CN109164641A - A kind of backlight module and display device - Google Patents
A kind of backlight module and display device Download PDFInfo
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- CN109164641A CN109164641A CN201811276008.5A CN201811276008A CN109164641A CN 109164641 A CN109164641 A CN 109164641A CN 201811276008 A CN201811276008 A CN 201811276008A CN 109164641 A CN109164641 A CN 109164641A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Nonlinear Science (AREA)
- Liquid Crystal (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a kind of backlight module and display devices, are related to field of display technology.In embodiments of the present invention, light modulation zoning is divided into compensation light modulation area and normal light modulation area, wherein, compensation light modulation area is arranged close to the fringe region of LED substrate, and the normal area that dims is arranged far from fringe region, and, in white light test phase, the light emission luminance in compensation light modulation area is identical as the normal light modulation light emission luminance in area, and compensates the quantity for the LED chip that light modulation area includes, less than the quantity for the LED chip that normal light modulation area includes；So, it is ensured that it is uniform in the light emission luminance that test phase respectively dims area, the luminance difference between fringe region and intermediate region is reduced, to be conducive to the display effect for improving liquid crystal display during actual display.
Description
Technical field
The present invention relates to field of display technology, espespecially a kind of backlight module and display device.
Background technique
Liquid crystal display is a kind of non-spontaneous light device, needs to provide backlight by backlight module, to realize aobvious
Show function.Currently, mostly use the LED substrate for being provided with multiple mini LED chips being arranged in array to constitute backlight module,
This kind of backlight module can make liquid crystal display have effect screen, and display picture more exquisiteness of high dynamic range etc.
Feature.
However, due to the aggregation sex differernce of light, so that the fringe region of LED substrate and intermediate region be there are luminance difference,
Cause the light emission luminance of entire backlight module uneven, influences display effect.So, this species diversity how is reduced, display is improved
Effect is those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
The embodiment of the invention provides a kind of backlight module and display devices, and the display to improve liquid crystal display is imitated
Fruit.
In a first aspect, the embodiment of the invention provides a kind of backlight module, including LED substrate, the LED substrate include more
A LED chip；The LED substrate includes multiple light modulation areas, and the light modulation area includes at least one described LED chip；
Multiple light modulation areas include: close to the compensation light modulation areas and separate that the fringe region of the LED substrate is arranged
The normal light modulation area of the fringe region setting；
In white light test phase, the light emission luminance in compensation light modulation area, equal to the light emission luminance in the normal light modulation area,
And the compensation dims the quantity for the LED chip that area includes, the LED chip for including less than the normal light modulation area
Quantity.
Second aspect, the embodiment of the invention provides a kind of display devices, comprising: display panel and such as present invention are in fact
The above-mentioned backlight module of example offer is provided.
The present invention has the beneficial effect that:
A kind of backlight module provided in an embodiment of the present invention and display device are divided into compensation light modulation area by that will dim zoning
Area is dimmed with normal, and is made in white light test phase, the light emission luminance and the normal light emission luminance for dimming area in compensation light modulation area
It is identical, it is ensured that it is uniform in the light emission luminance that test phase respectively dims area, it reduces bright between fringe region and intermediate region
Difference is spent, to be conducive to the display effect for improving liquid crystal display during actual display.
Detailed description of the invention
Fig. 1 is when the area of each LED chip provided in the embodiment of the present invention is all the same and LED substrate is orthogonal rectangle
Structural schematic diagram；
Fig. 2 is when the area of each LED chip provided in the embodiment of the present invention is all the same and LED substrate is round rectangle
Structural schematic diagram；
Fig. 3 is when the area of each LED chip provided in the embodiment of the present invention is all the same and LED substrate is special shape
Structural schematic diagram；
Fig. 4 be the embodiment of the present invention in provide be provided with compensation LED chip one of the structural schematic diagram of LED substrate；
Fig. 5 is the enlarged diagram that the dotted line frame for being is marked in Fig. 4；
Fig. 6 be the embodiment of the present invention in provide be provided with compensation LED chip LED substrate partial structural diagram it
Two；
Fig. 7 is the enlarged diagram that the dotted line frame for being is marked in Fig. 6；
Fig. 8 is another enlarged diagram that the dotted line frame for being is marked in Fig. 6；
Fig. 9 and Figure 10 is respectively the structural schematic diagram of the display device provided in the embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing, to the specific embodiment party of a kind of backlight module provided in an embodiment of the present invention and display device
Formula is described in detail.It should be noted that described embodiments are only a part of the embodiments of the present invention, rather than it is complete
The embodiment in portion.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, shall fall within the protection scope of the present invention.
Inventor has found under study for action, usually can be in backlight module in order to improve the display effect of liquid crystal display
LED substrate carry out subregion setting, i.e., LED substrate is marked off into multiple light modulation areas, each light modulation area includes 3 × 3 LED cores
Piece or 6 × 6 LED chips, by way of local dimming, to reach the effect screen of high dynamic range, and it is more fine and smooth
Display picture.At the same time it can also providing the area source of high brightness for liquid crystal display panel, the brightness of backlight module is promoted, and
And by way of local dimming, the power consumption of backlight module can also be reduced, to reduce the power consumption of entire liquid crystal display.
However, due to the aggregation sex differernce of light, so that the fringe region of LED substrate and intermediate region be there are luminance difference,
I.e. the brightness of fringe region is significantly lower than intermediate region, causes vision upper edge region partially dark, final influence liquid crystal display
Display effect.
Therefore, the embodiment of the invention provides a kind of backlight modules, to reduce the brightness of fringe region and intermediate region
Difference improves the display effect of liquid crystal display.
Specifically, the embodiment of the invention provides a kind of backlight modules, as shown in Figures 1 to 8, wherein Fig. 1 is LED base
Plate is the structural schematic diagram when area of orthogonal rectangle and each LED chip is all the same, and it is round rectangle and each that Fig. 2, which is LED substrate,
The structural schematic diagram when area of LED chip is all the same, Fig. 3 are that the area that LED substrate is special shape and each LED chip is homogeneous
Structural schematic diagram simultaneously, Fig. 4 and Fig. 6 are the structural schematic diagram of LED substrate when being provided with compensation LED chip in LED substrate,
Fig. 5 is the enlarged diagram that the dotted line frame for being is marked in Fig. 4, and Fig. 7 is that the amplification for the dotted line frame for being is marked to illustrate in Fig. 6
Figure, Fig. 8 is another enlarged diagram that the dotted line frame for being is marked in Fig. 6.
Referring to shown in Fig. 1 to Fig. 8, backlight module may include LED substrate 1, and the LED substrate 1 includes multiple LED chips
(2 or 2a or 2b)；The LED substrate 1 includes multiple light modulation areas 3, and the light modulation area 3 includes at least one described LED chip (2
Or 2a or 2b), it is shown in Figure 1, part LED chip is illustrated only in figure, the light modulation area labeled as 3a0 includes a LED core
Piece 2 (2a), the light modulation area labeled as 3a1 and 3b include multiple LED chips 2 (2a)；
It is multiple it is described light modulation areas 3 include: close to the LED substrate 1 fringe region be arranged compensation light modulation area (such as 3a0,
3a1,3a2,3a3,3a4,3a5,3a6 and 3a7), and the normal light modulation area (such as 3b) far from fringe region setting；
In white light test phase, the hair of compensation light modulation area (such as 3a0,3a1,3a2,3a3,3a4,3a5,3a6 and 3a7)
Brightness, equal to it is described it is normal light modulation area 3b light emission luminance, and the compensation dim area (such as 3a0,3a1,3a2,3a3,3a4,
3a5,3a6 and 3a7) include the LED chip (2 or 2a or 2b) quantity, the institute for including less than the normal light modulation area 3b
State the quantity of LED chip (2 or 2a or 2b).
It in a practical situation, include 3 × 3 LED chips (as shown in figures 1 and 3) or 6 × 6 in each light modulation area
When LED chip (as shown in Figure 2) or M × N number of LED chip (not providing diagram), M and N are positive integer, each light modulation area
Overlay length laterally or longitudinally generally can be at 3 millimeters or more；Also, due to the aggtegation of light, edge can be made
The brightness in region is partially dark, if being calculated with An/An+1 > 3%, partially dark distance is about in 1.5 millis apart from LED substrate edge
Rice is between 2 millimeters.
Wherein, " An " in " An/An+1 > 3% " indicates test point, " An/An+1 > 3% " indicate current test point with
When brightness ratio between next test point is greater than 3%, it is believed that human eye can visually perceive the difference of brightness.Cause
This can determine partially dark regional scope by this kind of mode, to be conducive to division and setting to compensation light modulation area.
Therefore, the light modulation area of fringe region is arranged, using from the different set-up mode in light modulation area of intermediate region,
That is by the light modulation area of fringe region be referred to as compensate light modulation area (such as 3a0,3a1,3a2,3a3,3a4,3a5,3a6 and
3a7), the light modulation area of intermediate region is referred to as normal light modulation area 3b, and make compensation light modulation area (such as 3a0,3a1,3a2,
3a3,3a4,3a5,3a6 and 3a7) the LED chip quantity that includes is less than the quantity of the LED chip that normal light modulation area 3b includes, such as
Shown in Fig. 1 to Fig. 8, the luminance difference between fringe region and intermediate region can be advantageously reduced.To in actual display
In the process, be conducive to improve the display effect of liquid crystal display.
In the specific implementation, in embodiments of the present invention, it for the setting in compensation light modulation area and normal light modulation area, can adopt
It is arranged with mode 1 and 2 two ways of mode.
Mode 1: either compensation light modulation area, or area is normally dimmed, the area of each LED chip is equal.Such as Fig. 1
To shown in Fig. 3, the size of each LED chip in LED substrate 1 is equal, and for compensation light modulation area and normal light modulation
The difference in area is only that the quantity of included LED chip is different.
For example, with reference to shown in Fig. 1, includes a LED chip (2 or 2a) in the compensation light modulation area labeled as 3a0, be labeled as
The compensation light modulation area of 3a1 includes 3 LED chips (2 or 2a), the normal light modulation area labeled as 3b include 9 LED chips (2 or
2a), wherein the quantity for the LED chip (2 or 2a) that the normal light modulation area labeled as 3b includes, greater than flag are the compensation tune of 3a0
The quantity for the LED chip (2 or 2a) that light area includes, while the LED chip (2 for including also greater than the compensation light modulation area labeled as 3a
Or 2a) quantity.
In another example it is shown in Figure 3, it include 4 LED chips in the compensation light modulation area labeled as 3a4, labeled as 3a5's
Compensation light modulation area includes 2 LED chips, and the normal light modulation area labeled as 3b then includes 9 LED chips.
Also, it when the arrangement mode for the LED chip that normally light modulation area 3b includes is 3 × 3 (as shown in figures 1 and 3), mends
The arrangement mode for repaying the LED chip that light modulation area includes can be 1 × 3 (as shown in 3a1) or 3 × 1 or 2 × 1 (such as 3a5
It is shown), then or 2 × 2 (such as 3a2)；If the arrangement mode that the LED chip for including in normally light modulation area 3b is 6 × 6 is (such as
Shown in Fig. 2) when, the arrangement mode for the LED chip that compensation light modulation area includes can be 1 × 6 (as shown in 3a3) or 6 × 1, again
Or 7 × 1 (as shown in 3a2) etc..That is, the arrangement mode for the LED chip that compensation light modulation area includes, it can be according to specific
Depending on actual conditions, do not limit herein.
So set, may not need the total quantity for changing the LED chip (2 or 2a) being arranged in LED substrate 1, only need to change
The division methods in area are dimmed, therefore, this kind of set-up mode manufacture craft be simple, low manufacture cost and simple and easy, can be with
Light modulation area is flexibly divided according to the shape of LED substrate；At the same time it can also reduce between fringe region and intermediate region
Luminance difference is conducive to the display effect for improving liquid crystal display.
Also, in this way, in order to further improve the partially dark problem of fringe region brightness, in the present invention
In embodiment, driving current can also be configured.Specifically, in the white light test phase, area is dimmed to the compensation
In the LED chip input driving current, can be greater than to it is described it is normal light modulation area in the LED chip input drive
Streaming current.
This is because the negligible amounts for the LED chip that compensation light modulation area includes are adjusted in white light test phase if it is compensation
When the driving current that light area provides is identical as the driving current provided to normal light modulation area, can make compensation light modulation area brightness and
Normally light modulation area compares darker, therefore, in this mode, the driving current that area provides is dimmed by increasing to compensation, in white light
Test phase can effectively reduce the luminance difference between compensation light modulation area and normal light modulation area, and then effectively reduce marginal zone
Luminance difference between domain and intermediate region greatly improves the luminous homogeneity of LED substrate 1, to improve liquid crystal display
Display effect.
Specifically, the driving current that the LED chip into compensation light modulation area inputs, and to the normal light modulation
Ratio between the driving current of LED chip input in area, can be depending on specific actual conditions, as long as can protect
The driving current that the LED chip into compensation light modulation area inputs is demonstrate,proved, described in into the normal light modulation area
LED chip input driving current, and white light test phase normally dim area with compensation dim the light emission luminance in area it is consistent i.e.
Can, it does not limit herein.
Specifically, by taking the normal light modulation area that the label in Fig. 3 is as an example, to each LED chip and cathode in light modulation area
Connection relationship between signal wire and anode signal line is illustrated, for normally dimming area 3b, including 9 LED chips,
It can be connected in series with every 3 LED chips and form a LED chip group (such as z1), then three LED chip groups (such as z1) are in parallel even
It is connected between cathode signal line (such as A1) and anode signal line (such as K1).And area 3a4 is dimmed for compensation, it equally can be by two
Composition LED chip group (such as z2) is connected in series in LED chip, and then each LED chip group is being connected in parallel in cathode signal line (such as
A2) between anode signal line (such as K2).
Certainly, area is dimmed for compensation, it, can be using the compensation as being labeled as 3a4 when including that LED chip quantity is more
Dim area in each LED chip and cathode signal line and anode signal line between connection type, can also by each LED chip it
Between be connected in series between cathode signal line and anode signal line, alternatively, the LED chip that can also include by each LED chip group
Quantity be set as different, in short, can according to the actual situation depending on, do not limit herein.
It should be noted that the backlight module being arranged in the way of this kind, can be adapted for the display panel of any shape,
Such as rectangular display panel, triangle display panel, polygon display panel or the display panel with rounded corners, as long as making
The shape of the shape and display panel that obtain LED substrate 1 is consistent, if the shape of LED substrate 1 in backlight module is rectangle
(as shown in Figure 1), triangle, polygon or the shape (as shown in Figures 2 and 3) with rounded corners, do not limit herein.
Mode 2: for the display panel with on-right angle corner, LED substrate 1 can also be arranged to identical shape, i.e. LED
Substrate 1 also has on-right angle corner, at this point, if can make according to common partitioned mode close to the marginal zone of on-right angle corner
Luminance difference between domain and intermediate region is larger, may be such that generation sawtooth effect at on-right angle corner location, influences to show
Show effect.
Therefore, the luminance difference between the fringe region and intermediate region in order to be further reduced close on-right angle corner,
Improve sawtooth effect, can be in the lesser LED chip of fringe region setting area close to on-right angle corner, and intermediate region is adopted
The luminous homogeneity of LED substrate 1 is further increased to compensate to on-right angle corner location with normal LED chip.
Specifically, in embodiments of the present invention, described if Fig. 4 is to the partial structural diagram of LED substrate shown in Fig. 8
LED substrate 1 may include at least one on-right angle corner 4；Also, in this case, the LED chip 2 may include mending
Repay LED chip 2b, and normal LED chip 2a；The compensation LED chip 2b is set to the normal LED chip 2a close to institute
The side of on-right angle corner 4 is stated, the area of the compensation LED chip 2b is less than the area of the normal LED chip 2a；Compensation is adjusted
Light area (as shown in 3a6 and 3a7) includes at least one described compensation LED chip 2b, and the normal light modulation area 3b includes multiple institutes
State normal LED chip 2a.
It for the area of normal LED chip 2a, can be set to 150 microns × 500 microns, compensate the face of LED chip 2b
Product, can be set to 140 microns × 240 microns；Certainly, however it is not limited to this, normal LED chip 2a and compensation LED chip 2b
Area, can also be according to actual needs and be arranged other sizes.
Wherein, in the specific implementation, the setting quantity for the compensation LED chip for including in each compensation light modulation area, can be with
Depending on specific actual conditions.
For example, the compensation light modulation area that label as shown in Figure 4 and Figure 5 is, compensation, which dims in area 3a6, only to include
It is multiple to compensate in LED chip 2b (region of sparse stain filling), i.e. only include 8 compensation LED chip 2b in 3a6, does not wrap
Include normal LED chip 2a.
The partial enlargement diagram of 3a6 shown in Figure 5, in this way, can only be set for this kind compensation light modulation area (such as 3a6)
It sets a cathode signal line A22 (providing cathode signal for LED chip) and an anode signal line K22 (provides sun for LED chip
Pole signal), and for each compensation light modulation area, each compensation LED chip internal to it provides identical driving current, such as
8 compensation LED chip 2b in 3a6 are both connected between A22 and K22, with guarantee compensate light modulation area in each LED chip shine
Brightness is consistent at the same time it can also reduce wiring, to avoid short circuit caused by wiring excessively and interfere with each other.
In another example the compensation light modulation area that label as shown in Figure 6 to 8 is, it can both include mending in area that compensation, which dims,
LED chip 2b is repaid, can also include normal LED chip 2a, and compensate the setting quantity of LED chip 2b and normal LED chip 2a
It can be depending on the angle of on-right angle corner 4.
At this point, dim area for each described compensation, in order to guarantee to compensate the light emission luminance of LED chip equal to it is described just
The light emission luminance of normal LED chip needs to compensate light modulation area to each and provides two groups of signal wires, that is to say, that is directed to each
Compensation light modulation area compensates LED chip 2b and normal LED chip 2a and needs to be electrically connected from different cathode signal lines, similarly, mends
LED chip 2b and normal LED chip 2a is repaid to need to be electrically connected from different anode signal lines.
Area 3a7 is dimmed for example, with reference to compensation shown in Fig. 7, the region of oblique line filling indicates normal LED chip 2a, sparse
Stain filling region indicate compensation LED chip 2b, the compensation dim area in include 4 normal LED chip 2a and 3
Compensate LED chip 2b, wherein area is dimmed for the compensation, the cathode signal line provided with the different cathode signals of two groups of inputs (divides
Do not indicated with A12 and A22) the anode signal line (being indicated respectively with K12 and K22) of different with two groups of inputs anode signal, also
To say, compensation LED chip 2b be electrically connected respectively with different cathode signal lines from normal LED chip 2a, and respectively with difference
The electrical connection of anode signal line, i.e., each normal LED chip 2a be electrically connected with A12 and K12, and each compensation LED chip 2b is and A22
It is electrically connected with K22.
In this way, different driving currents can be provided to compensation LED chip 2b and normal LED chip 2a, i.e., for each
A compensation dims area, and the driving current inputted to the compensation LED chip 2b is greater than defeated to the normal LED chip 2a
The driving current entered causes to shine to avoid when providing identical driving current because the size for compensating LED chip 2b is smaller
Brightness is partially dark, so that the light emission luminance for each LED chip being located in compensation light modulation area is consistent.
Certainly, for normal light modulation area described in each, due to only including normal LED chip 2a inside it, and area is big
It is small all the same, so when providing identical driving current to each LED chip, the light emission luminance of each normal LED chip 2a
It can be all the same.Therefore, for normal light modulation area described in each, to the driving current of each normal LED chip 2a input
It is all the same.
Optionally, when in compensation light modulation area including multiple normal LED chip 2a and at least one compensation LED chip 2b,
The quantity of normal LED chip 2a therein generally can be set to even number (3a6 and Fig. 6 as shown in Figures 4 and 5 to figure
3a7 shown in 8), it can so be conducive to be routed.Also, for (including compensation light modulation area and normally of each light modulation area
Dim area), at least two normal LED chip 2a form a normal LED chip group after being connected in series, each described normal
It is connected in parallel between LED chip group.
It is shown in Figure 7, it is connected to labeled as 4 normal LED chip 2a between A12 and K12, is two normal
LED chip 2a is first composed in series a normal LED chip group 5, that is, constitutes 2 normal LED chip groups 5, then 2 it is normal
LED chip group 5 is connected in parallel between A12 and K12.
It is shown in Figure 8, be connected to labeled as 4 normal LED chip 2a between A12 and K12 be connected in series in A12 and
Between K12.
The normal light modulation area that middle label shown in Figure 4 is, including 9 normal LED chip 2a, wherein three normal
LED chip 2a be connected in series composition one normal LED chip group 6, then three normal LED chip groups 6 be connected in parallel in A11 with
Between K11.A11 indicates that cathode signal line, K11 indicate anode signal line, is only to be in Fig. 4 with the normal light modulation area labeled as 3b
Example, has marked the connection relationship between each normal LED chip 2a and cathode signal line and anode signal line, remaining normally dims area
Including each normal LED chip 2a and cathode signal line and anode signal line between connection relationship can refer to 3b, repeat place
It repeats no more.
Specifically, in embodiments of the present invention, for compensation light modulation area described in each: each compensation LED chip string
Connection connection；Alternatively, compensation LED chip described in even number forms a compensation LED chip group, each compensation after being connected in series
It is connected in parallel between LED chip group.
Compensation light modulation area 3a7 shown in referring to figs. 7 and 8, including three compensation LED chip 2b, this three compensation
LED chip is connected in series in labeled as between A22 and K22.Compensation shown in Figure 5 dims area 3a6, wherein only including compensation
LED chip 2b is connected in series to form compensation LED chip group 7 two-by-two, and then multiple compensation LED chip groups 7 are connected in parallel in A21
Between K21.Wherein, A21 indicates that cathode signal line, K21 indicate anode signal line.
Illustrate a bit, is merely illustrated in Fig. 5 and form a compensation LED chip group after being connected in series two-by-two
Situation, it is, of course, also possible to be four be connected in series after formed a compensation LED chip group or six series connections after formed
One compensation LED chip group, therefore, can according to the actual situation depending on, do not limit herein.
It may also be noted that for the cathode signal line and anode that are referred in Fig. 3, Fig. 4, Fig. 5 and Fig. 7 and Fig. 8
Signal wire, simply to illustrate that connection relationship between various LED chips and cathode signal line and anode signal line in figure, not
Limit the specific wire laying mode of cathode signal line and anode signal line in LED substrate.In actual manufacturing process, Ke Yigen
Cathode signal line and anode signal line are set according to specific actual conditions, do not limited herein.
It therefore, can be to on-right angle by compensating LED chip in the setting close to 4 position of on-right angle corner for mode 2
4 position of corner carries out luminance compensation, to avoid the appearance of crenellated phenomena, improves display effect；Also, in this kind of set-up mode by
It is smaller in the size of compensation LED chip, and the size for compensating LED chip can be set according to the actual situation, therefore this kind is set
Mode is set with stronger flexibility, is suitable for LED substrate of various shapes, to substantially increase the applicable model of backlight module
It encloses.
In the specific implementation, in embodiments of the present invention, either aforesaid way 1 or mode 2, in LED substrate 1
Each LED chip (including normal LED chip and compensation LED chip), the spacing between them can be set in 0.5 millimeter of -4 milli
Rice between, avoid between two adjacent LEDs chip while interfering with each other, can by LED chip be LCD display
Plate provides preferable backlight, improves the display effect of liquid crystal display panel.
Optionally, in embodiments of the present invention, between each LED chip (including normal LED chip and compensation LED chip)
Spacing can be set between 0.8 millimeter -2 millimeters, so as to provide more excellent backlight for liquid crystal display panel, into
The display effect of one step raising liquid crystal display panel.
Specifically, in embodiments of the present invention, LED chip can be blue-light LED chip, and the wavelength of chip can choose
Between 440 nanometers to 460 nanometers.Be arranged in a lesser range by the range that each LED chip shines, i.e., it will be each
The luminescent color of LED chip is set as essentially identical, so that the backlight module can be adapted for the liquid crystal of any Pixel Dimensions
Show panel, there is biggish application range, and there is stronger operating flexibility.
It is normal to dim area and compensation light modulation area in LED substrate 1 just it should be noted that in embodiments of the present invention
Projection of shape can be arbitrary shape, and can be arranged according to specific actual conditions.For example, normally light modulation area is described
Orthographic projection shape in LED substrate 1, which can be set, to be square, as shown in Figures 1 to 4, in another example, the normal area that dims is described
Orthographic projection shape in LED substrate 1 can be set to rectangle, as marked the normal light modulation area for being in Fig. 6；Correspondingly, institute
Stating orthographic projection shape of the compensation light modulation area in the LED substrate 1 can be set to arbitrary shape, rectangle as shown in Figure 1,
Fig. 7 and special shape shown in Fig. 8 trapezoidal and shown in fig. 5.
And it is further desired that, it is noted that backlight module can also include for realizing back other than including LED substrate 1
The structure of other function in optical mode group is such as successively set on light-emitting surface fluorescent film, diffusion sheet and the bright enhancement film of LED substrate 1
Deng the specific set-up mode and implementation of these structures can be found in the prior art, and details are not described herein.
Based on the same inventive concept, the embodiment of the invention also provides a kind of display devices, and as shown in Figure 9 and Figure 10 is aobvious
The structural schematic diagram of showing device, shown in Figure 9, display device may include: display panel 10 and such as embodiment of the present invention
The light-emitting surface of backlight module 20 is arranged in the above-mentioned backlight module 20 provided, display panel 10.
Wherein, display panel 10 can be liquid crystal display panel, and the backlight provided by backlight module 20 facilitates liquid
LCD panel 10 realizes display function.
Also, it is shown in Figure 9, liquid crystal display panel 10 may include array substrate 11, it is opposite with array substrate 11 and
The opposite substrate 12 set and the liquid crystal layer 13 between array substrate 11 and opposite substrate 12.It include more in liquid crystal layer 13
A liquid crystal molecule (such as elliptic region of vertical line filling), by applying certain voltage to liquid crystal molecule, so that liquid crystal molecule is sent out
Raw rotation, so that the backlight that backlight module 20 provides is passed through liquid crystal molecule 13 and is launched, to realize liquid crystal display
The display function of panel 10.
In the specific implementation, in embodiments of the present invention, which can be with are as follows: mobile phone (as shown in Figure 10), plate
Any products or components having a display function such as computer, television set, display, laptop, Digital Frame, navigator.
The implementation of the display device may refer to the embodiment of above-mentioned backlight module, and overlaps will not be repeated.
The embodiment of the invention provides a kind of backlight module and display devices, are divided into compensation light modulation area by that will dim zoning
Area is dimmed with normal, and is made in white light test phase, the light emission luminance and the normal light emission luminance for dimming area in compensation light modulation area
It is identical, it is ensured that it is uniform in the light emission luminance that test phase respectively dims area, it reduces bright between fringe region and intermediate region
Difference is spent, to be conducive to the display effect for improving liquid crystal display during actual display.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (13)
1. a kind of backlight module, which is characterized in that including LED substrate, the LED substrate includes multiple LED chips；The LED
Substrate includes multiple light modulation areas, and the light modulation area includes at least one described LED chip；
Multiple light modulation areas include: the compensation light modulation area of the fringe region setting close to the LED substrate, and far from described
The normal light modulation area of fringe region setting；
In white light test phase, the light emission luminance in compensation light modulation area, equal to the light emission luminance in the normal light modulation area, and institute
The quantity for stating the LED chip that compensation light modulation area includes, less than the number for the LED chip that the normal light modulation area includes
Amount.
2. backlight module as described in claim 1, which is characterized in that the LED substrate includes at least one on-right angle corner；
The LED chip includes compensation LED chip and normal LED chip；The compensation LED chip is set to described normal
LED chip is less than the face of the normal LED chip close to the side of the on-right angle corner, the area of the compensation LED chip
Product；
Compensation light modulation area includes at least one described compensation LED chip, and the normal light modulation area includes multiple described normal
LED chip.
3. backlight module as claimed in claim 2, which is characterized in that compensation light modulation area further includes that at least one is described just
Normal LED chip.
4. backlight module as claimed in claim 3, which is characterized in that compensation light modulation area includes multiple normal LED
Chip；
For light modulation area described in each, at least two normal LED chips form a normal LED chip after being connected in series
Group is connected in parallel between each normal LED chip group.
5. backlight module as claimed in claim 2, which is characterized in that dim area for each described compensation:
Each compensation LED chip is connected in series；Alternatively, compensation LED chip described in even number forms a benefit after being connected in series
LED chip group is repaid, is connected in parallel between each compensation LED chip group.
6. backlight module as claimed in claim 3, which is characterized in that dim area, the compensation for each described compensation
The light emission luminance of LED chip is equal to the light emission luminance of the normal LED chip；
For normal light modulation area described in each, the light emission luminance of each normal LED chip is all the same.
7. backlight module as claimed in claim 6, which is characterized in that area is dimmed for each described compensation, to the benefit
The driving current for repaying LED chip input, greater than the driving current inputted to the normal LED chip；
For normal light modulation area described in each, the driving current inputted to each normal LED chip is all the same.
8. backlight module as described in claim 1, which is characterized in that the area of each LED chip is equal.
9. backlight module as described in claim 1, which is characterized in that the spacing between each LED chip is 0.5 millimeter -4
Millimeter.
10. backlight module as described in claim 1, which is characterized in that the LED chip is blue-light LED chip.
11. backlight module as described in claim 1, which is characterized in that in the white light test phase, dimmed to the compensation
The driving current of LED chip input in area, the driving inputted greater than the LED chip into the normal light modulation area
Electric current.
12. backlight module as described in claim 1, which is characterized in that the normal light modulation area in the LED substrate just
Projection of shape is square；
Orthographic projection shape of the compensation light modulation area in the LED substrate is non-square.
13. a kind of display device characterized by comprising display panel and such as described in any item back of claim 1-12
Optical mode group.
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| CN201811276008.5A CN109164641B (en) | 2018-10-30 | 2018-10-30 | Backlight module and display device |
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| CN201811276008.5A CN109164641B (en) | 2018-10-30 | 2018-10-30 | Backlight module and display device |
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| CN113450730A (en) * | 2021-07-26 | 2021-09-28 | 北京显芯科技有限公司 | Backlight compensation method, device, system and storage medium |
| CN114596791A (en) * | 2022-02-23 | 2022-06-07 | 东莞市中麒光电技术有限公司 | Display module manufacturing method |
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