CN102323690A - Display system with wide horizontal viewing angle range and narrow vertical viewing angle range - Google Patents
Display system with wide horizontal viewing angle range and narrow vertical viewing angle range Download PDFInfo
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- CN102323690A CN102323690A CN2011102663119A CN201110266311A CN102323690A CN 102323690 A CN102323690 A CN 102323690A CN 2011102663119 A CN2011102663119 A CN 2011102663119A CN 201110266311 A CN201110266311 A CN 201110266311A CN 102323690 A CN102323690 A CN 102323690A
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- 230000001788 irregular Effects 0.000 claims description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 37
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- 238000010586 diagram Methods 0.000 description 10
- 238000003306 harvesting Methods 0.000 description 6
- 241000826860 Trapezium Species 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 239000003595 mist Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
The invention relates to a display system, comprising a plane light source, a prism sheet, a lens sheet, a shutter sheet and an image forming panel. According to the display system, it defines the horizontal direction as well as the vertical direction itself. The light is emitted from the light emitting surface of the planar light source, passes through the prism sheet, the lens sheet and the louver sheet, and advances toward the image forming panel. The light is adjusted by the prism sheet, the lens sheet, and the louver sheet such that a horizontal viewing angle range with respect to a horizontal direction is higher than 95 degrees and a vertical viewing angle range with respect to a vertical direction is higher than 20 degrees. The invention can reduce the using amount of the backlight source or save the brightness or energy required by the backlight source.
Description
Technical field
The present invention is about a kind of display system (display system), especially liquid crystal display systems (LCD display system).And especially, the present invention is about having the display system of wide horizontal view angle scope and narrow vertical angle of view scope.
Background technology
Be used in the display system of some particular place, for example, its horizontal view angle scope of display system of automobile-used display system, traffic sign etc. is wide more good more, otherwise the vertical angle of view scope of these display systems needs restricted.For example, automobile-used display system need have wide horizontal view angle scope, lets driving and passenger all can see show image, and restricted vertical angle of view scope need be arranged, and projects the windshield of vehicle to avoid show image, influences the sight line of driving.In these display systems, its light of being launched by light source needs to adjust through a plurality of optical elements, reaches the purpose of wide horizontal view angle scope, narrow vertical angle of view scope.
Prior art about display system with wide horizontal view angle scope and narrow vertical angle of view scope for example has No. 2002124112 case of japanese patent application publication No. (with case one before calling in the following text) and TaiWan, China patent of invention notification number I253525 patent (with case two before calling in the following text).These two prior aries all are to the scheme that display system proposed that adopts display panels.
Yet it is too low and the horizontal view angle scope is still wide inadequately that the prior art with display system of wide horizontal view angle scope and narrow vertical angle of view scope still has integral brightness, for example is lower than 95 degree.
In addition, have the prior art of the display system of wide horizontal view angle scope and narrow vertical angle of view scope, (light-emitting diode, LED) during backlight, it is then quite a lot of to reach the required LED of a desired briliancy number if adopt side-lighting type light-emitting diode.So these prior aries have problems such as power consumption, the rising of operation temperature when adopting the side light type LED back light source.
Summary of the invention
Of the present invention one towards being to provide a kind of display system with wide horizontal view angle scope and narrow vertical angle of view scope, its horizontal view angle scope to be higher than 95 degree, and integral brightness is high.
Another side of the present invention can reduce the usage quantity of backlight or save required brightness or the energy of backlight to being to provide the liquid crystal display systems with wide horizontal view angle scope and narrow vertical angle of view scope.
Display system according to the first embodiment of the present invention itself defines a horizontal direction and a vertical direction, and comprises planar light source (planar light source), prism thin plate (prism sheet), lens thin plate (lens sheet) and window shutter thin plate (louver sheet).Planar light source has exiting surface, and the prism thin plate is arranged at the exiting surface top of planar light source.The prism thin plate comprises a plurality of strip micro-prism structures.A plurality of strip micro-prism structure along continuous straight runs are arranged in parallel.The lens thin plate is arranged at prism thin plate top.The lens thin plate comprises a plurality of microlens structures, and the window shutter thin plate is arranged at lens thin plate top.The window shutter thin plate comprises the little shutter of a plurality of strips (micro-louver).The little shutter of a plurality of strips vertically is arranged parallel to each other substantially, and from the horizontal by an angle.Light penetrates from the exiting surface of planar light source; Pass prism thin plate, lens thin plate and window shutter thin plate; By prism thin plate, lens thin plate and the adjustment of window shutter thin plate, cause the horizontal view angle scope of display system to be spent, and the vertical angle of view scope is for being higher than 20 degree for being higher than 95.
Display system according to a second embodiment of the present invention comprises planar light source, prism thin plate, lens thin plate, window shutter thin plate.The prism thin plate is arranged at the exiting surface top of planar light source, and the prism thin plate comprises a plurality of strip micro-prism structures.The lens thin plate is arranged at prism thin plate top, and is positioned at a side of opposite planar light source, and the lens thin plate comprises a plurality of microlens structures.The window shutter thin plate is arranged at lens thin plate top, and is positioned at a side of this prism thin plate relatively, and the window shutter thin plate comprises the little shutter of a plurality of strips.Each micro-prism structure is the trapezoidal of non-homogeneous along the cross section of its longitudinal axis.
In a specific embodiment, a plurality of little shutter of window shutter thin plate and this horizontal direction angulation scope are that about 0 degree is to about ± 10 degree.
In a specific embodiment, a plurality of microlens structures of lens thin plate are irregular arrangement.
In a specific embodiment, display system also further comprises and has polaroid, and polaroid is arranged at window shutter thin plate top, and and the window shutter thin plate between have spacing.
In a specific embodiment, two micro-prism structures that face mutually have spacing in a plurality of micro-prism structures of prism thin plate.
In a specific embodiment, a plurality of micro-prism structures of prism thin plate are towards planar light source, and a plurality of microlens structures of lens thin plate are towards the window shutter thin plate.
In another specific embodiment, a plurality of micro-prism structures of prism thin plate are towards the lens thin plate, and a plurality of microlens structures of lens thin plate are towards the prism thin plate.
Can graphicly further be understood through following detailed Description Of The Invention and appended about advantage of the present invention and spirit.
Description of drawings
Fig. 1 is the schematic appearance according to the display system of first preferred embodiment of the present invention;
Fig. 2 is the cross section view of the display system of Fig. 1 along the A-A line among Fig. 1;
Fig. 3 is the cross section view according to another variation of the display system of first preferred embodiment of the present invention;
Fig. 4 is the cross section view according to the display system of second preferred embodiment of the present invention;
Fig. 5 is the cross section view according to another variation of the display system of second preferred embodiment of the present invention;
Fig. 6 is its emulated data comparison diagrams about the horizontal direction briliancy of three kinds of liquid crystal display systemss;
Fig. 7 is its emulated data comparison diagrams about the vertical direction briliancy of three kinds of liquid crystal display systemss;
Fig. 8 is its emulated data comparison diagrams about the relative briliancy of horizontal direction of two kinds of liquid crystal display systemss;
Fig. 9 is its emulated data comparison diagrams about the relative briliancy of vertical direction of two kinds of liquid crystal display systemss.
Wherein, Reference numeral:
1: display system 10: planar light source
102: exiting surface 104: light-guide device
106: light emitting diode 11: frame
12: prism thin plate 122: micro-prism structure
14: lens thin plate 142: microlens structure
16: window shutter thin plate 162: little shutter
18: image forms panel 182: polaroid
H: horizontal direction V: vertical direction
N: normal direction L: the bearing of trend of little shutter
D: distance s: spacing
φ: angle theta: horizontal view angle scope
α: vertical angle of view scope
Embodiment
The present invention provides a kind of display system with wide horizontal view angle scope and narrow vertical angle of view scope, and its horizontal view angle scope is spent for being higher than 95, and its integral brightness is high.Below specific embodiment of the present invention will be detailed, use abundant explanation characteristic of the present invention, spirit, advantage and exploitativeness.
See also Fig. 1 and Fig. 2, Fig. 1 is the schematic appearance according to the display system 1 of first preferred embodiment of the present invention.Fig. 2 is that display system 1 among Fig. 1 is along the cross section view of the A-A line among Fig. 1.In all cross section views of this instructions, each element adds that especially skeleton view is to commend its architectural characteristic.
As shown in Figure 1, according to the display system 1 of first preferred embodiment of the present invention, itself defines horizontal direction H, normal direction N and vertical direction V.Normal direction N is perpendicular to display system 1, and vertical each other with horizontal direction H, vertical direction V respectively, and horizontal direction H is also vertical each other with vertical direction V.Display system 1 comprises frame (bezel) 11.Frame 11 its respective outer side edges are overlapped to the edge of display system 1, are fixed together in order to other element with display system 1.
As shown in Figure 2, comprise planar light source 10, prism thin plate 12, lens thin plate 14 and window shutter thin plate 16 according to the display system 1 of first preferred embodiment of the present invention.Explanation for ease, present embodiment is only explained with display system 1 inner member, so Fig. 2 does not show the frame 11 among Fig. 1.
Be shown in Fig. 2 equally, planar light source 10 has exiting surface 102.Prism thin plate 12 is arranged at exiting surface 102 tops of planar light source 10.Prism thin plate 12 comprises a plurality of strip micro-prism structures 122.The rough one-tenth of a plurality of strip micro-prism structure 122 along continuous straight runs H is arranged in parallel.That is to say that the longitudinal axis of each micro-prism structure 122 is rough parallel with the V direction.In detail; Rectangular micro-prism structure 122 is arranged along the first order direction, and in present embodiment, the first order direction is the horizontal direction sheet; As shown in Figure 2; Micro-prism structure 122 is arranged along horizontal direction H, and rectangular in twos micro-prism structure 122 can be and be arranged parallel to each other, but the present invention is not as limit.Rectangular micro-prism structure 122 extends along the second order direction, that is to say that in each bar micro-prism structure 122, the summit of micro-prism structure 122 can form an apex lines, and wherein apex lines is extended along the second order direction.In present embodiment, the second order direction is vertical direction V, and apex lines can be parallel to each other in twos, and right the present invention is not as limit.
In a specific embodiment, two micro-prism structures 122 that face mutually have spacing d in a plurality of micro-prism structures 122 of prism thin plate 12, and are as shown in Figure 2.The preferable example of the spacing d of two micro-prism structures 122 that face mutually is 50 microns; But the present invention is not as limit, and the big I of the spacing d between the micro-prism structure 122 is change to some extent according to the different designs demand, for example; When spacing d increases; Angular field of view can be increased, when spacing d reduces, the light harvesting effect can be increased.In present embodiment, each micro-prism structure 122 of prism thin plate 12 is the trapezoidal of non-homogeneous along the cross section of its longitudinal axis.That is to say that each micro-prism structure 122 is trapezoidal along the cross section of its longitudinal axis, its height or upper base width are not quite similar.In detail; Micro-prism structure 122 forms a cross section along parallel second order direction and vertical first order direction, and is as shown in Figure 2, and the cross section is by along being parallel to vertical direction V and being formed perpendicular to horizontal direction V; In other words, the cross section is by being formed along normal direction N.In present embodiment; The cross section of micro-prism structure 122 is trapezoidal; Promote by this micro-prism structure intensity, avoid micro-prism structure to collapse, increase covering property, and avoid display system 1 " unauspicious effect (Moir é effects) " of seeming in the corrugated picture or the like to occur.
In present embodiment, the cross section of micro-prism structure 122 can be similar trapezoidal of phase XOR in twos, for example; Trapezium structure can have identical bottom length in twos, but it is highly inequality, to form dissimilar structure; Or trapezium structure has identical bottom length and height ratio in twos; But it is highly inequality, and with the formation analog structure, but the present invention is not as limit.In addition, in same micro-prism structure 122, can have the cross section of a plurality of micro-prism structures 122, the formed trapezium structure in each cross section also has a similar structure of phase XOR with above-mentioned.
The foregoing description only describes in twos that micro-prism structure 122 can form the trapezoidal cross section structure of heterogencity under same cross-sectional, and is right; Among another embodiment; Same micro-prism structure 122 times, can have a plurality of cross sections that are parallel to each other, and form the trapezoidal cross section structure of heterogencity.
In present embodiment, the micro-prism structure that heterogencity is trapezoidal, can the dispersing prism thin plate 12 suffered pressure or gravity, to increase the intensity of micro-prism structure, can obtain suitable light harvesting simultaneously and spread all effects of tool, to take into account light-source brightness and wide viewing angle.In a specific embodiment; Each micro-prism structure 122 is trapezoidal when having identical base length along the cross section of its longitudinal axis; Its altitude range is 20 microns～22 microns; And trapezoidal upper base width range is 3 microns～5 microns to each micro-prism structure 122 along the cross section of its longitudinal axis, and wherein the longitudinal axis is along normal direction N, or the height of cross section trapezium structure and bottom width ratio are 40%～50%.
Be shown in Fig. 2 equally, lens thin plate 14 is arranged at prism thin plate 12 tops.Lens thin plate 14 comprises a plurality of microlens structures 142.In present embodiment; Microlens structure 142 is for having the grain pattern of curved surface, and wherein microlens structure 142 can be and has regular arrangement, for example; All have identical spacing in twos between the microlens structure 142, or microlens structure 142 is arranged according to the chess trellis.In another embodiment; Microlens structure 142 also can be erratic behavior and arranges; For example, have between the microlens structure 142 in twos that not distance, the microlens structure 142 of equidistance do not have that specific direction is arranged or the grain size of microlens structure 142 is different, as shown in Figure 2 in twos.
In a specific embodiment, when microlens structure 142 was arranged for erratic behavior, the distribution density of a plurality of microlens structures 142 of lens thin plate 14 (total area on the surface of all microlens structure area occupied/formation microlens structures) was about 65%～75%.The diameter of each microlens structure 142 is about 51 microns～65 microns.The hemisphere geometric proportion of each microlens structure 142 (diameter of the height/microlens structure of microlens structure) is about 40%～50%.The distribution density of a plurality of microlens structures 142 and physical dimension are in above-mentioned scope, and the mist degree of lens thin plate 14 (Haze) is about 84%.
The diagram of present embodiment only explains that with micro-prism structure 122 with identical trapezoid cross section and the microlens structure 142 with rule arrangement right, through from the above, the present invention is not as limit.In addition; The diagram of present embodiment is also only explained with microlens structure 142 corresponding micro-prism structures 122, but the present invention is not as limit, for example; Spacing between the microlens structure 142 can be different with the spacing between the micro-prism structure 122, or microlens structure 142 can be irregular arrangement.
Be shown in Fig. 2 equally, window shutter thin plate 16 is arranged at lens thin plate 14 tops.Fig. 2 illustrates the skeleton view of window shutter thin plate 16 especially, to commend its architectural characteristic.Window shutter thin plate 16 comprises the little shutter 162 of a plurality of strips.Vertically V is rough substantially is arranged in parallel for the little shutter 162 of a plurality of strips, and with the horizontal direction sheet at angle.Path or direction that a plurality of little blind window structures 162 are advanced in order to control light, it acts on similar light valve, grating.From planar light source 10 ejaculations and without appointing the light that closes the optical element adjustment, behind window shutter thin plate 16, the vertical rising angle scope of light is about 60 degree.The definition of vertical rising angle scope is a benchmark with the maximum briliancy of output light, and being center (visual angle is 0 degree) with the normal N extends to till the half the angle of maximum briliancy to vertical direction V.In present embodiment, the edge of horizontal direction H and window shutter thin plate 16 is parallel to each other.
In a specific embodiment; The bearing of trend of a plurality of little shutter 162 of window shutter thin plate 16 is direction L; And bearing of trend L and horizontal direction H have included angle, and suitable included angle can avoid display system 1 " unauspicious effect (Moir é effects) to occur.In the present embodiment, the included angle scope is extremely ± 10 degree of about 0 degree, further specifies; As shown in Figure 2, be benchmark with horizontal direction H, according to counterclockwise and L shaped to become the included angle scope be 0 degree to 10 degree with bearing of trend; Likewise, when included angle for being benchmark with horizontal direction H, be docile and obedient clockwise and when forming; This included angle scope is extremely-10 degree of 0 degree, so the included angle scope is that about 0 degree is to ± 10 degree.In present embodiment, as shown in Figure 2, rectangular micro-prism structure 122 extends along vertical direction V, and follows horizontal direction H to arrange, and little shutter 162 extends along the specific direction that has a certain degree with horizontal direction H.Therefore; The bearing of trend of little shutter 162 and micro-prism structure 122 is with near the orthogonal directions setting; Wherein, be to receive the influence that little shutter 162 and horizontal direction H have certain degree near orthogonal directions, and make skew is a little arranged with orthogonal directions.For example, when the included angle of little shutter 162 and horizontal direction H is 0 when spending, then little shutter 162 is vertical for each other with the bearing of trend of micro-prism structure 122, also is orthogonality relation.When the included angle of little shutter 162 and horizontal direction H is 10 when spending; Then little shutter 162 is spent for accompanying 80 degree or 100 with the bearing of trend of micro-prism structure 122; Therefore little shutter 162 accompanies an angle with 122 fens other bearing of trends of micro-prism structure, and in present embodiment, angular range is 80 to spend to 100 degree; Though be by little shutter for or micro-prism structure 122 be benchmark, and all can meet toward up time or counterclockwise angle.
As shown in Figure 2, light penetrates from the exiting surface 102 of planar light source 10, passes prism thin plate 12, lens thin plate 14 and window shutter thin plate 16.Arrow labeled is promptly represented light going direction among Fig. 2.Light is by prism thin plate 12, lens thin plate 14 and 16 adjustment of window shutter thin plate, and causes water is looked squarely angular region for being higher than 95 degree, and the vertical angle of view is for being higher than 20 degree.In present embodiment, the horizontal view angle scope be 95 the degree to 110 the degree, and the vertical angle of view scope be 20 the degree to 40 the degree.The definition of horizontal view angle range Theta is a benchmark with maximum briliancy, and being center (visual angle be 0 degree) with the normal N extends to till the half the angle of maximum briliancy to horizontal direction H.The definition of vertical angle of view scope α is a benchmark with maximum briliancy, and being center (visual angle be 0 degree) with the normal N extends to till the half the angle of maximum briliancy to vertical direction V.For example, the micro-prism structure 122 of regulation and control prism thin plate 12 similarly is the height ratio that increases the trapezoid cross section of micro-prism structure 122, with increase light harvesting effect, or reduces height ratio, to increase the range at visual angle.In addition, the bearing of trend of little shutter 162 of adjustment window shutter thin plate 16, the path of passing through with the adjustment light source, and then change visual angle or brightness.In addition, change the distribution density of the microlens structure 142 of lens thin plate 14, using increases the light harvesting effect, or the radius radian of adjustment microlens structure 142 distributes, and uses the width that changes the visual angle.
In a specific embodiment, as shown in Figure 2, a plurality of micro-prism structures 122 of prism thin plate 12 are towards planar light source 10, and a plurality of microlens structures 142 of lens thin plate 14 are towards window shutter thin plate 16.That is to say that micro-prism structure 122 and lenticule 142 are respectively towards relative direction.In present embodiment, micro-prism structure 122 is towards planar light source 10, and the last base that also is about to micro-prism structure 122 just is provided with down; At this moment; The light path of planar light source 10 receives the trapezoidal two hypotenuses influence of micro-prism structure 122, and toward the dual-side diffusion, to increase the range at visual angle.Simultaneously, utilize the microlens structure 142 that is provided with towards the top to compensate the light harvesting effect,, make wide viewing angle and high brightness all can have concurrently to increase brightness.
In another specific embodiment, as shown in Figure 3, a plurality of micro-prism structures 122 of prism thin plate 12 are towards lens thin plate 14, and a plurality of microlens structures 142 of lens thin plate 14 are towards prism thin plate 12.That is to say that micro-prism structure 122 is that face is relative with microlens structure 142, and respectively towards relative direction.In present embodiment, micro-prism structure 122 forms panel 18 towards image, and the last base that also is about to micro-prism structure 122 just is provided with up, and at this moment, the light path of planar light source 10 receives the trapezoidal influence of micro-prism structure 122, has light harvesting and diffusion effect.Arrow labeled is promptly represented light going direction among Fig. 3.Obvious ground, the form of the light path among Fig. 2 is different with light path form among Fig. 3.Have the element with Fig. 2 duplicate numbers mark among Fig. 3, identical or similar structure and function are arranged, seldom do at this and give unnecessary details.In another embodiment, Fig. 2 and display system 1 shown in Figure 3 are if the configuration led light source be fit to as traffic sign, but the present invention also can apply to automobile-used display not as limit.
Outward appearance according to the display system 1 of second preferred embodiment of the present invention is still as shown in Figure 1.See also Fig. 4, Fig. 4 illustrates according to the display system 1 of second preferred embodiment of the present invention cross section view along the A-A line among Fig. 1.
In another embodiment, display system 1 also comprises image and forms panel 18 and polaroid 182, shown in the 4th, 5 figure.Image forms panel 18 and is arranged at window shutter thin plate 16 tops, and in order to form image, for example, image forms panel 18 and can be liquid crystal panel, electrophoretic display device (EPD), electric slurry display panel or three-dimensional display etc.Fig. 4,5 has the element of duplicate numbers mark respectively with Fig. 2,3, identical or similar structure and function are arranged, and seldom does at this and gives unnecessary details.
In a specific embodiment, polaroid 182 is arranged at window shutter thin plate 16 tops, and in other words, polaroid 182 is arranged at window shutter thin plate 16 and image forms between the panel 18.In present embodiment, have distance s between polaroid 182 and the window shutter thin plate 16, utilize distance s to change the focal length on the visual field, and then eliminate the unauspicious effect of original generation.In the present embodiment, can utilize objects such as framework, separation material or pad to keep the distance s between polaroid 182 and the window shutter thin plate 16, to increase stability.
In another embodiment, polaroid 182 has atomizing, in order to reduce brightness irregularities; To reach the effect of brightness revisal, in other words, utilize polaroid 182 to be used for uniform luminance with atomizing effect; Avoid producing the phenomenon of local bright or local dark space; Wherein the mist degree of polaroid 182 is 20%～40%, and right, the present invention is not as limit.So, present embodiment is only explained with the polaroid 182 that is arranged at image formation panel 18 belows, but image forms the polaroid that panel 18 tops also can have mist degree.
In a specific embodiment, shown in the 4th, 5 figure, a plurality of light emitting diodes 106 that planar light source 10 comprises light-guide device 104 and is placed in M side edge of light-guide device 104, wherein M is 1,2 or 3.A plurality of light emitting diodes 106 are actuated to launch light and inject light-guide device 104, light and then by light-guide device 104 guiding prism thin plates 12.So, present embodiment only provides and utilizes side emitting combination of elements light-guide device that the formation planar light source is described, but is not limited thereto.In present embodiment, when multiple more optical diode 106 was arranged at the side edge of light-guide device 104, display system 1 its periphery all can promote with center brightness, can make that also the horizontal view angle scope is wide more simultaneously.
See also Fig. 6 and Fig. 7.Fig. 6 is when adopting identical side light type LED back light source, the liquid crystal display systems of the liquid crystal display systems of Fig. 4 framework, Fig. 5 framework and the liquid crystal display systems of preceding case one, and it is about the emulated data comparison diagram of horizontal direction briliancy.Fig. 7 then is these three kinds of liquid crystal display systemss, and it is about the emulated data comparison diagram of vertical direction briliancy.In this two figure, the definition of angular field of view is a benchmark with maximum briliancy, and being center (visual angle be 0 degree) with the normal N extends to till the half the angle of maximum briliancy to horizontal direction or vertical direction.
Can know from the data of Fig. 6 and to find out, the liquid crystal display systems of case one before adopting, its horizontal view angle scope is lower than about 95 degree.The liquid crystal display systems of case one is an example before adopting, and its horizontal view angle scope is about 92 degree.Adopt the liquid crystal display systems of Fig. 4 framework, its horizontal view angle scope then is about 104 degree.The horizontal view angle scope of liquid crystal display systems of adopting Fig. 5 framework is also wideer than the horizontal view angle scope of the liquid crystal display systems of adopting Fig. 4 framework, but the briliancy of adopting its centre visual angle of liquid crystal display systems of Fig. 5 framework obviously descends.The equal homogeneous of adopting its integral brightness of liquid crystal display systems of Fig. 4 framework is superior to adopting the equal homogeneous of its integral brightness of liquid crystal display systems of Fig. 5 framework.Its whole briliancy of liquid crystal display systems of adopting the liquid crystal display systems of Fig. 4 framework and adopting Fig. 5 framework is far above its integral brightness of liquid crystal display systems of case one before adopting.
Can know from the data of Fig. 7 and to find out, above-mentioned four kinds of liquid crystal display systemss, its vertical angle of view scope all can be limited in about 20 degree to 40 degree.
See also Fig. 8 and Fig. 9.Fig. 8 is when adopting identical side light type LED back light source, the liquid crystal display systems of the liquid crystal display systems of Fig. 4 framework and preceding case two, and it is about the emulated data comparison diagram of the relative briliancy of horizontal direction.Fig. 9 then is these two kinds of liquid crystal display systemss, and it is about the emulated data comparison diagram of the relative briliancy of vertical direction.In this two figure, to be center (visual angle be 0 degree) with the normal N extend to till the angle of relative briliancy 50% to horizontal direction or vertical direction in the definition of angular field of view.
Can know from the data of Fig. 8 and to find out, the liquid crystal display systems of case two before adopting, its horizontal view angle scope is lower than about 95 degree.The liquid crystal display systems of case two is an example before adopting, and it is 92 degree about horizontal view angle scope (θ 1).Adopt the liquid crystal display systems of Fig. 4 framework, its horizontal view angle scope (θ 2) then is about 104 degree.Can know from the data of Fig. 9 and to find out, the liquid crystal display systems of case two and the liquid crystal display systems of adopting Fig. 4 framework before adopting, its vertical angle of view scope all can be limited in about 20 degree to 40 degree.
Obvious ground greater than 95 degree, comes widely than the horizontal view angle scope of the display system of prior art according to its horizontal view angle scope of display system of the present invention.According to its vertical angle of view scope of display system of the present invention is that about 20 degree are to 40 degree.And, also come highly than the integral brightness of the display system of prior art according to its integral brightness of display system of the present invention.Because integral brightness improves; Make under the framework of present embodiment; Can reach wide viewing angle and the effect that keeps brightness via regulation and control prism thin plate 12, lens thin plate 14 and window shutter thin plate 16; Do not need to increase especially the usage quantity of backlight or increase its brightness, therefore also can reach quantity or the energy of saving backlight.
In a simulation case, adopt the liquid crystal display systems of Fig. 4 framework and do comparison with the liquid crystal display systems of adopting prior art.This two liquid crystal display systems adopts identical 6.5 o'clock size display panels and side light type LED back light source.If center (visual angle is 0 degree) briliancy requires 3458nits (cd/m
2), the liquid crystal display systems of adopting prior art needs 116 light emitting diodes, and the liquid crystal display systems of adopting Fig. 4 framework only needs 32 light emitting diodes.Significantly, compare with prior art, liquid crystal display systems power consumption according to the present invention is lower, does not also have problems such as operation temperature rising.
Through the detailed description of above preferred embodiment, hope can be known description characteristic of the present invention and spirit more, and is not to come category of the present invention is limited with the above-mentioned preferred embodiment that is disclosed.On the contrary, its objective is that hope can contain in the category of claim of being arranged in of various changes and tool equality institute of the present invention desire application.Therefore, the category of the claim that the present invention applied for should be done the broadest explanation according to above-mentioned explanation, contains the arrangement of all possible change and tool equality to cause it.
Claims (13)
1. a display system itself defines a horizontal direction and a vertical direction, it is characterized in that this display system comprises:
One planar light source has an exiting surface;
One prism thin plate is arranged at this exiting surface top of this planar light source, and comprises a plurality of strip micro-prism structures, and these a plurality of strip micro-prism structures are arranged along this horizontal direction parallel;
One lens thin plate is arranged at this prism thin plate top, and comprises a plurality of microlens structures;
One window shutter thin plate is arranged at this lens thin plate top, and comprises the little shutter of a plurality of strips, the little shutter of these a plurality of strips substantially along this vertical direction be arranged in parallel and with this horizontal direction at angle; And
One image forms panel, is arranged at this window shutter thin plate top;
Wherein a light penetrates from this exiting surface of this planar light source; Pass this prism thin plate, this lens thin plate and this window shutter thin plate and form panel and advance towards this image; And by this prism thin plate, this lens thin plate and the adjustment of this window shutter thin plate; Cause a horizontal view angle scope to be spent, and a vertical angle of view scope is for being higher than 20 degree for being higher than 95.
2. display system according to claim 1 is characterized in that, these a plurality of little shutters and this horizontal direction angulation scope are that about 0 degree is to ± 10 degree.
3. display system according to claim 2 is characterized in that, a plurality of microlens structures of this of this lens thin plate are irregular arrangement.
4. display system according to claim 3 is characterized in that, further comprises a polaroid, and this polaroid is arranged at this window shutter thin plate and this image and forms between the panel, and and this window shutter thin plate between have spacing.
5. display system according to claim 1 is characterized in that, two micro-prism structures that face mutually have spacing in these a plurality of micro-prism structures, and these a plurality of micro-prism structures are the trapezoidal of non-homogeneous along the cross section of its longitudinal axis.
6. display system according to claim 1 is characterized in that, these a plurality of micro-prism structures are towards this planar light source, and these a plurality of microlens structures are towards this window shutter thin plate.
7. display system according to claim 6 is characterized in that, these a plurality of micro-prism structures are towards this lens thin plate, and these a plurality of microlens structures are towards this prism thin plate.
8. a display system is characterized in that, this display system comprises:
One planar light source;
One prism thin plate has a plurality of strip micro-prism structures, and is arranged at this planar light source top;
One lens thin plate is arranged at this prism thin plate top, and is positioned at a side of this planar light source relatively, and this lens thin plate has a plurality of microlens structures; And
One window shutter thin plate has the little shutter of a plurality of strips, is arranged at this lens thin plate top, and is positioned at a side of this prism thin plate relatively;
Wherein each micro-prism structure is the trapezoidal of non-homogeneous along the cross section of its longitudinal axis.
9. display system according to claim 8; It is characterized in that; These a plurality of micro-prism structures are arranged in parallel along a first order direction; The a plurality of little shutters of this of this window shutter thin plate are arranged in parallel along a second order direction, and this second order direction is that about 0 degree is to ± 10 degree with a horizontal direction angulation scope perpendicular to this first order direction.
10. display system according to claim 8 is characterized in that, a plurality of microlens structures of this of this lens thin plate are irregular arrangement.
11. display system according to claim 8 is characterized in that, a plurality of micro-prism structures of this of this prism thin plate are towards this planar light source, and these a plurality of microlens structures of this lens thin plate are towards this window shutter thin plate.
12. display system according to claim 8 is characterized in that, a plurality of micro-prism structures of this of this prism thin plate are towards this lens thin plate, and these a plurality of microlens structures of this lens thin plate are towards this prism thin plate.
13. display system according to claim 12 is characterized in that, further comprises a polaroid, this polaroid is arranged at this window shutter thin plate top, and has a spacing between this polaroid and this window shutter thin plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100117087A TWI430221B (en) | 2011-05-16 | 2011-05-16 | Display system with wide horizontal viewing range and narrow vertical viewing range |
| TW100117087 | 2011-05-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102323690A true CN102323690A (en) | 2012-01-18 |
| CN102323690B CN102323690B (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110266311.9A Expired - Fee Related CN102323690B (en) | 2011-05-16 | 2011-09-05 | Display system with wide horizontal viewing angle range and narrow vertical viewing angle range |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102323690B (en) |
| TW (1) | TWI430221B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018129068A1 (en) * | 2017-01-04 | 2018-07-12 | 3M Innovative Properties Company | Light control film with turning film and lenticular diffuser for view enhancement in the horizontal plane |
| CN110648587A (en) * | 2019-09-27 | 2020-01-03 | 维沃移动通信有限公司 | Display module and electronic equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346068A (en) * | 2000-08-07 | 2002-04-24 | 夏普株式会社 | Background light and LCD |
| CN1820165A (en) * | 2003-08-13 | 2006-08-16 | 富士通株式会社 | Illuminating device and LCD unit |
| CN1993582A (en) * | 2004-08-06 | 2007-07-04 | 可乐丽股份有限公司 | Light guide plate, production method therefor, and surface light source device with the same |
| CN101082406A (en) * | 2006-06-02 | 2007-12-05 | 索尼株式会社 | Backlight device, liquid crystal display device, and electronic apparatus using liquid crystal display device |
| KR20090060067A (en) * | 2007-12-07 | 2009-06-11 | 엘지디스플레이 주식회사 | Diffuser plate and backlight unit for lcd including the same |
| CN101743508A (en) * | 2007-06-12 | 2010-06-16 | 第一毛织株式会社 | Light guide panel comprising symmetric front prism and asymmetric front prism for back light unit of LCD |
-
2011
- 2011-05-16 TW TW100117087A patent/TWI430221B/en not_active IP Right Cessation
- 2011-09-05 CN CN201110266311.9A patent/CN102323690B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1346068A (en) * | 2000-08-07 | 2002-04-24 | 夏普株式会社 | Background light and LCD |
| CN1820165A (en) * | 2003-08-13 | 2006-08-16 | 富士通株式会社 | Illuminating device and LCD unit |
| CN1993582A (en) * | 2004-08-06 | 2007-07-04 | 可乐丽股份有限公司 | Light guide plate, production method therefor, and surface light source device with the same |
| CN101082406A (en) * | 2006-06-02 | 2007-12-05 | 索尼株式会社 | Backlight device, liquid crystal display device, and electronic apparatus using liquid crystal display device |
| CN101743508A (en) * | 2007-06-12 | 2010-06-16 | 第一毛织株式会社 | Light guide panel comprising symmetric front prism and asymmetric front prism for back light unit of LCD |
| KR20090060067A (en) * | 2007-12-07 | 2009-06-11 | 엘지디스플레이 주식회사 | Diffuser plate and backlight unit for lcd including the same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018129068A1 (en) * | 2017-01-04 | 2018-07-12 | 3M Innovative Properties Company | Light control film with turning film and lenticular diffuser for view enhancement in the horizontal plane |
| CN110268311A (en) * | 2017-01-04 | 2019-09-20 | 3M创新有限公司 | For enhancing the light control film with turning film and the even mating plate of lenticular of view in a horizontal plane |
| US11099314B2 (en) | 2017-01-04 | 2021-08-24 | 3M Innovative Properties Company | Light control film with turning film and lenticular diffuser for view enhancement in the horizontal plane |
| CN110648587A (en) * | 2019-09-27 | 2020-01-03 | 维沃移动通信有限公司 | Display module and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102323690B (en) | 2014-10-29 |
| TW201248577A (en) | 2012-12-01 |
| TWI430221B (en) | 2014-03-11 |
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