CN110716378B - Data burning method and device for light emitting diode, projector and storage medium - Google Patents

Data burning method and device for light emitting diode, projector and storage medium Download PDF

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CN110716378B
CN110716378B CN201910953028.XA CN201910953028A CN110716378B CN 110716378 B CN110716378 B CN 110716378B CN 201910953028 A CN201910953028 A CN 201910953028A CN 110716378 B CN110716378 B CN 110716378B
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emitting diode
diode
current value
current
light emitting
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CN110716378A (en
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高文刚
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Goertek Optical Technology Co Ltd
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Goertek Optical Technology Co Ltd
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02—Testing optical properties
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/26—Testing of individual semiconductor devices
    • G01R31/2607—Circuits therefor
    • G01R31/2632—Circuits therefor for testing diodes
    • G01R31/2635—Testing light-emitting diodes, laser diodes or photodiodes
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2053—Intensity control of illuminating light

Abstract

The invention discloses a data burning method and a data burning device for a light-emitting diode, a projector and a storage medium, wherein the light-emitting diode is used for projection display and comprises diodes with different colors, and the method comprises the following steps: receiving a data burning command, and sequentially lighting the diodes with different colors according to the burning command; obtaining corresponding current values according to the lighting sequence of the diodes with different colors; determining that the total current value flowing through the light-emitting diode reaches a set value according to the current value, and acquiring the total brightness value of the light-emitting diode; and judging whether the total brightness value is qualified or not, and carrying out data burning on the light-emitting diode according to the judgment result. The invention can effectively improve the efficiency of burning data.

Description

Data burning method and device for light emitting diode, projector and storage medium
Technical Field
The invention relates to the technical field of projection detection, in particular to a data burning method and device of a light emitting diode, a projector and a storage medium.
Background
In the field of projection display, an LED (Light Emitting Diode) is generally used as a display Light source, and when projection display equipment is assembled and produced, related data of the LED needs to be burned into a temporary storage in advance, so that the projection display equipment can be debugged according to the data stored by burning conveniently.
Before burning data, the performance of an LED needs to be detected, the current in the LED is detected through a current probe, the numerical value of the current is displayed through an oscilloscope, the oscilloscope records the numerical value of the test current at the same time, and the oscilloscope is difficult to display the record at the same time due to the fact that the LED has multiple colors and the LED with different colors has different numerical values of the current, so that the LED with each color needs to be measured independently in the mode of the current probe and the oscilloscope, and the efficiency of the process of measuring burning data is low.
The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.
Disclosure of Invention
Therefore, it is necessary to provide a method and an apparatus for burning data of a light emitting diode, a projector, and a storage medium, which can effectively improve the efficiency of measuring the burned data, in order to solve the problem of low efficiency of burning data caused by the current process of detecting data and burning data by using light sources with different colors.
In order to achieve the above object, the present invention provides a data burning method for light emitting diodes, where the light emitting diodes are used for projection display, the light emitting diodes include diodes with different colors, and the method includes:
receiving a data burning command, and sequentially lighting the diodes with different colors according to the burning command;
obtaining corresponding current values according to the lighting sequence of the diodes with different colors;
determining that the total current value flowing through the light-emitting diode reaches a set value according to the current value, and acquiring the total brightness value of the light-emitting diode;
and judging whether the total brightness value is qualified or not, and carrying out data burning on the light-emitting diode according to the judgment result.
Optionally, the light emitting diode includes a red diode, a green diode, and a blue diode, the step of receiving a data burning command and sequentially lighting the diodes with different colors according to the burning command includes:
and receiving a data burning command, and sequentially lightening the red diode, the green diode and the blue diode according to the burning command.
Optionally, the step of obtaining corresponding current values according to the lighting sequence of the diodes with different colors includes:
according to the lighting sequence of the red diode, the green diode and the blue diode;
and obtaining a first current value corresponding to the red diode, a second current value corresponding to the green diode and a third current value corresponding to the blue diode.
Optionally, the step of obtaining a first current value corresponding to the red diode, a second current value corresponding to the green diode, and a third current value corresponding to the blue diode includes:
detecting through an open current transformer to obtain a first mutual induction voltage corresponding to the red diode, a second mutual induction voltage corresponding to the green diode and a third mutual induction voltage corresponding to the blue diode;
and calculating a first current value, a second current value and a third current value according to the first mutual induction voltage, the second mutual induction voltage and the third mutual induction voltage by combining a preset formula.
Optionally, the step of determining, according to the current value, that a total current value flowing through the light emitting diode reaches a set value, and obtaining a total brightness value of the light emitting diode includes:
obtaining the total current value flowing through the light-emitting diode according to the current value;
comparing and judging whether the total current value reaches a set current peak value;
and when the total current value reaches a set current peak value, acquiring the total brightness value of the light-emitting diode through the illuminometer.
Optionally, the step of comparing and determining whether the total current value reaches the set current peak value further includes:
generating an adjusting instruction for adjusting the current value when the total current value does not reach a set value;
and adjusting the current value in the light emitting diode according to the adjusting instruction to enable the total current value to reach a set current peak value.
Optionally, the step of judging whether the total brightness value is qualified and burning the data of the light emitting diode according to the judgment result includes:
if the total brightness value is qualified, acquiring data information of the light emitting diode, and burning the data information;
and if the total brightness value is unqualified, adjusting the duty ratio of the current in the light-emitting diode, and judging whether the total brightness value is qualified or not according to the adjusted current.
In addition, in order to achieve the above object, the present invention further provides a data burning apparatus for light emitting diodes, the apparatus comprising:
the starting module is used for receiving a data burning command and sequentially lightening the diodes with different colors according to the burning command;
the detection module is used for obtaining corresponding current values according to the lighting sequence of the diodes with different colors;
the control module is used for determining that the total current value flowing through the light-emitting diode reaches a set value according to the current value and acquiring the total brightness value of the light-emitting diode;
and the judging module is used for judging whether the total brightness value is qualified or not and burning data of the light emitting diode according to a judging result.
In addition, in order to achieve the above object, the present invention further provides a projector, wherein a light emitting diode is disposed in the projector, and data in the light emitting diode is burned by the steps of the data burning method for the light emitting diode.
In addition, in order to achieve the above object, the present invention further provides a storage medium, where a data burning program of a light emitting diode is stored, and the data burning program of the light emitting diode, when executed by a processor, implements the steps of the data burning method of the light emitting diode as described above.
In the technical scheme provided by the invention, the color displayed by projection in the projection display equipment is formed by the light-emitting combination of the light-emitting diodes with different single colors by conducting current to the light-emitting diodes through a burning instruction, the light-emitting diodes with the single color are simultaneously lightened under the condition that human eyes cannot identify the color, and the color display equipment can also be understood as that the light-emitting diodes with different colors are lightened in sequence, so that the current values corresponding to the light-emitting diodes with different colors can be obtained according to the lightening time, the current value of each color diode can be obtained under the condition of one-time measurement, the measurement on each color diode is avoided, the measurement efficiency is improved, in addition, the current values obtained by detection are processed in a centralized manner, the total current value flowing through the light-emitting diodes is obtained according to the current values, and the total brightness value of the light-emitting diodes is obtained by detection after the total current value is determined to reach, and then judging whether the total brightness value is qualified, burning data of the light emitting diode according to the judgment result, burning the data into a temporary storage of the light emitting diode, facilitating debugging of subsequent installation of projection display equipment, and under the condition that current values corresponding to diodes with different colors can be obtained through one-time measurement, carrying out centralized analysis and judgment on the light emitting diode according to the detected current values, thereby further improving the overall efficiency of data burning.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a first embodiment of a method for burning data of an LED according to the present invention;
FIG. 2 is a schematic flow chart illustrating a second embodiment of a method for burning data of an LED according to the present invention;
FIG. 3 is a schematic flow chart illustrating a data burning method for an LED according to a third embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a fourth embodiment of a method for burning data of an LED according to the present invention;
FIG. 5 is a flowchart illustrating a fifth embodiment of a method for burning data of an LED according to the present invention;
FIG. 6 is a flowchart illustrating a sixth embodiment of a method for burning data of an LED according to the present invention;
FIG. 7 is a flowchart illustrating a seventh embodiment of a method for burning data of an LED according to the present invention;
FIG. 8 is a schematic diagram of the measurement performed by the open-ended current transformer in the data burning method of the light emitting diode according to the present invention;
FIG. 9 is a schematic diagram of the measured mutual inductance voltage of FIG. 8 with the current direction in the same direction;
FIG. 10 is a schematic diagram of the measured mutual inductance voltage of FIG. 8 with the current direction reversed;
FIG. 11 is a schematic diagram of a data acquisition burning card configuration shown in FIG. 9;
FIG. 12 is a schematic diagram of a data acquisition burning card configuration shown in FIG. 10;
FIG. 13 is a schematic structural diagram of a data recording device of a light emitting diode according to the present invention.
The reference numbers illustrate:
reference numerals Name (R) Reference numerals Name (R)
100 Opening module 500 Open current transformer
200 Detection module 510 Red diode current direction
300 Control module 520 Green diode current direction
400 Judging module 530 Current direction of blue diode
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes 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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, a first embodiment of the present invention provides a method for burning data of light emitting diodes, where the light emitting diodes are used for projection display, the light emitting diodes include diodes with different colors, and the method includes:
step S10, receiving a data burning command, and sequentially lighting diodes with different colors according to the burning command;
in particular, Light emitting diodes are used for projection displays, such as DLP (Digital Light processing) projection displays, which are generally abbreviated in english as LEDs, the computer can be controlled to send a data burning command to the singlechip, the singlechip receives the data burning command, and conducting current to the diodes with different colors according to the burning command, so that the diodes with different colors are lighted up to emit light, in the field of projection displays, only diodes of a single color are lit at the same time, the colors of the projection display are made up of the colors emitted by the diodes of a plurality of colors, because human eyes cannot recognize the time interval of the light emitting diodes, the human eyes see the combined color projection picture when observing, therefore, in the data burning command, the conduction order of the diodes with different colors is the same as that of the projection display, and the accuracy of subsequent detection data is ensured.
Data burning, which can also be referred to as data burning, is a technique of storing data in a register.
Step S20, obtaining corresponding current values according to the lighting sequence of the diodes with different colors;
when the diodes with different colors emit light, the required current values are different, for example, the current value required by a common red diode is relatively low, and under the condition of determining the lighting sequence of the diodes with different colors, the current value corresponding to each color diode can be synchronously measured, so that the separate measurement is avoided, the detection efficiency is effectively improved, and the burning efficiency is further improved.
Step S30, determining the total current value flowing through the light emitting diode to reach a set value according to the current value, and acquiring the total brightness value of the light emitting diode;
in DLP projection display, the leds are generally driven by a constant current source, and due to differences in manufacturing environments and manufacturing process tolerances of the leds, the total current value required for each color led is different when the same brightness is ensured, so that the leds need to be detected to ensure that the total current value led to the leds meets a set constant current source value.
Step S40, determining whether the total brightness value is qualified, and burning data of the light emitting diode according to the determination result.
Specifically, the total light-emitting brightness of the light-emitting diode is measured under the condition that the total current value flowing through the light-emitting diode meets a set value, and in the process of processing and manufacturing the light-emitting diode, the fluctuation of the quality of the light-emitting diode is inevitable, so that the condition that the total brightness value is unqualified needs to be adjusted, a product which is still unqualified after adjustment is marked, and the product which is qualified in the total brightness value is subjected to data burning.
In the embodiment, the color displayed by projection in the projection display device is formed by the light emitting combination of the light emitting diodes with different single colors by conducting current to the light emitting diodes through the burning instruction, and the light emitting diodes with the single color are simultaneously lightened under the condition that human eyes cannot identify the color, or the color display device can be understood as that the light emitting diodes with different colors are lightened in sequence, so that the current values corresponding to the light emitting diodes with different colors can be obtained according to the lightening time, therefore, the current value of each color diode can be obtained under the condition of one-time measurement, the light emitting diodes with each color are prevented from being respectively measured, the measurement efficiency is improved, in addition, the current values obtained by detection are processed in a centralized manner, the total current value flowing through the light emitting diodes is obtained according to the current values, and the total brightness value of the light emitting diodes is obtained by detection after the total current value is determined to reach the set, and then judging whether the total brightness value is qualified or not, burning data of the light emitting diode according to the judgment result, burning the data into a temporary storage of the light emitting diode, facilitating debugging of subsequent installation of projection display equipment, and under the condition that current values corresponding to diodes with different colors can be obtained through one-time measurement, carrying out centralized analysis and judgment on the light emitting diode according to the detected current values, further improving the overall efficiency of data burning, improving the measurement accuracy and reducing the operation steps of operators. In addition, the cost can be effectively saved due to the reduction of the use of the oscilloscope.
Referring to fig. 2, based on the first embodiment of the present invention, a second embodiment of the present invention is proposed, in which the light emitting diodes include a red diode, a green diode and a blue diode, the step S10 of receiving a data recording command and sequentially lighting the diodes with different colors according to the recording command includes:
step S11, receiving the data burning command, and sequentially lighting the red diode, the green diode and the blue diode according to the burning command.
Specifically, in the field of DPL projection display, generally, the leds are generally mounted on an optical machine, and the lighting sequence of the leds is rgb, so that the burning command also includes a command to light in the lighting sequence of rgb, and the measurement sequence is in accordance with the actual lighting sequence in the DPL projection display, so as to ensure the accuracy of measurement.
Referring to fig. 3, based on the second embodiment of the present invention, a third embodiment of the present invention is proposed, and the step S20 of obtaining corresponding current values according to the lighting sequence of the diodes with different colors includes:
step S210, according to the lighting sequence of the red diode, the green diode and the blue diode;
the light emitting diodes can also comprise light emitting diodes of other colors, the lighting sequence is not limited to red, green and blue, and the purpose of sequential lighting is to distinguish the current values corresponding to the diodes of each color.
In step S220, a first current value corresponding to the red diode, a second current value corresponding to the green diode, and a third current value corresponding to the blue diode are obtained.
In DLP projection display, the first current value in the red diode is lower than the second current value corresponding to the green diode and the third current value corresponding to the blue diode, and the second current value is equal to the third current value, so that the first current value, the second current value and the third current value can be effectively distinguished from the measured data.
Referring to fig. 4, based on the third embodiment of the present invention, the step S220 of obtaining the first current value corresponding to the red diode, the second current value corresponding to the green diode, and the third current value corresponding to the blue diode according to the fourth embodiment of the present invention includes:
step S221, referring to fig. 8, detecting through the open current transformer 500 to obtain a first mutual induction voltage corresponding to the red diode, a second mutual induction voltage corresponding to the green diode, and a third mutual induction voltage corresponding to the blue diode; 510 is the red diode current direction, 520 is the green diode current direction and 530 is the blue diode current direction.
Referring to fig. 9, the open-ended current transformer is prevented from being connected to the circuit of the light emitting diode, and the open-ended current transformer is only sleeved on a wire through which current flows, for example, the open-ended current transformer is sleeved on current input ends of the red diode, the green diode and the blue diode, or sleeved on current output ends of the red diode, the green diode and the blue diode, and corresponding mutual induction voltages, that is, a first mutual induction voltage corresponding to the red diode, a second mutual induction voltage corresponding to the green diode and a third mutual induction voltage corresponding to the blue diode, are measured through current flowing through the coil.
In addition, as shown in fig. 10, when the mutual inductance voltage is measured, the current flowing through the wires may be reversed, for example, the open current transformer is sleeved on the input end wires of the red diode and the green diode, and sleeved on the output end wire of the blue diode, and the third mutual inductance voltage obtained by the measurement is reversed, so that the mutual inductance voltages of the green diode and the blue diode can be further distinguished, and the current values thereof can be further distinguished, that is, the red diode corresponds to the first current value, the green diode corresponds to the second current value, and the blue diode corresponds to the third current value. When setting the current reversal, not limited to the blue diode current reversal, the red diode current reversal or the green diode current reversal can also achieve the mutual voltage reversal.
Step S222, calculating a first current value, a second current value and a third current value according to the first mutual induction voltage, the second mutual induction voltage and the third mutual induction voltage by combining a preset formula.
Specifically, the open current transformer is connected with a data acquisition burning card, a single chip microcomputer is arranged in the data acquisition burning card and used for controlling the data acquisition burning card to receive and execute related commands, the data acquisition burning card is provided with a storage unit, and a calculation formula is preset in the storage unit
Uo＝KUi
Wherein U isoFor amplifying the output amplified voltage after filtering, K is a constant UiThe mutual inductance voltage is output by the open current transformer.
Ui＝gI
G is a constant, and I is a current value flowing through the light emitting diode, so that mutual inductance voltage is obtained through measurement of the open current transformer, noise is filtered and simultaneously the mutual inductance voltage is amplified according to an amplifying filter arranged in the data acquisition burning card to generate amplified voltage, corresponding current values are calculated according to the formula, the calculated current values corresponding to the LEDs of each color are added, and a total current value is calculated.
In addition, whether the direction of current flowing through the coil of the open current transformer is reversed or not is corresponded, the data acquisition and burning card also has two setting modes, as shown in fig. 11, a single chip microcomputer STM32 and a PC (personal computer) are connected, the single chip microcomputer STM32 and the PC realize data transmission, LED synchronous signals are input, namely the direction of LED current is the same, the single chip microcomputer STM32 receives the signals, the current transformer is controlled to detect mutual inductance voltage, the mutual inductance voltage is amplified and filtered, then the voltage output by the front stage is transmitted to the rear stage circuit without influence through a voltage follower, namely transmitted to the single chip microcomputer STM32, the PC issues burning data to the single chip microcomputer STM32 through a USB peripheral, the single chip microcomputer STM32 burns the data to a register through an IIC or an SPI peripheral, wherein the IIC is a two-wire serial bus interface, and the SPI is a four-wire serial.
Referring to fig. 12, when the current flowing through the current transformer is reversed, the voltage of the blue diode collected by the current transformer is negative, and the negative signal is converted into a positive signal by the reverser, so that the blue diode voltage signal is collected and received by the single chip microcomputer STM32 subsequently, the voltage comparator is used for amplifying and filtering the filtered voltage signal, the voltage signal output by the amplification and filtering rises from the red diode to the green diode, and a synchronous pulse signal is output, so that the single chip microcomputer STM32 can distinguish and collect the current values of the red diode and the green diode.
Referring to fig. 5, based on the first embodiment of the present invention, a fifth embodiment of the present invention is proposed, in which the step S30 of determining that the total value of the current flowing through the light emitting diode reaches the set value according to the current value and obtaining the total value of the brightness of the light emitting diode includes:
step S310, obtaining the total current value flowing through the light-emitting diode according to the current value;
specifically, the current values of the light emitting diodes of each color in the same turn-on period are added, and the total current value flowing through the light emitting diodes is calculated, wherein the same turn-on period refers to the period from the turn-on lighting of the red diodes to the next turn-on lighting of the red diodes.
Step S320, comparing and judging whether the total current value reaches a set current peak value;
the current peak value refers to a driven constant current value, and in general DLP projection display, the light emitting diode is driven by a constant current source, so that the current flowing through the light emitting diode is required to be the current peak value, the current value is ensured to be the same as that in DLP projection display, and the measurement accuracy is further ensured.
In step S330, when the total current value reaches the set current peak value, the total brightness value of the light emitting diode is obtained by the illuminometer.
The total brightness value is an important parameter of the projection display device, and after the total current value reaches a set current peak value, the total brightness value of the light-emitting diodes is obtained through the illuminometer, wherein the total brightness value is the total brightness value of light emitted by the diodes of different colors.
Referring to fig. 6, based on the fifth embodiment of the present invention, a sixth embodiment of the present invention is proposed, wherein the step S320 of comparing and determining whether the total current value reaches the set current peak value further includes:
step S340, generating an adjusting instruction for adjusting the current value when the total current value does not reach a set value;
specifically, when the total current value is detected to be less than the set value, the total current value needs to be adjusted, for example, when the total current value is detected to be less than the set value, the controller or the computer generates a command for increasing the current output, and the current output is increased.
In step S350, the current value in the light emitting diode is adjusted according to the adjustment command, so that the total current value reaches the set current peak value.
Specifically, the data acquisition burning card provided with the single chip microcomputer receives the increased current value, the light emitting diode is lightened again according to the adjustment instruction until the total current value reaches the set current peak value, and the data burning of the diode is started, so that the total current value flowing through the light emitting diode can be ensured to meet the set value through the step S340 and the step S350, the set value can be changed and set according to the requirements of a user, the set value is identical to the output current value of the constant current source in the projection display, the accuracy of measured data is ensured, and the normal data burning is ensured.
Referring to fig. 7, the seventh embodiment of the present invention is provided, wherein the step S40 of determining whether the total brightness value is qualified and burning data of the light emitting diode according to the determination result includes:
step S410, if the total brightness value is qualified, acquiring data information of the light emitting diode, and burning the data information;
specifically, if the total brightness value is qualified, data information of the light emitting diode is acquired, wherein the data information includes a current peak value, duty ratio information, a total brightness value, a chromaticity coordinate and the like, the data information is burned through a data acquisition burning card, the light emitting diode is generally arranged on an optical machine, the optical machine includes a temporary storage, and the data acquisition burning card burns the data information into the temporary storage.
Step S420, if the total brightness value is not qualified, adjusting a duty ratio of a current in the light emitting diode, and determining whether the total brightness value is qualified according to the adjusted current.
Specifically, if the total brightness value is not qualified, the controller or the computer or the single chip determines whether the current duty ratio of the light emitting diode has an adjustment space, and if the adjustment space has, the current ratio in the diodes with different colors is changed, for example, the light emitting diode includes diodes with three colors in total, the red diode corresponds to a first current value, the green diode corresponds to a second current value, and the blue diode corresponds to a third current value, the total current value is 1A, the first current value is 0.3A, the second current value is 0.35A, the third current value is 0.35A, the total brightness value is not qualified at this moment, the first current value is adjusted to 0.32, the second current value is adjusted to 0.34A, the third current value is adjusted to 0.34A, and whether the total brightness value is qualified is measured again until the total brightness value is qualified or the duty ratio has no adjustment space, the optical engine body with the total brightness value being not qualified is burned with non-qualified, the outflow of the defective products is avoided.
Referring to fig. 13, the present invention further provides a data burning apparatus for led, the apparatus comprising: the system comprises a starting module 100, a detection module 200, a control module 300 and a judgment module 400.
The starting module 100 is configured to receive a data burning command, and sequentially light up the diodes with different colors according to the burning command; specifically, the light emitting diode is used for projection display, such as DLP projection display, the light emitting diode is generally abbreviated as LED in english, a data burning instruction can be sent to the single chip microcomputer through the control computer, the single chip microcomputer receives the data burning instruction, and current is conducted to the diodes with different colors according to the burning instruction, so that the diodes with different colors are lightened to emit light.
The detection module 200 is configured to obtain corresponding current values according to the lighting sequence of the diodes with different colors; when the diodes with different colors emit light, the required current values are different, for example, the current value required by a common red diode is relatively low, and under the condition of determining the lighting sequence of the diodes with different colors, the current value corresponding to each color diode can be synchronously measured, so that the separate measurement is avoided, the detection efficiency is effectively improved, and the burning efficiency is further improved.
The control module 300 is configured to determine, according to the current value, that a total current value flowing through the light emitting diode reaches a set value, and obtain a total brightness value of the light emitting diode; in DLP projection display, the leds are generally driven by a constant current source, and due to differences in manufacturing environments and manufacturing process tolerances of the leds, the total current value required for each color led is different when the same brightness is ensured, so that the leds need to be detected to ensure that the total current value led to the leds meets a set constant current source value.
The judging module 400 is configured to judge whether the total brightness value is qualified, and perform data burning on the light emitting diode according to a judgment result. Specifically, the total light-emitting brightness of the light-emitting diode is measured under the condition that the total current value flowing through the light-emitting diode meets a set value, and in the process of processing and manufacturing the light-emitting diode, the fluctuation of the quality of the light-emitting diode is inevitable, so that the condition that the total brightness value is unqualified needs to be adjusted, a product which is still unqualified after adjustment is marked, and the product which is qualified in the total brightness value is subjected to data burning.
In the embodiment, the color displayed by projection in the projection display device is formed by the light emitting combination of the light emitting diodes with different single colors by conducting current to the light emitting diodes through the burning instruction, and the light emitting diodes with the single color are simultaneously lightened under the condition that human eyes cannot identify the color, or the color display device can be understood as that the light emitting diodes with different colors are lightened in sequence, so that the current values corresponding to the light emitting diodes with different colors can be obtained according to the lightening time, therefore, the current value of each color diode can be obtained under the condition of one-time measurement, the light emitting diodes with each color are prevented from being respectively measured, the measurement efficiency is improved, in addition, the current values obtained by detection are processed in a centralized manner, the total current value flowing through the light emitting diodes is obtained according to the current values, and the total brightness value of the light emitting diodes is obtained by detection after the total current value is determined to reach the set, and then judging whether the total brightness value is qualified or not, burning data of the light emitting diode according to the judgment result, burning the data into a temporary storage of the light emitting diode, facilitating debugging of subsequent installation of projection display equipment, and under the condition that current values corresponding to diodes with different colors can be obtained through one-time measurement, carrying out centralized analysis and judgment on the light emitting diode according to the detected current values, further improving the overall efficiency of data burning, improving the measurement accuracy and reducing the operation steps of operators. In addition, the cost can be effectively saved due to the reduction of the use of the oscilloscope.
Further, the light emitting diodes include a red diode, a green diode, and a blue diode, and the start module 100 is configured to receive a data burning command and sequentially light up the red diode, the green diode, and the blue diode according to the data burning command. Specifically, in the field of DPL projection display, generally, the leds are generally mounted on an optical machine, and the lighting sequence of the leds is rgb, so that the burning command also includes a command to light in the lighting sequence of rgb, and the measurement sequence is in accordance with the actual lighting sequence in the DPL projection display, so as to ensure the accuracy of measurement.
Further, the detecting module 200 is further configured to determine a lighting sequence of the red diode, the green diode, and the blue diode; the light emitting diodes can also comprise light emitting diodes of other colors, the lighting sequence is not limited to red, green and blue, and the purpose of sequential lighting is to distinguish the current values corresponding to the diodes of each color. And obtaining a first current value corresponding to the red diode, a second current value corresponding to the green diode and a third current value corresponding to the blue diode.
In DLP projection display, the first current value in the red diode is lower than the second current value corresponding to the green diode and the third current value corresponding to the blue diode, and the second current value is equal to the third current value, so that the first current value, the second current value and the third current value can be effectively distinguished from the measured data.
Further, the detection module 200 is further configured to obtain a first mutual induction voltage corresponding to the red diode, a second mutual induction voltage corresponding to the green diode, and a third mutual induction voltage corresponding to the blue diode through detection of the open-ended current transformer;
the open current transformer is sleeved on a current input end of a red diode, a current input end of a green diode and a current input end of a blue diode, or sleeved on a current output end of the red diode, the green diode and the blue diode, and corresponding mutual induction voltages, namely a first mutual induction voltage corresponding to the red diode, a second mutual induction voltage corresponding to the green diode and a third mutual induction voltage corresponding to the blue diode, are measured through current flowing through a coil.
In addition, when measuring mutual inductance voltage, can be with wherein the reverse setting of the electric current that flows through in the wire, for example, opening current transformer cup joints red diode and green diode input end wire, cup joints blue diode output end wire, the third mutual inductance voltage that so measures and reachs is reverse, can further distinguish green diode and blue diode's mutual inductance voltage, further distinguish its current value, just can effectively distinguish simultaneously through once measuring, red diode corresponds first current value, the second current value that green diode corresponds to and the third current value that blue diode corresponds. When setting the current reversal, not limited to the blue diode current reversal, the red diode current reversal or the green diode current reversal can also achieve the mutual voltage reversal.
And calculating a first current value, a second current value and a third current value according to the first mutual induction voltage, the second mutual induction voltage and the third mutual induction voltage by combining a preset formula. Specifically, the open current transformer is connected with a data acquisition burning card, a single chip microcomputer is arranged in the data acquisition burning card and used for controlling the data acquisition burning card to receive and execute related commands, the data acquisition burning card is provided with a storage unit, and a calculation formula is preset in the storage unit
Uo＝KUi
Wherein U isoFor amplifying the output amplified voltage after filtering, K is a constant UiThe mutual inductance voltage is output by the open current transformer.
Ui＝gI
G is a constant, and I is a current value flowing through the light emitting diode, so that mutual inductance voltage is obtained through measurement of the open current transformer, noise is filtered and simultaneously the mutual inductance voltage is amplified according to an amplifying filter arranged in the data acquisition burning card to generate amplified voltage, corresponding current values are calculated according to the formula, the calculated current values corresponding to the LEDs of each color are added, and a total current value is calculated.
In addition, whether the current direction that corresponds the opening current transformer coil of flowing through is reverse, data acquisition burns record card and has two kinds of setting mode equally, singlechip STM32 and PC computer are connected, singlechip STM32 and PC computer realize data mutual transmission, wherein input LED synchronizing signal, LED current direction syntropy promptly, singlechip STM32 receives this signal, control current transformer surveys mutual inductive voltage, through enlargiing filtering to mutual inductive voltage, the later stage circuit is carried to the voltage that the preceding stage was exported through the voltage follower nothing influence afterwards, carry to singlechip STM32 promptly, the PC computer passes through the USB peripheral hardware, it burns record data to send to singlechip 32 to burn record data, singlechip STM32 burns record data to the temporary memory through IIC or SPI peripheral hardware, wherein IIC is two-wire system serial bus interface, SPI is four-wire system serial bus interface.
When the current flowing through the current transformer is reversed, the voltage of the blue diode collected by the current transformer is negative, the negative signal is converted into a positive signal through the reverser, so that the blue diode voltage signal is collected and received by the singlechip STM32 subsequently, the voltage comparator is used for amplifying and filtering the voltage signal, the voltage signal output by the amplifying and filtering is increased from the red diode to the green diode, and a synchronous pulse signal is output, so that the singlechip STM32 can distinguish and collect the current values of the red diode and the green diode.
Further, the control module 300 is configured to obtain a total current value flowing through the light emitting diode according to the current value; specifically, the current values of the light emitting diodes of each color in the same turn-on period are added, and the total current value flowing through the light emitting diodes is calculated, wherein the same turn-on period refers to the period from the turn-on lighting of the red diodes to the next turn-on lighting of the red diodes.
Comparing and judging whether the total current value reaches a set current peak value or not; the current peak value refers to a driven constant current value, and in general DLP projection display, the light emitting diode is driven by a constant current source, so that the current flowing through the light emitting diode is required to be the current peak value, the current value is ensured to be the same as that in DLP projection display, and the measurement accuracy is further ensured.
And when the total current value reaches a set current peak value, acquiring the total brightness value of the light-emitting diode through the illuminometer. The total brightness value is an important parameter of the projection display device, and after the total current value reaches a set current peak value, the total brightness value of the light-emitting diodes is obtained through the illuminometer, wherein the total brightness value is the total brightness value of light emitted by the diodes of different colors.
Further, the control module 300 is further configured to generate an adjustment instruction for adjusting the current value when the total current value does not reach the set value; specifically, when the total current value is detected to be less than the set value, the total current value needs to be adjusted, for example, when the total current value is detected to be less than the set value, the controller or the computer generates a command for increasing the current output, and the current output is increased.
And adjusting the current value in the light-emitting diode according to the adjusting instruction to enable the total current value to reach the set current peak value. Specifically, the data acquisition burning card provided with the single chip microcomputer receives the increased current value, the light emitting diode is lighted again according to the adjustment instruction, and the data burning of the diode is executed until the total current value reaches the set current peak value, so that the control module 300 can ensure that the total current value flowing through the light emitting diode meets the set value, and the set value can be changed and set according to the requirement of a user to meet the requirement that the set value is the same as the output current value of the constant current source in projection display, and the accuracy of measured data is ensured, so that the normal data burning is ensured.
Further, the determining module 400 is further configured to obtain data information of the light emitting diode and burn the data information if the total brightness value is qualified; specifically, if the total brightness value is qualified, data information of the light emitting diode is acquired, wherein the data information includes a current peak value, duty ratio information, a total brightness value, a chromaticity coordinate and the like, the data information is burned through a data acquisition burning card, the light emitting diode is generally arranged on an optical machine, the optical machine includes a temporary storage, and the data acquisition burning card burns the data information into the temporary storage.
And if the total brightness value is not qualified, adjusting the duty ratio of the current in the light-emitting diode, and judging whether the total brightness value is qualified or not according to the adjusted current. Specifically, if the total brightness value is not qualified, the controller or the computer or the single chip determines whether the current duty ratio of the light emitting diode has an adjustment space, and if the adjustment space has, the current ratio in the diodes with different colors is changed, for example, the light emitting diode includes diodes with three colors in total, the red diode corresponds to a first current value, the green diode corresponds to a second current value, and the blue diode corresponds to a third current value, the total current value is 1A, the first current value is 0.3A, the second current value is 0.35A, the third current value is 0.35A, the total brightness value is not qualified at this moment, the first current value is adjusted to 0.32, the second current value is adjusted to 0.34A, the third current value is adjusted to 0.34A, and whether the total brightness value is qualified is measured again until the total brightness value is qualified or the duty ratio has no adjustment space, the optical engine body with the total brightness value being not qualified is burned with non-qualified, the outflow of the defective products is avoided.
The invention also provides a projector, wherein the projector is provided with the light emitting diode, and the data in the light emitting diode is subjected to data burning by adopting the steps of the data burning method of the light emitting diode.
The specific implementation of the projector according to the present invention may refer to the embodiments of the data burning method for the light emitting diode, and will not be described herein again.
The invention also provides a storage medium, wherein the storage medium is stored with a data burning program of the light emitting diode, and the data burning program of the light emitting diode realizes the steps of the data burning method of the light emitting diode when being executed by a processor.
The specific implementation of the storage medium of the present invention may refer to the embodiments of the data burning method of the light emitting diode, which are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A data burning method of a light emitting diode is characterized in that the light emitting diode is used for projection display, the light emitting diode comprises diodes with different colors, and the method comprises the following steps:
receiving a data burning command, and sequentially lighting the diodes with different colors according to the burning command;
obtaining corresponding current values according to the lighting sequence of the diodes with different colors;
determining that the total current value flowing through the light-emitting diode reaches a set value according to the current value, and acquiring the total brightness value of the light-emitting diode;
and judging whether the total brightness value is qualified or not, and carrying out data burning on the light-emitting diode according to the judgment result.
2. The method of claim 1, wherein the leds comprise red, green and blue leds, and the step of receiving a data burning command and sequentially lighting the leds of different colors according to the burning command comprises:
and receiving a data burning command, and sequentially lightening the red diode, the green diode and the blue diode according to the burning command.
3. The method as claimed in claim 2, wherein the step of obtaining the corresponding current values according to the lighting sequence of the different color diodes comprises:
according to the lighting sequence of the red diode, the green diode and the blue diode;
and obtaining a first current value corresponding to the red diode, a second current value corresponding to the green diode and a third current value corresponding to the blue diode.
4. The method as claimed in claim 3, wherein the step of obtaining the first current value corresponding to the red diode, the second current value corresponding to the green diode, and the third current value corresponding to the blue diode comprises:
detecting through an open current transformer to obtain a first mutual induction voltage corresponding to the red diode, a second mutual induction voltage corresponding to the green diode and a third mutual induction voltage corresponding to the blue diode;
and calculating a first current value, a second current value and a third current value according to the first mutual induction voltage, the second mutual induction voltage and the third mutual induction voltage by combining a preset formula.
5. The method as claimed in claim 1, wherein the step of determining that the total current flowing through the led reaches a predetermined value according to the current value and obtaining the total brightness value of the led comprises:
obtaining the total current value flowing through the light-emitting diode according to the current value;
comparing and judging whether the total current value reaches a set current peak value;
and when the total current value reaches a set current peak value, acquiring the total brightness value of the light-emitting diode through the illuminometer.
6. The method of claim 5, wherein the step of comparing and determining whether the total current value reaches a predetermined current peak value further comprises:
generating an adjusting instruction for adjusting the current value when the total current value does not reach a set value;
and adjusting the current value in the light emitting diode according to the adjusting instruction to enable the total current value to reach a set current peak value.
7. The method as claimed in any of claims 1-6, wherein the step of determining whether the total brightness value is acceptable and writing data to the light emitting diode according to the determination result comprises:
if the total brightness value is qualified, acquiring data information of the light emitting diode, and burning the data information;
and if the total brightness value is unqualified, adjusting the duty ratio of the current in the light-emitting diode, and judging whether the total brightness value is qualified or not according to the adjusted current.
8. A data burning device of light emitting diodes, wherein the light emitting diodes are used for projection display, the light emitting diodes comprise diodes with different colors, and the device comprises:
the starting module is used for receiving a data burning command and sequentially lightening the diodes with different colors according to the burning command;
the detection module is used for obtaining corresponding current values according to the lighting sequence of the diodes with different colors;
the control module is used for determining that the total current value flowing through the light-emitting diode reaches a set value according to the current value and acquiring the total brightness value of the light-emitting diode;
and the judging module is used for judging whether the total brightness value is qualified or not and burning data of the light emitting diode according to a judging result.
9. A projector, wherein a light emitting diode is disposed in the projector, and data in the light emitting diode is burned by the steps of the data burning method of the light emitting diode according to any one of claims 1 to 7.
10. A storage medium, wherein a data burning program of a light emitting diode is stored on the storage medium, and when being executed by a processor, the data burning program of the light emitting diode realizes the steps of the data burning method of the light emitting diode according to any one of claims 1 to 7.
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