WO2017181507A1 - 灯条光衰检测方法、装置和系统 - Google Patents
灯条光衰检测方法、装置和系统 Download PDFInfo
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- WO2017181507A1 WO2017181507A1 PCT/CN2016/084979 CN2016084979W WO2017181507A1 WO 2017181507 A1 WO2017181507 A1 WO 2017181507A1 CN 2016084979 W CN2016084979 W CN 2016084979W WO 2017181507 A1 WO2017181507 A1 WO 2017181507A1
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- WIPO (PCT)
- Prior art keywords
- light
- tested
- strip
- light bar
- brightness
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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
- G01M11/02—Testing optical properties
-
- 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
- G01R31/44—Testing lamps
Definitions
- the present invention relates to the field of backlight detection technologies, and in particular, to a method, device and system for detecting light bar light decay.
- LED light-emitting diode, LED backlight technology
- LED has the advantages of long life, energy saving and easy driving.
- LED backlight schemes There are two kinds of LED backlight schemes: one is direct type, and several LED lights are directly placed under the LCD screen; the other is side-in type, and several LED lights are distributed around the periphery of the LCD screen, and the light is evenly distributed through the light guide plate.
- LED lights are usually connected in series, and then several strings are driven by one to several constant current driving chips, and the driving is generally realized by a constant current source.
- the LED backlight scheme has the advantages of low power consumption and long life.
- the LED lamp chip has different ability to withstand current, the phosphor used is different, the material of the bracket is different, and the ambient temperature of the LED lamp is affected. Different from humidity, the light decay and service life of LED lamps will be affected to varying degrees. Therefore, verifying the light decay of backlights is an important part of LCD TV design and production.
- TV backlight first install the LED light on the light bar, then fix the LED light bar on the heat sink, and rely on the heat sink to dissipate heat to the LED light.
- test method is based on an integrating sphere.
- the test method is as follows:
- the LED light bar is placed in the integrating sphere, and the LED light bar is powered by the power source external to the integrating sphere, and the initial total light of the LED light bar is measured and recorded;
- the tested LED light strip is taken out, and the LED light strip is pasted on the heat sink with a heat-conductive double-sided tape, and then sent to a high-temperature 80-degree incubator, and energized for 1000 hours of aging test;
- the LED strip with the heat sink is taken out from the incubator, and the LED strip and the heat sink are separated by a small knife;
- the traditional LED lamp test light attenuation method requires the use of an expensive and inconvenient integrating sphere, and the large-sized LED light bar cannot be placed in the integrating sphere. If a large-sized integrating sphere is used, the price is more expensive and takes up the place. Therefore, the conventional light decay test method has technical problems of high test cost and complicated operation.
- the main object of the present invention is to provide a method, a device and a system for detecting light bar light fading, which aim to solve the technical problem that the method for detecting light fading of a light bar is expensive and complicated in operation.
- the present invention also provides a light bar light failure detecting method, which is based on a light bar light decay detecting system, the system comprising a light bar to be tested, a color analyzer and a support frame, the light bar assembly to be tested In the support frame, the color analyzer comprises an optical probe and an analysis device electrically connected to each other, and the analysis device receives the brightness value collected by the light probe, and the light bar light attenuation detection method comprises:
- the support frame is further provided with a light-reducing film
- the light-reducing film is located in the light-emitting direction of the light-emitting strip to be tested, and the light emitted by the light-emitting strip to be tested forms a smooth surface on the light-reducing film.
- the step of measuring the brightness of the light bar to be tested based on the optical probe to obtain the first brightness value of the light bar to be tested includes:
- the step of obtaining the second brightness value of the light bar to be tested after the brightness of the light bar to be tested after the preset light bar aging test is performed by the optical probe comprises:
- the brightness value is used as the second brightness value after the aging experiment.
- the support frame is further provided with a heat sink, and the light strip to be tested is disposed on the heat sink, and the step of performing the preset aging test on the light strip to be tested includes:
- the heat sink provided with the light strip to be tested is taken out and placed in an external thermostat for a preset period of time, wherein the temperature in the incubator is constant at a preset temperature;
- the strip to be tested taken out from the incubator is remounted to the support frame.
- the present invention also provides a light strip light decay detecting device, which is based on a light strip light decay detecting system, the system comprising a light strip to be tested, a color analyzer and a support frame, the light strip assembly to be tested In the support frame, the color analyzer includes an optical probe and an analysis device electrically connected to each other, and the analysis device receives the brightness value collected by the light probe, and the light bar light failure detecting device comprises:
- a first acquiring module configured to measure, according to the optical probe, a brightness of the light bar to be tested, to obtain a first brightness value of the light bar to be tested;
- An aging experiment module configured to perform a preset aging test on the light bar to be tested
- a second obtaining module configured to obtain, according to the brightness of the light bar to be tested after the aging test, the second brightness value of the light bar to be tested;
- a light attenuation calculation module configured to calculate, according to the first brightness value and the second brightness value, the light decay of the light bar to be tested.
- the support frame is further provided with a light-reducing film, the light-reducing film is located in the light-emitting direction of the light-emitting strip to be tested, and the light emitted by the light-emitting strip to be tested forms a smooth surface on the light-reducing film.
- the first obtaining module includes:
- a marking unit configured to mark a plurality of detection areas on the light emitting surface
- a first acquiring unit configured to control the light probe to measure the brightness of the light emitted by the light strip to be tested in the detection area one by one, and obtain the current average brightness value of the light strip to be tested according to the brightness measured by all the probes, The average luminance value is taken as the first luminance value.
- the second obtaining module comprises:
- a second acquiring unit configured to control, by the optical probe, the brightness of the light emitted by the light strip to be tested after the aging test in the detection area, and determine the aging test according to the brightness measured by all the probes
- the average brightness value of the light bar to be measured is described, and the average brightness value after the aging test is taken as the second brightness value.
- the aging experiment module comprises:
- a take-out unit configured to take out the heat sink provided with the light strip to be tested and put it into an external thermostat for a preset period of time, wherein the temperature in the incubator is constant at a preset temperature
- the present invention provides a light strip light decay detecting system, the light strip light decay detecting system comprising a light bar assembly and a color analyzer, the light bar assembly comprising a support frame, a light strip to be tested and a heat dissipation
- the light bar to be tested is disposed on the heat sink
- the color analyzer includes an optical probe and an analysis device electrically connected to each other, the light probe detects brightness of light emitted by the light strip to be tested, and the analyzing device The light decay of the light strip to be tested is obtained based on the brightness of the multiple detections.
- the light bar assembly further includes a light reducing film disposed in a light emitting direction of the light bar to be tested, and the light reducing film is connected to the support frame.
- the light-reducing film has a light transmittance of 3% to 10%.
- the light bar assembly further comprises a front transparent panel and a light guide plate.
- the front transparent panel, the light-reducing film and the light guide plate are sequentially stacked, the front transparent panel is disposed at the outermost side of the support frame, and the light bar to be tested is disposed on the light guide plate. Sideways or away from the back of the dimming film.
- the light bar assembly further comprises a reflective sheet disposed behind the light guide plate in a direction away from the light guide plate.
- the heat sink is disposed behind the reflective sheet, and the light head to be tested is fixed on the heat sink by a double-sided thermal conductive tape.
- the heat sink has an L-shaped design.
- the invention measures the brightness of the light bar to be tested by the optical probe to obtain a first brightness value of the light bar to be tested; and then performs a preset aging test on the light bar to be tested;
- the probe measures the brightness of the light bar to be tested after the preset light bar aging test to obtain the second brightness value of the light bar to be tested; finally, according to the first brightness value and the second brightness value, Calculating the light fading of the light strip to be tested, so that the detection of the light fading of the light strip does not require the use of an expensive and bulky integrating sphere, and the light fading of the light strip can be detected by using a common equipment color analyzer.
- FIG. 1 is a schematic diagram of a scene of an embodiment of a light bar light attenuation detecting system according to the present invention
- FIG. 2 is a schematic side view showing the internal side view of an embodiment of a light bar assembly of the light bar light decay detecting system of the present invention
- FIG. 3 is a schematic diagram showing the internal rear view of an embodiment of a light bar assembly of a light bar light decay detecting system of the present invention
- FIG. 4 is a schematic flow chart of a first embodiment of a method for detecting light fading of a light bar according to the present invention
- FIG. 5 is a schematic flow chart of a second embodiment of a method for detecting light fading of a light bar according to the present invention.
- FIG. 6 is a schematic flowchart showing the steps of performing a preset aging test on the light bar to be tested in the third embodiment of the method for detecting light bar light decay of the present invention
- FIG. 7 is a schematic diagram of functional modules of a first embodiment of a light bar light failure detecting device of the present invention.
- FIG. 8 is a schematic diagram of functional modules of a second embodiment of a light strip light detecting device according to the present invention.
- FIG. 9 is a schematic diagram of a refinement function module of an aging experiment module in a third embodiment of the light bar light failure detecting device of the present invention.
- Label Name Label Name Label Name 100 Light bar light decay detection system 260 heat sink 320 Analytical device 200 Light bar assembly 270 Light strip to be tested 330 Cable 210 Support frame 221 Detection area 340 Fixed table 220 Front transparent panel 261 Rotating shaft 341 Straight rod 230 Dimming film 262 Bar 342 Base 240 Light guide 300 Color analyzer 250 A reflective sheet 310 Optical probe
- the light bar light decay detecting system 100 comprises a light bar assembly 200 and a color analyzer. 300.
- the light bar assembly 200 includes a support frame 210, a heat sink 260, and a light bar 270 to be tested.
- the support frame 210 may be a casing of a complete machine (such as a television) for fixing a display screen supporting the whole machine, and may be made of metal or
- the light bar 270 to be tested is disposed on the heat sink 260, and the heat sink 260 can dissipate heat for the power strip 270 to be tested to extend the service life of the light bar 270 to be tested.
- the color analyzer 300 includes an optical probe 310 and an analyzing device 320.
- the analyzing device 320 is electrically connected to the optical probe 310 through a connecting line 330.
- the optical probe 310 is used to detect the brightness of the light emitted by the light strip 270 to be tested, and the analyzing device 320 is used for multiple The brightness value measured by the optical probe 310 is acquired to analyze the light decay of the light bar 270 to be tested.
- the above-mentioned light bar light decay detection system uses the color analyzer 300 to detect the light decay of the light bar, and it is no longer necessary to use an expensive and bulky integrating sphere, which greatly reduces the cost of the light bar light decay detection, and also makes the entire lamp The space occupancy of the strip light detection system is greatly reduced.
- the light bar assembly 200 further includes a light-reducing film 230 disposed in the light-emitting direction of the light-strip to be tested 270 for reducing the brightness of the light to be tested.
- the light-reducing film 230 is connected to the support frame 210 to prevent the light emitted from the light-strip 270 to be tested from being directly emitted through the light-reducing film 230.
- the light attenuation characteristic of the light-reducing film 230 is required to be consistent with the light-fading characteristic of the display screen.
- the light transmittance of the light-reducing film 230 of the present embodiment is 3%-10%, which is related to the display screen of the television. The light transmittance is basically the same.
- the light emitted by the light bar 270 to be tested passes through the light-reducing film 230, and the brightness of the light to be tested can be measured by using a general color analyzer. Otherwise, the light of the light bar to be tested is too strong, which is more than normal. The color range of the color analyzer causes the measurement results to be inaccurate. After the light-reducing film 230 is disposed in the light bar assembly 200, the color analyzer can be prevented from measuring the inaccuracy of the illumination brightness of the light bar to be tested.
- the light bar assembly 200 further includes a front transparent panel 220 and a light guide plate 240.
- the front transparent panel 220, the light-reducing film 230, and the light guide plate 240 are sequentially stacked, and the front transparent panel 220 is disposed on the support.
- the light strip to be tested 270 is disposed laterally of the light guide plate 240 or away from the back surface of the light-reducing film 230.
- the front transparent panel 220 may be made of a transparent PVC material and conform to the size of the support frame 210.
- the light emitted by the light bar 270 to be tested is uniformly guided by the light guide plate 240 to the entire light guide plate 240, and the light reduction film 230 is disposed on the light guide plate. 240 in the direction of light.
- the optical probe 310 can be moved to the different detection areas on the front transparent panel 220 for testing, and the front transparent panel 220 is disposed at the outermost side, thereby avoiding the optical probe 310 from directly contacting the dimming film 230.
- the light-reducing film 230 is damaged.
- the optical probe 310 can be tightly attached to the front transparent panel 220 to avoid leakage of light and cause a large error in detection results. Thereby improving the accuracy of the detection result of the above light bar detection system.
- the light bar assembly 200 further includes a reflective sheet 250 disposed behind the light guide plate 240 away from the light exiting direction of the light guide plate 240.
- the reflective sheet 250 can direct all the light emitted by the light guide plate 240 to the light exiting direction, ensuring that the light probe 310 receives the light emitted by the light strip 270 to be tested to ensure the accuracy of the detection result.
- the reflector 250 is provided with a heat sink 260.
- the heat sink 260 has an L-shaped design, and the light strip 270 to be tested is fixed on the heat sink 260 with double-sided thermal conductive tape before being tested, and is disposed together in the light bar assembly 200. As shown in FIG.
- the heat sink 260 is provided with a rotating shaft 261 on both sides, and the heat sink 260 is fixed on the back surface of the support frame 210 through the rotating shaft 261; and a movable bar 262 is further disposed on the upper portion of the supporting frame 210 for locking Heat sink 260.
- the light bar light decay detecting system further includes a fixing table 340 for fixing the optical probe 310.
- the fixing table 340 includes a straight rod 341 and a base 342.
- the straight rod 341 is fixed on the base 342, and the optical probe 310 is fixedly connected to the straight rod 341.
- the light probe 310 can be moved up and down on the straight rod 341, for example, by a rotating twisting wire, and the base 342 can also be moved to the left and right as needed.
- the optical probe 310 can be moved to the different detection area 221 on the front transparent panel 220 for testing.
- the present invention provides a light bar light decay detecting system 100, which includes a light bar assembly 200 and a color analyzer 300, the light bar assembly 200 including a support frame 210, a light bar to be tested 270, and The heat sink 260 is disposed on the heat sink 260.
- the color analyzer 300 includes an optical probe 310 and an analysis device 320 electrically connected to each other, and the optical probe 310 detects the light strip 270 to be tested.
- the illumination device emits light
- the analyzing device 320 analyzes the light decay of the light bar to be tested 270 based on the detected light brightness.
- the invention no longer needs to use an expensive and bulky integrating sphere, but uses a common equipment color analyzer to detect the light decay of the light strip, greatly reducing the cost of detecting the light strip light decay, and reducing the light strip detection system of the light strip. take up space.
- the present invention also provides a light bar light failure detecting method.
- the method is based on a light bar light decay detecting system, and the system includes a light to be tested. a strip, a color analyzer, and a support frame, wherein the strip to be tested is assembled in a support frame, the color analyzer includes an optical probe and an analysis device electrically connected to each other, and the analyzer receives the brightness value collected by the optical probe.
- the light bar light attenuation detection method includes:
- Step S10 measuring the brightness of the light bar to be tested based on the optical probe to obtain a first brightness value of the light bar to be tested
- LEDs have more and more LED backlighting technologies, such as LCD TVs, because of their long life, energy saving, and convenient driving.
- LED backlight schemes There are two kinds of LED backlight schemes: one is direct type, that is, several LED lights are directly placed under the screen; the other is side-in type, that is, several LED lights are distributed around the periphery of the screen, and the light is evenly guided through the light guide plate. LCD screen. Both of these programs are currently widely used.
- LED lamps are usually connected in series to form a light bar, and then several strings of lights are illuminated by one or several constant current drive chips. However, in actual work, LED strips still have light decay. This is mainly due to the ability of the LED chip to withstand current.
- the phosphor used, the material of the bracket and the ambient temperature and humidity of the LED strip are subject to LED light. Decay and longevity have an impact. Therefore, verifying light decay is an important part of LED backlight TV design and production. Since the color analyzer commonly used for display color measurement can reflect the brightness of the LED light by measuring the brightness and chromaticity of each area of the display on the display, it can be directly measured by the color analyzer in the design and production of the LED backlight TV. The brightness of the LED strip is backlit, and the light decay of the LED strip is further calculated by calculation.
- the light bar to be tested is placed in the whole machine to detect the light decay of the light bar to be tested, which is more in line with practical applications, and the operation is also simpler.
- Before testing first make sure that the display of the whole machine is off (for example, cut off the power supply to the display), and build the above-mentioned light bar light decay detection system with the whole machine and color analyzer that removes the display, and then give the light to be tested.
- the strip is energized, and a position is selected on the front transparent panel of the replacement display screen, and the light probe of the color analyzer is attached to the front transparent panel of the marked position to measure the brightness value of the light strip to be tested, that is, The first brightness value of the light bar to be tested is recorded.
- Step S20 performing a preset aging experiment on the light strip to be tested
- the light bar to be tested After obtaining the first brightness value of the light bar to be tested, the light bar to be tested is powered off, and the light bar to be tested is taken out from the whole machine, and an aging experiment is performed.
- the light strip to be tested can be placed in a high temperature incubator, and then the test strip is energized to simulate the aging of the strip.
- the conditions of the aging experiment can be set as needed.
- the temperature of the incubator can be set to 80 degrees
- the power-on time can be set to 1000 hours.
- Step S30 the brightness of the light strip to be tested after the aging test is measured based on the optical probe, and the second brightness value of the light strip to be tested is obtained;
- the light strip to be tested is reassembled back into the original whole machine (ie, the support frame), and the light strip to be tested is re-energized, and then the optical probe of the color analyzer is attached.
- the brightness value of the light bar to be tested that is, the second brightness value of the light bar to be tested, is measured again, and is recorded.
- Step S40 calculating, according to the first brightness value and the second brightness value, the light decay of the light bar to be tested.
- the brightness of the light bar to be tested is measured by the optical probe to obtain a first brightness value of the light bar to be tested; and then a preset aging experiment is performed on the light bar to be tested; Measuring, by the optical probe, the brightness of the light bar to be tested after the aging test to obtain a second brightness value of the light bar to be tested; and finally calculating according to the first brightness value and the second brightness value Obtaining the light fading of the light strip to be tested, so that the detection of the light fading of the light strip can eliminate the use of an expensive and bulky integrating sphere, and the light fading of the light strip can be detected by using a common equipment color analyzer, and the detection is reduced.
- the economic cost of the light strip light decay, and the use of the color analyzer to detect the light fade of the light strip to be tested does not need to fit the light strip into the space-integrated integrating sphere, and only need to place the light strip to be tested in the whole machine, the light to be tested
- the disassembly, detection, and placement of the strips are very convenient, and the operation process for detecting the light decay of the light strips is simple and convenient.
- the second embodiment of the method for detecting the light fade of the light strip is proposed.
- the support frame And a light-reducing film is disposed on the light-receiving direction of the light-emitting strip to be tested, and the light emitted by the light-emitting strip to be tested forms a light surface on the light-reducing film, and step S10 includes:
- Step S11 marking a plurality of detection areas on the light-emitting surface
- Step S12 the optical probe is controlled to measure the brightness of the light emitted by the light strip to be tested in the detection area one by one, and the current average brightness value of the light strip to be tested is obtained according to the brightness measured by all the probes, and the average brightness is obtained. The value is taken as the first brightness value.
- a front transparent panel, a light-reducing film, a light guide plate and a reflection sheet are sequentially disposed in the support frame, and the light guide plate emits light uniformly to the entire light guide plate, and then directs the light to
- the light-reducing film and the front transparent panel form a glossy surface on the light-reducing film and the front transparent panel.
- a plurality of detecting regions 221 may be marked on the light emitting surface on the front transparent panel. As shown in FIG. 1 , in this embodiment, nine detecting regions 221 are marked on the light emitting surface on the front transparent panel. .
- the optical probe 310 can then measure the brightness of the light emitted by the light bar to be tested in the detection area 221 one by one, and obtain the current average of the light bar to be tested 270 according to the brightness measured by the light probe 310 of all the detection areas 221.
- the brightness value is taken as the first brightness value.
- Step S30 includes:
- Step S31 the optical probe is controlled to measure the brightness of the light emitted by the light strip to be tested after the aging test in the detection area, and the light to be tested after the aging experiment is obtained according to the brightness measured by all the probes.
- the average brightness value of the bar, and the average brightness value after the aging experiment is taken as the second brightness value.
- the light bar 270 to be tested is reinstalled into the whole machine, and is re-energized, and the light probe 310 is again measured one by one after the aging test in the detection area 221
- the brightness of the emitted light is obtained, and the average brightness value of the light bar to be tested 270 after the aging test is obtained according to the brightness measured by the light probe 310 of all the detection areas 221, and the average brightness value is taken as the second brightness value.
- the brightness of the light to be tested in the detection area is measured one by one before and after the preset light strip aging test, and respectively Obtaining the average brightness value of all the detection areas before and after the aging test of the light strip to be tested, and further calculating the light fading of the light strip to be tested, and obtaining the light strip to be tested by the method of averaging by multiple measurements The accuracy of light decay.
- a third embodiment of the light bar light failure detecting method is proposed.
- the supporting frame is further provided.
- the light strip to be tested is disposed on the heat sink, and step S20 includes:
- Step S21 the heat sink provided with the light bar to be tested is taken out and placed in an external thermostat preset duration, wherein the temperature in the incubator is constant at a preset temperature;
- step S22 the light strip to be tested taken out from the incubator is reinstalled on the support frame.
- the supporting frame is further provided with a heat sink, and the heat sink generally adopts a heat sink provided by the whole machine.
- the light strip to be tested is disposed on the heat sink and fixed together, for example, the light strip to be tested is pasted and fixed on the heat sink by double-sided thermal conductive tape.
- the heat sink with the light strip to be tested is taken out from the whole machine, and placed in an incubator for aging experiment, and the temperature of the incubator is set as a pre-exposure according to the actual aging experiment. Set the temperature and set the preset aging time according to the actual aging experiment.
- the temperature of the incubator is set to 80 degrees, and the preset aging time is set to 1000 hours. After the aging test is completed, the heat sink with the light strip to be tested is taken out from the incubator and reinstalled on the support frame of the whole machine.
- the temperature in the incubator is constant at a preset temperature; Reinstalling the light strip to be tested taken out from the incubator onto the support frame, and fixing the light strip to be tested and the heat sink together while performing an experimental operation, without using the integrating sphere to detect the light decay of the light strip.
- the light bar to be tested and the heat sink are separated, fixed, and separated, so that the light decay operation of the detection light bar is more convenient and simple.
- the present invention also provides a light bar light decay detecting device.
- the device is based on a light bar light decay detecting system, and the system includes a light bar to be tested. a color analyzer and a support frame, the light bar to be tested being mounted in a support frame, the color analyzer comprising an optical probe and an analysis device electrically connected to each other, the analysis device receiving a brightness value collected by the light probe,
- the light bar light decay detecting device comprises:
- a first obtaining module 10 configured to measure a brightness of the light bar to be tested based on the optical probe to obtain a first brightness value of the light bar to be tested;
- the light bar to be tested is placed in the whole machine to detect the light decay of the light bar to be tested, which is more in line with practical applications, and the operation is also simpler.
- Before testing first make sure that the display of the whole machine is off (for example, cut off the power supply to the display), and build the above-mentioned light bar light decay detection system with the whole machine and color analyzer that removes the display, and then give the light to be tested.
- the strip is energized, and a position is selected on the front transparent panel, and the first acquisition module 10 is attached to the front transparent panel of the marked position by the optical probe of the color analyzer, and the brightness value of the light strip to be tested is measured. That is, the first brightness value of the light bar to be tested is recorded.
- the aging experiment module 20 is configured to perform a preset aging test on the light bar to be tested;
- the light bar to be tested After obtaining the first brightness value of the light bar to be tested, the light bar to be tested is powered off, and the light bar to be tested is taken out from the whole machine, and an aging experiment is performed.
- the light strip to be tested can be placed in a high temperature incubator, and then the test strip is energized to simulate the aging of the strip.
- the conditions of the aging experiment can be set as needed.
- the temperature of the incubator can be set to 80 degrees
- the power-on time can be set to 1000 hours.
- a second obtaining module 30 configured to obtain, according to the brightness of the light bar to be tested after the aging test, the second brightness value of the light bar to be tested;
- the light bar to be tested is reassembled back into the original machine, and the light bar to be tested is re-energized, and then the light probe of the color analyzer is attached to the mark before the aging experiment. In position, the brightness value of the light bar to be tested is measured again, that is, the second brightness value of the light bar to be tested, and the recording is performed.
- the light fading calculation module 40 is configured to calculate, according to the first brightness value and the second brightness value, the light fading of the light bar to be tested.
- the first obtaining module 10 measures the brightness of the light bar to be tested by the optical probe to obtain a first brightness value of the light bar to be tested; and then the aging experiment module 20 pairs the light to be tested Performing a preset aging test; the second obtaining module 30 measures, by the optical probe, the brightness of the light bar to be tested after the preset light bar aging test, and obtains the second brightness value of the light bar to be tested.
- the final light fading calculation module 40 calculates the light fading of the light strip to be tested according to the first brightness value and the second brightness value, so that the detection of the light bar light fading can be expensive and bulky.
- the integrating sphere while using the common equipment color analyzer can detect the light decay of the light strip, reducing the economic cost of detecting the light strip light decay, and using the color analyzer to detect the light fade of the light strip to be tested without loading the light strip
- the narrow sphere of the integral sphere only the light strip to be tested is placed in the whole machine, and the disassembly, detection and placement of the strip to be tested is very convenient, so that the operation process of detecting the light decay of the strip is simple and convenient.
- the supporting frame A light-reducing film is disposed on the light-receiving direction of the light-emitting strip to be tested, and the light emitted by the light-emitting strip to be tested forms a light surface on the light-reducing film
- the first acquiring module 10 includes :
- a marking unit 11 for marking a plurality of detection areas on the light-emitting surface
- the first obtaining unit 12 is configured to control the optical probe to measure the brightness of the light emitted by the light bar to be tested in the detection area one by one, and obtain the current average brightness value of the light bar to be tested according to the brightness measured by all the probes.
- the average brightness value is taken as the first brightness value.
- a front transparent panel, a light-reducing film, a light guide plate and a reflection sheet are sequentially disposed in the support frame, and the light guide plate emits light uniformly to the entire light guide plate, and then directs the light to
- the light-reducing film and the front transparent panel form a glossy surface on the light-reducing film and the front transparent panel.
- a plurality of detecting regions 221 may be marked on the light emitting surface on the front transparent panel. As shown in FIG. 1 , in this embodiment, nine detecting regions 221 are marked on the light emitting surface on the front transparent panel. .
- the optical probe 310 can then measure the brightness of the light emitted by the light bar to be tested in the detection area 221 one by one, and obtain the current average of the light bar to be tested 270 according to the brightness measured by the light probe 310 of all the detection areas 221.
- the brightness value is taken as the first brightness value.
- the second obtaining module 30 includes:
- the second obtaining unit 31 is configured to control the light probe to measure the brightness of the light emitted by the light strip to be tested after the aging test in the detection area, and determine the brightness after the aging experiment according to the brightness measured by all the probes.
- the average brightness value of the light bar to be tested is used as the second brightness value after the aging test.
- the light bar 270 to be tested is reinstalled into the whole machine, and is re-energized, and the light probe 310 is again measured one by one after the aging test in the detection area 221
- the brightness of the emitted light is obtained, and the average brightness value of the light bar to be tested 270 after the aging test is obtained according to the brightness measured by the light probe 310 of all the detection areas 221, and the average brightness value is taken as the second brightness value.
- the marking unit 11 marks a plurality of detection areas on the light-emitting surface on the front transparent panel
- the first acquisition unit 12 and the second acquisition unit 31 respectively measure the measurement one by one before and after the preset light strip aging test. Detecting the brightness of the light emitted by the light strip to be tested in the detection area, and respectively determining the average brightness value of all the detection areas before and after the aging test of the light strip to be tested, and then calculating the light decay of the light strip to be tested, through multiple times
- the method of measuring and averaging improves the accuracy of obtaining the light decay of the light strip to be tested.
- a third embodiment of the light bar light decay detecting device is proposed.
- the supporting frame is further provided.
- the light strip to be tested is disposed on the heat sink, and the aging experiment module 20 includes:
- the take-out unit 21 is configured to take out the heat sink provided with the light strip to be tested and put it into an external thermostat for a preset period of time, wherein the temperature in the incubator is constant to a preset temperature;
- the mounting unit 22 is configured to reinstall the light strip to be tested taken out from the incubator onto the support frame.
- the supporting frame is further provided with a heat sink, and the heat sink generally adopts a heat sink provided by the whole machine.
- the light strip to be tested is disposed on the heat sink and fixed together, for example, the light strip to be tested is pasted and fixed on the heat sink by double-sided thermal conductive tape.
- the heat sink with the light strip to be tested is taken out from the whole machine, and placed in an incubator for aging experiment, and the temperature of the incubator is set as a pre-exposure according to the actual aging experiment. Set the temperature and set the preset aging time according to the actual aging experiment.
- the temperature of the incubator is set to 80 degrees, and the preset aging time is set to 1000 hours. After the aging test is completed, the heat sink with the light strip to be tested is taken out from the incubator and reinstalled on the support frame of the whole machine.
- the take-out unit 21 takes out the heat sink provided with the light strip to be tested and puts it into an external thermostat for a preset period of time, and the temperature in the incubator is constant at a preset temperature;
- the mounting unit 22 reinstalls the light strip to be tested taken out from the incubator onto the support frame, and fixes the light strip to be tested and the heat sink together while performing an experimental operation, without using an integrating sphere.
- the strip and the heat sink to be tested are separated, fixed, and separated, so that the light decay operation of the detecting strip is more convenient and simple.
- the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better.
- Implementation Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
- the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the methods of various embodiments of the present invention.
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Abstract
一种灯条光衰检测方法，该方法包括:基于光探头(310)测量待测灯条(270)的亮度，获得待测灯条(270)的第一亮度值；对待测灯条(270)进行预设的老化实验；基于光探头(310)测量经老化实验后的待测灯条(270)的亮度，获得待测灯条(270)的第二亮度值；以及根据第一亮度值和第二亮度值，计算获得待测灯条(270)的光衰。以及一种灯条光衰检测装置和系统(100)，使检测灯条光衰成本低廉，操作方便。
Description
技术领域
本发明涉及背光检测技术领域，尤其涉及一种灯条光衰检测方法、装置和系统。
背景技术
现在,愈来愈多LCD(Liquid Crystal Display
,液晶显示器)电视使用LED(light-emitting diode,
发光二极管)的背光技术，LED的优点是寿命长、省电节能、驱动方便。LED背光方案有两种：一种是直下式，由若干LED灯直接放在LCD屏的下面；另一种是侧入式，若干LED灯分布在LCD屏的周边，通过导光板将光均匀地导向LCD屏；LED灯通常是若干个串联，然后几串由一颗到几颗恒定电流驱动芯片来驱动点亮，驱动一般是用恒流源来实现的。
LED背光方案具有耗电省、寿命长的优点，但实际的工作中，由于LED灯的芯片承受电流的能力不同、所用的荧光粉不一样、支架的材料也不同,加之LED灯所受环境温度和湿度的不同，LED灯的光衰和使用寿命会受到不同程度的影响，因此，验证背光的光衰是LCD电视设计和生产中的重要一环。
电视背光的原理是：首先把LED灯装在灯条上，然后将LED灯条固定在散热片上,依靠散热片给LED灯散热。
传统的测试光衰方法基于积分球进行测试，测试方法如下：
1.
先将LED灯条放在积分球中，通过积分球外部的电源为LED灯条供电，测量并记录LED灯条的初始总光通亮；
2.
将测试完成的LED灯条取出，用导热双面胶将LED灯条粘贴在散热片上，然后送入高温80度的恒温箱，通电做1000小时的老化实验；
3. 做完老化实验的带散热片LED灯条从恒温箱中取出，用小刀将LED灯条和散热片分离；
4.
将分离的LED灯条放在积分球中，通过积分球外部的电源为LED灯条供电，测量并记录LED灯条的当前总光通量；
5. 比较实验前后LED灯条的初始光通量和当前光通量数据，计算得到光通量衰减的百分数。
但是，传统的LED灯测试光衰方法，需要使用价钱昂贵、使用不方便的积分球，且大尺寸的LED灯条无法放入积分球，若用大尺寸积分球，则价钱更加昂贵且占地方，从而导致传统的光衰测试方法具有测试成本高、操作复杂的技术问题。
发明内容
本发明的主要目的在于提供一种灯条光衰检测方法、装置和系统，旨在解决现有检测灯条光衰的方法价钱昂贵，操作复杂的技术问题。
为实现上述目的，本发明还提供一种灯条光衰检测方法，该方法基于灯条光衰检测系统，该系统包括待测灯条、色彩分析仪和支撑框架，所述待测灯条装配在支撑框架中，所述色彩分析仪包括相互电连接的光探头和分析装置，所述分析装置接收光探头采集的亮度值，所述灯条光衰检测方法包括：
基于所述光探头测量所述待测灯条的亮度，获得所述待测灯条的第一亮度值；
对所述待测灯条进行预设的老化实验；
基于所述光探头测量经老化实验后的所述待测灯条的亮度，获得所述待测灯条的第二亮度值；以及
根据所述第一亮度值和所述第二亮度值，计算获得所述待测灯条的光衰。
优选地，所述支撑框架上还设置有减光膜，所述减光膜位于所述待测灯条的出光方向上，所述待测灯条发出的光线在该减光膜上形成出光面，所述基于所述光探头测量所述待测灯条的亮度，获得所述待测灯条的第一亮度值的步骤包括：
在所述出光面上标记多个检测区域；
控制所述光探头逐个测量所述检测区域内待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出所述待测灯条当前的平均亮度值，将该平均亮度值作为第一亮度值。
优选地，所述基于所述光探头测量历经预设的灯条老化实验后的所述待测灯条的亮度，获得所述待测灯条的第二亮度值的步骤包括：
控制所述光探头逐个测量所述检测区域内经老化实验后的所述待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出经老化实验后的所述待测灯条的平均亮度值，将该历经老化实验后的平均亮度值作为第二亮度值。
优选地，所述支撑框架上还设有散热片，所述待测灯条设置在散热片上，所述对所述待测灯条进行预设的老化实验的步骤包括：
将设置有所述待测灯条的散热片取出并放入外置的恒温箱预设时长，其中所述恒温箱内的温度恒定为预设温度；
将从所述恒温箱取出的待测灯条重新安装到所述支撑框架上。
为实现上述目的，本发明还提供一种灯条光衰检测装置，该装置基于灯条光衰检测系统，该系统包括待测灯条、色彩分析仪和支撑框架，所述待测灯条装配在支撑框架中，所述色彩分析仪包括相互电连接的光探头和分析装置，所述分析装置接收光探头采集的亮度值，所述灯条光衰检测装置包括：
第一获取模块，用于基于所述光探头测量所述待测灯条的亮度，获得所述待测灯条的第一亮度值；
老化实验模块，用于对所述待测灯条进行预设的老化实验；
第二获取模块，用于基于所述光探头测量经老化实验后的所述待测灯条的亮度，获得所述待测灯条的第二亮度值；
光衰计算模块，用于根据所述第一亮度值和所述第二亮度值，计算获得所述待测灯条的光衰。
优选地，所述支撑框架上还设置有减光膜，所述减光膜位于所述待测灯条的出光方向上，所述待测灯条发出的光线在该减光膜上形成出光面，所述第一获取模块包括：
标记单元，用于在所述出光面上标记多个检测区域；
第一获取单元，用于控制所述光探头逐个测量所述检测区域内待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出所述待测灯条当前的平均亮度值，将该平均亮度值作为第一亮度值。
优选地，所述第二获取模块包括：
第二获取单元，用于控制所述光探头逐个测量所述检测区域经老化实验后的所述待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出经老化实验后的所述待测灯条的平均亮度值，将该历经老化实验后的平均亮度值作为第二亮度值。
优选地，老化实验模块包括：
取出单元，用于将设置有所述待测灯条的散热片取出并放入外置的恒温箱预设时长，其中所述恒温箱内的温度恒定为预设温度；
安装单元，用于将从所述恒温箱取出的待测灯条重新安装到所述支撑框架上。
为实现上述目的，本发明提供的一种灯条光衰检测系统，所述灯条光衰检测系统包括灯条组件和色彩分析仪，所述灯条组件包括支撑框架、待测灯条和散热片，所述待测灯条设置于散热片上，所述色彩分析仪包括相互电连接的光探头和分析装置，所述光探头检测所述待测光条所发出光线的亮度，所述分析装置基于多次检测的亮度以分析得出所述待测灯条的光衰。
优选地，所述灯条组件还包括设置于所述待测灯条的出光方向上的减光膜，所述减光膜与支撑框架连接。
优选地，所述减光膜的光透过率为3%至10%。
优选地，所述灯条组件还包括前透明面板和导光板，前透明面板、减光膜、导光板依次层叠设置，前透明面板设置于支撑框架的最外侧，待测灯条设置在导光板的侧向或背离减光膜的背面。
优选地，所述灯条组件还包括反射片，反射片设置在导光板之后、背离导光板的出光方向上。
优选地，所述散热片设置在所述反射片之后，待测灯头通过双面导热胶带固定在所述散热片上。
优选地，所述散热片呈L形设计。
本发明通过所述光探头测量所述待测灯条的亮度，获得所述待测灯条的第一亮度值；然后对所述待测灯条进行预设的老化实验；再通过所述光探头测量历经预设的灯条老化实验后的所述待测灯条的亮度，获得所述待测灯条的第二亮度值；最后根据所述第一亮度值和所述第二亮度值，计算获得所述待测灯条的光衰，使灯条光衰的检测可以不需要使用价钱昂贵且体积庞大的积分球，而使用常用设备色彩分析仪就可以检测灯条的光衰，降低了检测灯条光衰的经济成本，并且，利用色彩分析仪检测待测灯条光衰无需将灯条装入空间狭小的积分球中，只需将待测灯条置于整机中，待测灯条的拆装、检测和放置十分方便，使检测灯条光衰的操作过程简单方便。
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为本发明灯条光衰检测系统一实施例的场景示意图；
图2为本发明灯条光衰检测系统的灯条组件一实施例的内部侧视结构示意图；
图3为本发明灯条光衰检测系统的灯条组件一实施例的内部后视结构示意图；
图4为本发明灯条光衰检测方法第一实施例的流程示意图；
图5为本发明灯条光衰检测方法第二实施例的流程示意图；
图6为本发明灯条光衰检测方法第三实施例中对所述待测灯条进行预设的老化实验的步骤的细化流程示意图；
图7为本发明灯条光衰检测装置第一实施例的功能模块示意图；
图8为本发明灯条光衰检测装置第二实施例的功能模块示意图；
图9为本发明灯条光衰检测装置第三实施例中老化实验模块细化功能模块示意图。
附图标号说明：
| 标号 | 名称 | 标号 | 名称 | 标号 | 名称 |
| 100 | 灯条光衰检测系统 | 260 | 散热片 | 320 | 分析装置 |
| 200 | 灯条组件 | 270 | 待测灯条 | 330 | 连接线 |
| 210 | 支撑框架 | 221 | 检测区域 | 340 | 固定台 |
| 220 | 前透明面板 | 261 | 转轴 | 341 | 直杆 |
| 230 | 减光膜 | 262 | 档条 | 342 | 底座 |
| 240 | 导光板 | 300 | 色彩分析仪 | ||
| 250 | 反射片 | 310 | 光探头 |
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
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明提供了一种灯条光衰检测系统，参照图1和图2，在本发明灯条光衰检测系统的实施例中，灯条光衰检测系统100包括灯条组件200和色彩分析仪300。所述灯条组件200包括支撑框架210、散热片260和待测灯条270，支撑框架210可以是整机（例如电视机）的外壳，用于固定支撑整机的显示屏，可以用金属或一体注塑制成，待测灯条270设置在散热片260上，散热片260可以为上电的待测灯条270散热，延长待测灯条270的使用寿命。色彩分析仪300包括光探头310和分析装置320，分析装置320通过一连接线330电连接光探头310，光探头310用于检测待测光条270所发出光线的亮度，分析装置320用于多次获取光探头310测量的亮度值以分析得出待测灯条270的光衰。上述灯条光衰检测系统使用了色彩分析仪300来检测灯条的光衰，不再需要使用价格昂贵且体积庞大的积分球，大大降低了灯条光衰检测的成本，同时也使整个灯条光衰检测系统的空间占用大大减小。
进一步地，在上述灯条组件200中还包括在所述待测灯条270的出光方向上设置有减光膜230，用于降低待测灯条270的光照亮度。减光膜230连接在支撑框架210上，避免待测灯条270发出的光线没有经过减光膜230直接射出。需要特别指出的是，减光膜230的光衰特性要求要与显示屏的光衰特性一致，本实施例减光膜230的光透过率是3%-10%，与电视机显示屏的光透过率基本一致。待测灯条270发出的光线经过减光膜230，光照亮度降低后，才能使用一般的色彩分析仪测量待测灯条的光照亮度，否则会因待测灯条的光照太强，超过一般的色彩分析仪的光照亮度量程，从而造成测量结果不准确。在灯条组件200中设置减光膜230后，可以避免色彩分析仪测量待测灯条的光照亮度不准确。
进一步地，继续参照图2，在上述灯条组件200中还包括前透明面板220和导光板240，前透明面板220、减光膜230、导光板240依次层叠设置，前透明面板220设置于支撑框架210的最外侧，待测灯条270设置在导光板240的侧向或背离减光膜230的背面。前透明面板220可以由透明的PVC材料制作成，并与支撑框架210尺寸大小一致；待测灯条270发出的光被导光板240均匀地导向整个导光板240，减光膜230设置于导光板240的出光方向上。在测试灯条光衰时，光探头310可以在前透明面板220上移动到不同的检测区域进行测试，并且前透明面板220设置在最外侧，避免了光探头310因直接接触减光膜230而损坏减光膜230。同时，光探头310可以紧紧贴合在前透明面板220上，以免漏光而造成检测结果误差较大。从而提高上述灯条检测系统检测结果的准确性。
优选地，上述灯条组件200还包括反射片250，反射片250设置在导光板240之后，背离导光板240的出光方向。反射片250可以使导光板240发出的光全部射向出光方向上，确保光探头310最大限度地接受到待测灯条270发出的光以确保检测结果的准确性。反射片250后设置有散热片260，散热片260呈L形设计，并在测试前用双面导热胶带将待测灯条270固定在散热片260上，一起设置在灯条组件200中。如图3所示，散热片260在两侧设置有转轴261，散热片260通过转轴261固定在支撑框架210的背面；在支撑框架210的上部还设有可以转动的档条262，用于锁定散热片260。上述灯条光衰检测系统还包括一个用于固定光探头310的固定台340，固定台340包括直杆341和底座342，直杆341固定在底座342上，光探头310连接固定在直杆341上，例如通过一个旋转锣丝，可以使光探头310在直杆341上上下移动，同时底座342也可根据需要左右移动位置。在测试灯条光衰时，光探头310可以在前透明面板220上移动到不同的检测区域221进行测试。
在本实施例中，本发明通过提出一种灯条光衰检测系统100，该系统包括灯条组件200和色彩分析仪300，所述灯条组件200包括支撑框架210、待测灯条270和散热片260，所述待测灯条270设置于散热片260上，所述色彩分析仪300包括相互电连接的光探头310和分析装置320，所述光探头310检测所述待测光条270所发出光线的光照亮度，所述分析装置320基于多次检测的光照亮度以分析得出所述待测灯条270的光衰。本发明不再需要使用价格昂贵且体积庞大的积分球，而使用常用设备色彩分析仪来检测灯条的光衰，大大降低了灯条光衰检测成本，减小了灯条光衰检测系统的占用空间。
本发明还提供了一种灯条光衰检测方法，在本发明灯条光衰检测方法的第一实施例中，参照图4，该方法基于灯条光衰检测系统，该系统包括待测灯条、色彩分析仪和支撑框架，所述待测灯条装配在支撑框架中，所述色彩分析仪包括相互电连接的光探头和分析装置，所述分析装置接收光探头采集的亮度值，所述灯条光衰检测方法包括：
步骤S10，基于所述光探头测量所述待测灯条的亮度，获得所述待测灯条的第一亮度值；
目前，因为LED有寿命长、省电节能、驱动方便等优点，显示终端整机例如液晶电视等越来越多地使用LED的背光技术。LED背光方案有两种：一种是直下式，即若干LED灯直接放在屏的下面；另一种是侧入式，即若干LED灯分布在屏幕的周边，通过导光板将光均匀的导向液晶屏。目前这两种方案都应用得很普遍。LED灯通常是若干个串联在一起形成灯条，然后几串灯条由一颗或几颗恒定电流驱动芯片点亮。但实际工作中LED灯条还是有光衰的，这主要是由于LED的芯片承受电流的能力，所用的荧光粉，支架的材料和LED灯条所受环境温度和湿度等因素都会对LED的光衰和寿命有影响。因此，验证光衰是LED背光电视设计和生产中的重要环节。由于常用于显示屏色彩测量的色彩分析仪可以通过测量显示器上显示屏各个区域的亮度和色度进而反映LED灯发出光的亮度，因而在LED背光电视设计和生产中可以直接用色彩分析仪测量背光LED灯条的亮度，并进一步通过计算分析得到LED灯条的光衰。
本实施例是将待测灯条放在整机中检测待测灯条的光衰，这样更加符合实际应用，操作也更加简单。在测试前首先确定整机的显示屏处于关闭状态（例如切断给显示屏的供电），并用去除显示屏的整机和色彩分析仪搭建成上述灯条光衰检测系统，然后再给待测灯条通电，并在替代显示屏的前透明面板上选取一个位置，做好标记，用色彩分析仪的光探头贴合在这个标记位置的前透明面板上，测量待测灯条的亮度值，即所述待测灯条的第一亮度值，并做好记录。
步骤S20，对所述待测灯条进行预设的老化实验；
获得所述待测灯条的第一亮度值后，将待测灯条断电，并将待测灯条从整机中取出，并进行老化实验。在老化实验中，可以将待测灯条放到高温的恒温箱中，然后给待测灯条通电进行模拟灯条老化的实验。为缩短实际灯条老化的时间，老化实验的条件可以按需要设置，例如恒温箱的温度可以设置为80度，通电时长可以设置为1000小时等。
步骤S30，基于所述光探头测量经老化实验后的所述待测灯条的亮度，获得所述待测灯条的第二亮度值；
完成待测灯条的老化实验后，再把待测灯条重新装配回原来的整机（即支撑框架）中，重新给待测灯条通电，然后再把色彩分析仪的光探头贴合在老化实验前标记的位置上，再次测量待测灯条的亮度值，即所述待测灯条的第二亮度值，并做好记录。
步骤S40，根据所述第一亮度值和所述第二亮度值，计算获得所述待测灯条的光衰。
结合记录的所述待测灯条的所述第一亮度值和所述第二亮度值，把所述第二亮度值减去所述第一亮度值得到所述待测灯条老化实验前后的亮度差值，再将所述亮度差值除以所述第一亮度值，就可以得到所述待测灯条的光衰。
在本实施例中，通过所述光探头测量所述待测灯条的亮度，获得所述待测灯条的第一亮度值；然后对所述待测灯条进行预设的老化实验；再通过所述光探头测量经老化实验后的所述待测灯条的亮度，获得所述待测灯条的第二亮度值；最后根据所述第一亮度值和所述第二亮度值，计算获得所述待测灯条的光衰，使灯条光衰的检测可以不需要使用价钱昂贵且体积庞大的积分球，而使用常用设备色彩分析仪就可以检测灯条的光衰，降低了检测灯条光衰的经济成本，并且，利用色彩分析仪检测待测灯条光衰无需将灯条装入空间狭小的积分球中，只需将待测灯条置于整机中，待测灯条的拆装、检测和放置十分方便，使检测灯条光衰的操作过程简单方便。
进一步地，本发明在灯条光衰检测方法的第一实施例上，提出灯条光衰检测方法的第二实施例，参照图1和图5，在第二实施例中，所述支撑框架上还设置有减光膜，所述减光膜位于所述待测灯条的出光方向上，所述待测灯条发出的光线在该减光膜上形成出光面，步骤S10包括：
步骤S11，在所述出光面上标记多个检测区域；
步骤S12，控制所述光探头逐个测量所述检测区域内待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出所述待测灯条当前的平均亮度值，将该平均亮度值作为第一亮度值。
基于上述灯条光衰检测系统，在支撑框架中依次设置有前透明面板、减光膜、导光板和反射片，导光板将待测灯条发出光线均匀地整个导光板，再将光线射向减光膜和前透明面板，在减光膜和前透明面板上形成出光面。在检测灯条光衰时，可以在前透明面板上的出光面上标记多个检测区域221，如图1所示，本实施例在前透明面板上的出光面上标记了9个检测区域221。然后可以将所述光探头310逐个测量所述检测区域221内待测灯条发出光线的亮度，根据所有检测区域221所述光探头310测量的亮度求出所述待测灯条270当前的平均亮度值，将该平均亮度值作为第一亮度值。
步骤S30包括：
步骤S31，控制所述光探头逐个测量所述检测区域内经老化实验后的所述待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出经老化实验后的所述待测灯条的平均亮度值，将该历经老化实验后的平均亮度值作为第二亮度值。
在完成预设的灯条老化实验后，将待测灯条270重新装回整机中，并重新通电，再次将所述光探头310逐个测量所述检测区域221内历经老化实验后待测灯条发出光线的亮度，根据所有检测区域221所述光探头310测量的亮度求出所述待测灯条270历经老化实验后的平均亮度值，将该平均亮度值作为第二亮度值。
在本实施例中，通过在前透明面板上的出光面上标记多个检测区域，在预设的灯条老化实验前后分别逐个测量所述检测区域内待测灯条发出光线的亮度，并分别求出所述待测灯条老化实验前后所有检测区域的平均亮度值，进而计算得出所述待测灯条的光衰，通过多次测量再求平均的方法，提高了获得待测灯条光衰的准确度。
进一步地，本发明在灯条光衰检测方法的第一实施例上，提出灯条光衰检测方法的第三实施例，参照图6，在第三实施例中，所述支撑框架上还设有散热片，所述待测灯条设置在散热片上，步骤S20包括：
步骤S21，将设置有所述待测灯条的散热片取出并放入外置的恒温箱预设时长，其中所述恒温箱内的温度恒定为预设温度；
步骤S22，将从所述恒温箱取出的待测灯条重新安装到所述支撑框架上。
在上述灯条光衰检测系统中，所述支撑框架上还设有散热片，散热片一般采用整机自带的散热片。在进行灯条光衰检测前，将所述待测灯条设置在散热片上，并固定在一起，例如用双面导热胶带将待测灯条粘贴固定在散热片上。在进行待测灯条老化试验时，将固定有待测灯条的散热片从整机中取出，并放入恒温箱中进行老化实验，将恒温箱的温度按实际老化实验需要设定为预设温度，并按实际老化实验需要设定预设老化时长。本实施例将恒温箱的温度设置为80度，预设老化时长设置为1000小时。老化实验完成后，将固定有待测灯条的散热片从恒温箱中取出，并重新安装到整机的支撑框架上。
在本实施例中，通过将设置有所述待测灯条的散热片取出并放入外置的恒温箱预设时长，所述恒温箱内的温度恒定为预设温度；完成老化实验后再将从所述恒温箱取出的待测灯条重新安装到所述支撑框架上，使待测灯条和散热片固定在一起同时进行实验操作，不需要像在使用积分球检测灯条光衰时那样将待测灯条和散热片分离、固定、再分离，使检测灯条光衰操作更加方便简单。
本发明还提供了一个灯条光衰检测装置，在本发明灯条光衰检测装置的第一实施例中，参照图7，该装置基于灯条光衰检测系统，该系统包括待测灯条、色彩分析仪和支撑框架，所述待测灯条装配在支撑框架中，所述色彩分析仪包括相互电连接的光探头和分析装置，所述分析装置接收光探头采集的亮度值，所述灯条光衰检测装置包括：
第一获取模块10，用于基于所述光探头测量所述待测灯条的亮度，获得所述待测灯条的第一亮度值；
本实施例是将待测灯条放在整机中检测待测灯条的光衰，这样更加符合实际应用，操作也更加简单。在测试前首先确定整机的显示屏处于关闭状态（例如切断给显示屏的供电），并用去除显示屏的整机和色彩分析仪搭建成上述灯条光衰检测系统，然后再给待测灯条通电，并在前透明面板上选取一个位置，做好标记，第一获取模块10用色彩分析仪的光探头贴合在这个标记位置的前透明面板上，测量待测灯条的亮度值，即所述待测灯条的第一亮度值，并做好记录。
老化实验模块20，用于对所述待测灯条进行预设的老化实验；
获得所述待测灯条的第一亮度值后，将待测灯条断电，并将待测灯条从整机中取出，并进行老化实验。在老化实验中，可以将待测灯条放到高温的恒温箱中，然后给待测灯条通电进行模拟灯条老化的实验。为缩短实际灯条老化的时间，老化实验的条件可以按需要设置，例如恒温箱的温度可以设置为80度，通电时长可以设置为1000小时等。
第二获取模块30，用于基于所述光探头测量经老化实验后的所述待测灯条的亮度，获得所述待测灯条的第二亮度值；
完成待测灯条的老化实验后，再把待测灯条重新装配回原来的整机中，重新给待测灯条通电，然后再把色彩分析仪的光探头贴合在老化实验前标记的位置上，再次测量待测灯条的亮度值，即所述待测灯条的第二亮度值，并做好记录。
光衰计算模块40，用于根据所述第一亮度值和所述第二亮度值，计算获得所述待测灯条的光衰。
结合记录的所述待测灯条的所述第一亮度值和所述第二亮度值，把所述第二亮度值减去所述第一亮度值得到所述待测灯条老化实验前后的亮度差值，再将所述亮度差值除以所述第一亮度值，就可以得到所述待测灯条的光衰。
在本实施例中，第一获取模块10通过所述光探头测量所述待测灯条的亮度，获得所述待测灯条的第一亮度值；然后老化实验模块20对所述待测灯条进行预设的老化实验；第二获取模块30通过所述光探头测量历经预设的灯条老化实验后的所述待测灯条的亮度，获得所述待测灯条的第二亮度值；最后光衰计算模块40根据所述第一亮度值和所述第二亮度值，计算获得所述待测灯条的光衰，使灯条光衰的检测可以不需要使用价钱昂贵且体积庞大的积分球，而使用常用设备色彩分析仪就可以检测灯条的光衰，降低了检测灯条光衰的经济成本，并且，利用色彩分析仪检测待测灯条光衰无需将灯条装入空间狭小的积分球中，只需将待测灯条置于整机中，待测灯条的拆装、检测和放置十分方便，使检测灯条光衰的操作过程简单方便。
进一步地，本发明在灯条光衰检测装置的第一实施例上，提出灯条光衰检测装置的第二实施例，参照图1和图8，在第二实施例中，所述支撑框架上还设置有减光膜，所述减光膜位于所述待测灯条的出光方向上，所述待测灯条发出的光线在该减光膜上形成出光面，第一获取模块10包括：
标记单元11，用于在所述出光面上标记多个检测区域；
第一获取单元12，用于控制所述光探头逐个测量所述检测区域内待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出所述待测灯条当前的平均亮度值，将该平均亮度值作为第一亮度值。
基于上述灯条光衰检测系统，在支撑框架中依次设置有前透明面板、减光膜、导光板和反射片，导光板将待测灯条发出光线均匀地整个导光板，再将光线射向减光膜和前透明面板，在减光膜和前透明面板上形成出光面。在检测灯条光衰时，可以在前透明面板上的出光面上标记多个检测区域221，如图1所示，本实施例在前透明面板上的出光面上标记了9个检测区域221。然后可以将所述光探头310逐个测量所述检测区域221内待测灯条发出光线的亮度，根据所有检测区域221所述光探头310测量的亮度求出所述待测灯条270当前的平均亮度值，将该平均亮度值作为第一亮度值。
第二获取模块30包括：
第二获取单元31，用于控制所述光探头逐个测量所述检测区域经老化实验后的所述待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出经老化实验后的所述待测灯条的平均亮度值，将该历经老化实验后的平均亮度值作为第二亮度值。
在完成预设的灯条老化实验后，将待测灯条270重新装回整机中，并重新通电，再次将所述光探头310逐个测量所述检测区域221内历经老化实验后待测灯条发出光线的亮度，根据所有检测区域221所述光探头310测量的亮度求出所述待测灯条270历经老化实验后的平均亮度值，将该平均亮度值作为第二亮度值。
在本实施例中，标记单元11通过在前透明面板上的出光面上标记多个检测区域，第一获取单元12和第二获取单元31在预设的灯条老化实验前后分别逐个测量所述检测区域内待测灯条发出光线的亮度，并分别求出所述待测灯条老化实验前后所有检测区域的平均亮度值，进而计算得出所述待测灯条的光衰，通过多次测量再求平均的方法，提高了获得待测灯条光衰的准确度。
进一步地，本发明在灯条光衰检测装置的第一实施例上，提出灯条光衰检测装置的第三实施例，参照图9，在第三实施例中，所述支撑框架上还设有散热片，所述待测灯条设置在散热片上，老化实验模块20包括：
取出单元21，用于将设置有所述待测灯条的散热片取出并放入外置的恒温箱预设时长，其中所述恒温箱内的温度恒定为预设温度；
安装单元22，用于将从所述恒温箱取出的待测灯条重新安装到所述支撑框架上。
在上述灯条光衰检测系统中，所述支撑框架上还设有散热片，散热片一般采用整机自带的散热片。在进行灯条光衰检测前，将所述待测灯条设置在散热片上，并固定在一起，例如用双面导热胶带将待测灯条粘贴固定在散热片上。在进行待测灯条老化试验时，将固定有待测灯条的散热片从整机中取出，并放入恒温箱中进行老化实验，将恒温箱的温度按实际老化实验需要设定为预设温度，并按实际老化实验需要设定预设老化时长。本实施例将恒温箱的温度设置为80度，预设老化时长设置为1000小时。老化实验完成后，将固定有待测灯条的散热片从恒温箱中取出，并重新安装到整机的支撑框架上。
在本实施例中，取出单元21通过将设置有所述待测灯条的散热片取出并放入外置的恒温箱预设时长，所述恒温箱内的温度恒定为预设温度；完成老化实验后安装单元22再将从所述恒温箱取出的待测灯条重新安装到所述支撑框架上，使待测灯条和散热片固定在一起同时进行实验操作，不需要像在使用积分球检测灯条光衰时那样将待测灯条和散热片分离、固定、再分离，使检测灯条光衰操作更加方便简单。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质（如ROM/RAM、磁碟、光盘）中，包括若干指令用以使得一台终端设备（可以是手机，计算机，服务器，空调器，或者网络设备等）执行本发明各个实施例的方法。
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。
Claims (17)
- 一种灯条光衰检测方法，其特征在于，该方法基于灯条光衰检测系统，该系统包括待测灯条、色彩分析仪和支撑框架，所述待测灯条装配在支撑框架中，所述色彩分析仪包括相互电连接的光探头和分析装置，所述分析装置接收光探头采集的亮度值，所述灯条光衰检测方法包括：基于所述光探头测量所述待测灯条的亮度，获得所述待测灯条的第一亮度值；对所述待测灯条进行预设的老化实验；基于所述光探头测量经老化实验后的所述待测灯条的亮度，获得所述待测灯条的第二亮度值；以及根据所述第一亮度值和所述第二亮度值，计算获得所述待测灯条的光衰。
- 如权利要求1所述的灯条光衰检测方法，其特征在于，所述支撑框架上还设置有减光膜，所述减光膜位于所述待测灯条的出光方向上，所述待测灯条发出的光线在该减光膜上形成出光面，所述基于所述光探头测量所述待测灯条的亮度，获得所述待测灯条的第一亮度值的步骤包括：在所述出光面上标记多个检测区域；控制所述光探头逐个测量所述检测区域内待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出所述待测灯条当前的平均亮度值，将该平均亮度值作为第一亮度值。
- 如权利要求2所述的灯条光衰检测方法，其特征在于，所述基于所述光探头测量历经预设的灯条老化实验后的所述待测灯条的亮度，获得所述待测灯条的第二亮度值的步骤包括：控制所述光探头逐个测量所述检测区域内经老化实验后的所述待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出经老化实验后的所述待测灯条的平均亮度值，将该历经老化实验后的平均亮度值作为第二亮度值。
- 如权利要求1所述的灯条光衰检测方法，其特征在于，所述基于所述光探头测量历经预设的灯条老化实验后的所述待测灯条的亮度，获得所述待测灯条的第二亮度值的步骤包括：控制所述光探头逐个测量所述检测区域内经老化实验后的所述待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出经老化实验后的所述待测灯条的平均亮度值，将该历经老化实验后的平均亮度值作为第二亮度值。
- 如权利要求1所述的灯条光衰检测方法，所述支撑框架上还设有散热片，所述待测灯条设置在散热片上，所述对所述待测灯条进行预设的老化实验的步骤包括：将设置有所述待测灯条的散热片取出并放入外置的恒温箱预设时长，其中所述恒温箱内的温度恒定为预设温度；将从所述恒温箱取出的待测灯条重新安装到所述支撑框架上。
- 一种灯条光衰检测装置，其特征在于，该装置基于灯条光衰检测系统，该系统包括待测灯条、色彩分析仪和支撑框架，所述待测灯条装配在支撑框架中，所述色彩分析仪包括相互电连接的光探头和分析装置，所述分析装置接收光探头采集的亮度值，所述灯条光衰检测装置包括：第一获取模块，用于基于所述光探头测量所述待测灯条的亮度，获得所述待测灯条的第一亮度值；老化实验模块，用于对所述待测灯条进行预设的老化实验；第二获取模块，用于基于所述光探头测量经老化实验后的所述待测灯条的亮度，获得所述待测灯条的第二亮度值；光衰计算模块，用于根据所述第一亮度值和所述第二亮度值，计算获得所述待测灯条的光衰。
- 如权利要求6所述的灯条光衰检测装置，其特征在于，所述支撑框架上还设置有减光膜，所述减光膜位于所述待测灯条的出光方向上，所述待测灯条发出的光线在该减光膜上形成出光面，所述第一获取模块包括：标记单元，用于在所述出光面上标记多个检测区域；第一获取单元，用于控制所述光探头逐个测量所述检测区域内待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出所述待测灯条当前的平均亮度值，将该平均亮度值作为第一亮度值。
- 如权利要求7所述的灯条光衰检测装置，其特征在于，所述第二获取模块包括：第二获取单元，用于控制所述光探头逐个测量所述检测区域经老化实验后的所述待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出经老化实验后的所述待测灯条的平均亮度值，将该历经老化实验后的平均亮度值作为第二亮度值。
- 如权利要求6所述的灯条光衰检测装置，其特征在于，所述第二获取模块包括：第二获取单元，用于控制所述光探头逐个测量所述检测区域经老化实验后的所述待测灯条发出光线的亮度，根据所有所述探头测量的亮度求出经老化实验后的所述待测灯条的平均亮度值，将该历经老化实验后的平均亮度值作为第二亮度值。
- 如权利要求6所述的灯条光衰检测装置，其特征在于，老化实验模块包括：取出单元，用于将设置有所述待测灯条的散热片取出并放入外置的恒温箱预设时长，其中所述恒温箱内的温度恒定为预设温度；安装单元，用于将从所述恒温箱取出的待测灯条重新安装到所述支撑框架上。
- 一种灯条光衰检测系统，其特征在于，所述灯条光衰检测系统包括灯条组件和色彩分析仪，所述灯条组件包括支撑框架、待测灯条和散热片，所述待测灯条设置于散热片上，所述色彩分析仪包括相互电连接的光探头和分析装置，所述光探头检测所述待测光条所发出光线的亮度，所述分析装置基于多次检测的亮度以分析得出所述待测灯条的光衰。
- 如权利要求11所述的灯条光衰检测系统，其特征在于，所述灯条组件还包括设置于所述待测灯条的出光方向上的减光膜，所述减光膜与支撑框架连接。
- 如权利要求12所述的灯条光衰检测系统，其特征在于，所述减光膜的光透过率为3%至10%。
- 如权利要求12所述的灯条光衰检测系统，其特征在于，所述灯条组件还包括前透明面板和导光板，前透明面板、减光膜、导光板依次层叠设置，前透明面板设置于支撑框架的最外侧，待测灯条设置在导光板的侧向或背离减光膜的背面。
- 如权利要求13所述的灯条光衰检测系统，其特征在于，所述灯条组件还包括反射片，反射片设置在导光板之后、背离导光板的出光方向上。
- 如权利要求15所述的灯条光衰检测系统，其特征在于，所述散热片设置在所述反射片之后，待测灯头通过双面导热胶带固定在所述散热片上。
- 如权利要求15所述的灯条光衰检测系统，其特征在于，所述散热片呈L形设计。
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| CN103713253A (zh) * | 2014-01-07 | 2014-04-09 | 武汉纺织大学 | Led中光照度、色度、结温衰变特性的在线检测系统及方法 |
| CN104898312A (zh) * | 2015-06-25 | 2015-09-09 | 京东方科技集团股份有限公司 | 一种背光源检测装置及检测方法 |
| CN105021968A (zh) * | 2015-07-03 | 2015-11-04 | 厦门大学 | 一种led寿命加速在线测试系统 |
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| CN108489708A (zh) * | 2018-03-17 | 2018-09-04 | 付赵新能源科技（上海）有限公司 | 一种灯具光通量和光通维持率测试系统及方法 |
| CN109342975A (zh) * | 2018-10-12 | 2019-02-15 | 江门市蓬江区联诚达科技发展有限公司 | Led灯带检测机 |
| CN115184777A (zh) * | 2022-07-29 | 2022-10-14 | 河北圣昊光电科技有限公司 | 一种含soa的eml芯片全自动测试机及测试方法 |
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| CN105911486B (zh) | 2019-11-19 |
| CN105911486A (zh) | 2016-08-31 |
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