CN106061004B - The test method and system of LED module - Google Patents
The test method and system of LED module Download PDFInfo
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- CN106061004B CN106061004B CN201610361701.7A CN201610361701A CN106061004B CN 106061004 B CN106061004 B CN 106061004B CN 201610361701 A CN201610361701 A CN 201610361701A CN 106061004 B CN106061004 B CN 106061004B
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- led module
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- threshold value
- predetermined threshold
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Led Devices (AREA)
Abstract
The invention discloses a kind of test methods of LED module, including：Obtain the brightness of LED module to be measured；When the brightness of the LED module to be measured is not in predetermined threshold value section, the driving current of the LED module to be measured is adjusted；It repeats the above steps until the brightness of the LED module to be measured is located at the predetermined threshold value section.The test method and system of LED module provided by the invention, the brightness of LED module is set to reach requirement by adjusting the driving current of LED module the undesirable LED module of brightness, can in production with EDID it is burned it is synchronous carry out, it can also be used in module high-volume operation, module brightness can be accurately controlled, it can be cost-effective.
Description
Technical field
The invention belongs to display apparatus test fields, more particularly, to the test method and system of a kind of LED module.
Background technology
Liquid crystal display panel in present widely used liquid crystal display does not shine, but relies on the backlight after liquid crystal display panel
Light source is provided, to complete display function.The use of more backlight is at present Light-emitting diode LED, LED in liquid crystal display panel
As the backlight of liquid crystal display, color reducibility is good, and brightness uniformity is good, long lifespan, and anti-seismic performance is good, has applied
In the back lighting device of liquid crystal display panel.
The brightness regulation range of the brightness regulating apparatus of liquid crystal module has only divided equal portions, can only do rough brightness output,
It cannot accomplish accurately to segment, test request is not achieved.Such as liquid crystal display, it can only be got by manually controlling drawing software
R, then G, B (RGB) gray-scale figure carries out brightness and increases or decreases by adjusting brightness button "+" and "-", this mode is
Belong to the coarse adjustment of liquid crystal module brightness, the adjusting grade of this regulative mode is less, and cannot export accurate brightness value.City at present
The device not adjusted accurately specifically for the brightness value of liquid crystal module on face cannot be accomplished accurately to segment, be not achieved
Test request.
Invention content
The purpose of the present invention is to provide a kind of test method of LED module and systems.
According to an aspect of the present invention, a kind of test method of LED module is provided, including：Obtain the bright of LED module to be measured
Degree；When the brightness of the LED module to be measured is not in predetermined threshold value section, the driving current of the LED module to be measured is adjusted；
It repeats the above steps until the brightness of the LED module to be measured is located at the predetermined threshold value section.
Preferably, the predetermined threshold value section includes the first predetermined threshold value and the second predetermined threshold value, wherein described first is pre-
If threshold value is less than second predetermined threshold value.
Preferably, when the brightness of the LED module to be measured is less than first predetermined threshold value, it is adjusted up LED to be measured
The driving current of module.
Preferably, when the brightness of the LED module to be measured is more than second predetermined threshold value, LED to be measured is adjusted downwards
The driving current of module.
Preferably, the test method of above-mentioned LED module further includes：When the brightness of the LED module to be measured is described default
When in threshold range, the driving current of the LED module to be measured is compared with the predetermined current threshold；When described to be measured
When the driving current of LED module is less than or equal to the predetermined current threshold, normal signal is sent out；When the LED module to be measured
Driving current be more than the predetermined current threshold when, signal an alert.
According to another aspect of the present invention, a kind of test system of LED module is provided, including：LED module；Arrangement for detecting,
It is connect with the LED module, the brightness for obtaining the LED module to be measured；Control device, with the LED module and described
Arrangement for detecting connects, and the brightness of the LED module for being sent according to the arrangement for detecting generates control signal, and is sent to
The LED module, wherein the LED drive circuit of the LED module is bright according to LED module described in the control Signal Regulation
Degree is located at predetermined threshold value section.
Preferably, the predetermined threshold value section includes the first predetermined threshold value and the second predetermined threshold value, wherein described first is pre-
If threshold value is less than second predetermined threshold value.
Preferably, when the brightness of the LED module to be measured is less than first predetermined threshold value, it is adjusted up LED to be measured
The driving current of module.
Preferably, when the brightness of the LED module to be measured is more than second predetermined threshold value, LED to be measured is adjusted downwards
The driving current of module.
Preferably, the test system of above-mentioned LED module further includes：Control module, for being sent according to the arrangement for detecting
The LED module brightness generate control signal；Wherein, the control module is additionally operable to work as the bright of the LED module to be measured
When degree is in the preset threshold range, the driving current of the LED module to be measured is compared with the predetermined current threshold
Compared with；First indicating module is used for when the driving current of the LED module to be measured is less than or equal to the predetermined current threshold,
Send out normal signal；Second indicating module is more than the predetermined current threshold for the driving current when the LED module to be measured
When, signal an alert.
The undesirable LED module of brightness is passed through adjusting by the test method and system of LED module provided by the invention
The driving current of LED module makes the brightness of LED module reach requirement, can in production with EDID it is burned it is synchronous carry out,
It can be used in module high-volume operation, module brightness can be accurately controlled, it can be cost-effective.
Description of the drawings
By referring to the drawings to the description of the embodiment of the present invention, above-mentioned and other purposes of the invention, feature and
Advantage will be apparent from, in the accompanying drawings：
Fig. 1 shows the structural schematic diagram of the test system of LED module according to the ... of the embodiment of the present invention；
Fig. 2 shows the flow charts of the test method of LED module according to the ... of the embodiment of the present invention.
Specific implementation mode
Hereinafter reference will be made to the drawings is more fully described various embodiments of the present invention.In various figures, identical element
It is indicated using same or similar reference numeral.For the sake of clarity, the various pieces in attached drawing are not necessarily to scale.
The present invention can be presented in a variety of manners, some of them example explained below.
Fig. 1 shows the structural schematic diagram of the test system of LED module according to the ... of the embodiment of the present invention.As shown in Figure 1, institute
It includes LED module 10, arrangement for detecting 20 and control device 30 to be measured to state test system.
Wherein, LED module 10 to be measured includes display panel 11, flexible PCB 12, pcb board 13 and LED drive circuit 14.
Wherein, the LED drive circuit 14 provides driving current by pcb board 13 and flexible PCB 12 to display panel 11, makes
LED module 10 to be measured works normally.
Arrangement for detecting 20 is connect with the LED module 10 to be measured, the brightness for obtaining the LED module to be measured 10.
In the present embodiment, the arrangement for detecting 20 is detecting camera lens, detects the brightness of display panel 11.
The arrangement for detecting 20 is also connect with the control device 30, for the brightness of the display panel 11 to be sent to
Control device 30.
Control device 30 is connect with the arrangement for detecting 20, for generating control letter according to the brightness of the display panel 11
Number, and it is sent to the LED module 10.
In the present embodiment, the LED drive circuit 14 of the LED module is according to LED moulds described in the control Signal Regulation
The brightness of group is located at predetermined threshold value section.
In the present embodiment, predetermined threshold value section includes the first predetermined threshold value and the second predetermined threshold value, wherein described first
Predetermined threshold value is less than second predetermined threshold value.
In a preferred embodiment, when the brightness of the LED module to be measured is less than the first predetermined threshold value, to up-regulation
Save the driving current of LED module to be measured.When the brightness of the LED module to be measured is more than second predetermined threshold value, to downward
Save the driving current of LED module to be measured.
In a preferred embodiment, the control device 30 further includes control module 31,32 and of the first indicating module
Second indicating module 33, wherein the brightness for the LED module that the control module 31 is used to be sent according to the arrangement for detecting
Generate control signal；The control module 31 is additionally operable to when the brightness of the LED module to be measured is in preset threshold range, will
The driving current of the LED module to be measured is compared with predetermined current threshold；First indicating module 32 is used for when described
When the driving current of LED module to be measured is less than or equal to the predetermined current threshold, normal signal is sent out；The second instruction mould
Block 33 is used for when the driving current of the LED module to be measured is more than the predetermined current threshold, signal an alert.
In the present embodiment, the first indicating module 32 and the second indicating module 33 are indicator light.
Specifically, LED module 10 is lighted, the brightness of display panel 11 is detected with arrangement for detecting 20, feed back to control dress
In setting 30, the brightness of display panel 11 is compared with the predetermined threshold value in control device 30.
When the brightness of display panel 11 is less than the first predetermined threshold value, the output control signal of control device 30, LED driving electricity
Road 14 adjusts upward the driving current of LED module as unit of 0.2mA, and the brightness of display panel 11 at this time changes, weight
The multiple above process, if the brightness of display panel 11 is greater than or equal to first predetermined threshold value, and the driving current of LED module
Less than or equal to the predetermined current threshold, the output control signal of control device 30, the OK of LED module adjustment at this time stops adjusting
The indicator light of the driving current of LED module 10, the first indicating module 32 is always on；If the brightness of display panel 11 is still less than first
Predetermined threshold value, and the driving current of LED module is more than predetermined current threshold, the indicator light of the second indicating unit 33 is always on, explanation
The LED module is unable to reach requirement, flows or readjust predetermined current threshold after begging to surrender etc..
When the brightness of display panel 11 is more than the second predetermined threshold value, the output control signal of control device 30, LED driving electricity
Road 14 adjusts downwards the driving current of LED module as unit of 0.2mA, and the brightness of display panel 11 at this time changes, weight
The multiple above process, if the brightness of display panel 11 is less than or equal to the second predetermined threshold value, and the driving current of LED module is less than
Or it is equal to predetermined current threshold, the output control signal of control device 30, the OK of LED module adjustment at this time stops adjusting LED module 10
Driving current, the indicator light of the first indicating module 32 is always on.
When the brightness of display panel 11 is greater than or equal to the first predetermined threshold value and is less than or equal to the second predetermined threshold value, control
The indicator light of first indicating module 32 of device 30 processed is always on, and the LED module is without adjustment.
The test system of LED module provided by the invention, by the undesirable LED module of brightness by adjusting LED moulds
The driving current of group makes the brightness of LED module reach requirement, can be in production with the burned synchronous progress of EDID, can also be
It is used when module high-volume operation, module brightness can be accurately controlled, it can be cost-effective.
Fig. 2 shows the flow charts of the test method of LED module according to the ... of the embodiment of the present invention.The test method is applicable in
In test system shown in FIG. 1.As shown in Fig. 2, the test method includes the following steps.
In step S01, the brightness of LED module to be measured is obtained.
In the present embodiment, LED module to be measured includes display panel 11, flexible PCB 12, pcb board 13 and LED drivings
Circuit 14.Wherein, the LED drive circuit 14 provides driving by pcb board 13 and flexible PCB 12 to display panel 11
Electric current makes LED module 10 to be measured work normally.The brightness of display panel 11 is detected using detecting camera lens.
In step S02, when the brightness of the LED module to be measured is not in predetermined threshold value section, LED moulds to be measured are adjusted
The driving current of group.
In the present embodiment, predetermined threshold value section includes the first predetermined threshold value and the second predetermined threshold value, wherein described first
Predetermined threshold value is less than second predetermined threshold value.When the brightness of the LED module to be measured is less than first predetermined threshold value, to
The upper driving current for adjusting the LED module to be measured.When the brightness of the LED module to be measured is more than second predetermined threshold value
When, the driving current of the LED module to be measured is adjusted downwards.
In step S03, step S01-S02 is repeated until the brightness of the LED module to be measured is located at described preset
Threshold interval.
In a preferred embodiment, the test method of the LED module is further comprising the steps of.
In step S04, when the brightness of the LED module to be measured is in preset threshold range, by the LED moulds to be measured
The driving current of group is compared with the predetermined current threshold.
In step S05, when the driving current of the LED module to be measured is less than or equal to the predetermined current threshold,
Send out normal signal.
In step S06, when the driving current of the LED module to be measured is more than the predetermined current threshold, police is sent out
The number of notifying.
In the present embodiment, LED module 10 is lighted, the brightness of display panel 11 is detected with arrangement for detecting 20, is fed back to
In control device 30, the brightness of display panel 11 is compared with the predetermined threshold value in control device 30.
When the brightness of display panel 11 is less than first predetermined threshold value, the output control signal of control device 30, LED drives
Dynamic circuit 14 adjusts upward the driving current of LED module as unit of 0.2mA, and the brightness of display panel 11 at this time changes
Become, repeat the above process, if the brightness of display panel 11 is greater than or equal to the first predetermined threshold value, and the driving electricity of LED module
Stream is less than or equal to predetermined current threshold, the output control signal of control device 30, and the OK of LED module adjustment at this time stops adjusting LED
The indicator light of the driving current of module 10, the first indicating module 32 is always on；If the brightness of display panel 11 is still less than described the
One predetermined threshold value, and the driving current of LED module is more than predetermined current threshold, the indicator light of the second indicating unit 33 is always on, says
The bright LED module is unable to reach requirement, flows or readjust predetermined current threshold after begging to surrender etc..
When the brightness of display panel 11 is more than second predetermined threshold value, the output control signal of control device 30, LED drives
Dynamic circuit 14 adjusts downwards the driving current of LED module as unit of 0.2mA, and the brightness of display panel 11 at this time changes
Become, repeat the above process, if the brightness of display panel 11 is less than or equal to second predetermined threshold value, and the drive of LED module
Streaming current is less than or equal to the predetermined current threshold, the output control signal of control device 30, and the OK of LED module adjustment at this time stops
The driving current of LED module 10 is only adjusted, the indicator light of the first indicating module 32 is always on.
When the brightness of display panel 11 is greater than or equal to first predetermined threshold value and is preset less than or equal to described second
When threshold value, the indicator light of the first indicating module 32 of control device 30 is always on, and the LED module is without adjustment.
The test method of LED module provided by the invention, by the undesirable LED module of brightness by adjusting LED moulds
The driving current of group makes the brightness of LED module reach requirement, can be in production with the burned synchronous progress of EDID, can also be
It is used when module high-volume operation, module brightness can be accurately controlled, it can be cost-effective.
As described above according to the embodiment of the present invention, there is no all details of detailed descriptionthe for these embodiments, also not
Limit the specific embodiment that the invention is only described.Obviously, as described above, can make many modifications and variations.This explanation
These embodiments are chosen and specifically described to book, is in order to preferably explain the principle of the present invention and practical application, belonging to making
Technical field technical staff can utilize modification of the invention and on the basis of the present invention to use well.The protection model of the present invention
The range that the claims in the present invention are defined should be subject to by enclosing.
Claims (10)
1. a kind of test method of LED module, the LED module includes display panel and LED drive circuit, including：
Obtain the brightness of LED module to be measured；
When the brightness of the LED module to be measured is not in predetermined threshold value section, the driving electricity of the LED module to be measured is adjusted
Stream；
It repeats the above steps until the brightness of the LED module to be measured is located at the predetermined threshold value section, and the LED moulds
The driving current of group is no more than predetermined current threshold；
Wherein, when the brightness of the LED module to be measured is less than in the predetermined threshold value section, and the driving of the LED module is electric
Stream is more than predetermined current threshold, carries out the rear stream such as dropping to the LED module to be measured or readjusts predetermined current threshold.
2. the test method of LED module according to claim 1, wherein the predetermined threshold value section includes first default
Threshold value and the second predetermined threshold value, wherein first predetermined threshold value is less than second predetermined threshold value.
3. the test method of LED module according to claim 2, wherein when the brightness of the LED module to be measured is less than institute
When stating the first predetermined threshold value, it is adjusted up the driving current of the LED module to be measured.
4. the test method of LED module according to claim 2, wherein when the brightness of the LED module to be measured is more than institute
When stating the second predetermined threshold value, the driving current of the LED module to be measured is adjusted downwards.
5. the test method of LED module according to claim 1, the method further include：
When the brightness of the LED module to be measured is in the preset threshold range, by the driving current of the LED module to be measured
It is compared with the predetermined current threshold；
When the driving current of the LED module to be measured is less than or equal to the predetermined current threshold, normal signal is sent out；
When the driving current of the LED module to be measured is more than the predetermined current threshold, signal an alert.
6. a kind of test system of LED module, including：
LED module, the LED module include display panel and LED drive circuit；
Arrangement for detecting is connect with the LED module, the brightness for obtaining LED module to be measured；
Control device is connect with the LED module and the arrangement for detecting, described in being sent according to the arrangement for detecting
The brightness of LED module generates control signal, and is sent to the LED module,
Wherein, the LED drive circuit of the LED module makes its position according to the brightness of LED module described in the control Signal Regulation
In predetermined threshold value section, and the driving current of the LED module is no more than predetermined current threshold；
When the brightness of the LED module to be measured is less than in the predetermined threshold value section, and the driving current of the LED module is more than
When predetermined current threshold, drop etc. is rear to flow or readjusts predetermined current threshold.
7. the test system of LED module according to claim 6, wherein the predetermined threshold value section includes first default
Threshold value and the second predetermined threshold value, wherein first predetermined threshold value is less than second predetermined threshold value.
8. the test system of LED module according to claim 7, wherein when the brightness of the LED module to be measured is less than institute
When stating the first predetermined threshold value, it is adjusted up the driving current of the LED module to be measured.
9. the test system of LED module according to claim 7, wherein when the brightness of the LED module to be measured is more than institute
When stating the second predetermined threshold value, the driving current of the LED module to be measured is adjusted downwards.
10. the test system of LED module according to claim 6, the control device include：
The brightness of control module, the LED module for being sent according to the arrangement for detecting generates control signal；
Wherein, the control module is additionally operable to when the brightness of the LED module to be measured is in the preset threshold range, by institute
The driving current for stating LED module to be measured is compared with the predetermined current threshold；
First indicating module is used for when the driving current of the LED module to be measured is less than or equal to the predetermined current threshold,
Send out normal signal；
Second indicating module, for when the driving current of the LED module to be measured is more than the predetermined current threshold, sending out police
The number of notifying.
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| CN201610361701.7A CN106061004B (en) | 2016-05-26 | 2016-05-26 | The test method and system of LED module |
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| CN201610361701.7A CN106061004B (en) | 2016-05-26 | 2016-05-26 | The test method and system of LED module |
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| CN106061004B true CN106061004B (en) | 2018-09-04 |
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| CN108198528B (en) * | 2017-12-27 | 2020-12-22 | 信利半导体有限公司 | OLED brightness detection method |
| CN110211545B (en) * | 2019-05-15 | 2021-08-17 | 昆山龙腾光电股份有限公司 | Residual image eliminating method, residual image eliminating circuit and display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1874631A (en) * | 2005-05-31 | 2006-12-06 | 台达电子工业股份有限公司 | Light source system, and control method |
| CN204810609U (en) * | 2015-06-30 | 2015-11-25 | 丰秀英 | Controlling means's of electrified stream and temperature monitoring function LED lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102404901A (en) * | 2010-09-14 | 2012-04-04 | 扬光绿能股份有限公司 | Lighting device and control method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1874631A (en) * | 2005-05-31 | 2006-12-06 | 台达电子工业股份有限公司 | Light source system, and control method |
| CN204810609U (en) * | 2015-06-30 | 2015-11-25 | 丰秀英 | Controlling means's of electrified stream and temperature monitoring function LED lamp |
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