CN109946859A - The detection method and device of backlight module - Google Patents
The detection method and device of backlight module Download PDFInfo
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- CN109946859A CN109946859A CN201910278455.2A CN201910278455A CN109946859A CN 109946859 A CN109946859 A CN 109946859A CN 201910278455 A CN201910278455 A CN 201910278455A CN 109946859 A CN109946859 A CN 109946859A
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Abstract
The embodiment of the present application discloses the detection method and device of a kind of backlight module, wherein the detection method includes: to obtain the display picture of the display module in the grade decision process of the display module；Obtain the average brightness value of the display picture；Determine whether the backlight module is abnormal according to the average brightness value of the display picture.The immediately monitoring to backlight module may be implemented in the program.
Description
Technical field
This application involves field of optical measuring technologies more particularly to the detection methods and device of a kind of backlight module.
Background technique
Backlight module is one of key part and component of liquid crystal display, must since liquid crystal itself does not have the characteristics of luminescence
A light emitting source must be added in the liquid crystal display panel bottom surface (LCD, Liquid Crystal Display), can reached full
Color rendering effect.The function of backlight module is the planar light source for being to supply that brightness is sufficient and is evenly distributed, and enables LCD just
Often display image.Therefore, it when carrying out grade judgement to LCD panel, if exception occurs in backlight module, then will affect to LCD
The judgement of panel grade causes product classificatin abnormal.
In the related technology, it is generally detected using luminance measuring instrument (BM-7 type luminance brightness meter) and TFT-LCD panel lighting
The measuring system of machine (Table automatic measurement platform) composition measures the luminance of backlight module.However, such measurement method is not
It is able to achieve the immediately monitoring to backlight module.
Summary of the invention
The embodiment of the present application provides the detection method and device of a kind of backlight module, can carry out to backlight module instant
Monitoring.
The embodiment of the present application provides a kind of detection method of backlight module, wherein the backlight module is used for as display mould
Group provides display light source, and the detection method includes:
In the grade decision process of the display module, the display picture of the display module is obtained；
Obtain the average brightness value of the display picture；
Determine whether the backlight module is abnormal according to the average brightness value of the display picture.
In the detection method of backlight module described herein, the display picture is white picture or grey menu.
It is described to obtain when the display picture is colour picture in the detection method of backlight module described herein
Take it is described display picture average brightness value include:
Respective handling is carried out to the display picture, to obtain the white picture or grey menu of the display module；
The average brightness value of the display picture is obtained by the white picture or grey menu of the display module.
In the detection method of backlight module described herein, the average brightness value according to the display picture is true
Whether the fixed backlight module is abnormal, comprising:
Obtain the difference between the average brightness value and normal brightness value；
The difference is compared with preset threshold, and determines whether the backlight module is abnormal according to comparison result.
In the detection method of backlight module described herein, the preset threshold be range intervals, it is described according to than
Relatively result determines whether the backlight module is abnormal, comprising:
When the difference is not in the range intervals, determine that the backlight module is abnormal；
When the difference is in the range intervals, determine that the backlight module is normal.
In the detection method of backlight module described herein, the detection method further include:
When the backlight module exception, alarm signal is generated.
The embodiment of the present application also provides a kind of detection device of backlight module, comprising:
Board is detected, for carrying backlight module and display module, the backlight module is used to mention for the display module
For display light source, the display module is for showing picture；
Mould group is shot, for obtaining the display picture of the display module；
Controller, with the shooting mould group be electrically connected, for obtain it is described display picture average brightness value, and according to
The average brightness value of the display picture determines whether the backlight module is abnormal.
In the detection device of backlight module described herein, the shooting mould group and the display module interval are default
Distance.
In the detection device of backlight module described herein, the display picture is white picture or grey menu.
In the detection device of backlight module described herein, the detection device further include:
Alarm mould group, for generating alarm signal when the backlight module exception.
Backlight module detection method provided in this embodiment and device can be examined in the grade decision process of display module
Whether survey is abnormal as the backlight module of display module light source, and to prevent, backlight module is abnormal and the grade of display module is caused to be sentenced
It is fixed abnormal.The program can judge whether backlight module is abnormal by the average brightness of the display picture of detection display module, can
To realize the immediately monitoring to backlight module.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for
For those skilled in the art, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the structural schematic diagram of the detection device of backlight module provided by the embodiments of the present application.
Fig. 2 is the flow diagram of the detection method of backlight module provided by the embodiments of the present application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description.Obviously, described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, those skilled in the art's every other implementation obtained without creative efforts
Example, shall fall in the protection scope of this application.
It should be noted that liquid crystal display needs to carry out grade judgement to display module in an assembling process, with selection
Suitable display module out.
In the grade decision process of display module, need using light source of the backlight module as display module, to realize
The grade of display module is determined.
It should be noted that needing the light of backlight module offer during the grade to display module determines
Stablize in source.Once exception occurs in backlight module, then the grade that will lead to display module determines exception.
For this purpose, the application detects backlight module while the grade to display module determines, to ensure
Backlight module is capable of providing stable light source, prevents from causing the grade of display module to determine exception because backlight module is abnormal.
Referring to Fig. 1, Fig. 1 is the flow diagram of the detection method for the backlight module that embodiment provides.In the application reality
It applies in example, method can be will test applied in detection device as shown in Figure 2, carried out with realizing in the grade to display module
While judgement, function that backlight module is detected.
Wherein, detailed process can be such that
101, in the grade decision process of the display module, the display picture of the display module is obtained.
As shown in Fig. 2, needing backlight module 202 is display module 203 in the grade deterministic process of display module 202
Display light source is provided.Wherein, backlight module 202 and display module 203 are both placed in the loading end of detection board 201, backlight mould
Group 202 and display module 203 can be arranged side by side, abut or be alternatively arranged.
In some embodiments, backlight module 202 can be cold light film (EL, Electro Luminescent), cold cathode
Fluorescent tube (CCFL, Cold Cathode Fluorescent Lamp) or light emitting diode (LED, Light Emitting
Diode) etc..
Wherein, display module 203 can be the shape of rule, such as rectangular parallelepiped structure, round rectangle structure, display module
203 may be irregular shape.In some embodiments, display module 203 can be liquid crystal display.
Specifically, in the grade decision process of display module 203 the display mould can be obtained by shooting mould group 204
The display picture of group 203.In some embodiments, the display picture of display module 203 can for white picture, grey menu or
Colour picture.It should be noted that in practical applications, when the grade to display module 203 determines, display module
203 display picture is generally white picture or grey menu.
Wherein, it shoots between mould group 204 and display module 203 and is spaced pre-determined distance, it is to be understood that the pre-determined distance
The distance of whole display pictures of display module 203 can be at least taken for shooting mould group 204.It should be noted that shooting
The equipment that mould group 204 can have image-acquisition functions for macroface machine, video recorder or monitoring probe etc..Wherein, when shooting mould
When picture captured by group 204 is dynamic menu, the frame picture in dynamic menu can be extracted as the aobvious of display module 203
Show picture；It, can be directly by this using tableaux as display mould when shooting picture captured by mould group 204 is tableaux
The display picture of group 203.
102, the average brightness value of the display picture is obtained.
It should be noted that display picture can be directly acquired when showing picture is white picture or grey menu
Average brightness value.When showing picture is colour picture, need to perform corresponding processing the display picture, to obtain the display
Then the white picture or grey menu of picture obtain the display picture by the white picture or grey menu of the display picture again
The average brightness value in face.
Specifically, the display picture of display module 203 can be obtained by shooting mould group 204 by controller 205.Work as display
When picture is white picture or grey menu, the brightness value of each pixel in the display picture can be directly acquired, is then counted
Calculate the average brightness value of each pixel.When showing picture is colour picture, need to be first white by display picture processing
The brightness value of each pixel in picture or grey menu, then the white picture by obtaining the display picture or grey menu,
To obtain the average brightness value of each pixel.It should be noted that the average brightness value of each pixel is to show picture
Average brightness value.
103, determine whether the backlight module is abnormal according to the average brightness value of the display picture.
Specifically, the average brightness value for showing picture can be compared with normal brightness value, and according to comparison result
Determine whether backlight module is abnormal.That is, step " determines that the backlight module is according to the average brightness value of the display picture
No exception " may include:
Obtain the difference between the average brightness value and normal brightness value；
The difference is compared with preset threshold, and determines whether the backlight module is abnormal according to comparison result.
Wherein, normal brightness value is in the normal situation of backlight module, and the standard of the display picture of display module is average
Brightness value.Wherein, standard average brightness value can be set according to actual conditions by staff.
Wherein, preset threshold is related with the model of display module, i.e. the preset threshold of the display module of different model not phase
Together.In practical application, in the normal situation of backlight module, the display picture of the different display modules of two same models is put down
Equal brightness value can be stored in certain fluctuation range (fluctuation of product processing procedure).It should be noted that two same models are not
Display picture with display module is fixed image (identical image).
It in some embodiments, can be in the normal situation of backlight module, by repeatedly aobvious to the difference of same model
Show that the display picture of mould group is shot, obtains the average brightness value of display picture.Multiple average brightness values are compared again,
The normal fluctuation range section of the average brightness value of the display picture of the display module of the model is obtained, and the range intervals are made
For the preset threshold of the display module of the model.That is, step " determining whether the backlight module abnormal according to comparison result ",
May include:
When the difference is not in the range intervals, determine that the backlight module is abnormal；
When the difference is in the range intervals, determine that the backlight module is normal.
It is understood that the difference is the average brightness value of the display picture of the different display modules of two same models
Fluctuation range can determine that backlight module is in abnormality when the fluctuation range is not within default fluctuation range.
In some embodiments, when detecting backlight module exception, it can produce alarm signal, to remind staff
It is adjusted in time.
Backlight module detection method provided in this embodiment is by obtaining in the grade decision process of the display module
The display picture of the display module；The average brightness value of the display picture is obtained again；Then according to the display picture
Average brightness value determines whether the backlight module is abnormal.The program can detect work in the grade decision process of display module
Whether abnormal for the backlight module of display module light source, to prevent, backlight module is abnormal and causes the grade judgement of display module different
Often.
Also, whether the program can judge backlight module by the average brightness of the display picture of detection display module
It is abnormal, the immediately monitoring to backlight module may be implemented.
Referring to Fig.2, the detection device of backlight module provided by the embodiments of the present application may include: detection board 201, backlight
Mould group 202, display module 203, shooting mould group 204 and controller 205.It should be noted that detection device shown in Fig. 2
200 are not limited to the above content, can also include other devices, for example can also include power supply, conveyer belt etc..Wherein noun
Meaning it is identical with above-mentioned detection method, specific implementation details can be with reference to the explanation in embodiment of the method.
Wherein, detection board 201 is for carrying backlight module 202 and display module 203.
Wherein, backlight module 202 is placed on detection board 201, for providing display light source for display module 203, is made
Display module 203 can normally show picture.
Wherein, shooting mould group 204 can be used for obtaining the display picture of display module 203.
Wherein, shooting mould group 204 and display module 203 are spaced pre-determined distance.
Wherein, controller 205 and shooting mould group 204 are electrically connected.In some embodiments, controller 205 can be used for
Obtain the average brightness of the display picture of display module 203 acquired in shooting mould group 204, and being averaged according to the display picture
Brightness determines whether backlight module 202 is abnormal.
In some embodiments, detection device 200 can also include alarm mould group.Wherein, alarm mould group and controller 205
It is electrically connected, for when controller 205 detects that backlight module 202 is abnormal, signal an alert.In some embodiments,
Alarm device may include the devices such as loudspeaker, signal lamp.When backlight module 202 is abnormal, signal lamp flashes, and loudspeaker issue
Alarm song, to remind staff.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, reference can be made to the related descriptions of other embodiments.
A kind of detection method of backlight module and device provided by the embodiment of the present application are described in detail above,
Specific examples are used herein to illustrate the principle and implementation manner of the present application, and the explanation of above embodiments is only used
The technical solution and its core concept of the application are understood in help；Those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, the model of the technical solution of each embodiment of the application that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (10)
1. a kind of detection method of backlight module, the backlight module is used to provide display light source for display module, and feature exists
In the detection method includes:
In the grade decision process of the display module, the display picture of the display module is obtained；
Obtain the average brightness value of the display picture；
Determine whether the backlight module is abnormal according to the average brightness value of the display picture.
2. detection method as described in claim 1, which is characterized in that the display picture is white picture or grey menu.
3. detection method as described in claim 1, which is characterized in that described to obtain when the display picture is colour picture
Take it is described display picture average brightness value include:
Respective handling is carried out to the display picture, to obtain the white picture or grey menu of the display module；
The average brightness value of the display picture is obtained by the white picture or grey menu of the display module.
4. detection method as described in claim 1, which is characterized in that the average brightness value according to the display picture is true
Whether the fixed backlight module is abnormal, comprising:
Obtain the difference between the average brightness value and normal brightness value；
The difference is compared with preset threshold, and determines whether the backlight module is abnormal according to comparison result.
5. detection method as claimed in claim 4, which is characterized in that the preset threshold be range intervals, it is described according to than
Relatively result determines whether the backlight module is abnormal, comprising:
When the difference is not in the range intervals, determine that the backlight module is abnormal；
When the difference is in the range intervals, determine that the backlight module is normal.
6. detection method as claimed in claim 5, which is characterized in that further include:
When the backlight module exception, alarm signal is generated.
7. a kind of detection device of backlight module characterized by comprising
Board is detected, for carrying backlight module and display module, the backlight module is aobvious for providing for the display module
Show light source, the display module is for showing picture；
Mould group is shot, for obtaining the display picture of the display module；
Controller is electrically connected with the shooting mould group, for obtaining the average brightness value of the display picture, and according to described
The average brightness value of display picture determines whether the backlight module is abnormal.
8. detection device as claimed in claim 7, which is characterized in that the shooting mould group and the display module interval are default
Distance.
9. detection device as claimed in claim 7, which is characterized in that the display picture is white picture or grey menu.
10. detection device as claimed in claim 7, which is characterized in that the detection device further include:
Alarm mould group, for generating alarm signal when the backlight module exception.
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|---|---|
| CN109946859B (en) | 2022-02-01 |
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