CN202394019U - Inactive lighting-type display panel - Google Patents

Abstract

The utility model discloses an inactive lighting-type display panel, which comprises a front substrate, a photomodulator array, a rear substrate and a back light source, wherein strip-shaped addressing electrodes are arranged in parallel at equal intervals on the lower surface of the front substrate; strip-shaped addressing electrodes are arranged in parallel at equal intervala on the upper surface of the rear substrate; the photomodulator array is packaged between the front substrate and the rear substrate; and the photomodulator array is composed of photomodulators arranged according to an array. The inactive lighting-type display panel adopts the photomodulator array of the optical quantum tunnel effect and the inverse piezoelectric effect. Electrodes on the front substrate and the rear substrate are utilized to control the photomodulator arrays to modulate an outer light source provided by the back light source in working so as to achieve a purpose of displaying information. The inactive lighting-type display panel has the advantages of simple manufacture technology and high working efficiency.

Description

A kind of non-active illuminating type display board

Technical field

The utility model relates to non-active illuminating type display panel, relates in particular to a kind of light modulator arrays of having used quantum optics tunnel effect and inverse piezoelectric effect.Specifically utilize the external light source of a kind of new type light modulator array to modulate and make a kind of non-active illuminating type display board of its purpose that reaches demonstration.

Background technology

Electronic console can be divided into active illuminating type and non-active illuminating type at present.The former utilizes information to modulate the luminosity and the color of each pixel, directly shows; The latter itself is not luminous, but utilizes the outer light source of information modulation and make it reach the purpose of demonstration.At occurring in nature, in the human visual information that is obtained, be outer reflected by objects light more than 90%, and be not the luminous of object itself, so passive demonstration is more suitable in human eye vision, be difficult for causing that eye is tired.

LCD panel is an a kind of non-active illuminating type display panel commonly used at present, its principle of work of brief description.Liquid crystal be a kind of between solid-state and liquid between material, be organic compound with systematicness molecules align, if can present the liquid condition of transparence to its heating, the muddy solid state of crystalline particle then its cooling can appear.Just because of its this specific character, so be referred to as liquid crystal.LCD TV is in the liquid crystal between two glass, adds voltage, whether sees through through the light that molecules align changes and backlight is controlled in tortuous variation: let light see through in the place of needs, unwanted local blocking-up light, thereby display frame.With the twisted nematic liquid crystals is example, and like Fig. 1, shown in Figure 2, there is polaroid the liquid crystal cell both sides, and wherein the polaroid of top is a linear polariser, and the polaroid of below is linear analyzer.Their polarizing axis is parallel to each other, and all the liquid crystal molecule whereabouts with liquid crystal cell top-side substrate inside surface place is consistent.When not adding external electric field, when incident light arrives the bottom of box, polarization surface will be vertical with the polarizing axis of analyzer, and light is blocked by analyzer, and the liquid crystal cell of seeing over is opaque from the back side, and is as shown in Figure 1.Behind the extra electric field, do not deflect during incident light process liquid crystal cell, can pass from analyzer, liquid crystal cell is transparent, as shown in Figure 2 seemingly.When liquid crystal molecule was between these two states, light had certain transmitance.In order to improve display effect, LCD panel carries out active driving through the TFT array at present.The principle of work of LCD panel has determined this device to have certain defective: 1, and structure is very complicated, and TFT array manufacturing process requirement is high, and yield rate is low; 2, because the light that backlight sends all will pass through a polarizer, convert natural light to polarized light, so the half the luminous energy that causes damage makes that the luminescence efficiency of panel is not high, cause energy consumption higher, be difficult to satisfy the requirement of energy consumption standard gradually; 3, electro-optic response speed is slow, and therefore the performance aspect dynamic image is undesirable, phenomenons such as hangover can occur; 4, light transmission with close not thoroughly, still have light to be stopped when promptly opening state, still have light transmission during off status, make the panel poor contrast; 5, when watching display board by all directions, Liquid Crystal Molecules Alignment is different, causes transmitted light also different, so visible angle is little.

When electromagnetic wave is n from refractive index ₁It is n that medium is injected refractive index ₂Medium, incident angle α ₁With refraction angle α ₂Satisfy refraction law: n ₁* sin α ₁=n ₂* sin α ₂If n ₁Greater than n ₂, α then ₂Greater than α ₁, promptly when electromagnetic wave during from optically denser medium directive optically thinner medium, the refraction angle will be greater than incident angle.When incident angle is a certain numerical value, the refraction angle will equal 90 °, and this incident angle is claimed critical angle.Critical angle c=arcsin (n ₂/ n ₁).At this moment in optically thinner medium refraction wave will not appear.If incident angle greater than critical angle, does not then have refraction, all electromagnetic wave all turns back to optically denser medium, and this phenomenon is called total reflection.At this moment do not have electromagnetic wave to inject in the optically thinner medium, but the disturbance that has produced certain ripple in the optically thinner medium, this ripple is called as evanescent wave, and it does not carry any energy, and the disturbance of this ripple is along with from the increase of interface distance and weaken to disappearance rapidly.Can be got by mathematical computations, the electric field intensity of this ripple can be expressed as:

${\stackrel{\‾}{E}}^{\left(2\right)}={\stackrel{\‾}{E}}_0^{\left(2\right)}\exp [-\frac{\mathrm{\ω}}{v_2}{(\frac{{\sin }^2{\mathrm{\θ}}_1}{n^2}-1)}^{\frac{1}{2}}z]*\exp \left[\mathrm{i\ω}(\frac{\sin {\mathrm{\θ}}_1}{v_{2}n}x-t)\right]$

Wherein be designated as 1 under the physical quantity in the optically denser medium, be designated as 2 or subscript (2) in the optically thinner medium under the physical quantity.Can see that from formula this is the wave process of a damping vibration attenuation, the represented transmitted wave of this formula is to propagate along z to the special fluctuation that is exponential damping along the x direction, and this ripple is evanescent wave.The ripple cophasal surface of discussing in the past overlaps with equal-amplitude surface, is homogeneous wave; And the cophasal surface of evanescent wave is vertical with equal-amplitude surface, is inhomogeneous wave.This fluctuation can only be close to the interface propagation and can not go deep into optically thinner medium inside, and the amplitude of evanescent wave reduces very soon with getting into depth z.

When electromagnetic wave generation total reflection; If the parallel first optically denser medium next door that is placed on of another piece optically denser medium; Just can find out the relation between this phenomenon and the tunnel effect; If move two media very closely, let evanescent wave pass the surface of second medium, a branch of transmitted light has occurred in second medium.Two medium distances are near more, and the transmitted light that reappears is strong more.Two media near the time transmitted light reason that strengthens be that in the clearance of " be under an embargo through ", the wave amplitude of evanescent wave is decayed greatly not enough.This phenomenon is called and receives to press down inner total reflection, is that the optics of de Broglie wave quantum tunneling effect is corresponding.In other words, can control electromagnetic transmitance through gap length between the change medium.Can know by above-mentioned formula, as get n=1/1.52, θ 1=π/4, then Getting z=v2/ ω=λ 2/2 π is the number of wavelengths magnitude, as z=λ 2/2 π, $\mathrm{Exp}[-\sqrt{{\left(\frac{\mathrm{Sin}{\mathrm{\θ}}_1}{n}\right)}^2-1}]\≈0.6740;$ Z=10 λ 2/2 π, $\mathrm{Exp}[-10\sqrt{{\left(\frac{\mathrm{Sin}{\mathrm{\θ}}_1}{n}\right)}^2-1}]\≈0.0194;$ Z=20 λ 2/2 π, $\mathrm{Exp}[-20\sqrt{{\left(\frac{\mathrm{Sin}{\mathrm{\θ}}_1}{n}\right)}^2-1}]$ $\≈0.0004.$ It is thus clear that along 20 times of the about number of wavelengths magnitude of z direction degree of depth increase, amplitude is reduced to 4/10000ths approximately, energy is reduced to 16/100000000ths approximately.Hence one can see that, and the width of optically thinner medium and electromagnetic wave transmitance have one to one relation, and when the width of optically thinner medium was wavelength 3.2 (20/2 π) times, the electromagnetic wave transmitance was 16/100000000ths.Hence one can see that, through the continuous variation of optically thinner medium width, the electromagnetic wave transmitance changed continuously in 0～100% scope.Optically thinner medium is the quantum optics tunnel structure in the utility model.

Piezoelectric effect: when some dielectric was out of shape in the effect that on certain orientation, receives external force, its inner meeting produced polarization phenomena, on its two apparent surfaces, occurred positive and negative opposite electric charge simultaneously.After external force was removed, it can return to uncharged state again, and this phenomenon is called direct piezo electric effect.When the direction of acting force changed, the polarity of electric charge also changed thereupon.On the contrary, when on the polarization of dielectric direction, applying electric field, these dielectrics also can deform, and after electric field removed, dielectric distortion disappeared thereupon, and this phenomenon is called inverse piezoelectric effect, or is called electrostriction phenomena.

The utility model content

Technical matters: the utility model provide a kind of simple in structure, luminescence efficiency is high, energy consumption is low, contrast is big, the fireballing non-active illuminating type display board of electro-optic response.

Technical scheme: the non-active illuminating type display board of the utility model; Comprise the prebasal plate, light modulator arrays, metacoxal plate and the backlight that are arranged in parallel successively from top to bottom; Prebasal plate and metacoxal plate are transparent glass substrate, show the scan electrode of strip in the equidistant parallel of the lower surface of prebasal plate, show the addressing electrode of strip in the equidistant parallel of the upper surface of metacoxal plate; Scan electrode is vertical with addressing electrode; Light modulator arrays is encapsulated between prebasal plate and the metacoxal plate, and light modulator arrays is made up of the photomodulator by arrayed, and each said photomodulator is positioned at the crossed node of scan electrode and addressing electrode; Photomodulator comprises two prismatic media of placing relatively up and down of right angle trigonometry; The oblique angle face of two media is relatively also gapped; Said gap constitutes the quantum optics tunnel structure; A right angle face of upside medium links to each other with scan electrode, and a right angle face of downside medium links to each other with addressing electrode, and described medium is the material with inverse piezoelectric effect.

In a kind of scheme of the utility model, scan electrode and addressing electrode are transparency conductive electrode;

In a kind of scheme of the utility model, scan electrode is identical with the width of addressing electrode;

In a kind of scheme of the utility model, the change width scope of quantum optics tunnel structure of photomodulator be 0～3.5 times of lambda1-wavelength.

In a kind of scheme of the utility model, be disposed with prismatic panel and scatter plate between metacoxal plate and the backlight.

The principle of work of the utility model display board is following: produce visible light by backlight, a display pixel contains three light emitting diodes and three photomodulators, and they are corresponding one by one on the position, and correspond respectively to red, green, blue three looks.During work, apply scanning voltage on the scan electrode, meanwhile apply required voltage according to the image control signal on the addressing electrode; The medium of photomodulator is in certain electric field; Because inverse piezoelectric effect, the quantum optics tunnel structure in two media is just changed into needed width, makes the visible light of being come by backlight arrive prebasal plate with certain transmitance; So just realized the demonstration of this frame image, so circulation can be pursued the frame displayed image.Photomodulator can make the transmitance of visible light in 0～100% scope, change, and shows so this display board can be realized full color.

Beneficial effect: the utility model is a kind of non-active illuminating type display panel, and its beneficial effect is following:

The first, the utility model has comprised a kind of spatial light modulator, and the principle that it utilized is very ingenious, relates to electromagnetic total reflection and quantum optics tunnel effect.When electromagnetic wave during from optically denser medium directive optically thinner medium, the refraction angle will be greater than incident angle.When incident angle is a certain numerical value, the refraction angle will equal 90 °, and this incident angle is claimed critical angle.When incident angle during greater than critical angle, total reflection will take place, do not have electromagnetic wave to inject in the optically thinner medium this moment; Only there is the evanescent wave that does not carry energy to get into optically thinner medium; Evanescent wave decay is very fast, can in very short distance, decay, if at this moment with another optically denser medium near former optically denser medium; Make evanescent wave before having decayed, get into second optically denser medium; At this moment projection ripple (this effect is called quantum tunneling effect) in second optically denser medium, will occur, this projection wave intensity is relevant with the degree that evanescent wave is decayed in optically thinner medium, and the path length of promptly in optically thinner medium, propagating with evanescent wave is relevant.According to this principle, just can control the transmitance of transmitted wave by the propagation distance of evanescent wave in optically thinner medium.How to control on the problem of optically thinner medium width in solution, the utility model has utilized the inverse piezoelectric effect of medium, just can very like a cork this width be controlled through applying electric field.Formally based on principle cleverly; Make the utility model structure also very simple, whole utility model only comprises prebasal plate, light modulator arrays, metacoxal plate, backlight, and LCD TV commonly used at present then needs liquid crystal cell, polaroid and TFT array etc.; Wherein the manufacture craft of liquid crystal cell is just very complicated; Comprise steps such as being coated with polyimide acid, friction orientation, envelope box, filling crystalline substance, and TFT array manufacturing process requirement is very high, yield rate is low; Comparatively speaking, structure of the utility model and manufacture craft are simply a lot.

The second, electromagnetic wave transmitance adjustable extent was big when the photomodulator that the utility model comprised was worked, and was 0～100%.When distance between two optically denser mediums was 0, the electromagnetic wave transmitance was 100%; When distance between two optically denser mediums more than or equal to 3.2 times when seeing through electromagnetic wavelength, the electromagnetic wave transmitance is 0; When distance between two optically denser mediums between above-mentioned between the two the time, the electromagnetic wave transmitance is an a certain numerical value between 0 to 100%.Hence one can see that, and the utility model is very high to the utilization factor of light, and light all sees through during bright attitude, not loss, and luminescence efficiency is high, and energy consumption is low, and simultaneous contrast's (being defined as the ratio of maximum transmission and minimum transmitance) is greatly.And because LCD panel when work, electromagnetic wave need pass through polaroid, and is well-known, when natural light becomes polarized light through a polaroid, rise energy be reduced at least original half the, so the liquid crystal panel luminescence efficiency is low, the energy consumption height.And LCD panel is when working in light blocking state, because the defective of its principle still has fraction light to see through, promptly its minimum transmitance is also less than 0, so its contrast is very low.Comparatively speaking, the advantage of the utility model clearly, luminescence efficiency is high, energy consumption is low, the simultaneous contrast is big.

The 3rd, based on the inverse piezoelectric effect of medium, the electro-optic response speed of photomodulator is fast, thereby makes the response time of the utility model short, and dynamically display effect is good, and the response time of LCD panel is long, and dynamically display effect is poor.

The 4th, when watching LCD panel by all directions, Liquid Crystal Molecules Alignment is different, causes transmitted light also different, so visible angle is little.Spatial light modulator is watched all equally by all directions in the utility model, and light is dispersed to all directions after arriving prebasal plate, and is so visible angle is unrestricted, bigger than the visible angle of LCD panel.

Description of drawings

Fig. 1 is available liquid crystal box fundamental diagram (a light blocking state).

Fig. 2 is available liquid crystal box fundamental diagram (a light transmission state).

Fig. 3 a, Fig. 3 b and Fig. 3 c are that the quantum optics tunnel width and the light of the utility model display board passes through the situation synoptic diagram, and wherein Fig. 3 a is the less state of transmitance, and Fig. 3 b is the medium state of transmitance, and Fig. 3 c is the big state of transmitance.

Fig. 4 is a transmission-type spatial light modulator structure synoptic diagram.

Fig. 5 is the three-dimensional structure diagram of the utility model.

Fig. 6 is the facade plan view of the utility model.

Fig. 7 is the facade side elevation of the utility model.

Fig. 8 is that backlight is the synoptic diagram of cathode fluorescent tube.

Among the figure: 1, prebasal plate; 2, photomodulator; 3, metacoxal plate; 4, scan electrode; 5, light modulator arrays; 6, addressing electrode; 7, backlight; 8, prismatic panel; 9, scatter plate; 10, incident light; 11, polaroid; 12, liquid crystal molecule; 13, transmitted light; 14, quantum optics tunnel structure; 15, medium; 16, reflected light.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

The non-active illuminating type display board of the utility model; Comprise the prebasal plate 1, light modulator arrays 5, metacoxal plate 3 and the backlight 7 that are arranged in parallel successively from top to bottom; Prebasal plate 1 is transparent glass substrate with metacoxal plate 3, shows the scan electrode 4 of strip in the equidistant parallel of the lower surface of prebasal plate 1, shows the addressing electrode 6 of strip in the equidistant parallel of the upper surface of metacoxal plate 3; Scan electrode 4 is vertical with addressing electrode 6; Light modulator arrays 5 is encapsulated between prebasal plate 1 and the metacoxal plate 3, and light modulator arrays 5 is made up of the photomodulator 2 by arrayed, and each said photomodulator 2 is positioned at the crossed node of scan electrode 4 and addressing electrode 6; Photomodulator 2 comprises two prismatic media of placing relatively up and down of right angle trigonometry; The oblique angle face of two media is relatively also gapped; Said gap constitutes quantum optics tunnel structure 14; A right angle face of upside medium links to each other with scan electrode 4, and a right angle face of downside medium links to each other with addressing electrode 6, and described medium is the material with inverse piezoelectric effect.

Among a kind of embodiment of the utility model, scan electrode 4 is transparency conductive electrode with addressing electrode 6;

Among a kind of embodiment of the utility model, scan electrode 4 is identical with the width of addressing electrode 6;

Among a kind of embodiment of the utility model, the change width scope of quantum optics tunnel structure of photomodulator 2 be 0～3.5 times of lambda1-wavelength.

Among a kind of embodiment of the utility model, be disposed with prismatic panel 8 and scatter plate 9 between metacoxal plate 3 and the backlight 7.

Embodiment 1: light modulator arrays 5 is encapsulated between prebasal plate 1 and the metacoxal plate 3, and prebasal plate 1 is a transparent glass substrate, and the equidistant parallel of its lower surface is shown the scan electrode 4 of strip, and scan electrode 4 is for being prepared in the transparency conductive electrode on the glass substrate; Metacoxal plate 3 also is a transparent glass substrate, and the equidistant parallel of its upper surface is shown the addressing electrode 6 of strip, and addressing electrode 6 is for being prepared in the transparency conductive electrode on the glass substrate; 6 one-tenth spatial vertical of scan electrode 4 and addressing electrode, scan electrode 4 is identical with the width and the thickness of addressing electrode 6; Light modulator arrays 5 is made up of many small photomodulators 2, and the photomodulator number is by the pixel decision of display panel, and a pixel is made up of three photomodulators, and each photomodulator 2 is arranged on the crossed node place of scan electrode 4 and addressing electrode 6; A photomodulator 2 is made up of the prismatic medium of placing relatively up and down of right angle trigonometry, between two media the slit is arranged, and constitutes the quantum optics tunnel structure, and two media link to each other with scan electrode 4, addressing electrode 6 respectively; Backlight 7 is a LED array.

Embodiment 2: on the foregoing description 1 basis, backlight 7 replaces with cathode fluorescent tube (CCFL), and is equipped with scatter plate 9, prismatic panel 8, makes illumination effect good, and cathode fluorescent tube emits white light.Between backlight 7 and light modulator arrays 5, increase color filter, a display pixel contains three color filters and three photomodulators 2, and they are corresponding one by one on the position, and correspond respectively to red, green, blue three looks, like Fig. 8.

Embodiment 3: on embodiment 1 basis, backlight 7 replaces with plasma flat-plate light source, and plasma flat-plate light source emits white light.Between backlight 7 and metacoxal plate 6, increase color filter; Corresponding three color-filter units of display pixel and three photomodulators 2; These three color-filter units are respectively red, green, blue three looks, and the color-filter unit of a pixel correspondence and photomodulator are corresponding one by one on the position.

Embodiment 4: on embodiment 1 basis, backlight 7 replaces with electroluminescence (EL) light source, and electroluminescent light source emits white light.Between backlight 7 and light modulator arrays 5, increase color filter, a display pixel contains three color filters and three photomodulators 2, and they are corresponding one by one on the position, and correspond respectively to red, green, blue three looks.Electroluminescent light source can be flexibility, because light modulator arrays 5 can be flexibility, therefore in this embodiment, prebasal plate 1 adopts the flexible thin-film material with metacoxal plate 3, and the utility model is flexible display board.

Above embodiment has only provided the concrete example application of part, but for the technician who is engaged in flat-panel monitor, also can design the various deformation product according to above enlightenment, and this still is considered to be covered by among the utility model.

Claims (5)

1. non-active illuminating type display board; It is characterized in that; Comprise the prebasal plate (1), light modulator arrays (5), metacoxal plate (3) and the backlight (7) that are arranged in parallel successively from top to bottom; Said prebasal plate (1) and metacoxal plate (3) are transparent glass substrate, show the scan electrode (4) of strip in the equidistant parallel of lower surface of prebasal plate (1), show the addressing electrode (6) of strip in the equidistant parallel of upper surface of metacoxal plate (3); Said scan electrode (4) is vertical with addressing electrode (6); Said light modulator arrays (5) is encapsulated between prebasal plate (1) and the metacoxal plate (3), and light modulator arrays (5) is made up of the photomodulator (2) by arrayed, and each said photomodulator (2) is positioned at the crossed node of scan electrode (4) and addressing electrode (6);

Said photomodulator (2) comprises two prismatic media of placing relatively up and down of right angle trigonometry; The oblique angle face of two media is relatively also gapped; Said gap constitutes quantum optics tunnel structure (14); A right angle face of upside medium links to each other with scan electrode (4), and a right angle face of downside medium links to each other with addressing electrode (6), and described medium is the material with inverse piezoelectric effect.

2. non-active illuminating type display board according to claim 1 is characterized in that said scan electrode (4) and addressing electrode (6) are transparency conductive electrode.

3. non-active illuminating type display board according to claim 1 is characterized in that said scan electrode (4) is identical with the width of addressing electrode (6).

4. non-active illuminating type display board according to claim 1 is characterized in that the change width scope of the quantum optics tunnel structure of described photomodulator (2) is 0 ~ 3.5 times of lambda1-wavelength.

5. non-active illuminating type display board according to claim 1 is characterized in that, is disposed with prismatic panel (8) and scatter plate (9) between said metacoxal plate (3) and the backlight (7).

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