CN105425468A - Straight-down-type backlight module and display device - Google Patents
Straight-down-type backlight module and display device Download PDFInfo
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- CN105425468A CN105425468A CN201610004448.XA CN201610004448A CN105425468A CN 105425468 A CN105425468 A CN 105425468A CN 201610004448 A CN201610004448 A CN 201610004448A CN 105425468 A CN105425468 A CN 105425468A
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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
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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
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- 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
- G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one
-
- 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
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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)
- Liquid Crystal (AREA)
Abstract
The invention discloses a straight-down-type backlight module and a display device, and relates to the technical field of display, and solves problems in the prior art that luminous energy utilization efficiency of the straight-down-type backlight module is low. The straight-down-type backlight module comprises a plurality of point light sources. The point light sources can emit divergent light. A light collimation element and a polarizing beam splitting transition element are arranged between each point light source and a display panel. The divergent light emitted by the point light sources enters a lower polarizing film of the display panel through the light collimation element and the polarizing beam splitting transition element in sequence. The light collimation element is used to transform the divergent light emitted by the point light sources to parallel light. The polarizing beam splitting transition element is used to transform the parallel light to polarized light whose vibration direction is the same with the polarization direction of the lower polarizing film. The straight-down-type backlight module is used to provide light for the display panel.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of down straight aphototropism mode set and display device.
Background technology
Along with the continuous progress of LCD (LiquidCrystalDisplay, liquid crystal display) display technique, LCD has been widely used in various display field, because LCD self is not luminous, therefore needs backlight module to provide light for LCD.
Down straight aphototropism mode set of the prior art provides natural light usually, natural light does not have specific direction of vibration, and lower polaroid usual allowable vibration direction of LCD display panel polarized light identical with its polarization direction through, the polarized light of other direction of vibration then can be consumed by absorbing, and causes the optical energy utilization efficiency of down straight aphototropism mode set very low.
Summary of the invention
Embodiments of the invention provide a kind of down straight aphototropism mode set and display device, can solve the problem that down straight aphototropism mode set optical energy utilization efficiency of the prior art is low.
For achieving the above object, embodiments of the invention adopt following technical scheme:
Embodiments provide a kind of down straight aphototropism mode set, for providing light for display panel, comprise multiple pointolite, described pointolite can send diverging light, be provided with light collimating element and polarization spectro conversion element between each described pointolite and described display panel, the diverging light that described pointolite sends can inject the lower polaroid of described display panel successively after described light collimating element and described polarization spectro conversion element;
Described light collimating element is used for the diverging light that described pointolite sends to be converted to directional light;
Described polarization spectro conversion element is used for described directional light to be converted to the direction of vibration polarized light identical with the polarization direction of described lower polaroid.
Preferably, described polarization spectro conversion element comprises polarization spectro deielectric-coating and polarization conversion deielectric-coating;
Described polarization spectro deielectric-coating is positioned on the travel path of described directional light, described polarization spectro deielectric-coating is used for described directional light to be divided into mutually perpendicular first polarized light of direction of vibration and the second polarized light, described first polarized light injects described lower polaroid through described polarization spectro deielectric-coating, and described second polarized light is reflected by described polarization spectro deielectric-coating;
Described polarization conversion deielectric-coating is positioned on the travel path of described second polarized light, described polarization conversion deielectric-coating can make the direction of vibration of described second polarized light change, and make described second polarized light through primary event, identical with described first polarized light direction of vibration to be formed, and the 3rd polarized light of described lower polaroid can be injected, described first polarized light is identical with the polarization direction of described lower polaroid with the direction of vibration of described 3rd polarized light.
Further, described polarization conversion deielectric-coating and described polarization spectro deielectric-coating be arranged in parallel.
Alternatively, described polarization spectro conversion element also comprises prism, and described prism comprises the first side and the second side that are oppositely arranged, and described first side is provided with described polarization spectro deielectric-coating, and described second side is provided with described polarization conversion deielectric-coating.
Preferably, described light collimating element is convex lens, the primary optical axis of described convex lens is vertical with described display panel, described prism also comprises three side all vertical with the primary optical axis of described convex lens and the 4th side, described directional light injects described polarization spectro deielectric-coating by described 3rd side, and described 3rd polarized light injects described lower polaroid by described 4th side.
Further, described first side is the first exiting surface of described prism, described 4th side is the second exiting surface of described prism, described first exiting surface and the described second exiting surface bright dipping region being projected as described polarization spectro conversion element on said display panel, the described bright dipping region splicing of adjacent two described polarization spectro conversion elements.
Alternatively, multiple described pointolite is evenly arranged.
Alternatively, multiple described pointolite is arranged with layer, and multiple described light collimating element is arranged with layer, and multiple described polarization spectro conversion element is arranged with layer.
Alternatively, described pointolite is LED point light source.
The down straight aphototropism mode set that the embodiment of the present invention provides, the diverging light that pointolite sends is converted to directional light after described light collimating element, directional light forms the direction of vibration polarized light identical with the polarization direction of polaroid under display panel after described polarization spectro conversion element, then injects the lower polaroid of described display panel.The light provided due to this down straight aphototropism mode set is the polarized light that direction of vibration is identical with the polarization direction of described lower polaroid, therefore, the light that this down straight aphototropism mode set provides is all by the lower polaroid of display panel, thus avoid a part of light and consumed by absorbing, and then improve the optical energy utilization efficiency of down straight aphototropism mode set.
The embodiment of the present invention additionally provides a kind of display device, comprises display panel, also comprises the down straight aphototropism mode set in above-mentioned arbitrary technical scheme.
The display device that the embodiment of the present invention provides, the diverging light that pointolite in its down straight aphototropism mode set sends is converted to directional light after described light collimating element, directional light forms the direction of vibration polarized light identical with the polarization direction of polaroid under display panel after described polarization spectro conversion element, then injects the lower polaroid of described display panel.The light provided due to this down straight aphototropism mode set is the polarized light that direction of vibration is identical with the polarization direction of described lower polaroid, therefore, the light that this down straight aphototropism mode set provides is all by the lower polaroid of display panel, thus avoid a part of light and consumed by absorbing, and then improve the optical energy utilization efficiency of down straight aphototropism mode set and the brightness of display device.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention down straight aphototropism mode set;
Fig. 2 is the propagation schematic diagram of light in embodiment of the present invention down straight aphototropism mode set;
Reference numeral:
1-display panel; Polaroid under 11-; 2-pointolite;
3-light collimating element; 4-polarization spectro conversion element; 41-polarization spectro deielectric-coating;
42-polarization conversion deielectric-coating; 43-prism; 431-the 3rd side;
432-the 4th side; 44-right-angle prism; 5-first polarized light;
6-second polarized light; 7-the 3rd polarized light.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
Embodiments provide a kind of down straight aphototropism mode set, as shown in Figure 1, this down straight aphototropism mode set, for providing light for display panel 1, comprise multiple pointolite 2, pointolite 2 can send diverging light, is provided with light collimating element 3 and polarization spectro conversion element 4 between each pointolite 2 and display panel 1, and the diverging light that pointolite 2 sends can inject the lower polaroid 11 of display panel 1 successively after light collimating element 3 and polarization spectro conversion element 4; Light collimating element 3 is converted to directional light for the diverging light sent by pointolite 2; Polarization spectro conversion element 4 is for being converted to the direction of vibration polarized light identical with the polarization direction of lower polaroid 11 by described directional light.
The down straight aphototropism mode set that the embodiment of the present invention provides, the diverging light that pointolite 2 sends is converted to directional light after light collimating element 3, directional light forms the identical polarized light of the polarization direction of direction of vibration and display panel 1 time polaroid 11 after polarization spectro conversion element 4, then injects the lower polaroid 11 of display panel 1.The light provided due to this down straight aphototropism mode set is the polarized light that direction of vibration is identical with the polarization direction of lower polaroid 11, therefore, the light that this down straight aphototropism mode set provides is all by the lower polaroid 11 of display panel 1, thus avoid a part of light and consumed by absorbing, and then improve the optical energy utilization efficiency of down straight aphototropism mode set.
With reference to Fig. 2, above-mentioned polarization spectro conversion element 4 comprises polarization spectro deielectric-coating 41 and polarization conversion deielectric-coating 42; Polarization spectro deielectric-coating 41 is positioned on the travel path of described directional light, and polarization spectro deielectric-coating 41 is for being divided into described directional light in mutually perpendicular first polarized light 5 of direction of vibration and the second polarized light 6, Fig. 2
represent the first polarized light 5 and be hereafter about to the direction of vibration of the 3rd polarized light 7 mentioned, " " represents the direction of vibration of the second polarized light 6, first polarized light 5 is injected lower polaroid 11, second polarized light 6 through polarization spectro deielectric-coating 41 and is polarized light splitting deielectric-coating 41 and reflects; It should be noted that, when arranging polarization spectro deielectric-coating 41, need to adjust the angle between polarization spectro deielectric-coating 41 and described directional light, incident angle when making described directional light inject polarization spectro deielectric-coating 41 is 45 degree, now, described directional light can be divided into mutually perpendicular first polarized light 5 and the second polarized light 6 of direction of vibration by polarization spectro deielectric-coating 41;
Polarization conversion deielectric-coating 42 is positioned on the travel path of the second polarized light 6, polarization conversion deielectric-coating 42 can make the direction of vibration of the second polarized light 6 change, and make the second polarized light 6 through primary event, identical with the first polarized light 5 direction of vibration to be formed, and the 3rd polarized light 7, first polarized light 5 can injecting lower polaroid 11 is identical with the polarization direction of lower polaroid 11 with the direction of vibration of the 3rd polarized light 7.The down straight aphototropism mode set that the embodiment of the present invention provides, by polarization spectro deielectric-coating 41, the second polarized light 6 not by lower polaroid 11 is separated, second polarized light 6 is converted to the 3rd polarized light 7 by lower polaroid 11 by polarization conversion deielectric-coating 42 again, thus avoid the waste of the second polarized light 6, and then optical energy utilization efficiency is got a promotion.
With reference to Fig. 2, directional light is being divided into the first polarized light 5 and the second polarized light 6 after polarization spectro deielectric-coating 41, first polarized light 5 is directly through polarization spectro deielectric-coating 41, its direction of propagation is consistent with the direction of propagation of described directional light, second polarized light 6 is polarized light splitting deielectric-coating 41 and reflexes on polarization conversion deielectric-coating 42, and its direction of propagation is vertical with the direction of propagation of the first polarized light 5; In addition, because reflection angle equals incident angle, and the incident angle that described directional light injects polarization spectro deielectric-coating 41 is 45 degree, and therefore, the reflection angle of the second polarized light 6 is also 45 degree;
Now, the set-up mode of polarization conversion deielectric-coating 42 has multiple, and such as, polarization conversion deielectric-coating 42 can be arranged in parallel with polarization spectro deielectric-coating 41, and certainly, polarization conversion deielectric-coating 42 also can be not parallel with polarization spectro deielectric-coating 41.When polarization conversion deielectric-coating 42 be arranged in parallel with polarization spectro deielectric-coating 41, the incident angle that second polarized light 6 injects polarization conversion deielectric-coating 42 is also 45 degree, the reflection angle of the 3rd polarized light 7 should be 45 degree mutually, therefore, angle between 3rd polarized light 7 and the second polarized light 6 is 90 degree, namely the 3rd polarized light 7 is vertical with the direction of propagation of the second polarized light 6, because the first polarized light 5 is same vertical with the direction of propagation of the second polarized light 6, therefore, the 3rd polarized light 7 can be released parallel with the direction of propagation of the first polarized light 5, thus avoid the 3rd polarized light 7 and the first polarized light 5 to produce overlapping, and then make described down straight aphototropism mode set bright dipping evenly.Therefore, in the present embodiment, preferred polarization conversion deielectric-coating 42 be arranged in parallel with polarization spectro deielectric-coating 41.
Polarization spectro conversion element 4 in the present embodiment also comprises prism 43, as shown in Figure 2, prism 43 comprises the first side and the second side that are oppositely arranged, and described first side is provided with polarization spectro deielectric-coating 41, and described second side is provided with polarization conversion deielectric-coating 42.Prism 43 can be played a supporting role to polarization spectro deielectric-coating 41 and polarization conversion deielectric-coating 42 simultaneously, but also transmissive light, ensure the normal propagation of light.
Further, light collimating element 3 is convex lens, the primary optical axis of described convex lens is vertical with display panel 1, make the direction of propagation of described directional light vertical with display panel 1, prism 43 also comprises three side 431 all vertical with the primary optical axis of described convex lens and the 4th side 432, therefore, when described directional light injects prism 43 by the 3rd side 431, the refraction angle of described directional light is 0 degree, namely described directional light is still to inject polarization spectro deielectric-coating 41 perpendicular to the direction of propagation of display panel 1, thus ensure that the first polarized light 5 is vertical with display panel 1 with the direction of propagation of the 3rd polarized light 7, when the 3rd polarized light 7 is penetrated from prism 43 by the 4th side 432, the refraction angle of the 3rd polarized light 7 is also 0 degree, namely the direction of propagation of the 3rd polarized light 7 is still vertical with display panel 1.To sum up, the first polarized light 5 all vertically can inject display panel 1 with the 3rd polarized light 7, thus prevents light from penetrating from the edge of display panel 1, and then avoids the loss of light.
Prism 43 in above-described embodiment can select parallelogram prism, on described first side that polarization spectro deielectric-coating 41 and polarization conversion deielectric-coating 42 are arranged at described parallelogram prism respectively and described second side, be the 3rd side 431 near the side of convex lens in the side that other two of described parallelogram prism are relative, side away from described convex lens is the 4th side 432, angle between 3rd side 431 and described first side being provided with polarization spectro deielectric-coating 41 is 45 degree, the 3rd side 431 can be made so vertical with the primary optical axis of described convex lens, thus described directional light is not changed by direction of propagation during the 3rd side 431, and then make described directional light to inject polarization spectro deielectric-coating 41 perpendicular to the direction of propagation of display panel 1, angle between 4th side 432 and described first side being provided with polarization spectro deielectric-coating 41 is 135 degree, the 4th side 432 can be made so vertical with the primary optical axis of described convex lens, thus the 3rd polarized light 7 is not changed by direction of propagation during the 4th side 432, and then make the 3rd polarized light 7 can vertically inject display panel 1.
Certainly, polarization spectro deielectric-coating 41 and polarization conversion deielectric-coating 42 also can be arranged on different prisms, such as, polarization conversion deielectric-coating 42 is still arranged on described second side of above-mentioned parallelogram prism, polarization spectro deielectric-coating 41 can be arranged on the inclined-plane of a right-angle prism 44, fit in described first side of described inclined-plane and described parallelogram prism, thus form a right-angled trapezium prism, as shown in Figure 2, the principal section of described right-angled trapezium prism is right-angled trapezium, now, polarization spectro deielectric-coating 41 is between described inclined-plane and described first side, described directional light injects described right-angled trapezium prism from the side (i.e. the 3rd side 431) at described right-angled trapezium prism upper base place, then inject polarization spectro deielectric-coating 41, first polarized light 5 and the 3rd polarized light 7 go to the bottom side (i.e. the plane of the right-angle surface composition of the 4th side 432 and the right-angle prism 44) injection at place to display panel 1 by described right-angled trapezium prism.
It should be noted that, the side of described right-angled trapezium prism is the plane of light or outgoing, and the principal section of described right-angled trapezium prism is the plane with described lateral vertical.
When polarization spectro deielectric-coating 41 and polarization conversion deielectric-coating 42 are all located on prism 43, first polarized light 5 penetrates from prism 43 through after polarization spectro deielectric-coating 41, 3rd polarized light 7 is penetrated from prism 43 by the 4th side 432, therefore, described first side being provided with polarization spectro deielectric-coating 41 is the first exiting surface of prism 43, 4th side 432 is the second exiting surface of prism 43, first exiting surface described in the present embodiment and the described second exiting surface bright dipping region being projected as polarization spectro conversion element 4 on display panel 1, the described bright dipping region splicing of two adjacent polarization spectro conversion elements 4, thus, can ensure that described down straight aphototropism mode set bright dipping is continuous and even.
With reference to Fig. 1, the multiple pointolites 2 in the present embodiment are preferably evenly arrangement, equally also can improve the homogeneity of described down straight aphototropism mode set bright dipping.
In order to reduce the thickness of described down straight aphototropism mode set, multiple pointolites 2 in the present embodiment are arranged with layer, multiple light collimating element 3 is arranged with layer, multiple polarization spectro conversion element 4 is arranged with layer, thus, the space that multiple pointolite 2, multiple light collimating element 3 and multiple polarization spectro conversion element 4 can be made to take along described down straight aphototropism mode set thickness direction is minimum, thus reduces the integral thickness of described down straight aphototropism mode set.
Pointolite 2 is LED point light source, and LED point light source has that light decay is little, the life-span is long, luminescence efficiency advantages of higher, can ensure serviceable life and the luminescence efficiency of described down straight aphototropism mode set.
The embodiment of the present invention additionally provides a kind of display device, as shown in Figure 1, comprises display panel 1, also comprises the down straight aphototropism mode set described in above-mentioned any embodiment.
The display device that the embodiment of the present invention provides, the diverging light that pointolite 2 in its down straight aphototropism mode set sends is converted to directional light after light collimating element 3, directional light forms the identical polarized light of the polarization direction of direction of vibration and display panel 1 time polaroid 11 after polarization spectro conversion element 4, then injects the lower polaroid 11 of display panel 1.The light provided due to this down straight aphototropism mode set is the polarized light that direction of vibration is identical with the polarization direction of lower polaroid 11, therefore, the light that this down straight aphototropism mode set provides is all by the lower polaroid 11 of display panel 1, thus avoid a part of light and consumed by absorbing, and then improve the optical energy utilization efficiency of down straight aphototropism mode set and the brightness of display device.
Other formations about the display device of the embodiment of the present invention wait known by those skilled in the art, no longer describe in detail at this.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a down straight aphototropism mode set, for providing light for display panel, comprise multiple pointolite, described pointolite can send diverging light, it is characterized in that, be provided with light collimating element and polarization spectro conversion element between each described pointolite and described display panel, the diverging light that described pointolite sends can inject the lower polaroid of described display panel successively after described light collimating element and described polarization spectro conversion element;
Described light collimating element is used for the diverging light that described pointolite sends to be converted to directional light;
Described polarization spectro conversion element is used for described directional light to be converted to the direction of vibration polarized light identical with the polarization direction of described lower polaroid.
2. down straight aphototropism mode set according to claim 1, is characterized in that, described polarization spectro conversion element comprises polarization spectro deielectric-coating and polarization conversion deielectric-coating;
Described polarization spectro deielectric-coating is positioned on the travel path of described directional light, described polarization spectro deielectric-coating is used for described directional light to be divided into mutually perpendicular first polarized light of direction of vibration and the second polarized light, described first polarized light injects described lower polaroid through described polarization spectro deielectric-coating, and described second polarized light is reflected by described polarization spectro deielectric-coating;
Described polarization conversion deielectric-coating is positioned on the travel path of described second polarized light, described polarization conversion deielectric-coating can make the direction of vibration of described second polarized light change, and make described second polarized light through primary event, identical with described first polarized light direction of vibration to be formed, and the 3rd polarized light of described lower polaroid can be injected, described first polarized light is identical with the polarization direction of described lower polaroid with the direction of vibration of described 3rd polarized light.
3. down straight aphototropism mode set according to claim 2, is characterized in that, described polarization conversion deielectric-coating and described polarization spectro deielectric-coating be arranged in parallel.
4. down straight aphototropism mode set according to claim 3, it is characterized in that, described polarization spectro conversion element also comprises prism, described prism comprises the first side and the second side that are oppositely arranged, described first side is provided with described polarization spectro deielectric-coating, and described second side is provided with described polarization conversion deielectric-coating.
5. down straight aphototropism mode set according to claim 4, it is characterized in that, described light collimating element is convex lens, the primary optical axis of described convex lens is vertical with described display panel, described prism also comprises three side all vertical with the primary optical axis of described convex lens and the 4th side, described directional light injects described polarization spectro deielectric-coating by described 3rd side, and described 3rd polarized light injects described lower polaroid by described 4th side.
6. down straight aphototropism mode set according to claim 5, it is characterized in that, described first side is the first exiting surface of described prism, described 4th side is the second exiting surface of described prism, described first exiting surface and the described second exiting surface bright dipping region being projected as described polarization spectro conversion element on said display panel, the described bright dipping region splicing of adjacent two described polarization spectro conversion elements.
7. down straight aphototropism mode set according to claim 1, is characterized in that, multiple described pointolite is evenly arranged.
8. down straight aphototropism mode set according to claim 1, is characterized in that, multiple described pointolite is arranged with layer, and multiple described light collimating element is arranged with layer, and multiple described polarization spectro conversion element is arranged with layer.
9. down straight aphototropism mode set according to claim 1, is characterized in that, described pointolite is LED point light source.
10. a display device, comprises display panel, it is characterized in that, also comprises the down straight aphototropism mode set according to any one of claim 1 ~ 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610004448.XA CN105425468A (en) | 2016-01-04 | 2016-01-04 | Straight-down-type backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610004448.XA CN105425468A (en) | 2016-01-04 | 2016-01-04 | Straight-down-type backlight module and display device |
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| Publication Number | Publication Date |
|---|---|
| CN105425468A true CN105425468A (en) | 2016-03-23 |
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| CN201610004448.XA Pending CN105425468A (en) | 2016-01-04 | 2016-01-04 | Straight-down-type backlight module and display device |
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| CN109188695B (en) * | 2018-09-29 | 2021-11-30 | 北京蚁视科技有限公司 | Thin type large-field-angle near-to-eye display device |
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Application publication date: 20160323 |