CN105628344A - Backlight module group, light transmission uniformity detection system therefor, and LED mixed bead matching method for backlight module group - Google Patents
Backlight module group, light transmission uniformity detection system therefor, and LED mixed bead matching method for backlight module group Download PDFInfo
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- CN105628344A CN105628344A CN201610070551.4A CN201610070551A CN105628344A CN 105628344 A CN105628344 A CN 105628344A CN 201610070551 A CN201610070551 A CN 201610070551A CN 105628344 A CN105628344 A CN 105628344A
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
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Abstract
The invention relates to a backlight module group, a light transmission uniformity detection system therefor, and an LED mixed bead matching method for the backlight module group. The method comprises the steps: detection, calculation and mixed matching. The method selects a plurality of LED chips with different luminous fluxes and/or light outgoing angles, and the plurality of LED chips are corresponding to a plurality of positions on a display screen, so as to compensate the brightness difference caused by the difference of light transmittance of the display screen at different positions, to achieve the fine tuning of the brightness of the display screen at different positions, and to finally enable the display brightness of the display screen to be uniform. Meanwhile, the display screen is a 2D, naked-eye 3D or glasses-type 3D display screen, and the above method can enable the uniformity of the display brightness of the display screen to be improved to 95% or more, thereby achieving the high-definition or ultra-high-definition display, and enabling the backlight module group to be higher in brightness, reliability and uniformity so s to meet the demands of a joint wall product or single-machine product with higher requirements for uniformity, such as a monitoring room joint screen, a single machine, a joint screen advertisement machine, or a single machine.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of backlight module and printing opacity uniformity detection system thereof and the mixed pearl of LED matches method.
Background technology
At present, along with the fast development of technology, increasing occasion needs to use large-scale LED to show module, for display advertisement information, commodity display information, conferencing information etc. And common display module generally normally results in screen transmission uniformity and declines when necessarily big size. And, for large-area combination, advertisement screen etc., require over multiple common display module to be spliced to form, but owing to splicing effect is unable to reach perfect structure, the uniformity that the entirety such as large-area combination, advertisement screen go out light then can be made to decline to some extent, so the problem needing to solve full screen light-emitting uniformity further.
Certainly, it is also possible to because display module is realize different display effects, need constantly to attach on a display screen the film of difference in functionality, and the interaction of each film, make the incident illumination that backlight module is launched after display screen, conforming light-out effect can not be obtained, make display brightness uniform not, the technology requirement improving light-emitting uniformity further cannot be met, its picture quality sense not only directly resulting in display is poor, also have impact on the Experience Degree of user, reduce the competitiveness of product in market.
Summary of the invention
Based on this, it is necessary to provide the comparatively uniform backlight module of a kind of display brightness and printing opacity uniformity detection system thereof and the mixed pearl of LED thereof to match method.
A kind of printing opacity uniformity detection system, including:
Light source module, for sending the incident ray of brightness uniformity;
Be respectively placed in the both sides of described printing opacity monitor station for installing the printing opacity monitor station of display screen, described display screen and described light source module, described incident ray is through obtaining emergent ray after described display screen;
Multiple sensors, the plurality of sensor is distributed on described display screen away from the side of described printing opacity monitor station, and each sensor is for detecting the emergent ray of the corresponding position of described display screen, it is thus achieved that the brightness that described relevant position is corresponding; And
The message handler being connected with described sensor, for recording described brightness and the corresponding relation of multiple positions on display screen, forms the first incidence relation table between multiple positions and described brightness on described display screen.
The mixed pearl of the LED of a kind of backlight module matches method, including:
Detecting step: irradiate the incidence surface of described display screen with uniform incident ray, exiting surface side subregion at described display screen gathers the emergent ray of multiple positions outgoing, obtain the brightness that on described display screen, multiple positions are corresponding, and it is translated into light transmittance, constitute the incidence relation between multiple positions and described light transmittance on described display screen;
Calculation procedure: according to brightness of display screen value, specified light transmittance, display area, the number of LED chip, relation between the parameter factors that the luminous flux of single led chip unit are is relevant with the translucent effect of display screen surface attaching membrane module, according to target setting brightness value, the specified light transmittance of described display screen, the quantity of the LED chip set, the luminous flux of the single led chip unit are set and the display area of described display screen, calculate described display screen surface and attach the relevant parameter factors of translucent effect of membrane module to influence coefficient produced by the brightness of described display screen,
Mashed up step: attach the relevant parameter factors of translucent effect of the membrane module display area to incidence relation between multiple positions and described light transmittance on influence coefficient, described display screen produced by the brightness of described display screen and described display screen according to target setting brightness value, the quantity of the LED chip of setting, described display screen surface, determine the luminous flux of multiple LED chips corresponding with multiple positions on described display screen on backlight module one by one, wherein, on described display screen, the luminous flux of multiple LED chips that multiple positions are corresponding is different.
A kind of backlight module, including:
The display module of plate-like structure, described display module include display screen and display screen surface attach membrane module and, described surface attaches membrane module and is attached on described display screen;
Supporting back board, is arranged with described display module parallel interval, and described supporting back board is disposed far from the side of described display screen;
Luminescence component, it is arranged in described supporting back board, and it is just right with described display module, described luminescence component includes substrate, LED chip and cell-shell, described substrate is fixed on described substrate, described LED chip is located on described substrate, and electrically connects with described substrate, and described cell-shell is covered on described LED chip; And
Reflection diaphragm, described reflection diaphragm is arranged on described substrate, described LED chip and described substrate are respectively placed in the both sides of described reflection diaphragm, the light that described LED chip sends reflexes to described display module through described reflection diaphragm, it is the incidence surface of light that described display screen surface attaches membrane module, and described display screen is the exiting surface of light;
Wherein, described luminescence component has multiple, and multiple described luminescence components distinguish multiple subregions of corresponding described display screen, the different subregion correspondence difference luminous fluxes of described display screen and/or the described LED chip of beam angle.
Above-mentioned printing opacity uniformity detection system is by carrying out Subarea detecting to display screen, to obtain brightness or the light transmittance of multiple positions on different subregions on display screen.
The mixed pearl of the LED of above-mentioned backlight module matches method, utilize above-mentioned printing opacity uniformity detection system, by detecting step, calculation procedure and mashed up step, the LED chip selecting different luminous flux is corresponding with multiple positions of display screen, so that display screen is made up owing to the light transmittance of diverse location there are differences caused luminance difference, the brightness of diverse location on display screen is finely tuned, finally makes the display brightness of display screen be able to homogenization, also make manufacturing cost minimum simultaneously.
Matched the obtained backlight module of method by the mixed pearl of above-mentioned LED and there is higher brightness, reliability and uniformity. And the display screen in backlight module can be 2D, bore hole 3D or spectacle 3D display screen, to different types of display screen, higher display brightness and show uniformity all can be obtained, it is possible to brightness uniformity is brought up to more than 95%, it is achieved that high definition or ultra high-definition show by said method.
Accompanying drawing explanation
Fig. 1 is the structural representation of the printing opacity uniformity detection system of one embodiment of the invention;
The mixed pearl of LED that Fig. 2 is the backlight module of one embodiment of the invention matches method flow diagram;
Fig. 3 is the structural representation that display screen carries out in detecting step shown in Fig. 2 region division;
Fig. 4 is the structural representation in mashed up step shown in Fig. 2, LED chip laid;
Fig. 5 is the back light module unit structure schematic diagram of one embodiment of the invention; And
Fig. 6 is the structural representation at A place in Fig. 5.
Detailed description of the invention
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully. Accompanying drawing gives the better embodiment of the present invention. But, the present invention can realize in many different forms, however it is not limited to embodiments described herein. On the contrary, provide the purpose of these embodiments be make the disclosure is understood more thorough comprehensively.
It should be noted that be referred to as " being fixed on " another element when element, it can directly on another element or can also there is element placed in the middle. When an element is considered as " connection " another element, it can be directly to another element or may be simultaneously present centering elements. For illustrative purposes only, being not offered as is unique embodiment for term as used herein " vertical ", " level ", "left", "right" and similar statement.
Unless otherwise defined, all of technology used herein is identical with the implication that the those skilled in the art belonging to the present invention are generally understood that with scientific terminology. The term used in the description of the invention herein is intended merely to the purpose describing specific embodiment, it is not intended that in the restriction present invention. Term as used herein " and/or " include the arbitrary and all of combination of one or more relevant Listed Items.
As it is shown in figure 1, the printing opacity uniformity detection system 100 of one embodiment of the invention, it is mainly used in display screen is carried out brightness detection. Printing opacity uniformity detection system 100 includes light source module 110, printing opacity monitor station 120, multiple sensor 130, message handler 140 and display module 150.
Light source module 110 is for sending the incident ray of brightness uniformity. Specifically in the present embodiment, light source module 110 can be the uniform fluorescent lamp of emitting brightness. In other embodiments, light source module 110 can be the light fixture of other any type of emergent ray brightness uniformity.
Display screen is installed on printing opacity monitor station 120, and display screen and light source module 110 are respectively placed in the both sides of printing opacity monitor station 120, and the incident ray sent from light source module 110 obtains emergent ray through after display screen. Printing opacity monitor station 120 can be the desktop with a clear glass, or can also be the bracing frame with a hollow out desktop, is used for fixing display screen to be detected, makes display location for receiving the light of the brightness uniformity injected from incidence surface on printing opacity monitor station 120.
Multiple sensors 130 are distributed on display screen away from the side of printing opacity monitor station 120, and each sensor 130 is for detecting the emergent ray of the corresponding position of display screen, it is thus achieved that the brightness that relevant position is corresponding. Such as, display screen being carried out subregion, the multiple vertex positions at subregion arrange sensor.
Message handler 140 is connected with sensor 130. Message handler 140, for recording brightness and the corresponding relation of multiple positions on display screen, forms the first incidence relation table between multiple positions and brightness on display screen.
And, message handler 140 is additionally operable to be converted into brightness light transmittance, forms the second incidence relation table between multiple positions and light transmittance on display screen.
Message handler 140 carries out visualization display by least one in the information such as the display module 150 relative position to sensor 130, printing opacity monitor station 120 and light source module 110, the first incidence relation table, and the second incidence relation table.
Concrete, sensor 130 includes picture acquisition module (not shown) and the image processing module being connected with picture acquisition module (not shown). Image processing module is connected with message handler 140. Wherein, picture acquisition module obtains the brightness picture of display screen, and sends the brightness picture of display screen to image processing module. Image processing module determines the brightness of display screen according to brightness picture, and sends the monochrome information of display screen to message handler 140. Sensor 130 can also detect sensor for brightness, or the testing result being also based on luminance sensor or illuminance transducer converts the corresponding brightness of acquisition.
Display screen can be carried out brightness detection by above-mentioned printing opacity uniformity detection system 100, and the brightness detected is converted into light transmittance. It is pointed out that light transmittance is obtained by the ratio of outgoing brightness with incident brightness. Specifically in the present embodiment, printing opacity uniformity detection system 100 is that the multiple positions on the multiple intervals preset on display screen are detected respectively, to obtain the brightness of multiple positions on display screen. Now, the ratio of the brightness that on display screen, light transmittance corresponding to multiple positions is detected by corresponding position and the incident brightness of relevant position obtains.
Shown in Fig. 1 and Fig. 2, present invention also offers the mixed pearl of the LED of a kind of backlight module and match method, utilize above-mentioned printing opacity uniformity detection system 100, display screen and LED chip are carried out matched design, so that the brightness of backlight module is consistent in each interval maintenance, make display screen have comparatively uniform display brightness, the overall light-emitting uniformity of straight-down negative display screen is brought up to more than 95%, remote superstate standard.
Specifically in the present embodiment, the mixed pearl method of matching of the LED of backlight module includes detecting step, calculation procedure and mashed up step.
In detecting step, the incidence surface of display screen is irradiated with uniform incident ray, exiting surface side subregion at display screen gathers the emergent ray of multiple positions outgoing, obtain the brightness that on display screen, multiple positions are corresponding, and it is translated into light transmittance, constitute the incidence relation between multiple positions and light transmittance on display screen.
In conjunction with shown in Fig. 1 to Fig. 3, concrete, utilize above-mentioned printing opacity uniformity detection system 100 to complete detecting step. First display screen is carried out subregion, using vertex positions multiple on display screen as the multiple positions on display screen. It is correspondingly arranged sensor 130 at interval vertex position, incident ray is detected through the emergent ray after display screen by sensor 130, obtain the brightness that the vertex position at sensor 130 place is corresponding, and then obtain the brightness that on display screen, multiple vertex positions are corresponding. Detected the detection of system 100 by printing opacity uniformity, it is clear that understand the magnitude relationship of multiple positions brightness each other on each region divided on display screen.
It is concrete in this example it is shown that screen is rectangular flat shape structure. Assuming that the length of display screen is W, width is H. In detecting step, first display screen is divided into 16 regions, obtains 9 summits. And, wherein the distance on 4 long limits of vertex distance be H/9, distance broadside distance be W/9. Further, select the midpoint of the line of any two point in these 4 points, namely obtain 5 points, and then determine the position of 9 points. The position of these 9 points is respectively arranged sensor 130, and then by detecting the brightness obtaining these 9 some places.
Brightness by 9 apex, it is possible to obtain light transmittance through conversion, it is thus achieved that the light transmittance that on display screen, this 9 vertex positions are corresponding, constitutes the incidence relation between multiple vertex positions and light transmittance on display screen.
In calculation procedure, according to brightness of display screen value, specified light transmittance, display area, the number of LED chip, relation between the parameter factors that the luminous flux of single led chip unit are is relevant with the translucent effect of display screen surface attaching membrane module, according to target setting brightness value, the specified light transmittance of display screen, the quantity of the LED chip set, the luminous flux of the single led chip unit are set and the display area of display screen, calculate display screen surface and attach the relevant parameter factors of translucent effect of membrane module to influence coefficient produced by the brightness of display screen.
It is to be noted, target setting brightness value is X, the specified light transmittance of display screen is b, the quantity of the LED chip set is as N, the luminous flux of the single led chip unit are set is as Y, the display area of display screen is S, and it is a that display screen surface attaches the relevant parameter factors of translucent effect of membrane module to influence coefficient produced by the brightness of display screen. The product being luminous flux on the S parameter factors relevant with the translucent effect of display screen surface attaching membrane module to influence coefficient produced by the brightness of display screen equal to the specified light transmittance of display screen, N number of LED chip at display area by target brightness value X, can obtaining further, display screen surface attaches the relevant parameter factors of translucent effect of membrane module and influence coefficient a produced by the brightness of display screen is specifically calculated by following formula obtains:
It is pointed out that display screen surface attaches the relevant parameter factors of translucent effect of membrane module and is specially diffuser plate, the first diffusion barrier sheet, the first prism film, the second prism film, prism film and the second diffusion barrier sheet. Display screen surface attaches the relevant parameter factors of translucent effect of membrane module to the product that influence coefficient a produced by the brightness of display screen is the light transmittance k1 of diffuser plate, the light transmittance k2 of the first diffusion barrier sheet, the rate z1 that adds lustre to of the first prism film, the rate z2 that adds lustre to of the second prism film, the rate z3 that adds lustre to of prism film, the light transmittance k3 of the second diffusion barrier sheet, the distance influence coefficient a1 between LED chip and diffuser plate and other correction factors a2, namely
A=k1k2k3z1z2z3a1a2
In mashed up step, the relevant parameter factors of translucent effect of the membrane module display area to incidence relation between multiple positions and light transmittance on influence coefficient, display screen produced by the brightness of display screen and display screen is attached according to target setting brightness value, the quantity of the LED chip of setting, display screen surface, determine the luminous flux of multiple LED chips that positions multiple with on display screen are corresponding on backlight module, wherein, on display screen, the luminous flux of multiple LED chips that multiple positions are corresponding is different.
Concrete, target setting brightness value is X, the light transmittance corresponding to one vertex position of display screen is b ', the quantity of the LED chip set is as N, the display area of display screen is S, the display screen surface obtained according to above-mentioned calculation procedure attaches the relevant parameter factors of the translucent effect of membrane module to influence coefficient a produced by the brightness of display screen, by target brightness value X equal to the light transmittance of correspondence position on display screen, the product that N number of LED chip is luminous flux on the S parameter factors relevant with the translucent effect of display screen surface attaching membrane module to influence coefficient produced by the brightness of display screen at display area, can obtain further, the luminous flux Y ' in single led chip unit are that on display screen, vertex position place is corresponding is specifically calculated by following formula and obtains:
Utilize the light transmittance of multiple vertex positions on display screen, calculated one by one by said method, it is possible to obtain the luminous flux of multiple LED chips corresponding to multiple vertex position. The luminous flux of the LED chip corresponding to multiple apex that light transmittance is different there is also difference.
Can so that the display brightness of multiple positions of display screen all can reach desired value by said method, and then the display brightness of multiple positions that light transmittance on display screen be there are differences finely tunes, so that display screen display brightness realizes homogenization, improve display effect.
As shown in Figure 4, concrete, in mashed up step, can also according to the luminous flux of multiple LED chips corresponding to positions multiple on display screen obtained above, it may be determined that distance J1 between LED chip in the different LED chips of beam angle, the distance J2 determined between multiple LED lamp bar that multiple LED chip is formed and LED lamp bar.
Pass through cost calculation, the LED chip that optic angle is suitable can be selected, and distance between multiple LED lamp bar that LED chip formed and in LED lamp bar distance between LED chip finely tune respectively so that when meeting brightness demand, making manufacturing cost relatively low.
Luminous flux in mashed up step, according to LED chip, it is also possible to determine the series-parallel circuit connected mode between multiple LED lamp bar that multiple LED chip is formed and the series-parallel circuit connected mode of LED chip in LED lamp bar. Concrete, it is possible to by LED chip series connection consistent for luminous flux in LED lamp bar, and LED chips different for luminous flux is carried out parallel connection or series-parallel connection. And, LED lamp bar consistent for multiple luminous fluxes is connected, and LED lamp bar different for luminous flux is carried out parallel connection or series-parallel connection.
By the LED chip in LED lamp bar and LED lamp bar being carried out circuit connection in series-parallel design, to obtain rational circuit connection structure, and then simplify the complexity that circuit connects. Meanwhile, also make the outgoing brightness of display screen keep consistent at different subregions, and then obtain the comparatively uniform picture of brightness.
It is pointed out that the selection for LED chip, it is necessary under the life situations set, select the light decay LED chip lower than 30%, specifically in the present embodiment, the life-span of the LED chip set was as 50,000 hours.
In conjunction with shown in Fig. 3 to Fig. 6, the present invention also provides for a kind of being matched the obtained backlight module of method 200 by above-mentioned mixed pearl. Backlight module 200 includes display module 210, supporting back board 220, luminescence component 230 and reflection diaphragm 240.
Display module 210 is plate-like structure. Display module 210 includes display screen 211 and display screen surface attaches membrane module 212. Wherein display screen surface attaching membrane module 212 is attached on display screen 211. It is concrete in this example it is shown that screen surfaces attaches membrane module 212 includes diffuser plate the 213, first diffusion barrier sheet the 214, first prism film the 215, second prism film 216, prism film the 217, second diffusion barrier sheet 218. Diffuser plate the 213, first diffusion barrier sheet the 214, first prism film the 215, second prism film 216, prism film the 217, second diffusion barrier sheet 218 set gradually, and the second diffusion barrier sheet 218 is connected with display screen 211.
Supporting back board 220 is arranged with display module 210 parallel interval. Supporting back board 220 is disposed far from the side of display screen 211.
Luminescence component 230 is arranged in supporting back board 220, and just right with display module 210. Luminescence component 230 includes substrate 231, LED chip 232 and cell-shell 233. Substrate 231 is fixed on substrate 231, and LED chip 232 is located on substrate 231, and electrically connects with substrate 231, and cell-shell 233 is covered on LED chip 232. Reflection diaphragm 240 is arranged on substrate 231. LED chip 232 and substrate 231 are respectively placed in the both sides of reflection diaphragm 240, and the light that LED chip 232 sends is reflected diaphragm 240 and reflexes to display module 210. Wherein, diffuser plate 211 is the plane of incidence of light, and display screen 211 is the exiting surface of light.
Wherein, luminescence component 230 has multiple, and multiple luminescence components 230 are the corresponding subregional multiple positions of display screen 211 respectively, the LED chip 232 of display screen 211 subregional multiple positions correspondence difference luminous flux and beam angle.
Specifically in the present embodiment, the aluminium base 231 that substrate 231 selects coefficient of heat transfer to be 2W/ DEG C. And, supporting back board 220 also selects the aluminium material of high coefficient of heat transfer. By substrate 231 is fitted in supporting back board 220, so that the heat that LED chip 232 produces carries out conduction of heat by substrate 231 and supporting back board 220, to accelerate the heat radiation of LED chip 232.
It is to be noted, above-mentioned display screen 211 can be 2D, bore hole 3D or spectacle 3D display screen, to different types of display screen, all conceptual design can be carried out by the mixed pearl method of matching of above-mentioned LED so that display screen 211 has higher display brightness and show uniformity.
The mixed pearl of the LED of above-mentioned backlight module 200 matches method by the different subregions of display screen 211 mate the LED chip 232 of different luminous flux and beam angle, luminance difference caused by the difference of the light transmittance of diverse location existence on display screen 211 is made up by LED chip 232, the brightness of diverse location on display screen 211 is finely tuned, it is achieved the homogenization of display screen 211 display brightness.
Matched the obtained backlight module of method 200 by the mixed pearl of above-mentioned LED and there is higher brightness, reliability and uniformity. And the display screen 211 in backlight module 200 can be 2D, bore hole 3D or spectacle 3D display screen, to different types of display screen 211, higher display brightness and show uniformity all can be obtained by said method, light-emitting uniformity can be brought up to more than 95%, it is achieved that high definition or ultra high-definition show.
Certainly, the method of the present invention not only may be used in single display module the profile adjustment of LED in backlight module, can be also used on large-area integral LED display screen, the LED of each position is shown that module carries out subregion backlight adjustment, in order to enable large-area integral LED display screen to reach to meet the light transmittance of demand.
Each technical characteristic of above example can combine arbitrarily, for making description succinct, all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics is absent from contradiction, all it is considered to be the scope that this specification is recorded.
Above example only have expressed the several embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent. It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation and improvement, these broadly fall into protection scope of the present invention. Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a printing opacity uniformity detection system, it is characterised in that including:
Light source module, for sending the incident ray of brightness uniformity;
Be respectively placed in the both sides of described printing opacity monitor station for installing the printing opacity monitor station of display screen, described display screen and described light source module, described incident ray is through obtaining emergent ray after described display screen;
Multiple sensors, the plurality of sensor is distributed on described display screen away from the side of described printing opacity monitor station, and each sensor is for detecting the emergent ray of the corresponding position of described display screen, it is thus achieved that the brightness that described relevant position is corresponding; And
The message handler being connected with described sensor, for recording described brightness and the corresponding relation of multiple positions on display screen, forms the first incidence relation table between multiple positions and described brightness on described display screen.
2. printing opacity uniformity according to claim 1 detection system, it is characterised in that described message handler is additionally operable to described brightness is converted into light transmittance, forms the second incidence relation table between multiple positions and described light transmittance on described display screen.
3. printing opacity uniformity according to claim 1 and 2 detection system, it is characterized in that, the printing opacity uniformity detection system of described display screen also includes display module, and at least one in following information is carried out visualization by described display module and show by described message handler:
The relative position of described sensor, described printing opacity monitor station and described light source module;
Described first incidence relation table; And
Described second incidence relation table.
4. the mixed pearl of the LED of a backlight module matches method, it is characterised in that including:
Detecting step: irradiate the incidence surface of described display screen with uniform incident ray, exiting surface side subregion at described display screen gathers the emergent ray of multiple positions outgoing, obtain the brightness that on described display screen, multiple positions are corresponding, and it is translated into light transmittance, constitute the incidence relation between multiple positions and described light transmittance on described display screen;
Calculation procedure: according to brightness of display screen value, specified light transmittance, display area, the number of LED chip, relation between the parameter factors that the luminous flux of single led chip unit are is relevant with the translucent effect of display screen surface attaching membrane module, according to target setting brightness value, the specified light transmittance of described display screen, the quantity of the LED chip set, the luminous flux of the single led chip unit are set and the display area of described display screen, calculate described display screen surface and attach the relevant parameter factors of translucent effect of membrane module to influence coefficient produced by the brightness of described display screen,
Mashed up step: attach the relevant parameter factors of translucent effect of the membrane module display area to incidence relation between multiple positions and described light transmittance on influence coefficient, described display screen produced by the brightness of described display screen and described display screen according to target setting brightness value, the quantity of the LED chip of setting, described display screen surface, determine the luminous flux of multiple LED chips corresponding with multiple positions on described display screen on backlight module one by one, wherein, on described display screen, the luminous flux of multiple LED chips that multiple positions are corresponding is different.
5. the mixed pearl of the LED of backlight module according to claim 4 matches method, it is characterised in that described detecting step at least one of comprises the steps:
Subregion on described display screen, and it is correspondingly arranged described sensor at interval vertex position, for detecting described incident ray through the emergent ray after described display screen, obtain the brightness that described vertex position is corresponding, using vertex positions multiple on described display screen as the multiple positions on described display screen;
Brightness corresponding for vertex positions multiple on described display screen is converted into light transmittance, it is thus achieved that the light transmittance that on described display screen, multiple vertex positions are corresponding, constitutes the incidence relation between multiple vertex positions and described light transmittance on described display screen.
6. the mixed pearl of the LED of backlight module according to claim 4 matches method, it is characterised in that
In described calculation procedure, the parameter factors that the translucent effect of display screen surface attaching membrane module is relevant is diffuser plate, the first diffusion barrier sheet, the first prism film, the second prism film, prism film and the second diffusion barrier sheet;
Display screen surface attaches the product that influence coefficient produced by the brightness of described display screen is the light transmittance of diffuser plate, the light transmittance of the first diffusion barrier sheet, the rate of adding lustre to of the first prism film, the rate of adding lustre to of the second prism film, the rate of adding lustre to of prism film, the light transmittance of the second diffusion barrier sheet, distance influence coefficient between LED chip and diffuser plate and other correction factors by the relevant parameter factors of translucent effect of membrane module.
7. the mixed pearl of the LED of backlight module according to claim 4 matches method, it is characterised in that described mashed up step also includes:
Luminous flux according to multiple LED chips corresponding to positions multiple on described display screen, it is determined that the LED chip of different beam angles, it is determined that distance between multiple LED lamp bar that multiple described LED chips are formed and distance between described LED chip in described LED lamp bar.
8. the mixed pearl of the LED of backlight module according to claim 4 matches method, it is characterised in that described mashed up step also includes:
Luminous flux according to multiple LED chips corresponding to positions multiple on described display screen, it is determined that series-parallel circuit connected mode between multiple LED lamp bar that multiple described LED chips are formed and the series-parallel circuit connected mode of described LED chip in described LED lamp bar.
9. a backlight module, it is characterised in that including:
The display module of plate-like structure, described display module include display screen and display screen surface attach membrane module and, described surface attaches membrane module and is attached on described display screen;
Supporting back board, is arranged with described display module parallel interval, and described supporting back board is disposed far from the side of described display screen;
Luminescence component, it is arranged in described supporting back board, and it is just right with described display module, described luminescence component includes substrate, LED chip and cell-shell, described substrate is fixed on described substrate, described LED chip is located on described substrate, and electrically connects with described substrate, and described cell-shell is covered on described LED chip; And
Reflection diaphragm, described reflection diaphragm is arranged on described substrate, described LED chip and described substrate are respectively placed in the both sides of described reflection diaphragm, the light that described LED chip sends reflexes to described display module through described reflection diaphragm, it is the incidence surface of light that described display screen surface attaches membrane module, and described display screen is the exiting surface of light;
Wherein, described luminescence component has multiple, and multiple described luminescence components distinguish multiple subregions of corresponding described display screen, the different subregion correspondence difference luminous fluxes of described display screen and/or the described LED chip of beam angle.
10. backlight module according to claim 9, it is characterized in that, described display screen surface attaches membrane module and includes diffuser plate, the first diffusion barrier sheet, the first prism film, the second prism film, prism film and the second diffusion barrier sheet, described diffuser plate, described first diffusion barrier sheet, described first prism film, described second prism film, described prism film and described second diffusion barrier sheet set gradually, and described second diffusion barrier sheet is connected with described display screen.
Priority Applications (1)
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