CN105628344B - Backlight module and its light transmission uniformity detection system and its LED mix pearl matching method - Google Patents
Backlight module and its light transmission uniformity detection system and its LED mix pearl matching method Download PDFInfo
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- CN105628344B CN105628344B CN201610070551.4A CN201610070551A CN105628344B CN 105628344 B CN105628344 B CN 105628344B CN 201610070551 A CN201610070551 A CN 201610070551A CN 105628344 B CN105628344 B CN 105628344B
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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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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
The present invention relates to backlight module and its light transmission uniformity detection systems and its LED to mix pearl matching method.LED mixes the pearl method of matching and includes detecting step, calculates step and mashed up step.Above-mentioned LED mixes pearl matching method by selecting multiple LED chips of different luminous fluxes and/or beam angle corresponding with multiple positions on display screen, luminance difference caused by be had differences to display screen due to the light transmittance of different location is made up, the brightness of different location on display screen is finely adjusted, the display brightness of display screen is homogenized.Simultaneously, display screen can be 2D, naked eye 3D or spectacle 3D display screen, the display brightness uniformity of display screen can be increased to 95% or more by the above method, it realizes high definition or ultra high-definition is shown, so that backlight module brightness with higher, reliability and uniformity, to be satisfied with the combination product or single machine product that have higher requirements to uniformity, such as monitoring room mosaic screen or single machine and mosaic screen advertisement machine or single machine.
Description
Technical field
The present invention relates to field of display technology, more particularly to a kind of backlight module and its light transmission uniformity detection system and
Its LED mixes pearl and matches method.
Background technique
Currently, more and more occasions need to be used to using large-scale LED display module with the fast development of technology
Show advertising information, commodity display information, conferencing information etc..And common display module is usually logical in certain big size
It often will lead to the decline of screen transmission uniformity.Also, for the combination of large area, advertisement screen etc., need by multiple common
Display module is spliced to form, but since splicing effect is unable to reach perfect building, then can make large area combination,
The uniformity that advertisement screen etc. integrally goes out light can be declined, so needing further to solve asking for full screen light-emitting uniformity
Topic.
Of course, it is also possible to need constantly to attach on a display screen because display module is to realize different display effects
The film of different function, and the interaction of each film, so that the incident light that backlight module is launched passes through after display screen, not
The light-out effect of consistency can be obtained, so that display brightness is not uniform enough, is unable to satisfy the skill for further increasing light-emitting uniformity
Art requirement, the picture quality sense for not only directly resulting in display is poor, also affects the Experience Degree of user, reduces the city of product
Field competitiveness.
Summary of the invention
Based on this, it is necessary to provide a kind of more uniform backlight module of display brightness and its light transmission uniformity detection system
And its LED mixes pearl and matches method.
A kind of light transmission uniformity detection system, comprising:
Light source module, for issuing the incident ray of brightness uniformity；
For installing the light transmission monitor station of display screen, the display screen and the light source module are respectively placed in the light transmission inspection
The two sides of scaffold tower, the incident ray obtain emergent ray after penetrating the display screen；
Multiple sensors, the multiple sensor are distributed in the side on the display screen far from the light transmission monitor station,
Each sensor is used to detect the emergent ray of the corresponding position of the display screen, and it is corresponding bright to obtain the corresponding position
Degree；And
The message handler being connected with the sensor, for recording pair of multiple positions on the brightness and display screen
It should be related to, form the first incidence relation table on the display screen between multiple positions and the brightness.
A kind of LED of backlight module mixes pearl and matches method, comprising:
Detecting step: irradiating the incidence surface of the display screen with uniform incident ray, in the light-emitting surface of the display screen
Side subregion acquires the emergent ray being emitted at multiple positions, obtains the corresponding brightness in multiple positions on the display screen, and will
It is converted into light transmittance, constitutes the incidence relation on the display screen between multiple positions and the light transmittance；
Calculate step: according to brightness of display screen value, specified light transmittance, display area, the number of LED chip, single led core
The luminous flux and display screen surface of piece unit area attach the relationship between the related parameter factors of translucent effect of membrane module, root
According to setting target brightness value, the specified light transmittance of the display screen, the quantity of the LED chip of setting, setting single led chip
The display area of the luminous flux of unit area and the display screen calculates the light transmission effect that the display screen surface attaches membrane module
The related parameter factors of fruit influence coefficient to caused by the brightness of the display screen；
Mashed up step: film is attached according to setting target brightness value, the quantity of the LED chip of setting, the display screen surface
The related parameter factors of the translucent effect of component are on more on influence coefficient, the display screen caused by the brightness of the display screen
The display area of incidence relation and the display screen between a position and the light transmittance, one by one determine backlight module on
The luminous flux of the corresponding multiple LED chips in multiple positions on the display screen, wherein multiple positions are opposite on the display screen
The luminous flux for the multiple LED chips answered is different.
A kind of backlight module, comprising:
The display component of plate-like structure, the display component include display screen and display screen surface attach membrane module and,
The surface attaches membrane module and is attached on the display screen；
Supporting back board, is arranged with the display component parallel interval, and the supporting back board is disposed far from the display screen
Side；
Luminescence component is set in the supporting back board, and with the display component face, the luminescence component includes base
Plate, LED chip and blister, the substrate are fixed on the substrate, the LED chip be set to the substrate on, and with it is described
Substrate electrical connection, the blister are covered on the LED chip；And
Reflection diaphragm, the reflection diaphragm are set on the substrate, and the LED chip and the substrate are respectively placed in institute
The two sides of reflection diaphragm are stated, the light that the LED chip issues reflexes to the display component through the reflection diaphragm, described aobvious
Display screen surface attaches the incidence surface that membrane module is light, and the display screen is the light-emitting surface of light；
Wherein, the luminescence component has multiple, and multiple luminescence components respectively correspond multiple subregions of the display screen,
The different subregions of the display screen correspond to the LED chip of different luminous fluxes and/or beam angle.
Above-mentioned light transmission uniformity detection system is by carrying out Subarea detecting to display screen, to obtain different subregions on display screen
The brightness of upper multiple positions or light transmittance.
The LED of above-mentioned backlight module mixes pearl and matches method, using above-mentioned light transmission uniformity detection system, is walked by detection
Suddenly, step and mashed up step are calculated, selects the LED chip of different luminous fluxes corresponding with multiple positions of display screen, to aobvious
Luminance difference caused by display screen is had differences due to the light transmittance of different location is made up, to different location on display screen
Brightness is finely adjusted, and homogenizes the display brightness of display screen, while but also manufacturing cost is minimum.
Pearl is mixed by above-mentioned LED and matches the obtained backlight module of method brightness, reliability and uniformity with higher.And
And the display screen in backlight module can be 2D, naked eye 3D or spectacle 3D display screen, to different types of display screen, by upper
Higher display brightness and show uniformity can be obtained by stating method, and brightness uniformity can be increased to 95% or more, be realized
High definition or ultra high-definition are shown.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the light transmission uniformity detection system of one embodiment of the invention；
Fig. 2 is that the mixed pearl of LED of the backlight module of one embodiment of the invention matches method flow diagram；
Fig. 3 is the structural schematic diagram for carrying out region division in detecting step shown in Fig. 2 to display screen；
Fig. 4 is the structural schematic diagram laid in mashed up step shown in Fig. 2 to LED chip；
Fig. 5 is the back light module unit structure schematic diagram of one embodiment of the invention；And
Fig. 6 is the structural schematic diagram in Fig. 5 at A.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give better embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more the disclosure
Add thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more
Any and all combinations of relevant listed item.
As shown in Figure 1, the light transmission uniformity detection system 100 of one embodiment of the invention, be mainly used for display screen into
Row brightness detection.Light transmission uniformity detection system 100 include light source module 110, light transmission monitor station 120, multiple sensors 130,
Message handler 140 and display module 150.
Light source module 110 is used to issue the incident ray of brightness uniformity.Specifically in the present embodiment, light source module 110 can
Think the uniform fluorescent lamp of emitting brightness.In other embodiments, light source module 110 can be the emergent light of any other type
The lamps and lanterns of line brightness uniformity.
Display screen is installed on light transmission monitor station 120, and display screen and light source module 110 are respectively placed in light transmission monitor station
120 two sides, the incident ray issued from light source module 110 obtain emergent ray after penetrating display screen.Light transmission monitor station 120 can
Think the desktop with a transparent glass, or can also be the support frame with a hollow out desktop, it is to be detected aobvious for fixing
Display screen makes display location in the light for being used to receive the brightness uniformity injected from incidence surface on light transmission monitor station 120.
Multiple sensors 130 are distributed in the side on display screen far from light transmission monitor station 120, and each sensor 130 is used for
The emergent ray of the corresponding position of display screen is detected, the corresponding brightness in corresponding position is obtained.For example, dividing display screen
Sensor is arranged in multiple vertex positions of subregion in area.
Message handler 140 is connected with sensor 130.Message handler 140 is more on brightness and display screen for recording
The corresponding relationship of a position forms the first incidence relation table on display screen between multiple positions and brightness.
Moreover, message handler 140 is also used to convert brightness to light transmittance, multiple positions and light transmission on display screen are formed
The second incidence relation table between rate.
Message handler 140 is by display module 150 to sensor 130, light transmission monitor station 120 and light source module 110
Relative position, at least one of information such as the first incidence relation table and the second incidence relation table carry out visualization display.
Specifically, sensor 130 includes that picture obtains module (not shown) and is connected with picture acquisition module (not shown)
The image processing module connect.Image processing module is connected with message handler 140.Wherein, picture obtains module and obtains display
The brightness picture of screen, and the brightness picture of display screen is sent to image processing module.Image processing module is according to brightness picture
It determines the brightness of display screen, and the luminance information of display screen is sent to message handler 140.Sensor 130 can also be bright
Detection sensor is spent, or is also based on the testing result of luminance sensor or illuminance transducer and is obtained accordingly to convert
Brightness.
Above-mentioned light transmission uniformity detection system 100 can carry out brightness detection to display screen, and the brightness that will test turns
Turn to light transmittance.It should be pointed out that light transmittance is obtained by outgoing brightness and the ratio of incident brightness.Specifically in the present embodiment
In, light transmission uniformity detection system 100 is detected respectively to multiple positions on multiple sections preset on display screen, with
Obtain the brightness of multiple positions on display screen.At this point, light transmittance corresponding to multiple positions is examined by corresponding position on display screen
The ratio of the incident brightness of the brightness and corresponding position of survey obtains.
In conjunction with shown in Fig. 1 and Fig. 2, pearl is mixed the present invention also provides a kind of LED of backlight module and matches method, utilization is above-mentioned
Light transmission uniformity detection system 100, matched design is carried out to display screen and LED chip, so that the brightness of backlight module is each
Section is consistent, so that display screen has more uniform display brightness, by the whole light-emitting uniformity of straight-down negative display screen
It is increased to 95% or more, remote superstate standard.
Specifically in the present embodiment, the LED of backlight module mixes the pearl method of matching and includes detecting step, calculates step and mashed up
Step.
In detecting step, the incidence surface of display screen is irradiated with uniform incident ray, in the light-emitting surface side of display screen
Subregion acquires the emergent ray being emitted at multiple positions, obtains the corresponding brightness in multiple positions on display screen, and be translated into
Light transmittance constitutes the incidence relation on display screen between multiple positions and light transmittance.
In conjunction with shown in Fig. 1 to Fig. 3, specifically, completing detecting step using above-mentioned light transmission uniformity detection system 100.
First subregion is carried out to display screen, using vertex positions multiple on display screen as multiple positions on display screen.On the top in section
Point position is correspondingly arranged sensor 130, and incident ray is detected by sensor 130 through the emergent ray after display screen, is obtained
The corresponding brightness of vertex position where sensor 130, and then obtain the corresponding brightness of multiple vertex positions on display screen.It is logical
The detection for crossing light transmission uniformity detection system 100 can be apparent from multiple positions on each region divided on display screen
The size relation of mutual brightness.
Specifically in this example it is shown that screen is rectangular flat plate structure.It is assumed that the length of display screen is W, width H.
In detecting step, display screen is divided into 16 regions first, obtains 9 vertex.Moreover, wherein 4 vertex distance long sides
Distance be H/9, the distance apart from broadside is W/9.Further, the midpoint of the line of any two point in this 4 points is selected,
It obtains at 5 points, and then the position of 9 points has been determined.It is respectively arranged sensor 130 on the position of this 9 points, and then passes through inspection
Measure the brightness at this 9 points.
By the brightness of 9 apexes, light transmittance can be obtained by conversion, obtains this 9 vertex positions on display screen
Corresponding light transmittance constitutes the incidence relation on display screen between multiple vertex positions and light transmittance.
In calculating step, according to brightness of display screen value, specified light transmittance, display area, the number of LED chip, single
The luminous flux and display screen surface of LED chip unit area attach the pass between the related parameter factors of translucent effect of membrane module
System, according to setting target brightness value, the specified light transmittance of display screen, the quantity of the LED chip of setting, setting single led core
The luminous flux of piece unit area and the display area of display screen, the translucent effect for calculating display screen surface attaching membrane module are related
Parameter factors on influencing coefficient caused by the brightness of display screen.
It should be pointed out that setting target brightness value as X, the specified light transmittance of display screen is b, the LED chip of setting
Quantity is N, and for the luminous flux of the single led chip unit area set as Y, the display area of display screen is S, display screen surface patch
The related parameter factors of the translucent effect of membrane component are a on influence coefficient caused by the brightness of display screen.By object brightness
It is luminous flux and display screen surface attaching film on S that value X, which is equal to the specified light transmittance of display screen, N number of LED chip in display area,
The related parameter factors of the translucent effect of component can further obtain the product of influence coefficient caused by the brightness of display screen
It arrives, display screen surface attaches the related parameter factors of translucent effect of membrane module to influencing coefficient caused by the brightness of display screen
A is specifically calculated by following formula:
It should be pointed out that the related parameter factors of translucent effect that display screen surface attaches membrane module are specially to spread
Plate, the first diffusion barrier sheet, the first prism film, the second prism film, third prism film and the second diffusion barrier sheet.Display screen surface attaches
The related parameter factors of the translucent effect of membrane module are the light transmittance of diffuser plate on influence coefficient a caused by the brightness of display screen
K1, the light transmittance k2 of the first diffusion barrier sheet, the rate z1 that adds lustre to of the first prism film, the second prism film the rate z2 that adds lustre to, third prism
The distance between the rate z3 that adds lustre to of film, light transmittance k3, LED chip and the diffuser plate of the second diffusion barrier sheet influence coefficient a1 and other
The product of correction factor a2, i.e.,
A=k1k2k3z1z2z3a1a2
In mashed up step, film is attached according to setting target brightness value, the quantity of the LED chip of setting, display screen surface
The related parameter factors of the translucent effect of component on multiple positions on influence coefficient, display screen caused by the brightness of display screen with
The display area of incidence relation and display screen between light transmittance determines opposite with positions multiple on display screen on backlight module
The luminous flux for the multiple LED chips answered, wherein the luminous flux of the corresponding multiple LED chips in multiple positions is different on display screen.
Specifically, setting target brightness value as X, light transmittance corresponding to a vertex position of display screen is b ', setting
The quantity of LED chip be N, the display area of display screen is S, attaches film according to the display screen surface that above-mentioned calculating step obtains
The related parameter factors of the translucent effect of component are equal to influence coefficient a caused by the brightness of display screen by target brightness value X
The light transmittance of corresponding position, N number of LED chip are luminous flux and display screen surface attaching film on S in display area on display screen
The related parameter factors of the translucent effect of component can further obtain the product of influence coefficient caused by the brightness of display screen
It arrives, the luminous flux Y ' on display screen at vertex position on corresponding single led chip unit area is specifically calculated by following formula:
Using the light transmittance of vertex positions multiple on display screen, calculated one by one by the above method, it is available more
The luminous flux of multiple LED chips corresponding to a vertex position.LED chip corresponding to the different multiple apexes of light transmittance
There is also differences for luminous flux.
It can make the display brightness of multiple positions of display screen that can reach target value by the above method, and then to aobvious
The display brightness at multiple positions that light transmittance has differences in display screen is finely adjusted, so that display screen display brightness is realized uniformly
Change, improves display effect.
As shown in figure 4, specifically, can also be corresponded to according to positions multiple on display screen obtained above in mashed up step
Multiple LED chips luminous flux, can determine the LED chip of different beam angles, determine that multiple LED chips are formed multiple
The distance between LED chip J1 in the distance between LED light bar J2 and LED light bar.
By cost calculation, the suitable LED chip of beam angle can choose, and to multiple LED light bars that LED chip is formed
The distance between and LED light bar in the distance between LED chip be finely adjusted respectively so that the case where meeting brightness demand
Under, keep manufacturing cost lower.
In mashed up step, according to the luminous flux of LED chip, multiple LED light bars that multiple LED chips are formed can also be determined
Between series-parallel circuit connection type and LED light bar in LED chip series-parallel circuit connection type.Specifically, can incite somebody to action
The consistent LED chip series connection of luminous flux in LED light bar, and the different LED chip of luminous flux is subjected in parallel or mixed connection.Moreover,
The consistent LED light bar of multiple luminous fluxes is connected, and the different LED light bar of luminous flux is subjected in parallel or mixed connection.
It is designed in series and parallel by carrying out circuit to the LED chip in LED light bar and LED light bar, to obtain reasonable circuit
Connection structure, and then simplify the complexity of circuit connection.Meanwhile but also the outgoing brightness of display screen is kept in different subregions
Unanimously, and then the more uniform picture of brightness is obtained.
It should be pointed out that the selection for LED chip, needs under the life situations of setting, light decay is selected to be lower than
30% LED chip, specifically in the present embodiment, the service life of the LED chip set is 50,000 hour.
In conjunction with shown in Fig. 3 to Fig. 6, the present invention also provides one kind to match the obtained backlight module of method by above-mentioned mixed pearl
200.Backlight module 200 includes display component 210, supporting back board 220, luminescence component 230 and reflection diaphragm 240.
Display component 210 is plate-like structure.Display component 210 includes that display screen 211 and display screen surface attach film group
Part 212.Wherein display screen surface attaches membrane module 212 and is attached on display screen 211.Specifically in this example it is shown that screen table
Face paste membrane component 212 includes diffuser plate 213, the first diffusion barrier sheet 214, the first prism film 215, the second prism film 216, third
Prism film 217, the second diffusion barrier sheet 218.Diffuser plate 213, the first diffusion barrier sheet 214, the first prism film 215, the second prism film
216, third prism film 217, the second diffusion barrier sheet 218 are set gradually, and the second diffusion barrier sheet 218 is connected with display screen 211.
Supporting back board 220 and 210 parallel interval of display component are arranged.Supporting back board 220 is disposed far from the one of display screen 211
Side.
Luminescence component 230 is set in supporting back board 220, and with 210 face of display component.Luminescence component 230 includes base
Plate 231, LED chip 232 and blister 233.Substrate 231 is fixed on substrate 231, and LED chip 232 is set on substrate 231, and with
Substrate 231 is electrically connected, and blister 233 is covered on LED chip 232.Reflection diaphragm 240 is set on substrate 231.LED chip 232
And substrate 231 is respectively placed in the two sides of reflection diaphragm 240, the light that LED chip 232 issues reflexes to aobvious through reflection diaphragm 240
Show component 210.Wherein, diffuser plate 211 is the plane of incidence of light, and display screen 211 is the light-emitting surface of light.
Wherein, luminescence component 230 has multiple, and multiple luminescence components 230 respectively correspond the subregional multiple positions of display screen 211
It sets, the subregional multiple positions of display screen 211 correspond to the LED chip 232 of different luminous fluxes and beam angle.
Specifically in the present embodiment, substrate 231 selects coefficient of heat transfer for 2W/ DEG C of aluminum substrate 231.Moreover, supporting back board
220 also select the aluminium material of high coefficient of heat transfer.By the way that substrate 231 to be fitted in supporting back board 220, so that LED chip 232 produces
Raw heat carries out heat transfer by substrate 231 and supporting back board 220, to accelerate the heat dissipation of LED chip 232.
It should be pointed out that above-mentioned display screen 211 can be 2D, naked eye 3D or spectacle 3D display screen, to different type
Display screen, pearl can be mixed by above-mentioned LED method is matched carrying out conceptual design, so that display screen 211 is with higher aobvious
Show brightness and show uniformity.
It is logical by the way that the different subregions matching of display screen 211 is not shared the same light that the mixed pearl of the LED of above-mentioned backlight module 200 matches method
The LED chip 232 of amount and beam angle, so that difference of the LED chip 232 to light transmittance existing for different location on display screen 211
Caused luminance difference is made up, and is finely adjusted to the brightness of different location on display screen 211, realizes that display screen 211 is aobvious
Show the homogenization of brightness.
By above-mentioned LED mix pearl match the brightness with higher of the obtained backlight module 200 of method, reliability and uniformly
Property.And the display screen 211 in backlight module 200 can be 2D, naked eye 3D or spectacle 3D display screen, to different types of aobvious
Display screen 211 can obtain higher display brightness and show uniformity by the above method, light-emitting uniformity can be increased to
95% or more, it realizes high definition or ultra high-definition is shown.
Certainly, method of the invention not only can be used for the profile adjustment of LED in backlight module in single display module, also
It can be used on the integral LED display screen of large area, the adjusting of subregion backlight carried out to the LED display module of each position, to
The integral LED display screen of large area is set to reach the light transmittance of meet demand.
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
Only several embodiments of the present invention are expressed for above embodiments, and the description thereof is more specific and detailed, but can not
Therefore it is construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art,
Under the premise of not departing from present inventive concept, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (5)
1. a kind of LED of backlight module mixes pearl and matches method characterized by comprising
Detecting step: the incidence surface of display screen is irradiated with uniform incident ray, in the light-emitting surface side subregion of the display screen
The emergent ray being emitted at multiple positions is acquired, obtains the corresponding brightness in multiple positions on the display screen, and be translated into
Light transmittance constitutes the incidence relation on the display screen between multiple positions and the light transmittance；
Calculate step: according to brightness of display screen value, specified light transmittance, display area, the number of LED chip, single led chip list
The luminous flux and display screen surface of plane product attach the relationship between the related parameter factors of translucent effect of membrane module, according to setting
Set the goal brightness value, the specified light transmittance of the display screen, the quantity of the LED chip of setting, the single led chip unit of setting
The display area of the luminous flux of area and the display screen, calculating the translucent effect that the display screen surface attaches membrane module has
The parameter factors of pass influence coefficient to caused by the brightness of the display screen；
Mashed up step: membrane module is attached according to setting target brightness value, the quantity of the LED chip of setting, the display screen surface
The related parameter factors of translucent effect on multiple positions on influence coefficient, the display screen caused by the brightness of the display screen
Set the display area of the incidence relation and the display screen between the light transmittance, one by one determine backlight module on it is described
The luminous flux of the corresponding multiple LED chips in multiple positions on display screen, wherein multiple positions are corresponding on the display screen
The luminous flux of multiple LED chips is different.
2. the LED of backlight module according to claim 1 mixes pearl and matches method, which is characterized in that the detecting step is extremely
One of include the following steps less:
Subregion on the display screen, and the vertex position in section is correspondingly arranged sensor, for detecting the incident ray
Through the emergent ray after the display screen, the corresponding brightness of the vertex position is obtained, by vertex multiple on the display screen
Position is as multiple positions on the display screen；
Light transmittance is converted by the corresponding brightness of vertex positions multiple on the display screen, obtains multiple vertex on the display screen
The corresponding light transmittance in position, constitutes the incidence relation on the display screen between multiple vertex positions and the light transmittance.
3. the LED of backlight module according to claim 1 mixes pearl and matches method, which is characterized in that
In the calculating step, the related parameter factors of translucent effect that display screen surface attaches membrane module are diffuser plate, first
Diffusion barrier sheet, the first prism film, the second prism film, third prism film and the second diffusion barrier sheet；
Display screen surface attaches shadow caused by brightness of the related parameter factors of translucent effect of membrane module to the display screen
Ring the increasing of rate of adding lustre to, the second prism film that coefficient is the light transmittance of diffuser plate, the light transmittance of the first diffusion barrier sheet, the first prism film
The distance between light rate, the rate of adding lustre to of third prism film, the light transmittance of the second diffusion barrier sheet, LED chip and diffuser plate influence system
Several and other correction factors products.
4. the LED of backlight module according to claim 1 mixes pearl and matches method, which is characterized in that the mashed up step is also
Include:
According to the luminous flux of the corresponding multiple LED chips in positions multiple on the display screen, the LED core of different beam angles is determined
Piece, determine in the distance between multiple LED light bars that multiple LED chips are formed and the LED light bar LED chip it
Between distance.
5. the LED of backlight module according to claim 1 mixes pearl and matches method, which is characterized in that the mashed up step is also
Include:
According to the luminous flux of the corresponding multiple LED chips in positions multiple on the display screen, determine that multiple LED chips are formed
Multiple LED light bars between series-parallel circuit connection type and the LED light bar in the LED chip series-parallel circuit connect
Connect mode.
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| CN103617776B (en) * | 2013-11-27 | 2016-04-13 | 广东威创视讯科技股份有限公司 | Brightness of display screen uniformity adjusting method and system |
| CN204116744U (en) * | 2014-08-07 | 2015-01-21 | 中航华东光电有限公司 | Liquid crystal display side backlight illumination uniformity test centralized positioning frock |
| CN104896373B (en) * | 2015-06-08 | 2017-07-07 | 深圳市华星光电技术有限公司 | A kind of backlight module and liquid crystal display device |
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