CN101533633B - Display element drive method - Google Patents
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- CN101533633B CN101533633B CN2009101354801A CN200910135480A CN101533633B CN 101533633 B CN101533633 B CN 101533633B CN 2009101354801 A CN2009101354801 A CN 2009101354801A CN 200910135480 A CN200910135480 A CN 200910135480A CN 101533633 B CN101533633 B CN 101533633B
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Abstract
The invention provides a display element drive method which can mechanism assemble form system between a display device (1) without electrical power source and an information display device (2) for transmitting display data or electrical power source to a wireless terminal of the display device (1). The display device (1) includes: a display part (3) which can display continuously after the electrical power source cut-off; a close distance communication part (4) for receiving displaying data from outside; and a display control part (5) aiming at the received data, the device (2) also includes: a storage part (6) for storing the display data; a communication part (7) transmitting the display data to the device (1) side, such as the device (2) also has a mechanism disassembly part for installing the device (1) on the self device.
Description
The application is that application number is 03826830.2, the applying date is on September 4th, 2003, denomination of invention is divided an application for the application of " information display system, display element, display element drive method and display device ".
Technical field
The present invention relates to for example by movable equipment and the information display system that device constituted, the display element that in such massaging device, uses, display element drive method and display device that the arbitrary data that provides by this equipment is provided, more specifically, even relate to the display device that the system, the use that for example are made of wireless terminal and contactless IC card are cut off the electricity supply and also can be kept the display element and the driving method thereof of the cholesteric crystal that shows etc. and utilize Electronic Paper with such storage etc.
Background technology
There is the display message of pair portable phone, PDA, digital camera etc. to amplify the requirement of demonstration.As a method for this reason, take the method for only part of terminal picture being amplified.Utilize this method can't once see entire image certainly, therefore need loaded down with trivial details operations such as rolling.Another method is, wireless near field communication functions such as bluetooth, infrared ray, WLAN are set on portable terminal device, utilizes wirelessly to send image information to the big view display that carries on personal computer, TV etc., thereby shows.Perhaps take such method: do not utilize wireless transmission, but utilize wireline interface linkage functions such as USB, IEEE1394 to come transmitted image, show thereby carry out big picture.But under mobile environment such as the ground of going out, because display needs AC power or certain battery, and device itself is heavier, so such amplification display method is not suitable for movable equipment.
As the display packing under the mobile environment that is used to avoid the problems referred to above, consider on portable terminal device, to connect amplifying display in light weight and that power consumption is low.The Electronic Paper light by operating weight, that power consumption is low has proposed such trial.In such method, owing to be to electrically contact connection, so, can produce following problem: 1) continuing under the situation about connecting, the size of portable terminal device becomes in fact greatly, 2) under the situation about only connecting in use, can produce deterioration owing to the fatigue of electric contact, 3) to disconnect the connection back and show disappearance, perhaps to show that in order preventing disappearance need be battery-mounted to display.Battery-mountedly not only cause the battery altering of display or the inconvenience of battery charge, and increased the thickness or the weight of display.Thereby require to have can address these problems, the essence of terminal own is less, have the display frame of amplification and hands-free removable display system.
In addition, the requirement of printing any display message of portable phone, PDA, digital camera etc. in go out ground or access is arranged.To this, battery-driven removable printing equipment market is on sale, still, has the problem of weight and volume and the problem of replenishing of paper and battery.People expectation shows not having to print under the state that is similarly breaking away from portable terminal device with paper in fact under the situation of printer, to replace such printing equipment.
In order to carry out such demonstration, exist and use contact IC-card or the prior art of RF (radio frequency) label and the following document that relates to the contactless IC card that uses near radio.In patent documentation 1, a kind of IC-card that rewrites the displaying contents of display part is disclosed.
In patent documentation 2, patent documentation 3 and the patent documentation 4, disclose and had the IC-card that shows with power supply, in patent documentation 2, used solar cell, in patent documentation 3, used lithium battery, for example in patent documentation 4, used solar cell as boosting battery.
In patent documentation 5 and patent documentation 6, do not use accessory power supplys such as solar cell, even and be to use the storage display element of cutting off the electricity supply and can keep displaying contents yet.In patent documentation 5, proposed to use for example strong dielectricity liquid crystal display cells or electrochromism (エ レ Network ト ロ Network ロ ミ Star Network) display element, in patent documentation 6, proposed the use cholesteric to row (コ レ ス テ リ Star Network ネ マ テ イ Star Network) inversion of phases liquid crystal.
Real fair 7-30384 communique: " IC-card "
The spy opens clear 62-242592 communique: " IC-card "
The spy opens clear 63-3393 communique: " card processing system with Presentation Function "
The spy opens the 2003-6590 communique: " information recording carrier with accessory power supply "
Te Kaiping 10-93484 communique: " data carrier "
The spy opens the 2000-113137 communique: " non-contact information record display packing and non-contact information recording display medium "
This near radio utilizes wireless usually and passes through the IC card reader/writer of lift-launch on fixed terminal, with power free IC-card exchange message.As long as card is approaching with writer, just can provide displayed record electric power and display message on the principle, the line item of going forward side by side shows.But, in the prior art, do not utilize the noncontact wireless technology links with movable termination, display system easily, in addition, in reality, because for example record electricity, voltage, storage retentivity, not enough these several technology reasons of writing speed still are unrealized to the demonstration of contactless IC card.People wish that the above-mentioned noncontact wireless technology of favourable usefulness transmits arbitrarily display message and amplifies display system easily or Electronic Paper demonstration, that be suitable for removable purposes from portable terminal device.
Make in white or the white liquid of black charged corpuscle in pod membrane (カ プ セ Le) outstanding turbidly as the electrophoresis of effective storage medium, and utilize the Electrostatic Absorption particle, so on the principle, storage retentivity and high-speed driving, low voltage drive are inconsistent.Thereby be difficult in the non-transformer record, use it.Electrochromism is a storage display packing of utilizing chemical reaction, but writes big, the wireless difficulty that writes of electric power.In addition, about storage property liquid crystal, the writing speed of strong dielectricity storage liquid crystal media is fast, but the problem that exists is: because the brightness of using polarizing coating that reflective white is shown is not enough and because the physical shock meeting causes showing disappearance.
As storage property liquid crystal, has the cholesteric nematic phase modification liquid crystal cell that proposes in the aforementioned patent document 6.This material use light scattering, but exist contrast low and in order to keep stable demonstration to need the problem of bias voltage.
Relative therewith, cholesteric crystal (comprising hand levies to row (カ イ ラ Le ネ マ テ イ Star Network) liquid crystal), selection reflectivity with the light that optionally reflects certain wavelength, the corresponding optical wavelength of interlamellar spacing (ピ Star チ) of reflection and liquid crystal, thus show monochromatic color.Therefore, in order to realize multicolor, a kind of stromatolithic structure has been proposed as following patent documentation 7.
Te Kaiping 9-160066 communique: " reflection-type liquid-crystal display device "
Fig. 1 represents to use the existing example of liquid crystal cell of the stromatolithic structure of cholesteric crystal.In the figure, insert 3 layers of liquid crystal 204,205,206 between upper and lower base plate 201, it is bonding by transparency electrode 202 to be situated between respectively, constitutes liquid crystal cell thus, but in this structure, the interface is many, stray light is many and show that contrast is low.Also exist and constitute the problem that the unit is many, become the high price device.
That is, cholesteric crystal shows the color that certain is monochromatic, if 2 kinds of liquid crystal phases are mixed, will mix at an easy rate, can not reflect the color of hope.If the liquid crystal more than 2 kinds mixes, just become Neutral colour or no reflection events state.As the method for separating liquid crystal, has the pod membrane structure of liquid crystal being enclosed pod membrane, but because the interface of pod membrane and the influence of thickness, can cause that the contrast that is caused by stray light reduces and the rising of driving voltage, thereby be not suitable in display device, using, and there is the problem that is difficult to the pod membrane that configuration is wished on the pixel of hope.
Below, the problem that such cholesteric crystal is used for the power circuit etc. under the situation of non-transformer display device, for example non-contact IC card or Electronic Paper is described.Usually, the method of using in power free contactless IC card etc. is, utilize near radio to receive demonstration electric power with data from for example portable terminal device or IC card reader/writer etc., show with this, therefore, it is little to can be used as the power value that power supply uses, and need carry out for example electric current restriction etc. to power circuit etc.
Particularly, cholesteric crystal needs 2 kinds of different drive waveforms of peak value in order to be driven into plane (プ レ one Na) state and focal conic (the Off オ one カ Le コ ニ Star Network) state as 2 kinds of steady state (SS)s as described later respectively.And, need about 40V at the driving voltage of flat state, to compare with other display element, this value is considerably high.Therefore, has the high problem of power circuit cost.In addition,, then need the big capacitor of electrostatic capacitance (μ F level), therefore, exist to be difficult to power circuit is designed at thickness 1mm with interior problem if use general DC-DC converter.
Fig. 2 represents the existing example of the drive waveforms of passive matrix element.As shown in the drawing, be positioned on the pixel of selecting on the level line and must apply driving voltage with connecting, disconnect accordingly to signal wire at plane and focal conic state, in addition, be positioned at and be applied to the constant voltage of state that writes when selecting on the pixel on the non-selection level line, commercially available stn liquid crystal driver LSI for example needs 5 kinds of voltages, thereby has the high problem of power circuit cost.
Then, for example drive the electric power amount that provided under the situation of contactless IC card for example owing to the distance between card reader/writer and IC-card different change very big at the electric power that only utilizes IC card reader/writer to provide.Therefore the problem that exists is: if the display part continuous firing, then compare with the general contactless IC card that does not have display part, communication distance shortens significantly, perhaps, the needed electric power of contactless IC card chip is temporarily not enough in communication, thereby operation will be unstable.For such problem, need carry out and the corresponding demonstration control of the electric power amount of providing.
In addition, when starting, the electric power of cholesteric crystal that is used to drive passive matrix is less, thereby can utilize from carrying the electric power that contactless IC card card reader/writer on PDA etc., that have faint output provides, and operates fully.But existing driver LSI is shown as prerequisite to carry out moving image, and the impedance the during transistor turns of terminal section is low, so flow through great momentary current (during stable operation 5～10 times) under the transition state when starting.Therefore the problem that exists is, even the several times electric power when stable operation is provided also possibly can't start existing driver LSI.
Only preparing the big power supply of supply capacity for startup is totally unfavorable on cost, and, 5～10 times electric power when carrying card reader/writer on PDA etc., that have faint output and can not provide stable operation fully.The exploitation that the supply capability of the consumption electric power when therefore, utilizing as far as possible near stable operation stably starts the control method of existing driver LSI is indispensable.
In addition, as previously mentioned, cholesteric crystal corresponds respectively to the plane driving and focal conic drives, and need 2 kinds of different drive waveforms of peak value, and this peak value need be along with temperature variation.Therefore the problem that exists is, if widen operating temperature range, then the peak value of the peak value of the driving of the plane under the high temperature and the driving of the focal conic under the low temperature is close, and is difficult to guarantee the surplus (マ one ジ Application) of peak value.In order to enlarge the range of application of cholesteric crystal, expectation has the method for guaranteeing the surplus of peak value in the operating temperature range of broad.
Below, the problem of the high-speed driving of cholesteric crystal is described.As previously mentioned, the driving of cholesteric crystal comprises that the plane drives and focal conic drives, usually use ac pulse voltage, but, reason owing to liquid crystal material, if with than cycle of about 20ms, be that the also fast speed of 20ms/ line writes, then have as shown in Figure 3 the insufficient and problem that reduces greatly of contrast as shown in Figure 4 to the transfer of focal conic state.If to write than above-mentioned slow-footed speed, can obtain enough contrasts, still, even the picture of QVGA size (320 * 240 point) for example, writing end also needs about 5 seconds, thus long problem of the time of end to be shown such as existence.
As the high-speed driving method that addresses this problem, develop the driving method of the following stated, but in such method, there is variety of issue utilizing in the faint electromagnetic wireless driving as contactless IC card of object of the present invention etc.Below be prerequisite with using of cholesteric crystal, representational high-speed driving method and problem thereof are described.
In the patent documentation 8 below, the wiring method of a kind of FCR of being named as (focal conic resets (Focal Conic Reset)) method is disclosed, this wiring method at first applies the resetting voltage that is used to transfer to the focal conic state to whole scan electrodes, afterwards, provide selection voltage to each scan electrode successively.But, selected resetting in batch of whole scan electrodes very big owing to having selected whole scan electrodes to consume electric power, so, be not suitable for wireless driving.Particularly, power consumption is very big to the focal conic state transitions time.
In addition, in patent documentation 9, the method for also using comprehensive vertical (ホ メ オ ト ロ ピ Star Network) to reset, with above-mentioned same, the consumption electric power when resetting is very big.Therefore, wireless driving lacks practicality.
Disclosed DDS in patent documentation 10 grades (dynamic driving scheme, Dynamic DriveScheme) is though the method sweep velocity is fast, because complicated drive waveforms, and the complicated and high price of driving circuit.And, because that the show state of pixel reaches stable total time (reseting period～during keeping) is long,, be not suitable for wireless driving so it is big to consume electric power.
In addition, well-known MLA (multi-thread access) method in STN drives so it is big to consume electric power, is not suitable for wireless driving owing to drive many lines in batch.In addition, the also complicated and high price of driving circuit.
The consumption electric power of the image that spatial frequencys such as tartan are high is significantly bigger, so above-mentioned driving method more is unsuitable for wireless driving.
Plane resets can stay image retention.
In patent documentation 11, a kind of test example is disclosed as many lines that comprise identical writing line data, the method that also simultaneously these many lines is write, still, the determining method of the max line number that writes simultaneously is unclear.
Te Kaiping 11-326871 communique: " driving method of liquid crystal display cells "
Patent documentation 9
The spy opens the 2002-6287 communique: " driving method and the drive unit of storage property cholesteric crystal display device "
The spy opens the 2002-55327 communique: " driving method of liquid crystal indicator and liquid crystal display cells "
Te Kaiping 10-20809 communique: " method for displaying image and device "
As the present invention, for example under the situation that contactless IC card is driven, especially need be up to the high-speed driving of μ s level, but corresponding with wireless less supply electric power, need unique high-quality high-speed driving method.
The problem of the display device of using the Electronic Paper used above-mentioned cholesteric crystal etc. is described at last.Even utilize that having simultaneously cuts off the electricity supply and show the feature that does not also disappear and can at random rewrite the exploitation well afoot of display device of Electronic Paper of the feature of displaying contents, but there is the problem that does not possess automatic Presentation Function in existing this device at once.
Promptly, the problem that exists as automatic display unit is, since do not have with should when, wherefrom, how to obtain to want the relevant information of data presented or do not have the information of the Show Styles of the video data that is obtained, so, such display device can not be provided: according to the information of preparation method, automatically obtain video data, and according to the information of Show Styles, automatically show, automatically become holding state then.
Summary of the invention
First purpose of the present invention is, by can and sending mechanically loading and unloading between the wireless terminal of video data arbitrarily or electric power to this information display device at the information display device that does not for example have power supply, provides a kind of information display system as a whole.
Second purpose is, a kind of cholesteric crystal that uses multiple color is provided, realizes the display element of high-contrast and the display device of using such display element with low cost.
The 3rd purpose is, provides under the little situation of a kind of electric power amount of for example supplying with in contactless IC card, also can use the power circuit of the stable operation that various control modes block.
The 4th purpose is, a kind of element drive method and method for displaying image that for example reduces electric power consumption in the display device of using cholesteric crystal as much as possible is provided.
The 5th purpose is, a kind of automatic display unit is provided, this automatic display unit is preserved information relevant with the preparation method of data to be shown and the information relevant with the Show Styles of video data, can automatically obtain data from the outside, and after showing these data, automatically turn back to holding state, and has application fields.
Information display system of the present invention is made of display device and video data holding device, and display device has: display unit, also can proceed data presentation even cut off the electricity supply; The short-range communication unit carries out in-plant communication in order to receive data to be shown from the outside; And indicative control unit, control the demonstration of display unit accordingly with the data that receive by the short-range communication unit.
The video data holding device has: storage unit keeps video data; And communication unit, at least in in-plant scope, send video data to display device side accordingly with the memory contents of storage unit.
Also can have and be used to mechanical handling unit that display device and video data holding device are are mechanically loaded and unloaded, can the data that the display part on video data holding device, for example portable terminal device is shown send to display device side, amplify demonstration.
At display element of the present invention, promptly the display element that injects liquid crystal between 2 substrates has dividing plate, and this dividing plate has the structure that is used to make the liquid crystal that is injected into 2 multiple colors between the substrate not to be in contact with one another.
In addition, display device of the present invention has: first display element, have through pattern and reflective-mode, and can switching display content; Second display element of reflection-type shows still image or fixing literal, can discern displaying contents by first display element.
Display device of the present invention has temperature compensation unit, and this temperature compensation unit changes peak value with the waveform of the plane of for example cholesteric crystal and corresponding each driving voltage of focal conic state according to temperature.In addition, display device of the present invention has the coil that is provided with in order to receive high frequency magnetic field from the outside, this coil has centre tap, and, an end ground connection of coil, and between centre tap and ground, connect the resonance capacitor, and, this display device has: the logic power supply unit, to carrying out rectification with the HF voltage that two ends produced of capacitor in this resonance, and provide at show with beyond the voltage of circuit; Show and use power supply unit, the other end and the HF voltage between the centre tap of coil are carried out rectification, and demonstration voltage is provided.
As element drive method of the present invention, in the array display device that uses cholesteric crystal, use following driving method: the part of scan electrode is set at the reset line of selection mode and the time-out line of writing line and nonselection mode respectively; On one side the conversion reset line, suspend line, writing line, on one side provide to the signal electrode side and to write data-signal.
In addition, as display element drive method of the present invention, in aforesaid array display device, use following driving method: detect many identical lines of data pattern to be shown in the many lines in display frame; Select these detected many lines simultaneously, the data of identical patterns are offered signal electrode, carry out writing in batch of identical patterns data.
Display device of the present invention has: display unit, also can proceed data presentation even cut off the electricity supply; Storage unit is stored information relevant with the preparation method of data to be shown and the information relevant with the Show Styles of the video data that is obtained; And control module, according to the memory contents of this storage unit, control obtains video data and shows this video data at described display unit from the outside.
As mentioned above, according to the present invention, even constitute display device by using the cholesteric crystal display element that also can proceed data presentation of for example cutting off the electricity supply to wait, and the video data holding device configuration information display system of video data and electric power be provided to display device side simultaneously by this display device and for example portable terminal device etc.
Description of drawings
Fig. 1 is the figure of structure of the existing example of expression cholesteric crystal element.
Fig. 2 is the figure of expression at the existing example of the drive waveforms of passive matrix element.
Fig. 3 be expression cholesteric crystal type of drive existing example problem figure (one of).
Fig. 4 is the figure (two) of problem of the existing example of expression cholesteric crystal type of drive.
Fig. 5 is the theory structure block scheme of information display system of the present invention.
Fig. 6 is the theory structure block scheme of display device of the present invention.
Fig. 7 is the block diagram of first example of the display system of expression embodiment 1.
Fig. 8 is the block diagram of second example of the display system of expression embodiment 1.
Fig. 9 is the key diagram of the same frame display mode in the system of Fig. 7.
Figure 10 is the key diagram of the different pictures display mode in the system of Fig. 7.
Figure 11 is the key diagram of the picture and selecting sending mode in the system of Fig. 7.
Figure 12 is the key diagram of the data presentation on the radio display.
Figure 13 be the portable terminal device side mechanical installing mechanism (one of) key diagram.
Figure 14 is the key diagram of the mechanical installing mechanism (two) of portable terminal device side.
Figure 15 be the radio display side mechanical installation portion (one of) key diagram.
Figure 16 is the key diagram of the mechanical installation portion (two) of radio display side.
Figure 17 is the key diagram as the magnet magic strap of the installing mechanism of end side.
Figure 18 is the key diagram as the magnet magic strap of the installing mechanism of radio display side.
Figure 19 is the figure of the example of expression the worn display system of using radio display.
Figure 20 is the key diagram of the flat state of cholesteric crystal.
Figure 21 is the key diagram of the focal conic state of cholesteric crystal.
Figure 22 is the figure of example of the reflecting spectrum of expression cholesteric crystal.
Figure 23 is the key diagram at the plane drive waveforms of cholesteric crystal.
Figure 24 is the key diagram at the focal conic drive waveforms of cholesteric crystal.
Figure 25 is the figure of the response characteristic of expression cholesteric crystal.
Figure 26 is to use the configuration example of the reflection type liquid crystal display element of cholesteric crystal.
Figure 27 is to use the key diagram of the example that the segmentation of cholesteric crystal shows.
Figure 28 is the figure that the liquid crystal of representing matrix substrate separates structure.
Figure 29 is the figure of the separation structure of two kinds of liquid crystal of expression.
Figure 30 is the figure of the dot structure example of expression Figure 29.
Figure 31 is the key diagram of formation of the son point of Figure 29.
Figure 32 is the figure of the separation structure of 3 kinds of liquid crystal of expression.
Figure 33 is the figure of formation of the point of expression Figure 32.
Figure 34 is the figure of formation of the son point of expression Figure 32.
Figure 35 is the overlapping figure that shows example of expression printed article and changeable type display element.
Figure 36 is the figure of the show state of explanation Figure 35.
Figure 37 is that expression is the overlapping figure that shows example of purpose with merchandise sales.
Figure 38 is expression and the single-phase corresponding overlapping figure that shows example of restaurant fare.
Figure 39 is expression and the corresponding overlapping figure that shows example of schedule.
Figure 40 is expression and the corresponding overlapping figure that shows example of map.
Figure 41 is expression and the corresponding overlapping figure that shows example of workbook.
Figure 42 is that expression is simulated the corresponding overlapping figure that shows example with bank loan.
Figure 43 is the figure of example of power circuit of the contactless IC card etc. of expression embodiment 3.
Figure 44 represents to be provided with independently the figure that the example of the power circuit of using power supply was used and shown to logic.
Figure 45 is the figure of expression at the configuration example of the power circuit of the liquid crystal driver LSI that needs the multiple voltage value.
Figure 46 is the configuration example that limits the circuit of supplying with to the electric power of display part according to the electric power quantity delivered.
Figure 47 is the configuration example of clock output circuit that prolongs the drive cycle of display part according to the electric power quantity delivered.
Figure 48 comes output image to show the configuration example of the circuit of inhibit signal according to the electric power quantity delivered.
Figure 49 is at the configuration example that shows with the current limit circuit of power supply.
Figure 50 is the example of peak value of the drive waveforms of cholesteric crystal.
Figure 51 is an example of having widened the peak value of the drive waveforms under the situation of pulse width.
Figure 52 is the example that changes the peak value of drive waveforms according to temperature point-blank.
Figure 53 is the configuration example of temperature-compensation circuit that is used to realize the characteristic of Figure 52.
Figure 54 is the block scheme that the liquid crystal display cells of embodiment 4 drives the configuration example of driver.
Figure 55 is the key diagram of the picture overwrites mode of embodiment 4.
Figure 56 is the time diagram of the picture overwrites mode of Figure 55.
Figure 57 is the figure of reversal of poles mode of the liquid crystal cell drive waveforms of expression embodiment 4.
Figure 58 be embodiment 4 type of drive effect key diagram (one of).
Figure 59 is the key diagram (two) of effect of the type of drive of embodiment 4.
Figure 60 is the key diagram (three) of effect of the type of drive of embodiment 4.
Figure 61 is the key diagram as the jump of image writing mode (ス キ Star プ) type of drive.
Figure 62 is the processing flow chart of jump type of drive.
Figure 63 is the figure that writes the result first time in the expression 3 value writing modes.
Figure 64 is the figure that writes the result second time in the expression 3 value writing modes.
Figure 65 is the block scheme of configuration example of the automatic display unit of embodiment 5.
Figure 66 is the configuration example with the automatic display unit of wired connections such as terminal.
Figure 67 is the configuration example with the automatic display unit of wireless connections such as terminal.
Figure 68 is the configuration example with automatic display unit of contactless ic card.
Figure 69 is the figure of example of the information of the information of expression data preparation method and data presentation pattern.
Figure 70 be data update date the time showing pattern key diagram (one of).
Figure 71 be data update date the time showing pattern key diagram (two).
Figure 72 is the key diagram of automatic display unit of the picture of expression terminal etc.
Figure 73 is the key diagram as the automatic display unit of second display.
Figure 74 is the key diagram of the automatic display unit of advertisement data.
Figure 75 is the key diagram as the automatic display unit of meeting distribution data use.
Embodiment
Fig. 5 is the block scheme of the structural principle of information display system of the present invention.In the figure, system is made of display device 1 and video data holding device 2.
Video data holding device 2, for example portable terminal device have: storage part 6, preserve video data; With Department of Communication Force 7, at least in in-plant scope, send video data to display device 1 side accordingly with the memory contents of storage part 6.
That video data holding device 2 also has is 7 different with Department of Communication Force, can telecommunication, be used for obtaining the telecommunication portion of video data from the outside, Department of Communication Force 7 also can send to display device 1 side with the video data that is obtained by telecommunication portion.
In addition, video data holding device 2 can also have: display part has the viewing area littler than the display part on the display device 13; With mechanical handling portion, be used for display device 1 is installed in this device, perhaps, video data holding device 2 can also have and aforementioned same display part, simultaneously, display device 1 can also have and is used for video data holding device 2 is installed to mechanical handling portion on this device.
In addition, the short-range communication portion 4 on the display device 1 can also receive the electric power and the display control information that are used to show except receiving the data to be shown from video data holding device 2 side joints.
Display element of the present invention has dividing plate, and this dividing plate has the structure that the liquid crystal that is injected into two multiple colors between the substrate is not in contact with one another.
Dividing plate, relative with substrate face can have the bonding force with substrate, and the liquid crystal of multiple color can be a cholesteric crystal, and in addition, the phase additive color of the liquid crystal of multiple color can be white.
In addition, display device of the present invention has through pattern and reflective-mode, has: first display element, and can switching display content; Second display element of reflection-type shows still image or fixing literal, and can discern displaying contents by first display element.
Second display element can be printed article or the hand-written object that literal or image are arranged, can load and unload with respect to first display element, in addition, can have can be according to the still image on second display element removably or the fixedly position of literal and the function that shape changes indication range for first display element.
In addition, display device of the present invention has temperature compensation division, and this temperature compensation division changes peak value with 2 kinds of corresponding 2 kinds of driving voltage waveform of steady state (SS) of liquid crystal according to temperature.
This liquid crystal is a cholesteric crystal, can change peak value corresponding to the straight line of the mean value of the higher limit of the peak value of the drive waveforms of the mean value of the higher limit of the peak value of the drive waveforms that connects the temperature range lower limit and lower limit and range limit and lower limit with the corresponding drive waveforms of focal conic state.
In addition, display device of the present invention has the coil that is provided with in order to receive high frequency magnetic field from the outside, and has: show and use power supply unit, to carrying out rectification by this coil-induced HF voltage that goes out, provide demonstration voltage; With the logic power supply unit, to carrying out rectification by the coil-induced HF voltage that goes out, provide at show with beyond the voltage of circuit.
In this case, coil can have centre tap, one end ground connection of coil, connect the resonance capacitor between centre tap and the ground, logic is carried out rectification to resonance with the voltage at capacitor two ends with power supply unit, and demonstration is carried out rectification with power supply unit to the other end and the voltage between the centre tap of coil.
In addition, display device also has: display part, and accept electric power from the outside non-contactly and supply with, use this electric power to carry out data presentation; With the Presentation Function control part, with the Presentation Function that limits display part from the electric power quantity delivered of outside accordingly.
In addition, display device also has: show and use power supply, accept electric power from the outside non-contactly and supply with, and use the part of this electric power; Logic power uses this part, and the circuit beyond display part provides electric power; And current control division, reduce restriction accordingly with the voltage of logic power and show output current with power supply.
Display element drive method of the present invention is, in the array display device that uses cholesteric crystal, the part of scan electrode is set at the reset line of selection mode and the time-out line of writing line and nonselection mode respectively, on one side the conversion reset line, suspend line, writing line, on one side provide to the signal electrode side and to write data-signal.
In this case, at the reset line of selection mode and writing line write AC signal can with 1 line time corresponding in reversal of poles, have simultaneously and 2 line time corresponding cycles.
Then, display element drive method of the present invention is, in array display device, detect in the many lines in the display frame, many identical lines of data pattern to be shown, select detected many lines simultaneously, the data of identical patterns are offered signal electrode, and carry out writing in batch of identical patterns data, the inversely proportional relation of spatial frequency of the maximal value of the number of many lines that write in batch and identical patterns data.
In addition, in display element drive method of the present invention, use the wiring method comprise the steps: the view data of liquid crystal cell to be written is transformed to n gray shade scale (Bands Tone) view data; After conversion, extract the pixel of each gray shade scale level; For the pixel that extracts, form: the gray shade scale level n (being white level) that respectively that brightness is minimum gray shade scale level 1 (being black-level) and brightness n are low is transformed to black-level and white level and the subimage 1 that forms, will be from the minimum gray shade scale level 1 of brightness to brightness gray shade scale level translation the 2nd low gray shade scale level 2 be the subimage 2 that forms with gray shade scale level n combination behind the black-level, ..., to after being transformed to black-level, make up and the subimage (n-1) of formation the low gray shade scale level (n-1) of brightness (n-1) from the minimum gray shade scale level 1 of brightness with gray shade scale level n.This wiring method is from writing subimage 1, successively according to subimage 2 ..., the order of subimage (n-1) writes, and obtains the demonstration of n gray shade scale.
In addition, use the wiring method that comprises the steps: the view data that the view data of this liquid crystal cell to be written is transformed to n gray shade scale; After conversion, extract the pixel of each gray shade scale level; For the pixel of this extraction, form: the gray shade scale level n that respectively that brightness is the highest gray shade scale level 1 and brightness n are high is transformed to white level and black-level and the subimage 1 that forms, will be from the highest gray shade scale level 1 of brightness to brightness gray shade scale level translation the 2nd high gray shade scale level 2 be the subimage 2 that forms with gray shade scale level n combination behind the white level, ..., to after being white level, the gray shade scale level translation the high gray shade scale level (n-1) of brightness (n-1) make up the subimage (n-1) that forms from the highest gray shade scale level 1 of brightness with gray shade scale level n.This wiring method writes from subimage 1, successively according to subimage 1, subimage 2 ..., the order of subimage (n-1) writes, and obtains the demonstration of n gray shade scale.
Fig. 6 is the theory structure block scheme of display device of the present invention.In the figure, display device 10 has: display part 11, carry out data presentation; Storage part 12 is stored information relevant with the preparation method of data to be shown and the information relevant with the Show Styles of video data; With control part 13, according to the memory contents of storage part 12, the control video data is from the acquisition and the demonstration of video data on display part 11 of outside.Even can use cut off the electricity supply also can semipermanent ground or certain time proceed the display part of data presentation as display part 11.
In the display device 10 of Figure 10, control part 13 can with carry out the automatic startup of display device 10 accordingly from the outside or inner instruction that provides, and after obtaining video data from the outside and carrying out this demonstration end, can make display device 10 automatically be in holding state.
In addition, display device 10 can also have: data acquisition portion, obtain from the outside video data midway with the communication disruption of outside the time, when communication begins once more, obtain still NO video data; Rewrite prohibition unit, forbid the rewriting of data shown on the display part 11; With non-volatile memories portion, storage can data data presented, more than 1 page as display part 11.
Below embodiments of the present invention be divided into several embodiment describe.Information display device as embodiment 1 at first is described, is a kind of information display system, this system does not have power supply in the display side, but, for example use the electric power that sends simultaneously from wireless terminal side and data as contactless IC card, show in display device side.
Fig. 7 is the block diagram of first example of such display system.In the figure, system is made of wireless terminal 20 and radio display 21, and wireless terminal 20 has external wireless receiving and transmitting part 23, can and wireless receiving and dispatching terminal station 22 between exchange external wireless information.External wireless receiving and transmitting part 23 also can be the WLAN receiving and transmitting part.
Usually, wireless terminal 20, for example portable phone have little display.Show in order to amplify its picture, perhaps integrally carrying out big picture shows, use is as the radio display 21 of non-transformer display card, and has as being used for the mechanical installing mechanism 41 of the mechanical handling portion on the portable phone that radio display 21 is installed in, thereby can be integrated.At this moment, be provided for the receiving and transmitting part 37 of short-range communication near mechanical installing mechanism 41, this near field communication system has in the communication of carrying out video data, is provided for the function of the electric power that shows in radio display 21 sides.As its example, can utilize the wireless near field communication function of IC-card or RF (radio frequency) label etc.
Even can use for example cuts off the electricity supply also can keep semipermanently show state, for example cholesteric crystal described later is as storage property display part 40, but not necessarily semipermanently, also can use sustainable storage display medium that keeps show state during certain or general memory buffer and the display part of content thereof.
Fig. 8 is the block diagram of second example of the information display system of first embodiment.In the figure, show the view data of sending here from digital camera 43 in radio display 21 sides.That is, image 44 is by image pick-up device 45 shootings, and by the control of back displays device driving circuit 47, display image 44 on the back displays device 46 on the trailing flank that is positioned at digital camera 43 simultaneously, sends to radio display 21 sides by antenna 27 with these data.
Fig. 9 and Figure 10 are the key diagrams of picture display mode of the system of Fig. 7.In Fig. 9, wireless terminal 20, be on the display of portable phone video data, promptly show that A is for example under display 21 mechanically is installed in state on the portable phone 20, be sent to radio display 21 sides, even and under the state that radio display 21 is unloaded from portable telephone 20, also still carry out this demonstration.
Figure 10 is the key diagram of the video data of the wireless terminal 20 sides different pictures pattern different with the video data of radio display 21 sides.Show A in wireless terminal 20 sides, relative therewith, show B in radio display 21 sides.
Figure 11 is the key diagram of picture and selecting sending mode of the system of Fig. 7.At first, in wireless terminal 20 sides, selection will be to the picture A of radio display 21 sides transmission, by pressing the transmission button, the data of the picture A that selects are sent to radio display 21 sides, and in wireless terminal 20 sides, demonstration " can send " on display before this data transmission, demonstration " in the transmission " demonstration " demonstration end " in process of transmitting if transmission finishes.
Figure 12 be from the various terminals that comprise digital camera to the non-transformer display card, be the key diagram that the enterprising line data of radio display shows.Be not limited to digital camera, also the video data of portable phone or PDA can be presented on the non-transformer display card.For example, portable phone can be as illustrated in fig. 7, make the data that receive from the wireless base station or the data presentation that obtains by the Internet on the non-transformer display card.
Figure 13 is as wireless terminal 20, for example portable terminal device and radio display, is the key diagram of mechanical installing mechanism 41 of the mechanical handling portion of non-transformer display card.In the figure, on radio display 21, be fixed with leaf spring 50, this part inserted in the insertion section of portable terminal device side, thereby can be fixed on the radio display 21.Leaf spring 50 can be fixed on the insertion section side of portable terminal device, also can mechanical stiffening plate be set in radio display 21 sides.Because the junction surface does not electrically contact, even thereby because friction etc. cause some damages also no problem.Near installation portion, can be provided with and for example be equivalent to the solenoid 51 of short-range communication illustrated in fig. 7 with antenna 27.
Figure 14 uses spring 52,53 to replace the leaf spring 50 of Figure 13, and carries out machinery by insertion radio display 21 between this spring and install.
Figure 15 and Figure 16 are radio displays 21, are the key diagram of the mechanical installation portion of non-transformer display card side.On card 2 installation portions 54 are set, make display card vertically or laterally to install, Figure 15 represents the show state under vertical installation situation.Near the coil that has the antenna 36 that for example is equivalent to Fig. 7 two installation portions in addition, has the driver 55 and the control IC56 that are used to show on the card.Figure 16 represents radio display 21, is the show state under the horizontal installation situation of non-transformer display card.
Figure 17 and Figure 18 are the examples of the mechanical installing mechanism different with Figure 13～16.Here, use magnet magic strap 57 as installing mechanism, Figure 17 represents that the non-transformer display card is installed in the state on the wireless terminal (portable terminal device) 20.Figure 18 represents the state that the non-transformer display card unloads from wireless terminal 20, uses magnet magic strap 57 to replace the installation portion 54 of Figure 15.
Figure 19 is the example that radio display 21 is installed in the worn display system on western-style clothes etc. for example.With at radio display 21, be that the inboard of non-transformer display card is sticked magic strap 58 or display card itself is installed on the human body around the form on the arm, and make wireless terminal 20 near this display card, can on the display card that is installed on the human body, carry out picture thus where necessary and show.
For example, display card is installed on the arm, make portable phone near the state of ear under listening, and make the accessible phone of taking of knee-joint, on one side can watch the picture on the card to show thus, Yi Bian carry out session.In this case, can carry out big picture and show, not need to be used for the battery of non-transformer card, thereby have advantage in light weight, that volume is little.For example portable phone can be put into the pocket of chest, with display card during, detect the display card transmission of line data of going forward side by side, show thereby can carry out picture near chest.
Here, about radio display 21, be that the picture of non-transformer display card side shows and preferably to carry out the demonstration of still frame.This be because: at first, can proceed also to show that the common writing speed of such element is slow even for example cut off the electricity supply; And, because big picture shows that the self-information amount is many, usually use as still frame; In addition, if handle big image information with moving image then need very large power consumption.In addition, in general,, preferably carry out transmission and demonstration discontinuously to the non-transformer display card in order to reduce power consumption.For example, the data of carrying out 50ms send and demonstration, stop to send 100 seconds, just can reduce demonstration electric power significantly.
In claim of the present invention, first display unit is equivalent to the storage display part 40 of Fig. 7, the short-range communication unit is equivalent to antenna 36 and receiving and transmitting part 37, indicative control unit is equivalent to control part 35 and display part driving circuit 39, in addition, storage unit is equivalent to storage part 29, and communication unit is equivalent to antenna 27 and noncontact receiving and transmitting part 28.
In addition, the telecommunication unit of claim 2 is equivalent to external wireless receiving and transmitting part 23.The mechanical handling unit of claim 3 is equivalent to mechanical installing mechanism 41, and the display unit of claim 4 is equivalent to display part 31 in addition, and the mechanical handling unit is equivalent to for example installation portion 50 of Figure 13.
According to above-described embodiment 1, in use, usually the big view display of non-transformer that separates with movable equipment etc. is installed with movable equipment formation one such as portable terminal device, digital cameras, thus, realize big pictureization or many pictureizations by the hands-free picture of movable equipment that can make, and can after use, separate, utilize memory function utilization to still have the display result of the big picture of demonstration.
Particularly, by using the cholesteric crystal display element, can obtain the low and high-resolution color storage property demonstration of the passive drive type changed of film (Off イ Le system) easily of cost.Can under the situation of not utilizing printer, realize and utilize the same effect of result of removable printer prints, and can realize that the colour that utilizes removable printer to be difficult to realize shows or big pictureization.Particularly, require in the terminal of miniaturization at portable phone etc., the essence effect that big picture shows is very big.
In addition, can utilize the radio communication function of portable terminal device, come acquisition data or directory information, and the displayed record that can be used as big picture is preserved by the Internet.Put into school bag or pocket as long as will have the display of storage property Presentation Function, just can immediately carry out demonstration big picture, that see easily.In addition,, can overcome the existing shortcoming of utilizing the worn demonstration of battery etc., be that weight or volume are big, maybe need charging etc. by the non-transformer display card is installed on the human body.
Then, as the embodiment 2 of embodiments of the present invention, illustrate as the cholesteric crystal display element of the representative display medium that under the state of cutting off the electricity supply, can proceed to show and use the display device of this display element.
The character of cholesteric crystal is described at first, prevailingly.Cholesteric crystal optionally reflects the light of certain wavelength coverage, and levying nematic liquid crystal as its a kind of hand is by add the liquid crystal that chirality material (hand is levied material) forms cholesteric structure in nematic liquid crystal.Cholesteric crystal can obtain as the flat state of reflective condition with as these two kinds of steady state (SS)s of focal conic state of the state of seeing through by electric control, and this flat state and focal conic state only have otherwise apply the storage that any external force just can semipermanent preservation.
Figure 20 and Figure 21 are the flat state of cholesteric crystal and the key diagram of focal conic state.In using the display device of cholesteric crystal, two states is controlled in the switching of the directed state by carrying out liquid crystal molecule.Figure 20 represents the flat state of the light in the selective reflecting particular range of wavelengths.Under this flat state, selective reflecting is along the helix pitch (ピ Star チ) of liquid crystal molecule and the circularly polarized light of spiral sense of rotation.The maximum wavelength X of reflection is utilized mean refractive index n, the helix pitch p of liquid crystal and is provided by following formula:
λ＝n×p
Zone of reflections Δ λ becomes big along with the increase of the refractive index anisotropy Δ n of liquid crystal.
Figure 21 represents the focal conic state.Under this state, incident light all sees through basically, is pellucidity.Therefore, if the layer of random color is set, then under the focal conic state, can show this color below liquid crystal layer.Therefore, for example be made as near the 550nm, and light absorbing zone (black) is set below liquid crystal layer, just can on the black background look, carry out green monochrome and show by catoptrical wavelength band with flat state.
Figure 22 is the example of the reflecting spectrum of cholesteric crystal.By share the different plurality of liquid crystals element of the zone of reflections (blue, green, red), can carry out panchromatic demonstration on the principle.In addition, owing to be a left side or right either party's circular polarization reflection of light, so reflectivity is in theory near 50%.
Figure 23, Figure 24 are the key diagrams at the general drive waveforms of cholesteric crystal.Come cholesteric crystal is driven by applying pulse voltage.If apply highfield, then the spiral structure of liquid crystal molecule is untied, and all molecule becomes vertical (the ホ メ オ ト ロ ピ Star Network) state corresponding to direction of an electric field.
In Figure 23, for example applying ± pulse of 40V after, remove electric field, form the screw axis spiral structure vertical of liquid crystal molecule, thereby become and the helix pitch flat state of selective reflecting light accordingly with electrode.
In Figure 24, for example applying ± pulse of 24V after, remove electric field, promptly, remove under the situation of electric field after having applied the weak electric field that the screw axis that do not make liquid crystal molecule unties fully, the screw axis of liquid crystal is parallel with electrode, thereby obtains seeing through the focal conic state of incident light.Relative therewith, if after the electric field that has applied medium tenacity, remove this electric field, just obtain the state that flat state and focal conic state mix mutually, thereby can carry out the demonstration of Neutral colour.
Figure 25 has concluded the response characteristic of cholesteric crystal.In the figure, V
F0Be the threshold voltage of beginning, from V to the focal conic state transitions
F100aTo V
F100bBe the voltage range that becomes the focal conic state fully, V
P0Be the threshold voltage that beginning is shifted to flat state, V
P100It is the threshold voltage that becomes flat state fully.In original state is under the situation of flat state, if improve pulse voltage, then just becomes the rotating band to the focal conic state transitions within the specific limits, if further improve pulse voltage, then becomes the rotating band that shifts to flat state once more.In original state is under the situation of focal conic state, along with the raising of pulse voltage, gradually becomes the rotating band that shifts to flat state.
Figure 26 is to use the configuration example of the reflection type liquid crystal display element of cholesteric crystal.In the figure, inserting ITO (indium tin oxide) electrode 61, display layer 62 and light absorbing zone 63 in the inboard of substrate 60, display layer 62, is that liquid crystal layer utilizes encapsulant 64 its two ends of sealing.
Figure 27 is to use the key diagram of the example that the segmentation of cholesteric crystal shows.For example, in the end in the demonstration of " 3 ", (2) and (5) part driven be the focal conic state, other the part of (1), (3), (4), (6) and (7) is driven be flat state, show thus.
The structure of the display element that uses cholesteric crystal is described.The monochrome that cholesteric crystal shows certain tone basically shows, if two kinds of liquid crystal doping are just mixed at an easy rate, thereby can not reflect the tone of hope.That is,, just become Neutral colour or no reflection events state if two or more liquid crystal mixes.Therefore, in relative a pair of matrix base plate dividing plate is set, becoming with neighbor or point is the immiscible separation structure of plurality of liquid crystals of unit, and injects various liquid crystal from different inlets.
As the method for separating liquid crystal, also use the pod membrane that liquid crystal is enclosed in the pod membrane to construct, but because the influence of the thickness of the interface of pod membrane and pod membrane, the contrast reduction and the driving voltage that can cause causing owing to stray light rise, thereby undesirable as display device.In addition, the pod membrane of hope is configured in the pixel of hope also very difficultly, and in embodiment 2, constructs, can realize high-contrast and low cost by adopting the separation that forms by dividing plate.
The liquid crystal of Figure 28 representing matrix substrate separates structure.All be suitable for for active type matrix base plates such as passive simple matrix substrate, TFT.In embodiment 2,, express the example of the separation structure that is used to insert 2 kinds of liquid crystal as the example of passive simple matrix substrate.In order in adjacent point, to insert 2 kinds of liquid crystal, on every line of the electrode 61 of downside substrate 60 sides, form dividing plate 62.The relative substrate 60 of upside has the electrode wires of quadrature, can drive by realization matrix.Dividing plate 62 is the resins that are not dissolved in liquid crystal, can form by photoetching process.Though dividing plate 62 can be close on the relative substrate by making the unit inner pressure relief, preferably makes separator material have cementability, thereby can make relative substrate fixing tightly, improve permanance thus.Separator material is a resin material, can be by pressurization, heat treated and relative substrate bonding.
Figure 29 represents the separation graph of two kinds of liquid crystal 63,64.Two inlets are set, so that various liquid crystal does not mix.Method for implanting as liquid crystal, generally be, immerse liquid crystal in a vacuum and preserve in the container, return to atmospheric pressure then and finish to inject.Therefore, two inlets must be formed on the difference end of empty liquid crystal cells.Injecting program is, after injecting a kind of liquid crystal, utilizes encapsulant 65 to carry out encapsulation process, injects another kind of liquid crystal then.As shown in the figure, can insert different liquid crystal at adjacent every strip electrode line.Can carry out multicolor displaying and additive color mixture by the line that drives regulation shows.
Figure 30 represents to use the dot structure under the situation of two kinds of liquid crystal 63,64 of Figure 29.As display element, preferably carry out white and black display, so 2 kinds of liquid crystal are the complementary color relation, so that additive color mixture is a white.For example, with the orange and blue reflected light that is made as cholesteric crystal, can produce white.In Figure 30, form pixel (pixel) 67 by orange and blue two points 66 (sub-pixel).Have medium reflectivity though apply the reflected light that voltage can make cholesteric crystal by adjusting, show thereby can carry out gray shade scale, stable drive form is 2 values demonstrations (reflectivity max and min).If 2 value demonstrations just can relax because the precision of the drive condition of the light and shade that the thickness difference of liquid crystal causes or two kinds of liquid crystal.And the line that is equivalent to the electrode 61 of upside substrate 60 sides among Figure 28 with the corresponding horizontal partition of the division of liquid crystal pixel 67 drives unit.
Therefore, as shown in figure 31, further cut-point forms son point 68.By driven element point individually, can carry out gray shade scale and show.In Figure 30, be white, black, orange, blue 4 kinds of colors, but in Figure 31, can carry out 9 kinds of colors and show.
In addition, in Figure 30, Figure 31, the drivable least unit of each point or son point can be driven demonstration as virtual pixel unit.Do not need special the processing just can form high-precision image, but because image, a kind of point of color is continuous, just forms orange or blue spot.Therefore, under the situation of display image,, carry out Flame Image Process and make that the number of two kinds of colors lighting is roughly the same, can show high-precision black white image thus at certain area, for example in the scope of several squares of mm.For example, under orange continuous situation, the demonstration of blue dot will be transformed near the orange point.This method is considered as virtual pixel with point, thereby can be the high precision display mode at white and black displays pattern down conversion.
Figure 32 represents to use 69,70,71 o'clock embodiment of three kinds of liquid crystal.It is the insertion example of cholesteric crystal that presents the reflection of trichromatic R look, G look, B look.It is very difficult inserting three kinds of liquid crystal in a planar substrates discretely, but in order to realize lattice array shown in Figure 32, as long as form by a kind of liquid crystal (Y) 70 is alternatively injected other two kinds of liquid crystal (Z) 69 and (X) form between 71, have an X, Y, Z, Z, Y, the line structure of the lattice array in the cycle of X just can insert three kinds of liquid crystal in the substrate on a plane.In lattice array, these two kinds mutual configurations of the pixel of RGB and the pixel of BGR.For the G look, because the resolution height of people's sensation, therefore only the point of G look uniformly-spaced disposes.For R look, B look, because the resolution of people's sensation is low, so also problem is little even unequal interval disposes.In order to prevent to mix, inlet is configured in each different ends.
Figure 33, the further cut-point of 34 expressions form sub-point, realize the example that high resolving power and gray shade scale show.Show if suppose the same 2 values of carrying out, then in Figure 33, can carry out 8 looks and show, in Figure 34, can carry out 64 looks and show with Figure 30.In addition, in Figure 33, Figure 34,, just can equally similarly form high-precision image with Figure 30,31 as long as the drivable least unit of each point or son point is driven demonstration as virtual pixel unit.Also can utilize Flame Image Process to be transformed to the high precision display mode of black white image.
Below, illustrate and made up display element that uses cholesteric crystal and the display device of using the printed medium of paper or photo.As previously mentioned, cholesteric crystal exists as the flat state of selecting reflective condition and these two kinds of steady state (SS)s of focal conic state of essence pellucidity.Usually, light absorbing zone (black layer) is set below liquid crystal cell, carries out the dark demonstration of the bright of reflective condition and the state of seeing through.
But,, can be the background of identification liquid crystal cell under the focal conic state in pellucidity then if light absorbing zone is not set in cholesteric crystal.Therefore, utilize the pellucidity under this focal conic state, realized with printed medium, be generally the fusion of paper medium, the liquid crystal indicator of applied range can be provided thus.
For example, the Application of Electronic Paper example as can semipermanent showing has proposed restaurant menu demonstration etc., all is variable demonstration but needn't make the Zone Full at menu.For example, the commodity image generally can be fixing the demonstration, but in order to improve image quality, preferably uses photo.Preferably use variable demonstration for the special selling product on the price that should show together or the same day etc.Therefore, in embodiment 2, will be as photo of printed medium etc. with the Electronic Paper medium, for example use the display element of cholesteric crystal to overlap, thus realized overlapping display format as a whole.The commodity image has the authenticity of height as printed article, and price or special price advertisement etc. can easily change its content by using Electronic Paper, thereby can realize the fusion of paper and Electronic Paper.
For example, be designed to the matrix display type, just can realize and the corresponding suitable demonstration of the displaying contents of printed article by the Electronic Paper that will use cholesteric crystal.By making the printed article templating, can consider the more applications form.For example, use calendar as printed article, and utilize the demonstration that overlaps the Electronic Paper on this calendar, can realize the changeable type schedule.
Figure 35 represents the fixing printed article (photo) that shows and uses the overlapping demonstration example of the changeable type display element of cholesteric crystal.Changeable type display element 75 is overlapped on the surface of printed article 74.This changeable type display element does not form light absorbing zone.Figure 36 represents show state.The display element 75 that is positioned on the printed article 74 presents through pattern (focal conic state) (left side) and reflective-mode (flat state) (right side).When shining on the display element as the incident light 77 of illumination light, seeing through under the pattern (left side), former state is thrown light on the printed article, is reflected with the corresponding reflected light 78 of the image of printed article, by seeing through the display element of pattern, is identified to former state.That is, but the printed article former state be identified.Under reflective-mode (right side), be reflected with the light of the corresponding wavelength of interlamellar spacing of cholesteric crystal, other light transmission liquid crystal shines on the printed article.Be reflected the liquid crystal of penetration pattern with the corresponding reflected light of the image of printed article.Therefore, the reflected light 79 of liquid crystal and the reflected light 78 of printed article are overlapping, form display light 80.Realized the fusion of the display element of the printed article of the paper medium that picture quality is good and variable display medium.
Liquid crystal presents and the corresponding color of interlamellar spacing.Therefore, can be difficult to identification, therefore must the printed article zone of carrying out variable demonstration be taken in owing to the color of lower floor's printed article.But, in order to improve observability by improving contrast, this zone of printed article can be a black.Perhaps, reduce reflectivity the grey, also can improve observability by resembling.In addition, by making this area coloring, and make reflected light 78 be particular color, can form the additive color mixture with display element reflected light 79, thereby change color.For example, the reflected light 79 of display element is set at orange, it is blue making printed article, thereby shows that look just be white.By the various of printed article are elaborated, can provide change color to each zone.White is optimal demonstration look.In order to realize that white shows, can be that complementary color concerns and realizes by catoptrical color settings with the color of printed article and display element.Orange and blue is that complementary color concerns.
Figure 37 represents that menu or catalogue etc. are an example of purpose with merchandise sales.Use the good printed article of display quality as the commodity image.For example, at the restaurant in, printing seems delicious image and fixes demonstration.Other demonstration, mainly be that character shows, utilize the changeable type display element to carry out.The printed article of the underclad portion of changeable type display element 75 partly is the good printing decorative patterns of observability such as black.Can hypothetical price, various demonstrations such as the appointment of sell at a special price product, lunch menu, the bulletin of business hours, advertisement show as character.By the online demonstration that changes the changeable type display element (オ Application ラ イ Application), can consider various application.For example, the custom menu that can provide change, the advertisement demonstration that combines with the guest, group discount, women's discount, family's discount demonstration, member's discount, the place discount points of the price fixing that combines with the time period, tank farm stock adjustment, the product of selling at a special price to combine then and there with the guest.Also can amplify demonstration then and there for the old man.As the commodity image, show the authenticity preferable image.
Example shown in Figure 38 is the example of this restaurant menu.Below image, set variable viewing area, show price.Figure 38 is the exploded view of Printing Department and variable display portions.Changing commodity, changing under the situation of image, can only change printed article.Printed article can easily load and unload.Variable display element is the matrix type display element, and the layout that therefore can easily deal with printed article changes.
Figure 39 changes Figure 37,38 printed article, forms the example of schedule.Printed article is a calendar, writes plan on the changeable type display element onlinely.As long as online,, simultaneously, can also see a plurality of people's plan even Planning Change also can write at any time.Even planned change also can reflect immediately.Can also realize universalization and information sharing, thereby realize effectively management.If month changes, then, form new schedule by loading and unloading, replacing printed article.In addition, if want to write, also can carry out hand-written writing afterwards to printed article by loading and unloading by hand-written.The changeable type display element is identical with Figure 35～38, is matrix display element, so can easily carry out changing with the corresponding layout of printed article.On printed article, consider ground, viewing area printing decorative pattern.The decorative pattern that schedule display part formation black or grey or complementary color etc. are found out easily.
Figure 40 is illustrated in the example application of using in the map demonstration.Structure is identical with Figure 39 etc.Printed article is arrangenent diagrams such as road-map, meeting-place index map, architectural plan, and variable display portions can be represented present position, destination indication, pass through history etc.Also can show the advertisement that combines with the destination.Have only online just can the demonstration to pass through predetermined instant.When big change is arranged in the destination very much, place the map of new printed article by the loading and unloading printing thing.If use this display device, just can form indicator board very easily.In Figure 40, the example of indication such as the meeting-place of expression activity (イ ベ Application ト) etc.Can change printed article and distribution according to guest's difference.If the lift-launch wireless display system then can show the present position at every turn by each the time.Can also show near the useful information that the present position is.
Figure 41 is and reference book, example that workbook is corresponding.Printing issues on printed article shows answer, explanation afterwards.Because can read answer, explanation then and there, so understand easily.Under the situation that changes problem, can load and unload, change printed article.Figure 41 is the example of workbook.Different with the display of personal computer, be reflection display device, even long-time study is also seldom tired, and can understand effectively.
Figure 42 shows corresponding example with employed simulations such as financial institution such as bank or insurances.On printed article, print joint project, and client's customization numerical value on-line dispaly.Because can obtain analog result then and there, thereby explanation with being readily understood that.Under the situation that changes commodity, can load and unload, change printed article.Figure 42 is the example of the loan simulation of bank.Under life insurance announcer's situation, be with notebook computer to go to the customers' place sometimes, to the guest demonstration of computing machine is described, but extremely difficult identification is difficult to make the client to understand.If use the display device of embodiment 2, then observability is good, and the client can easily understand explanation.
As mentioned above, medium according to embodiment 2 in the matrix display element of using cholesteric crystal, can realize multicolor by the liquid crystal that injects multiple color.Compare with stromatolithic structure,, can realize the reduction of cost by using the parts that the interface is few, have high-contrast, simplification.
In addition, by with the cholesteric crystal matrix display element as variable display element and combined with printed article as fixing display element, can realize the fusion of Electronic Paper and paper, thereby can bring into play the feature of Electronic Paper and the feature of paper to greatest extent.Only, just can develop various application modes by making the printed article templating, loading and unloading and the change template content with respect to variable display element.By making the template fulfillment databaseization of printed article, can immediately carry out layout change, content changing, the renewal of display element.Variable display element can repeatedly use, and has reduced cost.Fixedly display element also can hand-writtenly replace printed article, in addition, also can carry out overlapping demonstration by overlapping cholesteric display element on the drawing on the building walls.
The following describes embodiment 3.In the present embodiment, under the situation of for example using the such non-transformer display card of embodiment 1 in order to realize semi-permanent data presentation, for example the electric power amount that is provided by contactless IC card card reader/writer etc. is less, so, need to use various control modes at power circuit.The control of such power circuit is illustrated as embodiment 3.
As the explanation among Figure 23, Figure 24,, need two kinds of magnitudes of voltage of difference corresponding flat state and focal conic state in order to drive cholesteric crystal.And the plane driving voltage is about 40V, compare with other display element, and be quite high value.If use for example general DC-DC converter, then need the big capacitor of electrostatic capacitance of μ F level, and with power circuit design thickness 1mm with interior, be the non-transformer display card thickness with interior be unusual difficulty.
Therefore, in embodiment 3, do not use the DC-DC converter, but in contactless IC card or RF label, use such power circuit: utilize employed high frequency magnetic field in the supply of signal and electric power, come by the high voltage about ultrathin circuit generation 40V.
Figure 43 is the example of such power circuit.This power circuit double as show usefulness, for example use power supply at the logic of liquid crystal driver and at element itself, be the demonstration power supply of cholesteric crystal.
In Figure 43, by for example inducing on coil voltage, that have inductance L tap T is being set from the high frequency magnetic field of contactless IC card side, one end ground connection of coil, between centre tap T and ground, connect resonance electricity consumption container C 1, provide logic voltage via half-wave rectifying circuit, in addition, between the other end of coil and centre tap T, do not connect the resonance capacitor, but provide demonstration voltage by half-wave rectification.Like this, use capacitor, can reduce the influence of manufacture deviation, thereby galvanic current power can be provided by only between centre tap that takes out logic usefulness voltage and ground connection, connecting resonance.
Figure 44 be in Figure 43, be provided with independently respectively logic with and show and to replace being provided with centre tap with power supply.In the drawings, top circuit is the logic power circuit, and can think that the lower part that makes Figure 43 is independent.Usually, the value that is used to accept the L1 that electric power supplies with in contactless IC card is for example about 1.4 μ H, for example uses 100pF as C1, thereby can obtain 5V as logic voltage.If use the DC-DC converter,, need the capacitor of μ F level as previously mentioned though can use supply voltage by making this boost in voltage obtain showing for this reason.Therefore, for example use supply voltage by using L2=4～5 μ H to obtain showing.
Then, in passive matrix driving circuit for example, must apply with plane and focal conic to the liquid crystal cells on the sweep trace that is in the selection level and drive corresponding voltage, and, irrespectively apply the voltage that makes the state that when selecting, writes not have variation to the liquid crystal cells on the sweep trace that is in non-selection level with the level of section line (セ グ メ Application ト Line).That is, generally need apply and be used to the voltage that suppresses to crosstalk, for example commercially available stn liquid crystal driver LSI needs 5 kinds of magnitudes of voltage.
Figure 45 is the configuration example with so corresponding power circuit of situation.Logic identical with among power circuit and Figure 44, but the circuit that is to use the power circuit multistage that utilizes voltage multiplying rectifier to be connected in series is used power circuit as showing, the power circuit shown in the downside of replacement Figure 44.In the circuit that this multistage connects,, can provide for example 5 kinds of voltages by take out the voltage of suitable position according to essential magnitude of voltage.In addition, can also use half-wave rectifying circuit, full-wave rectifying circuit as this rectification circuit.And, in the circuit of Figure 43～Figure 45, prevent under the superpotential situation at needs, by between voltage output end and ground, inserting Zener diode side by side, can improve the reliability of power supply.In addition, in Figure 45, show with in 4 coils of mains side, L2 and L4 reel along same direction, and L3 and L5 are along reeling in the opposite direction with this side.By test findings as can be known, by using the different coil of such coiling direction, can produce high voltage.
Then, for example using under the situation of contactless IC card as the non-transformer display card, from the supply capability amount of contactless IC card card reader/writer different altering a great deal owing to the distance between machine, card reader/writer and the card of card reader/writer etc.Therefore, if the display part on the ongoing operation card is then compared with the common contactless IC card that does not have display part, communication distance may significantly shorten, and perhaps may cause fluctuation of service owing to power shortage in the communication.Therefore, in embodiment 3,, limit Presentation Function according to the electric power quantity delivered corresponding to such situation.
Figure 46 be according to for example from the corresponding demonstration of the electric power quantity delivered power supply input voltage value of card reader/writer side, block configuration example all sidedly to the circuit of the electric power of display part supply.In the figure, come from by to showing that the voltage that carries out the VR1 that dividing potential drop forms with power input voltage compares by comparer (CMP1) and reference voltage, is showing that CMP1 is output as high level (H) under the high situation of usefulness power input voltage.The circuit that is made of TR1, TR2 and R1 is general current limit circuit, is under the situation of H in the output of CMP1, provides demonstration to export with power supply, but is under the situation of low level (L) in the output of CMP1, and blocking-up shows and exports with power supply all sidedly.By suitably setting reference voltage,, block electric power supply all sidedly to display part though promptly show with power input voltage in contactless IC card chip action electric power quantity delivered and to utilize this circuit under the situation near value that should essential value reluctantly.
Figure 47 is used for according to for example to the electric power quantity delivered of contactless IC card, prolongs the configuration example of clock output circuit of the drive cycle of display part fifty-fifty.This circuit is such circuit: must value compare enough big what the electric power quantity delivered with the necessary minimum value of contactless IC card chip, promptly was used to operate, and than under the little situation of the average necessary amounts in display part when work under the steady state (SS), prolong the clock period fifty-fifty according to the electric power quantity delivered, postpone the drive cycle of display part.
In Figure 47, under the situation little with supply voltage by the demonstration after the VR2 dividing potential drop, CMP2 is output as L, stops as the clock output of the output of door AND1.For example, the demonstration that illustrates in Figure 44 is with in the power circuit, if clock stops, electric power is supplied with and is blocked, then capacitor C3 is recharged, and shows with supply voltage and recover that clock is exported once more thus.By repeating such operation, the clock period, be that the drive cycle of display part postpones fifty-fifty.
Figure 48 be used for according to the electric power quantity delivered display part only the display text data, the image of display image data shows the configuration example of the output circuit of inhibit signal.This circuit is such circuit: bigger than the essential value of contactless IC card chip in the electric power quantity delivered, and with steady state (SS) under average must value the comparing under the quite little situation in display when work, display text data only in display part, display image data does not limit Presentation Function with this.In the figure, with under the little situation of power supply voltage ratio reference voltage, CMP3 is output as H by the demonstration after the VR3 dividing potential drop, and output image shows inhibit signal.
Below, the electric current restriction that shows with power supply is described.For the cholesteric crystal display panel of passive matrix, can utilize existing passive matrix stn liquid crystal driver LSI to drive by utilizing aforesaid power circuit.Except when starting, it is all smaller to consume electric power, can utilize the electric power that is provided by the contactless IC card card reader/writer with faint output etc. to operate fully.But,,, flow through great momentary current (during stable operation 5～10 times) under the transition state when starting so the transistorized conduction impedance of terminal section is low because so existing driver LSI is shown as prerequisite with moving image.Therefore, even the electric power of several times when stable operation is provided also possibly can't start existing driver LSI.
But only preparing the big power supply of supply capacity in order to start when is very disadvantageous aspect cost.To supply be impossible to 5～10 times electric power when in addition, utilizing existing, as to have faint output contactless IC card card reader/writer etc. that stable operation is provided.Therefore, in embodiment 3,, show electric current restriction with power supply for the supply capability of the consumption electric power with as far as possible near stable operation the time stably starts existing driver LSI.
Figure 49 is the configuration example that shows with the current limit circuit of power supply.In the figure, preestablish the value of VR1 etc., so that under the voltage of logic power is situation below the setting, carry out the electric current restriction, thereby under 5% the situation of the value value of being above standard that can reduce at the voltage of for example logic power, to showing that carrying out electric current with power supply limits.
In addition, when starting, showing with supply voltage is generally dull in time increases, so, use the circuit identical with Figure 47, stop clock output, up to showing that the magnitude of voltage with power supply surpasses setting, can stablize and promptly start existing driver LSI thus.In this case, different with explanation to Figure 47, just because of show with supply voltage is dull and increase, so, stop clock up to this value above setting for example standard value 95%.
In existing liquid crystal driver LSI, even be not when starting sometimes, since display pattern, the average current when the display power supply electric current substantially exceeds stable operation.Return to setting by the driving that similarly limits electric current when starting at this moment, interrupts display panel up to display power supply voltage, can stably operate existing driver LSI.
Then, temperature compensation in the drive characteristic of cholesteric crystal of embodiment 3 is described.For cholesteric crystal, two kinds of drive waveforms that need be different with the corresponding peak value of focal conic state with the plane.And this peak value changes along with temperature.Therefore, in order to widen operating temperature range, need carry out temperature compensation according to the temperature change peak value.In embodiment 3, change point-blank according to temperature by the peak value that makes drive waveforms, can guarantee the surplus of the peak value in wide operating temperature range.
Figure 50 is the example of the peak value of the plane of cholesteric crystal under the situation of pulse width 10ms and focal conic drive waveforms.Because more than certain peak value, must be flat state, so, use and the corresponding curve representation of lower limit with the corresponding peak value of flat state.Relative therewith, only in the voltage range of certain peak value, carry out to the variation of focal conic state, use with higher limit and corresponding two curves of lower limit and represent so drive corresponding peak value with focal conic.
In Figure 50, the peak value corresponding with the focal conic state be along with temperature has bigger variation, so, be used for carrying out diminishing to the surplus of the peak value of the driving of focal conic state temperature independently.
Relative therewith, be known that if the lengthened pulse width then the surplus that drives corresponding peak value with focal conic becomes big.Drive the example of corresponding peak value under the situation of Figure 51 indicating impulse width 50ms with plane and focal conic.The surplus of peak value is compared with the situation of the pulse width 10ms of Figure 50, be its several times, but display speed is reduced to 1/5.
Figure 52 is illustrated among the embodiment 3 respectively according to temperature and changes point-blank in opereating specification that the plane drives and focal conic drives the example of peak value of the drive waveforms of these two kinds of drivings.Compare with Figure 50, between the upper and lower bound of focal conic state, express three lines, but its central line be connect with the lower limit of operating temperature range, promptly the higher limit of the corresponding peak value of focal conic state under 0 ℃ and lower limit on average and the upper limit of operating temperature range, the i.e. higher limit of the peak value under 50 ℃ and the average straight line of lower limit.
In embodiment 3, corresponding with temperature, basically utilize this central straight line to change the peak value of the drive waveforms corresponding with the focal conic state, but its surplus is between the corresponding higher limit of focal conic state and lower limit that can enter original and Figure 50 under each temperature, thereby compare with the surplus among Figure 50, it is big that new surplus becomes.That is, in corresponding aforementioned three straight lines of focal conic state, the upside straight line is represented the maximal value of the peak value in the surplus, and the downside straight line is represented the minimum value of the peak value in the surplus.With the value in these three corresponding surpluses of straight line be 25.4V 0 ℃ of following minimum, be 32.6V to the maximum, average out to 29.0V.Minimum is 15.9V under 50 ℃, is 23.7V to the maximum, average out to 19.8V.
In Figure 52, peak value as the drive waveforms under the flat state among the embodiment 3, for example can be made as make under the uniform temp, add setting with the peak value of the corresponding drive waveforms of focal conic state or multiply by setting and the value that obtains, thereby can corresponding temperature change.This characteristic line with the upside that is positioned at flat state in Figure 52 is represented.And the value of this line under 0 ℃ is 49.3V, this be with corresponding three lines of focal conic state in 1.7 times of mean value 29.0V.In addition, the value under 50 ℃ is 33.66V, is 1.7 times with the corresponding mean value 19.8V of focal conic state.
Figure 53 is that the plane that illustrates in Figure 52 drives and the configuration example of the temperature-compensation circuit of the voltage peak of focal conic driving.In the figure, AMP1, the magnification that promptly is provided with the amplifier of temperature sensor output equal R2/R1, and this value is 1.7.
The output of sensor under the uniform temperature is carried out computing by not shown computing circuit, the output valve under setting 0 ℃ and 50 ℃, make its equal with Figure 52 in the focal conic that illustrates drive in corresponding three lines, represent the value of the line of mean value.That is, sensor output value is 29.0V under 0 ℃, is 19.8V under 50 ℃.Therefore, AMP1 output is 49.3V under 0 ℃, is 33.66V under 50 ℃.These values equal with Figure 52 in the value of the corresponding temperature compensation characteristic straight line of flat state that illustrates.
TR1 and TR2 are configured for the emitter follower circuit that makes output impedance enough low, each emitter voltage, are that the output valve of plane voltage and focal conic voltage is than the low about 0.7V of each transistorized base voltage.Therefore, the plane voltage output value under 0 ℃, be approximately 48.6V (=49.3-0.7), under 50 ℃, be approximately 33.0V (=33.66-0.7), these values and the minimum of the peak value of the driving voltage waveform of corresponding flat state, promptly with Figure 50 in illustrate the corresponding minimum voltage of flat state, promptly the 43.3V under 0 ℃ compares with 30.9V under 50 ℃, is sufficiently high value.
The base voltage of TR2 is to make the R4 of output voltage of AMP1 doubly divided by the value that obtains after (R3+R4).The value of this coefficient equals 1/1.7, the emitter voltage of TR2, be the output valve of focal conic voltage under 0 ℃ be 28.3V (=29.0-0.7), under 50 ℃ approximately be 19.1V (=19.8-0.7).These values are represented with three straight lines that illustrate among Figure 52, compare with the minimum voltage (25.4V and 15.9V) of corresponding focal conic state enough greatly, and compare enough little with maximum voltage (32.6V and 23.7V).
In addition, corresponding with the operating temperature of liquid crystal cells as previously mentioned, change the peak value with the corresponding drive waveforms of focal conic state point-blank, thereby when pulse width is 10ms, also can guarantee identical surplus under the situation with pulse width 50ms.That is,, also can guarantee identical value as the surplus of peak value although display speed is made as 5 times, thus can operation stably in wider temperature range in the display device of using cholesteric crystal.
Abovely power circuit, Presentation Function restricting circuits at contactless IC card for example have been described, have shown with the temperature-compensation circuit of power supply current limit circuit, cholesteric crystal driving voltage etc. as embodiment 3, but these circuit are actually several combinations to be got up to use, rather than uses independently respectively.About its combination, the form that can accept or reject as required, select several circuit to be used as making up.
In addition, the value of the value of the element in each circuit or reference voltage can be determined with comparalive ease.For the temperature-compensation circuit of Figure 53, understand determining etc. of resistance value in detail, but the operation note of the current limit circuit that for example illustrates among Figure 49 is in general handbook etc., thereby can easily determines the value etc. of element.
As mentioned above, according to embodiment 3, can realize reduction of cost significantly and slimming at the power circuit of the display panel that for example uses cholesteric crystal, in addition, by limiting Presentation Function accordingly, can avoid the instability of the shortening or the action of communication distance with the electric power amount of supplying with, in addition, demonstration when starting by restriction can stablize and promptly start existing driver LSI, thereby can enlarge the range of application of movable equipment significantly with the electric current of power supply.
Then, as embodiment 4 explanation semi-permanent storage display elements, for example use the driving method of the liquid crystal cell in the display device of cholesteric crystal and method for displaying image etc.Explanation is used the display device of for example having utilized the cholesteric crystal element for non-transformer ground in embodiment 4, and carries out the driving of liquid crystal cell or type of drive and the method for displaying image that image shows with the least possible form of power consumption.
Figure 54 is the block diagram that is used to drive the driver of liquid crystal display cells, for example matrix type liquid crystal cell among the embodiment 4.The structure of this driver itself is basic identical with for example commercially available existing STN generic drive.The present invention does not have special structure, is characterised in that its driving method in embodiment 4.
In Figure 54, the electric power and the data that send from the wireless terminal 20 that sends electric power or data or IC card reader/writer etc. are received by power acceptance division 81, corresponding with this reception result, carry out the control of signal conversion circuit 83 by signal control circuit 82, thereby the driving of carrying out matrix type liquid crystal cell 84 shows.
Matrix type liquid crystal cell 84 generally has the scan electrode that is used for selection wire and is used to provide the signal electrode of data, the drive signal that is provided for making liquid crystal cell to the scan electrode side is for the polarity inversion signal FR that exchanges, as the Eio signal of line options signal, and be used for the Lp signal that latchs the conversion of carrying out sweep trace of the data of signal electrode side etc.Except providing RF signal, the Lp signal, also be provided for data-signal that writes etc. to the signal electrode side.
Usually provide the Eio signal that carries out the selection of scan electrode in order to write data to the scan electrode side with beginning line-by-line, this pattern is called general mode here from uppermost line.Relative therewith, also can provide the signal that is called as segmented model, this pattern does not write from the top with beginning line-by-line, but in order to write data and selection wire to free-throw line, also is provided for switching the switching signal of these two kinds of patterns in addition.
Figure 55 is the key diagram of the picture overwrites mode of embodiment 4.In the prior art, when picture overwrites, the mode that general using resets the display frame of front in batch, but in this mode, at least consume the electric power of tens of mW when resetting, for example in contactless IC card, and compare very greatly from the electric power of IC card reader/5～10mW that the writer side provides, thereby be difficult to be carried out to the reply position in the display device side that does not have power supply.
Therefore, in embodiment 4, can be whenever several line ground, for example per four line ground reset, simultaneously, repeat the operation that the data of a line write by the line number, carry out the rewriting of picture with this, thereby suppressed consumption electric power, for example do not use whole pixels to use data as resetting in addition, be used to reset and will write data itself as the so special reseting data of white.
In Figure 55, the latter half of picture is represented picture displayed last time, and the first half is represented new picture displayed.Here express from uppermost line begin to write write start line, be that writing line that aforesaid line-by-line writes roughly reaches near the state the central authorities of picture, in the writing of data on carrying out this line, for reset line, for example four line utilizations write resetting of data.Manipulating Figure 56 about this further specifies.
In Figure 56, at first set of the operation of four lines as reset line.In the figure, if import Eio signal and Lp signal simultaneously, then at first from the picture of Figure 55 above begin to select article one line, be in the state that can write data to this line.Then, if import second pulse of Eio and Lp signal simultaneously, then initial article one line of selecting is by Lp signal transformation, the second line is selected, and Shu Ru Eio signal is selected article one line again simultaneously simultaneously, thereby is in article one line and these two selecteed states of line of second line.Repeat this operation, be in selection mode from four lines of article one line to the between the reset line setting district, thereby be in the state that can write data to these four lines.
In between time-out line setting district secondarily, only import the Lp signal, utilize this pulse to carry out the conversion of a line, thereby be in five the selecteed states of line of second line to the from the picture.
Between write area secondarily at the beginning, import Eio signal and Lp signal simultaneously, at five lines of second line to the of selecting before this by the conversion of line-by-line ground, thereby be in from six selecteed states of line of the 3rd line to the, simultaneously, because the input of Eio signal, the initial line on the picture, be that article one line also becomes selecteed state.Under this state, by the data of article one line are provided, write the data that should write to article one line, simultaneously, the data that article one line is provided to six lines of the 3rd line to the are carried out resetting of data presented last time as the data that are used to reset.At this moment, the second line becomes the time-out line of setting in suspending between the line setting district, do not carry out writing of data.
Corresponding with the input of next Lp pulse, the line of Xuan Zeing is transformed before this, becomes the second line and from seven selecteed states of line of the 4th line to the.Under this state, the data of second line are provided, write the data that should write to the second line, simultaneously, carry out resetting from video data last time of seven lines of the 4th line to the.
The further input by next Lp pulse, the 3rd line and selected similarly from eight lines of the 5th line to the, the data of carrying out the 3rd line write.Article three, be written into the data of article one line during the input of the Lp pulse of line before two, but usually, the response time of cholesteric crystal is because the physical property of material is tens of ms levels.In the input time of Lp pulse as the timing of the data that write the second line, article three, line is in and suspends the interval, in this interval (for example below the 50ms), the pixel of second line is in focal conic state or the transition state in flat state shifts on the way, in the actual moment that the data of the 3rd line are provided, decision any as in the focal conic state of actual write state or the flat state.Repeat such operation then, up to carrying out the 240th line for example, being that the data of the nethermost line on the picture write.
Below, use Figure 57 illustrates the different consumption electric power suppressor mode among the embodiment 4.Figure 57 is the signal of reversal of poles of the drive waveforms of the liquid crystal cell that illustrates in Figure 54 of decision, but generally speaking, in cholesteric crystal, the data that are preferably in a line write the reversal of poles that makes pulse in the pulse.This is the problem for the deterioration of deterioration that solves liquid crystal or image quality (image retention or crosstalk etc.), make the method for reversal of poles with for example comprising every several lines or every frame, but can cause because the image retention that the change etc. of the ion in the liquid crystal causes or show disturbs, because of rather than very desirable mode.
The upside of Figure 57 is represented the reversal of poles mode of existing drive signal, use be by positive pulse being provided at first to each bar line, then providing negative pulse to carry out the mode of reversal of poles.The following side waveform of Figure 57 is the reversal of poles mode of embodiment 4, for example, apply positive pulse at first, then apply negative pulse to article one line, on the contrary, apply negative pulse at first, then apply positive pulse to the second line, carry out the reversal of poles of drive signal with such form, like this, though the polarity in line be inverted because returing cycle itself becomes twice, so can suppress to consume electric power, display quality does not have problems simultaneously.
Figure 58～Figure 60 is the key diagram of the effect of the type of drive that illustrates in Figure 55～Figure 57.Figure 58, Figure 59 represent and effect as the corresponding embodiment 4 of Fig. 3, Fig. 4 of DESCRIPTION OF THE PRIOR ART.By using aforesaid type of drive, even use the short pulse that for example has the 8ms left and right sides cycle, replace using the long pulse in cycle with tens of ms, also can not produce the reduction of contrast, write thereby driving circuit that can be by using the faint electric power about 5mW carries out high-quality data to the picture of QVGA size (horizontal 320 points * vertical 240 points).
Figure 60 is not carried out to reply position in embodiment 4, but several line ground, is that per four line ground reset and the key diagram of the consumption electric power inhibition effect that produces in Figure 56.Be carried out under the situation of reply position, the consumption electric power when driving beginning is very big, but in embodiment 4, can suppress the increase of such consumption electric power.
Below, use Figure 61, Figure 62 illustrate the jump type of drive as the image writing mode of embodiment 4.In this type of drive, promptly jump in the type of drive, do not provide general mode, and provide the signal of segmented model to the scan electrode side, write thereby can carry out data the pixel of the optional position on the matrix.
In Figure 61, at first, carry out the integral reset of display frame, in this resets, can make integral body side by side transfer to the focal conic state, but because it is big to consume electric power, so, utilize that short pulse with following cycle of 3ms carries out, also have the effect that resets to the simple resetting of incomplete focal conic state.Perhaps, also display part integral body can be divided into a plurality of, each piece is resetted.
Then, select to write identical patterns, be the part of complete white pattern here, the electrode of this part is write in batch in the scan electrode side.Like this, complete white pattern can be on many lines, described simultaneously, thereby the shortening of driving time can be realized.
Here, exemplify out complete white pattern as identical patterns, but identical patterns is not particularly limited, but it is big to resemble the consumption electric power of the pattern that spatial frequency is high the tartan, so, must the number of the line that writes in batch be limited to some extent according to pattern.That is, the pattern that spatial frequency is high more, the number of the line of Xuan Zeing is few more in batch.
In Flame Image Process, if utilize the image make the random pattern of handling at the error-diffusion method of the error pixel diffusion towards periphery of certain pixel, then exist the probability of identical patterns lower, but, shaking in a kind of systemic dithering of (デ イ ザ) method, perhaps in the half tone image that utilizes the site to form, there is identical patterns sometimes as 2 values that on the concentration signal of grey scale image, apply noise, passing threshold processing realization 2 values then.Therefore, resembling under the more situation of complete white part etc. the text display, this jump type of drive is effective especially.
In Figure 61, after the writing in batch of identical patterns, carry out common order line and drive (passive drive), thereby the order of carrying out the remainder beyond the identical patterns writes.At this moment, if staggered scanning then can identify integral image quickly.The feature that this jump drives is not use MLA to drive such complex way, but can realize with simple drive circuit, and make the number difference of the line that drives in batch according to the difference of pattern.
Figure 62 is the processing flow chart of this jump type of drive.In the figure, the left side is as the identical patterns detection procedure figure that drives pre-treatment.In this is handled, the 2 values screenings (ス Network リ one ニ Application グ) of for example using 8 original image in step S1, to utilize error-diffusion method etc. to carry out, in step S2, as circulation 1, selection is as the scan electrode of the reference source of data, in step S3, selection is as the scan electrode of the comparison object of data, in step S4, carry out pattern comparison at the data of each electrode, in step S5, judge whether to detect identical patterns, under detected situation, in step S6, will exist after the coordinate of identical patterns or address that the address is stored in identical patterns preserve in the storer 86, perhaps directly change the scan electrode of comparison object and continue to handle not having under the detected situation, in step S2, selecting by step S3, as a comparison the moment that relatively finishes of the data of the scan electrode in source, change the scan electrode and the continuation in source as a comparison by step S2 and handle, after the comparison of having carried out total data, end process.
The process flow diagram on the right side of Figure 62 is when driving, write the process flow diagram of processing.In the figure, after handling beginning, in step S10, for example carry out the reset processing in batch of display part integral body, in step S11, preserve identical patterns of taking-up the storer 86 from the address of identical patterns, in step S12, select to write a plurality of scan electrodes of this pattern simultaneously, in step S13, carry out writing in batch of data, next pattern is carried out processing from step S11 to S13.Identical patterns write end after, in step S14, carry out the circulation that writes at the line that does not write, in step S15,, finish display process then to having write passive the writing (パ Star シ Block Books き Write body) that remainder line-by-line ground beyond the identical patterns carries out data.
Below, use Figure 63, Figure 64 that the many-valued writing mode of embodiment 4 is described.Generally in the display device of using cholesteric crystal, if writing speed height, then insufficient to the transfer of focal conic state, so there is the low problem of integral image concentration, but in embodiment 4, thereby can utilize this point to carry out writing of medium tone and repeat to show and know that the many-valued of image writes.
At first, the situation that 3 values write is described, at first, utilizes 3 values, for example 0,128,255 these 3 level under the situation of 8 256 gray shade scales come original image is carried out Screening Treatment.This treatment types does not need special qualification, but by using aforesaid error-diffusion method or as blue noise mask (the Block Le one ノ イ ズ マ ス Network) method of the Flame Image Process under the large tracts of land more etc., can generating high-resolution pseudo-medium tone image.
After this 3 value Screening Treatment, extract the pixel of black (0) level, by only extracting the pixel extracted, promptly be written into the pixel of black originally, and only this pixel is scanned for the first time, the image that carries out medium tone writes.That is, by driving liquid crystal cell than generally high speed, the image that carries out the middle gray grade level under the state of having fixed from the output voltage of driver writes.By the adjustment of actuating speed, can shown in Figure 63, obtain having write the image of medium tone data to the pixel that should write black.
Afterwards, shown in Figure 64, carrying out scanning for the second time, promptly carrying out black (0) level and centre (128) level translation is that the data of black (0) level write, thereby in Figure 63, become the black gray grade for the pixel of middle gray grade, part in addition is written into the data of middle gray grade or white gray grade, finally forms 3 value images.Like this, can show the image of many-valued gray shade scale simply, simultaneously, the user also can obtain the general image that shows early.That is, initial fuzzy image is clear at leisure to be shown, and writes more frequently by suitably setting sweep velocity, and the above many-valued demonstration of 3 values also can realize.In addition, opposite with this method, also can use the method that begins to write cumulatively the pixel that will become the white gray grade from middle gray shade scale.
As mentioned above, according to embodiment 4, use cholesteric crystal etc. have semi-permanent storage display element, do not have in the display device of power supply, consumption electric power in the time of can suppressing to drive significantly, in addition, can not produce the high-quality demonstration that image retention or contrast reduce at short notice.
Figure 65 represents the configuration example of such automatic display unit.In the figure, automatic display unit 90 is compared with radio display 21 for example shown in Figure 7, except having control part 35, display part driving circuit 39 and storage property display part 40, also have power supply 91, the Internet connecting portion 92, battery 93, timer 94 and nonvolatile memory 95.
In Figure 65, automatic display unit 90 has carried host function and to the linkage function of the Internet, after the energized 91, use is stored in URL in the nonvolatile memory 95 and the operation by the Internet connector 92 obtains web data, according to the display style information that is stored in the nonvolatile memory 95, display web page data on storage property display part 40 automatically are in the dump state then.The content of nonvolatile memory 95 can freely rewrite from outside, for example wireless terminal pusher side.In addition, also can utilize the timer of supporting by battery 93 94 automatically to start automatic display unit 90.
And the display unit in the claim 25 is equivalent to the storage display part 40 of Figure 65, and storage unit is equivalent to nonvolatile memory 95, and control module is equivalent to control part 35 and display part driving circuit 39.In addition, non-volatile memory cells in the claim 30 also is equivalent to nonvolatile memory 95, can in this storer 95, store the video data of multipage, to rewrite the displaying contents of storage property display part 40, also can use the content of storer 95 to recover this content because any reason is stored under the situation that shown content is wiped free of on the property display part 40.
Figure 66 is the configuration example with the automatic display unit of communication terminals such as PC or PDA 97 wired connections.In the figure, automatic display unit 90 and communication terminal 97 have wireline interfaces 96,98 such as USB or contact-type IC-card simultaneously.After automatic display unit 90 and computing machine or slot (ス ロ Star ト イ Application) type or support (Network レ one De Le) type IC card reader/writer were connected, the beginning power supply was supplied with also and is started, with the same operation of Figure 65 after, automatically be in holding state.If cut off and being connected of computing machine etc., then power supply is cut off.The content of nonvolatile memory 95 can via wireline interface 98,96 from host computer side, be that communication terminal 97 sides freely rewrite.Also automatic display unit 90 can be continued to be connected with communication terminal 97 sides, and for example utilize timer 94 automatically to start.
Figure 67 is the configuration example with the automatic display unit of communication terminal wireless connections.Automatic display unit 90 and communication terminal 97 have and corresponding wave points 100,101 such as WLAN or bluetooth simultaneously, automatic display unit 90 starts accordingly with reception from the startup command of communication terminal 97, and carries out the operation same with Figure 65.Also can utilize by the startup command of not shown battery backed monitor persistent surveillance, utilize carry the startup command of when the not shown timer expiry of communication terminal 97 sides, being sent and automatically start from communication terminal 97 sides.
Figure 68 is the configuration example with automatic display unit of contactless ic card.Automatic display unit 90 has contactless ic card 102 or RF (radio frequency) ID interface, and communication terminal 97, for example IC card reader/writer also have contactless ic card 103.
If reach below the setting with the distance of communication terminal 97, automatic display unit 90 just starts automatically, carries out and the same operation of Figure 65.Contactless IC card comprise that communication distance is as short as about 10cm but communication speed fast grow to about 1m but the slow contiguous type of communication speed near type and communication distance.Also can carry this IC-card chip of two types on the automatic display unit 90.In this case, under the long distance state that only contiguous type can be worked, the electric power that obtains from communication terminal 97 sides diminishes, so, relatively reality is, blocks all sidedly to the electric power of display part and supplies with, because the restriction of communication speed transmitted image data and only transmit lteral data not.
Figure 69 is the example of information that is stored in the Show Styles of the information of preparation method of the data to be displayed in the nonvolatile memory 95 of Figure 65 for example and the video data that obtained.In the figure, in the 0-255 of address, store the preparation method of the pathname of URL or file as data to be displayed.This content be for example * * * * * URL of .com.Be data after the address 256 about Show Styles, pixel count, the lengthwise of storage display frame or the appointment of growing crosswise and etc. doubly, amplify or the appointment dwindled etc. and Show Styles data like the general printed pattern data class.
In embodiment 5, not only carry out data presentation, time update date that also can video data.Figure 70, Figure 71 are the key diagrams of update date time showing pattern.In Figure 70, in display device side, the update date time showing portion that uses segmented pixels is set mutually independently with the display part of data itself, also can use cholesteric crystal as this display part.
Figure 71 goes back the time on display update date in the display part of data, and this demonstration is to send and show with the form of writing afterwards in main frame (communication terminal) side direction video data.Relative therewith, in Figure 70, for example from host computer side send independently video data and update date temporal information.Can judge it is information when immediately owing to shown time update date, user.
Further specify the configuration example of the automatic display unit among the embodiment 5.At first, at the storage display part 40 of Figure 65 shown in waiting display part with semi-permanent storage such as cholesteric crystal preferably as previously mentioned, but also can be do not have such character, for example can keep the element of memory contents with such unit of a few hours or 1 day, perhaps also can make up the element and the nonvolatile memory that do not have storage property fully.
The one page or the multipage that also can have in this case, non-volatile buffer memory.Have at display element under the situation of semi-permanent storage, not necessarily need memory buffer, but by carrying the memory buffer of one page, owing to for example surpassing under the situation that storage property maintenance upper temperature limit disappears, also can recover displaying contents immediately at part or all of the displaying contents of display element.In addition, by carrying the memory buffer of multipage, immediately switching display content.
In addition, automatic display unit also can be forbidden the rewriting of the data that the storage display part 40 of Figure 65 for example is shown.This rewriting forbids that method can be the such hardware approach of writing prohibition mode in the floppy disk (floppy disk) for example, can certainly be software approach.
In addition, owing under any reason and the outside cut situation of communicating by letter, what can obtain in the video data end acquisition when beginning with outside communication once more does not obtain data to automatic display unit as yet the way of the operation that obtains video data from the outside.Such method for example is widely used in the download support facility of freeware etc.RESUME function in such support facility can be used for obtaining still NO data.
In addition, the automatic display unit among the embodiment 5 also can have the historical hold function relevant with the preparation method of video data.Such function not necessarily needs, but by having such function, can be easily with reference to the past data presented.Such history certainly is kept in the nonvolatile memory 95 of Figure 65, also can be kept at the outside via main frame.
The widespread use of the automatic display unit of embodiment 5 is described at last.Such example application is described at first simply, promptly can with movable termination picture former state be sent to automatic display unit, but also can make up the data with the corresponding high precision of movable termination picture, big picture in addition, be sent to automatic display unit then.
In addition, for the automatic display unit driver (De ラ イ バ) on the movable termination is installed from automatic display unit, automatic display unit also can have the installation procedure (イ Application ス ト one ラ) that movable termination is used.Usually, the movable termination memory space is little, thereby by installation of driver when needed, in unwanted moment deletion, can effectively utilize storer.
In addition, automatic display unit also can have the shape of the refill (リ Off イ Le) that is equivalent to the replaceable page or leaf in the combined type notepad (シ ス テ system hand Account), can video data on the two sides of this refill.In this case, can antenna be set on the two sides, have magnetic masking layer, compare the voltage that on two antennas, produces, rewrite the video data of the face that is provided with the high antenna of voltage earlier in the centre.
In addition, in automatic display unit, can only unload the display part that comprises display panel+driver LSI, the function that also can have the data of wiping display panel and buffering storer in addition, also the part of display frame can be made as fixing advertisement viewing area, when video data upgrades, also show thereon with the regulated procedure downloading advertising data.
Use accompanying drawing to further specify such example application.The automatic display unit of Figure 72 (wireless demonstration thin plate and wireless display card) is equipped with non-contact IC card interface (antenna, IC chip).Make automatic display unit when being equipped with the portable phone of IC card reader/writer or digital camera, PDA, automatic display unit requires to transmit picture data.In portable phone etc., the automatic display unit driver is installed in advance, with portable picture data former state ground or made up with the big picture data of the corresponding high precision of portable picture data after, send automatic display unit to.Automatic display unit carries out and the corresponding display driver control of the electric power that provides from portable phone as aforementioned, and display picture data on display panel automatically is in holding state then.
Only by with laminal device near portable phone, just can amplify displayed map, perhaps show long mail integral body, perhaps the content of storing is wanted in demonstration, thereby makes things convenient in the extreme.The automatic display unit driver of portable phone also can be installed from automatic display unit.
When being equipped with the notebook computer of IC card reader/writer, automatic display unit requires to transmit printed data with the automatic display unit of Figure 72.The automatic display unit driver is installed in the notebook computer in advance, sends printed data to automatic display unit by common print routine.Automatic display unit carries out and the corresponding display driver control of the electric power that is provided by notebook computer, shows printed data on display panel, automatically is in holding state then.
Also automatic display unit can be designed to the shape of the refill of combined type notepad.In this case, also can show the two sides.By antenna is arranged on the two sides, in the centre magnetic masking layer is set, can discern IC card reader/writer and be in which display surface side.The video data of best priority processing IC card reader/writer place one side.
Figure 73 is equipped with USB interface as PC with the automatic display unit of second display.With after desktop computer is connected, automatic display unit requires to transmit picture data as second later display with automatic display unit.The automatic display unit driver is installed in the desktop computer in advance, similarly transmits picture data to automatic display unit with common display.Automatic display unit is display picture data on display panel, automatically requires to transmit next picture data, repeats this a series of operation then.
As everyone knows, use many displays can improve operating efficiency.That automatic display unit is compared with common display is thinner, lighter, the side of occupation of land not, can freely arrange and use, and also more cheap than common display, so can use 4～5 simultaneously.Nested in order to read comfily (ネ ス テ イ Application グ) darker online handbook, this can be described as essential one.
Then, the automatic display unit of present embodiment is equipped with WLAN interface and battery.After possessory desktop computer startup and possessory authentication finished, automatic display unit just automatically started.Require desktop computer to transmit personnel's calendar.The automatic display unit driver is installed in the desktop computer in advance, transmits personnel's calendar.Automatic display unit shows personnel's schedule on display panel, automatically be in holding state then.Under holding state, can only unload the display part of automatic display unit.
The people who prints personnel's schedule every day is a lot, the paper that everyone will consume about 250 in 1 year.By using automatic display unit, saved the time of printing personnel's schedule every day, simultaneously, can cut down the consumption and the paper refuse production of paper.
Automatic display unit in the present embodiment is equipped with non-contact IC card interface (antenna, IC chip).Make automatic display unit near after being equipped with the portable phone of IC card reader/writer, automatic display unit requires to transmit newspaper message.The automatic display unit driver is installed in the portable phone in advance, downloads newspaper message, send automatic display unit to from the homepage of newspaper office.Automatic display unit carries out and the corresponding display driver control of the electric power that is provided by portable phone, shows newspaper message on display panel, automatically is in holding state then.
By with laminal device near portable phone, just can read up-to-date newspaper message, thereby very convenient.Identical therewith technology also can be applied to e-book.Owing to do not need to download in advance, so can utilize the suspension ring advertisement etc. of electric car for example to begin to read noticeable paperbound or magazine then and there.Compare with the e-book that downloads to the mode in SD (secure digital formula, the セ キ ユ ア デ イ ジ タ Le) card that is used for copyright protection etc. etc. in advance, convenient and comfortable in the extreme.
Automatic display unit in the present embodiment is equipped with WLAN interface and battery.After possessory desktop computer started, automatic display unit automatically started.Require to transmit newspaper message to desktop computer.The automatic display unit driver is installed in the desktop computer in advance, downloads newspaper message, send automatic display unit to from the homepage of newspaper office.Automatic display unit according to display panel (A6～A3 size open the back about two pages of relative (See Open I)) size show newspaper message, automatically be in holding state then.Under holding state, can only unload the display part of automatic display unit.
By using automatic display unit, do not need to print the delivery of dispensing to each family, so subscription charge is more cheap than existing newspaper, and can read than existing newspaper new information more timely.Can cut down the consumption figure and the paper refuse production of paper.
Automatic display unit shown in Figure 74 is pasted with a plurality of in the electric car vehicle, is equipped with blue tooth interface and battery respectively.According to from the enabled instruction that is brought into notebook computer in the car, that be equipped with bluetooth, one in the middle of the automatic display unit is utilized IC to discern this instruction and startup, requires to transmit ad data.The automatic display unit driver is installed in the notebook computer in advance, transmits ad data to be shown to the automatic display unit that starts.Automatic display unit is display ads on display panel, automatically is in holding state then.Repeat a series of operation, up to the displaying contents renewal end of whole automatic display units.
By using automatic display unit, can cut down consumption, the paper refuse production of printing cost, attaching cost and paper.Also computing machine can be set up in car,, be switched ad content all sidedly according to the region of travelling of time period electric car.Also identical therewith technology can be applied to the price display in shops such as supermarket.
Then, the automatic display unit that is used for the wall advertisement of buildings is pasted with a plurality of on the wall of buildings, is equipped with blue tooth interface and battery respectively.The computer installation that is equipped with bluetooth is connected with a plurality of locational antenna that is arranged on wall in buildings.According to enabled instruction from computing machine, start in the automatic display unit, require to transmit ad data.The automatic display unit driver is installed in the notebook computer in advance, transmits ad data to be shown to the automatic display unit that starts.Automatic display unit is display ads on display panel, automatically is in holding state then.Repeat a series of operation, up to the displaying contents renewal end of whole automatic display units.Utilizing many automatic display units to show under the situation of big picture,, handling so carry out the stripping and slicing (cut り and go out) of image easily because each only requires to bear separately the view data of part.
By using automatic display unit, can cut down printing cost, attach cost.Can change ad content all sidedly according to the time period.Also identical therewith technology can be applied to the timetable at station.
In meeting room, be provided with a plurality ofly as the automatic display unit of the distribution of the meeting shown in Figure 75 data, be equipped with blue tooth interface and battery respectively.According to from the enabled instruction that is brought into notebook computer in the meeting room, that be equipped with bluetooth, start in the automatic display unit, require to transmit meeting material.The automatic display unit driver is installed in the notebook computer in advance, transmits meeting material to be shown to the automatic display unit that starts.Automatic display unit is the display conference data on display panel, automatically is in holding state then.Repeat a series of operation, up to the demonstration end of whole automatic display units.
By using automatic display unit, can cut down printing cost, make consumption, the paper refuse production of this cost and paper.Suddenly the data that needs in meeting also can be distributed apace.In addition,, can when meeting adjourned, delete the data of display panel and buffering storer for confidential data, so, by using automatic display unit, can improve confidentiality.
The following describes the use example of removable demonstration with advertisement Presentation Function.Amplifying with the picture of movable equipment and to show that (Figure 72) is identical, is the advertisement viewing area of fixing but difference is the part of display frame.When video data upgraded, the URL downloading advertising data from regulation showed in the advertisement viewing area.This is effectively as the sales promotion instrument, so the very possible a large amount of distributed for free automatic display units of enterprise.
As mentioned above, according to embodiment 5, can realize the automatic display unit of Electronic Paper easy to use, this Electronic Paper height has merged following two features: start automatic display unit under the situation of inoperation computing machine etc., make contactless IC card near the IC card reader/writer that is built among computing machine for example or the PDA, thereby can show up-to-date information, even and cut off the electricity supply, the feature that does not also disappear shown; And, can at random rewrite the feature of displaying contents.
Utilizability on the industry
The present invention certainly can be applicable to IC-card or Electronic Paper, liquid crystal display cells and comprises portable terminal device or the manufacturing industry of the movable equipment of digital camera, and can be applicable to use in whole industries of these display unit, display element and movable equipment.
Claims (2)
1. display element drive method is characterized in that having following steps:
View data with liquid crystal cell of cholesteric crystal to be written is transformed to the step of the view data of 3 gray shade scales;
After above-mentioned conversion, extract the minimum pixel of brightness, and write the step of the minimum pixel of this brightness;
Pixel that brightness is minimum and brightness the 2nd low pixel are transformed to the pixel of black-level, and write the step that this is transformed to the pixel of black-level; And
Write the step of the highest pixel of brightness,
Wherein, in the above-mentioned step that writes, described cholesteric crystal is write to the speed of the writing speed of focal conic state transitions to be higher than.
2. display element drive method is characterized in that having following steps:
View data with liquid crystal cell of cholesteric crystal to be written is transformed to the step of the view data of 3 gray shade scales;
After above-mentioned conversion, extract the highest pixel of brightness, and write the step of the highest pixel of this brightness;
Pixel that brightness is the highest and brightness the 2nd high pixel are transformed to the pixel of white level, and write the step that this is transformed to the pixel of white level; And
Write the step of the minimum pixel of brightness,
Wherein, in the above-mentioned step that writes, described cholesteric crystal is write to the speed of the writing speed of focal conic state transitions to be higher than.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101354801A CN101533633B (en) | 2003-09-04 | 2003-09-04 | Display element drive method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101354801A CN101533633B (en) | 2003-09-04 | 2003-09-04 | Display element drive method |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038268302A Division CN100492479C (en) | 2003-09-04 | 2003-09-04 | Information display system and display element driving method |
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| CN101533633A CN101533633A (en) | 2009-09-16 |
| CN101533633B true CN101533633B (en) | 2011-05-18 |
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| JP5884344B2 (en) * | 2011-09-01 | 2016-03-15 | セイコーエプソン株式会社 | Circuit device, electronic device and IC card |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123440A (en) * | 1994-07-08 | 1996-05-29 | 株式会社日立制作所 | Low power driving method for reducing non-display area of TFT-LCD |
| CN1161465A (en) * | 1996-03-22 | 1997-10-08 | 英业达股份有限公司 | Method and device for displaying multi-stage grey scale for single color lattice LCD displaying screen |
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2003
- 2003-09-04 CN CN2009101354801A patent/CN101533633B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123440A (en) * | 1994-07-08 | 1996-05-29 | 株式会社日立制作所 | Low power driving method for reducing non-display area of TFT-LCD |
| CN1161465A (en) * | 1996-03-22 | 1997-10-08 | 英业达股份有限公司 | Method and device for displaying multi-stage grey scale for single color lattice LCD displaying screen |
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