CN201293909Y - Storage type liquid crystal projector equipment - Google Patents
Storage type liquid crystal projector equipment Download PDFInfo
- Publication number
- CN201293909Y CN201293909Y CNU200820201141XU CN200820201141U CN201293909Y CN 201293909 Y CN201293909 Y CN 201293909Y CN U200820201141X U CNU200820201141X U CN U200820201141XU CN 200820201141 U CN200820201141 U CN 200820201141U CN 201293909 Y CN201293909 Y CN 201293909Y
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- source system
- light source
- storage
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a storage type liquid crystal projection device, which comprises a TN liquid crystal box for storing liquid crystal materials internally, an information frame electrical signal driving device, a first light source system, a polarizer, an analyzer, a magnifier and a second light source system. The liquid crystal materials are formed by doping copper porphyrin into the main material of liquid crystal 5 CB, and the percentage of doping concentration by weight is 0.5-1.0%. The information frame electrical signal driving device is used to apply relative electric pulse to row electrodes and line electrodes of the liquid crystal. The first light source system is used to induce the stored liquid crystal materials to store the electrical signals. The second light source system is applied to liquid crystal image reconstruction, light emitted by the second light source system enters a front panel of the TN liquid crystal box via the polarizer and then is emitted out of a rear panel thereof to be projected on a screen via the analyzer and the magnifier, and finally images are displayed on the screen. The storage type liquid crystal projection device has high storage density and fast response, can quickly record and delete, and is particularly adaptable to occasions of projectors, electronic blackboards, billboards and the like.
Description
Technical field
The present invention relates to information technique for displaying field, specifically is a kind of storage-type liquid crystal projecting.
Technical background
Photoelectron technology is 21 century one of the most promising new branch of science, and its growth momentum is very swift and violent.Display technique has obtained very extensive studies and application as the part of photoelectron technology.Liquid crystal display (LCD) is a most rising present display technique, be widely used in above family and projection TV, computer, instrument, the billboard etc., because it is in light weight, size thin, low in energy consumption, radiationless, therefore obtain people's favor, relevant technology and patent also emerge in an endless stream.The premium properties of liquid crystal display derives from the property of liquid crystal material: liquid crystal is the middle phase that is between crystal and the liquid, the anisotropy and the periodic structure that had both had crystal, the flowability that has liquid again, the liquid crystal molecule deformation that can rotate under effect of electric field, produce strong optical non-linear effect, this is the basis of liquid crystal display.
Though the development of LCD is very perfect at present, quality is also very good, but the pattern of its demonstration still dynamically shows: ceaselessly provide information (electric signal) to give liquid crystal display so that show by sweep circuit, even the identical circuit that also needs of information provides same signal in procedure for displaying, otherwise just can stop to show.Therefore this display mode need complicated driving circuit, high power consumption and since ceaselessly scanning make show of low quality.For overcoming these difficulties, a kind of novel static display mode is just used and is given birth to, the static demonstration is meant that mainly storage-type shows, the information that needs to show is provided by circuit, but information is stored and show by liquid crystal, so just do not need circuit to repeat to provide identical information, be particularly suitable for above projection device, electronic blackboard, the billboard etc.
Main storage-type liquid crystal display at present mainly is based on the phase transformation of pure liquid crystal under thermo-optic effect, when flashlight (focusing on about 10 microns laser beam) when shining on the liquid crystal, the liquid crystal temperature of illuminated part rises, be phase-changed into isotropic liquid from the liquid crystal phase process, in case laser beam is shifted to the elsewhere, liquid crystal temperature sharply descends, the phase transformation of appearance from the isotropic phase to the liquid crystal phase, in phase transition process, can form burnt wimble structure with light scattering, produce opaque state, and remain to image wipe always, form the storage memory.If but when temperature descends, give extra electric field, then can get back to pellucidity, the method that the image that writes of heat can electricity consumption is wiped like this; On the other hand, recording light does not have the liquid crystal of illuminated portion to remain transparent configuration.The mode of this thermoelectric effect is controlled complexity, is used speed inconvenient, response very slow, and the density of record is lower.
Summary of the invention
The objective of the invention is to the deficiency that storage shows at available liquid crystal, the storage-type that a kind of response speed is fast, recording density is high liquid crystal projecting is provided.
Technical scheme of the present invention is as follows:
A kind of storage-type liquid crystal projecting is characterized in that
The TN liquid crystal cell that comprises built-in storage liquid crystal material, described storage liquid crystal material are to mix copper porphyrin in material of main part liquid crystal 5CB, and the doping content percentage by weight is 0.5～1.0%;
Comprise the information frame electric signal drive unit that is used on the column electrode of liquid crystal and row electrode, applying corresponding electric pulse;
Comprise being used to induce and store first light-source system that liquid crystal material is stored electric signal, the emergent light of first light-source system can shine the front panel of TN liquid crystal cell equably;
Comprise the polarizer, the polarization direction of the polarizer is parallel to the orientation of the front panel of TN liquid crystal cell;
Comprise analyzer, the polarization direction of analyzer is parallel to the orientation of the rear panel of TN liquid crystal cell;
Comprise magnifier;
Comprise being used for the secondary light source system that liquid crystal image reproduces, the light of secondary light source system outgoing incides the front panel of Tn liquid crystal cell by the polarizer, after its rear panel outgoing through projecting to display image on the screen behind analyzer, the magnifier
Liquid crystal 5CB is general nematic crystal, and its molecular structure is:
The molecular structure of copper porphyrin CuTPP (cuprum porphyrin) is:
Owing to can form the coupling of coordination bond between impurity copper porphyrin and the liquid crystal 5CB, therefore mixed uniformly storage liquid crystal material is uniform solution.Because the impurity copper porphyrin of being mixed is responsive unusually to irradiates light, the storage liquid crystal material can be worked under the low light level and low voltage pulse, and can store apace and delete electric signal.
First light-source system preferably adopts monochromatic source, and the monochromatic source optimal wavelength is the laser of 532nm.
The secondary light source system preferably adopts the three primary light source of high brightness.Further, the secondary light source system comprises collimation mechanism, and the three primary light source of high brightness impinges perpendicularly on the polarizer behind the collimation mechanism collimation.
The duty and the mechanism of storage-type liquid crystal projecting are as follows:
1, the information of the electric signal record stage:
At first recording light (emergent light of first light-source system) is shone on the storage liquid crystal material, simultaneously apply corresponding electric pulse on the column electrode of liquid crystal and row electrode, can show corresponding information frame this moment on liquid crystal, as shown in Figure 2.Under the effect of impurity, liquid crystal, electric signal and recording light, the information that adds electric signal will be stored in the doped liquid crystal the inside, and this is the recording process of electric signal.The microscopic mechanism in this stage as shown in Figure 6, represented among the figure is some pixel (display units, the part that also refers to column electrode and row electrode crossing), excitation light irradiation is to liquid crystal layer, owing to be mixed with impurity (stain is promptly represented impurity among Fig. 6) in the liquid crystal layer, make impurity photo-generated carrier occur, if this display pixel is applied with electric pulse, then photo-generated carrier then drifts to the surface under the effect of extra electric field, the impurity that loses the positively charged of charge carrier then floats to another surface, will form surface charge on the surface of liquid crystal pixel like this; And if this pixel does not apply electric impulse signal, then photo-generated carrier can not spread, and can only be in this locality compoundly falls, and does not just have surface charge yet.Therefore the surface charge of pixel has been represented the information of corresponding electric pulse, and the quantity of surface charge is corresponding to the intensity that adds electric pulse.Form electric charge owing to the charge carrier near the surface can float to the surface rapidly, so the Time Created in this stage is very short, can carries out record short electrical impulse information.Experimental result shows writing time of electric signal of view picture frame at 30 milliseconds to 50 milliseconds, and its occurrence depends on the voltage amplitude of record light intensity and electric signal.
2, the information stores stage of electric signal:
As shown in Figure 3, add electric pulse and be undone, at this moment, each liquid crystal pixel is in different states, though do not have impressed voltage this moment, its surface still exists surface charge, forms internal electric field, make and liquid crystal molecule generation deformation variations in refractive index occurs, as shown in Figure 7.Its change of refractive whether, to change size corresponding with its surperficial amount of charge, and just to write down the electrical impulse information in stage corresponding with the information that was in originally.Although therefore do not add electric signal in this stage, the information of original electric signal is still preserved, so this stage can be called the memory phase of information.Certainly because the electric charge on surface can be progressively compound, cause surface charge to reduce, electric field progressively disappears, and final information can disappear.According to experimental result, its information stores for up to 5 minutes.
3, the information regeneration of electric signal and demonstration stage:
As shown in Figure 4, use playback light, need not apply electric pulse (this is the characteristics of native system, and the doped liquid crystal of other types must apply electric field always in work), then enter information regeneration and demonstration stage.Since the deformation difference of the liquid crystal of each display pixel, and deformation is corresponding with the electric impulse signal in information record stage, each pixel of whole like this doped liquid crystal can be modulated playback light, thus reproduced image.In addition, experimental result shows that the quality of electric signal storage is very good, after information stores a period of time in (being about 5 minutes), the picture quality of reproduction is very high always very stable, picture quality decays rapidly then; Though and existing material is very long some storage time, the exponential damping of storage signal can appear in the process of reappearing, that is to say that again picture quality, can't steady display along with the elongated rapid variation of time.
4, the information deletion stage of electric signal:
As shown in Figure 5, with the row-column electrode short circuit of LCD, then the electric charge on surface can be caused the liquid crystal internal electric field to disappear by " neutralization ", and liquid crystal molecule is return original state.Therefore this stage is the information deletion stage, and experimental result shows that the time of deletion is about 50 milliseconds.
The present invention utilizes the electrooptical effect of storage liquid crystal material to realize that static storage-type shows, storage density improves greatly than prior art, can work under the low light level and low voltage pulse, and response speed is fast, can store apace and delete, and control simple, easy to use.
Description of drawings
Fig. 1 is the structural representation of storage-type liquid crystal projecting.
Fig. 2 is that liquid crystal display is in the information synoptic diagram in record stage.
Fig. 3 is the synoptic diagram that liquid crystal display is in the information stores stage.
Fig. 4 is the synoptic diagram that liquid crystal display is in information regeneration and demonstration stage.
Fig. 5 is the synoptic diagram that liquid crystal display is in the information deletion stage.
Fig. 6 is one of internal mechanism synoptic diagram of storage demonstration.
Fig. 7 is two of the internal mechanism synoptic diagram that shows of storage.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
The structural representation of storage-type liquid crystal projecting as shown in Figure 1, it is the laser of 532nm that first light-source system 1 adopts wavelength, intensity is the 100mW magnitude, and through being radiated at the surface of whole TN liquid crystal cell 5 behind the expansion bundle equably, the emergent light of first light-source system is also referred to as recording light.Secondary light source system 2 adopts the three primary light source of high brightness, impinges perpendicularly on the polarizer 3 behind the collimation mechanism collimation, and the emergent light of secondary light source system is also referred to as playback light.The orientation of the front and back panels of TN liquid crystal cell 5 is vertical, box is thick is 9um, and surface size is 1cm*1cm, is carved with the electrode and the lead-in wire of dot matrix.The twist angle of the liquid crystal molecule 4 that TN liquid crystal cell 5 is built-in is 90 degree, and the polarization direction of the polarizer 3 is parallel to the orientation of the front panel of TN liquid crystal cell 5; The polarization direction of analyzer 6 is parallel to the orientation of the rear panel of TN liquid crystal cell 5; Project to display image on the screen 9 behind the light process analyzer 6 of the rear panel of process TN liquid crystal cell 5, the magnifier 7.The effect of information frame electric signal drive unit 8 is that the information frame with display image is transformed into electric signal and is loaded on the TN liquid crystal cell 5 when recording light is shone, and realizes the storage of signal.
Pure liquid crystal 5CB of nematic and impurity copper porphyrin are mixed equably, and doping content percentage by weight 0.5%.Owing to can form the coupling of coordination bond between impurity and the liquid crystal, so doped system is uniform solution.Doped liquid crystal is poured into the TN liquid crystal cell, obtain the storage-type LCD.
Utilize recording light to induce the storage of doped liquid crystal, utilize playback light to realize the demonstration of store electricity signal again electric signal.When need store to the electric signal of entire frame, only need on electrod-array, add power on signal, simultaneously recording light is shone on the liquid crystal just passable; Adopt playback light to shine above the liquid crystal then, the information that is stored in the electric signal on the liquid crystal will be modulated this light, and projecting to behind the light process magnifier expansion bundle that transmits then promptly can display image on the giant-screen.
In the present embodiment, storing the required time of a two field picture is 30ms; Information stores for up to 5min; The time of information deletion is 50ms.
Compare with embodiment 1, different is the doping content percentage by weight 0.7% of storage liquid crystal material, and experimental result shows that in the present embodiment, storing the required time of a two field picture is 30ms; Information stores for up to 5.5min; The time of information deletion is 50ms.
Compare with embodiment 1, different is the doping content percentage by weight 1% of storage liquid crystal material, and experimental result shows that in the present embodiment, storing the required time of a two field picture is 30ms; Information stores for up to 5.5min; The time of information deletion is 50ms.
By embodiment 1～3 as seen, doping content does not have too much influence to the time of record, storage, deletion, but concentration has very big influence to the quality of storing, and that is to say under the concentration ratio condition with higher, the signal intensity height of reproduction, and the quality of image is good.Yet, when the doping content percentage by weight of storage liquid crystal material surpasses 1%, influence picture quality thereby occur precipitation easily.
Claims (5)
1, a kind of storage-type liquid crystal projecting is characterized in that
The TN liquid crystal cell that comprises built-in storage liquid crystal material;
Comprise the information frame electric signal drive unit that is used on the column electrode of liquid crystal and row electrode, applying corresponding electric pulse;
Comprise being used to induce and store first light-source system that liquid crystal material is stored electric signal, the emergent light of first light-source system can shine the front panel of TN liquid crystal cell equably;
Comprise the polarizer, the polarization direction of the polarizer is parallel to the orientation of the front panel of TN liquid crystal cell;
Comprise analyzer, the polarization direction of analyzer is parallel to the orientation of the rear panel of TN liquid crystal cell;
Comprise magnifier;
Comprise being used for the secondary light source system that liquid crystal image reproduces, the light of secondary light source system outgoing incides the front panel of TN liquid crystal cell by the polarizer, after its rear panel outgoing through projecting to display image on the screen behind analyzer, the magnifier.
2, storage-type liquid crystal projecting according to claim 1 is characterized in that first light-source system adopts monochromatic source.
3, storage-type liquid crystal projecting according to claim 2 is characterized in that described monochromatic source is that wavelength is the laser of 532nm.
4, storage-type liquid crystal projecting according to claim 3 is characterized in that the secondary light source system adopts the three primary light source of high brightness.
5, storage-type liquid crystal projecting according to claim 4 is characterized in that the secondary light source system comprises collimation mechanism, and the three primary light source of high brightness impinges perpendicularly on the polarizer behind the collimation mechanism collimation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820201141XU CN201293909Y (en) | 2008-09-26 | 2008-09-26 | Storage type liquid crystal projector equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820201141XU CN201293909Y (en) | 2008-09-26 | 2008-09-26 | Storage type liquid crystal projector equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201293909Y true CN201293909Y (en) | 2009-08-19 |
Family
ID=41007392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820201141XU Expired - Fee Related CN201293909Y (en) | 2008-09-26 | 2008-09-26 | Storage type liquid crystal projector equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201293909Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141671A (en) * | 2017-06-27 | 2019-01-04 | 江苏和成显示科技有限公司 | A kind of flexibility excess temperature monitoring device |
-
2008
- 2008-09-26 CN CNU200820201141XU patent/CN201293909Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141671A (en) * | 2017-06-27 | 2019-01-04 | 江苏和成显示科技有限公司 | A kind of flexibility excess temperature monitoring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kahn | ir‐laser‐addressed thermo‐optic smectic liquid‐crystal storage displays | |
| KR0140706B1 (en) | Optically switching ferroelectric liquid crystal light valve | |
| JPS6217726A (en) | Display | |
| JPS61198270A (en) | Projection type liquid crystal display unit and method and application thereof | |
| CN201293909Y (en) | Storage type liquid crystal projector equipment | |
| CN101362950A (en) | Storage LCD material and storage type LCD projector equipment using said material | |
| US5189534A (en) | Liquid crystal color displays which cool from isotropic to twisted nematic to smectic | |
| TW200302370A (en) | Information display, method for preparing it and method for using it | |
| CN113391493A (en) | Wide-viewing-angle bistable liquid crystal erasable display device and display method thereof | |
| JPS58116517A (en) | Liquid crystal device | |
| TWI423215B (en) | Driving method for bistable display | |
| JP2003140108A (en) | Optical device | |
| JP3473027B2 (en) | Optical device | |
| JPS6289929A (en) | Method and device for optical recording | |
| JPS6256931A (en) | Projection type liquid crystal display device | |
| JP2537637B2 (en) | Liquid crystal light valve driving method | |
| JPH0468310A (en) | Display device | |
| Cheng et al. | Optical addressing in dye-doped cholesteric liquid crystals | |
| JP2001083480A (en) | Method for driving cholesteric liquid crystal display element and cholesteric liquid crystal display device | |
| JPS639268A (en) | Image input device | |
| JPH0548883B2 (en) | ||
| Yamagishi et al. | A multicolor projection display using nematic-cholesteric liquid crystal | |
| JP2877884B2 (en) | Photothermal writing type spatial light modulator | |
| TW561293B (en) | Bistable LCD driving method | |
| Fagerberg et al. | Electrically Addressed Smectic A Liquid Crystal Displays and their Liquid Crystal Microstructure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20120926 |