CN109031787A - A kind of front located light source and display device - Google Patents
A kind of front located light source and display device Download PDFInfo
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- CN109031787A CN109031787A CN201811012800.XA CN201811012800A CN109031787A CN 109031787 A CN109031787 A CN 109031787A CN 201811012800 A CN201811012800 A CN 201811012800A CN 109031787 A CN109031787 A CN 109031787A
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- light
- guide plate
- light guide
- liquid crystal
- polarised
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- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 71
- 208000033748 Device issues Diseases 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims description 28
- 230000009977 dual effect Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 7
- 230000010287 polarization Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 230000005684 electric field Effects 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0026—Wavelength selective element, sheet or layer, e.g. filter or grating
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0056—Means for improving the coupling-out of light from the light guide for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13793—Blue phases
Abstract
The present invention provides a kind of front located light source and display devices, are related to field of display technology.The present invention is by being arranged luminescent device in light guide plate incidence surface side, first polarizer is set between light guide plate incidence surface and luminescent device, the first polarised light is converted by the light that luminescent device issues and is incident to light guide plate, liquid crystal light modulation film is arranged in side inside light guide plate far from light-emitting surface, the second polarised light is converted by the first polarised light, in light guide plate light-emitting surface side, the second polarizer is set, so that the first polarised light can not go out be shot out from light guide plate light-emitting surface, and pass through the second polarised light of liquid crystal light modulation film conversion, display panel can be incident to from the opposite side of light guide plate light-emitting surface, second polarised light is reflected through display panel, it carries colour information and is again introduced into light guide plate, and it is emitted from the light-emitting surface of light guide plate, its transmitance is higher, so that in the case where no environment light, the brightness of luminescent device sending can be reduced, to Power consumption is reduced, and contrast can be improved.
Description
Technical field
The present invention relates to field of display technology, more particularly to a kind of front located light source and display device.
Background technique
With the continuous development of display technology, the requirement to the power consumption of display device and image quality is also higher and higher, passes
The display device of system is all made of transmission type LCD (Liquid Crystal Display, liquid crystal display), i.e., in display panel
Backlight is arranged in lower section, and the light that backlight issues passes through layer-by-layer loss, finally there was only 5% through the transmitance of display panel
Left and right, causes the loss of most of power consumption, the appearance of reflective LCD and Transflective LCD can considerably reduce liquid crystal
The power consumption of display.
Wherein, reflective LCD is that side increases front located light source using reflection type array substrate, and on a display panel, is being had
In the case where environment light, the reading of information is directly realized using environment light, in the case where no environment light, by front located light source
Luminescent device emit beam, light is incident in display panel through the light guide plate again, by reflection type array substrate by incident light
Line reflection is gone out, and the light reflected away carries colour information；Transflective LCD is that backlight is arranged below display panel
Transflective layer is arranged in source between backlight and display panel, in the case where there is environment light, is directly realized using environment light
The reading of information is emitted beam in the case where no environment light by backlight, successively passes through transflective layer and display panel
Transmission is gone out.
But for reflective LCD, in the case where no environment light, the light that front located light source issues can be directly from leading
The light-emitting surface of tabula rasa is emitted, these light do not carry colour information, can seriously affect the contrast of reflective LCD；For semi-transparent
Half-reflection LCD, in the case where no environment light, when the light that backlight issues passes through transflective layer, only some light
It can pass through, in order to which display device can normally be shown, then the light luminance for increasing backlight sending be needed therefore to will lead to power consumption
Increase.
Summary of the invention
The present invention provides a kind of front located light source and display device, low to solve existing reflective LCD contrast, and semi-transparent half
The high problem of trans- LCD power consumption.
To solve the above-mentioned problems, the invention discloses a kind of front located light sources, comprising: light guide plate is arranged in the leaded light
The first polarizer between the light guide plate incidence surface and the luminescent device is arranged in the luminescent device of plate incidence surface side,
And the second polarizer of light guide plate light-emitting surface side is set；
First polarizer is configured be to convert the first polarised light for the light that the luminescent device issues
And it is incident to the light guide plate；
Side inside the light guide plate far from the light-emitting surface is provided with liquid crystal light modulation film, the liquid crystal light modulation film, quilt
It is configured to convert the second polarised light for first polarised light；
Wherein, second polarizer is configured as that second polarised light is allowed to pass through, and does not allow described first
Polarised light passes through.
Preferably, the liquid crystal light modulation film includes the first electrode layer being oppositely arranged and the second electrode lay, and setting exists
Liquid crystal site between the first electrode layer and the second electrode lay.
Preferably, the first electrode layer includes multiple first electrodes arranged in the first direction, the second electrode lay
Including multiple second electrodes arranged in a second direction, and the first direction and the second direction are mutually perpendicular to.
Preferably, the liquid crystal site is blue phase liquid crystal site.
Preferably, first polarizer and second polarizer are dual brightness enhancement film.
Preferably, first polarised light is P-polarized light, and second polarised light is S polarized light.
To solve the above-mentioned problems, the invention also discloses a kind of display devices, including above-mentioned front located light source.
Preferably, the display device further includes being successively set on the light guide plate with the light-emitting surface opposite side
Polaroid, scattering film, color membrane substrates, liquid crystal layer and array substrate, the array substrate are reflection type array substrate.
Preferably, the polaroid is consistent with the transmission axis of the second polarizing device.
Compared with prior art, the present invention includes the following advantages:
By the way that luminescent device is arranged in light guide plate incidence surface side, it is arranged first between light guide plate incidence surface and luminescent device
Polarizer converts the first polarised light for the light that luminescent device issues and is incident to light guide plate, separate inside light guide plate
The side of light-emitting surface is provided with liquid crystal light modulation film, converts the second polarised light for the first polarised light, sets in light guide plate light-emitting surface side
The second polarizer is set, so that can not go out be shot out from light guide plate light-emitting surface into the first polarised light in light guide plate, and be passed through
Second polarised light of liquid crystal light modulation film conversion, can be incident in display panel from the opposite side of light guide plate light-emitting surface, the second polarization
Light is reflected through display panel, is carried colour information and is again introduced into light guide plate, and is emitted from the light-emitting surface of light guide plate, transmitance compared with
Height, so that the brightness of luminescent device sending can be reduced in the case where no environment light, so that power consumption is greatly lowered, and
Contrast can be improved.
Detailed description of the invention
Fig. 1 shows a kind of structural schematic diagram of front located light source of the embodiment of the present invention；
Fig. 2 shows the schematic illustrations of the raising contrast of the embodiment of the present invention；
Fig. 3 shows the structural schematic diagram of the liquid crystal light modulation film of the embodiment of the present invention.
Fig. 4 shows index path of embodiment of the present invention in the case where no environment light.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Embodiment one
Referring to Fig.1, a kind of structural schematic diagram of front located light source of the embodiment of the present invention is shown.
The embodiment of the invention provides a kind of front located light source, including light guide plate 11, setting 11 incidence surface side of light guide plate (such as
The first polarizer between 11 incidence surface a of light guide plate and luminescent device 12 is arranged in the luminescent device 12 of incidence surface a) in Fig. 1
Part 13, and be arranged in 11 light-emitting surface side of light guide plate (the second polarizer 14 of light-emitting surface b) as shown in figure 1.
First polarizer 13 is configured as converting the first polarised light for the light that luminescent device 12 issues and be incident to
Light guide plate 11；11 inside of light guide plate is provided with liquid crystal light modulation film (not shown in FIG. 1), liquid crystal tune far from the side of light-emitting surface b
Light film is configured to convert the second polarised light for the first polarised light；Wherein, the second polarizer 14 is configured as allowing
Second polarised light passes through, and the first polarised light is not allowed to pass through.
It should be noted that a is the incidence surface of light guide plate 11, b is the light-emitting surface of light guide plate 11, and c is light guide plate light-emitting surface
Opposite side be arranged in light guide plate 11 by the way that side of the inside of light guide plate 11 far from light-emitting surface b is arranged in liquid crystal light modulation film
The internal opposite side c close to light-emitting surface b, so that into the first polarised light inside light guide plate 11 after liquid crystal light modulation film, no
The second polarised light only is converted by the first polarised light, it is also possible that opposite side c of second polarised light from 11 light-emitting surface b of light guide plate
It is shot out out.
Referring to Fig. 2, the schematic illustration of the raising contrast of the embodiment of the present invention is shown.
After the light that luminescent device 12 issues is incident to light guide plate 11, light can be from the light-emitting surface b and leaded light of light guide plate 11
The opposite side c of 11 light-emitting surface b of plate goes out to be shot out, it is assumed that going out the brightness being shot out from the light-emitting surface b of light guide plate 11 is F, no
Any colour information is carried, it is M that the brightness being shot out is gone out from the opposite side c of 11 light-emitting surface b of light guide plate, can be incident to aobvious
Show in panel 20, incident ray is reflexed to light guide plate 11 by display panel 20, and the light reflected away carries colour information, false
If the brightness for reflexing to the light of light guide plate 11 is N, the light reflexed in light guide plate 11 can be from the light-emitting surface b of light guide plate 11
It is shot out out, it is assumed that it is P that the light reflexed in light guide plate 11, which goes out the brightness being shot out from the light-emitting surface b of light guide plate 11,；Its
In, the reflectivity R of the brightness N and brightness M and display panel 20 that reflex to the light of light guide plate 11 are related, i.e. N=M × R,
And the transmitance T-phase of brightness P and brightness N and light guide plate 11 is closed, i.e. P=N × T=M × R × T, goes out light from light guide plate 11
Face b goes out the brightness P being shot out and carries colour information.
The then contrast of display device are as follows:
Wherein, CR (Contrast, contrast) is the contrast of display device, L255Indicate light when gray scale is 255
Degree, L0Indicate brightness when gray scale is 0, RIt is brightIndicate that display panel 20 is in the reflectivity under illuminated state, RSecretlyIndicate display panel
20 reflectivity under dark-state, T indicate the transmitance of light guide plate 11.
As can be seen that when reducing F, the splitting ratio for improving light guide plate 11 is the comparison that display device can be improved when increasing M
Degree.
In embodiments of the present invention, by the way that the first polarizer is arranged between 11 incidence surface a of light guide plate and luminescent device 12
Part 13, the light that luminescent device 12 issues are incident to the first polarizer 13, and the first polarizer 13 issues luminescent device 12
Light be converted into the first polarised light and be incident to light guide plate 11, be provided in the inside of light guide plate 11 far from the side of light-emitting surface b
Liquid crystal light modulation film can convert the second polarised light for the first polarised light, and the second polarizer is arranged in 11 side light-emitting surface b of light guide plate
Part 14 so that can not go out be shot out from 11 light-emitting surface b of light guide plate into the first polarised light in light guide plate 11, and passes through liquid crystal tune
Second polarised light of light film conversion, can be incident in display panel 20 from the opposite side c of 11 light-emitting surface b of light guide plate, therefore, pass through
Second polarizer 14, so that can not go out be shot out from 11 light-emitting surface b of light guide plate into the first polarised light in light guide plate 11, i.e.,
It reduces from the light-emitting surface b of light guide plate 11 and goes out the brightness F being shot out, increase and go out from the opposite side c of 11 light-emitting surface b of light guide plate
The brightness M being shot out, improves the contrast of display device.
In addition, the second polarised light is incident in display panel 20 from the opposite side c of 11 light-emitting surface b of light guide plate, the second polarization
Light is reflected through display panel 20, is carried colour information and is again introduced into light guide plate 11, and is emitted from the light-emitting surface b of light guide plate 11,
Transmitance is higher, so that the brightness of the sending of luminescent device 12 can be reduced, to significantly drop in the case where no environment light
Low-power consumption.
Referring to Fig. 3, the structural schematic diagram of the liquid crystal light modulation film of the embodiment of the present invention is shown.
In embodiments of the present invention, liquid crystal light modulation film includes the first electrode layer 112 being oppositely arranged and the second electrode lay
113, and the liquid crystal site 111 (not shown in FIG. 3) being arranged between first electrode layer 112 and the second electrode lay 113.
Wherein, first electrode layer 112 includes multiple first electrodes 1121 arranged in the first direction, the second electrode lay 113
Including multiple second electrodes 1131 arranged in a second direction, and first direction and second direction are mutually perpendicular to；Liquid crystal site 111
For blue phase liquid crystal site.
It should be noted that second electrode 1131 is arranged along the vertical direction when first electrode 1121 arranges in the horizontal direction
Column, when first electrode 1121 arranges along the vertical direction, second electrode 1131 arranges in the horizontal direction.
When between first electrode layer 112 and the second electrode lay 113 without applying electric field, liquid crystal site 111 is in non-work
Make state, be transparent state, and does not change the polarization state of light；By being applied between first electrode layer 112 and the second electrode lay 113
Added electric field, according to the electric field level of application, controls the deflection angle of liquid crystal site 111 so that liquid crystal site 111 is in running order
Degree, so that the polarization state for being incident on the light of liquid crystal site 111 changes.
During actual fabrication, liquid crystal light modulation film can be placed in light guide plate injection mold cavity, due to waving for blue phase liquid crystal
Hair point is greater than 300 DEG C, and much higher than the injection temperature of light guide plate, and the thickness of liquid crystal light modulation film is at 200 μm or so, lower than generally leading
Therefore the thickness of tabula rasa can directly adopt Shooting Technique, be molded to form liquid far from the side of light-emitting surface b in 11 inside of light guide plate
Brilliant light modulation film；Alternatively, liquid crystal light modulation film is placed in a space, light guide plate is printed using 3D printing technique, so that the leaded light
Intralamellar part is provided with liquid crystal light modulation film far from the side of light-emitting surface b.
In embodiments of the present invention, it is 50% to 100% that the first polarised light, which is converted into the conversion ratio of the second polarised light,.
Referring to Fig. 4, index path of embodiment of the present invention in the case where no environment light is shown.
The light that luminescent device 12 issues is incident to the first polarizer 13, and the first polarizer 13 sends out luminescent device 12
Light out is converted into the first polarised light and is incident to light guide plate 11, at this point, the light g1 in Fig. 4 indicates the first polarised light, enters
When being incident upon the first polarised light in light guide plate 11 without liquid crystal site 111, process be light guide plate 11 PC
(Polycarbonate, polycarbonate) matrix, will not change the polarization state of the first polarised light, go out to the light-emitting surface b of light guide plate 11
It penetrates, but since the second polarizer 14 is arranged in 11 side light-emitting surface b of light guide plate, only the second polarised light is allowed to pass through, and do not permit
Perhaps the first polarised light passes through, so that the first polarised light is reflected, again passes by liquid crystal site 111, that is, may make the first polarised light
The second polarised light is converted by liquid crystal site 111.
By controlling the electric field level applied between first electrode layer 112 and the second electrode lay 113, liquid crystal site is controlled
111 deflection angle, for example, may make and be incident in liquid crystal site 111 when the deflection angle of liquid crystal site 111 is 45 °
50% the first polarised light is converted into the second polarised light, i.e. the conversion ratio that the first polarised light is converted into the second polarised light is
The first polarised light and the second polarised light each account for 50% in 50%, light g2, and light g2 is incident to the phase of 11 light-emitting surface b of light guide plate
When the c of opposite side, by the polaroid 21 in display panel 20, the first polarised light is absorbed, and the second polarised light g3 can sequentially enter aobvious
Show that polaroid 21, scattering film 22, color membrane substrates 23, liquid crystal layer 24 and the array substrate 25 of panel 20, array substrate 25 are reflection
Formula array substrate, the second polarised light for being incident to array substrate 25 are reflected by array substrate 25, again pass by liquid crystal layer 24, color film
Substrate 23, scattering film 22 and polaroid 21 enter in light guide plate 11, and carry colour information, reflex to the in light guide plate 11
Project light guide plate 11 in the region of two polarised lights never liquid crystal site 111.
It is available according to normal state randomness, when the conversion ratio that the first polarised light is converted into the second polarised light is 50%,
The first polarised light in light g2 after conversion can be absorbed by polaroid 21, then the transmitance of theoretical glazed thread is 50%, and is showed
The transmitance of some transmission type LCDs is 5% or so, and the transmitance of existing Transflective LCD is 2.5% or so, existing
The transmitance of reflective LCD is 25% or so, and therefore, the light penetration of the embodiment of the present invention is higher, so that in no environment
In the case where light, lower, usually less than 50nit (nit), to significantly drop is required to the brightness that luminescent device 12 issues
Low-power consumption.
It certainly, can also be by controlling the electric field level applied between first electrode layer 112 and the second electrode lay 113, control
The deflection angle of liquid crystal site 111 processed, so that the first polarised light being incident in liquid crystal site 111 is converted into the second polarised light
Conversion ratio is greater than 50%, even up to 100%.
For example, may make first be incident in liquid crystal site 111 partially when the deflection angle of liquid crystal site 111 is 90 °
Vibration light is completely converted into the second polarised light, i.e. the conversion ratio that the first polarised light is converted into the second polarised light is 100%, i.e. Fig. 4
In light g2 be all the second polarised light, the second polarised light is successively incident to display surface from the opposite side c of 11 light-emitting surface b of light guide plate
Polaroid 21, scattering film 22, color membrane substrates 23, liquid crystal layer 24 and the array substrate 25 of plate 20, are reflected, again by array substrate 25
Enter in light guide plate 11 by liquid crystal layer 24, color membrane substrates 23, scattering film 22 and polaroid 21, and carry colour information, instead
Project light guide plate 11 in the region for being incident upon the second polarised light never liquid crystal site 111 in light guide plate 11.
Therefore, when the conversion ratio that the first polarised light being incident in liquid crystal site 111 is converted into the second polarised light is
When 100%, light penetration can further improve, and can also increase substantially contrast.
The above-mentioned course of work is carried out in the case where no environment light, and luminescent device 12 is needed to emit beam,
And apply electric field between first electrode layer 112 and the second electrode lay 113, control the deflection angle of liquid crystal site 111；When having
In the case where environment light, luminescent device 12 provides light without emitting beam, by environment light, and in first electrode layer 112 and the
Do not apply electric field between two electrode layers 113, so that liquid crystal site 111 is transparent state, does not change the light for being incident to liquid crystal site 111
The polarization state of line, therefore, the embodiment of the present invention do not influence in the case where no environment light, the display effect of display device.
Simultaneously as existing reflective LCD, light guide plate passes through OCA (Optical Clear Adhesive, optical cement)
It being bonded with display panel, optical cement can fill the site part on light guide plate, due to the refractive index close of optical cement and light guide plate,
Site then be will affect to the adjustment effect of light, the light being incident in display panel is reduced, influence display effect；And it is of the invention
Embodiment is that liquid crystal site 111 is arranged inside light guide plate 11, and light guide plate 11 and display panel 20 are being passed through optics sticker
When conjunction, it will not influence liquid crystal site 111 to the adjustment effect of light, the light being incident in display panel will not be reduced, from
And improve display effect.
Further, since first electrode layer 112 includes multiple first electrodes 1121 arranged in the first direction, the second electrode lay
113 include multiple second electrodes 1131 arranged in a second direction, and first direction and second direction are mutually perpendicular to, by the
Apply voltage between one electrode 1121 and second electrode 1131, can control 1131 intersection location of first electrode 1121 and second electrode
The deflection angle of the liquid crystal site 111 at place is realized local dimming (local dimming), root to change light propagation path
According to actual needs, different brightness is provided for different display areas.
In embodiments of the present invention, the first polarizer 13 and the second polarizer 14 are dual brightness enhancement film
(Dual Brightness Enhancement Film, DBEF).When first polarizer 13 is dual brightness enhancement film, no
The light that luminescent device 12 issues can only be converted to the first polarised light, the most light that also may make luminescent device 12 to issue
Across dual brightness enhancement film, the effect of blast is played；When the second polarizer 14 is dual brightness enhancement film, not only
It can play the role of that the second polarised light is allowed to pass through, and the first polarised light not allowed to pass through, also may make that most of second is inclined
The light that shakes passes through dual brightness enhancement film, plays the effect of blast.
Wherein, the first polarised light is P-polarized light, and the second polarised light is S polarized light, and certainly, the first polarised light can also be S
Polarised light, the second polarised light can also be P-polarized light.
In embodiments of the present invention, by the way that luminescent device is arranged in light guide plate incidence surface side, in light guide plate incidence surface and hair
First polarizer is set between optical device, convert the first polarised light for the light that luminescent device issues and is incident to leaded light
Plate, the side inside light guide plate far from light-emitting surface are provided with liquid crystal light modulation film, convert the second polarised light for the first polarised light,
The second polarizer is set in light guide plate light-emitting surface side, so that into the first polarised light in light guide plate light can not be gone out from light guide plate
Face goes out to be shot out, and passes through the second polarised light of liquid crystal light modulation film conversion, can be incident to from the opposite side of light guide plate light-emitting surface aobvious
Show in panel, the second polarised light is reflected through display panel, is carried colour information and is again introduced into light guide plate, and goes out light from light guide plate
Face outgoing, transmitance is higher, so that the brightness of luminescent device sending can be reduced in the case where no environment light, thus
Power consumption is greatly lowered, and contrast can be improved.
Embodiment two
The embodiment of the invention provides a kind of display devices, including above-mentioned front located light source.
In embodiments of the present invention, display device further include be successively set on light guide plate 11 with light-emitting surface b opposite side c
Polaroid 21, scattering film 22, color membrane substrates 23, liquid crystal layer 24 and array substrate 25, array substrate 25 be reflection type array base
Plate；Wherein, polaroid 21 is consistent with the transmission axis of the second polarizing device 14.
Display panel 20 includes above-mentioned polaroid 21, scattering film 22, color membrane substrates 23, liquid crystal layer 24 and array substrate
25, reflecting layer can be set on general array substrate to form reflection type array substrate；By display panel 20 and preposition
When assembling optical sources form display device, display panel 20 and front located light source can be bonded by glue frame.
Polaroid 21 is consistent with the transmission axis of the second polarizing device 14, it is, when the second polarizing device 14 allows to pass through S
Polarised light, when not allowing P-polarized light to pass through, polaroid 21 also allows not allow P-polarized light to pass through, when second by S polarized light
Polarizing device 14 allows through P-polarized light, and when not allowing S polarized light to pass through, polaroid 21 also allows not permit by P-polarized light
Perhaps S polarized light passes through.
In addition, be referred to the description of embodiment one about the specific descriptions of front located light source, the embodiment of the present invention to this not
It repeats again.
In embodiments of the present invention, display device includes front located light source, by the way that photophore is arranged in light guide plate incidence surface side
The first polarizer is arranged in part between light guide plate incidence surface and luminescent device, converts for the light that luminescent device issues
One polarised light is simultaneously incident to light guide plate, and the side inside light guide plate far from light-emitting surface is provided with liquid crystal light modulation film, partially by first
Vibration light is converted into the second polarised light, the second polarizer is arranged in light guide plate light-emitting surface side, so that into first in light guide plate
Polarised light can not go out be shot out from light guide plate light-emitting surface, and pass through the second polarised light of liquid crystal light modulation film conversion, can be from light guide plate
The opposite side of light-emitting surface is incident in display panel, and the second polarised light is reflected through display panel, is carried colour information and is again introduced into
Light guide plate, and be emitted from the light-emitting surface of light guide plate, transmitance is higher, so that can reduce hair in the case where no environment light
The brightness that optical device issues, so that power consumption be greatly lowered, and can be improved contrast.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, commodity or the equipment that include a series of elements not only include that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, commodity or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in process, method, commodity or the equipment for including the element.
Above to a kind of front located light source provided by the present invention and display device, it is described in detail, it is used herein
A specific example illustrates the principle and implementation of the invention, and the above embodiments are only used to help understand
Method and its core concept of the invention；At the same time, for those skilled in the art is having according to the thought of the present invention
There will be changes in body embodiment and application range, in conclusion the content of the present specification should not be construed as to the present invention
Limitation.
Claims (9)
1. a kind of front located light source characterized by comprising the luminescent device of light guide plate incidence surface side is arranged in light guide plate,
The first polarizer between the light guide plate incidence surface and the luminescent device is set, and setting goes out in the light guide plate
Second polarizer of smooth surface side；
First polarizer is configured as converting the first polarised light for the light that the luminescent device issues and be incident to
The light guide plate；
Side inside the light guide plate far from the light-emitting surface is provided with liquid crystal light modulation film, and the liquid crystal light modulation film is configured
For the second polarised light can be converted by first polarised light；
Wherein, second polarizer is configured as that second polarised light is allowed to pass through, and does not allow first polarization
Light passes through.
2. front located light source according to claim 1, which is characterized in that the liquid crystal light modulation film includes first be oppositely arranged
Electrode layer and the second electrode lay, and the liquid crystal site being arranged between the first electrode layer and the second electrode lay.
3. front located light source according to claim 2, which is characterized in that the first electrode layer includes multiple along first direction
The first electrode of arrangement, the second electrode lay include multiple second electrodes arranged in a second direction, and the first direction
It is mutually perpendicular to the second direction.
4. front located light source according to claim 2, which is characterized in that the liquid crystal site is blue phase liquid crystal site.
5. front located light source according to claim 1, which is characterized in that first polarizer and second polarizer
Part is dual brightness enhancement film.
6. front located light source according to claim 1, which is characterized in that first polarised light be P-polarized light, described second
Polarised light is S polarized light.
7. a kind of display device, which is characterized in that including front located light source such as of any of claims 1-6.
8. display device according to claim 7, which is characterized in that the display device further include be successively set on it is described
Polaroid, scattering film, color membrane substrates, liquid crystal layer and the array substrate with the light-emitting surface opposite side of light guide plate, the battle array
Column substrate is reflection type array substrate.
9. display device according to claim 8, which is characterized in that the transmission axis of the polaroid and the second polarizing device
Unanimously.
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| CN201811012800.XA CN109031787A (en) | 2018-08-31 | 2018-08-31 | A kind of front located light source and display device |
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| CN201811012800.XA CN109031787A (en) | 2018-08-31 | 2018-08-31 | A kind of front located light source and display device |
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| CN109683230A (en) * | 2019-02-18 | 2019-04-26 | 京东方科技集团股份有限公司 | The manufacturing method of light guide structure, transparent display, light guide structure |
| CN111736254A (en) * | 2020-07-24 | 2020-10-02 | 京东方科技集团股份有限公司 | Display device and preparation method thereof |
| CN112394571A (en) * | 2019-08-19 | 2021-02-23 | 苏州大学 | Front light module and liquid crystal display system with same |
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Application publication date: 20181218 |