas includes a first light-emitting area including at least two sub-areas separated by a second light-emitting area, and a control circuit for controlling the light-emitting panel to communicate a sequence of information, the method comprising:
acquiring an information transmission period of the panel type optical communication device;
obtaining a duty cycle of each light emitting region of the light emitting panel;
and controlling the plurality of light-emitting areas to transmit the information sequence according to the information sequence to be transmitted by the panel type optical communication device, the information transmission period of the panel type optical communication device and the work period of each light-emitting area.
15. The method of claim 14, wherein the duty cycle of each light emitting area is less than the information transmission cycle of the panel-type optical communication device.
16. The method of claim 14, further comprising:
and controlling the first light-emitting area to work in order to transmit first information and close the second light-emitting area in a first period.
17. The method of claim 16, further comprising:
and controlling the second light-emitting area to work in a second period of time to transmit second information and close the first light-emitting area.
18. The method of claim 17, wherein the first information and the second information are the same if the first time period and the second time period are within the same information transmission cycle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010749824.4A CN114070402A (en) | 2020-07-30 | 2020-07-30 | Panel type optical communication device and method for transmitting information using the same |
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| CN202010749824.4A CN114070402A (en) | 2020-07-30 | 2020-07-30 | Panel type optical communication device and method for transmitting information using the same |
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| CN114070402A true CN114070402A (en) | 2022-02-18 |
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