CN108646465A - Display device - Google Patents
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- CN108646465A CN108646465A CN201810443669.6A CN201810443669A CN108646465A CN 108646465 A CN108646465 A CN 108646465A CN 201810443669 A CN201810443669 A CN 201810443669A CN 108646465 A CN108646465 A CN 108646465A
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- Prior art keywords
- light
- degree
- guide plate
- display device
- prismatic lens
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- 238000009792 diffusion process Methods 0.000 claims description 31
- 239000002245 particle Substances 0.000 claims description 2
- 238000002310 reflectometry Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 9
- 208000004350 Strabismus Diseases 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004425 Makrolon Substances 0.000 description 1
- -1 acryl Chemical group 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012994 photoredox catalyst Substances 0.000 description 1
Classifications
-
- 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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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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)
Abstract
A display device comprises a display module and a backlight module. The backlight module is stacked on the display module. The backlight module comprises a light guide plate, a plurality of light sources and a first prism sheet. The light guide plate is provided with a light incident surface, a bottom surface and a light emergent surface opposite to the bottom surface. The first direction is perpendicular to the light-emitting surface. The light source is arranged on the light incident surface. The light source and the light guide plate have the shortest distance in the second direction. The light sources are arranged along a third direction. The first prism sheet is arranged on the light-emitting surface. The first prism sheet has a plurality of first protrusion structures. The refractive index of the first protrusion structure is greater than or equal to 1.6. A light provided by the light source passes through the light guide plate.
Description
Technical field
The present invention relates to a kind of display devices, and more particularly to a kind of display device with backlight module.
Background technology
With the development of science and technology electronic product role in the life of the mankind is more and more important, mobile phone, computer,
The function of the products such as TV, smartwatch ... is also more and more.However, being required for when using the various functions of electronic product
The energy is consumed, therefore, the energy loss that how reduce electronic product becomes current all circles and wants to solve the problems, such as.
In the electronic product for having display device, in order to show the picture with enough brightness, display device
Backlight module generally requires to consume many energy.In some portable electronic products (such as mobile phone, tablet computer), display dress
If the power consumption set is too high, then electronic product is susceptible to the hypodynamic problem of continuation of the journey.Therefore, how display device is reduced
Power consumption become for current urgent problem.
Invention content
The present invention provides a kind of display device, can save the energy consumed required for backlight module.
In at least embodiment of the present invention, display device includes display module and backlight module.Backlight module along
First direction is stacked at display module.Backlight module includes light guide plate, a plurality of light sources and the first prismatic lens.Light guide plate has
The light-emitting surface of incidence surface, bottom surface and opposing bottom surface.First direction is perpendicular to light-emitting surface.A plurality of light sources are set to incidence surface.
There is most short spacing in light source in second direction and light guide plate.Light source is arranged along third direction.First direction, second direction with
And third direction is mutually orthogonal.First prismatic lens are set to light-emitting surface.First prismatic lens have a plurality of first bulge-structures.The
The refractive index of one bulge-structure is greater than or equal to 1.6.The light that light source is provided passes through light guide plate.With second direction be 90 degree and
With first direction for 0 degree, in light in the light distribution in the plane that first direction and second direction are constituted, with 13 degree~70 degree
Leave light-emitting surface some light occupy the light for leaving light-emitting surface gross energy 35% or more.
Display device includes display module and backlight module.Backlight module is stacked at display module in first direction.The back of the body
Optical module includes light guide plate, a plurality of light sources and the first prismatic lens.Light guide plate has incidence surface, bottom surface and opposing bottom surface
Light-emitting surface.First direction is perpendicular to light-emitting surface.A plurality of light sources are set to incidence surface.Have in light source in second direction and light guide plate
There is most short spacing.Light source is arranged along third direction.First direction, second direction and third direction are mutually orthogonal.First rib
Eyeglass is set to light-emitting surface.First prismatic lens have a plurality of first bulge-structures.The refractive index of first bulge-structure be more than or
Equal to 1.6.The light that light source is provided passes through light guide plate.Be 90 degree with second direction and be 0 degree with first direction, light in
In the light distribution in plane that first direction and second direction are constituted, leave the light of light-emitting surface maximum brightness be located at 80 degree~
90 degree.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and it is detailed to coordinate attached drawing to make
Carefully it is described as follows.
Description of the drawings
Fig. 1 is the strabismus schematic diagram according to a kind of display device of one embodiment of the invention.
Fig. 2 is the light distribution figure according to a kind of light guide plate of one embodiment of the invention.
Fig. 3 is the light distribution figure according to a kind of light guide plate of one embodiment of the invention.
Fig. 4 is the light distribution figure according to a kind of light guide plate of one embodiment of the invention.
Fig. 5 is the strabismus schematic diagram according to a kind of display device of one embodiment of the invention.
Fig. 6 is the light distribution figure according to a kind of diffusion sheet of one embodiment of the invention.
Fig. 7 is the light distribution figure according to a kind of light guide plate of one embodiment of the invention.
Fig. 8 is the light distribution figure according to a kind of diffusion sheet of one embodiment of the invention.
Fig. 9 is the light distribution figure according to a kind of diffusion sheet of one embodiment of the invention.
Reference sign：
10、20：Display device
100：Display module
200：Backlight module
210：Light guide plate
220：A plurality of light sources
230：First prismatic lens
240：Second prismatic lens
250：Diffusion sheet
A1、A2：Direction
B：Bottom surface
D1：First direction
D2：Second direction
D3：Third direction
E：Light-emitting surface
I：Incidence surface
P：Circuit board
P1：First bulge-structure
P2：Second bulge-structure
R：Reflector plate
X、Y：Plane
α、γ：Vertical angle
β、δ：Horizontal angle
Specific implementation mode
Fig. 1 is the strabismus schematic diagram according to a kind of display device of one embodiment of the invention.
Referring to FIG. 1, in this example it is shown that device 10 include display module 100 and backlight module 200, wherein
Backlight module 200 is stacked at display module 100 in first direction.Backlight module 200 includes light guide plate 210, a plurality of light sources 220
And first prismatic lens 230.
In this present embodiment, light guide plate 210 has the light-emitting surface E of incidence surface I, bottom surface B and opposing bottom surface B.Light guide plate
210, the first prismatic lens 230 and display module 100 along a first direction D1 and be stacked and be arranged, in other words, first direction D1 is real
Quality is perpendicular to light-emitting surface E.In some embodiments, there are a plurality of micro- knots on the bottom surface B and/or light-emitting surface E of light guide plate 210
Structure (is not drawn), and micro-structure is for example distributed on bottom surface B and/or light-emitting surface E.In some embodiments, the material of light guide plate 210
For example, makrolon (Polycarbonate, PC), polymethyl methacrylate (Polymethyl methacrylate,
PMMA), the combination of other high molecular materials or above-mentioned material, but invention is not limited thereto.
In this present embodiment, light source 220 is for example disposed on circuit board P, and light source 220 is set to light guide plate 210
Incidence surface I, that is, 220 position of light source corresponds to incidence surface I.In Fig. 1, light source 220 is set to the side surface of light guide plate 210
(such as incidence surface I) so that the light that light source 220 provides is to enter light guide plate by the side surface of light guide plate, forms the side entering type back of the body
Optical module.There is most short spacing in light source 220 on second direction D2 and light guide plate 210, and multiple light sources 220 are along third direction
D3 is arranged.Specifically, second direction D2 is substantially perpendicular to incidence surface I, third direction D3 is then substantially parallel to incidence surface I, and
Essence is orthogonal mutually by first direction D1, second direction D2 and third direction D3.Light source 220 can for example send out white light, blue light
Or the light of other colors is in the present embodiment by taking the light source 220 for sending out white light as an example, but invention is not limited thereto.
In this present embodiment, the first prismatic lens 230 are set to light-emitting surface E so that the first prismatic lens 230 are located at display module
Between 100 and light guide plate 210.First prismatic lens 230 have a plurality of first bulge-structure P1.First bulge-structure P1 is, for example,
Triangle cylindricality, and the first bulge-structure P1 is arranged along direction A1.The refractive index of first bulge-structure P1 is greater than or equal to 1.6.
The material of first bulge-structure P1 is, for example, high crosslinking acryl resin (Crosslinked acrylic resin), other height
The combination of molecular material or above-mentioned material, but invention is not limited thereto.
In some embodiments, backlight module 200 further includes the second prismatic lens 240 and reflector plate R.Second prismatic lens
240 are set between the first prismatic lens 230 and light guide plate 210, and the second prismatic lens 240 have a plurality of second bulge-structures
P2.Second bulge-structure P2 is, for example, triangle cylindricality, and the second bulge-structure P2 is arranged along direction A2, and direction A2 is for example vertical
In direction A1.In Fig. 1, the bulge-structure P1 of the first prismatic lens 230 is to be arranged along direction A1, and direction A1 is substantially parallel to
Second direction D2.Meanwhile second the bulge-structure P2 of prismatic lens 240 then arranged along direction A2, and direction A2 is substantially parallel to
Third direction D3.In another variation, the bulge-structure P1 of the first prismatic lens 230 can then be arranged along direction A2, and second
The bulge-structure P2 of prismatic lens 240 is to be arranged along direction A1.In another variation, direction A1 and direction A2 are substantially vertical,
That is, first prismatic lens bulge-structure P1 trend with the trend of the bulge-structure P2 of the second prismatic lens be essence it is orthogonal, but just
Angle is accompanied between A1 and second direction D2.In other words, it is not parallel between direction A1 and second direction D2, compared to figure
For 1, direction A1 is to rotate an angle in clockwise and counterclockwise directions on the basis of second direction D2, helps reduce optics
Striped.The refractive index of second bulge-structure P2 is greater than or equal to 1.6.The material of second bulge-structure P2 is, for example, sub- gram of high crosslinking
The combination of power resin (Crosslinked acrylic resin), other high molecular materials or above-mentioned material, but the present invention not with
This is limited.In this present embodiment, first bulge-structure P1 and second bulge-structure P2 of the refractive index more than or equal to 1.6 can be excellent
Coordinating with light guide plate 210 for choosing, makes the light for leaving the first prismatic lens 230 and the second prismatic lens 240 more concentrate.It is specific and
Speech is greater than or equal to refractive index for 1.6 prismatic lens, and best angle of incidence of light is 13~70 degree.
In this present embodiment, reflector plate R is set to the bottom surface B of light guide plate 210.In some embodiments, reflector plate R's is anti-
Penetrate rate be greater than or equal to 95%, in detail, with visible wavelength range for 380~780nm from the point of view of, reflectivity is greater than or equal to
95%, to increase optics utilization rate, and then improve brightness.In some embodiments, in reflector plate further include diffusion particle, it can
The case where reflector plate is adsorbed in light guide plate is decreased in, but invention is not limited thereto.
Fig. 2 is the light distribution figure according to a kind of light guide plate of one embodiment of the invention.Fig. 3 is real according to of the invention one
Apply a kind of light distribution figure of light guide plate of example.Fig. 4 is the light distribution figure according to a kind of light guide plate of one embodiment of the invention.Figure
2~Fig. 4 is, for example, the light distribution figure of the light guide plate of the embodiment of Fig. 1.
Fig. 2 is the light that is provided of light source 220 after light guide plate 210, the light distribution figure under different angle.Citing
For, Fig. 2 is, for example, the light that sends out of the light source 220 in Fig. 1 after entering light guide plate 210, and light guide plate is left with different angle
The light distribution figure at 210 centers.
Fig. 3 is the light that is provided of light source 220 after light guide plate 210, leaves light-emitting surface E's with different vertical angle α
The light distribution figure of light, wherein vertical angle α can be positive value or negative value.The unit of the longitudinal axis of Fig. 3 is nits and horizontal axis unit is
Degree.Please refer to Fig.1 and Fig. 3, be 90 degree with second direction D2 and be 0 degree with first direction D1, light in first direction D1 with
In the light distribution on plane X that second direction D2 is constituted, vertical angle α is, for example, the light and first direction D1 for leaving light-emitting surface E
Angle on plane X, and the vertical angle α between first direction D1 and second direction D2 be positive value, first direction D1 with it is opposite
Vertical angle α between the direction of second direction D2 is negative value.In other words, while compares figure 2, then Fig. 3 has corresponded to the line segment of Fig. 2
L1, in fig. 2, central point have corresponded to 0 degree of Fig. 3, and the vertical angle α in Fig. 2 above line segment L1 is bigger, is more leaned in Fig. 2
Vertical angle α below near line section L1 is smaller.In the present embodiment, it in the light distribution on plane X, is left out with 13 degree~70 degree
The some light of smooth surface E occupies 35% or more of the gross energy for the light for leaving light-emitting surface E, wherein again preferably with 40% or more.
In other words, light is preferably concentrated on leaves light-emitting surface E with 13 degree~70 degree of vertical angle α, and whereby, light guide plate 210 can be excellent
Choosing coordinates with prismatic lens (being, for example, the first prismatic lens 230 and the second prismatic lens 240) to increase the optical brightness of display device.
The Energy distribution of light above-mentioned can for example be acquired by the integral area of the light distribution figure of Fig. 3, i.e., 13 degree~70 degree of range
Interior integral area occupies 35% of total mark area or more, and again preferred with 40% or more.
In the present embodiment, in the light distribution on plane X, the maximum brightness for leaving the light of light-emitting surface E is located at 80 degree
~90 degree.In other words, in the present embodiment, with vertical angle α be 80 degree~90 degree light for leaving light-emitting surface E brightness most
Greatly.
Fig. 4 is the light distribution figure for the light that the light that light source 220 is provided arrives at display module 100 with different level angle beta,
Wherein horizontal angle beta can be positive value or negative value.Horizontal angle beta is, for example, that the light of arrival display module 100 exists with first direction D1
Angle on plane Y, and the horizontal angle beta between first direction D1 and third direction D3 be positive value, first direction D1 in contrast to
Horizontal angle beta between the direction of third direction D3 is negative value.In other words, while compares figure 2, then Fig. 3 has corresponded to the line segment of Fig. 2
L2.In some embodiments, the light that light source 220 is sent out can pass through light guide plate 210, the first prismatic lens 230, the second prismatic lens
240 and other optical diaphragms (be, for example, diffusion sheet, brightness enhancement film (Dual Brightness Enhancement Film,
DBEF) or other optical diaphragms), then just arrive at display module 100.The unit of the longitudinal axis of Fig. 4 is nits and horizontal axis unit is
Degree.It please refers to Fig.1 and Fig. 4, is 90 degree with third direction D3 and is 0 degree with first direction D1, leave the light of light-emitting surface E in
The halfwidth for the light distribution on plane Y that one direction D1 is constituted with third direction D3 is about 49 degree~52 degree, and wherein halfwidth is
Half briliancy angle of the light before entering display module 100, and it is just to contain by region that horizontal angle beta is negative value and horizontal angle beta
The region of value, whereby, the light that backlight module 200 is sent out can more collimate, in some embodiments, the visual angle of display device
It is spent for -24.5~+24.5, that is, forms the symmetrical viewing angle distribution of positive value, negative value angle on the basis of first direction D1, half
High width is 49 degree, but invention is not limited thereto.In other embodiment, the visual angle of display device can be -10~+39 degree, also
Positive value, the asymmetric viewing angle distribution of negative value angle are formed i.e. on the basis of first direction D1.
Fig. 5 is the strabismus schematic diagram according to a kind of display device of one embodiment of the invention.Herein it should be noted that,
The embodiment of Fig. 5 continues to use the element numbers and partial content of the embodiment of Fig. 1, wherein being indicated using identical or approximate label
Identical or approximate element, and the explanation of same technique content is omitted.Explanation about clipped can refer to aforementioned reality
Example is applied, this will not be repeated here.
The main difference of the embodiment of Fig. 5 and the embodiment of Fig. 1 is：The backlight module 200 of the display device 20 of Fig. 5 is also
Including diffusion sheet 250.Diffusion sheet 250 is for example parallel to the light-emitting surface E of light guide plate 210 and is arranged.Referring to FIG. 5, diffusion sheet 250
It is set between light guide plate 210 and first prismatic lens 230.
Fig. 6 is the light distribution figure according to a kind of diffusion sheet of one embodiment of the invention.Fig. 6 is that light source 220 is provided
Light is after diffusion sheet 250, the light distribution figure under different angle.For example, Fig. 6 is, for example, the light source 220 in Fig. 5
The light sent out leaves the light point at 250 center of diffusion sheet with different angle by light guide plate 210 and after entering diffusion sheet 250
Butut.Fig. 7 is according to a kind of light distribution figure of light guide plate of one embodiment of the invention, the e.g. leaded light of the embodiment of Fig. 5
The light distribution figure of plate.Specifically, the light that Fig. 7, which is light source 220, to be provided is after light guide plate 210, with different vertical angle α
The light distribution figure of the light of light-emitting surface E is left, wherein vertical angle α can be positive value or negative value.The unit of the longitudinal axis of Fig. 7 is nits
And horizontal axis unit is degree.
Fig. 5 and Fig. 7 are please referred to, is 90 degree with second direction D2 and is 0 degree with first direction D1, in light in first direction
In the light distribution on plane X that D1 is constituted with second direction D2, vertical angle α is, for example, the light and first party for leaving light-emitting surface E
To angles of the D1 on plane X.In other words, while compares figure 6, then Fig. 7 has corresponded to the line segment L1 of Fig. 6.In the present embodiment, exist
In light distribution on plane X, the total of the light for leaving light-emitting surface E is occupied with 13 degree~70 degree some lights for leaving light-emitting surface E
35% or more of energy, wherein again preferably with 40% or more.In other words, light preferably concentrates on vertical with 13 degree~70 degree
Angle α leaves light-emitting surface E, and whereby therefore, light guide plate 210 can (be, for example, preferably the first prismatic lens 230 and second with prismatic lens
Prismatic lens 240) coordinate to increase the optical brightness of display device.The Energy distribution of light above-mentioned for example can be by the light of Fig. 6
The integral area of distribution map acquires, i.e., the integral area in the range of 13 degree~70 degree occupies 35% of total mark area or more,
And it is again preferred with 40% or more.
In the present embodiment, in the light distribution on plane X, the maximum brightness for leaving the light of light-emitting surface E is located at 80 degree
~90 degree.In other words, in the present embodiment, with vertical angle α be 80 degree~90 degree light for leaving light-emitting surface E brightness most
Greatly.
Fig. 8 is the light distribution figure according to a kind of diffusion sheet of one embodiment of the invention.Fig. 9 is real according to of the invention one
Apply a kind of light distribution figure of diffusion sheet of example.Fig. 7~Fig. 9 is, for example, the light distribution figure of the diffusion sheet of the embodiment of Fig. 5.
Fig. 8 is the light that is provided of light source 220 after light guide plate 210 and diffusion sheet 250, with different vertical angle γ
The light distribution figure wherein vertical angle γ for leaving the light of diffusion sheet 250 can be positive value or negative value.The unit of the longitudinal axis of Fig. 8 is
Nits and horizontal axis unit are degree.Fig. 5 and Fig. 8 are please referred to, is 90 degree with second direction D2 and is 0 degree with first direction D1, in light
For line in the light distribution on the plane X that first direction D1 and second direction D2 are constituted, vertical angle γ is, for example, to leave diffusion sheet 250
Light and angles of the first direction D1 on plane X, and the vertical angle γ between first direction D1 and second direction D2 is just
Vertical angle γ between value, first direction D1 and direction in contrast to second direction D2 is negative value.In other words, while compares figure 6,
Then Fig. 8 has corresponded to the line segment L1 of Fig. 6, and in figure 6, central point has corresponded to 0 degree of Fig. 8, hanging down above line segment L1 in Fig. 6
Right angle γ is bigger, and the vertical angle γ in Fig. 6 below line segment L1 is smaller.In the present embodiment, the light distribution on plane X
In, occupied with 13 degree~70 degree some lights for leaving diffusion sheet 250 the 70% of the gross energy for the light for leaving light-emitting surface E with
On.In other words, light is preferably concentrated on leaves diffusion sheet 250 with 13 degree~70 degree of vertical angle γ.Whereby, light guide plate 210
And diffusion sheet 250 can be preferably aobvious to increase with prismatic lens (being, for example, the first prismatic lens 230 and the second prismatic lens 240) cooperation
The optical brightness of showing device.The Energy distribution of light above-mentioned can for example be acquired by the integral area of the light distribution figure of Fig. 8, i.e.,
Integral area in the range of 13 degree~70 degree occupies 70% of total mark area or more.
In the present embodiment, in the light distribution on plane X, the maximum brightness for leaving the light of diffusion sheet 250 is located at 40
~60 degree of degree.In other words, in the present embodiment, it is the brightness of 40 degree~60 degree light for leaving light-emitting surface E with vertical angle γ
It is maximum.
Fig. 9 is the light distribution figure for the light that the light that light source 220 is provided arrives at display module 100 with different level angle δ.
Wherein horizontal angle δ can be positive value or negative value.Horizontal angle δ is, for example, that the light of arrival display module 100 exists with first direction D1
Angle on plane Y, and the horizontal angle δ between first direction D1 and third direction D3 be positive value, first direction D1 in contrast to
Horizontal angle δ between the direction of third direction D3 is negative value.In other words, while compares figure 6, then Fig. 9 has corresponded to the line segment of Fig. 6
L2.In some embodiments, the light that light source 220 is sent out can pass through light guide plate 210, the first prismatic lens 230, the second prismatic lens
240 and other optical diaphragms (being, for example, diffusion sheet, reflecting type polarizing brightening piece or other optical diaphragms), it then just arrives at aobvious
Show module 100.The unit of the longitudinal axis of Fig. 9 is nits and horizontal axis unit degree of being.Fig. 5 and Fig. 9 are please referred to, with third direction D3 for 90
It spends and with first direction D1 for 0 degree, arrives at the plane that the light of display module 100 is constituted in first direction D1 and third direction D3
The halfwidth of light distribution on Y is about 49 degree~52 degree, and wherein halfwidth is half briliancy of the light before entering display module 100
Angle, and contain by the region that horizontal angle δ is negative value and the region that horizontal angle δ is positive value, whereby, backlight module 200 is sent out
The light gone out can be collimated more, and in some embodiments, the visual angle of display device is -24.5~+24.5 degree, that is, with first party
On the basis of to D1 and formed positive value, negative value angle symmetrical viewing angle distribution, halfwidth be 49 degree, but the present invention not as
Limit.In other embodiment, the visual angle of display device can be -10~+39 degree, that is, be formed just on the basis of first direction D1
Value, the asymmetric viewing angle distribution of negative value angle.
In conclusion the display device of the present invention by adjusting light by light guide plate or light by light guide plate and
Angle after diffusion sheet can make backlight module have higher brightness, and can reduce the energy consumed needed for display device.
In some embodiments, the level of light can be further reduced by light guide plate the first prismatic lens of collocation and the second prismatic lens
Angle makes light more concentrate, and further increases the brightness of backlight module.
Although the present invention is disclosed as above with embodiment, however, it is not to limit the invention, any technical field
Middle technical staff, without departing from the spirit and scope of the invention, when can make a little variation and retouching, therefore the protection of the present invention
Range is when subject to as defined in claim.
Claims (12)
1. a kind of display device, including：
One display module；And
One backlight module, the display module is stacked at along a first direction, which includes：
One light guide plate, the light-emitting surface with an incidence surface, a bottom surface and the opposite bottom surface, and the first direction is perpendicular to this
Light-emitting surface；
A plurality of light sources are set to the incidence surface, have most short spacing in those light sources in a second direction and the light guide plate, and
Those light sources are arranged along a third direction, and wherein the first direction, the second direction and the third direction are mutually orthogonal；With
And
One first prismatic lens, are set to the light-emitting surface, and first prismatic lens have a plurality of first bulge-structures, and those the
The refractive index of one bulge-structure is greater than or equal to 1.6, wherein
The light that those light sources are provided passes through the light guide plate, wherein being 90 degree with the second direction and being with the first direction
0 degree, in the light in the light distribution in the plane that the first direction and the second direction are constituted, this is left with 13 degree~70 degree
The part of the light-emitting surface light occupies 35% or more of the gross energy for the light for leaving the light-emitting surface.
2. display device as described in claim 1, wherein be 90 degree with the second direction and be 0 degree with the first direction,
The light leaves the light of the light-emitting surface most in the light distribution in the plane that the first direction and the second direction are constituted
Big brightness is located at 80 degree~90 degree.
3. display device as described in claim 1, the wherein backlight module also include：
One second prismatic lens are set between first prismatic lens and the light guide plate, and second prismatic lens have a plurality of the
Two bulge-structures, and the refractive index of those the second bulge-structures is greater than or equal to 1.6.
4. display device as described in claim 1, the wherein backlight module also include：
One reflector plate is set to the bottom surface of the light guide plate, and the reflectivity of the reflector plate is greater than or equal to 95%.
5. display device as described in claim 1 is supported wherein being 90 degree with the third direction and being 0 degree with the first direction
The light up to the display module is about in the halfwidth of the light distribution in the plane that the first direction is constituted with the third direction
49 degree~52 degree.
6. display device as described in claim 1, the wherein backlight module also include：
One diffusion sheet is set between the light guide plate and first prismatic lens, and the light passes through the diffusion sheet, wherein with this
Two directions are 90 degree and are 0 degree with the first direction, in the light in the plane that the first direction and the second direction are constituted
Light distribution in, occupy 70% or more of the light gross energy with 13 degree~70 degree part for leaving diffusion sheet light.
7. display device as claimed in claim 6 is supported wherein being 90 degree with the third direction and being 0 degree with the first direction
The light up to the display module is about in the halfwidth of the light distribution in the plane that the first direction is constituted with the third direction
49 degree~52 degree.
8. display device as described in claim 1, the wherein backlight module include：
One reflector plate is set to the bottom surface of the light guide plate, and the reflector plate includes diffusion particle.
9. a kind of display device, including：
One display module；And
One backlight module, the display module is stacked in a first direction, which includes：
One light guide plate, the light-emitting surface with an incidence surface, a bottom surface and the opposite bottom surface；
A plurality of light sources are set to the incidence surface, have most short spacing in those light sources in a second direction and the light guide plate, and
Those light sources are arranged along a third direction, and wherein the first direction, the second direction and the third direction are mutually orthogonal；With
And
One first prismatic lens, are set to the light-emitting surface, and first prismatic lens have a plurality of first bulge-structures, and those the
The refractive index of one bulge-structure is greater than or equal to 1.6, wherein
The light that those light sources are provided passes through the light guide plate, wherein being 90 degree with the second direction and being with the first direction
0 degree, in the light in the light distribution in the plane that the first direction and the second direction are constituted, leave the light of the light-emitting surface
The maximum brightness of line is located at 80 degree~90 degree.
10. display device as claimed in claim 9 is supported wherein being 90 degree with the third direction and being 0 degree with the first direction
The light up to the display module is about in the halfwidth of the light distribution in the plane that the first direction is constituted with the third direction
49 degree~52 degree.
11. display device as claimed in claim 9, the wherein backlight module also include：
One diffusion sheet is set between the light guide plate and first prismatic lens, and the light passes through the diffusion sheet, wherein with this
Two directions are 90 degree and are 0 degree with the first direction, in the light in the plane that the first direction and the second direction are constituted
Light distribution in, occupy 70% or more of the light gross energy with 13 degree~70 degree part for leaving light-emitting surface light.
12. display device as claimed in claim 11, wherein be 90 degree with the third direction and be 0 degree with the first direction,
Arrive at the light of the display module in the light distribution in the plane that the first direction and the third direction are constituted halfwidth about
It is 49 degree~52 degree.
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| TW107107474A TWI657277B (en) | 2018-03-06 | 2018-03-06 | Display device |
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| Publication number | Publication date |
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| TW201939080A (en) | 2019-10-01 |
| CN108646465B (en) | 2021-09-10 |
| TWI657277B (en) | 2019-04-21 |
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