CN114913807A - LED driving chip, address writing device, LED display device and address writing method - Google Patents
LED driving chip, address writing device, LED display device and address writing method Download PDFInfo
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- 238000005286 illumination Methods 0.000 claims abstract description 20
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- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 4
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- 238000010586 diagram Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 6
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The embodiment of the application provides a driving chip, a writing address device, an LED device and a writing address method thereof, wherein the driving chip is used for driving a light-emitting unit, the light-emitting unit comprises at least one light-emitting diode, and the driving chip comprises: the light sensing comparison module is electrically connected with the photosensitive element and is configured to detect the electrical parameter change generated by the photosensitive element being irradiated by light with a specific wavelength and generate the address information of the driving chip according to the electrical parameter change; and the address writing module is electrically connected with the light sensation comparison module and is configured to generate an address code according to the address information and store the address code. In the embodiment, a structure for realizing physical connection with the address writing device is not required to be arranged in the LED device, so that the area of a non-luminous area in the LED device is reduced, and the display or illumination effect is improved; and the address writing operation of the LED device is more convenient.
Description
Technical Field
The application relates to the technical field of semiconductors, in particular to an LED driving chip, an address writing device, an LED display device and an address writing method.
Background
For a large outdoor display screen, in order to display a specific pattern, the LED (Light Emitting Diode) at the position of a corresponding pixel point needs to be controlled to emit Light according to a set brightness, which requires that each pixel point has a corresponding address code.
In the existing LED device, a physical connection between the writing address device and the LED device is required, which inevitably requires a structure for realizing the connection with the writing address device on the LED device, which obviously increases the area of the non-light-emitting area.
Disclosure of Invention
The application provides an LED driving chip, an address writing device, an LED display device and an address writing method aiming at the defects of the existing mode, which are beneficial to reducing the area of a light emitting area of an LED device and simplifying the address writing operation of the LED device.
In a first aspect, an embodiment of the present application provides a driving chip for driving a light emitting unit, where the light emitting unit includes at least one light emitting diode, and the driving chip includes:
the light sensing comparison module is electrically connected with the photosensitive element and is configured to enable the driving chip to enter a writing address state when detecting a first specific electric signal generated by the photosensitive element under the illumination of specific wavelength;
and the address writing module is configured to judge whether the received address information is the address information of the current level, if so, generate an address code according to the address information and store the address code, and if not, not generate the address code.
Optionally, the light sensing comparison module is further configured to generate address information of the driving chip according to a second specific electrical signal when detecting that the photosensitive element is irradiated by light with a specific wavelength to generate the second specific electrical signal, and send the address information to the writing address module.
Optionally, the driving chip further includes: and the main control unit is respectively electrically connected with the light sensation comparison module and the address writing module, is configured to generate an address code of a next-stage driving chip according to the address code of the current-stage driving chip, and transmits the address code of the next-stage driving chip to the next-stage driving chip.
Optionally, the driving chip further includes: the conducting unit is electrically connected with the signal input end, the signal output end and the main control unit respectively; the main control unit is also configured to send a first control signal to the conducting unit to turn off the conducting unit when the driving chip enters a write address state, and send a second control signal to the conducting unit to turn on the conducting unit when an address code of a next-stage driving chip is generated.
Optionally, the write address module includes: the information judgment module is electrically connected with the light sensation comparison module and is configured to determine whether the address information is the address information of the current-stage driving chip or not, and if so, the address information is transmitted to the address writing module; and the address writing module is electrically connected with the information judging module, generates an address code according to the address information and stores the address code.
Optionally, the main control unit is further configured to send a set driving signal to the light emitting diode to drive the light emitting diode to emit light when the address writing is completed.
In a second aspect, an embodiment of the present application provides an LED device, which includes at least one first power line, at least one second power line, at least one data line, and a plurality of working units, where the plurality of working units are arranged in at least one row, each working unit includes the above-mentioned driving chip and light emitting unit, and the light emitting unit includes at least one light emitting diode, where the light emitting diode is electrically connected to the driving chip.
In a third aspect, an embodiment of the present application provides a writing address device, configured to write an address to an LED device, where the writing address device includes:
the address generation module is configured to generate address information of at least part of working units in the LED device in the form of electric signals according to set logic;
an electro-optical conversion module configured to convert the address information in the form of an electrical signal into address information in the form of an optical signal, the address information in the form of an optical signal comprising a plurality of optical signals of different frequencies and/or different intensities.
In a fourth aspect, an embodiment of the present application provides an addressing method for an LED device, so that each working unit in the LED device is subjected to addressing operation, where the addressing operation for each working unit includes:
when the light sensation comparison module detects that the photosensitive element generates a first specific electric signal due to the fact that the photosensitive element is irradiated by light with specific wavelength, the driving chip of the working unit enters an address writing state;
and the address writing module judges whether the received address information is the address information of the current level, if so, generates an address code according to the address information and stores the address code, otherwise, does not generate the address code.
Optionally, each work unit is subjected to an address writing operation, further comprising: when the light sensation comparison module detects that the photosensitive element is irradiated by light with a specific wavelength to generate a second specific electric signal, the address information of the driving chip is generated according to the second specific electric signal, and the address information is sent to the address writing module.
Optionally, each work unit is subjected to address writing operation, further comprising: the main control unit generates an address code of a next-level drive chip according to the address code of the current-level drive chip and transmits the address code of the next-level drive chip to the next-level drive chip.
Optionally, each work unit is subjected to an address writing operation, further comprising: when the driving chip enters a writing address state, the main control unit sends a first control signal to the conduction unit to enable the conduction unit to be disconnected, and when the main control unit generates an address code of a next-stage driving chip, a second control signal is sent to the conduction unit to enable the conduction unit to be conducted.
Optionally, each work unit is subjected to address writing operation, further comprising: and when the working unit finishes writing the address, the main control unit sends a set driving signal to the light emitting diode to drive the light emitting diode to emit light.
Optionally, the address writing method of the LED device further includes: during maintenance, only the replaced working unit is irradiated by the wavelength to be subjected to address writing operation, and the working unit which is not replaced is in a light shielding state.
The technical scheme provided by the embodiment of the application has the following beneficial technical effects:
according to the driving chip, the address writing device, the LED device and the address writing method thereof, the light sensation comparison module is used for detecting whether the photosensitive element is illuminated to generate the first specific electric signal so as to control whether the driving chip enters the address writing state, and then the address writing module writes the address, so that the address writing device does not need to be in physical contact with the LED device using the driving chip, a structure for realizing physical connection with the address writing device does not need to be arranged in the LED device, the area of a non-luminous area in the LED device is favorably reduced, and the display or illumination effect is improved; the LED device and the address writing device do not need to be in physical contact, so that the operation of realizing the physical contact of the LED device and the address writing device is not needed in the whole address writing process of the LED device, and the address writing operation of the LED device is more convenient and faster; and by judging the write address information firstly, if the write address information is not the address information of the drive chip of the current level, the address information is not transmitted to the address write module, so that the address information can be prevented from being wrongly written.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a driving chip according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another driving chip provided in the embodiment of the present application;
fig. 3 is a schematic structural diagram of another driving chip provided in the embodiment of the present application;
fig. 4 is a schematic structural diagram of another driving chip according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a specific structure of a driving chip according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an LED device according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of another LED device provided in the embodiment of the present application;
fig. 8 is a schematic structural diagram of an address writing apparatus according to an embodiment of the present disclosure;
fig. 9 is a schematic flowchart of an address writing method for an LED device according to an embodiment of the present disclosure;
fig. 10 is a schematic flowchart of another addressing method for an LED device according to an embodiment of the present disclosure;
fig. 11 is a schematic flowchart of another address writing method for an LED device according to an embodiment of the present disclosure.
Reference numerals:
1, driving a chip; 101-light sensing comparison module; 102-a write address module; 1021-information judgment module; 1022-address write module; 103-a master control unit; 104-conducting unit; an M-photosensor;
2-a light-emitting unit; 201-a first light emitting diode; 202-a second light emitting diode; 203-a third light emitting diode;
3-a first pin;
4-a second pin;
5-a third pin;
6-a fourth pin;
7-a write address device; 701-an address generation module; 702-an electro-optical conversion module.
Detailed Description
Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is unnecessary for the features of the present application shown, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The inventor of the present application considers that, in the existing LED device, in order to implement the address writing, a physical connection between the address writing device and the LED device is required, which inevitably requires a structure for implementing the connection with the address writing device to be provided on the LED device, which obviously increases the area of the non-light emitting region.
The embodiment of the application provides a driving chip, an address writing device, an LED device and a serial address writing method, and aims to solve the technical problems.
The embodiment provides a driving chip for driving a light emitting unit, the light emitting unit includes at least one light emitting diode, as shown in fig. 1, the driving chip 1 includes a light sensing comparison module 1 and a writing address module 2.
The light sensing comparison module 1 is electrically connected to the light sensor M and configured to detect a first specific electrical signal generated by the light sensor M being illuminated by light of a specific wavelength, so as to enable the driving chip 1 to enter a write address state. Specifically, the first specific electrical signal is an electrical signal whose voltage meets a certain requirement, and based on this, the driving chip 1 enters a write address state; since the photosensitive element M has a photoelectric effect, a voltage offset is generated when the photosensitive element M is subjected to specific illumination, and the first specific electrical signal is based on the voltage offset, for example, when the specific illumination meets a certain intensity requirement, the generated voltage offset is also within a certain range, that is, the light-sensing comparison module 1 can detect the first specific electrical signal whose voltage meets the requirement.
And the address writing module 2 is configured to judge whether the received address information is the address information of the current level, generate an address code according to the address information and store the address code if the received address information is the address information of the current level, and not generate the address code if the received address information is not the address information of the current level.
In the driving chip 1 provided by this embodiment, the light-sensing comparison module 101 is used to detect whether the photosensitive element M is illuminated to generate a first specific electrical signal to control whether the driving chip 1 enters the address writing state, and then the address writing module 2 writes an address, so that the address writing device does not need to be in physical contact with the LED device using the driving chip 1, and a structure for realizing physical connection with the address writing device does not need to be arranged in the LED device, which is beneficial to reducing the area of a non-light emitting area in the LED device, thereby improving the display or illumination effect; the LED device and the address writing device do not need to be in physical contact, so that the operation of realizing the physical contact of the LED device and the address writing device is not needed in the whole address writing process of the LED device, and the address writing operation of the LED device is more convenient and faster; and by judging the written address information first, if the written address information is not the address information of the drive chip 1 of the current stage, the address information is not transmitted to the address writing module, so that the address information can be prevented from being wrongly written.
Optionally, as shown in fig. 1, the driving chip 1 includes a photosensitive element M, and the photosensitive element M is a diode or a transistor. Of course, the photosensitive element M may also be a light emitting diode driven by the driving chip 1, for example, as shown in fig. 5, the photosensitive element M is a first light emitting diode 201 in the light emitting unit 2, and of course, a plurality of light emitting diodes may also be multiplexed into the photosensitive element M at the same time. The light-emitting diodes in the light-emitting unit 2 are multiplexed into the photosensitive element M, and the photosensitive element M does not need to be arranged in the driving chip 1, so that the structure of the driving chip 1 is simplified.
Alternatively, as shown in fig. 1, in the driving chip 1, the light sensing comparison module 101 is further configured to generate address information of the driving chip 1 according to a second specific electrical signal when detecting that the photosensitive element M is irradiated by light with a specific wavelength to generate the second specific electrical signal, and send the address information to the writing address module 102.
Specifically, the illumination with a specific wavelength may be light with varying intensity, the voltage bias of the photosensitive element M is smaller under low intensity illumination, and the voltage bias of the photosensitive element M is larger under higher intensity illumination, so that the second specific electrical signal detected by the light sensing comparison module 101 is an electrical signal including a high level and a low level, and is used as the address information of the driving chip 1.
In the present embodiment, the address information is generated by the photosensitive element M being subjected to specific illumination, and based on this, the LED device using the driving chip provided in the present embodiment can write the address of each driving chip 1 one by one in an illumination manner.
In a specific embodiment, as shown in fig. 5, in the driving chip 1, the writing address module 102 includes an information determining module 1021 and an address writing module 1022. The information determining module 1021 is electrically connected to the light sensing comparing module 101 and configured to determine whether the address information is the address information of the current stage driving chip 11, and if so, transmit the address information to the address writing module 1022. The address writing module 1022 is electrically connected to the information determining module 1021, and generates and stores an address code according to the address information.
The setting information determining module 1021 can determine the address information first, and if the address information is not the address information of the driver chip 1 of the current stage, the address information will not be transmitted to the address writing module 1022, so that the address information is prevented from being wrongly written.
The address writing module 1022 includes a fuse, a One Time Program (OTP), or an Electrically Erasable Read Only Memory (EEROM). The Fuse and the OTP still can retain the stored information after the EEROM is powered off, that is, after the address writing is completed, the address code will continuously exist in the address writing module 1022, so that in the process of displaying or illuminating, the address code is used to determine whether the data information received by the driver chip 1 is the data information of the driver chip 1 of the current level, so that each driver chip 1 drives the light-emitting unit 2 to emit light according to the respective data information.
Taking the address writing module 1022 including a fuse as an example for explanation, as shown in fig. 3, specifically, the writing address module 102 includes a plurality of fuses, the blowing situations of the plurality of fuses are different when the writing address information is different, and the blowing situations of the plurality of fuses represent address codes. For example, a certain LED display device includes 1024 pixels, in order to represent an address code by the blowing condition of a fuse, each address writing module 102 should include at least 10 fuses, each fuse is blown or not blown and corresponds to 0 or 1, respectively, that is, the blowing condition of the 10 fuses can be represented by a 10-bit binary number, so that different blowing conditions of multiple fuses in the address writing module 1022 in each driver chip 1 can be achieved, that is, writing of the address code of each driver chip 1 is achieved, and the address is also stored by the fuses.
Optionally, as shown in fig. 2, the driving chip 1 provided in this embodiment further includes a main control unit 103, where the main control unit 103 is electrically connected to the light sensing comparison module 101 and the address writing module 102, respectively, and is configured to generate an address code of the next-stage driving chip 1 according to the address code of the current-stage driving chip 1, and transmit the address code of the next-stage driving chip 1 to the next-stage driving chip.
In this embodiment, the main control unit 103 in the driver chip 1 can generate address information of the driver chip 1 of the next stage, based on this, the LED device using the driver chip provided in this embodiment can write an address to the first driver chip 1 in each row in an illumination manner, and the driver chip 1 completes address writing in each row in a serial address writing mode, which can simplify the operation at the address writing device end.
Further, as shown in fig. 3, the driving chip 1 in this embodiment further includes at least one conducting unit 104, where the conducting unit 104 is electrically connected to the signal input terminal DIN, the signal output terminal DOUT, and the main control unit 103, respectively; the main control unit 103 is further configured to send a first control signal to the turn-on unit 104 to turn off the turn-on unit 104 when the driving chip 1 enters the write address state, and send a second control signal to the turn-on unit 104 to turn on the turn-on unit 104 when the address code of the next stage driving chip 1 is generated.
Specifically, as shown in fig. 3, in the driving chip 1 provided in this embodiment, the conducting unit 104 includes a transistor, a gate of the transistor is electrically connected to the main control unit 103, and a source and a drain of the transistor are electrically connected to the signal input terminal DIN and the signal output terminal DOUT, respectively; or the turn-on unit 104 includes resistors electrically connected to the main control unit 103, the signal input terminal DIN, and the signal output terminal DOUT, respectively. When the conducting unit 104 includes a resistor, the resistor may be a voltage dependent resistor, that is, the resistance of the resistor is controlled by the voltage across the resistor, when the resistor is in a high-resistance state, the conducting unit 104 may be considered to be turned off, and when the resistor is in a low-resistance state, the conducting unit 104 may be considered to be turned on.
In this embodiment, due to the arrangement of the conducting unit 104, the conducting unit 104 is in the off state in the address writing process by controlling the working state of the conducting unit 104, so that the address is ensured to be written normally, and after the address is written, the conducting unit 104 is in the on state, so that other devices in the driving chip 1 can be protected, and the driving chip 1 is prevented from being burned out.
Specifically, as shown in fig. 4, the driving chip 1 provided by the present embodiment further includes a first power terminal VDD which inputs a high-level signal and a second power terminal GND which inputs a ground signal during light emission in one embodiment, wherein the signal input terminal DIN inputs data information.
Optionally, as shown in fig. 5, in the driving chip 1 provided in this embodiment, the main control unit 103 is further configured to: and sending a set driving signal to the light emitting diode to drive the light emitting diode to emit light when the address writing is completed.
Specifically, as shown in fig. 5, the main control unit 103 can control at least one light emitting diode to emit light in a specific form after the address is written, for example, control a green light emitting diode to emit light with a gray scale value of 100 after the address is written, so as to remind an address writing operator that the driver chip 1 completes the address writing, so that the address writing operator can know that the current address writing operation of the driver chip 1 is performed and prevent the address writing from being repeated.
Specifically, as shown in fig. 5, the signal output terminal OUT includes a plurality of signal channels, for example, a red light emitting signal channel OUT-1 electrically connected to the main control unit 103 and the first light emitting diode 201, a green light emitting signal channel OUT-2 electrically connected to the main control unit 103 and the second light emitting diode 202, a blue light emitting signal channel OUT-3 electrically connected to the main control unit 103 and the third light emitting diode 203, a first signal channel OUT-4 electrically connected to the light sensing comparison module 101 and the one or more light emitting diodes, and a second signal channel OUT-5 electrically connected to the conduction unit 104 and the signal input terminal DIN of the next-stage driving chip.
Based on the same inventive concept, the present application further provides an LED device, as shown in fig. 6 and 7, the LED device includes at least one first power line, at least one second power line, at least one data line, and a plurality of working units, the plurality of working units are arranged in at least one row, each working unit includes the driving chip 1 in the above embodiments and a light emitting unit 2 electrically connected to the driving chip 1, and the light emitting unit 2 includes at least one light emitting diode. The LED manufacturing provided in this embodiment includes the working units in the above embodiments, and has the beneficial effects of the driving chip 1 in the above embodiments, which are not described herein again.
It should be noted that although only one row of working units is shown in each of fig. 6 and 7, in practical applications, for example, LED display devices, usually include a plurality of rows of working units.
Specifically, the operating unit in the LED device shown in fig. 6 further includes:
the first pin 3 is electrically connected with the signal input end 103 in the driving chip 1, and the first pins 3 of the working units in the same row are electrically connected with the same data line Ldata;
the second pins 4 are electrically connected with the first power end 104 of the driving chip 1, and the second pins 4 of the working units in the same row are electrically connected with the same first power line LVDD;
the third pin 5 is electrically connected to the second power source terminal 105 of the driver chip 1, and the third pins 5 of the working units in the same row are electrically connected to the same second power source line LGND.
Specifically, the operating unit in the LED device shown in fig. 7 further includes:
the first pin 3 is electrically connected with the signal input end 103 in the driving chip 1, and the first pins 3 of the working units in the same row are electrically connected with the same data line Ldata;
the second pins 4 are electrically connected with the first power end 104 of the driving chip 1, and the second pins 4 of the working units in the same row are electrically connected with the same first power line LVDD;
a third pin 5 electrically connected to the second power source terminal 105 of the driver chip 1, and the third pins 5 of the working units in the same row are electrically connected to the same second power source line LGND;
and the fourth pin 6 is electrically connected with the signal output end DOUT of the driving chip 1, and is electrically connected with the fourth pin 6 of the next-stage working unit in the same row.
The pins are used for realizing the electric connection of the working units and the signal lines, so that after the completion of address writing, the driving chip 1 drives the corresponding light-emitting units 2 to emit light under the control of the master control chip in the working process.
Specifically, as shown in fig. 6 and 7, the LED device provided in the present embodiment is an LED display device or an LED lighting device. For example, the LED display device is an outdoor display screen or a show window advertisement screen, and the LED lighting device is an LED landscape lighting device.
Based on the same inventive concept, an embodiment of the present application further provides a writing address device, configured to write an address to an LED device, as shown in fig. 8, where the writing address device 7 includes:
the address generating module 701 is configured to generate address information of at least part of the working units in the LED device in the form of electrical signals according to a set rule.
An electrical-to-optical conversion module 702 configured to convert address information in the form of electrical signals into address information in the form of optical signals, the address information in the form of optical signals comprising a plurality of optical signals of different frequencies and/or different intensities.
The address writing device provided by the embodiment is additionally provided with the electro-optical conversion module on the basis of the original address writing device, and can convert address information in an electric signal form into address writing information in an optical signal form, so that address writing into the LED device can be completed under the condition that the LED device has no logistics basis, the LED device does not need to be provided with a structure for realizing physical connection with the address writing device, the area of a non-luminous area in the LED device is favorably reduced, and the display or illumination effect is improved.
Based on the same inventive concept, an embodiment of the present application further provides an addressing method for an LED device, so that each working unit in the LED device in the foregoing embodiment is subjected to addressing operation one by one, where as shown in fig. 9 and in conjunction with fig. 1 to 7, the addressing operation performed on each working unit includes:
s101: when the photo-sensing comparison module 101 detects that the photosensitive element M generates a first specific electrical signal due to the illumination of the specific wavelength, the driving chip 1 of the working unit enters a write address state. This step is mainly to provide electrical energy to the LED device so that the driver chip 1 can perform the subsequent steps.
S102: the address writing module 102 determines whether the received address information is the address information of the current level, generates an address code according to the address information and stores the address code if the received address information is the address information of the current level, and does not generate the address code if the received address information is not the address information of the current level. Specifically, in one embodiment, the wavelength of the specific light received by a certain operating unit is unchanged, but the intensity of the specific light is changed, the light is a first intensity (duration t 0)/a first intensity duration t 0)/a second intensity (duration t 0)/a first intensity (duration t0), the bias voltage generated by the photosensitive element M should be a first bias voltage (duration t 0)/a first bias voltage (duration t 0)/a second bias voltage (duration t 0)/a first bias voltage (duration t0), and the voltage signal generated after processing the bias voltage is the address information.
In the address writing method provided by this embodiment, the light-sensing comparison module 101 is used to detect whether the photosensitive element M is illuminated to generate a first specific electrical signal to control whether the driving chip 1 enters the address writing state, and then the address writing module 2 writes an address, so that the address writing device does not need to be in physical contact with the LED device using the driving chip, and a structure for realizing physical connection with the address writing device does not need to be arranged in the LED device, which is beneficial to reducing the area of a non-light emitting area in the LED device, thereby improving the display or illumination effect; the LED device and the address writing device do not need to be in physical contact, so that the operation of realizing the physical contact of the LED device and the address writing device is not needed in the whole address writing process of the LED device, and the address writing operation of the LED device is more convenient and faster; and by judging the write address information firstly, if the write address information is not the address information of the drive chip of the current level, the address information is not transmitted to the address write module, so that the address information can be prevented from being wrongly written.
In an alternative embodiment, the light sensing comparing module 101 generates address information of the driving chip according to a second specific electrical signal when detecting that the photosensitive element M is irradiated by light with a specific wavelength to generate the second specific electrical signal, and sends the address information to the writing address module 102. That is, the address information of each working unit is written into the corresponding driving chip 1 by irradiating the photosensitive element M with light of a specific wavelength emitted by the writing address device. Based on this, as shown in fig. 10 and in conjunction with fig. 1 to fig. 7, in the address writing method provided in this embodiment, each working unit is subjected to address writing operation, which includes:
s201: when the photo-sensing comparison module 101 detects that the photosensitive element M generates a first specific electrical signal due to the illumination of the specific wavelength, the driving chip 1 of the working unit enters a write address state.
S202: when detecting that the photosensitive element M is illuminated by light with a specific wavelength to generate a second specific electrical signal, the light sensing comparison module 101 generates address information of the driving chip 1 according to the second specific electrical signal, and sends the address information to the address writing module 102.
S203: the address writing module 102 determines whether the received address information is the current level address information, generates an address code according to the address information and stores the address code if the received address information is the current level address information, and does not generate the address code if the received address information is not the current level address information.
In another optional embodiment, the main control unit generates an address code of the next-stage driver chip 1 according to the address code of the present-stage driver chip 1, and transmits the address code of the next-stage driver chip 1 to the next-stage driver chip 1. That is, except that the address information of the first working unit in each row is written into the driving chip 1 by the light sensor M with a specific wavelength emitted by the address writing device, the address information of the other working units in each row is generated by the driving chip 1 of the previous working unit and transmitted to the driving chip 1, and the driving chip 1 writes an address according to the address information and generates the address information of the next working unit until the address writing of the row is completed, that is, serial address writing is realized. Based on this, in the address writing method provided in this embodiment, as shown in fig. 11 and in conjunction with fig. 1 to fig. 7, each working unit is subjected to an address writing operation, which includes:
s301: when the photo-sensing comparison module 101 detects that the photosensitive element M generates a first specific electrical signal due to the illumination of the specific wavelength, the driving chip 1 of the working unit enters a write address state.
S302: the address writing module 102 receives address information sent by the previous-stage driver chip 1, and determines whether the received address information is the address information of the current stage, if so, generates an address code according to the address information and stores the address code, otherwise, does not generate the address code.
S303: the main control unit generates an address code of the next-level driving chip 1 according to the address code of the current-level driving chip 1, and transmits the address code of the next-level driving chip to the next-level driving chip.
Specifically, the address writing method provided in this embodiment, that is, the serial address writing method, further includes: when the driver chip 1 enters the address writing state, the main control unit 103 sends a first control signal to the conducting unit 104 to turn off the conducting unit 104, and sends a second control signal to the conducting unit 104 to turn on the conducting unit 104 when the main control unit generates an address code of the next-stage driver chip.
In this embodiment, due to the arrangement of the conducting unit 104, the conducting unit 104 is in the off state in the address writing process by controlling the working state of the conducting unit 104, so that the address is ensured to be normally written, and after the address is written, the conducting unit 104 is in the on state, so that other devices in the driving chip can be protected, and the driving chip is prevented from being burned out.
Optionally, the operation of writing address to each working unit further includes sending a set driving signal to the light emitting unit 2 to drive at least one light emitting diode to emit light with a set brightness when the working unit completes writing address. In the embodiment, at least one light emitting diode is controlled to emit light in a specific form after the address writing is completed, for example, a green light emitting diode is controlled to emit light with a gray value of 100 after the address writing is completed, so that an address writing operator can be reminded of completing the address writing of the driving chip 1, and the address writing operator can know that the current address writing of the driving chip 1 is performed and can prevent the address from being repeated.
Optionally, the address writing method provided in this embodiment further includes: in the maintenance process, only the replaced working unit is irradiated by specific light, and the working unit which is not replaced is in a light-shielding state. Therefore, the working units which are not replaced (have no fault) can be prevented from being influenced by specific illumination, and only the replaced units are illuminated and addressed, so that the maintenance process is more convenient.
By applying the embodiment of the application, at least the following beneficial effects can be realized:
according to the driving chip, the address writing device, the LED device and the address writing method thereof, the light sensation comparison module is used for detecting whether the photosensitive element is illuminated to generate the first specific electric signal so as to control whether the driving chip enters the address writing state, and then the address writing module writes the address, so that the address writing device does not need to be in physical contact with the LED device using the driving chip, a structure for realizing physical connection with the address writing device does not need to be arranged in the LED device, the area of a non-luminous area in the LED device is favorably reduced, and the display or illumination effect is improved; the LED device and the address writing device do not need to be in physical contact, so that the operation of realizing the physical contact of the LED device and the address writing device is not needed in the whole address writing process of the LED device, and the address writing operation of the LED device is more convenient and faster; and by judging the write address information firstly, if the write address information is not the address information of the drive chip of the current level, the address information is not transmitted to the address write module, so that the address information can be prevented from being wrongly written.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (14)
1. A driver chip for driving a light emitting unit, the light emitting unit including at least one light emitting diode, the driver chip comprising:
the light sensation comparison module is electrically connected with the photosensitive element and is configured to enable the driving chip to enter an address writing state when detecting a first specific electric signal generated by the photosensitive element under the illumination of specific wavelength;
and the address writing module is configured to judge whether the received address information is the address information of the current level, if so, generate an address code according to the address information and store the address code, and otherwise, not generate the address code.
2. The driver chip of claim 1,
the light sensation comparison module is also configured to generate address information of the driving chip according to a second specific electric signal when detecting that the photosensitive element is irradiated by light with a specific wavelength to generate the second specific electric signal, and send the address information to the address writing module.
3. The driver chip of claim 1, further comprising:
and the main control unit is respectively electrically connected with the light sensation comparison module and the address writing module, is configured to generate an address code of a next-stage driving chip according to the address code of the current-stage driving chip, and transmits the address code of the next-stage driving chip to the next-stage driving chip.
4. The driver chip of claim 3, further comprising:
the conduction unit is electrically connected with the signal input end, the signal output end and the main control unit respectively;
the main control unit is also configured to send a first control signal to the conducting unit to turn off the conducting unit when the driving chip enters a write address state, and send a second control signal to the conducting unit to turn on the conducting unit when an address code of a next-stage driving chip is generated.
5. The driver chip of any of claims 1-4, wherein the write address module comprises:
the information judgment module is electrically connected with the light sensation comparison module and is configured to determine whether the address information is the address information of the current-stage driving chip or not, and if so, the address information is transmitted to the address writing module;
and the address writing module is electrically connected with the information judging module, generates an address code according to the address information and stores the address code.
6. The driving chip according to any one of claims 1 to 4, wherein the main control unit is further configured to send a set driving signal to the light emitting diode to drive the light emitting diode to emit light when the writing address is completed.
7. An LED device comprising at least one first power line, at least one second power line, at least one data line, and a plurality of operation units arranged in at least one row, each of the operation units comprising:
the driver chip of any one of claims 1-6;
and the light-emitting unit comprises at least one light-emitting diode, and the light-emitting diode is electrically connected with the driving chip.
8. A write address device for writing address to an LED device, comprising:
the address generation module is configured to generate address information of at least part of working units in the LED device in the form of electric signals according to set logic;
an electro-optical conversion module configured to convert the address information in the form of an electrical signal into address information in the form of an optical signal, the address information in the form of an optical signal comprising a plurality of optical signals of different frequencies and/or different intensities.
9. An addressing method for an LED device, wherein the LED device of claim 7 is addressed to each working unit, and wherein the addressing method for each working unit comprises:
when the light sensation comparison module detects that the photosensitive element generates a first specific electric signal due to the fact that the photosensitive element is irradiated by light with specific wavelength, the driving chip of the working unit enters an address writing state;
and the address writing module judges whether the received address information is the address information of the current level, if so, generates an address code according to the address information and stores the address code, otherwise, does not generate the address code.
10. The LED device addressing method of claim 9, wherein each of the plurality of operating units is addressed, further comprising:
when the light sense comparison module detects that the photosensitive element is irradiated by light with a specific wavelength to generate a second specific electric signal, the address information of the driving chip is generated according to the second specific electric signal, and the address information is sent to the address writing module.
11. The LED device addressing method of claim 9, wherein each of the plurality of operating units is addressed, further comprising:
the main control unit generates an address code of a next-level driving chip according to the address code of the current-level driving chip and transmits the address code of the next-level driving chip to the next-level driving chip.
12. The LED device addressing method of claim 11, wherein each of the work units is addressed, further comprising:
when the driving chip enters a writing address state, the main control unit sends a first control signal to the conduction unit to enable the conduction unit to be disconnected, and when the main control unit generates an address code of a next-stage driving chip, a second control signal is sent to the conduction unit to enable the conduction unit to be conducted.
13. The LED device addressing method according to any of claims 9-12, wherein each working unit is addressed, further comprising:
and when the working unit finishes writing the address, the main control unit sends a set driving signal to the light emitting diode to drive the light emitting diode to emit light.
14. The LED device addressing method according to any of claims 9-12, further comprising:
during maintenance, only the replaced working unit is irradiated by the wavelength to be subjected to address writing operation, and the working unit which is not replaced is in a light shielding state.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141202A (en) * | 2010-01-29 | 2011-08-03 | 深圳市长运通集成电路设计有限公司 | LED light emitting device |
| CN105472830A (en) * | 2014-09-04 | 2016-04-06 | 矽诚科技股份有限公司 | LED lamp, lamp string and system having recordable function |
| CN107402751A (en) * | 2017-05-23 | 2017-11-28 | 博为科技有限公司 | One kind is based on linux system NAND FLASH master slice burning mirror image implementing methods |
| CN109002316A (en) * | 2017-05-31 | 2018-12-14 | 矽诚科技股份有限公司 | The light emitting diode and its system and imprinting address approach of reception non-contact type signal |
| CN109739517A (en) * | 2018-12-19 | 2019-05-10 | 努比亚技术有限公司 | Printed circuit board, terminal, firmware burning method and readable storage medium storing program for executing |
| CN110572911A (en) * | 2019-09-26 | 2019-12-13 | 深圳市明微电子股份有限公司 | Address coding method, address coding system and illumination system of cascade equipment |
| CN209912465U (en) * | 2019-06-28 | 2020-01-07 | 上海雷舞电子科技有限公司 | Flexible display device |
| CN110708793A (en) * | 2019-09-26 | 2020-01-17 | 深圳市明微电子股份有限公司 | Cascade control method of cascade equipment, cascade equipment and illumination system |
| CN110868775A (en) * | 2018-08-08 | 2020-03-06 | 矽诚科技股份有限公司 | Light emitting diode lamp, system and address burning method using radio frequency identification signal |
| WO2020187616A1 (en) * | 2019-03-18 | 2020-09-24 | Tridonic Gmbh & Co Kg | Address allocation and configuration of components of a lighting system using light signals |
| CN112074048A (en) * | 2020-09-16 | 2020-12-11 | 深圳市芯宇昊科技有限公司 | Power line control online addressing method and system without address line |
-
2021
- 2021-01-29 CN CN202110129496.2A patent/CN114913807B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141202A (en) * | 2010-01-29 | 2011-08-03 | 深圳市长运通集成电路设计有限公司 | LED light emitting device |
| CN105472830A (en) * | 2014-09-04 | 2016-04-06 | 矽诚科技股份有限公司 | LED lamp, lamp string and system having recordable function |
| CN107402751A (en) * | 2017-05-23 | 2017-11-28 | 博为科技有限公司 | One kind is based on linux system NAND FLASH master slice burning mirror image implementing methods |
| CN109002316A (en) * | 2017-05-31 | 2018-12-14 | 矽诚科技股份有限公司 | The light emitting diode and its system and imprinting address approach of reception non-contact type signal |
| CN110868775A (en) * | 2018-08-08 | 2020-03-06 | 矽诚科技股份有限公司 | Light emitting diode lamp, system and address burning method using radio frequency identification signal |
| CN109739517A (en) * | 2018-12-19 | 2019-05-10 | 努比亚技术有限公司 | Printed circuit board, terminal, firmware burning method and readable storage medium storing program for executing |
| WO2020187616A1 (en) * | 2019-03-18 | 2020-09-24 | Tridonic Gmbh & Co Kg | Address allocation and configuration of components of a lighting system using light signals |
| CN209912465U (en) * | 2019-06-28 | 2020-01-07 | 上海雷舞电子科技有限公司 | Flexible display device |
| CN110572911A (en) * | 2019-09-26 | 2019-12-13 | 深圳市明微电子股份有限公司 | Address coding method, address coding system and illumination system of cascade equipment |
| CN110708793A (en) * | 2019-09-26 | 2020-01-17 | 深圳市明微电子股份有限公司 | Cascade control method of cascade equipment, cascade equipment and illumination system |
| CN112074048A (en) * | 2020-09-16 | 2020-12-11 | 深圳市芯宇昊科技有限公司 | Power line control online addressing method and system without address line |
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