CN102819142A - Display device - Google Patents
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- CN102819142A CN102819142A CN2012102734424A CN201210273442A CN102819142A CN 102819142 A CN102819142 A CN 102819142A CN 2012102734424 A CN2012102734424 A CN 2012102734424A CN 201210273442 A CN201210273442 A CN 201210273442A CN 102819142 A CN102819142 A CN 102819142A
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- blooming
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Abstract
The invention relates to a display device, which comprises a light source module, a display module, a guide optical film, a first compensation film and a second compensation film. The light source module has directional light. The display module is arranged above the light source module. The display module comprises a first substrate, a second substrate and a display medium. The first substrate has a first inner surface and a first outer surface. The guide optical film is located on the second outer surface of the second substrate of the display module and has a light incident surface and a light emitting surface, the directional light enters the guide optical film from the light incident surface and is emitted from the light emitting surface to form an emitted light, and an included angle is formed between the emitted light and the light emitting surface. The first compensation film is located on the first outer surface of the first substrate. The second compensation film is positioned between the second substrate and the guide optical film. The invention solves the problems of low penetration rate and high driving voltage when the blue phase liquid crystal is applied to an IPS display module in the prior art.
Description
Technical field
The invention relates to a kind of display device, and particularly relevant for a kind of liquid crystal indicator.
Background technology
Along with showing the flourish of science and technology, consumption popular for the display image display quality require increasingly high.Consumption is popular except the specification to the resolution (resolution) of display, contrast (contrast ratio), visual angle (viewing angle), gray-scale inversion (grey level inversion), color saturation (color saturation) requires to some extent, and the specification requirement in reaction time (response time) of display is also day by day improved.
For demand in response to the consumption masses, the numerous and confused exploitation that drops into blue phase (blue phase) LCD of the relevant dealer of display with rapid answer characteristic.With blue phase (blue phase) liquid crystal material is example, generally needs transverse electric field to operate so that it has the function of light valve.The someone adopts the electrode design of coplane conversion IPS (In-Plane Switching) display module to drive the blue phase liquid crystal molecule in blue phase (blue phase) LCD at present.
Yet in the electrode design of typical IPS display module, its electrode top has many zones not have transverse electric field, and makes have in the blue phase liquid crystal display many liquid crystal molecules can't be by smooth driving, and then causes the penetrance of display module on the low side.If improve driving voltage for the penetrance that improves the IPS display module, though penetrance is promoted, the problem of being derived is exactly too power consumption.Therefore, how to improve low penetration rate and the problem of high driving voltage in the blue phase liquid crystal display, real be the problem of developer institute desire solution.In addition, the contrast ratio of blue phase (blue phase) LCD and visual angle still need further to promote.
Summary of the invention
The present invention provides a kind of display device, the problem of existing low penetration rate and high driving voltage when it can solve tradition blue phase liquid crystal is applied to the IPS display module.
The present invention proposes a kind of display device, and it comprises light source module, display module, guiding blooming, first compensate film and second compensate film.Light source module has directive property light.Display module is arranged on the light source module top, and this display module comprises first substrate, second substrate and display medium.First substrate has first inside surface and first outside surface.Second substrate is positioned at the subtend of first substrate and has second inside surface and second outside surface.Display medium is between first substrate and second substrate; Wherein display medium has tropisms such as optics (optically isotropic); And display medium has optical anisotropy (optically anisotropic) when receiving electric field driven, and directive property light is when getting into display module, and directive property light is not orthogonal to first outside surface; And directive property light is when penetrating display module, and directive property light is not orthogonal to second outside surface.The guiding blooming is positioned on second outside surface of second substrate of display module and has incidence surface and exiting surface; Directive property light gets into the guiding blooming and penetrates light from the exiting surface ejaculation to form from incidence surface, wherein penetrates between light and exiting surface to have angle.First compensate film is positioned on first outside surface of first substrate.Second compensate film is between second substrate and guiding blooming.
The present invention is in the last polaroid of display device and between the polaroid compensate film is set down.Compensate film the polarization state that can adjust the directive property light that is incident in the display module is set, make the polarization state of directive property light meet the direction of the absorption axes of polaroid.Thus, can reduce the generation of light leakage phenomena, with contrast ratio that improves display device and the visual angle that increases display device.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and cooperates appended graphic elaborating as follows.
Description of drawings
Fig. 1 is the diagrammatic cross-section of display device according to an embodiment of the invention;
Fig. 2 A is that display medium is the iso synoptic diagram of optics under no current field condition;
Fig. 2 B is that display medium has optically anisotropic synoptic diagram in electric field is arranged;
Fig. 3 A and Fig. 3 B are the diagrammatic cross-sections of display device according to an embodiment of the invention;
Fig. 4 A is the diagrammatic cross-section of first blooming in the display device according to an embodiment of the invention;
Fig. 4 B is the schematic perspective view of first blooming of Fig. 4 A;
Fig. 5 A is the diagrammatic cross-section of second blooming in the display device according to an embodiment of the invention;
Fig. 5 B is the schematic perspective view of second blooming of Fig. 5 A;
Fig. 6 A is the diagrammatic cross-section of the blooming in the display device according to an embodiment of the invention;
Fig. 6 B is the schematic perspective view of the blooming of Fig. 6 A;
Fig. 7 be according to an embodiment of the invention light in the index path through first blooming, second blooming and blooming;
Fig. 8 A is the diagrammatic cross-section of the blooming in the display device according to another embodiment of the present invention;
Fig. 8 B is the schematic perspective view of the blooming of Fig. 8 A;
Fig. 9 A is the diagrammatic cross-section according to the blooming in the display device of further embodiment of this invention;
Fig. 9 B is the schematic perspective view of the blooming of Fig. 9 A;
Figure 10 A is the diagrammatic cross-section according to the blooming in the display device of further embodiment of this invention;
Figure 10 B is the schematic perspective view of the blooming of Figure 10 A;
Figure 11 and Figure 12 are the diagrammatic cross-sections of the display device of several embodiment according to the present invention;
Figure 13 is with the voltage of the transverse electric field driving blue phase liquid crystal of Traditional IP S display module and the graph of a relation of penetration;
Figure 14 A and Figure 14 B are with the voltage of the vertical electric field driving blue phase liquid crystal of display device of the present invention and the graph of a relation of light angle;
Figure 15 is with the voltage of the transverse electric field driving blue phase liquid crystal of Traditional IP S display module and the graph of a relation of penetration;
Figure 16 is with the voltage of the vertical electric field driving blue phase liquid crystal of display device of the present invention and the graph of a relation of penetration;
Figure 17 is the measurement result that drives the hysteresis phenomenon of blue phase liquid crystal with the transverse electric field of Traditional IP S display module;
Figure 18 is the measurement result that drives the hysteresis phenomenon of blue phase liquid crystal with the vertical electric field of display device of the present invention;
Figure 19 is the display medium thickness of display device of the present invention and the graph of a relation between the voltage;
Figure 20 be display device of the present invention under the thickness condition of different display mediums, the graph of a relation between its voltage and the penetrance;
Figure 21 is the diagrammatic cross-section according to the display device of first embodiment of the invention;
Figure 22 is the schematic perspective view according to light source module in the display device of the present invention and display module;
Figure 23 is the Poincare sphere synoptic diagram according to the display device using compensation film of the first embodiment of the invention compensation process when the dark attitude;
Figure 24 is the contrast ratio contour map that the display device of Figure 21 is surveyed according to table one parameter setting;
Figure 25 is the contrast ratio contour map that the display device of Figure 21 is surveyed according to table two parameter setting;
Figure 26 is the contrast ratio contour map that the display device of Figure 21 is surveyed according to table three parameter setting;
Figure 27 is the contrast ratio contour map that the display device of Figure 21 is surveyed according to table four parameter setting;
Figure 28 is that the display device of Figure 21 is set the contrast ratio contour map of being surveyed according to table Wucan number;
Figure 29 is the contrast ratio contour map that the display device of Figure 21 is surveyed according to table six parameter setting;
Figure 30 is the diagrammatic cross-section according to the display device of second embodiment of the invention;
Figure 31 is the Poincare sphere synoptic diagram according to the display device using compensation film of the second embodiment of the invention compensation process when the dark attitude;
Figure 32 is the contrast ratio contour map that the display device of Figure 30 is surveyed according to table seven parameter setting;
Figure 33 is the diagrammatic cross-section according to the display device of third embodiment of the invention;
Figure 34 is the Poincare sphere synoptic diagram according to the display device using compensation film of the third embodiment of the invention compensation process when the dark attitude;
Figure 35 is the contrast ratio contour map that the display device of Figure 33 is surveyed according to table eight parameter setting;
Figure 36 is the contrast ratio contour map that the display device of Figure 33 is surveyed according to table nine parameter setting;
Figure 37 is the diagrammatic cross-section according to the display device of fourth embodiment of the invention;
Figure 38 is the Poincare sphere synoptic diagram according to the display device using compensation film of the fourth embodiment of the invention compensation process when the dark attitude;
Figure 39 is the contrast ratio contour map that the display device of Figure 37 is surveyed according to table ten parameter setting;
Figure 40 is the diagrammatic cross-section according to the display device of fifth embodiment of the invention;
Figure 41 is the Poincare sphere synoptic diagram according to the display device using compensation film of the fifth embodiment of the invention compensation process when the dark attitude;
Figure 42 is the contrast ratio contour map that the display device of Figure 40 is surveyed according to table ten parameter setting;
Figure 43 is the contour map of the bright attitude surveyed according to table ten parameter setting of the display device of Figure 40;
Figure 44 is the Poincare sphere synoptic diagram according to the display device using compensation film of the fifth embodiment of the invention compensation process when the dark attitude;
Figure 45 is the contrast ratio contour map that the display device of Figure 40 is surveyed according to table ten two parameter settings;
Figure 46 is the contour map of the bright attitude surveyed according to table ten two parameter settings of the display device of Figure 40;
Figure 47 is the diagrammatic cross-section according to the display device of sixth embodiment of the invention;
Figure 48 is the Poincare sphere synoptic diagram according to the display device using compensation film of the sixth embodiment of the invention compensation process when the dark attitude;
Figure 49 is the contrast ratio contour map that the display device of Figure 47 is surveyed according to table ten three parameter settings;
Figure 50 is the contour map of the bright attitude surveyed according to table ten three parameter settings of the display device of Figure 47;
Figure 51 is the diagrammatic cross-section according to the display device of seventh embodiment of the invention;
Figure 52 is the Poincare sphere synoptic diagram according to the display device using compensation film of the seventh embodiment of the invention compensation process when the dark attitude;
Figure 53 is the contrast ratio contour map that the display device of Figure 51 is surveyed according to table ten four parameter settings;
Figure 54 is the contour map of the bright attitude surveyed according to table ten four parameter settings of the display device of Figure 51.
Wherein, Reference numeral:
100: display device
P: display module
B: light source module
201: vertical electric field
21b: first substrate
22b, 221b: pel array
231: compensate film
24b: first blooming
23b: following polaroid
26a: LGP
26b: light source
20: display medium
21a: second substrate
22a, 221a: counter electrode
24a: second blooming
25: blooming
23a: go up polaroid
27: diffusion barrier
29: eyes
281,282: directive property light
283: penetrate light
31a: the 4th compensate film
31a-1:A plate compensate film
31a-2:C plate compensate film
31b: the 3rd compensate film
V: vertical axis
D: thickness
D1, D2, D3, D4, D5 ~ D8: direction
S1 ~ S10: surface
θ, θ 1, θ 1 ', θ 2, θ 3～θ 8: angle
Ψ: polarization angle
Φ: orientation angle
W1 ~ W6, W5 ', W5 ' ', W5-1, W5-2, W6 ': sidewall
T1～T3, T3 ': optical texture
P1～p4: recess width
X, Y, Z: direction
60,80: the orientation slit pattern
70: the orientation projection pattern
Embodiment
Describe the present invention below in conjunction with accompanying drawing and specific embodiment, but not as to qualification of the present invention.
Fig. 1 is the diagrammatic cross-section of display device according to an embodiment of the invention.Please with reference to Fig. 1, the display device 100 of present embodiment comprises display module P, light source module B and guiding blooming 25.
Display module P comprises the first substrate 21b, the second substrate 21a and display medium 20.
The first substrate 21b has inside surface S1 and outside surface S2, and the inside surface S1 of the first substrate 21b is provided with pel array 22b.The material of the first substrate 21b can be glass, quartz, organic polymer or other material applicatory.According to present embodiment; Pel array 22b comprises multi-strip scanning line, many data lines and a plurality of pixel cell; Wherein each pixel cell comprises active member and the pixel electrode that electrically connects with active member, and the active member of pixel cell electrically connects with a corresponding data line and a corresponding sweep trace.Above-mentioned active member can be bottom grid film electric crystal or top grid type membrane transistor.
The second substrate 21a is positioned at the subtend of the first substrate 21b, and the second substrate 21a has inside surface S3 and outside surface S4, and the inside surface S3 of the second substrate 21a is provided with counter electrode 22a.Similarly, the material of the second substrate 21a can be glass, quartz, organic polymer or other material applicatory.Counter electrode 22a is the inside surface S3 that covers the second substrate 21a all sidedly.According to present embodiment; Counter electrode 22a is a transparency electrode; Its material comprises metal oxide, and it for example is indium tin oxide, indium-zinc oxide, aluminium tin-oxide, aluminium zinc oxide, indium germanium zinc oxide or other suitable metal oxide or the above-mentioned stack layer of the two at least.
What deserves to be mentioned is, on the above-mentioned first substrate 21b or the second substrate 21a, also colour filter array can be set further, but so that display module P display color image.So, the invention is not restricted to this.
Display medium 20 is between the counter electrode 22a of the pel array 22b of the first substrate 21b and the second substrate 21a.Particularly, said display medium 20 has optics etc. to character (optically isotropic), shown in Fig. 2 A under the environment of no electric field.When display medium 20 then has optical anisotropy's matter (optically anisotropic) under the environment that vertical electric field 201 is arranged, shown in Fig. 2 B.In other words, when no electric field between pel array 22b and the counter electrode 22a produced, display medium 20 was to present optics etc. to character.When being formed with vertical electric field 201 between pel array 22b and the counter electrode 22a, display medium 20 is to present optical anisotropy's matter.According to present embodiment; Above-mentioned display medium 20 comprises blue phase liquid crystal, and it for example is that polymer stabilizing type blue phase liquid crystal (polymer-stabilized blue phase liquid crystals) or polymer stabilizing type etc. are to phase liquid crystal (polymer-stabilized isotropic phase liquid crystals) or the like.Because display medium 20 is the formation through electric field display medium 20 is changed between tropism such as optics and optical anisotropy; So that the effect of display medium 20 performance light valves, so the reaction velocity of this kind display medium 20 will go up many compared to the torque response speed of traditional nematic crystal molecule soon.
Light source module B is arranged on the below of outside surface S2 of the first substrate 21b of display module P; It produces directive property light 281, and wherein directive property light 281 refers to have specific light projector direction and the specific beam angle of light, and directive property light 281 only concentrates in the specific scope in the present embodiment; That is has a directivity; And non-traditional general scattering property light source, its light is to four sides diffusion, the not any directivity of tool.Above-mentioned light source module B for example is a side incident type light source module, and it comprises LGP 26a and light source 26b.Certainly, light source module B also can further comprise optical diaphragm group, framework or the like element.The light source module B of present embodiment is to be that example is explained with side incident type light source module, so the invention is not restricted to this, and according to other embodiment, light source module B can also be the light source module of other kinds form, for example is the directly-down light source module.
Hold the above, because display medium 20 has optical anisotropy's matter when the environment of electric field is arranged.Therefore; When between the pel array 22b of display module P and counter electrode 22a, forming vertical electric field 201; Display medium 20 is except presenting optical anisotropy's matter, and display medium 20 also can present vertical type along vertical electric field 201 to be arranged, shown in Fig. 1 and Fig. 2 B.For optical anisotropy's display medium 20 that vertical type is arranged has birefringence for the light from light source module B, present embodiment has been done special design to the direction of transfer of the light of light source module B, is described below.
According to present embodiment, the directive property light 281 that light source module B is produced has incident direction D1 when injecting display module P, and incident direction D1 is not vertical each other each other with the outside surface S2 of the first substrate 21b.In other words, the directive property light 281 that light source module B is produced not is vertically to inject among the display module P, but injects among the display module P with specific angle of inclination.The directive property light 281 that light source module B is produced penetrates light source module B with specific angle of inclination; Can design special optical microstructures through going up, or the blooming piece that one deck has special optical microstructures is set on LGP 26a in LGP 26a.Thus, just can make light that light source 26b produced in the time, can make the direction of transfer of light produce and change, to reach the purpose that directive property light 281 that light source module B is produced penetrates with specific angle of inclination through LGP 26a (or blooming piece).According to present embodiment, because the directive property light 281 that light source module B is produced is to penetrate with specific angle of inclination, so the angle theta 1 between the outside surface S2 of the incident direction D1 of directive property light 281 and the first substrate 21b for example is 5 degree～45 degree.In other words, the tilt angle theta 1 ' of the directive property light 281 that produced of light source module B for example is 45 degree～85 degree.Described tilt angle theta 1 ' refers to the incident direction D1 of directive property light 281 and the angle between the vertical axis V.
Hold the above, after directive property light 281 is injected display module P with tilt angle theta 1 ', just formed directive property light 282, and the directive property light 282 in display module P is still kept identical direction and advanced to run through display medium 20.In other words, the directive property light 281 that light source module B is produced is directive property light 282 when injecting display medium 20, and directive property light 282 has incident direction D2, and incident direction D2 is not vertical each other each other with the inside surface S1 of the first substrate 21b.Therefore, the angle theta between the inside surface S1 of the incident direction D2 of directive property light 282 and the first substrate 21b is not equal to 90 degree.According to present embodiment, the angle theta between the inside surface S1 of the incident direction D2 of directive property light 282 and the first substrate 21b for example is 5 degree～45 degree.
Afterwards; When directive property light 282 in through display medium 20 and after passing the second substrate 21a; Directive property light 282 can be directed to blooming 25 and be directed to the ejaculation light 283 with ejaculation direction D3, and the surface (outgoing plane) of said ejaculation direction D3 and guiding blooming 25 accompanies the angle of 60 degree to 120 degree in fact.In the present embodiment, penetrating light 283 is vertically to penetrate guiding blooming 25, and surface (outgoing plane) essence that therefore penetrates direction D3 and guiding blooming 25 is the angle of 90 degree, so that the ejaculation light that user's eyes 29 receive 283 is forward light.So, because the angle theta 2 between the surface (outgoing plane) of the ejaculation direction D3 of ejaculation light 283 and guiding blooming 25 equals 90 degree in fact.
In the present embodiment, before getting into display medium 20, keep identical advancing/direction of transfer as far as possible, the first blooming 24b can further be set on the outside surface S2 of the first substrate 21b in order to make directive property light 281.In addition, after leaving display medium 20, keep identical advancing/direction of transfer as far as possible, the second blooming 24a can further be set on the outside surface S4 of the second substrate 21b in order to make directive property light 282.
Please be simultaneously with reference to Fig. 1 and Fig. 4 A, Fig. 4 B, the first blooming 24b is arranged on the outside surface S2 of the first substrate 21b.Particularly; The first blooming 24b has a plurality of first optical texture T1; And the first optical texture T1 can make directive property light 281 in through the time do not produce total reflection in fact, that is directive property light 281 is directly to penetrate when the first optical texture T1 through the first blooming 24b.If directive property light 281 is directly to penetrate and do not produce total reflection or other refractions when the first optical texture T1 through the first blooming 24b; The first blooming 24b can minimize for the consume of directive property light 281 so, that is avoids directive property light 281 to consume the interface at the air and the first substrate 21b because of reflection.So directive property light 281 just can pass through the first blooming 24b with identical direction of transfer as much as possible.
According to present embodiment; The first blooming 24b has first surface S5 and with respect to the second surface S6 of first surface S5; First surface S5 is towards light source module B, and second surface S6 is the outside surface S2 towards the first substrate 21b, and the first optical texture T1 is positioned on the first surface S5.In other words, the second surface S6 of the first blooming 24b of present embodiment is smooth plane, but the invention is not restricted to this.In addition, the first optical texture T1 on the first surface S5 of the first blooming 24b can make the directive property light 281 of light source module B directly penetrate the first blooming 24b as much as possible.
According to present embodiment, the first above-mentioned optical texture T1 is a groove structure, and it has the first side wall W1 and the second sidewall W2, shown in Fig. 4 A.Directive property light 281 in through the first blooming 24b time to go into directive direction D1 vertical in fact with the first side wall W1, and it is parallel in fact with the second sidewall W2 to go into directive direction D1.More detailed, in first optical texture (groove structure) T1 of present embodiment, the first side wall W1 of groove structure T1 be long sidewall for short sidewall and the second sidewall W2, and lack sidewall W1 and directive property light 281 to go into directive direction D1 vertical in fact.In addition, the refractive index of the refractive index of the first blooming 24b and the first substrate 21b is close.Thus; Directive property light 281 is in through first optical texture (groove structure) T1 the time; Directive property light 281 can directly penetrate and not produce total reflection or refraction in short sidewall W1, so that directive property light 281 can directly penetrate the first blooming 24b as much as possible.In the present embodiment, the recess width p1 of first optical texture (groove structure) T1 is about 5 microns～100 microns.Angle theta 4 is about 5 degree～45 degree between the first side wall W1 of first optical texture (groove structure) T1 and the vertical axis V.Angle theta 3 is about 45 degree～85 degree between the second sidewall W2 of first optical texture (groove structure) T1 and the vertical axis V.
Then, please be simultaneously with reference to Fig. 1 and Fig. 5 A, Fig. 5 B, the second blooming 24a is arranged on the outside surface S4 of the second substrate 21a.Particularly; The second blooming 24a has a plurality of second optical texture T2; And the second optical texture T2 can make directive property light 282 in through the time do not produce total reflection in fact, that is directive property light 282 is directly to penetrate when the second optical texture T2 through the second blooming 24a.If directive property light 282 is directly to penetrate and do not produce total reflection when the second optical texture T2 through the second blooming 24a; The second blooming 24a can minimize for the consume of directive property light 282 so, that is avoids directive property light 282 to consume the interface at the air and the second blooming 24a because of reflection.So directive property light 282 just can penetrate the second blooming 24a with identical direction of transfer as much as possible.
According to present embodiment, the second blooming 24a has first surface S7 and with respect to the second surface S8 of first surface S7, first surface S7 is the outside surface S4 towards the second substrate 21a, and the second optical texture T2 is positioned on the second surface S8.In other words, the first surface S7 of the second blooming 24a is smooth plane, but the invention is not restricted to this.And the second optical texture T2 on the second surface S8 of the second blooming 24a can make directive property light 282 directly penetrate the second blooming 24a as much as possible.
According to present embodiment, the second above-mentioned optical texture T2 is a groove structure, and it has the first side wall W3 and the second sidewall W4, shown in Fig. 5 A.Directive property light 282 in through the second blooming 24a time to go into directive direction D2 vertical with the first side wall W3, and the 3rd to go into directive direction D2 parallel with the second sidewall W4.More detailed, in second optical texture (groove structure) T2 of present embodiment, the first side wall W3 be long sidewall for short sidewall and the second sidewall W4, and lack sidewall W3 and directive property light 282 to go into directive direction D2 vertical in fact.In addition, the refractive index of the refractive index of the second blooming 24a and the second substrate 21a is close.Thus, directive property light 282 is in when second optical texture (groove structure) T2, and directive property light 282 can directly penetrate and do not produce total reflection or refraction in short sidewall W3, so that directive property light 282 directly penetrates the second blooming 24a as much as possible.In the present embodiment, the recess width p2 of second optical texture (groove structure) T2 is about 5 microns～100 microns.Angle theta 6 is about 5 degree～45 degree between the first side wall W3 of second optical texture (groove structure) T2 and the vertical axis V.Angle theta 5 is about 45 degree～85 degree between the second sidewall W4 of second optical texture (groove structure) T2 and the vertical axis V.
Afterwards, please be simultaneously with reference to Fig. 1 and Fig. 6 A, Fig. 6 B, guiding blooming 25 is arranged on the second blooming 24a.Guiding blooming 25 has a plurality of guiding optical texture T3; And guiding optical texture T3 can make said directive property light 282 on guiding optical texture T3, produce total reflection in fact and form and penetrate light 283, has 60～120 angles of spending between surface (outgoing plane) S10 of the ejaculation direction D3 of light 283 after passing guiding blooming 25 and the blooming 25 that leads so that penetrate.In the present embodiment, it is mutual vertical in fact penetrating between surface (outgoing plane) S10 of the ejaculation direction D3 of light 283 after passing guiding blooming 25 and the blooming 25 that leads.In other words, directive property light 282 is to produce total reflection as much as possible and form and penetrate light 283 on the guiding optical texture T3 of guiding blooming 25.In other words, the design of the guiding optical texture T3 of guiding blooming 25 mainly is will be with the directive property light 281,282 that penetrates from light source module B its transmission/working direction of correcting after passing through guiding blooming 25.So just, can make ejaculation light 283 can vertically penetrate guiding blooming 25, so that user's eyes 20 receive.
According to present embodiment; Guiding blooming 25 has first surface S9 (be referred to as not only incidence surface) and with respect to the second surface S10 (but also can be described as exiting surface) of first surface S9; First surface S9 is the outside surface S4 towards the second substrate 21a, and guiding optical texture T3 is positioned on the first surface S9.In other words, the second surface S10 of guiding blooming 25 is smooth planes, but the invention is not restricted to this.And the guiding optical texture T3 on the first surface S9 of guiding blooming 25 can make directive property light 282 produce total reflection as much as possible to form ejaculation light 283.
According to present embodiment, guiding optical texture T3 is a groove structure, and it has the first side wall W5 and the second sidewall W6, shown in Fig. 6 A.In the present embodiment, the first side wall W5 of groove structure T3 and the second sidewall W6 are all flat sidewall.More detailed, in optical texture (groove structure) T3 of present embodiment, angle theta 7 is about 5 degree～60 degree between the first side wall W5 and the vertical axis V, and angle theta 8 is about 15 degree～45 degree between the second sidewall W6 and the vertical axis V.Therefore, when directive property light 282 was incident upon blooming piece 25, directive property light 282 can produce total reflection and penetrate light 283 to form in the first side wall W5 of guiding optical texture T3, and makes that penetrating light 283 can vertically penetrate guiding blooming 25.In addition, in the present embodiment, the recess width p3 of optical texture (groove structure) T3 is about 5 microns～100 microns.
Fig. 7 has illustrated the directive property light 281,282 of light source module B in forming the light path that penetrates light 283 through the first blooming 24b, the second blooming 24a and the blooming 25 that passes through to lead; In order clearly to show directive property light 281, directive property light 282, to penetrate light 283 respectively at light path through the first blooming 24b, the second blooming 24a and guiding blooming 25; Fig. 7 only shows the first blooming 24b, the second blooming 24a and guiding blooming 25, promptly omits and illustrates display module P and other retes.
Hold the above, as shown in Figure 7, directive property light 281 is directly to penetrate as much as possible and do not produce total reflection or refraction in through the first blooming 24b time.Then, directive property light 282 also is directly to penetrate as much as possible and do not produce total reflection or refraction in through the second blooming 24a time.Afterwards, directive property light 282 is to produce total reflection as much as possible on the guiding optical texture T3 of guiding blooming 25, penetrates light 283 to form.Through the setting of the above-mentioned first blooming 24b, the second blooming 24a and guiding blooming 25, just can make the light of light source module B with oblique direction incident display module P, penetrate guiding blooming 25 with direction again.
Please refer again to Fig. 1, the display device 100 of present embodiment also can further comprise polaroid 23b and upward polaroid 23a down except above-mentioned display module P, light source module B and guiding blooming 25.Following polaroid 23b is arranged between the first substrate 21b and the first blooming 24b, and upward polaroid 23a is arranged between the second substrate 21a and the second blooming 24a.Following polaroid 23b and last polaroid 23a can adopt bitintability thin polymer film (dichroic polymer films), and it for example is the film (polyvinyl-alcohol-based film) of polyvinyl alcohol.(angle between the transmission shaft of transmission axis and last polaroid 23a (transmission axis) can be 5 degree to 175 degree to the transmission shaft of following polaroid 23b.
In addition, have better display quality in order to make display module P, the display module P of present embodiment also comprises compensate film 231 and diffusion barrier 27.Compensate film 231 is arranged on down polaroid 23b and goes up between the polaroid 23a.In the present embodiment, compensate film 231 is arranged on down between the polaroid 23b and the first substrate 21b and explains for example.In other words; Compensate film (not illustrating) also can be arranged between the polaroid 23a and the second substrate 21a, or compensate film 231 is being set and between the last polaroid 23a and the second substrate 21a, compensate film (not illustrating) is being set between the polaroid 23b and the first substrate 21b down.Compensate film 231 is set increases the contrast expression of display module P and the visual angle that increases display module P.In addition, diffusion barrier 27 is arranged on the top of polaroid 23a, when passing through, produces diffusion so that penetrate light 283, and then makes display module P have better display quality.So, the present invention does not limit and must use diffusion barrier 27.
Hold the above; Because the display medium 20 of the display module P of present embodiment is to drive through the vertical electric field 201 between pel array 22b and the counter electrode 22a, the problem of existing low penetration rate and high driving voltage in the time of therefore can solving Traditional IP S display module employing transverse electric field driving blue phase liquid crystal.In addition; Because directive property light 281 that the light source module B of present embodiment is produced and the incident direction D2 of directive property light 282 when injecting display medium 20 are not vertical each other with the surface of the first substrate 21b; Therefore the directive property light 282 with respect to light source module B in the time of making display medium 20 be driven into the optical anisotropy still has birefringence, and then makes the display module P can show image.
In the embodiment of above-mentioned Fig. 1, last polaroid 23a is arranged between the second substrate 21a and the second blooming 24a.Thus, can be so that directive property light 282 polarization states more can not receive the influence of the second blooming 24a and guiding blooming 25.But, the invention is not restricted to this.According to other embodiment, last polaroid 23a also can be arranged on the top of the second blooming 24a or guiding blooming 25, shown in Fig. 3 A.
In addition, according to another embodiment, also can omit the second blooming 24b among the display module P, shown in Fig. 3 B.Thus, can be so that directive property light 282 polarization states more can not receive the influence of the second blooming 24a.But, the invention is not restricted to this.
In addition, in the embodiment of above-mentioned Fig. 1, the blooming piece 25 of display module P is the structures that adopt shown in Fig. 6 A and Fig. 6 B.Yet, the invention is not restricted to this.According to other embodiment, the blooming piece 25 of display device 100 can also adopt other kinds form or structure, is described below.
Fig. 8 A is the diagrammatic cross-section of the blooming in the display device according to another embodiment of the present invention.Fig. 8 B is the schematic perspective view of the blooming of Fig. 8 A.Please with reference to Fig. 8 A and Fig. 8 B; The guiding optical texture T3 ' of the guiding blooming 25 of present embodiment is a groove structure; The first side wall W5 ' of optical texture (groove structure) T3 is a curved surface sidewall, and the second sidewall W6 ' of optical texture (groove structure) T3 ' is a flat sidewall.Therefore; When directive property light 282 is incident upon blooming piece 25; Directive property light 282 can produce total reflection in the first side wall (curved surface sidewall) W5 ' of guiding optical texture T3 and form ejaculation light 283, and makes that penetrating light 283 can vertically penetrate guiding blooming 25.Particularly; Because the first side wall W5 ' is a curved surface sidewall; Therefore directive property light 282 penetrates the light 283 to form except produce total reflection in the first side wall (curved surface sidewall) W5 '; Some ejaculation light 283 that produces total reflection is reflected onto after the first side wall (curved surface sidewall) W5 ' goes up, because of incident angle less than the angle of total reflection, and penetrate blooming piece 25 with the form of refraction.Therefore; If the first side wall W5 ' of optical texture (groove structure) T3 ' is the structure that adopts curved surface sidewall; Can have the angle of 60 degree～120 degree so that penetrate the ejaculation direction and the outgoing plane of light 283, that is penetrate light 283 and can penetrate by divergence form, so that image quality is preferable.Similarly, in the present embodiment, the recess width p4 of optical texture (groove structure) T3 ' is about 5 microns～100 microns.
In the embodiment of above-mentioned Fig. 8 A and Fig. 8 B; The radius-of-curvature of the curved surface sidewall W5 ' of all guiding optical texture T3 ' of guiding blooming 25 is all identical; Therefore, each guiding optical texture T3 ' of the guiding blooming 25 of the embodiment of Fig. 8 A and Fig. 8 B is identical groove pattern.Yet, the invention is not restricted to this, according to other embodiment, the optical texture of guiding blooming 25 also can be incomplete same pattern, shown in Fig. 9 A and Fig. 9 B.
Fig. 9 A is the diagrammatic cross-section of the blooming in the display device according to another embodiment of the present invention.Fig. 9 B is the schematic perspective view of the blooming of Fig. 9 A.Please with reference to Fig. 9 A and Fig. 9 B; In the present embodiment; Each guiding optical texture T3 ' of guiding blooming 25 has a flat sidewall and a curved surface sidewall, but the radius-of-curvature of the curved surface sidewall curvature sidewall of said guiding optical texture T3 ' is incomplete same.For example; The radius-of-curvature of the curved surface sidewall W5 ' of the guiding optical texture T3 ' of present embodiment is different from curved surface sidewall W5 " radius-of-curvature, and have than the guiding optical texture T3 ' of the curved surface sidewall W5 ' of larger radius of curvature and have curved surface sidewall W5 than small curvature radius " guiding optical texture T3 ' be arranged alternately each other.
Figure 10 A is the diagrammatic cross-section of the blooming in the display device according to another embodiment of the present invention.Figure 10 B is the schematic perspective view of the blooming of Figure 10 A.Please with reference to Figure 10 A and Figure 10 B; In the present embodiment; Each guiding optical texture T3 ' of guiding blooming 25 has a flat sidewall and a curved surface sidewall; And the curved surface sidewall of each guiding optical texture T3 ' has a plurality of radius-of-curvature, and diminishes gradually the closer to the radius-of-curvature of the curved surface sidewall of the bottom of groove structure T3 '.For instance, the first side wall of the groove structure T3 ' of guiding blooming 25 is a curved surface sidewall, and it comprises curved surface sidewall W5-1 and curved surface sidewall W5-2, and the radius-of-curvature of curved surface sidewall W5-1 is less than the radius-of-curvature of curved surface sidewall W5-2.At this, for clearly explanation, present embodiment is to be that example is explained with the curved surface sidewall W5-1 of two different curvature and W5-2, and the first side wall of the groove structure T3 ' of the right blooming 25 that in fact leads is a continuous curve surface.
Hold the above; When directive property light 282 is incident upon guiding blooming 25; Directive property light 282 penetrates the light 283 to form except produce total reflection in curved surface sidewall W5-1, W5-2, and part penetrates light 283 and can further be reflected onto curved surface sidewall W5-1 and penetrate blooming piece 25 with the form of refraction again after going up.Because the radius-of-curvature the closer to the curved surface sidewall W5-1 of the bottom of groove structure T3 ' is more little; Thereby the tangent line of curved surface sidewall W5-1 and the angle that penetrates between the direction of transfer of light 283 are just more little, so just can make to penetrate light 283 and be easier to produce refraction and ejaculation blooming piece 25 after being reflected onto this place.In other words, the curved surface sidewall W5-1 that has than small curvature radius can make more ejaculation light 283 produce refraction and penetrate blooming piece 25 in this.In other words, the light of the guiding blooming 25 of Figure 10 A and Figure 10 B angle of dispersing and distribution meeting come more greatly than the embodiment of Fig. 8 A and Fig. 8 B and are wider.
Figure 11 and Figure 12 are the diagrammatic cross-sections of the display device of several embodiment according to the present invention.The embodiment of Figure 11 and Figure 12 is similar with the embodiment of above-mentioned Fig. 1, so components identical is with identical symbolic representation, and no longer repeat specification.The embodiment difference of the embodiment of Figure 11 and Fig. 1 is that pel array 221b has orientation slit pattern 60, and counter electrode 221a is provided with orientation projection pattern 70.Pel array 221b be provided with orientation projection pattern 70 is set on orientation slit pattern 60 and the counter electrode 221a can be so that the distribution of vertical electric field 202 changes, and then reach the effect that display medium 20 is produced the multiple domain orientations.Similarly, the embodiment difference of the embodiment of Figure 12 and Fig. 1 is that pel array 221b has orientation slit pattern 60, and counter electrode 221a has orientation slit pattern 80.Orientation slit pattern 60 being set and at counter electrode 221a orientation slit pattern 80 being set at pel array 221b equally can be so that the distribution of vertical electric field 202 changes, and then reaches the effect that display medium 20 is produced the multiple domain orientations.
The embodiment of above-mentioned Figure 11 and Figure 12 is provided with alignment pattern (for example being orientation slit pattern or orientation projection pattern) on pel array 221b and counter electrode 221a, so the invention is not restricted to this.According to other embodiment, also can only alignment pattern (for example being orientation slit pattern or orientation projection pattern) be set, or only alignment pattern (for example being orientation slit pattern or orientation projection pattern) be set at counter electrode 221a at pel array 221b.In addition, the combination of the alignment pattern on pel array 221b and counter electrode 221a also is not limited to the embodiment of Figure 11 and Figure 12.In other words, also can be provided with on orientation projection pattern and the counter electrode 221a orientation slit pattern is set, or be provided with on orientation projection pattern and the counter electrode 221a in pel array 221b the orientation projection pattern is set in pel array 221b.
In order to explain that display device of the present invention has lower driving voltage and preferable penetration compared to Traditional IP S display device, below come to make comparisons with Traditional IP S display device with several instances.
The comparison I of driving voltage
Figure 13 is with the voltage of the transverse electric field driving blue phase liquid crystal of Traditional IP S display module and the graph of a relation of penetration.Please with reference to Figure 13, the transverse axis of Figure 13 is represented voltage (V), and the longitudinal axis is represented the penetration of display module.Can know that by Figure 13 when driving blue phase liquid crystal with Traditional IP S display module, its driving voltage needs just have preferable penetration up to 52V, just, when driving voltage need reach 52V, can make display module have Kerr constanr value (Kerr constant) and be 12.68nm/V
2
Figure 14 A and Figure 14 B are with the voltage of the vertical electric field driving blue phase liquid crystal of display device of the present invention and the graph of a relation of light angle.The transverse axis of Figure 14 A and Figure 14 B is represented the angle of inclination (angle θ 1 ' just shown in Figure 1) of the light of light source module, and the longitudinal axis is represented voltage (V).
Please earlier with reference to Figure 14 A, the display medium thickness of the display module in this display device (claiming cell gap again) is 3.5 microns, and the display module of Figure 14 A has Kerr constanr value (Kerr constant) for 12.68nm/V
2Can know that by Figure 14 A the required driving voltage of the display module of Figure 14 A (below the 15V) is far below the driving voltage (52V) of the IPS display module of Figure 13.In addition, in the display device of Figure 14 A, when the angle of inclination of the light of light source module was big more, its driving voltage was more little.
Please earlier with reference to Figure 14 B, the display medium thickness of the display module in this display device (claiming cell gap again) is 5 microns, and the display module of Figure 14 B has Kerr constanr value (Kerr constant) equally for 12.68nm/V
2Can know by Figure 14 B, the required driving voltage of the display module of Figure 14 B (below the 18V), it is still far below the driving voltage (52V) of the IPS display module of Figure 13.Similarly, in the display device of Figure 14 B, when the angle of inclination of the light of light source module was big more, its driving voltage was more little.
The comparison II of driving voltage
Figure 15 is with the voltage of the transverse electric field driving blue phase liquid crystal of Traditional IP S display module and the graph of a relation of penetration.Please with reference to Figure 15, the transverse axis of Figure 15 is represented voltage (V), and the longitudinal axis is represented the penetration of display module.In Figure 15, be with the laser beam of 633nm light, and said laser beam is to inject in the IPS display module with vertical direction as light source module.Can know to have maximum penetration when driving voltage can make display module during up to 193Vrms by Figure 15.
Figure 16 drives the voltage of blue phase liquid crystal and the graph of a relation of penetration with the vertical electric field of display device of the present invention.Please with reference to Figure 16, the transverse axis of Figure 16 is represented voltage (V), and the longitudinal axis is represented the penetration of display module.In Figure 16, be that t representes display medium thickness (claiming cell gap again), and θ representes the light angle of inclination (angle θ 1 ' just shown in Figure 1) of light source module with the laser beam of the 633nm light as light source module.Can know by Figure 16, under the combination at different dielectric thickness (claiming cell gap again) and different light angle of inclination, can obtain the relation curve of four kinds of voltages and penetration.So, in above-mentioned four curves, make display module have driving voltage required under the condition of high-penetration degree all much smaller than the required driving voltage (193Vrms) of Traditional IP S display module.
The comparison of hysteresis (Hysteresis)
General blue phase liquid crystal has hysteresis, and when blue phase liquid crystal is applied in the display medium of display device, needs inhibition usually or reduce its hysteresis, influence with the hysteresis phenomenon of avoiding blue phase liquid crystal display module GTG control accuracy.
Figure 17 is the measurement result that drives the hysteresis phenomenon of blue phase liquid crystal with the transverse electric field of Traditional IP S display module.Figure 18 is the measurement result that drives the hysteresis phenomenon of blue phase liquid crystal with the vertical electric field of display device of the present invention.In general, the measuring method of the hysteresis phenomenon of blue phase liquid crystal is, upwards boost gradually measuring voltage and penetration curve M, M ', and gradually step-down downwards with measuring voltage and penetration curve N, N '.Calculate two curve M, N (M ', N ') both voltage difference under the condition of half penetration then.If the hysteresis phenomenon of the big more expression blue phase liquid crystal of voltage difference of two curve M, N (M ', N ') is obvious more.Otherwise, if the hysteresis phenomenon of the more little expression blue phase liquid crystal of voltage difference of two curve M, N (M ', N ') is more little.
Can know by Figure 17 and Figure 18; The hysteresis phenomenon that drives blue phase liquid crystal with the transverse electric field of Traditional IP S display module is higher because curve M, N (Figure 17) in the voltage difference under the condition of half penetration obviously greater than curve M ', (Figure 18) voltage difference under the condition of half penetration of N '.
Display medium thickness is for the influence of driving voltage
Figure 19 is the display medium thickness of display device of the present invention and the graph of a relation between the voltage.The transverse axis of Figure 19 is represented the thickness (or claiming cell gap) of display medium, and the longitudinal axis is represented voltage (V).In Figure 19; Be with the laser beam of 550nm light as light source module; θ representes the light angle of inclination (angle θ 1 ' just shown in Figure 1) of light source module, and four curves of Figure 19 are all and can make display module have Kerr constanr value (Kerr constant) for 10.2nm/V
2Can know by Figure 19, when the thickness of display medium (or claiming cell gap) more hour, required driving voltage is also just more little.
Figure 20 be display device of the present invention under the thickness condition of different display mediums, the graph of a relation between its voltage and the penetrance.The transverse axis of Figure 20 is represented voltage (V), and the longitudinal axis is represented penetration.In Figure 20, the thickness of display medium (or claim cell gap) is respectively 1,2,5 micron, and it is with the laser beam of the 550nm light as light source module, and the light angle of inclination of light source module is 70 degree (angle θ 1 ' just shown in Figure 1).Can know that by Figure 20 the driving voltage of display device of the present invention is relevant with the thickness of display medium.
Hold the above, because display module of the present invention is between pel array and electrode layer, to produce vertical electric field to drive the display medium of display module.Particularly; Because the incident direction of light when injecting display medium that light source module produced is not vertical each other with the inside surface of first substrate, the light with respect to light source module in the time of therefore making display medium be driven into the optical anisotropy still has birefringence.Based on above-mentioned, because of can adopting vertical electric field, display device of the present invention drives said display medium, the problem of existing low penetration rate and high driving voltage in the time of therefore can solving tradition employing transverse electric field driving blue phase liquid crystal.
In addition, display device of the present invention more can comprise a plurality of compensate films, and increases the display quality of display device by being provided with of a plurality of compensate films.Below will enumerate the advantage that first embodiment to the, seven embodiment exposed installations are put compensate film.Must explanation be, the display device in the following example is similar with the embodiment of above-mentioned Fig. 1, so components identical is with identical symbolic representation, and no longer repeat specification, the abridged part please refer to previous embodiment.Below will be further described to its difference.
First embodiment
Figure 21 is the diagrammatic cross-section according to the display device of first embodiment of the invention.Please with reference to Figure 21, the difference of the embodiment of display device 100a and Fig. 1 is: display device 100a comprises the first compensate film 28b and the second compensate film 28a, and does not comprise compensate film 231.In detail, the first compensate film 28b is positioned on the outside surface S2 of the first substrate 21b, and the second compensate film 28a is between the second substrate 21a and guiding blooming 25.
In the present embodiment, following polaroid 23b is positioned on the outside surface S2 of the first substrate 21b, and last polaroid 23a is positioned on the outside surface S4 of the second substrate 21a.According to present embodiment; Following polaroid 23b is between the first compensate film 28b and the first blooming 24b; Last polaroid 23a between the second compensate film 28a and the second blooming 24a, and the second blooming 24a guiding blooming 25 and between the polaroid 23a.According to present embodiment, directive property light 282 is understood in regular turn through following polaroid 23b, the first compensate film 28b, the second compensate film 28a and last polaroid 23a.
According to present embodiment, the first compensate film 28b and the second compensate film 28a can be used to adjust the polarization state of the directive property light 282 that is arranged in display module P, and the polarization state that makes directive property light 282 meets the direction of the absorption axes of polaroid 23a after adjustment.In view of the above, can reduce the light leakage phenomena that is produced when directive property light 282 forms emergent ray 283, further promote the contrast ratio (contrast ratio) of display device 100a in dark attitude.
For further specifying the effect of the first compensate film 28b and the second compensate film 28a, the compensation process of the first compensate film 28b and the second compensate film 28a will be described below with Poincare sphere (Poincar é sphere).Before this; Direction for clear definition directive property light 281 and directive property light 282; And go up polaroid 23a, polaroid 23b, the first compensate film 28b and the second compensate film 28a absorption axes angle down; Below will use polarization angle Ψ (polar angle) and orientation angle Φ to define, detailed explanation is following.
Figure 22 is the schematic perspective view according to light source module in the display device of the present invention and display module.Please with reference to Figure 22, be benchmark with the center of display module P, projection line and the angle of directions X of any direction D4 on the XY plane is orientation angle Φ.Angle between any direction D4 and the Z direction is polarization angle Ψ.For example, the polarization angle Ψ of direction D5 is that 90 degree and orientation angle Φ are 0 degree; The polarization angle Ψ of direction D6 is that 90 degree and orientation angle Φ are 90 degree; The polarization angle Ψ of direction D7 is that 90 degree and orientation angle Φ are 180 degree; The polarization angle Ψ of direction D8 is that 90 degree and orientation angle Φ are 270 degree.
Figure 23 is the Poincare sphere synoptic diagram according to the display device using compensation film of the first embodiment of the invention compensation process when the dark attitude.Please with reference to Figure 23, when the polarization angle Ψ of directive property light 282 is that 70 degree and deflection Φ are 270 when spending, effective angle change between following polaroid 23b and the last polaroid 23a, therefore, directive property light 282 penetrate attitude P
1A with the absorption axes of last polaroid 23a
1State separates, and causes light leakage phenomena.According to present embodiment, the first compensate film 28b can be with the polarization state of directive property light 282 by P
1State rotates to P
0State, the second compensate film 28a can be with the polarization state of directive property light 282 by P
0State rotates to A
1State.In view of the above, after directive property light 282 was through the first compensate film 28b and the second compensate film 28a, the polarization state of directive property light 282 can be by P
1State rotates to A
1Therefore state can avoid light leakage phenomena to take place.
Table one is the parameter setting data of each member among the display device 100a, and wherein Nz is the refraction guiding ratio, and its calculating formula is following:
Nz=(n
x-n
z)/(n
x-n
y)
Wherein, n
xBe x axle refractive index, n
yBe y axle refractive index, n
zBe z axle refractive index.D (n
x-n
y) being the phasic difference value, incident ray is directive property light 281.Figure 24 is the contrast ratio contour map that the display device of Figure 21 is surveyed according to table one parameter setting.
Table one
| Incident ray | Ψ=70 degree Φ=270 degree λ=550nm |
| Following polaroid | Φ=45 degree |
| First compensate film | Φ=38.5 degree Nz=0.54 d (n x-n y)=256nm |
| Second compensate film | Φ=-38.5 degree Nz=0.54 d (n x-n y)=256nm |
| Last polaroid | Φ=-45 degree |
Please, represent respectively that to four inboard level lines contrast ratio is 100,200,500 and 1000 level line by the outside with reference to Figure 24.Can know from Figure 24; Contrast ratio approximately is 20 degree greater than the field-of-view cone (viewing cone) of 1000:1, and wherein the field-of-view cone of 20 degree changes at vertical electric field that the directive property light 282 for collimation is enough in the blue phase liquid crystal display of VFS (Vertical Field Switching).For wideization visual angle, can use backlight that the guiding blooming 25 of the place ahead diffusion barrier 27 or bent type scatters collimation to reach wide viewing angle.So, the invention is not restricted to this.Below enumerate the contrast ratio of other parameter settings to be optimized.
Table two is parameter setting data of each member among the display device 100a.Figure 25 is the contrast ratio contour map that the display device of Figure 21 is surveyed according to table two parameter setting.
Table two
| Incident ray | Ψ=60 degree Φ=270 degree λ=550nm |
| Following polaroid | Φ=45 degree |
| First compensate film | Φ=42 degree Nz=0.63 d (n x-n y)=260nm |
| Second compensate film | Φ=-42 degree Nz=0.63d (n x-n y)=260nm |
| Last polaroid | Φ=-45 degree |
Contrast ratio is that the isocontour area of 1000:1 is that the isocontour area of 1000:1 is big than contrast ratio among Figure 24 among Figure 25.Yet the polarization angle of less incident ray can cause higher driving voltage.
Table three is parameter setting data of each member among the display device 100a.Figure 26 is the contrast ratio contour map that the display device of Figure 21 is surveyed according to table three parameter setting.
Table three
| Incident ray | Ψ=70 degree Φ=270 degree λ=550nm |
| Following polaroid | Φ=40 degree |
| First compensate film | Φ=36 degree Nz=0.506 d (n x-n y)=259nm |
| Second compensate film | Φ=-36 degree Nz=0.506 d (n x-n y)=259nm |
| Last polaroid | Φ=-40 degree |
Table four is parameter setting data of each member among the display device 100a.Figure 27 is the contrast ratio contour map that the display device of Figure 21 is surveyed according to table four parameter setting.Figure 27 shows that polarization angle Ψ is that 70 degree and orientation angle Φ are the level line of contrast ratio of optimization of the incident ray of 270 degree.
Table four
| Incident ray | Ψ=70 degree Φ=270 degree λ=550nm |
| Following polaroid | Φ=30 degree |
| First compensate film | Φ=29.75 degree Nz=0.399 d (n x-n y)=272nm |
| Second compensate film | Φ=-29.75 degree Nz=0.399 d (n x-n y)=272nm |
| Last polaroid | Φ=-30 degree |
Table five is parameter setting data of each member among the display device 100a.Figure 28 is that the display device of Figure 21 is set the contrast ratio contour map of being surveyed according to table Wucan number.Figure 28 is that polarization angle Ψ is that 70 degree and orientation angle Φ are the level line of contrast ratio of optimization of the incident ray of 270 degree.
Table five
| Incident ray | Ψ=70 degree Φ=270 degree λ=550nm |
| Following polaroid | Φ=30 degree |
| First compensate film | Φ=31 degree Nz=0.44 d (n x-n y)=264nm |
| Second compensate film | Φ=-31 degree Nz=0.44 d (n x-n y)=264nm |
| Last polaroid | Φ=-30 degree |
Table six is parameter setting data of each member among the display device 100a.Figure 29 is the contrast ratio contour map that the display device of Figure 21 is surveyed according to table six parameter setting.Figure 29 shows that polarization angle Ψ is that 60 degree and orientation angle Φ are the level line of contrast ratio of optimization of the incident ray of 270 degree.
Table six
| Incident ray | Ψ=60 degree Φ=270 degree λ=550nm |
| Following polaroid | Φ=30 degree |
| First compensate film | Φ=32.5 degree Nz=0.4775 d (n x-n y)=264.5nm |
| Second compensate film | Φ=-32.5 degree Nz=0.4775 d (n x-n y)=264.5nm |
| Last polaroid | Φ=-30 degree |
Second embodiment
Figure 30 is the diagrammatic cross-section according to the display device of second embodiment of the invention.Please with reference to Figure 30, the display device 100b of present embodiment is similar with the display device 100a of first embodiment, and its difference is: display device 100b also comprises the 3rd compensate film 31b and the 4th compensate film 31a.The 3rd compensate film 31b is at the first compensate film 28b and down between the polaroid 23b, the 4th compensate film 31a the second compensate film 28a and between the polaroid 23a.
According to present embodiment, the 3rd compensate film 31b and the 4th compensate film 31a for example are respectively the biaxiality compensate film.The 3rd compensate film 31b and the 4th compensate film 31a can design according to different orientation angle Φ, to compensate the difference of angle between polaroid 23a and the following polaroid 23b.According to present embodiment, directive property light 282 is understood in regular turn through following polaroid 23b, the 3rd compensate film 31b, the first compensate film 28b, the second compensate film 28a, the 4th compensate film 31a and last polaroid 23a.
Figure 31 is the Poincare sphere synoptic diagram according to the display device using compensation film of the second embodiment of the invention compensation process when the dark attitude.Please with reference to Figure 31, in the present embodiment, P
2State is by P
1Depart from the state, wherein P
2STA representation orientation angle Φ is 300 polarization states when spending, P
1STA representation orientation angle Φ is 270 polarization states when spending.In the present embodiment, the 3rd compensate film 31b can be with polarization state by P
2State rotates to P
1State.Then, the first compensate film 28b and the second compensate film 28a can be with polarization state by P
1State rotates to A
1State.Afterwards, the 4th compensate film 31a can be with polarization state by A
1State rotates to the A of the absorption axes that meets polaroid 23a
2State.
Table seven is parameter setting data of each member among the display device 100b.Figure 32 is the contrast ratio contour map that the display device of Figure 30 is surveyed according to table seven parameter setting.
Table seven
| Incident ray | Ψ=70 degree Φ=270 degree λ=550nm |
| Following polaroid | Φ=30 degree |
| The 3rd compensate film | Φ=25.75 degree Nz=0.851 d (n x-n y)=281.5nm |
| First compensate film | Φ=29.72 degree Nz=0.3984 d (n x-n y)=272nm |
| Second compensate film | Φ=-29.72 degree Nz=0.3984 d (n x-n y)=272nm |
| The 4th compensate film | Φ=-25.75 degree Nz=0.851 d (n x-n y)=281.5nm |
| Last polaroid | Φ=-30 degree |
The 3rd embodiment
Figure 33 is the diagrammatic cross-section according to the display device of third embodiment of the invention.Please with reference to Figure 33; The display device 100c of present embodiment is similar with the display device 100b of second embodiment; Its difference is: in display device 100c; The 3rd compensate film 31b is between the first compensate film 28b and the first substrate 21b, and the 4th compensate film 31a is between the second compensate film 28a and the second substrate 21a.
According to present embodiment, the 3rd compensate film 31b and the 4th compensate film 31a for example are respectively the biaxiality compensate film.The 3rd compensate film 31b and the 4th compensate film 31a can design according to different orientation angle Φ, to compensate the difference of angle between polaroid 23a and the following polaroid 23b.According to present embodiment, directive property light 282 is understood in regular turn through following polaroid 23b, the first compensate film 28b, the 3rd compensate film 31b, the 4th compensate film 31a, the second compensate film 28a and last polaroid 23a.
Figure 34 is the Poincare sphere synoptic diagram according to the display device using compensation film of the third embodiment of the invention compensation process when the dark attitude.Please with reference to Figure 34, in the present embodiment, the first compensate film 28b with polarization state by P
1State rotates to P
0State.Then, the 3rd compensate film 31b is with the P of polarization state by line style polarization state (linear polarization state)
0State rotates to the C of round polarization (circular polarization state)
1State.Afterwards, the 4th compensate film 31a is with the C of polarization state by round polarization
1State rotates to the P of line style polarization state
0State.Afterwards, the second compensate film 28a with polarization state by P
0State rotates to the A of the absorption axes that meets polaroid 23a
1State.Because round polarization light does not receive the influence of the orientation angle of blue phase liquid crystal material, therefore round polarization light can improve the visual angle that is used for the VFS blue phase liquid crystal display.
Table eight is parameter setting data of each member among the display device 100c.Figure 35 is the contrast ratio contour map that the display device of Figure 33 is surveyed according to table eight parameter setting.
Table eight
| Incident ray | Ψ=70 degree Φ=270 degree λ=550nm |
| Following polaroid | Φ=45 degree |
| First compensate film | Φ=40 degree Nz=0.575 d (n x-n y)=256nm |
| The 3rd compensate film | Φ=90 degree Nz=0.5 d (n x-n y)=137nm |
| The 4th compensate film | Φ=0 degree Nz=0.5 d (n x-n y)=137nm |
| Second compensate film | Φ=-40 degree Nz=0.575 d (n x-n y)=256nm |
| Last polaroid | Φ=-45 degree |
Table nine is parameter setting data of each member among the display device 100c.Figure 36 is the contrast ratio contour map that the display device of Figure 33 is surveyed according to table nine parameter setting.Figure 36 shows that polarization angle Ψ is that 60 degree and orientation angle Φ are the level line of contrast ratio of optimization of the directive property light 281 of 270 degree.
Table nine
| Incident ray | Ψ=60 degree Φ=270 degree λ=550nm |
| Following polaroid | Φ=45 degree |
| First compensate film | Φ=42 degree Nz=0.63 d (n x-n y)=260nm |
| The 3rd compensate film | Φ=90 degree Nz=0.5 d (n x-n y)=137nm |
| The 4th compensate film | Φ=0 degree Nz=0.5 d (n x-n y)=137nm |
| Second compensate film | Φ=-42 degree Nz=0.63 d (n x-n y)=260nm |
| Last polaroid | Φ=-45 degree |
The 4th embodiment
Figure 37 is the diagrammatic cross-section according to the display device of fourth embodiment of the invention.Please with reference to Figure 37, the display device 100d of present embodiment is similar with the display device 100b of second embodiment, and its difference is: in display device 100d, following polaroid 23b for example is the polaroid of web form (wire-grid polarizer).
In the present embodiment, the first compensate film 28b, the second compensate film 28a, the 3rd compensate film 31b and the 4th compensate film 31a all are arranged between the following polaroid 23b of polaroid 23a and web form.According to present embodiment, directive property light 282 is understood following polaroid 23b, the 3rd compensate film 31b, the first compensate film 28b, the second compensate film 28a, the 4th compensate film 31a and the last polaroid 23a of process web form in regular turn.
Figure 38 is the Poincare sphere synoptic diagram according to the display device using compensation film of the fourth embodiment of the invention compensation process when the dark attitude.Please with reference to Figure 38, in the present embodiment, the orientation angle Φ of the absorption axes of the following polaroid 23b of web form is 90 degree, and the orientation angle Φ of the absorption axes of last polaroid 23a is 0 degree.After the directive property light 282 process following polaroid 23b of web form, directive property light 282 can be by P
1State is rotated into the P of linear polarization
0State.
It is 270 polarization states when spending that the 3rd compensate film 31b does not change orientation angle Φ.The first compensate film 28b is rotated into line style light the C of round polarization light by the P0 state
1State.The second compensate film 28a with round polarization light by C
1State is rotated into the A of the absorption axes that meets polaroid 23a
0State.Therefore, can obtain good dark attitude performance.
Yet, as the orientation angle Φ of directive property light 282 (for example being 300 degree) not simultaneously, polarization state P
1State is by P
0Depart from the state, at this moment, the orientation angle Φ that the 3rd compensate film 31b can be different (for example being to 315 degree from 225 degree) is with P
1State rotates back to P
0State.Then, the first compensate film 28b and the second compensate film 28a with polarization state by P
0State is via C
1State is rotated into P
2State.Afterwards, the 4th compensate film 31a with the polarization light of line style by P
2State shifts into the A of the absorption axes that meets polaroid 23a
1State, and do not have light leakage phenomena to take place.
Table ten is parameter setting data of each member among the display device 100d.Figure 39 is the contrast ratio contour map that the display device of Figure 37 is surveyed according to table ten parameter setting.Figure 39 shows that polarization angle Ψ is that 70 degree and orientation angle Φ are the level line of contrast ratio of optimization of the directive property light 281 of 270 degree.
Table ten
| Incident ray | Ψ=70 degree Φ=270 degree λ=550nm |
| Following polaroid | Φ=90 degree |
| The 3rd compensate film | Φ=90 degree Nz=0.81 d (n x-n y)=317.35nm |
| First compensate film | Φ=45 degree Nz=0.5 d (n x-n y)=137nm |
| Second compensate film | Φ=-45 degree Nz=0.5 d (n x-n y)=137nm |
| The 4th compensate film | Φ=0 degree Nz=0.81 d (n x-n y)=317.35nm |
| Last polaroid | Φ=0 degree |
Because the following polaroid 23b of web form has extraordinary extinction ratio (extinction ratio), therefore can obtain not only high but also wide contrast level line.In addition, the following polaroid 23b of web form is not sharp and have a little effect of dispersion (dispersion effect) for the angle of directive property light 281.Therefore, the following polaroid 23b of web form is suitable for the VFS blue phase liquid crystal display.
The 5th embodiment
Figure 40 is the diagrammatic cross-section according to the display device of fifth embodiment of the invention.Please with reference to Figure 40; The display device 100e of present embodiment is similar with the display device 100b of second embodiment; Its difference is: in display device 100e; Last polaroid 23a is between guiding blooming 25 and diffusion barrier 27, and the 4th compensate film 31a comprises A plate compensate film 31a-1 and C plate compensate film 31a-2.
In the present embodiment, the first compensate film 28b, the second compensate film 28a and the 3rd compensate film 31b are the biaxiality compensate film.The 3rd compensate film 31b is between the following polaroid 23b and the first compensate film 28b, and the first blooming 24b is between the 3rd compensate film 31b and the first compensate film 28b.In addition, the 4th compensate film 31a the second compensate film 28a and between the polaroid 23a, and the second blooming 24a the 4th compensate film 31a and between the polaroid 23a.More detailed, the A plate compensate film 31a-1 among the 4th compensate film 31a-1 is between the C plate compensate film 31a-2 and the second blooming 24a.According to present embodiment, directive property light 282 is understood in regular turn through following polaroid 23b, the 3rd compensate film 31b, the first blooming 24b, the first compensate film 28b, the second compensate film 28a, C plate compensate film 31a-2, A plate compensate film 31a-1 and the second blooming 24a.Then, directive property light 282 can form penetrate light 283 after through guiding blooming 25 and pass through on polaroid 23a.
Figure 41 is the Poincare sphere synoptic diagram according to the display device using compensation film of the fifth embodiment of the invention compensation process when the dark attitude.Please with reference to Figure 41, in the present embodiment, the orientation angle Φ of following polaroid 23b and last polaroid 23a is respectively 0 degree and 90 degree.According to present embodiment, be that 70 degree and orientation angle Φ are the directive property light 281 of 270 degree for incident angle for polarization angle Ψ, when directive property light 281 passed down polaroid 23b, the polarization state of directive property light 281 was P
0State.Yet when the orientation angle Φ of directive property light 281 changes (for example being 300 degree), the polarization state of directive property light 281 can be from P
0State departs from into P
1State.
In the present embodiment, can not change orientation angle Φ be 270 polarization state P when spending to the 3rd compensate film 31b
0State, but can be 200 when spending at orientation angle Φ, with polarization state by P
1State shifts into P
0State.The first compensate film 28b with line style light by P
0State is rotated into C
1The round light of state.The second compensate film 28a with round light by C
1State is rotated into P
0The line style light of state.Because polarization state may change because of the guiding blooming 25 corresponding with last polaroid 23a, therefore, C plate compensate film 31a-2 is that design is used for polarization state by P
0State is rotated into P
2State, and A plate compensate film 31a-1 is used for polarization state by P
2State is rotated into the A of the absorption axes that meets polaroid 23a
1State.
Table ten one is the parameter setting data of each member among the display device 100e, wherein n
oBe fast axle refractive index, n
eBe the slow axis refractive index, d is a thickness.Figure 42 is the contrast ratio contour map that the display device of Figure 40 is surveyed according to table ten parameter setting.Figure 42 shows that polarization angle Ψ is that 70 degree and orientation angle Φ are the level line of contrast ratio of optimization of the directive property light 281 of 270 degree, and wherein representing contrast ratio by the outside respectively to the level line of inboard is 100,200,500 and 1000 level line.Figure 43 is the contour map of the bright attitude surveyed according to table ten parameter setting of the display device of Figure 40, and wherein representing penetrance by the outside respectively to inboard level line is 0.2,0.25,0.3,0.35 and 0.4 level line.
Table ten one
| Incident ray | Ψ=70 degree Φ=270 degree λ=550nm |
| Following polaroid | Φ=0 degree |
| The 3rd compensate film | Φ=0 degree Nz=0.756 d (n x-n y)=254nm |
| First compensate film | Φ=-45 degree Nz=0.501 d (n x-n y)=137.5nm |
| Second compensate film | Φ=45 degree Nz=0.501 d (n x-n y)=137.5nm |
| C plate compensate film | n o=1.5095?n e=1.511?d=48μm |
| A plate compensate film | Φ=0 degree n o=1.5095?n e=1.511?d=70μm |
| Last polaroid | Φ=90 degree |
Yet, the invention is not restricted to this.Under the framework that uses present embodiment, another kind of compensation process can be arranged, be described below.
Figure 44 is the Poincare sphere synoptic diagram according to the display device using compensation film of the fifth embodiment of the invention compensation process when the dark attitude.Please with reference to Figure 44, in the present embodiment, the 3rd compensate film 31b is used in different orientation angles polarization state by P
1State compensation becomes P
0State.The first compensate film 28b is with P
0State shifts into P
2State.Second compensate film is with P
2The state P that squints back
0State.C plate compensate film 31a-2 is with P
0State shifts into P
3State, and A plate compensate film 31a-1 P just
3State shifts into the A of the absorption axes that meets polaroid 23a
1State.
Table ten two is parameter setting data of each member among the display device 100e.Figure 45 is the contrast ratio contour map that the display device of Figure 40 is surveyed according to table ten two parameter settings.Figure 45 shows that polarization angle Ψ is that 70 degree and orientation angle Φ are the level line of contrast ratio of optimization of the directive property light 281 of 270 degree, and wherein representing contrast ratio by the outside respectively to the level line of inboard is 100,200,500 and 1000 level line.Figure 46 is the contour map of the bright attitude surveyed according to table ten two parameter settings of the display device of Figure 40, and wherein representing penetrance by the outside respectively to inboard level line is 0.2,0.25,0.3,0.35 and 0.4 level line.
Table ten two
| Incident ray | Ψ=70 degree Φ=270 degree λ=550nm |
| Following polaroid | Φ=0 degree |
| The 3rd compensate film | Φ=0 degree Nz=0.756 d (n x-n y)=254nm |
| First compensate film | Φ=112.5 degree Nz=0.6738 d (n x-n y)=275nm |
| Second compensate film | Φ=22.5 degree Nz=0.9328 d (n x-n y)=275nm |
| C plate compensate film | n o=1.5095?n e=1.511?d=65μm |
| A plate compensate film | Φ=0 degree n o=1.5095?n e=1.511?d=70μm |
| Last polaroid | Φ=90 degree |
Can know that by Figure 43 and Figure 46 the bright attitude area among Figure 43 is bigger than the bright attitude area among Figure 46.Above-mentioned result is that in the blue phase liquid crystal material, the polarization state of directive property light 282 is round polarization light because in the compensation process of Figure 41.Because round polarization light does not receive the influence of orientation angle, therefore help to improve the level line of contrast ratio.
The 6th embodiment
Figure 47 is the diagrammatic cross-section according to the display device of sixth embodiment of the invention.Please with reference to Figure 47; The display device 100f of present embodiment is similar with the display device 100e of the 5th embodiment; Its difference is: in display device 100f; The 3rd compensate film 31b is between the following polaroid 23b and the first compensate film 28b, and following polaroid 23b is between the first blooming 24b and the 3rd compensate film 31b.
According to present embodiment, the 4th compensate film 31a the second compensate film 28a and between the polaroid 23a, and the second blooming 24a the 4th compensate film 31a and between the polaroid 23a.In the present embodiment, the first compensate film 28b, the second compensate film 28a and the 3rd compensate film 31b are the biaxiality compensate film, and the 4th compensate film 31a comprises A plate compensate film 31a-1 and C plate compensate film 31a-2.According to present embodiment, directive property light 282 is understood in regular turn through following polaroid 23b, the 3rd compensate film 31b, the first compensate film 28b, the second compensate film 28a, C plate compensate film 31a-2, A plate compensate film 31a-1 and the second blooming 24a.Then, directive property light 282 can form penetrate light 283 after through guiding blooming 25 and pass through on polaroid 23a.
Figure 48 is the Poincare sphere synoptic diagram according to the display device using compensation film of the sixth embodiment of the invention compensation process when the dark attitude.Please with reference to Figure 48, in the present embodiment, the polarization angle of directive property light 281 for example is 70 degree, and orientation angle for example is 270 degree, and behind polaroid 23b under the line process backlight, the polarization state of directive property light 282 is P
0State.When the orientation angle of directive property light 282 changes, for example be that orientation angle is 300 when spending, the polarization state of directive property light 282 can be by P
0State departs from into P
1State.The 3rd compensate film 31b is 270 can not change the P of polarization state when spending in orientation angle
0State, but be 300 can be with polarization light by P when spending in orientation angle
1The state P that squints back
0State.The first compensate film 28b is with P
0The line style polarization light of state shifts into C
1The round polarization light second compensate film 28a of state is with C
1The round polarization light of state shifts into P
0State.By depolarizing of guiding blooming 25, the absorption axes of last polaroid 23a moves to A
1State.Afterwards, directive property light 282 by C plate compensate film 31a-2 from P
0State shifts into P
2State, and by A plate compensate film 31a-1 from P
2State shifts into the A of the absorption axes that meets polaroid 23a
1State.
Table ten three is parameter setting data of each member among the display device 100f.Figure 49 is the contrast ratio contour map that the display device of Figure 47 is surveyed according to table ten three parameter settings.Figure 49 shows that polarization angle Ψ is that 70 degree and orientation angle Φ are the level line of contrast ratio of optimization of the directive property light 282 of 270 degree, and wherein representing contrast ratio by the outside respectively to the level line of inboard is 100,200,500 and 1000 level line.Figure 50 is the contour map of the bright attitude surveyed according to table ten three parameter settings of the display device of Figure 47, and wherein representing penetrance by the outside respectively to inboard level line is 0.2,0.25,0.3,0.35 and 0.4 level line.It is desirable to, through under polaroid 23b and on maximum penetration rate after the polaroid 23a be 0.5.
Table ten three
| Incident ray | Ψ=70 degree Φ=270 degree λ=550nm |
| Following polaroid | Φ=0 degree |
| The 3rd compensate film | Φ=0 degree Nz=0.568 d (n x-n y)=209.6nm |
| First compensate film | Φ=-45 degree Nz=0.501 d (n x-n y)=137.5nm |
| Second compensate film | Φ=45 degree Nz=0.501 d (n x-n y)=137.5nm |
| C plate compensate film | n o=1.5095?n e=1.511?d=40μm |
| A plate compensate film | Φ=0 degree n o=1.5095?n e=1.511?d=60μm |
| Last polaroid | Φ=90 degree |
The 7th embodiment
Figure 51 is the diagrammatic cross-section according to the display device of seventh embodiment of the invention.Please with reference to Figure 51; The display device 100g of present embodiment is similar with the display device 100a of first embodiment; Its difference is: in display device 100g; Following polaroid 23b for example is O type polaroid (O-type polarizer), and upward polaroid 23a for example is E type polaroid (E-type polarizer).
Generally speaking, the absorption axes of O type polaroid can be along 0 degree orientation angle Φ.The C axle of E type polaroid (being transmission shaft) can be along 0 degree orientation angle Φ.With following polaroid 23b (O type polaroid) in comparison, last polaroid 23a (E type polaroid) transmits extraordinary ray (Extraordinary ray) and absorbs ordinary light (ordinary ray).Last polaroid 23a (E type polaroid) weakens the light of any direction that transmits non-perpendicular to the C axle.In the present embodiment, the first compensate film 28b and the second compensate film 28a are at last polaroid 23a and down between the polaroid 23b.
Figure 52 is the Poincare sphere synoptic diagram according to the display device using compensation film of the seventh embodiment of the invention compensation process when the dark attitude.Please with reference to Figure 52, in the present embodiment, directive property light 281 processes polaroid 23b polarization state afterwards down are P
1State.The first compensate film 28b is with P
1The line style polarization light of state is offset to C
1The round polarization light of state.Because round polarization light does not receive the influence of orientation angle, therefore round polarization light is applied in the display medium 20 to improve contrast expression and bright attitude.Through behind the material of display medium 20, the second compensate film 28a is with C at directive property light 282
1Squint the back state A of the absorption axes that meets polaroid 23a of the round polarization light of state
1, wherein display medium 20 do not bestow voltage and for etc. the tropism.
Table ten four is parameter setting data of each member among the display device 100g.Figure 53 is the contrast ratio contour map that the display device of Figure 51 is surveyed according to table ten four parameter settings.Figure 53 shows that polarization angle Ψ is that 70 degree and orientation angle Φ are the level line of contrast ratio of optimization of the directive property light 281 of 270 degree, and wherein representing contrast ratio by the outside respectively to the level line of inboard is 500,1000,2000 and 5000 level line.Figure 54 is the contour map of the bright attitude surveyed according to table ten four parameter settings of the display device of Figure 51, and wherein representing penetrance by the outside respectively to inboard level line is 0.1,0.15,0.2,0.25,0.3,0.35 and 0.4 level line.
Table ten four
| Incident ray | Ψ=70 degree Φ=270 degree λ=550nm |
| O type polaroid | Φ=0 degree |
| First compensate film | Φ=-45 degree Nz=0.5 d (n x-n y)=137.5nm |
| Second compensate film | Φ=45 degree Nz=0.5 d (n x-n y)=137.5nm |
| The C axle of E type polaroid | Φ=0 degree |
In sum, the present invention is in the last polaroid of display device and between the polaroid compensate film is set down.Compensate film the polarization state that can adjust the directive property light that is incident in the display module is set, make the polarization state of directive property light meet the direction of the absorption axes of polaroid.The generation that thus, can reduce light leakage phenomena is to improve the contrast ratio of display device.In addition, the setting of compensate film also can transfer the polarization state of directive property light to round polarization state by the line style polarization state and in display medium, transmit.In view of the above, because the light of round polarization state does not receive the influence of orientation angle, therefore can increase the visual angle of display device.
Though the present invention discloses as above with embodiment; Right its is not in order to limit the present invention; Has common knowledge the knowledgeable in the technical field under any; Do not breaking away from the spirit and scope of the present invention, when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (27)
1. a display device is characterized in that, comprising:
One light source module has a directive property light;
One display module is arranged on this light source module top, and this display module comprises:
One first substrate has one first inside surface and one first outside surface;
One second substrate, the subtend that it is positioned at this first substrate has one second inside surface and one second outside surface; And
One display medium; Between this first substrate and this second substrate, wherein this display medium has tropisms such as an optics, and this display medium has an optical anisotropy when receiving an electric field driven; And this directive property light is when getting into this display module; This directive property light is not orthogonal to this first outside surface, and at this directive property light when penetrating this display module, this directive property light is not orthogonal to this second outside surface;
One guiding blooming; Be positioned on this second outside surface of this second substrate of this display module; It has an incidence surface and an exiting surface; This directive property light gets into this guiding blooming and penetrates light from this exiting surface ejaculation to form one from this incidence surface, wherein has an angle between this ejaculation light and this exiting surface;
One first compensate film is positioned on this first outside surface of this first substrate; And
One second compensate film is between this second substrate and this guiding blooming.
2. display device according to claim 1 is characterized in that, also comprises:
One first blooming is arranged on this first outside surface of this first substrate, and this first blooming has a plurality of first optical textures, said first optical texture can make this directive property light in through the time do not produce total reflection in fact; And
One second blooming is arranged on this second outside surface of this second substrate, and wherein this second blooming has a plurality of second optical textures, said second optical texture can make this directive property light in through the time do not produce total reflection in fact.
3. display device according to claim 2 is characterized in that, also comprises:
Once polaroid is positioned on this first outside surface of this first substrate; And
Polaroid on one is positioned on this second outside surface of this second substrate.
4. display device according to claim 3; It is characterized in that; Wherein this time polaroid is between first compensate film and this first blooming; Should go up polaroid between second compensate film and this second blooming, and this second blooming this guiding blooming and should between the polaroid.
5. display device according to claim 4 is characterized in that,
The orientation angle of this first compensate film is 20 degree ~ 50 degree, and Nz is 0.35 ~ 0.75;
The orientation angle of this second compensate film is-20 degree ~-50 degree, and Nz is 0.35 ~ 0.75.
6. display device according to claim 3 is characterized in that, also comprises:
One the 3rd compensate film is between this first compensate film and this time polaroid; And
One the 4th compensate film, this second compensate film and should between the polaroid.
7. display device according to claim 6 is characterized in that, the 3rd compensate film and the 4th compensate film are respectively a biaxiality compensate film.
8. display device according to claim 7 is characterized in that,
The orientation angle of this first compensate film is 20 degree ~ 40 degree, and Nz is 0.25 ~ 0.55;
The orientation angle of this second compensate film is-20 degree～-40 degree, and Nz is 0.25 ~ 0.55;
The orientation angle of the 3rd compensate film is 15 degree ~ 35 degree, and Nz is 0.75 ~ 0.95;
The orientation angle of the 4th compensate film is-15 degree～-35 degree, and Nz is 0.75 ~ 0.95.
9. display device according to claim 6 is characterized in that, this time polaroid is the polaroid of a web form.
10. display device according to claim 9 is characterized in that,
The orientation angle of this first compensate film is 30 degree ~ 60 degree, and Nz is 0.35 ~ 0.65;
The orientation angle of this second compensate film is-30 degree～-60 degree, and Nz is 0.35 ~ 0.65;
The orientation angle of the 3rd compensate film is-10 degree ~ 10 degree, and Nz is 0.71 ~ 0.91;
The orientation angle of the 4th compensate film is 80 degree ~ 100 degree, and Nz is 0.71 ~ 0.91.
11. display device according to claim 3 is characterized in that, also comprises:
One the 3rd compensate film is between this first compensate film and this first substrate; And
One the 4th compensate film is between this second compensate film and this second substrate.
12. display device according to claim 11 is characterized in that, the 3rd compensate film and the 4th compensate film are respectively a biaxiality compensate film.
13. display device according to claim 12 is characterized in that,
The orientation angle of this first compensate film is 25 degree ~ 55 degree, and Nz is 0.45 ~ 0.75;
The orientation angle of this second compensate film is-25 degree～-55 degree, and Nz is 0.47 ~ 0.67;
The orientation angle of the 3rd compensate film is 80 degree ~ 100 degree, and Nz is 0.4 ~ 0.6;
The orientation angle of the 4th compensate film is-10 degree ~ 10 degree, and Nz is 0.4 ~ 0.6.
14. display device according to claim 3 is characterized in that, this first compensate film and this second compensate film are respectively a biaxiality compensate film.
15. display device according to claim 14 is characterized in that, also comprises:
One the 3rd compensate film, between this time polaroid and this first compensate film, and this first blooming is between the 3rd compensate film and this first compensate film; And
One the 4th compensate film, this second compensate film and should between the polaroid, and this second blooming the 4th compensate film and should between the polaroid.
16. display device according to claim 15 is characterized in that, this guiding blooming this second blooming and should between the polaroid.
17. display device according to claim 16 is characterized in that, the 3rd compensate film is a biaxiality compensate film, and the 4th compensate film comprises an A plate compensate film and a C plate compensate film.
18. display device according to claim 17 is characterized in that,
The orientation angle of this first compensate film is degree 100 ~ 125 degree, and Nz is 0.55 ~ 0.8;
The orientation angle of this second compensate film is 10 degree ~ 35 degree, and Nz is 0.8 ~ 1.0;
The orientation angle of the 3rd compensate film is-10 degree ~ 10 degree, and Nz is 0.6 ~ 0.8;
The orientation angle of this A plate compensate film is-10 degree ~ 10 degree, n
oBe 1.4 ~ 1.6, n
eBe 1.4 ~ 1.6;
The n of this C plate compensate film
oBe 1.4 ~ 1.6, n
eBe 1.4 ~ 1.6.
19. display device according to claim 14 is characterized in that, also comprises:
One the 3rd compensate film, between this time polaroid and this first compensate film, and this time polaroid is between this first blooming and the 3rd compensate film; And
One the 4th compensate film, this second compensate film and should between the polaroid, and this second blooming the 4th compensate film and should between the polaroid.
20. display device according to claim 19 is characterized in that, should guiding blooming this second blooming and should between the polaroid.
21. display device according to claim 20 is characterized in that, the 3rd compensate film is a biaxiality compensate film, and the 4th compensate film comprises an A plate compensate film and a C plate compensate film.
22. display device according to claim 21 is characterized in that,
The orientation angle of this first compensate film is degree-35～-55 degree, and Nz is 0.4 ~ 0.6;
The orientation angle of this second compensate film is 35 degree ~ 55 degree, and Nz is 0.4 ~ 0.6;
The orientation angle of the 3rd compensate film is-10 degree ~ 10 degree, and Nz is 0.45 ~ 0.65;
The orientation angle of this A plate compensate film is-10 degree ~ 10 degree, n
oBe 1.4 ~ 1.6, n
eBe 1.4 ~ 1.6;
The n of this C plate compensate film
oBe 1.4 ~ 1.6, n
eBe 1.4 ~ 1.6.
23. display device according to claim 3 is characterized in that, this time polaroid comprises an O type polaroid, and upward polaroid comprises an E type polaroid.
24. display device according to claim 23 is characterized in that,
The orientation angle of this first compensate film is-35 degree～-55 degree, and Nz is 0.4 ~ 0.6;
The orientation angle of this second compensate film is 35 degree ~ 55 degree, and Nz is 0.4 ~ 0.6.
25. display device according to claim 1 is characterized in that, this angle is 60 degree ~ 120 degree.
26. display device according to claim 25 is characterized in that, this angle is 90 degree.
27. display device according to claim 1 is characterized in that, also comprises a diffusion barrier, is positioned on this guiding blooming.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101114566A TWI465805B (en) | 2012-04-24 | 2012-04-24 | Display device |
| TW101114566 | 2012-04-24 |
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| Publication Number | Publication Date |
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| CN102819142A true CN102819142A (en) | 2012-12-12 |
| CN102819142B CN102819142B (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210273442.4A Expired - Fee Related CN102819142B (en) | 2012-04-24 | 2012-08-02 | Display device |
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| Country | Link |
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| CN (1) | CN102819142B (en) |
| TW (1) | TWI465805B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842927A (en) * | 2016-06-01 | 2016-08-10 | 京东方科技集团股份有限公司 | Display panel and display device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6469755B1 (en) * | 1998-10-29 | 2002-10-22 | Hitachi, Ltd. | Illuminating arrangement with reflector having inclined irregularities or corrugations |
| US20030164914A1 (en) * | 1993-12-21 | 2003-09-04 | 3M Innovative Properties Company | Brightness enhancing reflective polarizer |
| CN1454329A (en) * | 2000-04-18 | 2003-11-05 | 3M创新有限公司 | Transflective display with non-inverting image |
| CN1934468A (en) * | 2004-03-22 | 2007-03-21 | 日东电工株式会社 | Circularly polarizing plate, optical film and image display |
| CN1945403A (en) * | 2005-10-05 | 2007-04-11 | 精工爱普生株式会社 | Image display device |
| US20070085946A1 (en) * | 2005-10-13 | 2007-04-19 | Lg.Philips Lcd Co., Ltd. | Liquid crystal display device and method of fabricating the same |
| US20080106689A1 (en) * | 2004-08-31 | 2008-05-08 | Iichiro Inoue | Display Element And Display Device |
| US7391568B2 (en) * | 1998-07-10 | 2008-06-24 | Hitachi, Ltd. | Luminous intensity distribution control device and display having the same |
| CN101354435A (en) * | 2008-09-05 | 2009-01-28 | 清华大学 | Self-positioning method of sensor network node based on distance size ordinal relation |
| US20090027591A1 (en) * | 2007-07-27 | 2009-01-29 | Samsung Electronics Co., Ltd. | Collimating light guide plate, diffusing unit, and display apparatus employing the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI315007B (en) * | 2004-07-15 | 2009-09-21 | United Microelectronics Corp | Liquid crystal display panel |
-
2012
- 2012-04-24 TW TW101114566A patent/TWI465805B/en not_active IP Right Cessation
- 2012-08-02 CN CN201210273442.4A patent/CN102819142B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030164914A1 (en) * | 1993-12-21 | 2003-09-04 | 3M Innovative Properties Company | Brightness enhancing reflective polarizer |
| US7391568B2 (en) * | 1998-07-10 | 2008-06-24 | Hitachi, Ltd. | Luminous intensity distribution control device and display having the same |
| US6469755B1 (en) * | 1998-10-29 | 2002-10-22 | Hitachi, Ltd. | Illuminating arrangement with reflector having inclined irregularities or corrugations |
| CN1454329A (en) * | 2000-04-18 | 2003-11-05 | 3M创新有限公司 | Transflective display with non-inverting image |
| CN1934468A (en) * | 2004-03-22 | 2007-03-21 | 日东电工株式会社 | Circularly polarizing plate, optical film and image display |
| US20080106689A1 (en) * | 2004-08-31 | 2008-05-08 | Iichiro Inoue | Display Element And Display Device |
| CN1945403A (en) * | 2005-10-05 | 2007-04-11 | 精工爱普生株式会社 | Image display device |
| US20070085946A1 (en) * | 2005-10-13 | 2007-04-19 | Lg.Philips Lcd Co., Ltd. | Liquid crystal display device and method of fabricating the same |
| US20090027591A1 (en) * | 2007-07-27 | 2009-01-29 | Samsung Electronics Co., Ltd. | Collimating light guide plate, diffusing unit, and display apparatus employing the same |
| CN101354435A (en) * | 2008-09-05 | 2009-01-28 | 清华大学 | Self-positioning method of sensor network node based on distance size ordinal relation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842927A (en) * | 2016-06-01 | 2016-08-10 | 京东方科技集团股份有限公司 | Display panel and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102819142B (en) | 2015-05-13 |
| TW201344300A (en) | 2013-11-01 |
| TWI465805B (en) | 2014-12-21 |
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