WO2020233124A1 - 投影仪光机测试系统及方法 - Google Patents

投影仪光机测试系统及方法 Download PDF

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Publication number
WO2020233124A1
WO2020233124A1 PCT/CN2019/129185 CN2019129185W WO2020233124A1 WO 2020233124 A1 WO2020233124 A1 WO 2020233124A1 CN 2019129185 W CN2019129185 W CN 2019129185W WO 2020233124 A1 WO2020233124 A1 WO 2020233124A1
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current
projector
led
value
green
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English (en)
French (fr)
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高文刚
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Goertek Inc
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Goertek Inc
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    • 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

Definitions

  • the invention relates to the technical field of electronic circuits, in particular to a projector optical-mechanical testing system and method.
  • the test method of the projector optical machine is usually the scheme of sampling current probe + oscilloscope + PC + burner.
  • this test method needs to manually read the data and make records, import the recorded data to the PC, and then burn to the burner through the PC. It requires manual operation, is intelligent, and is less inconvenient for the operator to make, and it is easy There was a problem with logging errors.
  • the main purpose of the present invention is to provide a projector optical-mechanical test system and method, aiming to improve the intelligence of the projector optical-mechanical test.
  • the present invention provides a projector optical-mechanical test system, which includes:
  • the test terminal is configured to output current control signals during testing
  • the optical machine test platform is configured for placement of the optical machine of the projector under test, and drives the optical machine of the projector under test to work according to the current control signal;
  • the data acquisition and burning board is configured to obtain the current brightness value of the projector under test and the current value of the red, green and blue LEDs in the projector under the current brightness, and display the current value of the red, green and blue LEDs When the brightness value matches the preset brightness value, make sure the current setting of each LED is correct;
  • the test terminal is also configured to record the current values of the red, green and blue LEDs at the current brightness, and burn them to the memory of the projector under test through the data acquisition and burn board.
  • the data acquisition and burning board is further configured to determine the current LEDs according to the current brightness value and the preset current values of the red, green and blue LEDs when the current brightness value does not match the preset brightness value Whether the current is adjustable, and output the current adjustment trigger signal/projector optical machine abnormality detection signal;
  • the test terminal is also configured to control the optomechanical test platform to adjust the current value of the corresponding LED in the red, green and blue LEDs according to the current adjustment trigger signal when the current of each LED is currently adjustable;
  • the abnormality detection signal of the projector optical machine is burned to the memory of the projector optical machine to be tested through the data acquisition and burning board.
  • the data acquisition and burning board is further configured to obtain the adjusted brightness value of the projector optical machine
  • the adjusted brightness value of the projector optical machine matches the preset brightness value, and the current current value of the red, green and blue LEDs is less than the preset current value, it is determined that the current value of each LED is set correctly, And output the adjusted LED current value to the test terminal;
  • the data acquisition and programming board includes a current transformer, a signal conversion circuit, and a main controller.
  • the current transformer is set corresponding to the red, green and blue LEDs, and the output terminal of the current transformer is connected to the The input terminal of the signal conversion circuit is connected, and the output terminal of the signal conversion circuit is connected with the input terminal of the main controller.
  • the signal conversion circuit includes an amplifying and filtering circuit, a filter, a peak hold circuit, and a voltage follower
  • the input of the amplifying and filtering circuit is the input of the signal conversion circuit
  • the output of the amplifying and filtering circuit The terminal is connected to the input terminal of the peak hold circuit via the filter, and the output terminal of the peak hold circuit is connected to the input terminal of the voltage follower
  • the output terminal of the voltage follower is the signal conversion circuit The output terminal.
  • the projector optical-mechanical test system further includes:
  • the first communication port is configured to realize the communication connection between the test terminal and the main controller.
  • the projector optical-mechanical test system further includes:
  • the second communication port is configured to realize the memory of the main controller and the optical machine of the projector under test.
  • the present invention also provides a projector optical-mechanical testing method, the projector optical-mechanical testing method includes:
  • the method further includes:
  • each LED When the current value of each LED is currently adjustable, adjust the current value of the red, green and blue LEDs of the optical machine of the projector to be tested according to the current adjustment trigger signal;
  • the method further includes:
  • the adjusted brightness value of the projector optical machine matches the preset brightness value, and the current current value of the red, green and blue LEDs is less than the preset current value, it is determined that the current value of each LED is set correctly, And record the adjusted LED current value;
  • the present invention sets a test terminal and outputs a current control signal during testing, so that the optical-mechanical test platform drives the optical-mechanical operation of the projector to be tested according to the current control signal, and is also provided with a data acquisition and burning board, and Obtain the current brightness value of the projector under test and the current value of the red, green and blue LEDs under the current brightness of the projector, and the current brightness values of the red, green and blue LEDs are matched with the preset brightness values At the time, confirm that the current value of each LED is set correctly, and output the determined current value of each LED to the test terminal to record the current value of the red, green and blue LEDs under the current brightness, and burn through the data acquisition and programming board Record to the memory of the projector under test, so as to realize the intelligent test of the projector.
  • the invention improves the intelligence of the optical and mechanical test of the projector, does not require manual operation, and solves the problem that the intelligence of the optical and mechanical test of the projector is low and inconvenient for operators and the problem of
  • Fig. 1 is a schematic diagram of functional modules of an embodiment of an optical-mechanical testing system for a projector according to the present invention
  • FIG. 2 is a schematic diagram of the circuit structure of an embodiment of the optical-mechanical test system for a projector of the present invention
  • FIG. 3 is a schematic structural diagram of an embodiment of a test terminal in the optical-mechanical test system for a projector of the present invention
  • FIG. 4 is a schematic flowchart of an embodiment of an optical-mechanical testing method for a projector according to the present invention
  • FIG. 5 is a schematic flowchart of another embodiment of the optical-mechanical testing method for a projector according to the present invention.
  • FIG. 6 is a schematic flowchart of another embodiment of the optical-mechanical testing method for a projector according to the present invention.
  • Fig. 7 is a conversion process diagram of the signal conversion circuit in the optical-mechanical test system of the projector of the present invention.
  • Signal conversion circuit 200 Optical machine test platform 330
  • Main controller 300 Data acquisition programming board 321A, 321B, 321C Amplifying filter circuit 310A, 310B, 310C Current Transformer 322A, 322B, 322C Peak hold circuit 323A, 323B, 323C Voltage follower To To
  • the directional indication is only used to explain that it is in a specific posture (as shown in the drawings). If the specific posture changes, the relative positional relationship, movement, etc. of the components below will also change the directional indication accordingly.
  • the invention provides an optical-mechanical test system for a projector.
  • the projector optical machine there are usually LED light sources, condensers, lenses and other structures.
  • the LED sources are usually implemented by RGB red, green and blue LEDs. Due to the difference between the RGB red, green and blue LED bodies, each The current value of the RGB LED drive current of the projector is different, so it is necessary to adjust the LED current value and the set brightness data of the projector, and record the adjusted LED current value and brightness data.
  • the test method of the projector optical machine is usually the scheme of sampling current probe + oscilloscope + PC + burner.
  • the oscilloscope is connected with three current probes to test the current passing through the RGB red, green and blue LEDs.
  • the oscilloscope displays and records the test data.
  • the PC reads and records the test data through USB/serial/Ethernet ports, and the writer will test The data is burned to the optical machine body for use by the whole machine manufacturer.
  • this test method needs to manually read the data and make records, import the recorded data to the PC, and then burn to the burner through the PC. It requires manual operation, is intelligent, and is less inconvenient for the operator to make, and it is easy There was a problem with logging errors.
  • the projector optical-mechanical test system includes:
  • the test terminal 100 is configured to output a current control signal during testing
  • the optical machine test platform 200 is configured to place the optical machine of the projector to be tested, and drive the optical machine of the projector to be tested to work according to the current control signal;
  • the data acquisition and burning board 300 is configured to obtain the current brightness value of the projector under test and the current value of the red, green and blue LEDs under the current brightness in the projector and the current value of the red, green and blue LEDs. When the current brightness value matches the preset brightness value, make sure the current setting of each LED is correct;
  • the test terminal 100 is also configured to record the current values of the red, green and blue LEDs at the current brightness, and burn them to the memory of the optical machine of the projector to be tested through the data acquisition and burning board 300.
  • test terminal 100 may be a PC, or a terminal device such as a smart phone, a tablet computer, an e-book reader, and a portable computer.
  • the terminal may include: a processor 101, such as a CPU, a network interface 104, a user interface 103, a memory 105, and a communication bus 102.
  • the communication bus 102 is used to implement connection and communication between these components.
  • the user interface 103 may include a display screen (Display) and an input unit such as a keyboard (Keyboard), and the optional user interface 103 may also include a standard wired interface and a wireless interface.
  • the network interface 104 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface).
  • the memory 105 may be a high-speed RAM memory, or a non-volatile memory (non-volatile memory), such as a magnetic disk memory.
  • the memory 105 may also be a storage device independent of the aforementioned processor 101.
  • the light machine test platform 200 is used for placing and fixing the light machine to be measured, and when the light machine to be measured is tested, it drives the light machine to be measured to work according to the control signal output by the test terminal 100 to complete the test of the light machine to be measured .
  • the red, green, and blue LEDs when the red, green, and blue LEDs are working, the red, green, and blue LEDs light up in a certain order in a working cycle. Due to the differences in the red, green, and blue LEDs, they are at the same brightness. Under the circumstances, the current value of driving the LED may be different.
  • the current value data of the LED drive current is an important parameter tested and recorded by the production line. When adjusting the brightness of the DLP projector, it can be achieved by adjusting the current value of the red, green and blue LED drive current.
  • the test terminal 100 can first send a current value control command, that is, a current control signal, to the optical machine test platform 200, and the optical machine test platform 200 can control the command according to the current value. Output the corresponding current value to drive the optical machine to work.
  • the data acquisition and burning board 300 will obtain the actual brightness of the optical engine and the current value that drives the optical engine at this time.
  • the data acquisition and burning board 300 will be red according to the collected actual luminance of the optical engine and the current brightness of the projector optical engine.
  • the current value of the green and blue LEDs is used to determine whether the current brightness value of each LED matches the preset brightness value, so as to determine that the current value of each LED is set correctly.
  • the blue LED and the green LED it can be determined that the current brightness value matches the preset brightness value.
  • the current brightness of the red, green and blue LEDs If the value matches the preset brightness value, it can be determined that the current value of each LED is set correctly.
  • the brightness of one of the LEDs is dark, or the brightness of one of the LEDs is bright, and the brightness of the three colors of LEDs is inconsistent, that is, the current brightness is not The preset brightness is reached.
  • the brightness of the red LED is darker than the brightness of the blue LED and the green LED as an example, but it is not limited to this embodiment.
  • the brightness of the red LED is darker than the brightness of the blue LED and the green LED among the obtained red, green and blue LEDs, you can increase the current value of the red LED, and/or decrease the red, green and blue of the green LED and the blue LED.
  • the current values of the three-color LEDs are used to adjust the brightness of the red, green and blue LEDs to be consistent or substantially consistent. And in this process, it is necessary to ensure that the brightness of the blue LED and the green LED are within the preset brightness range, or the current value of the red LED does not exceed its maximum current value, to brighten the brightness of the red LED.
  • the brightness of the blue LED and/or the green LED is dimmed until the three color LEDs all reach the preset brightness value, and the brightness of the three is the same or basically the same.
  • the current adjustment value of the red LED will be adjusted when the brightness of the red LED is dimmed and the brightness of the blue LED and/or green LED is dimmed.
  • the maximum current value range is exceeded, or the brightness value of the blue LED and the green LED is lower than the preset brightness value, it can be determined that the current value of the optical machine is not adjustable at this time.
  • the data acquisition and programming board 300 will feed back corresponding detection results to the test terminal 100 based on the detection data, so that the test terminal 100 can act according to the detection results. Specifically, when it is determined that the current value of each LED in the red, green and blue LEDs is set correctly, the test terminal 100 will report the current brightness and color of the light machine fed back by the data acquisition and burn board 300 to the red, green, and blue LEDs. The current value of the LED is burned into the optical engine body through the data acquisition and burn board 300. When it is determined that the current value of the LED in the red, green and blue three-color LEDs is not set correctly, but the current value of the optical machine is adjustable, the corresponding current value adjustment control command can be output according to the adjustment ratio determined by the acquisition and programming board.
  • the optical machine test platform 200 can adjust the control command according to the current value and output the corresponding current value to drive the optical machine to work and change the current brightness of the optical machine until the brightness of each LED of the optical machine reaches the preset brightness.
  • the data acquisition and burning board 300 will re-record the brightness and current values of the red, green and blue LEDs, and burn them into the optical engine body through the data acquisition and burning board 300.
  • the test terminal 100 burns the NG information of the optical machine into the optical system through the data acquisition and burning board 300. The body of the machine avoids shipment of NG products.
  • the present invention sets the test terminal 100 and outputs a current control signal during the test, so that the optical-mechanical test platform 200 drives the optical-mechanical operation of the projector under test according to the current control signal, and is also provided with a data acquisition and burning board 300, and obtain the current brightness value of the projector under test and the current value of the red, green and blue LEDs under the current brightness in the projector, and set the current brightness values of the red, green and blue LEDs to the preset values When the brightness value matches, it is determined that the current value of each LED is set correctly, and the determined current value of each LED is output to the test terminal 100 to record the current value of the red, green and blue LEDs under the current brightness, and through the data collection
  • the burning board 300 is burned to the memory of the optical machine of the projector to be tested, so as to realize the intelligent test of the optical machine of the projector.
  • the invention improves the intelligence of the optical and mechanical test of the projector, does not require manual operation, and solves the problem that the intelligence of the optical and mechanical test of
  • the data acquisition and burning board 300 is further configured to determine whether the current value of each LED is current according to the current brightness value when the current brightness value does not match the preset brightness value Adjustable, and output current value adjustment trigger signal/projector optical machine abnormality detection signal;
  • the test terminal 100 is further configured to control the optical machine test platform 200 to adjust the red, green, and blue LEDs of the optical machine of the projector to be tested when the current value of each LED is currently adjustable. Current value
  • the abnormality detection signal of the projector optical machine is burned to the memory of the projector optical machine to be tested through the data acquisition and burning board 300.
  • the data acquisition board will determine whether the current value of the current dimmer LED is adjusted according to the difference between the acquired current brightness value of each LED and the preset brightness value, and according to the current current value of each LED After exceeding its maximum withstand current value and whether the brightness value of the brighter LED is within the preset brightness value range, to determine whether the current value of each LED is adjustable, the test terminal 100 outputs a corresponding current value adjustment control command to adjust each color The specific gravity of the current value of the LED.
  • the current value of the red LED when the brightness of the red LED is darker than the brightness of the other two color LEDs, the current value of the red LED does not exceed its maximum withstand value, and the brightness values of the blue LED and the green LED are not lower than their preset brightness values, then The current value of the red, green and blue LEDs can be adjusted to brighten the brightness of the red LED, or the brightness of the blue LED and the green LED can be dimmed to make the brightness of the red, green and blue LEDs consistent.
  • the test terminal 100 uses the NG information of the optical machine through the data acquisition and burning board 300 burns into the optical machine body to avoid the shipment of NG products.
  • the data acquisition and programming board 300 can calculate the difference between the acquired brightness value and the preset brightness value, and then calculate the current adjustment value according to the brightness difference, and then calculate the current adjustment value according to the current adjustment value,
  • the current value of the LED and the preset current value are used to determine whether the current value of each LED is adjustable. Or, when it is determined that the brightness value of any one of the red, green and blue LEDs is less than the preset brightness value, and the current current value of the LED that needs to be adjusted is less than the preset current value, the test terminal 100 is triggered to adjust the brightness of the LED, and During this process, the brightness and current value of the three LEDs are monitored. When the current value of the three LEDs is greater than the preset current value, or the brightness value decreases to the preset brightness value, the test terminal 100 is triggered to stop the test.
  • the data acquisition and burning board 300 is further configured to obtain the adjusted brightness value of the projector optical machine
  • the adjusted brightness value of the projector optical machine matches the preset brightness value, it is determined that the current value of each LED is set correctly, and the adjusted current value of the LED is output to the test terminal 100;
  • the adjusted brightness value of the projector optical machine matches the preset brightness value, and the current current value of the red, green, and blue LEDs is less than the preset current value, it is determined that the current value of each LED is set correctly and recorded
  • the current value of the LED is adjusted, it is determined that the current value of each LED is set correctly, and the current value of the adjusted LED is output to the test terminal 100.
  • test terminal 100 outputs a corresponding current value adjustment control instruction, and after adjusting the current value of each color LED, the data acquisition and programming board 300 will collect the adjusted brightness value again, and compare the adjusted brightness value with the preset value. Set the brightness value for comparison.
  • the data acquisition and programming board 300 When the adjusted brightness value reaches the preset value and does not exceed its maximum current value, that is, when it is less than the preset current value, it is determined that the current value of each LED is set correctly, and the data acquisition and programming board 300 will re-record the red.
  • the brightness and current values of the green and blue LEDs are burned into the optical engine body through the data acquisition and burn board 300.
  • the projector optical machine abnormality detection signal is output to the test terminal 100.
  • the NG information of this optical machine is burned to the optical machine body through the data acquisition and burning board 300 to avoid the shipment of NG products.
  • the data acquisition and programming board 300 includes a current transformer (310A, 310B, 310C), a signal conversion circuit 320, and a main controller 330.
  • the current transformer corresponds to The red, green and blue LEDs are arranged, the output terminal of the current transformer is connected to the input terminal of the signal conversion circuit 320, and the output terminal of the signal conversion circuit 320 is connected to the input terminal of the main controller 330.
  • the number of current transformers is three, which are respectively marked as 310A, 310B, and 310C, which correspond to each other.
  • Three current transformers are set corresponding to the red, green, and blue LEDs of the optical machine to detect the current flowing through the three LEDs, and convert the detected current signal into a voltage signal of corresponding size, and then output to the signal conversion circuit 320 for signal conversion
  • the circuit 320 amplifies, filters, and performs peak protection processing on the voltage signal and outputs it to the main controller 330.
  • the current transformer can be realized by adopting an open-type current transformer.
  • the open-ended current transformer samples the current in the wire to facilitate the production line to perform nondestructive measurement of the LED current of the DLP projector without damaging the test equipment.
  • the main controller 330 determines whether the current value settings of the optical engine are correct according to the three pulse signals and the acquired brightness.
  • the filter module in the amplifying filter circuit 321 may be an active or passive filter, and the active filter can be selected in this embodiment.
  • the main controller 330 may be implemented by a microprocessor such as STM32, and the main controller 330 may communicate with the test terminal 100 through a communication interface such as USB, and control the entire test process according to the instructions of the test terminal 100.
  • the main controller 330 is also used to control the peak holding circuit 322 to maintain the peak value of the pulse voltage signal of the front end or clear it.
  • the signal conversion circuit 320 includes amplifying and filtering circuits (321A, 321B, 321C), filters (U1A, U1B, U1C) and peak holding circuits (322A, 322B, 322C) , And voltage follower (323A, 323B, 323C), the input end of the amplifying and filtering circuit 321 is the input end of the signal conversion circuit 320; the output end of the amplifying and filtering circuit 321 is connected to the filter U1
  • the input terminal of the peak hold circuit 322 is connected, and the output terminal of the peak hold circuit 322 is connected with the input terminal of the voltage follower 323; the output terminal of the voltage follower 323 is the output terminal of the signal conversion circuit 320 .
  • the signal amplifying circuit in the amplifying and filtering circuit 321 amplifies the signal, and filters out the clutter signal in the voltage signal to reduce the influence of pulse overshoot and ringing on the subsequent circuit. After amplifying the voltage signal, it is output to the main controller 330.
  • the filter module in the amplifying filter circuit 321 may be an active or passive filter, and the active filter can be selected in this embodiment.
  • the voltage follower 323 can realize impedance changes, and transmit the output voltage of the previous stage to the subsequent circuit without influence.
  • the peak hold circuit 322 maintains or clears the high level value of the pulse voltage signal output by the amplifying and filtering circuit 321 under the control of the main controller 330, such as FPGA/CPLD.
  • FIG. 7 is a conversion process diagram of the signal conversion circuit 320, and the specific signal conversion process is:
  • the pulse voltage signal S0 output by the current transformer is amplified, filtered and filtered, and the voltage signal S1 is output.
  • the relationship between the S0 signal and S1 is:
  • K is a constant
  • the output signal is S2.
  • the relationship between the S2 signal and the S1 signal is:
  • t1 is the peak hold time of the peak hold circuit 322
  • t2 is the LED peak voltage sampling time
  • t3 is the discharge time of the peak hold circuit 322.
  • the projector optical-mechanical test system further includes:
  • the first communication port (not shown in the figure) is configured to realize the communication connection between the test terminal 100 and the main controller 330;
  • the second communication port (not shown in the figure) is configured to realize the memory of the main controller 330 and the optical machine of the projector under test.
  • the first communication port may be a mini USB interface or a TypeC interface
  • the test terminal 100 and the main controller 330 may be communicatively connected through the first communication port.
  • the second communication port can be an IIC/SPI interface
  • the main controller 330 is in communication connection with the memory EPROM of the optical machine under test.
  • the test terminal 100 can output the current value signal or NG information through the first communication port After reaching the main controller 330 of the data acquisition and burning board 300, the data is burned into the memory EEPROM of the projector optical machine through the second communication port.
  • the IIC/SPI interface can be integrated in the main controller 330STM32.
  • the invention also provides a method for testing the optical and mechanical projectors.
  • the optical and mechanical test method of the projector includes:
  • Step S100 drive the projector optical machine to work, and obtain the current brightness value, the color LED degree value of the projector optical machine, and the current value of the LED under the current brightness of the projector optical machine;
  • the current value data of the LED drive current is an important parameter tested and recorded by the production line.
  • adjusting the brightness of the DLP projector it can be achieved by adjusting the current value of the red, green and blue LED drive current.
  • Step S200 When the current brightness values of the red, green and blue LEDs all match the preset brightness values, it is determined that the current setting of each LED is correct, and the current value of each LED under the current brightness is recorded.
  • the current brightness value matches the preset brightness value.
  • the current brightness values of the three-color LEDs all match the preset brightness values, and it can be determined that the current value of each LED is set correctly.
  • the current value of the red, green and blue LEDs under the current brightness of the light machine can be burned into the light machine body to record the red, green and blue colors LED drive current value.
  • the method further includes:
  • Step S310 When the current brightness value does not match the preset brightness value, determine whether the current value of each LED is adjustable according to the current brightness value and the preset current value of the red, green and blue LEDs, and output a current adjustment trigger signal/ The abnormal detection signal of the projector optical machine;
  • Step S320 When the current value of each LED is currently adjustable, adjust the current value of the red, green and blue LEDs of the optical machine of the projector to be tested according to the current adjustment trigger signal;
  • the brightness of one of the color LEDs is too dark, or the brightness of one of the color LEDs is too bright, making the brightness of the three color LEDs inconsistent, causing the current
  • the brightness has not reached the preset brightness.
  • the brightness of the red LED is darker than the brightness of the blue LED and the green LED as an example, but it is not limited to this embodiment.
  • the brightness of the red LED is darker than the brightness of the blue LED and the green LED among the obtained red, green and blue LEDs, you can increase the current value of the red LED, and/or decrease the red, green and blue of the green LED and the blue LED.
  • the current values of the three-color LEDs are used to adjust the brightness of the red, green and blue LEDs to be consistent or substantially consistent. And in this process, it is necessary to ensure that the brightness of the blue LED and the green LED are within the preset brightness range, or the current value of the red LED does not exceed its maximum current value, to brighten the brightness of the red LED.
  • the brightness of the blue LED and/or the green LED is dimmed until the three color LEDs all reach the preset brightness value, and the brightness of the three is the same or basically the same.
  • Step S330 When the current value of any one of the red, green, and blue LEDs is not adjustable, record the optical-mechanical abnormality detection signal of the projector.
  • the current adjustment value of the red LED will be adjusted when the brightness of the red LED is dimmed and the brightness of the blue LED and/or green LED is dimmed.
  • the maximum current value range is exceeded, or the brightness value of the blue LED and the green LED is lower than the preset brightness value, it can be determined that the current value of the optical machine is not adjustable at this time.
  • Step S321 Obtain the adjusted brightness value of the projector optical machine
  • Step S322 When the adjusted brightness value of the projector optical machine matches the preset brightness value, and the current current value of the red, green and blue LEDs is less than the preset current value, determine the current value setting of each LED Correct, and record the adjusted LED current value;
  • Step S323 When the brightness value of any one of the red, green and blue LEDs after adjustment does not match the preset brightness value, it is determined that the current value of each LED is set incorrectly, and the projector optical machine abnormality detection is output Signal to the test terminal.
  • the test terminal burns the NG information of the optical machine to the optical machine body through the data acquisition and burning board to avoid the shipment of NG products.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

一种投影仪光机测试系统及方法，该投影仪光机测试系统，包括：测试终端（100），被配置为在测试时，输出电流控制信号；光机测试平台（200），被配置为供待测投影仪光机放置，并根据电流控制信号，驱动待测投影仪光机工作；数据采集烧录板（300），被配置为获取待测投影仪光机的当前亮度值及当前亮度下投影仪光机中红绿蓝三色LED的电流值，并在所述红绿蓝三色LED当前亮度值均与预设亮度值匹配时，确定各LED的电流设置正确；测试终端（100），还被配置记录当前亮度下红绿蓝三色LED的电流值，并通过数据采集烧录板（300）烧录至待测投影仪光机的存储器。提高了投影仪光机测试的智能化，无需人工操作，解决了投影仪光机测试智能化低不方便作业员造作，且容易出现记录错误的问题。

Description

投影仪光机测试系统及方法 技术领域
本发明涉及电子电路技术领域，特别涉及一种投影仪光机测试系统及方法。
背景技术
目前，投影仪光机的测试方法通常是采样电流探头+示波器+PC机+烧录器的方案。然而，该测试方法需要人工读取数据，并做记录，将记录的数据导入至PC机，再通过PC机烧录至烧录器，需要人为操作，智能化低不方便作业员造作，且容易出现记录错误的问题。
发明内容
本发明的主要目的是提出一种投影仪光机测试系统及方法，旨在提高投影仪光机测试的智能化。
为实现上述目的，本发明提出一种投影仪光机测试系统，包括：
测试终端，被配置为在测试时，输出电流控制信号；
光机测试平台，被配置为供待测投影仪光机放置，并根据所述电流控制信号，驱动待测投影仪光机工作；
数据采集烧录板，被配置为获取待测投影仪光机的当前亮度值及当前亮度下投影仪光机中红绿蓝三色LED的电流值，并在所述红绿蓝三色LED当前亮度值均与预设亮度值匹配时，确定各LED的电流设置正确；
所述测试终端，还被配置记录当前亮度下所述红绿蓝三色LED的电流值，并通过所述数据采集烧录板烧录至待测投影仪光机的存储器。
可选地，所述数据采集烧录板，还配置为在当前亮度值与预设亮度值不匹配时，根据当前亮度值和所述红绿蓝三色LED的预设电流值确定当前各LED的电流是否可调，并输出电流调节触发信号/投影仪光机异常检测信号；
所述测试终端，还被配置为在当前各LED的电流可调时，根据所述电流 调节触发信号控制所述光机测试平台调节所述红绿蓝三色LED中对应的LED的电流值；
在所述红绿蓝三色LED中任意一个LED的电流值不可调时，将所述投影仪光机异常检测信号通过所述数据采集烧录板烧录至待测投影仪光机的存储器。
可选地，所述数据采集烧录板，还配置为获取调节后的所述投影仪光机的亮度值；
在调节后的所述投影仪光机的亮度值与预设亮度值匹配，且所述红绿蓝三色LED的当前电流值小于预设电流值时，则确定各LED的电流值设置正确，并输出调节后的LED的电流值至所述测试终端；
在调节后的所述红绿蓝三色LED中任意一个LED的亮度值与预设亮度值不匹配时，则确定各LED的电流值设置不正确，并输出投影仪光机异常检测信号至所述测试终端。
可选地，所述数据采集烧录板包括电流互感器、信号转换电路及主控制器，所述电流互感器对应所述红绿蓝三色LED设置，所述电流互感器的输出端与所述信号转换电路的输入端连接，所述信号转换电路的输出端与所述主控制器的输入端连接。
可选地，所述信号转换电路包括放大滤波电路、滤波器、峰值保持电路及电压跟随电器，所述放大滤波电路的输入端为所述信号转换电路的输入端；所述放大滤波电路的输出端经所述滤波器与所述峰值保持电路的输入端连接，所述峰值保持电路的输出端与所述电压跟随器的输入端连接；所述电压跟随器的输出端为所述信号转换电路的输出端。
可选地，所述投影仪光机测试系统还包括：
第一通讯端口，被配置为实现所述测试终端与所述主控制器的通讯连接。
可选地，所述投影仪光机测试系统还包括：
第二通讯端口，被配置为实现所述主控制器与待测投影仪光机的存储器。
本发明还提出一种投影仪光机测试方法，所述投影仪光机测试方法包括：
驱动投影仪光机工作，并获取投影仪光机的当前亮度值及当前亮度下投影仪光机中红绿蓝三色LED的电流值；
在所述红绿蓝三色LED当前亮度值均与预设亮度值匹配时，确定各LED的电流设置正确。
可选地，在所述驱动投影仪光机工作，并获取投影仪光机的当前亮度值及投影仪光机中当前亮度下LED的电流值的步骤之后还包括：
在当前亮度值与预设亮度值不匹配时，根据当前亮度值和所述红绿蓝三色LED的预设电流值确定当前各LED的电流值是否可调，并输出电流调节触发信号/投影仪光机异常检测信号；
在当前各LED的电流值可调时，根据所述电流调节触发信号调节待测投影仪光机的红绿蓝三色LED的电流值；
在所述红绿蓝三色LED中任意一个LED的电流值不可调时，记录所述投影仪光机异常检测信号。
可选地，在所述在当前各LED的电流值可调时，根据所述电流调节触发信号调节待测投影仪光机的红绿蓝三色LED的电流值的步骤之后还包括：
获取调节后的所述投影仪光机的亮度值；
在调节后的所述投影仪光机的亮度值与预设亮度值匹配，且所述红绿蓝三色LED的当前电流值小于预设电流值时，则确定各LED的电流值设置正确，并记录调节后的LED的电流值；
在调节后的所述红绿蓝三色LED中任意一个LED的亮度值与预设亮度值不匹配时，则确定各LED的电流值设置不正确，并输出投影仪光机异常检测信号至所述测试终端。
本发明通过设置测试终端，并在测试时，输出电流控制信号，以使光机测试平台根据所述电流控制信号，驱动待测投影仪光机工作，同时还设置有数据采集烧录板，并获取待测投影仪光机的当前亮度值及投影仪光机中当前亮度下红绿蓝三色LED的电流值，并在所述红绿蓝三色LED当前亮度值均与预设亮度值匹配时，确定各LED的电流值设置正确，并将确定的各LED的电流值输出至测试终端，以记录当前亮度下红绿蓝三色LED的电流值，并通过所述数据采集烧录板烧录至待测投影仪光机的存储器，从而实现对投影仪光机的智能测试。本发明提高了投影仪光机测试的智能化，无需人工操作，解决了投影仪光机测试智能化低不方便作业员造作，且容易出现记录错误的问 题。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本发明投影仪光机测试系统一实施例的功能模块示意图；
图2为本发明投影仪光机测试系统一实施例的电路结构示意图；
图3为本发明投影仪光机测试系统中测试终端一实施例的结构示意图；
图4为本发明投影仪光机测试方法一实施例的流程示意图；
图5为本发明投影仪光机测试方法另一实施例的流程示意图；
图6为本发明投影仪光机测试方法又一实施例的流程示意图；
图7为本发明投影仪光机测试系统中，信号转换电路的转换过程图。
附图标号说明：
标号 名称 标号 名称
100 测试终端 320 信号转换电路
200 光机测试平台 330 主控制器
300 数据采集烧录板 321A、321B、321C 放大滤波电路
310A、310B、310C 电流互感器 322A、322B、322C 峰值保持电路
323A、323B、323C 电压跟随器    
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有 作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，若本发明实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本发明实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明提出一种投影仪光机测试系统。
在投影仪光机中，通常设置有LED光源、聚光镜、透镜等结构，而LED源通常采用RGB红绿蓝三色LED来实现，由于RGB红绿蓝三色LED本体之间的差异，每台投影仪的中RGB各LED驱动电流的电流值不同，因此需要对投影光机的LED电流值及设定的亮度数据进行调节，并记录调整后LED电流值及亮度数据。而目前投影仪光机的测试方法通常是采样电流探头+示波器+PC机+烧录器的方案。示波器连接三路电流探头分别测试RGB红绿蓝三色LED中通过的电流，示波器显示并记录测试数据，PC机通过USB/串口/以太网等端口读取测试数据并记录，烧录器将测试数据烧录到光机本体，以供整机厂商使用。然而，该测试方法需要人工读取数据，并做记录，将记录的数据导入至PC机，再通过PC机烧录至烧录器，需要人为操作，智能化低不方便作业员造作，且容易出现记录错误的问题。
参照图1和图2，在本发明一实施例中，该投影仪光机测试系统包括：
测试终端100，被配置为在测试时，输出电流控制信号；
光机测试平台200，被配置为供待测投影仪光机放置，并根据所述电流控制信号，驱动待测投影仪光机工作；
数据采集烧录板300，被配置为获取待测投影仪光机的当前亮度值及投影 仪光机中当前亮度下红绿蓝三色LED的电流值，并在所述红绿蓝三色LED当前亮度值均与预设亮度值匹配时，确定各LED的电流设置正确；
所述测试终端100，还被配置记录当前亮度下红绿蓝三色LED的电流值，并通过所述数据采集烧录板300烧录至待测投影仪光机的存储器。
本实施例中，测试终端100可以是PC，也可以是智能手机、平板电脑、电子书阅读器、便携计算机等终端设备。
如图3所示，该终端可以包括：处理器101，例如CPU，网络接口104，用户接口103，存储器105，通信总线102。其中，通信总线102用于实现这些组件之间的连接通信。用户接口103可以包括显示屏(Display)、输入单元比如键盘(Keyboard)，可选用户接口103还可以包括标准的有线接口、无线接口。网络接口104可选的可以包括标准的有线接口、无线接口(如WI-FI接口)。存储器105可以是高速RAM存储器，也可以是稳定的存储器(non-volatile memory)，例如磁盘存储器。存储器105可选的还可以是独立于前述处理器101的存储装置。
光机测试平台200用于供待测光机放置及固定，并在对待测光机进行测试时，根据测试终端100输出的控制信号，驱动待测光机工作，以完成对待测光机的测试。
可以理解的是，在所述红绿蓝三色LED工作时，在一个工作周期内红绿蓝三色LED按照一定的顺序轮流点亮，由于红绿蓝三色LED自身的差异，在相同亮度下，驱动LED工作的电流值大小可能不同。LED驱动电流的电流值数据是产线测试并记录的重要参数，在调节DLP投影仪亮度时，可以通过调整红绿蓝三色LED驱动电流的电流值来实现。
具体地，在对DLP投影仪进行测试时，测试终端100可以先给光机测试平台200发送一电流值控制指令，也即电流控制信号，光机测试平台200则可以根据该电流值控制指令，输出对应的电流值，从而驱动光机工作。此时数据采集烧录板300会获取光机的实际亮度以及此时驱动光机工作的电流值，数据采集烧录板300根据采集的光机实际亮度，以及投影仪光机中当前亮度下红绿蓝三色LED的电流值，来确定各LED当前亮度值与预设亮度值是否匹配，从而来确定各LED的电流值设置正确。
当获取的红绿蓝三色LED中，红色LED的亮度、蓝色LED和绿色LED 的亮度一致或者基本一致，从而可以确定当前亮度值与预设亮度值匹配，红绿蓝三色LED当前亮度值均与预设亮度值匹配，则可以确定各LED的电流值设置正确。
当获取的红绿蓝三色LED中，其中一个颜色的LED的灯亮度偏暗，或者其中一个颜色的LED的灯亮度偏亮，而使得三个颜色的LED的亮度不一致，也即当前亮度未达到预设亮度。以下实施例以红色LED的亮度较蓝色LED和绿色LED的亮度暗为例进行说明，但不局限于该实施例。
若获取的红绿蓝三色LED中，红色LED的亮度较蓝色LED和绿色LED的亮度暗，则可以调高红色LED的电流值，和/或调低绿色LED、蓝色LED红绿蓝三色LED的电流值，以将红绿蓝三色LED亮度调节成一致或者基本一致。并且在这个过程中，需要保证蓝色LED和绿色LED的亮度在预设亮度范围内，或者红色LED的电流值未超过其最大承受的电流值的前提下，来将红色LED的亮度调亮，而将蓝色LED和/或绿色LED的亮度调暗，直至三者的颜色LED均达到预设亮度值，且三者的亮度一致或者基本一致。
若红色LED的亮度较蓝色LED和绿色LED的亮度暗，然而由于将红色LED的亮度调亮，而将蓝色LED和/或绿色LED的亮度调暗的过程中，红色LED的电流调节值超过其最大承受的电流值范围，或者蓝色LED和绿色LED的亮度值低于预设亮度值时，则可以确定此时光机的电流值不可调。
数据采集烧录板300会根据检测数据，向测试终端100反馈相应的检测结果，以使测试终端100根据检测结果动作。具体地，在确定红绿蓝三色LED中各LED的电流值设置正确时，测试终端100则会将数据采集烧录板300反馈的光机当前亮度及色LED度下，红绿蓝三色LED的电流值通过数据采集烧录板300烧录至光机本体中。在确定各红绿蓝三色LED中有LED的电流值设置不正确，但光机的电流值可调时，则可以根据采集烧录板确定的调节比例，输出相应的电流值调节控制指令。光机测试平台200则可以根据该电流值调节控制指令，输出对应的电流值，从而驱动光机工作，并改变光机的当前亮度，直至光机各个LED的亮度达到预设亮度。此时数据采集烧录板300会重新记录红绿蓝三色LED的亮度和电流值，并通过数据采集烧录板300烧录至光机本体中。而在确定红绿蓝三色LED中各LED的电流值设置不正确，且光机的电流值不可调时，测试终端100将此光机的NG信息通过数据采集烧录 板300烧录到光机本体，避免NG品出货。
本发明通过设置测试终端100，并在测试时，输出电流控制信号，以使光机测试平台200根据所述电流控制信号，驱动待测投影仪光机工作，同时还设置有数据采集烧录板300，并获取待测投影仪光机的当前亮度值及投影仪光机中当前亮度下红绿蓝三色LED的电流值，并在所述红绿蓝三色LED当前亮度值均与预设亮度值匹配时，确定各LED的电流值设置正确，并将确定的各LED的电流值输出至测试终端100，以记录当前亮度下红绿蓝三色LED的电流值，并通过所述数据采集烧录板300烧录至待测投影仪光机的存储器，从而实现对投影仪光机的智能测试。本发明提高了投影仪光机测试的智能化，无需人工操作，解决了投影仪光机测试智能化低不方便作业员造作，且容易出现记录错误的问题。
参照图1和图2，在一实施例中，所述数据采集烧录板300，还配置为在当前亮度值与预设亮度值不匹配时，根据当前亮度值确定当前各LED的电流值是否可调，并输出电流值调节触发信号/投影仪光机异常检测信号；
所述测试终端100，还被配置为在当前各LED的电流值可调时，根据所述电流值信号控制所述光机测试平台200调节待测投影仪光机的红绿蓝三色LED的电流值；
在当前各LED的电流值不可调时，将所述投影仪光机异常检测信号通过所述数据采集烧录板300烧录至待测投影仪光机的存储器。
本实施例中，数据采集板会根据获取到的当前各LED亮度值与预设亮度值之间的差值，并且根据各LED当前的电流值确定当前较暗亮度的LED的电流值调节程度是否超过其最大承受电流值，以及较亮LED的亮度值是否在预设亮度值范围内，以此确定各LED的电流值可调后，测试终端100输出相应的电流值调节控制指令，以调节各色LED的电流值比重。
例如，当红色LED的亮度比其他两个颜色LED的亮度暗时，红色LED的电流值未超过其最大承受值，且蓝色LED和绿色LED的亮度值未低于其预设亮度值，则可以调节红绿蓝三色LED的电流值使红色LED亮度调亮，或者将蓝色LED和绿色LED的亮度调暗使得红绿蓝三色LED的亮度一致。
或者当蓝色LED亮度偏暗，而此时蓝色LED的电流调节值将超过LED 的最大电流值，也即超过其最大承受值，或者红色LED和绿色LED的亮度将低于其预设亮度值，则此时在调节了蓝色LED亮度后，红色LED或者绿色LED的亮度值又会偏暗，而出现新的亮度不均的问题，或者蓝色LED长期工作在大电流下，而容易降低光机的使用寿命，严重时甚至容易损坏光机，且存在安全隐患，以此确定此时各LED的电流值不可调后，测试终端100将此光机的NG信息通过数据采集烧录板300烧录到光机本体，避免NG品出货。
可以理解的是，数据采集烧录板300可以根据获取到的亮度值与预设亮度值，计算两者的差值，再根据亮度差值，计算出电流调节值，然后在根据电流调节值、当前LED的电流值及预设电流值，来确定各LED的电流值是否可调。或者，在确定红绿蓝三色LED中任意一个LED的亮度值小于预设亮度值，且需要调节的该LED的当前电流值小于预设电流值，则触发测试终端100调节LED的亮度，在这个过程中，监测三个LED的亮度和电流值，当三个LED中，出现电流值大于预设电流值，或者在亮度值降低至预设亮度值，则触发测试终端100停止测试。
参照图1和图2，在一实施例中，所述数据采集烧录板300，还配置为获取调节后的所述投影仪光机的亮度值；
在调节后的所述投影仪光机的亮度值与预设亮度值匹配时，则确定各LED的电流值设置正确，并输出调节后的LED的电流值至所述测试终端100；
在调节后的所述投影仪光机的亮度值与预设亮度值匹配，且红绿蓝三色LED的当前电流值小于预设电流值时，则确定各LED的电流值设置正确，并记录调节后的LED的电流值时，则确定各LED的电流值设置正确，输出调节后的LED的电流值至所述测试终端100。
本实施例中，测试终端100输出相应的电流值调节控制指令，并调节各色LED的电流值后，数据采集烧录板300会再次采集调节后的亮度值，并将调节后的亮度值与预设亮度值进行比较。
当调节后的亮度值达到预设，且未超过其最大电流值时，也即小于预设电流值时，则确定各LED的电流值设置正确，此时数据采集烧录板300会重新记录红绿蓝三色LED的亮度和电流值，并通过数据采集烧录板300烧录至光机本体中。
当调节后的亮度值未达到预设，或者超过其中LED的最大电流值时，则确定各LED的电流值设置不正确，并输出投影仪光机异常检测信号至所述测试终端100，测试终端100将此光机的NG信息通过数据采集烧录板300烧录到光机本体，避免NG品出货。
参照图1和图2，在一实施例中，所述数据采集烧录板300包括电流互感器(310A、310B、310C)、信号转换电路320及主控制器330，所述电流互感器对应所述红绿蓝三色LED设置，所述电流互感器的输出端与所述信号转换电路320的输入端连接，所述信号转换电路320的输出端与所述主控制器330的输入端连接。
本实施例中，电流互感器的数量为三个，且分别标记为310A、310B、310C，对应的。三个电流互感器对应光机红绿蓝三个LED设置，以检测流经三个LED的电流，并将检测的电流信号转换为对应大小的电压信号后，输出至信号转换电路320，信号转换电路320将电压信号进行放大、滤波、峰值保护处理后输出至主控制器330。本实施例中，电流互感器可选采用开口型电流互感器来实现，开口电流互感器采样导线中的电流，方便产线对DLP投影仪的LED电流进行无损的测量，无需对测试设备破坏。主控制器330根据三路脉冲信号以及获取到的亮度，来确定光机的各电流值设置是否正确。放大滤波电路321中的滤波模块可以为有源或者无源滤波器，本实施例可选采用的有源滤波器。主控制器330可以采用STM32等微处理器来实现，主控制器330可以通过USB电等通讯接口与测试终端100进行通信，根据测试终端100指令控制整个测试过程。主控制器330还用于控制峰值保持电路322保持前端的脉冲电压信号的峰值或者清零。
参照图1和图2，在一实施例中，所述信号转换电路320包括放大滤波电路(321A、321B、321C)、滤波器(U1A、U1B、U1C)峰值保持电路(322A、322B、322C)、及电压跟随器(323A、323B、323C)，所述放大滤波电路321的输入端为所述信号转换电路320的输入端；所述放大滤波电路321的输出端经所述滤波器U1与所述峰值保持电路322的输入端连接，所述峰值保持电路322的输出端与所述电压跟随器323的输入端连接；所述电压跟随器323 的输出端为所述信号转换电路320的输出端。
本实施例中，放大滤波电路321中的信号放大电路将信号进行放大后，并将将电压信号中的杂波信号进行滤除，以降低脉冲过冲及振铃对后级电路的影响。并对电压信号进行放大后，输出至主控制器330。放大滤波电路321中的滤波模块可以为有源或者无源滤波器，本实施例可选采用的有源滤波器。电压跟随器323可以实现阻抗变化，将前级输出的电压无影响输送到后级电路。峰值保持电路322基于主控制器330，例如FPGA/CPLD的控制下对放大滤波电路321输出的脉冲电压信号的高电平值进行保持或者清零。
参照图7，图7为信号转换电路320的转换过程图，信号转换的过程具体为：
电流互感器输出的脉冲电压信号S0经过放大滤波、滤波后输出电压信号S1，S0信号与S1的关系为：
U S1＝KU S0
其中，K为常数；
电压信号S1经过峰值保持电路322与电压跟随器后输出的信号为S2，S2信号与S1信号的关系为：
U S2＝U S1
t1为峰值保持电路322峰值保持时间，t2为LED峰值电压采样时间，t3为峰值保持电路322放电时间。
参照图1和图2，在一实施例中，所述投影仪光机测试系统还包括：
第一通讯端口(图未示出)，被配置为实现所述测试终端100与所述主控制器330的通讯连接；
第二通讯端口(图未示出)，被配置为实现所述主控制器330与待测投影仪光机的存储器。
本实施例中，第一通讯端口可以是mini USB接口，或者是TypeC接口，测试终端100与主控制器330可以通过第一通讯端口通讯连接。第二通讯端口可以是IIC/SPI接口，主控制器330与待测投影仪光机的存储器EPROM通讯连接，在实际应用时，测试终端100可以将电流值信号或者NG信息通过第一通讯端口输出至数据采集烧录板300的主控制器330后，再通过第二通 讯端口将数据烧录到投影仪光机的存储器EEPROM中。并且，IIC/SPI接口可以集成于主控制器330STM32的内部。
本发明还提出一种投影仪光机测试方法。
参照图4，所述投影仪光机测试方法包括：
步骤S100、驱动投影仪光机工作，并获取投影仪光机的当前亮度值、色LED度值及投影仪光机中当前亮度下LED的电流值；
本实施例中，LED驱动电流的电流值数据是产线测试并记录的重要参数，在调节DLP投影仪亮度时，可以通过调整红绿蓝三色LED驱动电流的电流值来实现。
步骤S200、在所述红绿蓝三色LED当前亮度值均与预设亮度值匹配时，确定各LED的电流设置正确，并记录当前亮度下各LED的电流值。
本实施例中，当获取的红绿蓝三色LED中，红色LED的亮度、蓝色LED和绿色LED的亮度一致或者基本一致，从而可以确定当前亮度值与预设亮度值匹配，红绿蓝三色LED当前亮度值均与预设亮度值匹配，则可以确定各LED的电流值设置正确。在确定红绿蓝三色LED中各LED的电流值设置正确时，可以将光机当前亮度下，红绿蓝三色LED的电流值烧录至光机本体中，以记录红绿蓝三色LED的驱动电流值。
参照图5，在一实施例中，在所述驱动投影仪光机工作，并获取投影仪光机的当前亮度值及投影仪光机中当前亮度下LED的电流值的步骤之后还包括：
步骤S310、在当前亮度值与预设亮度值不匹配时，根据当前亮度值和红绿蓝三色LED的预设电流值确定当前各LED的电流值是否可调，并输出电流调节触发信号/投影仪光机异常检测信号；
步骤S320、在当前各LED的电流值可调时，根据所述电流调节触发信号调节待测投影仪光机的红绿蓝三色LED的电流值；
本实施例中，当获取的红绿蓝三色LED中，其中一个颜色LED的灯亮度偏暗，或者其中一个颜色LED的灯亮度偏亮，而使得三个颜色LED的亮度不一致，而使得当前亮度未达到预设亮度。以下实施例以红色LED的亮度较蓝 色LED和绿色LED的亮度暗为例进行说明，但不局限于该实施例。
若获取的红绿蓝三色LED中，红色LED的亮度较蓝色LED和绿色LED的亮度暗，则可以调高红色LED的电流值，和/或者调低绿色LED、蓝色LED红绿蓝三色LED的电流值，以将红绿蓝三色LED亮度调节成一致或者基本一致。并且在这个过程中，需要保证蓝色LED和绿色LED的亮度在预设亮度范围内，或者红色LED的电流值未超过其最大承受的电流值的前提下，来将红色LED的亮度调亮，而将蓝色LED和/或绿色LED的亮度调暗，直至三者的颜色LED均达到预设亮度值，且三者的亮度一致或者基本一致。
步骤S330、在所述红绿蓝三色LED中任意一个LED的电流值不可调时，记录所述投影仪光机异常检测信号。
若红色LED的亮度较蓝色LED和绿色LED的亮度暗，然而由于将红色LED的亮度调亮，而将蓝色LED和/或绿色LED的亮度调暗的过程中，红色LED的电流调节值超过其最大承受的电流值范围，或者蓝色LED和绿色LED的亮度值低于预设亮度值时，则可以确定此时光机的电流值不可调。
参照图6，在一实施例中，在所述在当前各LED的电流值可调时，根据所述电流值信号调节待测投影仪光机的红绿蓝三色LED的电流值的步骤之后还包括：
步骤S321、获取调节后的所述投影仪光机的亮度值；
步骤S322、在调节后的所述投影仪光机的亮度值与预设亮度值匹配时，且红绿蓝三色LED的当前电流值小于预设电流值时，则确定各LED的电流值设置正确，并记录调节后的LED的电流值；
本实施例中，当调节后各个LED的亮度值均达到预设，且未需要调节的LED的亮度值未超过最大值，则确定各LED的电流值设置正确，此时需要重新记录红绿蓝三色LED的亮度和电流值，并烧录至光机本体中。
步骤S323、在调节后的所述红绿蓝三色LED中任意一个LED的亮度值与预设亮度值不匹配时，则确定各LED的电流值设置不正确，并输出投影仪光机异常检测信号至所述测试终端。
本实施例中，在确定电流值可调，输出相应的电流值调节控制指令，并调节各色LED的电流值，再次采集调节后的亮度值，并将调节后的亮度值与 预设亮度值进行比较，当调节后的亮度值未达到预设，而其中需要调节的LED的电流值达到最大值，则确定各LED的电流值设置不正确，并输出投影仪光机异常检测信号至所述测试终端，测试终端将此光机的NG信息通过数据采集烧录板烧录到光机本体，避免NG品出货。
以上所述仅为本发明的可选实施例，并非因此限制本发明的专利范围，凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (10)

  1. 一种投影仪光机测试系统，其特征在于，包括：
    测试终端，被配置为在测试时，输出电流控制信号；
    光机测试平台，被配置为供待测投影仪光机放置，并根据所述电流控制信号，驱动待测投影仪光机工作；
    数据采集烧录板，被配置为获取待测投影仪光机的当前亮度值及当前亮度下投影仪光机中红绿蓝三色LED的电流值，并在所述红绿蓝三色LED当前亮度值均与预设亮度值匹配时，确定各LED的电流设置正确；
    所述测试终端，还被配置记录当前亮度下所述红绿蓝三色LED的电流值，并通过所述数据采集烧录板烧录至待测投影仪光机的存储器。
  2. 如权利要求1所述的投影仪光机测试系统，其特征在于，所述数据采集烧录板，还配置为在当前亮度值与预设亮度值不匹配时，根据当前亮度值和红绿蓝三色LED的预设电流值确定当前各LED的电流是否可调，并输出电流调节触发信号/投影仪光机异常检测信号；
    所述测试终端，还被配置为在当前各LED的电流可调时，根据所述电流调节触发信号控制所述光机测试平台调节所述红绿蓝三色LED中对应的LED的电流值；
    在所述红绿蓝三色LED中任意一个LED的电流值不可调时，将所述投影仪光机异常检测信号通过所述数据采集烧录板烧录至待测投影仪光机的存储器。
  3. 如权利要求2所述的投影仪光机测试系统，其特征在于，所述数据采集烧录板，还配置为获取调节后的所述投影仪光机的亮度值；
    在调节后的所述投影仪光机的亮度值与预设亮度值匹配，且所述红绿蓝三色LED的当前电流值小于预设电流值时，则确定各LED的电流值设置正确，并输出调节后的LED的电流值至所述测试终端；
    在调节后的所述红绿蓝三色LED中任意一个LED的亮度值与预设亮度值不匹配时，则确定各LED的电流值设置不正确，并输出投影仪光机异常检 测信号至所述测试终端。
  4. 如权利要求1所述的投影仪光机测试系统，其特征在于，所述数据采集烧录板包括电流互感器、信号转换电路及主控制器，所述电流互感器对应所述红绿蓝三色LED设置，所述电流互感器的输出端与所述信号转换电路的输入端连接，所述信号转换电路的输出端与所述主控制器的输入端连接。
  5. 如权利要求4所述的投影仪光机测试系统，其特征在于，所述信号转换电路包括放大滤波电路、滤波器、峰值保持电路及电压跟随电器，所述放大滤波电路的输入端为所述信号转换电路的输入端；所述放大滤波电路的输出端经所述滤波器与所述峰值保持电路的输入端连接，所述峰值保持电路的输出端与所述电压跟随器的输入端连接；所述电压跟随器的输出端为所述信号转换电路的输出端。
  6. 如权利要求4所述的投影仪光机测试系统，其特征在于，所述投影仪光机测试系统还包括：
    第一通讯端口，被配置为实现所述测试终端与所述主控制器的通讯连接。
  7. 如权利要求4所述的投影仪光机测试系统，其特征在于，所述投影仪光机测试系统还包括：
    第二通讯端口，被配置为实现所述主控制器与待测投影仪光机的存储器。
  8. 一种投影仪光机测试方法，其特征在于，所述投影仪光机测试方法包括：
    驱动投影仪光机工作，并获取投影仪光机的当前亮度值及当前亮度下投影仪光机中的红绿蓝三色LED的电流值；
    在所述红绿蓝三色LED当前亮度值均与预设亮度值匹配时，确定各LED的电流设置正确。
  9. 如权利要求8所述的投影仪光机测试方法，其特征在于，在所述驱动 投影仪光机工作，并获取投影仪光机的当前亮度值及投影仪光机中当前亮度下LED的电流值的步骤之后还包括：
    在当前亮度值与预设亮度值不匹配时，根据当前亮度值和所述红绿蓝三色LED的预设电流值确定当前各LED的电流值是否可调，并输出电流调节触发信号/投影仪光机异常检测信号；
    在当前各LED的电流值可调时，根据所述电流调节触发信号调节待测投影仪光机的红绿蓝三色LED的电流值；
    在所述红绿蓝三色LED中任意一个LED的电流值不可调时，记录所述投影仪光机异常检测信号。
  10. 如权利要求9所述的投影仪光机测试方法，其特征在于，在所述在当前各LED的电流值可调时，根据所述电流调节触发信号调节待测投影仪光机的红绿蓝三色LED的电流值的步骤之后还包括：
    获取调节后的所述投影仪光机的亮度值；
    在调节后的所述投影仪光机的亮度值与预设亮度值匹配，且所述红绿蓝三色LED的当前电流值小于预设电流值时，则确定各LED的电流值设置正确，并记录调节后的LED的电流值；
    在调节后的所述红绿蓝三色LED中任意一个LED的亮度值与预设亮度值不匹配时，则确定各LED的电流值设置不正确，并输出投影仪光机异常检测信号至所述测试终端。
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