---
The timing sequence of LCD scan during which all pixels are addressed , pixel transmittancechanges to form the next image component, and light source turn on and turn off when a small numberof lamps is used for full resolution 3-D imaging as in FIG. 2 is shown in FIG.s 3a - 3c.
The timing diagram is shown in FIG.s 3a - 3c. FIG. 3a depicts the repeated address of LCD rowsstarting at the top row and proceeding to the bottom row. FIG. 3b shows the change from "off" oropaque state to "on" or clear state or vice versa of the first and the last pixels in a video field, afterthese pixels have been addressed, and the flashing of the first light emitting point or lamp 42 shown inFIG. 2. In the case of TFT and Ferroelectric LCDs, when a pixel is turned on during the scan of anLCD, it stays on until turned off, in this case until the scan of the entire LCD to display one videoframe is completed, and the last pixels have had time to change their state.
As shown in FIG. 3a the time period between the start of one LCD scan and the start of the next isdivided into three periods during which three actions occur: a first period 22 during which the LCD isscanned and its rows sequentially addressed usually starting at the top row 20 and ending at the bottomrow 21 causing the pixels to change state in order to display the next image, a pause or waiting period
23 during which nothing happens, and an optional blanking period 24 of beneficial effect in someLCDs in which the LCD is scanned again and all the pixels are addressed and made to change state toeither full on or full off depending on LCD configuration, to completely erase the previous image.Typically, all the pixels of a given row are addressed at the same time.
The signal to change the states of the first row pixels is given to the LCD 6 at time tg. For illustrativepurposes, it is assumed that a delay of about 3.5 ms occurs before the pixel completes its change to anew state in response to the applied signal - it begins to turn on at time t and completes the change inits state between opaque and clear at time t2 as shown in FIG. 3b. Although in FIG. 3b pixels areshown turning between full off and full on it is understood that typically some will be turning from onto off and others will turning between one intermediate gray state and another. The last pixel starts itsstate change at time t3 after it is addressed at time t and completes it at time t4. At this instant thevideo frame is complete and the light source 7 flashes, as shown in FIG. 3c, thus transferring theinformation in the first field to the observer. As seen in FIG. 3a a pause period 23 during which noaddressing of the LCD happens is inserted in order to give all the pixels time to change to their newstate before the lamp is fired. If the time it takes a pixel to change state is long enough, or the timerequired for a scan is short enough, a second scan can occur during the pause period. During thesecond scan the same image information is transferred to the LCD as in the first scan. The optionalblanking scan can then occur followed by the next address of the LCD during which the pixels areaddressed in order to create the second image field. The sequence in the second frame is the same as inthe first frame except that lamp 43 flashes. Likewise, the timing of events is identical in subsequentframes, the only difference being the information written to the LCD and which of the lamps flashes.Again as shown in FIG.s 3a - 3c, the pixels take a certain period of time to change state once they areaddressed. In this case 3.5 ms is shown for illustration, that being the period typical of a custom pixelLCD being made by an LCD development lab for Dimension Technologies Inc. The time required toturn off from full on may be different than the time required for full on to full off, or the time requiredto change between various intermediate gray levels. In such cases, the longest time period required tochange between two states is most relevant, and must be accommodated so that all pixels, regardless ofwhich states the change to or from, can complete their change before a lamp is fired.
Lamps, of course, never flash instantaneously, but rather emit light for a short time and then turn off.The duration that the lamp is emitting light depends on the lamp, and can be controlled with somelamps, such as LEDs. In general, the lamp should emit light only during the time period between thecompletion of the last pixel*s change and the beginning of the next address scan. However, if ablanking scan is used, and the LCD is blanked to a dark state, the lamps may emit light during theblanking period without significant image degradation. However, if the LCD is blanked to the bright ortransparent state, the lamps should stop emitting light before the blanking period begins. Otherwise,contrast will be lessened considerably.
A total of 16.7 ms has elapsed from the time the turn on signal has been applied to the first pixel tothe completion of the change in state of the last pixel and flash of the light source, and blanking at allthe pixels, and beginning of the next scan. Thus, there are 60 fields per second or 30 images videoframes per second. This frame frequency will result in a nearly flickerless image in this particularconfiguration given typical screen sizes and brightness levels. Other configurations in which more thantwo sets of light lines or spots are created may require higher frame frequencies to avoid flicker. Thisscanning, changing, and flash sequence proceeds continuously, as subsequent image frames, eachconsisting of two sequential fields made visible to the observer by means of two lamp flashes, aredisplayed. The two image fields each consist of interleaved right and left eye members of a stereopairimage as described in US-A-5,036,385. 29 35 32 27
1 2
2 3
DimensionTechnologiesInc.
38 40 22
Turning now to the system embodiment of Figure 2, then following the writing of data for oneTV field into the display panel 10 in a display information address period comprising one half the TVsignal field period as previously described, the picture elements of the array are addressed again in theinterval comprising the remaining half of the TV signal field period to drive them to their substantiallynon-transmissive, black, state, unlike the scheme described in EP-A-0487140 in which the pictureelements are addressed again with the same display information in the second half of the TV fieldperiod. To achieve this, selection signals are again supplied by the row driver circuit 20 to each of therow conductors in turn during this interval corresponding to the latter half of the TV field period withthe selection signal of the first row conductor coinciding substantially with the beginning of theinterval. For the duration of this period a predetermined reference voltage, VB, is applied to each of thecolumn conductors 1 6, which is selected such that the picture elements are driven to their substantiallynon-transmissive state. The reference voltage is applied by means of a switch circuit 35 connectedbetween the outputs of the column driver current 22 and the set of column conductors which switchesthe column conductors between the column driver circuit's outputs and the reference voltage under thecontrol of a switching signal S supplied by the circuit 21. The row conductors are scanned with aselection signal at the same rate as previously so that the rows of picture elements are set to theirsubstantially non-transmissive states in sequence with the final rows being set close to the end of theinterval. In one TV field period, therefore, there are two display panel address periods namely a displayinformation address period in which the picture elements are driven to the required display states and asucceeding interval in which they are driven to their substantially non-transmissive states.At the end of the TV field period, the change-over switches 28 and 32 are operated, and the switchcircuit 35 reset, so that the data signals for the next TV field are read out to the circuit 24 from theother store, again at twice the field rate of the TV signal and in synchronism with scanning of the rowconductors at twice the conventional rate and while the subsequent TV field is being loaded into thefirst store. After this next field has been loaded into the display panel, the picture elements are againdriven to their substantially non-transmissive display states as before in the remaining latter half of theTV field period. This manner of operation is repeated for successive TV fields.
Thus, the operation of the display panel occupies a succession of approximately equal periods of time,each corresponding to approximately one half of the TV signal field period, e.g. 10ms, in whichalternate periods constitute first display panel field periods during which the picture elements areloaded with display information for a respective TV field and in which the intervening intervalsconstitute second display panel field periods during which the picture elements of the array are drivento their black state. This is depicted diagrammatically in Figure 4 in which T represents time and F Ato F D denote four successive field periods of the applied TV signal, VS. The relative timings ofthe operating periods of the display panel, DP, are illustrated in which f A to f C represent the firstdisplay panel field display information address periods, and the periods f represent the intervalstherebetween constituting the second display panel address periods. 18 11 20
18 19 13
0017 0031
the problem of unwanted visual effect
when displaying moving images
20 21 to alleviate
thereby resulting in the improvement to the perceived resolution of moving images
11 12
0010 0011
the lamps may
emit light during the blanking period
0004 000
0006 0007
- - -
0009 0012
2 1
look around
In the case of TFT and Ferroelectric LCDs
LCDs
In the case of TFT and Ferroelectric LCDs
In the case of TFT LCD and Ferroelectric LCD
the lanps may emit light during the
blanking period without significant image degradation.
may
2 1
flip
出典：裁判所ウェブサイト「裁判例検索」（https://www.courts.go.jp/hanrei/36599/detail7/index.html）。本文は同サイト掲載の判決書PDFからTaiLexi AIがテキスト化・整形したもの（正確な文言は原本PDFを参照）。判示事項・裁判要旨・参照法条は裁判所の公表どおり。