CN106019716A - Backlight source and driving method and display device thereof - Google Patents
Backlight source and driving method and display device thereof Download PDFInfo
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- CN106019716A CN106019716A CN201610615674.1A CN201610615674A CN106019716A CN 106019716 A CN106019716 A CN 106019716A CN 201610615674 A CN201610615674 A CN 201610615674A CN 106019716 A CN106019716 A CN 106019716A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
-
- 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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- 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
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
-
- 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
- G02F1/15—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 an electrochromic effect
- G02F1/153—Constructional details
- G02F1/155—Electrodes
-
- 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
- G02F1/15—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 an electrochromic effect
- G02F1/163—Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Geometry (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a backlight source and a driving method and display device thereof, and belongs to the field of displayers. The backlight source comprises a lattice-point-free light guide plate, an adjustable-transparency diffusion layer arranged on the first surface of the lattice-point-free light guide plate, an adjustable-transparency lattice point layer, an adjustable-transparency reflecting layer and a light source arranged at one side of the lattice-point-free light guide plate, wherein the adjustable-transparency lattice point layer and the adjustable-transparency reflecting layer are sequentially arranged on the second surface of the lattice-point-free light guide plate, the first surface and the second surface are two opposite surfaces of the lattice-point-free light guide plate, and the adjustable-transparency diffusion layer, the adjustable-transparency lattice point layer and the adjustable-transparency reflecting layer can be in a transparent or opaque state. The adjustable-transparency diffusion layer, the adjustable-transparency lattice point layer and the adjustable-transparency reflecting layer are made to be in the transparent state through electric control, so that the transparent display device is obtained; the diffusion layer and the reflecting layer made of an adjustable-transparency material are thinner than an existing diffusion sheet and an existing reflecting sheet, the thickness of the backlight source can be reduced, and therefore the thickness of the display device is reduced.
Description
Technical field
The present invention relates to field of display, particularly to a kind of backlight and driving method, display device.
Background technology
Along with the continuous progress of Display Technique, occur in that a kind of new Display Technique Transparence Display technology.
When the display using Transparence Display technology does not works, user can be clear that position through this display
In its scenery behind, transparent appearance that this display is had because of it just and obtain more and more people
Favor, be increasingly becoming Display Technique development trend.
At present, Transparence Display many employings Organic Light Emitting Diode (Organic Light-Emitting Diode, letter
Claim OLED) technology realization.And another kind of common Display Technique lcd technology the most also cannot realize
Transparence Display, concrete reason is as follows: use liquid crystal display (the Liquid Crystal that lcd technology realizes
Display, is called for short LCD) generally include the structures such as liquid crystal panel, upper and lower polaroid and backlight；Wherein,
Backlight includes light guide plate, the diffusion sheet being arranged on light guide plate two sides and reflector plate and is arranged on light guide plate
The light source of side, light guide plate is provided with site near the one side of reflector plate, and the light of light source injection is through light guide plate
Site light gathering reflector is to diffusion sheet, then by diffusion sheet diffusion injection, the effect of reflector plate is that light guide plate is saturating
The luminous reflectance gone out returns light guide plate, owing to above-mentioned site, reflector plate and diffusion sheet are all opaque, therefore without
Method makes Transparence Display device.
Summary of the invention
In order to solve there is presently no the problem of the LCD of Transparence Display function, embodiments provide one
Plant backlight and driving method, display device.Described technical scheme is as follows:
First aspect, embodiments provides a kind of backlight, and described backlight includes: lead without site
Tabula rasa；It is arranged on described without the adjustable diffusion layer of the transparency on the first surface of dot light guide plate；Set gradually
Described without the adjustable site layer of the transparency on the second surface of dot light guide plate with transparency regulating reflection layer；
And it is arranged on the light source of described side without dot light guide plate；Wherein, described first surface and described second table
Face is the described two contrary surfaces without dot light guide plate, described transparency is adjustable diffusion layer, described transparency
The state of adjustable site layer and described transparency regulating reflection layer all includes: pellucidity and opaque state.
In a kind of implementation of the embodiment of the present invention, described transparency is adjustable, and site layer includes that first is transparent
Upper electrode, multiple first transparent bottom electrodes of matrix arrangement, it is arranged on described first transparent upper electrode and described
Between multiple first transparent bottom electrodes and with the plurality of first transparent bottom electrode one_to_one corresponding arrange multiple
Lightness can adjustable block and with multiple first transparent bottom electrode one_to_one corresponding arrange multiple thin film transistor (TFT) TFT,
The drain electrode of described TFT and corresponding described first transparent bottom electrode electrical connection.
In the another kind of implementation of the embodiment of the present invention, described transparency can adjustable block be liquid crystal block or electroluminescent
Variable color block.
In the another kind of implementation of the embodiment of the present invention, each described electrochromism block includes being arranged on institute
State the ion conductive layer on the first transparent bottom electrode and the electrochromic layer being arranged on described ion conductive layer.
In the another kind of implementation of the embodiment of the present invention, described transparency is adjustable, and site layer also includes arranging
At described first transparent upper electrode and described without the transparent viscose glue protective layer between dot light guide plate.
In the another kind of implementation of the embodiment of the present invention, described transparency is adjustable, and site layer also includes arranging
Insulating protective layer between described first transparent bottom electrode and described transparency regulating reflection layer.
In the another kind of implementation of the embodiment of the present invention, described transparency is adjustable, and diffusion layer includes setting successively
Put that the transparent bottom electrode of second on the first surface, transparency is adjustable diffusion sublayer and second are transparent to power on
Pole.
In the another kind of implementation of the embodiment of the present invention, diffusion sublayer that described transparency is adjustable is liquid crystal layer
Or electrochromic layer.
In the another kind of implementation of the embodiment of the present invention, described transparency regulating reflection layer includes setting successively
Put the 3rd transparent upper electrode on the layer of described transparency adjustable site, transparency regulating reflection sublayer and the 3rd
Transparent bottom electrode.
In the another kind of implementation of the embodiment of the present invention, described transparency regulating reflection sublayer is liquid crystal layer
Or electrochromic layer.
In the another kind of implementation of the embodiment of the present invention, described backlight also includes drive circuit, described
Drive circuit, for when described backlight works, controls the adjustable diffusion layer of described transparency, described transparency
At least some of site and described transparency regulating reflection layer in the layer of adjustable site are in opaque state；?
When described backlight does not works, control the adjustable diffusion layer of described transparency, described transparency is adjustable site layer and
Described transparency regulating reflection layer is in pellucidity.
In the another kind of implementation of the embodiment of the present invention, described transparency is adjustable diffusion layer, described transparent
The state spending adjustable site layer and described transparency regulating reflection layer also includes: translucent, described driving
Circuit is additionally operable in the work of described backlight or when not working, and controls the adjustable diffusion layer of described transparency, described
At least one in transparency is adjustable site layer and described transparency regulating reflection layer is in translucent.
In the another kind of implementation of the embodiment of the present invention, described backlight also includes transparency carrier and fixes
Spacing plastic frame on described transparency carrier, described without dot light guide plate, described transparency is adjustable diffusion layer,
Described transparency is adjustable site layer, described transparency regulating reflection layer and described light source are arranged on described spacing mould
Between glue frame and described transparency carrier.
Second aspect, the embodiment of the present invention additionally provides a kind of display device, and described display device includes first
Backlight described in aspect.
In a kind of implementation of the embodiment of the present invention, described display device also includes being successively set on described
Lower polaroid, liquid crystal panel and upper polaroid on the exiting surface of backlight.
In the another kind of implementation of the embodiment of the present invention, described liquid crystal panel is twisted-nematic TN type liquid crystal
Panel.
The third aspect, the embodiment of the present invention additionally provides a kind of backlight drive method, is used for driving first party
Backlight described in face, described method includes:
When described backlight works, control the adjustable diffusion layer of described transparency, described transparency is adjustable site
At least some of site and described transparency regulating reflection layer in Ceng are in opaque state；
When described backlight does not works, control the adjustable diffusion layer of described transparency, described transparency is adjustable net
Point layer and described transparency regulating reflection layer are in pellucidity.
In a kind of implementation of the embodiment of the present invention, when described backlight works, control described transparent
At least some of site spent in the layer of adjustable site is in opaque state, including:
When the pixel electrode of the pixel on the liquid crystal panel of site correspondence position powers on and is pressed in the range of first,
Control described site and be in opaque state；
When the pixel electrode of the pixel on the liquid crystal panel of site correspondence position powers on and is pressed in the range of second,
Control described site and be in pellucidity.
In the another kind of implementation of the embodiment of the present invention, described method also includes: in described backlight work
Make or when not working, control the adjustable diffusion layer of described transparency, described transparency is adjustable site layer and described
At least one in lightness regulating reflection layer is in translucent.
The technical scheme that the embodiment of the present invention provides has the benefit that
The present invention is by arranging the adjustable diffusion layer of transparency, transparency is adjustable site layer and transparency regulating reflection
Layer so that during backlight work, can make the adjustable diffusion layer of transparency, transparency is adjustable site by automatically controlled
At least some of site in Ceng and transparency regulating reflection layer are in opaque state, thus realize diffusion layer,
Light guide plate mesh point and the effect in reflecting layer, and when backlight does not works, can make the transparency can by automatically controlled
Adjust diffusion layer, transparency is adjustable site layer and transparency regulating reflection layer to be in pellucidity, thus realize thoroughly
Substantially showing device；It addition, the diffusion layer that transparency material with adjustable is made compares existing diffusion sheet with reflecting layer
And reflector plate, thickness is less, thus can reduce the thickness of backlight, thus reduces display device thickness.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, institute in embodiment being described below
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of backlight that the embodiment of the present invention provides；
Fig. 2 a is the structural representation of the transparency adjustable site layer that the embodiment of the present invention provides；
Fig. 2 b is the structural representation of the electrochromism block that the embodiment of the present invention provides；
Fig. 3 is the structural representation of the adjustable diffusion layer of transparency that the embodiment of the present invention provides；
Fig. 4 is the structural representation of the transparency regulating reflection layer that the embodiment of the present invention provides；
Fig. 5 a is the structural representation of the another kind of backlight that the embodiment of the present invention provides；
Fig. 5 b is the structural representation of the another kind of backlight that the embodiment of the present invention provides；
Fig. 6 is the structural representation of a kind of display device that the embodiment of the present invention provides；
Fig. 7 is the structural representation of the another kind of display device that the embodiment of the present invention provides；
Fig. 8 is the flow chart of a kind of backlight drive method that the embodiment of the present invention also provides for.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Embodiment is described in further detail.
Fig. 1 is the structural representation of a kind of backlight that the embodiment of the present invention provides, and sees Fig. 1, backlight
10 include: without dot light guide plate 11；The transparency being arranged on the first surface without dot light guide plate 11 can
Adjust diffusion layer 12；The transparency adjustable site layer being successively set on the second surface without dot light guide plate 11
13 and transparency regulating reflection layer 14；And it is arranged on the light source 15 without dot light guide plate 11 side；Wherein,
First surface and second surface are the two contrary surfaces without dot light guide plate 11, transparency is adjustable diffusion layer 12,
The state of transparency is adjustable site layer 13 and transparency regulating reflection layer 14 all includes: pellucidity and impermeable
Bright state.
Wherein, the adjustable diffusion layer of transparency 12, transparency is adjustable site layer 13 and transparency regulating reflection layer
The state of 14 refers to, transparency is adjustable diffusion layer 12, transparency is adjustable site layer 13 and transparency are adjustable instead
Penetrate the size of the light transmittance of the state of layer 14；Light transmittance is 1 or (less than 1, and in certain limit close to 1
In) time, the light transmittance of the state of transparency is adjustable site layer 13 and transparency regulating reflection layer 14 is in
Bright state, light transmittance is 0 or during close to 0, transparency is adjustable site layer 13 and transparency regulating reflection layer 14
The light transmittance of state be in opaque state.
Wherein, by control can to the adjustable diffusion layer of transparency 12, transparency is adjustable site layer 13 and transparency
Adjust the voltage that reflecting layer 14 applies, control the adjustable diffusion layer of transparency 12, transparency is adjustable site layer 13 and
The transparency of transparency regulating reflection layer 14, specifically may refer to be hereinafter described.
The embodiment of the present invention is by arranging the adjustable diffusion layer of transparency 12, transparency is adjustable site layer 13 and transparent
Degree regulating reflection layer 14 so that when backlight 10 works, can make the adjustable diffusion layer of transparency by automatically controlled
12, at least some of site in transparency adjustable site layer 13 and transparency regulating reflection layer 14 are in not
Pellucidity, thus realize the effect in diffusion layer, light guide plate mesh point and reflecting layer, and in backlight 10 not work
When making, can make the adjustable diffusion layer of transparency 12, transparency is adjustable site layer 13 and the transparency can by automatically controlled
Adjust reflecting layer 14 to be in pellucidity, thus realize transparent display；It addition, transparency material with adjustable system
The diffusion layer become compares existing diffusion sheet and reflector plate with reflecting layer, and thickness is less, thus can reduce the back of the body
The thickness of light source 10, thus reduce display device thickness.
Wherein, backlight 10 work refer to backlight can for display device provide backlight, from but display dress
Put and normally show；Backlight 10 does not work and refers to that backlight does not provides backlight, display dress for display device
Put and do not show.
Fig. 2 a is the structural representation of the transparency adjustable site layer 13 that the embodiment of the present invention provides, and sees figure
2a, transparency is adjustable site layer 13 includes the first transparent upper electrode 131, matrix arrangement multiple first transparent
Bottom electrode 132, it is arranged between the first transparent upper electrode 131 and multiple first transparent bottom electrode 132 and with many
Multiple transparencys that individual first transparent bottom electrode 132 one_to_one corresponding is arranged can adjustable block 133 and with multiple first
(Thin Film Transistor is called for short multiple thin film transistor (TFT)s that transparent bottom electrode 132 one_to_one corresponding is arranged
The drain electrode of TFT) 134, TFT 134 electrically connects with the first corresponding transparent bottom electrode 132.
In embodiments of the present invention, TFT 134 includes setting gradually grid, gate insulator, indium gallium zinc oxygen
Compound (Indium Gallium Zinc Oxide is called for short IGZO) layer, source electrode and drain electrode.TFT 134 each
Film layer is due to the thinnest so that TFT 134 presents the transparent or state of higher light transmittance.The leakage of TFT 134
Pole electrically connects with the first transparent bottom electrode 132, and the grid of TFT 134 electrically connects with gate line, TFT's 134
Source electrode electrically connects with source electrode line, and the source electrode line of TFT 134 is used for providing voltage for the first transparent bottom electrode 132,
The gate line of TFT 134 is used for providing grid control signal, thus controls TFT 134 and be turned on or off.
The transparent and opaque of each site can be realized respectively by controlling TFT 134 such that it is able to according to
The display of display device, sets the intensity that diverse location on site is reflective, strengthens picture display effect；Its
Secondary, TFT 134 is little due to thickness, and light transmittance is high, does not interferes with the properties of transparency of backlight 10.
Wherein, the first transparent upper electrode 131 and the first transparent bottom electrode 132 include but not limited to tin indium oxide
(Indium Tin Oxide is called for short ITO) electrode or indium zinc oxide (Indium Zinc Oxide is called for short IZO)
Electrode.
Transparency adjustable block 133 and the first transparent bottom electrode 132 can all can be designed as rectangle, consequently facilitating cloth
Putting and make, transparency can the shape of adjustable block 133 and the first transparent bottom electrode 132 can also be other shapes,
Such as rhombus, circle, trapezoidal etc..
Wherein, transparency can adjustable block 133 can be liquid crystal block or electrochromism block.Wherein, liquid crystal block is permissible
For bistable liquid crystal block or multistable state liquid srystal block, bistable liquid crystal block or multistable state liquid srystal block by powering up
Realize deflection, thus present transparency in various degree.Electrochromism block uses electrochromic material to make,
Electrochromic material presents different light transmittances (transparency) under DC Electric Field, and electrochromic material can
To be inorganic electrochromic material (such as Tungstic anhydride .) or organic electrochromic material (such as purple sieve essence class).
As shown in Figure 2 b, in embodiments of the present invention, each electrochromism block 133A includes being arranged on first
Ion conductive layer 133B on transparent bottom electrode 132 and the electrochromism being arranged on ion conductive layer 133B
Layer 133C.Ion conductive layer is combined with each other with electrochromic layer, and ion conductive layer can be electrochromic layer
Thering is provided hole, when electronics and hole simultaneously enter defective locations between electrochromic layer atomic lattice, variable color is opened
Begin, thus improve electrochromism block color change.
Alternatively, transparency adjustable site layer 13 can also include being arranged on the first transparent upper electrode 131 and nothing
Transparent viscose glue protective layer 135 between dot light guide plate 11, it is achieved transparency is adjustable site layer 13 and light guide plate
Between laminating.
Alternatively, transparency adjustable site layer 13 can also include being arranged on the first transparent bottom electrode 132 with saturating
Insulating protective layer 136 between lightness regulating reflection layer 14, it is to avoid contact short with transparency regulating reflection layer 14
Road.
Wherein, insulating protective layer 136 can be resin bed, strengthens light transmission while realizing insulation protection.
Transparency is adjustable, and site layer 13 can prepare in the following way: with insulating protective layer 136 as base material,
At deposited on substrates making gate line, source electrode line, TFT thin film transistor (TFT) and transparent upper and lower electrode layer, thoroughly
Bright viscose glue protective layer, wherein transparency can adjustable block 133 processing procedure substantially similar with TFT making technology.
Fig. 3 is the structural representation of the adjustable diffusion layer of transparency 12 that the embodiment of the present invention provides, and sees Fig. 3,
Transparency is adjustable, and diffusion layer 12 includes sets gradually the second transparent bottom electrode 121 on the first surface, transparent
Spend adjustable diffusion sublayer 122 and the second transparent upper electrode 123.By controlling upper/lower electrode voltage, control transparent
The light transmittance of degree tunable layer, it is achieved diffusion function；When backlight 10 does not works, it is possible to achieve Transparence Display.
Wherein, the adjustable diffusion sublayer of transparency 122 is liquid crystal layer or electrochromic layer.
Alternatively, the adjustable diffusion layer of this transparency 12 also includes being arranged on the second transparent bottom electrode 121 and second
Two-layer the first transparent insulation protecting film 124 of transparent upper electrode 123 both sides, for diffusion layer adjustable to transparency
12 carry out insulation protection.Wherein, the first transparent insulation protecting film 124 can be resin bed.
Fig. 4 is the structural representation of the transparency regulating reflection layer 14 that the embodiment of the present invention provides, and sees Fig. 4,
Transparency regulating reflection layer 14 includes that the be successively set on transparency adjustable site layer 13 the 3rd transparent powers on
Pole 141, transparency regulating reflection sublayer 142 and the 3rd transparent bottom electrode 143.By controlling upper/lower electrode electricity
Pressure, controls the light transmittance of transparency regulating reflection sublayer 142, it is achieved reflection function；In backlight 10 not work
When making, it is possible to achieve Transparence Display.
Wherein, transparency regulating reflection sublayer 142 is liquid crystal layer or electrochromic layer.
Alternatively, this transparency regulating reflection layer 14 also includes being arranged on the 3rd transparent upper electrode 141 and the 3rd
Two-layer the second transparent insulation protecting film 144 of transparent bottom electrode 143 both sides, for transparency regulating reflection layer
14 carry out insulation protection.Wherein, the second transparent insulation protecting film 144 can be resin bed.
Further, backlight 10 also includes drive circuit, and drive circuit is used for when backlight 10 works,
Control at least some of site in the adjustable diffusion layer of transparency 12, transparency is adjustable site layer 13 and transparency
Regulating reflection layer 14 is in opaque state；When backlight 10 does not works, control the adjustable diffusion of transparency
Layer 12, transparency is adjustable site layer 13 and transparency regulating reflection layer 14 are in pellucidity.By driving
Circuit realiration transparency adjustable control, when backlight 10 does not works, it is possible to achieve Transparence Display.
Further, the adjustable diffusion layer of transparency 12, transparency is adjustable site layer 13 and transparency regulating reflection
The state of layer 14 can also include: translucent, and drive circuit is additionally operable to work or not at backlight 10
During work, control the adjustable diffusion layer of transparency 12, transparency is adjustable site layer 13 and transparency regulating reflection layer
At least one in 14 is in translucent.Regulation backlight 10 is translucent, it is achieved the shape of backlight 10
State variation, thus meet the diversified demand of user.Translucent be between transparent and opaque between one
The state of kind, has certain light transmittance.
In embodiments of the present invention, light source 15 can be lamp bar, such as light-emitting diode light bar.
Fig. 5 a and Fig. 5 b is the structural representation of the another kind of backlight that the embodiment of the present invention provides, and Fig. 5 a
It is this backlight profile on width and length direction respectively with Fig. 5 b, the backlight phase provided with Fig. 1
Ratio, this backlight 10 also includes transparency carrier 16 and the spacing plastic frame 17 being fixed on transparency carrier 16,
Without dot light guide plate 11, transparency is adjustable diffusion layer 12, transparency is adjustable site layer 13, transparency is adjustable instead
Penetrate layer 14 and light source 15 is arranged between spacing plastic frame 17 and transparency carrier 16.Spacing plastic frame 17 energy
Enough realize carrying out para-position with backlight 10 during liquid crystal panel assembling, convenient for assembly.
Wherein, spacing plastic frame 17 is the hollow plastic frame being arranged on transparency carrier 16 marginal surface, limit
The bottom of position plastic frame 17 is connected with transparency carrier 16 marginal surface, and the top of spacing plastic frame 17 forms one
Groove 17A, groove 17A are hollow, and groove 17A is used for assembling liquid crystal panel.
In assembling, based on transparency carrier 16 and transparency regulating reflection layer 14, first use localization tool
By be integrated with the adjustable diffusion layer of transparency 12 and transparency adjustable site layer 13 without dot light guide plate 11, light
Source 15 is fixed on this transparency carrier 16, more spacing plastic frame 17 is fixed to transparency carrier 16, from
And obtain above-mentioned backlight.
Wherein, transparency carrier 16 can be glass (strengthening glass or abrasion-resistance glass) substrate, plastic base,
Silicon substrate etc..
Wherein, spacing plastic frame 17 can be arranged on transparency carrier 16 by transparent double face glue 18.
Specifically, the part of spacing plastic frame 17 is set directly on transparency carrier 16 (on the left of Fig. 5 a),
Another part is arranged on light source 15.Light source 15 uses transparent double face glue 18 to be arranged on transparency carrier 16 equally
On.
Wherein, the bottom surface of transparency carrier 16 is provided with black masking frame 19, for liquid crystal panel correspondence position
(can be specifically liquid crystal panel peripheral leads region) carries out shading treatment.Black masking frame 19 can be one
Layer black thin film, is shaped as hollow, and the width of hollow thin film can fixing with liquid crystal panel light emission side
Frame (see and be hereinafter described) width mates.
Wherein, without being also equipped with transparent double face glue 18 between dot light guide plate 11 and transparency carrier 16.
Further, drive circuit 20 is arranged on spacing plastic frame 17, and drive circuit 20 is by transparent
Double faced adhesive tape 18 sticks on spacing plastic frame 17.Drive circuit 20 is by circuit 21 and the adjustable diffusion of transparency
Layer 12, transparency is adjustable site layer 13, transparency regulating reflection layer 14 electrically connect.Circuit 21 is through spacing
Plastic frame 17 connect drive circuit 20 and the adjustable diffusion layer of transparency 12 (or transparency adjustable site layer 13,
Transparency regulating reflection layer 14), specifically on spacing plastic frame 17, opening or through hole can be set for circuit
21 cablings.
Wherein, drive circuit 20 can be that (Flexible Printed Circuit board is called for short flexible circuit board
FPC)。
The embodiment of the present invention additionally provides a kind of display device, and display device includes Fig. 1 or Fig. 5 a (Fig. 5 b)
Shown backlight 10.
In the specific implementation, the display device that the embodiment of the present invention provides can be mobile phone, panel computer, electricity
Depending on any products with display function such as machine, display, notebook computer, DPF, navigators or
Parts.
The program is adjustable by arranging the adjustable diffusion layer of transparency 12, transparency is adjustable site layer 13 and transparency
Reflecting layer 14 so that when backlight 10 works, can be by the automatically controlled adjustable diffusion layer of transparency 12, thoroughly of making
At least some of site and transparency regulating reflection layer 14 in lightness is adjustable site layer 13 are in opaque shape
State, thus realize the effect in diffusion layer, light guide plate mesh point and reflecting layer, and when backlight 10 does not works,
The adjustable diffusion layer of transparency 12, transparency is adjustable site layer 13 and transparency regulating reflection can be made by automatically controlled
Layer 14 is in pellucidity, thus realizes transparent display；It addition, the expansion that transparency material with adjustable is made
Dissipating layer and compare existing diffusion sheet and reflector plate with reflecting layer, thickness is less, thus can reduce backlight 10
Thickness, thus reduce display device thickness.
Lower polaroid that display device also includes being successively set on the exiting surface of backlight 10, liquid crystal panel and
Upper polaroid.
Wherein, liquid crystal panel can be twisted-nematic (Twisted Nematic is called for short TN) type liquid crystal panel.
TN profile plate is normal bright light transmission state under no power state, it is achieved relative energy-saving during Transparence Display.
Fig. 6 is the structural representation of a kind of display device that the embodiment of the present invention provides, and this display device uses
Backlight 10 shown in Fig. 1 assembles.Lower polaroid 31, liquid crystal surface it is sequentially provided with on the upside of backlight 10
Plate 32 and upper polaroid 33, be provided with substrate 30 on the downside of backlight 10.
This display device also includes that package frame 34, package frame 34 can be vulcanie frames 34.
As shown in Figure 6, double faced adhesive tape 40 is used to connect between lower polaroid 31 and backlight 10.Package frame 34
It is connected with using double faced adhesive tape 40 between backlight 10 and liquid crystal panel 32.
Fig. 7 is the structural representation of the another kind of display device that the embodiment of the present invention provides, and this display device is adopted
Assemble with the backlight 10 shown in Fig. 5 a or 5b.This display device in addition to including backlight 10,
Also include the liquid crystal panel 32 being arranged on the spacing plastic frame 17 of backlight 10.For encapsulating backlight 10
Housing 60 with liquid crystal panel 32.Housing 60 is provided with a circle groove, and groove can arrange touch panel 50.
Can also be embedded reinforcement 70 in housing 60, reinforcement 70 is between housing 60 and touch panel 50.
Wherein, reinforcement 70 can be metal framework structure, such as hollow steel bar.
As it is shown in fig. 7, touch panel 50 is arranged on housing 60 by double faced adhesive tape 40, double faced adhesive tape 40 herein
Usually hollow, with whole display device form fit.Housing 60 is by double faced adhesive tape 40 and backlight
10 connect.
Further, this display device also includes not at the polaroid up and down shown in Fig. 7.
Further, touch panel 50 is selectable unit (SU), when there is no touch panel 50, and can be at liquid crystal
Arranging a fixed frame on panel 32, to be fixed liquid crystal panel 32, fixed frame can be hollow,
Groove match with housing 60.
What deserves to be explained is, due to the reason (such as polaroid) of display device structure, transparent in actual application
State is not likely to be preferable pellucidity, is possibly close to translucent.
Fig. 8 is the flow chart that the embodiment of the present invention additionally provides a kind of backlight drive method, is used for driving Fig. 1
Or the backlight 10 shown in Fig. 5 a (Fig. 5 b), seeing Fig. 8, method includes:
Step 301: when backlight works, controls in the adjustable diffusion layer of transparency, transparency is adjustable site layer
At least some of site and transparency regulating reflection layer be in opaque state.
Step 302: when backlight does not works, controls the adjustable diffusion layer of transparency, transparency is adjustable site layer
It is in pellucidity with transparency regulating reflection layer.
The method is by arranging the adjustable diffusion layer of transparency, transparency is adjustable site layer and transparency regulating reflection
Layer so that during backlight work, can make the adjustable diffusion layer of transparency, transparency is adjustable site by automatically controlled
At least some of site in Ceng and transparency regulating reflection layer are in opaque state, thus realize diffusion layer,
Light guide plate mesh point and the effect in reflecting layer, and when backlight does not works, can make the transparency can by automatically controlled
Adjust diffusion layer, transparency is adjustable site layer and transparency regulating reflection layer to be in pellucidity, thus realize thoroughly
Substantially showing device；It addition, the diffusion layer that transparency material with adjustable is made compares existing diffusion sheet with reflecting layer
And reflector plate, thickness is less, thus can reduce the thickness of backlight, thus reduces display device thickness.
Alternatively, when backlight works, control at least some of site in the layer of transparency adjustable site
In opaque state, including:
When the pixel electrode of the pixel on the liquid crystal panel of site correspondence position powers on and is pressed in the range of first,
Network point is in opaque state；
When the pixel electrode of the pixel on the liquid crystal panel of site correspondence position powers on and is pressed in the range of second,
Network point is in pellucidity.
Wherein, above-mentioned first scope and the second scope can be according to the voltage of the pixel electrode of liquid crystal panel with aobvious
Show that on picture, the corresponding relation of the dark and bright degree of pixel determines, when pixel is brighter, its correspondence
Voltage is the first scope, and when pixel is dark, the voltage of its correspondence is the second scope.Wherein, on picture
Correspondence site, the region transparency that pixel is dark is high, and reflective degree is low, reduces backlight illumination at this；Picture
Correspondence site, the region transparency that upper pixel is lighted is low, and reflective degree is high, improves backlight illumination at this；On
State regulation and on the one hand strengthen enhancing contrast, on the other hand different due to the backlight illumination of dark and bright regions,
Can suitably reduce the voltage of pixel electrode, to reduce the bright-dark degree's regulation effect to pixel, thus rise
To energy-saving effect.
The each site of Control of Voltage according to pixel electrode transparent and opaque such that it is able to according to display dress
The display put, sets the intensity that diverse location on site is reflective, strengthens picture display effect.
Specifically, in embodiments of the present invention, step 301 and 302 controls adjustable diffusion layers of transparency, thoroughly
The state of lightness is adjustable site layer and transparency regulating reflection layer specifically may include that the control adjustable expansion of transparency
Dissipate layer, transparency is adjustable site layer and the voltage added by transparency regulating reflection layer, thus control transparency can
Adjust diffusion layer, transparency is adjustable site layer and the transparency of transparency regulating reflection layer.
For example, it is possible to be the adjustable diffusion layer of transparency, transparency is adjustable site layer and transparency regulating reflection layer
Setting transparent voltage and opaque voltage respectively, transparent voltage is used for making the adjustable diffusion layer of transparency, transparency
Adjustable site layer or transparency regulating reflection layer are in pellucidity, and opaque voltage is used for making transparency adjustable
Diffusion layer, transparency are adjustable site layer or transparency regulating reflection layer are in opaque state.Above-mentioned transparent electrical
Pressure and opaque voltage can be a magnitude of voltage or voltage range.When needs regulate the adjustable diffusion of transparency
When layer, transparency is adjustable site layer or transparency regulating reflection layer are transparent, apply transparent to the electrode of its correspondence
Voltage；When needs regulate the adjustable diffusion layer of transparency, transparency is adjustable site layer or transparency regulating reflection layer
Time opaque, apply opaque voltage to the electrode of its correspondence.
Transparent voltage and opaque voltage can according to the adjustable diffusion layer of transparency, transparency is adjustable site layer and
In transparency regulating reflection layer, the attribute of electrochromic material or liquid crystal is set.
Alternatively, the method also includes: when in backlight work or not working, control the adjustable diffusion of transparency
At least one in layer, transparency is adjustable site layer and transparency regulating reflection layer is in translucent.Tool
Body ground, controls the adjustable diffusion layer of transparency, transparency is adjustable site layer or transparency regulating reflection layer translucent
Time, the voltage of applying is between transparent voltage and opaque voltage.
Specifically include following three kinds of situations: the first, when in backlight work or not working, control transparency
Adjustable diffusion layer, transparency are adjustable site layer and transparency regulating reflection layer are in translucent.Second
Kind, in backlight work or when not working, control the adjustable diffusion layer of transparency, transparency is adjustable site layer and
Any one in transparency regulating reflection layer is in translucent.The third, in backlight work or not work
When making, control appointing in the adjustable diffusion layer of transparency, transparency is adjustable site layer and transparency regulating reflection layer
Two are in translucent.Wherein, transparency adjustable site layer is in translucent and refers to that transparency can
At least part of site in the layer of site is adjusted to be in translucent.
Regulation backlight is translucent, it is achieved the state variation of backlight, thus meets the various of product attribute
Change demand.
These are only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention
Within principle, any modification, equivalent substitution and improvement etc. made, should be included in the protection of the present invention
Within the scope of.
Claims (15)
1. a backlight, it is characterised in that described backlight includes: without dot light guide plate；It is arranged on institute
State without the adjustable diffusion layer of the transparency on the first surface of dot light guide plate；It is successively set on and described leads without site
Transparency adjustable site layer on the second surface of tabula rasa and transparency regulating reflection layer；And it is arranged on described
The light source of side without dot light guide plate；Wherein, described first surface and described second surface are described without site
The two contrary surfaces of light guide plate, described transparency is adjustable diffusion layer, described transparency is adjustable site layer and institute
The state stating transparency regulating reflection layer all includes: pellucidity and opaque state.
Backlight the most according to claim 1, it is characterised in that described transparency is adjustable site layer bag
Include the first transparent upper electrode, multiple first transparent bottom electrodes of matrix arrangement, be arranged on described first transparent on
Between electrode and the plurality of first transparent bottom electrode and with the plurality of first transparent bottom electrode one_to_one corresponding cloth
The multiple transparencys put can adjustable block and the multiple thin film with multiple first transparent bottom electrode one_to_one corresponding settings
The drain electrode of transistor TFT, described TFT and corresponding described first transparent bottom electrode electrical connection.
Backlight the most according to claim 2, it is characterised in that described transparency can adjustable block be liquid crystal
Block or electrochromism block.
Backlight the most according to claim 3, it is characterised in that each described electrochromism block includes
The ion conductive layer being arranged on described first transparent bottom electrode is electroluminescent be arranged on described ion conductive layer
Photochromic layer.
5. according to the backlight described in any one of Claims 1-4, it is characterised in that described transparency can
Diffusion layer is adjusted to include setting gradually the second transparent bottom electrode on the first surface, transparency is adjustable diffusion
Sublayer and the second transparent upper electrode.
6. according to the backlight described in any one of Claims 1-4, it is characterised in that described transparency can
Reflecting layer is adjusted to include the 3rd transparent upper electrode, the transparency being successively set on the layer of described transparency adjustable site
Regulating reflection sublayer and the 3rd transparent bottom electrode.
7. according to the backlight described in any one of Claims 1-4, it is characterised in that described backlight is also
Including drive circuit, described drive circuit, for when described backlight works, controls described transparency adjustable
At least some of site in diffusion layer, described transparency is adjustable site layer and described transparency regulating reflection layer
It is in opaque state；When described backlight does not works, control the adjustable diffusion layer of described transparency, described
Transparency is adjustable site layer and described transparency regulating reflection layer are in pellucidity.
Backlight the most according to claim 7, it is characterised in that described transparency is adjustable diffusion layer,
The state of described transparency is adjustable site layer and described transparency regulating reflection layer also includes: translucent,
When described drive circuit is additionally operable in the work of described backlight or does not works, control the adjustable diffusion of described transparency
At least one in layer, described transparency is adjustable site layer and described transparency regulating reflection layer is in translucent
State.
9. according to the backlight described in any one of Claims 1-4, it is characterised in that described backlight is also
Including transparency carrier and the spacing plastic frame being fixed on described transparency carrier, described without dot light guide plate, institute
State the adjustable diffusion layer of transparency, described transparency is adjustable site layer, described transparency regulating reflection layer and described
Light source is arranged between described spacing plastic frame and described transparency carrier.
10. a display device, it is characterised in that described display device includes that claim 1 to 9 is arbitrary
Backlight described in Xiang.
11. display devices according to claim 10, it is characterised in that described display device also includes
Lower polaroid, liquid crystal panel and the upper polaroid being successively set on the exiting surface of described backlight.
12. display devices according to claim 11, it is characterised in that described liquid crystal panel is distortion
Nematic TN type liquid crystal panel.
13. 1 kinds of backlight drive methods, for driving the backlight described in any one of claim 1 to 9,
It is characterized in that, described method includes:
When described backlight works, control the adjustable diffusion layer of described transparency, described transparency is adjustable site
At least some of site and described transparency regulating reflection layer in Ceng are in opaque state；
When described backlight does not works, control the adjustable diffusion layer of described transparency, described transparency is adjustable net
Point layer and described transparency regulating reflection layer are in pellucidity.
14. methods according to claim 13, it is characterised in that when described backlight works, control
At least some of site made in the layer of described transparency adjustable site is in opaque state, including:
When the pixel electrode of the pixel on the liquid crystal panel of site correspondence position powers on and is pressed in the range of first,
Control described site and be in opaque state；
When the pixel electrode of the pixel on the liquid crystal panel of site correspondence position powers on and is pressed in the range of second,
Control described site and be in pellucidity.
15. according to the method described in claim 13 or 14, it is characterised in that described method also includes:
When in the work of described backlight or not working, control the adjustable diffusion layer of described transparency, described transparency is adjustable
At least one in site layer and described transparency regulating reflection layer is in translucent.
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| CN201610615674.1A CN106019716B (en) | 2016-07-28 | 2016-07-28 | Backlight and its driving method, display device |
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| CN201610615674.1A CN106019716B (en) | 2016-07-28 | 2016-07-28 | Backlight and its driving method, display device |
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