CN110488531A - A kind of backlight module and liquid crystal display device - Google Patents
A kind of backlight module and liquid crystal display device Download PDFInfo
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- CN110488531A CN110488531A CN201810464182.6A CN201810464182A CN110488531A CN 110488531 A CN110488531 A CN 110488531A CN 201810464182 A CN201810464182 A CN 201810464182A CN 110488531 A CN110488531 A CN 110488531A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 109
- 230000003287 optical effect Effects 0.000 claims abstract description 69
- 238000009792 diffusion process Methods 0.000 claims description 6
- 239000011796 hollow space material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 7
- 238000002156 mixing Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 7
- 238000000265 homogenisation Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000005142 aphototropism Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
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Classifications
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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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- 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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention provides a kind of backlight module and liquid crystal display device.The backlight module includes backboard, array light source, frame-type light guide plate and side entering optical source.Array light source is located on the bottom plate in backboard, and frame-type light guide plate and side entering optical source are located in the support plate in backboard.Projection of the array light source on frame-type light guide plate is located at the hollow part of frame-type light guide plate, and therefore, frame-type light guide plate is not only located at the top of array light source, but also is located at the surrounding of array light source.Again since the thickness of frame-type light guide plate is smaller, thus the edge of backlight module is relatively thin, can be realized edge ultrathin.In addition, backlight module provided by the invention is while realizing edge ultrathin, additionally it is possible to so that preferable image quality effect is presented in liquid crystal display device.
Description
Technical field
The present invention relates to technical field of liquid crystal display more particularly to a kind of backlight modules and liquid crystal display device.
Background technique
Liquid crystal display device is the device for showing picture, image and video etc., mainly includes liquid crystal display in structure
And backlight module.Backlight module can provide brightness that is sufficient and being evenly distributed to liquid crystal display, be the back in liquid crystal display device
Light source assembly.
Currently, liquid crystal display device is divided into directly-down liquid crystal display device and side entering type according to the different distributing position of light source
Liquid crystal display device, wherein attached drawing 1 shows the existing structural representation of directly-down liquid crystal display device a kind of in the related technology
Figure.By attached drawing 1 it is found that light source 01 is located at the lower section of liquid crystal display 02, and multiple light sources 01 arrange with a matrix type.Due to light source
01 is arranged in the lower section of liquid crystal display 02 with a matrix type, therefore, by the brightness and irradiation that accurately control each light source 01
Direction etc., can be realized the subregion backlight control of backlight module, and then provide most equably brightness and colour gamut to liquid crystal display 02.By
It can be realized subregion backlight control in directly-down liquid crystal display device, therefore, the picture of directly-down liquid crystal display device shows effect
Fruit is more excellent.In addition, due to there is no light guide plate and complicated diaphragm demand in directly-down liquid crystal display device, straight-down negative liquid
The preparation cost of crystal device is lower.
To make light source 01 reach most uniform lighting requirements, need that there are enough light mixings between light source 01 and liquid crystal display 02
With the light mixing chamber 03 of certain volume between distance, i.e. light source 01 and liquid crystal display 02.The presence of light mixing chamber 03 leads to straight-down negative liquid
The thickness of crystal device is thicker.Currently, demand degree of the consumer to liquid crystal display device ultrathin is higher and higher, therefore, it is
It meets the market requirement, directly-down liquid crystal display device needs to accomplish the super of visual ultrathin, especially backlight module edge
Thinning.But due to the limitation of light mixing chamber 03 between light source 01 and liquid crystal display 02, there is presently no realities for directly-down liquid crystal display device
Existing edge ultrathin.
Summary of the invention
The present invention provides a kind of backlight module and liquid crystal display device, to solve existing directly-down liquid crystal display device thickness
Thicker problem.
In a first aspect, the present invention provides a kind of backlight module, comprising: backboard, array light source and frame-type light guide plate；It is described
Backboard includes bottom plate, the side plate that the bottom plate surrounding is arranged in and the support plate being arranged on the side plate；On the bottom plate
The array light source is set, and the side plate is around the array light source；The frame-type light guide plate is set in the support plate；It is described
Projection of the array light source on the frame-type light guide plate is located at the hollow space of the frame-type light guide plate；The frame-type light guide plate is remote
Side from the array light source is equipped with side entering optical source, and the side entering optical source and the frame-type light guide plate are located at same level
On.
Second aspect, the present invention provide a kind of liquid crystal display device, the backlight module including liquid crystal display and first aspect, institute
State the top that liquid crystal display is located at frame-type light guide plate in the backlight module.
The technical solution that the embodiment of the present invention provides can include the following benefits:
The present invention provides a kind of backlight module and liquid crystal display device.The backlight module include backboard, array light source and
Frame-type light guide plate, wherein backboard includes bottom plate, the side plate that bottom plate surrounding is arranged in and the support plate being arranged on side plate.Bottom
Array light source is set on plate, and side plate is around array light source；Frame-type light guide plate is set in support plate.Frame-type light guide plate is far from array light
The side in source is equipped with side entering optical source, and side entering optical source and frame-type light guide plate are located in same level.Array light source is led in frame-type
Projection on tabula rasa is located at the hollow space of frame-type light guide plate, and therefore, frame-type light guide plate is not only located at the top of array light source, and
And it is also located at the surrounding of array light source.Since frame-type light guide plate and side entering optical source are located at the surrounding of array light source, and frame-type is guide-lighting
The thickness of plate is smaller, thus thickness of the backlight module in edge is smaller, can be realized edge ultrathin.Again due to array light
Source can be realized the subregion backlight control of backlight module, and therefore, backlight module provided by the invention can realize that edge is ultra-thin
While change, the subregion backlight control of backlight module is realized.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the existing structural schematic diagram of down straight aphototropism mode set a kind of in the related technology；
Fig. 2 is the first structural schematic diagram of backlight module provided in an embodiment of the present invention；
Fig. 3 is the top view of attached drawing 2 provided in an embodiment of the present invention；
Fig. 4 is the index path that light is propagated in liquid crystal display device provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram in mixed light area provided in an embodiment of the present invention；
Fig. 6 is second of structural schematic diagram of backlight module provided in an embodiment of the present invention；
Fig. 7 is the third structural schematic diagram of backlight module provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of liquid crystal display device provided in an embodiment of the present invention.
Specific embodiment
It is existing in the related technology, the light source in directly-down liquid crystal display device is located at the lower section of liquid crystal display, and multiple light sources
It arranges with a matrix type.The arrangement mode of light source matrix form enables to backlight module and accurately controlling each light source
Subregion backlight control is realized, in order to provide most equably brightness and colour gamut to liquid crystal display.Due to directly-down liquid crystal display device
It can be realized subregion backlight control, therefore, the picture display effect of directly-down liquid crystal display device is more excellent.To reach light source most
Uniform lighting requirements, need that there are enough light mixing distances between light source and liquid crystal display, i.e., have between light source and liquid crystal display
The light mixing chamber of certain volume.The presence of light mixing chamber causes the thickness of directly-down liquid crystal display device thicker.Currently, consumer is to liquid
The demand degree of crystal device ultrathin is higher and higher, and therefore, to meet the market requirement, directly-down liquid crystal display device needs
Ensure to accomplish while picture display effect visual ultrathin, the especially ultrathin at backlight module edge.But due to light
The limitation of light mixing chamber between source and liquid crystal display, there is presently no realize edge ultrathin for directly-down liquid crystal display device.
In view of the above-mentioned problems, this application provides a kind of backlight module and liquid crystal display devices.Backlight provided by the present application
The core concept of mould group are as follows: backlight module includes backboard, array light source and frame-type light guide plate, wherein backboard includes bottom plate, sets
Set the side plate in bottom plate surrounding and the support plate that is arranged on side plate.Array light source is set on bottom plate, and side plate is around array light
Source；Frame-type light guide plate is set in support plate.Frame-type light guide plate is equipped with side entering optical source, and side entering optical source far from the side of array light source
In support plate.Projection of the array light source on frame-type light guide plate is located at the hollow space of frame-type light guide plate, and therefore, frame-type is led
Tabula rasa is not only located at the top of array light source, but also is located at the surrounding of array light source.Due to frame-type light guide plate and side entering optical source
Positioned at the surrounding of array light source, and the thickness of frame-type light guide plate is smaller, thus the edge of backlight module is relatively thin, can be realized
Edge ultrathin.Meanwhile array light source can be realized the subregion backlight control of backlight module so that liquid crystal display device present compared with
Good image quality effect.Therefore, backlight module provided by the present application can be while realizing edge ultrathin, so that liquid crystal display
Preferable image quality effect is presented in device.
Below in a manner of specific embodiment combination attached drawing to backlight module provided by the present application and liquid crystal display device into
Row detailed description.
Attached drawing 2,3 is please referred to, attached drawing 2 shows the first structure for the backlight module that embodiment provided by the present application provides
Schematic diagram；Attached drawing 3 is the top view of attached drawing 2.By attached drawing 2,3 it is found that the backlight module 01 that embodiment provided by the present application provides
Including array light source 1, frame-type light guide plate 2, side entering optical source 3 and backboard 6.Array light source 1 is set on the bottom plate 61 of backboard 6, and
The side plate 62 of backboard 6 surrounds array light source 1.The support plate 63 of backboard 6 is equipped with frame-type light guide plate 2 and side entering optical source 3, and side enters
Light source 3 is located at side of the frame-type light guide plate 2 far from array light source 1, and side entering optical source 3 and frame-type light guide plate 2 are located at same level
On.
Specifically, array light source 1 is to provide the component of backlight to liquid crystal display 02, so that liquid crystal display 02 is in array light source 1
Irradiation is lower to show image.In embodiment provided by the present application, multiple array light sources 1 are arranged according to the form of matrix, such as
Shown in attached drawing 3.Arrangement mode and usage quantity of multiple array light sources 1 etc. are required according to the size and display of liquid crystal display 02
Deng determination.
LED (English name: Light Emitting Diode；Chinese: light emitting diode) it is semiconductor diode
One of, luminous energy can be converted electrical energy into.LED have that efficiency is high, stability is strong, the response time is short, color is various and
The advantages that without harmful mercury metal, thus, in embodiment provided by the present application, array light source 1 is preferably using LED as lamp
Pipe.
Frame-type light guide plate 2 is the light guide plate of frame-type structure, high, not extinction etc. the characteristic with reflectivity.In the application
In the embodiment of offer, frame-type light guide plate 2 enables to the light uniformization injected in frame-type light guide plate 2, and the light after homogenization
It injects in liquid crystal display 02.The light that side entering optical source 3 issues can be injected inside frame-type light guide plate 2, by the uniform of frame-type light guide plate 2
Light emission after change enters in liquid crystal display 02.More preferably, side entering optical source 3 is it is also preferred that using LED as fluorescent tube.
Backboard 6 be backlight module support member, be used to support array light source 1, frame-type light guide plate 2, side entering optical source 3 and
The components such as liquid crystal display 02.Backboard 6 includes bottom plate 61, the side plate 62 that 61 surrounding of bottom plate is arranged in and the support plate on side plate 62
63, i.e. backboard 6 is that bottom surface is depressed in side wall and open-topped structure.In general, backboard 6 is prepared using metal material, to provide
Enough support forces.
In existing directly-down liquid crystal display device, during light source 01 provides backlight to liquid crystal display 02, to prevent
The backlight of 02 surrounding of liquid crystal display is partially dark, the sidewall slope setting of existing backboard, and tilt angle is larger, such as the angle α in attached drawing 1.
At this point, existing directly-down liquid crystal display device is the partially thick structure in the slightly thin centre in edge in terms of external structure.Again due to light source with
The limitation of light mixing chamber between liquid crystal display, the integral thickness of directly-down liquid crystal display device are thicker.
In the backlight module 01 that embodiment provided by the present application provides, pass through setting for frame-type light guide plate 2 and side entering optical source 3
Set the edge ultrathin for enabling to directly-down liquid crystal display device.Specifically, array light source 1, and side plate are set on bottom plate 61
62 around array light source 1, in order to which array light source 1 provides backlight to liquid crystal display 02.Since array light source 1 is mentioned to liquid crystal display 02
For needing certain mixed light space when backlight, therefore, there are light mixing chambers 4 between array light source 1 and liquid crystal display 02.Side entering optical source 3
After the light emission of sending enters frame-type light guide plate 2, the light after the homogenization of frame-type light guide plate 2 can be emitted directly toward in liquid crystal display 02.
If the distance between frame-type light guide plate 2 and liquid crystal display 02 are farther out, the light after frame-type light guide plate 2 homogenizes is injecting liquid crystal display 02
During may because the reason of light path etc. weaken light exposure intensity, reduce frame-type light guide plate 2 homogenize after light benefit
With rate.Therefore, be improve frame-type light guide plate 2 homogenize after light utilization rate, between frame-type light guide plate 2 and liquid crystal display 02 away from
It is smaller from setting.As a result, in embodiment provided by the present application, when the position of array light source 1 and frame-type light guide plate 2 is set, frame
Type light guide plate 2 is located at the top of array light source 1, and the distance between frame-type light guide plate 2 and liquid crystal display 02 are smaller.
Since frame-type light guide plate 2 is located on bottom plate 61, frame-type light guide plate 2 is located in support plate 63, and frame-type light guide plate 2 is located at
The top of array light source 1, and there are light mixing chambers 4 between array light source 1 and liquid crystal display 02, therefore, 62 top of bottom plate 61 and side plate
The distance between farther out.The light issued due to array light source 1 in horn-like injection liquid crystal display 02, to make array light source 1
The light of sending is all injected in liquid crystal display 02, and side plate 62 is inclined side plate.
Support plate 63 is the device for supporting fixed frame-type light guide plate 2 and side entering optical source 3.Two are provided in the embodiment of the present application
The structure of kind support plate 63, as shown in attached drawing 2,6.
For the first structure of support plate 63, attached drawing 2 is please referred to.As shown in Fig. 2, support plate 63 is located at side plate 62
Top, and support plate 63 is parallel to bottom plate 61, and frame-type light guide plate 2 and side entering optical source 3 is arranged in support plate 63.Implement in the application
In example, support plate 63 is prepared by the plate of thinner thickness.Since the thickness of frame-type light guide plate 2 and support plate 63 is smaller, side
Enter the small volume of light source 3, and support plate 63 is horizontally disposed, thus thickness of the backlight module 01 in edge is smaller, and is water
It is flat-shaped.The edge more ultrathin of backlight module 01 is enabled to by the setting of support plate 63 as a result,.
For second of structure of support plate 63, attached drawing 6,7 is please referred to.As shown in Figures 6, 7, side plate 62 is close to array light
Support plate 63 is set on the side in source 1.In embodiment provided by the present application, support plate 63 can be L-type, T-type or other energy
Enough support the shape of frame-type light guide plate 2 and side entering optical source 3.When support plate 63 is L-type support plate, the vertical portion of L-type support plate
It is arranged on side plate 62, frame-type light guide plate 2 and side entering optical source 3 is set on horizontal part.When support plate 63 is T-shaped support plate, T-type
The vertical portion of support plate is arranged on side plate 62, and frame-type light guide plate 2 and side entering optical source 3 are arranged on horizontal part.
Certainly, the structure of support plate 63 is not limited to above two concrete mode, can also be fixed using other structures
Frame-type light guide plate 2 and side entering optical source 3.
It further, is the processing convenient for backboard 6, in the embodiment of the present application, backboard 6 is integrated machine-shaping structure.
Due to being arranged as being independent of each other between rectangular each array light source 1, and array light source 1 is presented when providing backlight
For shining for horn-like formula, therefore distribution, light emission luminance and quantity etc. by adjusting different array light sources 1 can be adjusted not
It is irradiated to the brightness on liquid crystal display 02 with array light source 1, realizes the subregion backlight control of backlight module 01.
When being equipped with frame-type light guide plate 2 above array light source 1, to prevent frame-type light guide plate 2 from influencing point of backlight module 01
Area's backlight control, array light source 1 are located at 2 hollow part of frame-type light guide plate, and frame-type light guide plate 2 as shown in Fig. 3 is located at array
The edge of light source 1.Since frame-type light guide plate 2 is located at the edge of array light source 1, and the thickness of frame-type light guide plate 2 is smaller, because
This, thickness of the backlight module 01 in edge is smaller, can be realized 01 edge ultrathin of backlight module.
Side entering optical source 3 is to frame-type light guide plate 2 to provide the component of light source, when side entering optical source 3 be located at frame-type light guide plate 2 towards
When the side of array light source 1, i.e. the inside that is located at frame-type light guide plate 2 of side entering optical source 3, at this point, the light that side entering optical source 3 issues is in frame
The direction of propagation in type light guide plate 2 is to be propagated by the lateral direction of frame-type light guide plate 2 lateral in frame-type light guide plate 2.As a result, from
The light to spread out of on the outside of frame-type light guide plate 2 can not be irradiated on liquid crystal display 02, cause light loss.It therefore, is raising side entering optical source 3
The utilization rate of the light of sending, side entering optical source 3 are arranged in side of the frame-type light guide plate 2 far from array light source 1, and side entering optical source 3 with
Frame-type light guide plate 2 is located in same level.
Attached drawing 4 is please referred to, attached drawing 4 shows light in the liquid crystal display device that embodiment provided by the present application provides and propagates
Index path.By attached drawing 4 it is found that in the backlight module 01 that embodiment provided by the present application provides, the light of the sending of array light source 1
Direct irradiation is on liquid crystal display 02.After the light emission that side entering optical source 3 issues enters frame-type light guide plate 2, by the uniform of frame-type light guide plate 2
After change, part light is injected in liquid crystal display 02 from the upper surface of frame-type light guide plate 2, and rest part light is from frame-type light guide plate 2 close to battle array
The side of column light source 1 is injected in the light mixing chamber 4 between array light source 1 and frame-type light guide plate 2, and then the part light injects liquid indirectly
In crystalline substance screen 02.
If the light that the array light source 1 for being located at outer edge is issued is not irradiated on frame-type light guide plate 2, in attached drawing 2
Array light source 1a, then in frame-type light guide plate 2 close to the side of array light source 1, the brightness of liquid crystal display 02 is significantly lower than other positions
The brightness at place or no brightness, the image quality that liquid crystal display 02 is presented in this are lower.To lean on liquid crystal display 02 in frame-type light guide plate 2
The side of nearly array light source 1 has brightness, and the light issued positioned at the array light source 1 of outer edge is at least radiated at frame-type leaded light
Plate 2 is on the side of array light source 1.The light that array light source 1a as shown in Fig. 2 is issued at least is radiated at frame-type and leads
Tabula rasa 2 is on the side of array light source 1.
The light direct irradiation that array light source 1 issues forms the first irradiation area on liquid crystal display 02.Side entering optical source 3 issues
Light injected in liquid crystal display 02 after the homogenization of frame-type light guide plate 2, formed the second irradiation area.To make liquid crystal display 02
With brightness, the first irradiation area and the second irradiation area should be contacted or be overlapped.When the first irradiation area and the second irradiation area
When should contact or be overlapped, liquid crystal display 02 is easy to lead to apparent brightness point occur there are luminance difference in its contact position or intersection
Cloth is uneven.
To solve the problems, such as luminance difference existing for contact position or intersection, frame-type light guide plate 2 is close to the side of array light source 1
Inclined side 5, and from side entering optical source 3 to 1 direction of array light source, the thickness of the frame-type light guide plate 2 at inclined side 5 is gradually
Reduce, as shown in Fig. 5.Since frame-type light guide plate 2 is inclined side 5 close to the side of array light source 1, it is located at outside
The light that array light source 1 at edge issues can be irradiated on inclined side 5.What array light source 1b as shown in Fig. 5 was issued
Light can be irradiated on inclined side 5.When be located at outer edge array light source 1 issue illumination be mapped on inclined side 5, and
When side entering optical source 3 is injected in frame-type light guide plate 2, light mixing of two kinds of light in frame-type light guide plate 2 forms mixed light.And due to
From side entering optical source 3 to 1 direction of array light source, the thickness of the frame-type light guide plate 2 at inclined side 5 is gradually reduced, therefore, from
Side entering optical source 3 is to the horizontal direction of array light source 1, and the brightness of mixed light is gradually from the brightness that side entering optical source 3 is dominated to array
The brightness that light source 1 is dominated is excessive, to realize that side entering optical source 3 and array light source 1 issue the adjusting of the brightness of light, and then reaches bright
Spend the effect of gradually transition.At this point, liquid crystal display 02 is visually not in apparent luminance difference.
In practical applications, since the performance of array light source 1 and LED used by side entering optical source 3 is different, and array light source
Differences such as 1 distribution, quantity, thus size required for mixed light is different in frame-type light guide plate 2, i.e. inclined side 5
Tilt angle is different, it is, projection width H of the inclined side 5 on 2 upper surface of frame-type light guide plate is different.To adapt to liquid crystal
Shield the setting of 02 different daylighting demand and array light source 1 and side entering optical source 3, the tilt angle of inclined side 5 is according to liquid crystal
The brightness uniformity of screen 02, which is adjusted, to be determined, i.e. projection width H of the inclined side 5 on 2 upper surface of frame-type light guide plate is according to liquid crystal
The brightness uniformity of screen 02, which is adjusted, to be determined.
In the embodiment of the present application, projection width H of the inclined side 5 on 2 upper surface of frame-type light guide plate is greater than or equal to
The half of spacing between two neighboring array light source 1.At this point, mixed light can be realized the first irradiation area and the second irradiation area
Between homogenization it is excessive so that the brightness uniformity of liquid crystal display 02.
Since frame-type light guide plate 2 is frame-type structure, there are four frames, i.e. side in attached drawing 3 for frame-type light guide plate 2
Frame 1-4.For the brightness uniformity for making liquid crystal display 02, of same size, and the inclined side 5 of two opposite frames of frame-type light guide plate 2
Tilt angle it is also identical.Further, the width of frame is set according to actual needs in frame-type light guide plate 2, practical raw to meet
It produces and requires.
Frame-type light guide plate 2 is equipped with side entering optical source 3 far from the side of array light source 1.In general, the quantity of side entering optical source 3 can be with
To be multiple, to provide sufficient brightness to liquid crystal display 02.If but the quantity of side entering optical source 3 is more, is not easy to setting side and enters light
Source 3, and result in waste of resources.For this purpose, in embodiment provided by the present application, every side of the frame-type light guide plate 2 far from array light source 1
It is respectively equipped with a side entering optical source 3, i.e. the side of the separate array light source 1 of frame 1-4 is respectively equipped with a side entering optical source 3.For
Make there is light emission to enter in each frame, four set side entering optical sources 3 inject the different frame of frame-type light guide plate 2 respectively
In.
Further, when side entering optical source 3 is located at the middle position of frame, then the brightness at the end position of the frame
It is lower, so that the brightness of 02 edge of liquid crystal display is lower, at this point, the Luminance Distribution of liquid crystal display 02 is uneven.For this purpose, this Shen
In the embodiment that please be provided, side entering optical source 3 is located at the end of the frame of frame-type light guide plate 2, and on each side of frame-type light guide plate 2
Only has a side entering optical source 3 at angle.If an edge of frame-type light guide plate 2 is set, there are two side entering optical source 3, frame-type light guide plates
The brightness of 2 edge is higher, this again such that liquid crystal display 02 brightness irregularities.
As shown in Fig. 3, side entering optical source 3a is located at 1 right end of frame, and is located remotely from the lateral position of array light source 1.Side enters
The light emission that light source 3a is issued enters in frame 4.Likewise, side entering optical source 3b is located at 2 upper end of frame, and it is located remotely from array light source 1
Lateral position.The light emission that side entering optical source 3b is issued enters in frame 1.For the location expression and irradiation position of side entering optical source 3c, 3d
Description, details are not described herein again.
Certainly, side entering optical source 3a may be located on 1 left end of frame, for avoid frame-type light guide plate 2 each edge only
There is a side entering optical source 3, then the position of side entering optical source 3b, 3c and 3d should be accordingly arranged with the position of side entering optical source 3a.
Further, the top of frame-type light guide plate 2 is equipped with diffusion sheet 7.After the top setting diffusion sheet 7 of frame-type light guide plate 2, battle array
Light after the light and frame-type light guide plate 2 that column light source 1 issues homogenize is injected in diffusion sheet 7.Diffusion sheet 7 passes through its inside
Scattering particles so that the brightness for the light injected is more uniform, and then provides more uniform brightness to liquid crystal display 02, realizes liquid crystal
The brightness uniformity of screen 02.
The embodiment of the present application also provides a kind of liquid crystal display device, which includes liquid crystal display 02 and above-mentioned reality
The backlight module 01 in example is applied, wherein liquid crystal display 02 is located at the top of frame-type light guide plate 2 in backlight module 01, specifically please refers to attached
Fig. 8.The light direct irradiation that array light source 1 in backlight module 01 issues is on liquid crystal display 02.Meanwhile at array edges
The light that array light source 1 issues also is injected in the frame-type light guide plate 2 in backlight module 01.Side entering optical source 3 in backlight module 01 is sent out
Light part out is injected in liquid crystal display 02 after the homogenization of frame-type light guide plate 2, and another part is injected frame-type with array light source 1 and led
Light mixing in tabula rasa 2, forms mixed light.Mixed light is injected in liquid crystal display 02 after the homogenization of frame-type light guide plate 2, in turn
Realize the brightness uniformity of liquid crystal display 02.
Since frame-type light guide plate 2 is located at the surrounding of array light source 1, and the thickness of type light guide plate 2 is smaller, side entering optical source 3
Small volume, thus thickness of the liquid crystal display device in edge is smaller, the edge of liquid crystal display device is rendered as ultrathin.
Those skilled in the art will readily occur to of the invention its after considering specification and the disclosure invented here of practice
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the relational terms of such as " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.The present invention is not limited to the precise structure already described above and shown in the accompanying drawings,
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is only limited by the attached claims
System.
Claims (10)
1. a kind of backlight module characterized by comprising backboard, array light source and frame-type light guide plate；
The backboard includes bottom plate, the side plate that the bottom plate surrounding is arranged in and the support plate being arranged on the side plate；
The array light source is set on the bottom plate, and the side plate is around the array light source；In the support plate described in setting
Frame-type light guide plate；
Projection of the array light source on the frame-type light guide plate is located at the hollow space of the frame-type light guide plate；
The frame-type light guide plate is equipped with side entering optical source far from the side of the array light source, and the side entering optical source is led with the frame-type
Tabula rasa is located in same level.
2. backlight module according to claim 1, which is characterized in that the frame-type light guide plate is close to the array light source
Side is inclined side；From the side entering optical source to the array light source direction, the frame-type light guide plate is in the inclined side
The thickness at place is gradually reduced.
3. backlight module according to claim 2, which is characterized in that inclined side table on the frame-type light guide plate
Projection width on face is greater than or equal to the half of the two neighboring array light source spacing.
4. backlight module according to claim 2, which is characterized in that incline described in opposite two in the frame-type light guide plate
The tilt angle of prism is identical.
5. backlight module according to claim 1, which is characterized in that each frame is far from described in the frame-type light guide plate
The side of array light source is respectively equipped with the side entering optical source, and the light that the different side entering optical sources issues injects difference respectively
The frame in.
6. backlight module according to claim 5, which is characterized in that the side entering optical source is located at the end of the frame,
Only has the side entering optical source in each edge of the frame-type light guide plate.
7. backlight module according to claim 1-6, which is characterized in that the support plate is located at the side plate
Top, the support plate are parallel to the bottom plate.
8. backlight module according to claim 1-6, which is characterized in that the support plate includes T-shaped support plate
Or L-type support plate, the vertical portion of the T-shaped support plate or the L-type support plate are located in the support plate, horizontal part is equipped with
The frame-type light guide plate and the side entering optical source.
9. backlight module according to claim 1-6, which is characterized in that the top of the frame-type light guide plate is equipped with
Diffusion sheet, the diffusion sheet at least cover the frame-type light guide plate.
10. a kind of liquid crystal display device, which is characterized in that including liquid crystal display and the described in any item backlight moulds of claim 1-9
Group, the liquid crystal display are located at the top of frame-type light guide plate in the backlight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810464182.6A CN110488531A (en) | 2018-05-15 | 2018-05-15 | A kind of backlight module and liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810464182.6A CN110488531A (en) | 2018-05-15 | 2018-05-15 | A kind of backlight module and liquid crystal display device |
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| CN110488531A true CN110488531A (en) | 2019-11-22 |
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| CN201810464182.6A Pending CN110488531A (en) | 2018-05-15 | 2018-05-15 | A kind of backlight module and liquid crystal display device |
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Address after: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Applicant after: Hisense Visual Technology Co., Ltd. Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Applicant before: QINGDAO HISENSE ELECTRONICS Co.,Ltd. |
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