WO2000067248A1 - Afficheur - Google Patents

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Publication number
WO2000067248A1
WO2000067248A1 PCT/JP2000/002868 JP0002868W WO0067248A1 WO 2000067248 A1 WO2000067248 A1 WO 2000067248A1 JP 0002868 W JP0002868 W JP 0002868W WO 0067248 A1 WO0067248 A1 WO 0067248A1
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WO
WIPO (PCT)
Prior art keywords
display
display device
image
liquid crystal
moving image
Prior art date
Application number
PCT/JP2000/002868
Other languages
English (en)
Japanese (ja)
Inventor
Tsuyoshi Uemura
Kenji Nakao
Seiji Nishiyama
Mika Nakamura
Katsuji Hattori
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to KR1020007014617A priority Critical patent/KR20010053114A/ko
Publication of WO2000067248A1 publication Critical patent/WO2000067248A1/fr

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3651—Control of matrices with row and column drivers using an active matrix using multistable liquid crystals, e.g. ferroelectric liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0261—Improving the quality of display appearance in the context of movement of objects on the screen or movement of the observer relative to the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals

Definitions

  • the present invention relates to a hold-type liquid crystal display device, and more particularly to a hold-type liquid crystal display device for displaying a moving image or displaying a moving image and a still image separately, for example, a liquid crystal display device.
  • a hold-type liquid crystal display device for displaying a moving image or displaying a moving image and a still image separately, for example, a liquid crystal display device.
  • liquid crystal display devices using conventional active matrix type TN liquid crystal display have a slow response, but in recent years the development of liquid crystal materials such as the development of OBC type liquid crystal has been said. With the progress, the display response time has been dramatically improved.
  • CRT cathode ray tube, so-called brown tube
  • each pixel has one field period (the time required to display one screen, the time required for normal television broadcasting, etc.). A strong light is emitted for display only for a small part of the time (currently 1/60 second).
  • FIG. 1 (b) in the liquid crystal display device, the light used for the display is held (held) for almost one field period.
  • the solid line is the change in luminous intensity in an ideal case, and the broken line is the change in actual luminous intensity.
  • the brightness of the CRT shown in (a) is much higher than that of the liquid crystal shown in (b). high .
  • the response time which is the time until darkness
  • the response time is as fast as 0 ms as shown by the solid line
  • the responsiveness of the screen is delayed (this is also described in the above-mentioned reference 1).
  • the integration effect of the human eye is a physiological (psychological) effect in which a moving image composed of several pixels or an image is recognized on average. This is a kind of afterimage effect. The cause of this will be described very simply with reference to FIG.
  • (1) of FIG. 2 it is assumed that the black circle 61 displayed on the upper left of the display surface 91 1 has moved to the position of the black circle 62 on the lower right in the following cases.
  • a black circle 61 is displayed in the upper left corner of only a part of one field period indicated by the up and down arrows. Other periods are not displayed as black circles as shown to the right.
  • a black circle 62 is displayed at the lower right position in a very small part of the next field period.
  • the human eye recognizes that the black circle is moving to the lower right due to the flow before and after the video (not shown). Moving down also looks smooth.
  • the black circle 61 is continuously displayed at the upper left of the screen throughout one field period, so that the next one field is displayed. Even if a black dot 62 is displayed in the lower right during the C period, it is difficult to recognize the movement of the black dot. In other words, although it is recognized that the black circle is moving to the lower right due to the flow of the video not shown in the head, it is actually displayed as stationary for a certain period of time. Continuing to do so creates confusion in the mind. As a result, a poke of the video, a delay in responsiveness of the movement, and the like occur.
  • a liquid crystal shutter may be placed somewhere on the display device. It is only necessary to set the opening time in synchronization with the vertical synchronization for display. Also, as another means, as described in Reference 2, the flashlight can be synchronized so that the light is synchronized and blinked in a nose-like manner. You may let the rash.
  • the time-division gradation display method is a method in which one field is It is divided into fields, and gradation is displayed by the difference in the total amount of time that this subfield is on.
  • the length ratio is 1: 2: 4: 8: 16: 32: 64: 128.
  • the on / off of each subfield depends on each bit data when the gradation data is displayed in 8-bit digital. Go.
  • a display device using a liquid crystal there is another projection type display. It consists of a light source unit that outputs a substantially parallel light beam, a display element that controls the amount of light beam transmitted according to the image to be displayed, and a lens unit that projects the light beam. It is standing.
  • a display element a liquid crystal display element is generally used, but a DLP element that changes the angle of a minute mirror may be used in some cases. At the same time, a similar problem arises with this projection display.
  • the display of moving images using these conventional moving image-capable technologies has many issues to be solved, but it is not the case when displaying moving images or images. It is very effective and provides a smooth display.On the other hand, when a liquid crystal display device for this purpose is used for displaying still images, for example, ⁇ A screen If the image is displayed or a still image is displayed, the display will be easier on the CRT than the conventional liquid crystal display device has, such as eyestrain caused by jitter. That point has been lost.
  • the present invention has been made with the object of solving the above problems, and is intended to provide a display device, particularly a hold-type display device, and more particularly, a display device using a liquid crystal.
  • a display device particularly a hold-type display device, and more particularly, a display device using a liquid crystal.
  • the above-mentioned poke and the characteristics of the image in which the response delay is liable to occur are found, and a solution is then made.
  • a (hold-type) display device that displays moving images and still images, when displaying moving images, it is necessary to use driving and lighting compatible with moving images, and to display still images. Switches to driving and lighting for still images.
  • a moving image is displayed on a display device using a liquid crystal or the like, in particular, on a display surface using a hold-type display element.
  • a switching means for judging whether the image displayed in the step is a moving image (video) or a still image, and appropriately switching the two means by a predetermined method. ing . As a result, the following operation is performed.
  • the moving image driving means causes the display means to perform a moving image-based (suitable for a moving image) display (still for convenience of a scene). Image may be displayed).
  • the still image driving means similarly displays still images.
  • the switching means switches between the two means according to an image to be displayed by a predetermined method such as based on a data program recorded at the time of manufacturing.
  • the hold type display means uses a liquid crystal regardless of whether it is a transmissive type or a reflective type.
  • the video driving unit drives the liquid crystal corresponding to the video, or performs the video driving unit or the illumination corresponding to the video. It has a movie lighting drive unit. Of course, you may have both. As a result, the following operation is performed.
  • the video LCD drive unit of the video driving means When receiving a video signal such as a normal television broadcast (or when receiving an instruction to display the video signal, etc.), the video LCD drive unit of the video driving means is used to Driving LCD for video. Similarly, the lighting driver for moving images performs lighting corresponding to moving images.
  • the moving image liquid crystal driving unit displays an image by increasing a field frequency such as 1/60 second by a predetermined factor, such as twice, as compared with a still image display. It is characterized by being a high field frequency display drive unit. As a result, the following operations are performed.
  • the moving image LCD drive unit is a high field frequency display drive unit, and therefore displays images with a higher field frequency than that for still image display. For this reason, an intermediate image may be created as needed, and the latter half of a field may be displayed in black or gray to the extent that the afterimage effect is not adversely affected.
  • the moving image liquid crystal drive unit is an intermittent drive display drive unit that displays a screen by intermittent drive.
  • the moving image LCD drive unit has an even-numbered image in the left half, an odd-numbered image in the right half, and more appropriately.
  • the moving image is displayed by intermittent driving such as swapping the left and right. Of course, it will also emit knock light as needed.
  • the moving image lighting drive unit has a short-term lighting unit for lighting a display light such as a light-emitting diode and an electric light shorter than a period corresponding to the field frequency. are doing .
  • the moving image lighting drive unit is shorter than the period corresponding to the field frequency such as 1/60 second, for example, the first 1/90 second equal display light. Lights up.
  • the display is only for the first 1/120 second or the like, but may be the last 1/9 second or 1/120 second.
  • the moving image lighting drive unit displays the moving image at the time of displaying the moving image.
  • the pulse lighting section of the moving image lighting drive section is composed of a large number of images as long as the image does not adversely affect the afterimage effect when displaying the moving image.
  • Pulse light as a backlight for each screen of each image is turned off, for example, the last 1/120 second of one field frequency is turned off. Lights according to the prescribed procedure.
  • the switching means when displaying an image, such as when receiving a video signal, is an automatic switching means that detects this and automatically switches to the moving image driving means. is there .
  • the switching means is an automatic switching means integrated with a memory, a CPU, a computer, and the like. When a video signal is received, this is detected by a predetermined program. Then, it automatically switches to the moving image driving means. For this reason, appropriate instructions shall be given to each part such as the display means,, 'and the like.
  • the automatic switching means precedes the display of a screen that moves faster than at least a difference from the previous screen (including a partial image of a specific position or property). Detect and perform video-adaptive drive Difference detection type automatic switching hand It is a step. As a result, the following operation is performed.
  • the automatic switching means is a difference detection type automatic switching means, and switches between commercial broadcasting and scene depending on at least the difference from the previous screen and other cases. In addition, it detects moving images, etc., and performs driving corresponding to moving images so that it can be detected and viewed easily before displaying a fast-moving screen. Therefore, although there are exceptions such as the display of a time signal, the actual display is generally delayed by at least one field. In another invention, when displaying a still image, the still image driving means emits the display light more than during the period corresponding to the field frequency. It has a normal lighting part that keeps on lighting.
  • the still image driving means can display the still image (for example, in the case of a moving image whose movement is slower depending on the case) so that it is easy to see when displaying the still image.
  • the display light is turned on during the period corresponding to the ground frequency.
  • the element such as a liquid crystal display device has a response time of at least one field (in principle) so that it can sufficiently follow the fast movement of the moving image. 1/60 seconds, and 1/120 seconds depending on the case).
  • the response time is as short as 10 ms and at least shorter than the period of one field.
  • a judging means for judging whether the image data to be displayed is a moving image or a still image, and, if the judging means judges that the moving image is a moving image, a part of the display surface, particularly the moving Separate the part including the central part from the surrounding part, and display appropriate video-based display such as display of video-based display and display of video-based display in high mode. Since it has a moving image driving means in the center, the following operation is performed.
  • the judging means judges whether the image data to be displayed is a moving image or a still image. If the judging means judges that the moving image is a moving image, the center moving image driving means separates a portion including the center portion of the display surface from its peripheral portion and performs appropriate moving image display. . Therefore, at the periphery of the display surface, moving images mainly composed of still images and moving images in normal mode instead of in high or low mode are displayed. Indication of the subject is made. Note that even if the video has little movement or motion vector, it is of course possible to have a function to display still images. .
  • a voltage adjustment method and a time-division gray scale display method are used in combination in a general gradation display method of a display device without being limited to the hold type.
  • the period of a video signal input to the display device is one field, the one field is divided into a plurality of subfields, and "a plurality of subfields are divided into a plurality of subfields.
  • the number of subfields is set to 2 (in principle, at regular intervals) in terms of simplicity, cost, and effect.
  • it may have a function to set the interval to be irregular according to the content of the broadcast such as the CM program.
  • the number of subfields is, for example, 2 and the gradation is 50% or less, one field is used. The second half is no longer displayed. This aims to solve the response delay and the integration effect.
  • the subfield of 1 is 0N (normal ON for a normal liquid crystal display, 100% luminance), and OFF (0%) gradation. It is a display, and the other subfields adjust the time of 0 N (100%) according to the gradation to be assigned.
  • the response time of each pixel element of the display device is set to 16 ms or less.
  • a 0CB mode liquid crystal is used as a high-speed response means.
  • optical or mechanical shutters are used as a means of solving the response delay by the integration effect. The last period of one field is not displayed.
  • the update of each displayed image of a moving image and a video is synchronized with the interruption of light by the shutter. Specifically, on the display surface of a liquid crystal display, etc. (at this time, not from the left, right, or bottom), updating is performed in order from the upper pixel row. It synchronizes with the passage of the tar (a certain level is at the opening of the shutter). For this reason, for example, immediately after updating, only the first half of one field passes light from the start of a new pixel.
  • the shutter has an aperture (aperture) in which the transmitted light has half the height of the display surface (even if the light is diffused, parallel, etc.). ).
  • the shutter is formed by a liquid crystal capable of high-speed response such as a ferroelectric mode, an OCB mode, and a scattering mode.
  • a light beam scanning means specifically, for example, a rotating mirror is used instead of the shutter.
  • a small rotating prismatic mirror a so-called micromirror device, which electrically moves the angle of a mirror on a semiconductor is used as a rotating mirror.
  • the shutter is as small as the liquid crystal display (including the projection type film part).
  • a liquid crystal of a mode capable of a high-speed response of 30 ms or less or the like, specifically, a CB mode or the like is used for the display unit.
  • a hold-type display device when displaying a moving image or a video in which an image of about 1/30 to 1/60 is updated in order every second, particularly, To improve the dynamic response, an intermediate image is created from the original (raw) image data and inserted between the original images.
  • the original image is a whistle that is displayed for 1/60 second each, but is displayed for 1/120 second, and the original image is displayed between the previous and next raw images.
  • the created intermediate image is displayed for 1/120 seconds. Therefore, the overall display time is unchanged.
  • the creation of the intermediate image is based on the two raw image data before and after to be inserted, and the two raw images before and after, as well as the two raw images. I'm using overnight. Furthermore, in terms of fast and timely accurate response, an intermediate image may be created by extrapolating the previous two images (without using the latter image).
  • each pixel is originally in a predetermined state within one field, for example, for clear display of a moving image on a hold-type display device. The principle is to keep the darkness etc. (or in the past it was like that), but this is displayed at the end of each field I try to lose my state. As a result, the following structure is obtained, and the operation is performed.
  • each pixel is arranged in rows and columns, in rows and columns, and in a plane or multilayer (for example, G, H, cell).
  • the display element exhibits a display function in charge of transmitting and blocking light by applying an electric field.
  • the electric field applying means applies an electric field for display, the electric field is conventionally (although in practice there will be a slight decrease, but in practice) one field. Field was held constant within the time interval.
  • the discharging means eliminates this electric field by the small discharge. For this reason, at least in each field, at the end of one field, the electric field is 0, and in some cases, a small value that does not cause the integration effect. It is getting less.
  • the display means is formed on an active matrix substrate provided with a TFT or the like for driving an element.
  • the display element is a liquid crystal display device using a liquid crystal, an EL display device, a liquid crystal plasma display, or the like.
  • the liquid crystal layer has a certain degree of conductivity or resistance, so that an electric field applied to the electrodes above and below the liquid crystal layer flows through the liquid crystal layer itself. It disappears within one field interval due to the current flowing.
  • the electric conductivity of the liquid crystal is 10 to 10 Gemens or more.
  • an electric field applied to one of the upper and lower electrodes of the liquid crystal layer, or the horizontal electrode applies an electric field to a substrate or an earth-like line formed on the substrate. It is annihilated by flowing water.
  • liquid crystal on the display surface is a normally white, normally black, or misaligned.
  • the polarity in applying an electric field is alternately changed every screen or every horizontal pixel column.
  • the DC component at certain time intervals becomes zero, and charge-up is avoided.
  • the display is softer.
  • FIG. 1 is a diagram showing how luminance changes when displaying CRT and LCD.
  • FIG. 2 is a diagram for explaining the cause of the response delay of the movement in the hold type display.
  • FIG. 3 shows the configuration of the main part of the first embodiment of the present invention.
  • FIG. 4 is a diagram showing a state of an intermediate image used for display according to the second embodiment of the present invention.
  • FIG. 5 is a diagram showing the flow of data on the screen to be displayed in the above embodiment, and the relationship between the arrival time and the display time.
  • FIG. 6 is a configuration diagram of a main part of the liquid crystal display device according to the above embodiment.
  • FIG. 7 is a configuration diagram of a main part of a liquid crystal display device according to a third embodiment of the present invention.
  • FIG. 8 shows the contents of images that are displayed intermittently in order in the above embodiment. It is a figure.
  • FIG. 9 is a configuration diagram of a main part of a liquid crystal display device according to a fourth embodiment of the present invention.
  • FIG. 10 is a configuration diagram of a main part of a liquid crystal display device according to a fifth embodiment of the present invention.
  • FIG. 11 is a configuration diagram of a main part of a liquid crystal display device according to a sixth embodiment of the present invention.
  • FIG. 12 is a diagram conceptually showing a display method according to the seventh embodiment of the present invention.
  • FIG. 13 is a diagram conceptually showing the inter-grayscale response in the above embodiment.
  • FIG. 14 is a diagram conceptually showing a projection type liquid crystal display device according to an embodiment of the present invention.
  • FIG. 15 is a diagram conceptually showing the configuration and operation of the shutter of the display device of the above embodiment.
  • FIG. 16 is a diagram showing a positional relationship between the start of shining of the horizontal scanning line of the display unit and the opening tip of the chopper in the above embodiment.
  • FIG. 17 is a diagram conceptually showing the light emitting operation of the pixel and the display surface of the above embodiment, in comparison with a CRT method and a normal liquid crystal display element.
  • FIG. 18 is a view conceptually showing a liquid crystal display device according to a ninth embodiment of the present invention.
  • FIG. 19 is a diagram conceptually showing the operation of the shutter of the display device of the above embodiment.
  • FIG. 20 is a diagram conceptually showing a display device according to the tenth embodiment of the present invention.
  • FIG. 21 is a diagram showing a sequence of continuous images focused on by the eleventh embodiment of the present invention.
  • FIG. 3 is a diagram conceptually showing the creation of an intermediate image.
  • FIG. 22 is a configuration diagram of the liquid crystal display device of the above embodiment.
  • FIG. 23 is a diagram conceptually showing a circuit for display according to the 12th embodiment of the present invention, in comparison with a conventional circuit.
  • FIG. 24 is a diagram conceptually showing brightness and transmittance waveforms and the like of the above embodiment in comparison with those of other systems.
  • FIG. 25 is a diagram conceptually showing a circuit for display according to the thirteenth embodiment of the present invention.
  • FIG. 26 is a diagram conceptually showing a circuit for display in the fourteenth embodiment of the present invention.
  • FIG. 27 is a diagram conceptually showing a circuit for display in the fifteenth embodiment of the present invention.
  • FIG. 28 is a diagram showing the operation of the sixteenth embodiment of the present invention.
  • FIG. 29 is a diagram showing the configuration of the seventeenth embodiment of the present invention. (Explanation of code)
  • a display device that drives a so-called OCB mode liquid crystal by TFT is used.
  • the response time was 8 ms.
  • the 0CB mode is described in detail in, for example, Japanese Patent Publication No. 7-84244. Further, the configuration (structure) of a cell using a 0CB mode liquid crystal is described in, for example, Reference 5. A panel using the 0 CB mode liquid crystal of the present embodiment was also prepared in the same manner. Reference 5: Uchida et al., “IDRC, 97” (19997) p 3 7 For this reason, the description of the structure of the 0 CB mode itself is omitted. In addition, a method using a flash lamp as a lighting method for moving images was adopted, and this is described in detail in Reference 6.
  • the CB mode liquid crystal display device that uses a TFT (thin film transistor) to drive the pixels has a normal video signal as shown in Fig. 3.
  • 3 is a light guide.
  • 4 is a high-speed switch.
  • 5 is a switching section.
  • the display surface is a game machine, the display of a movie recorded on a VTR, a part of other equipment such as an OA equipment such as a single processor (display part).
  • OA equipment such as a single processor
  • each video screen is synchronized with vertical synchronization. On and off at high speed.
  • the light amount of the flash lamp is not shown so that the brightness of the display surface does not differ between video and still images. It is, of course, acceptable to do so.
  • an intermediate image is created and inserted.
  • the field frequency is doubled (120 Hz) instead of the flash lamp, and the display corresponding to the moving image is displayed. As in the embodiment, a display without poke was obtained.
  • FIG. 4 The left side (1) of the figure shows the contents of the image data transmitted in order.
  • (2) is the content of the intermediate image created in order based on the transmitted image data.
  • the black squares 6 1 to 6 3 on the display surface 19 1 are lower right than upper left on the screen. Go to.
  • intermediate images 61 2 and 62 3 showing the movement of a black square in the middle are created. Then, the images are displayed in the order shown by the thick arrows in the figure.
  • FIG. Fig. 4 shows the image data displayed in this case.
  • the interval between the vertical white circles “ ⁇ j” is 1/60 seconds, and the interval between the decimal point “.” And ⁇ is 1/120 seconds.
  • the data of the screens of numbers 1, 2, ... shown in the horizontal direction at the top of the figure are transmitted at 1/60 second intervals.
  • the data of each screen is first branched into two.
  • the branched one is delayed by 1/40 seconds (1/60 seconds + 1/90 seconds) of the screen that has already arrived 1/60 seconds ago.
  • An intermediate image is created by taking the average value of the data and the average.
  • the created intermediate image is used for display at 1/120 second after the arrival of the image (1/40 second after the arrival of the next image).
  • the other branch is stored for 1/60 of a second and then branched into two more.
  • the branched 1 is used for display as it is with a delay of 1/60 second after arrival.
  • the data branched again is stored for another 1/120 second, and then the average value of the data of the next screen arriving 1/60 second later and 1/60 second after arrival It is used for display 40 seconds later (1/120 seconds after the next image arrives).
  • the averaging process actually requires some time and there are some time lags between the two adjacent screens, but these are not appropriate. Of course, they are compensated.
  • Fig. 6 shows the configuration of the main part of this device.
  • 11 is an image receiving unit.
  • Reference numeral 2 denotes an image distribution unit.
  • 13 is an odd-numbered image storage unit.
  • 14 is an even-numbered image storage unit.
  • 1 5 is FIFO This is a 1/60 second delay circuit with 16 is a 1/120 second delay circuit similarly.
  • Reference numeral 17 denotes an averaging circuit, which has a delay circuit and memory (not shown). 19 is a display unit.
  • the display control unit switches the display cycle of the display unit from 1/60 second to 1/120 second when displaying a moving image, and for that purpose, Select the image to be displayed.
  • the screen data sent from the two 1/60 second delay circuits and the averaging circuit are appropriately selected and used for display.
  • one intermediate video is generated, but the number of intermediate video is not limited to this. Increasing the number of intermediate images results in a smoother image. At this time, if the number of intermediate images is increased, it is necessary to increase the frequency for displaying images accordingly.
  • the image is created. If the first image is A, the next image is B, and the number of images inserted and displayed in the middle is 2, the first intermediate image is created. The image is (2A + B) / 3, and the next intermediate image is (A + 2B) / 3. Similarly, when the number of images is 3, the displayed intermediate images are (3A + B) / 4, (A + B) / 4, and (A + 3B) / 4 in that order. In addition, it may be created from two images before and after. In addition, it is also acceptable to provide for a change of a scene and a channel of a user. However, they are not difficult to understand, both technically and technically, and will not be described further.
  • intermittent driving is performed as a driving method corresponding to a moving image.
  • half the black screen is put in one field, but this also gave results with less blur.
  • the brightness of the lighting no, 'right'
  • the brightness will be halved compared to a still image.
  • the luminous intensity of this was doubled.
  • FIG. 7 shows a configuration of a main part of the present embodiment.
  • 11 is an odd-numbered image left-side truncated portion.
  • Reference numeral 12 denotes a right-side truncated portion of the even-numbered image.
  • 22 is an intermittent display control unit.
  • the intermittent display control unit alternately sends the black image on the left or right half to the display unit at a period of 1/60 second, and also displays the By controlling the luminous intensity twice, a video-compatible display is achieved.
  • the present embodiment relates to a liquid crystal display device that displays a moving image and a still image separately.
  • a video signal is provided with a video detecting means so that a video signal is automatically displayed corresponding to a moving image.
  • driving is performed for moving images as in the first embodiment, and in the case of a still image, driving is performed for still images.
  • a clock signal, a luminance signal This is done by detecting the presence or absence of the carrier color signal.
  • the configuration of the main part of the device in this case is shown in Fig. 9 (a).
  • reference numeral 25 denotes a communication protocol storage unit.
  • 26 is a signal detection determination unit.
  • Reference numeral 27 denotes a moving image corresponding display control switching unit.
  • the signal detection determination unit determines whether or not the image signal transmitted from the image receiving unit to the display unit is a moving image based on various communication protocols, and switches the display corresponding to the moving image if the image signal is determined to be a moving image. Switch the necessary display to the section.
  • the switching is performed by doubling the display cycle, intermittently displaying the image, and simultaneously reducing the light intensity of the light source by two times. And so on.
  • a video is a moving image is not determined from the signal of the image, but is detected by a switch or button operation by the user of the device. Of course, you can do it.
  • the configuration in this case is shown in (b). Specifically, if the channel of the television receiver is selected, the determination unit 30 determines that the video is a moving image, and the keyboard is operated. If not, it is determined to be a still image.
  • the present embodiment relates to a liquid crystal display device that determines whether or not a video is a moving image by focusing on the difference between the signal of the previous screen and the currently received signal, particularly, the difference of the signal level described above. .
  • FIG. 10 shows the configuration of the main part of the present embodiment.
  • 30 is a judgment unit.
  • 31 is a sampling point sampling unit.
  • Reference numeral 32 denotes a sample point data storage unit.
  • 33 is a comparison section.
  • Reference numeral 34 denotes a moving image corresponding display control unit.
  • Reference numeral 35 denotes various moving image display processing units.
  • the sample point sampling unit samples pixel data determined in advance from the data ⁇ of each screen received by the image receiving unit and notifies the comparing unit.
  • the comparison unit compares the data of the sample point one screen before stored in the sample point data storage unit with the data notified from the sample point sampling unit, and performs a predetermined operation. Then, the difference is obtained, the difference is sent to the judgment unit, and the notified data is sent to the sample point data storage unit composed of the FIFO, and the storage contents are updated. Let it go.
  • the determination unit determines whether the image is a moving image or a still image based on the transmitted difference, and notifies the determination result to the moving image corresponding display control unit.
  • the moving image display control unit When the moving image display control unit is notified that the image is a moving image, the moving image display control unit causes the various moving image display processing units and the display unit to display the image corresponding to the moving image.
  • liquid crystal display device of the present embodiment even if a still image is displayed even if a video recorded on a tape or a video being broadcast is displayed. , The corresponding display is automatically performed. This makes it even easier to see.
  • the viewer rarely sees the edge and the periphery of the display surface. Specifically, for example, in the case of the actual situation of baseball, only the pitcher and the pole in the center of the screen are seen, and the spherical wall in the background and the lawn in the lower part are not seen.
  • the displayed images are located near the center of the display surface.
  • the sheriff and the villain glaring in the Western play are displayed on the left and right edges of the screen, but in such a case, the sense of urgency is mainly displayed.
  • the quality of the video does not make much sense. Therefore, only the center part of the screen is displayed for moving images.
  • the display device of the present embodiment has been noted above, and its configuration is shown in FIG. 11A.
  • reference numeral 40 denotes a dividing part.
  • Reference numeral 41 denotes a display device, 42 denotes a peripheral drive unit therein, 43 denotes a central drive unit, and 44 denotes a central drive unit for displaying moving images. It is a moving image corresponding control unit that performs such control.
  • 4 5 is a switch.
  • the dividing unit divides the image data from the image receiving unit into a peripheral one and a central one, and sends them to the peripheral driving unit and the central driving unit, respectively. If the determination unit determines that the image is a moving image, the image data from the classification unit to the central drive unit is determined. Switch the switch to send the video to the video control unit.
  • the moving image corresponding control unit displays the transmitted image data in the center of the display surface in correspondence with the moving image. For this reason, necessary processing such as lighting of the dedicated backlight only for this section is also performed.
  • FIG. 11 shows a schematic configuration of the display surface of this device viewed from the back side.
  • Reference numeral 46 denotes a display element section in the center, which is on the viewer side. 47 is a peripheral display element section on the back.
  • the display is easy without jitters and the like without deteriorating the quality of the moving image, and all prices are compatible with the moving image. It will be easier.
  • gradation display is performed without inserting a black screen in order to make it easy to view a moving image.
  • the inventor of the present application discovered that the phenomenon that response was slow and an afterimage was seen was remarkable in a halftone image. That is, when a bright image moves, the afterimage is inconspicuous.
  • the voltage adjustment method and the time division gray scale display method are used in combination with the gray scale display method.
  • the liquid crystal display device of this embodiment is particularly effective when used in a display portion of a television receiver or the like where smooth movement is important.
  • office automation (OA) terminals such as computers have become more and more heavily used for AV applications, and as a result, there is no significant effect on these.
  • the display device used an active matrix substrate using TFT, and the liquid crystal used was a high-speed response OCB mode liquid crystal of 3 ms.
  • the display method is as follows. One frame (display interval) is divided into the first and second subframes (images displayed at the first display interval) and the second subframe (second half). (The image displayed at the display interval of) is divided into the images, and the driving method that uses both the voltage adjustment method and the 1-bit time-division gradation display method is used.
  • FIG. 12 schematically shows a display method of the display device according to the present embodiment. It is shown carefully.
  • (a;), (b), (c), (d), and (e) have gradation levels of 0%, 30%, 50%, 70%, and 10%, respectively.
  • the drive waveform at 0% is shown.
  • the gradation level is 50% or more, the second subframe in the latter half is fixed and applied at the maximum voltage. If the gradation level is 50% or less, the applied voltage of the second subframe in the latter half will be the minimum.
  • the first subframe applies a variable voltage value using a voltage adjustment method.
  • the applied voltage of the first subframe is adjusted so that when the gradation level is 50% or less, it becomes the maximum voltage at 50%.
  • the gradation level is 50% or more, the value is obtained by subtracting 50% from the gradation level (that is, the difference is 0 to 50%). Therefore, the maximum value is reached at 50%.
  • the minimum voltage is a voltage at which the brightness becomes the lowest, a slight bias voltage is applied, and interpolation is performed during that time.
  • the second subframe corresponds to the maximum bit when the gradation data is digitally described, and the remaining sub-frames are analog-output. Is the first subframe. At this time, it indicates that 1-bit time-division gradation display is to be performed.
  • FIG. 13 shows the applied waveform in the response between gray levels.
  • (A), (b), and (c) in the figure show the inter-grayscale responses of 30% to 0%, 30% to 100%, and 60% to 0%, respectively.
  • the display blinks at every subframe when the display is 50% or less. This is the same as introducing a pseudo black screen.
  • a black screen is inserted just before the change, and the response is speeded up. .
  • the drawback that the effect of improving the response speed is reduced at gradations of 50% or more is lower. is there .
  • this gradation region does not pose any problem even if the response is slow.
  • the liquid crystal display device of the present embodiment has a great advantage that the brightness is not reduced at all.
  • the liquid crystal display element used in the present embodiment uses a 0 CB mode liquid crystal, so that a sufficient response can be obtained.
  • the speed was fast, and the change in the amount of transmitted light was almost the same as the drive waveform.
  • a normally black display which provides a black display when the voltage is low is used.
  • the liquid crystal itself and the OCB mode are not limited. In other words, for example, even for a TN type liquid crystal element with a response speed of about 80 ms, which is commonly used, if the drive voltage is increased to achieve high-speed response, The effects of the embodiment can be obtained.
  • the liquid crystal display device of the present embodiment can sufficiently exhibit its effects and performances by using 0 CB type liquid crystal display device, ferroelectric liquid crystal display device, and antiferroelectric liquid crystal. It is a display element, and it is needless to say that these are preferable. In addition to the liquid crystal, it is also good for a DMD type display element or the like. Note that the liquid crystal display device may be of a direct-view type or a projection type.
  • the present embodiment is divided into two subframes, it is needless to say that more subframes may be used. . In that case, higher-speed writing is required, but the effect of high-speed writing is high. In this case, if the length of the subframe is changed, gradation display can be satisfactorily realized.
  • the first, second, and third sub-frames are divided into one sub-frame and one sub-frame having a length of 1: 2: 4. Divide it into pieces.
  • the third subframe is set to ON.
  • the second subfield shall be set ON if the value obtained by subtracting the amount displayed in the third subframe from the displayed data exceeds 25%.
  • the first subframe displays the value obtained by subtracting the amount displayed in the second and third subframes from the display data using the voltage adjustment method. That is, the first sub-frame is performed by the voltage adjustment method, and the remaining sub-frames are divided into sub-frames of 1 j-bit time division. A gradation display method is used.
  • the subframe for performing the voltage adjustment method is the first subframe. Although it was a frame, it is a matter of course that the present invention is not limited to this. No matter where you place the subframe to which the voltage regulation method is applied, it is possible to insert a pause.
  • the present embodiment relates to a projection type display using a chopper.
  • FIG. 14 is a diagram conceptually showing the configuration of the display device of the present embodiment.
  • 311 is a light source.
  • 3 1 2 is a reflecting mirror.
  • 3 1 3 is the chino.
  • Numeral 314 is a liquid crystal display element (or a liquid crystal panel of a display device).
  • 3 15 is a projection lens.
  • 3 16 is a screen. Also, the arrows and the thick arrow-shaped boxes indicate each ray, the luminous flux and their direction.
  • the light source light 311 provided with the reflecting mirror 12 becomes an almost parallel light flux, and is incident on the liquid crystal panel 314.
  • An image is formed on the LCD panel 314, which is enlarged by the projection lens 315 and projected on the screen 316.
  • the chiton 311 is inserted between the light source 311 and the liquid crystal panel 314.
  • this chino is a large enough disk with a rectangular hole 3 1 3 1, and this disk rotates at high speed.
  • the light source light 311 is intermittently incident on the liquid crystal panel 314 through the opening 311.
  • the vertical length of the rectangular hole 3 131 is smaller than the vertical length of the liquid crystal panel 3 14, and the light emitted from the light source at a certain moment is It will illuminate a part of the cell.
  • the vertical size (H) of this hole is half that of the liquid crystal panel (2H).
  • the opening of this chipper 3 13 3 is the same as that of the liquid crystal scanning direction. Rotated to move.
  • the rotation speed of this capacitor is adjusted so that the scanning speed of the liquid crystal panel and the traveling speed of the holes are not only the same.
  • the phase was adjusted so that the hole illuminated the area where the new data was written by the scan and the hole was written at the same time.
  • an image is projected at the same time that the image at that point is projected. Project for only the time (1/120 seconds). After that, light is not transmitted because it is shielded by the chopper's shield.
  • the liquid crystal element at the horizontal line indicated by 600 shines for the image display, and at the same time, the tip of the opening 3 13 1 of the chino 3 13 Position. After a lapse of 1/120 seconds, the rear end of the opening comes to this horizontal line.
  • a 0 CB type liquid crystal element having a response speed of about 20 ms is used as the liquid crystal display element.
  • the response speed is the response time from dark to light when a voltage at which the transmitted light amount becomes 10% and a voltage at which the transmitted light amount becomes 90% are applied alternately. It is the sum of the response times from light to dark.
  • the response time is the time required for the change in transmitted light amount to change from 10% to 90%.
  • a chopper for shielding light from the light source was used, other mechanical shutters may be used. In other words, basically, any structure may be used as long as the opening moves in the direction of liquid crystal scanning.
  • the light-shielding portion of this chopper is made of an object that absorbs light, but it may be a reflector because it only needs to be able to shield light. Furthermore, when light is reflected to the light source side by using a reflector, the light flux can be reused, and the brightness can be improved.
  • a flash lamp was used in place of the light source and the chiono in this embodiment. In this case, it flashes in the same manner as in the present embodiment, but the flashing is not synchronized with the liquid crystal display. In this case as well, the effect of speeding up was found, but the effect of this embodiment was not seen. This is because there is an area displaying old display data at the moment when it is turned on.
  • a liquid crystal shutter is used instead of the chopper according to the above embodiment.
  • FIG. 18 conceptually shows the configuration of the projection type liquid crystal display device of the present embodiment.
  • reference numeral 341 denotes a liquid crystal shutter. Others
  • the same reference numerals are given to the same components as those in the above embodiment.
  • the projection display has a liquid crystal shutter 341 inserted between the light source 311 and the liquid crystal display panel 314.
  • This liquid crystal shutter has a structure in which a plurality of horizontal electrodes are arranged side by side, and as shown in Fig. 19, this is aligned with the scan direction of the liquid crystal panel. I let you do it.
  • this liquid crystal shutter needs to be switched at high speed.
  • a ferroelectric liquid crystal element capable of high-speed response and a ⁇ CB type liquid crystal element are used.
  • the response speed of the ferroelectric liquid crystal device was 20 as, and the response speed of the 0CB type liquid crystal device was 10 ms.
  • the drive voltage is increased, it is possible to further increase the speed.
  • the liquid crystal shutter has a high transmittance.
  • the above-mentioned ferroelectric liquid crystal element and 0CB type liquid crystal element have a low transmittance because a polarizing plate is used.
  • a scattering type liquid crystal such as an ordinary polymer-dispersed type liquid crystal element has a low light loss due to a high transmittance, but has a difficulty in high-speed response. For this reason, in the present embodiment, a response speed of 10 ms was obtained by using a high driving voltage of 30 V.
  • the projection type display device has been described as an example in the present embodiment, but it is needless to say that the present invention is not limited to this. That is, the effects of the present invention can be obtained by arranging a liquid crystal shutter on the back surface of the direct-view type liquid crystal display element.
  • the shutter means is almost the same as the liquid crystal display element.
  • the size is the same, and as a result, the overall size is reduced, and therefore, it can be easily applied to a direct-view display device.
  • This embodiment relates to the projection type display as in the previous two embodiments, but uses a prismatic mirror for the shutter means. It scans light.
  • FIG. 20 conceptually shows the configuration of the projection display of the present embodiment.
  • 361 is a prismatic mirror.
  • 36 2 is an integrator.
  • other configurations are the same as those in the previous two embodiments, and thus are denoted by the same reference numerals.
  • the light emitted from the lamp 311 is converted into a rectangular light beam via the integration circuit 362, which rotates at high speed. Irradiation is performed on prism 361. Then, the reflected light is applied to the liquid crystal panel 316. At this time, the luminous flux changes its reflection direction with the high-speed rotation of the prismatic mirror 361. Then, by making the scanning direction of the light reflected from the prism mirror 361 and the scanning direction of the liquid crystal panel 314 the same, the two Good high-speed display can be performed in the same manner as described in the embodiment.
  • micro mirrors that display by moving the angle of minute mirrors formed on a semiconductor crystal electrically, and 'Is (texis sense) It is also possible for the tool to produce and announce it.
  • a continuous video screen is analyzed to detect its movement
  • An intermediate image is formed by vector operation.
  • Figure 21 shows the movement of the video vector that is the subject of this embodiment.
  • a continuous image having a moving sequence of a screen (1), a screen (2), a screen (3). It is. In this case, it is classified into a case where the movement between images is small and a case where the movement is large. Only when the movement is large, the intermediate image is synthesized and displayed, focusing on the movement vector.
  • FIG. 22 shows the configuration of the liquid crystal display device of the present embodiment.
  • reference numeral 401 denotes a receiving unit.
  • Reference numeral 402 denotes a first input image memory, which is composed of a single screen FIFO.
  • Reference numeral 4003 denotes a motion comparing unit that detects and compares the motion between the frames that follow each other.
  • Numeral 404 denotes a judgment unit for judging the necessity of creating an intermediate image by comparing the comparison result of the comparison unit with a threshold value separately held.
  • Reference numeral 4005 denotes an intermediate image creation unit that creates an intermediate image when the determination unit determines that an intermediate image needs to be created.
  • Reference numeral 406 denotes a display control unit.
  • the display time of the image that has been resinized by the reception unit is set to a half field, and It is a display control unit that displays the intermediate image for the remaining half field.
  • Reference numeral 407 denotes a display unit using a liquid crystal.
  • the motion comparison unit of the present embodiment calculates the sum (absolute value) of the difference for each pixel of successive screens and compares this with a threshold value that is separately stored. Is detected. In addition to the above, focusing on the brightest pixel for each pixel, which is most noticeable to a normal viewer, and taking the difference in the change in that position. There are various means, such as recognizing the pixel in the center of the screen. However, some of these are technologies that are also employed in MPEG, for example, as shown in Fig. 21. Therefore, further description is omitted.
  • present embodiment is also an application of the second embodiment shown in FIGS. 4 to 6 in some aspects. Therefore, further description of the present embodiment will be omitted.
  • the present embodiment relates to a mechanism and a circuit for displaying a black screen.
  • FIG. 23 shows the circuit of the present embodiment in comparison with a conventional circuit.
  • (A) of this figure is a circuit of the present embodiment, and (b) is a circuit of the prior art.
  • 511 is TFT.
  • Reference numeral 512 denotes a pixel electrode.
  • 5 1 3 is the gate line.
  • 5 14 is a source line.
  • 5 15 is a discharging means.
  • Numeral 516 is a counter electrode.
  • 5 17 is a reference potential (line, earth).
  • the pixel electrode 5 1 2 is connected via the TFT 5 1 1. Is connected.
  • the TFT 511 When charging the pixel electrode, the TFT 511 is turned on by applying a high potential to the gate line 513, and the source line 511 and the pixel electrode are turned on. Make 5 1 2 conductive. At this time, a predetermined voltage is applied to the pixel electrode by applying a predetermined voltage to the source line. Next, the TFT transistor is turned off by applying a low potential to the gate line. At this time, since the source line and the pixel electrode have high resistance, the pixel electrode is open. At this time, the counter electrode 516 is the reference potential (earth). Connected to 7.
  • FIG. 24 (a) is a diagram conceptually showing a case where the same display is performed by CRT for comparison. This figure shows the case where the printing pattern is gradually increased in brightness.
  • FIG. 24 is a diagram showing a circuit of the display element of the present embodiment.
  • the present embodiment is characterized in that a resistor 515 as discharging means is inserted between the pixel electrode 512 and the reference potential 517. Due to this resistance, the charge accumulated between the pixel electrode and the counter electrode is slowly discharged, and the charge is discharged before the next write occurs. I'm doing it. The discharge time at this time follows the CR time constant. As a result, the transmittance as shown in (c) of FIG. 20 was obtained. As a result, high-speed response similar to that of CRT was obtained.
  • FIG. 25 shows the configuration of the present embodiment.
  • a reference potential wire 531 having the same potential as the counter electrode is drawn in parallel with the gate line 513.
  • a resistor 532 was inserted between the wiring 531 and the pixel electrode 512.
  • This resistor uses an amorphous silicon layer doped with an appropriate amount of impurities.
  • I used the "normally black mode" where the display is dark and no voltage is applied. As a result, good display characteristics were obtained as in the previous embodiment. (The 14th embodiment)
  • an ionic substance may be added to the liquid crystal. At this time, it was effective if the retention of the liquid crystal was 50% or less. In this case, the effect was obtained by reducing the auxiliary capacitance normally formed in the liquid crystal element and making it equal to or smaller than the pixel capacitance. The effect was obtained when the conductivity of the liquid crystal layer was 10 to 10 ⁇ cm or more, and more preferably 10 to 8 Q cm or more.
  • the display was in the “No-Mary Black Mode” where the display was dark and no voltage was applied.
  • FIG. 25 shows a conceptual circuit configuration of the present embodiment.
  • 533 is the resistance of the liquid crystal layer itself.
  • lowering the resistance value of the liquid crystal layer itself is not such a difficult technique, and further description of the present embodiment will be omitted.
  • This embodiment is almost the same as the previous two embodiments, but relates to the “normally one white mode”.
  • a power supply line 542 for supplying a black voltage is formed, and this is connected to the pixel electrode 521 via a resistor.
  • 542 is a power supply line for supplying a black voltage.
  • 5 4 1 is a power supply line.
  • Reference numeral 543 denotes a TFT for maintaining the potential. A high voltage is applied to the power supply line 542, and the power supply line 542 is held by a TFT transistor.
  • VH and VL are alternately applied to the power supply line 541, and this voltage corresponds to the black display voltage when applied to the source line. Then, an electrode wire 542 for holding this is formed, and this potential is held by the TFT transistor 543. Since the pixel electrode is connected to this power supply line 541 via a resistor, it achieves the characteristic of saturating toward black voltage, and achieves normally-white mode. It also realized high-speed riding.
  • the electric field supplied to a pixel electrode that is, the electric field supplied to a signal line
  • the electric field supplied to a signal line is often switched in polarity for each screen of an image or for each field.
  • the sign of the black display voltage is switched, for example, to +6 V and 16 V.
  • a waveform in which the power supply voltage value is switched every field was applied to the power supply line 542. For example, in the above-mentioned example, an alternating electric field of +6 v and 16 v was applied.
  • the present embodiment is not limited to one-field inversion drive, as a matter of course. That is, a method in which electric field inversion is performed at high speed, such as H inversion driving in which the polarity is switched every 1 (one horizontal line), may be used. What is required here is to apply a voltage corresponding to the black display of the source signal to the power supply line 542.
  • the present invention is not limited to a liquid crystal display element in a narrow sense, and may be an EL display element. Furthermore, any liquid crystal mode is acceptable, and a TN liquid crystal, an IPS liquid crystal, a 0CB liquid crystal, and a VA liquid crystal may be used.
  • the faster the response of the liquid crystal mode the higher the effect of speeding up.
  • the TN mode, the IPS mode, and the OCB mode in which the mode is basically high speed, in which a high voltage is applied, are suitable.
  • the EL element was basically fast, and the effect of the present invention was high.
  • the element If the element is high-speed, it can respond to the electric field that is discharged, and can achieve high-speed operation.
  • the response speed of the element When the black-and-white response was applied, the response speed of the element was effective when the response time, which is the sum of the rise time and the fall time of the response time, was 16 ms or less.
  • the present embodiment is similar to the seventh embodiment, except that the application time of the voltage pulse applied within one field time depends on the gradation of the image. The point of adjustment is different.
  • FIG. 28 shows the operation of the hold-type display element of the present embodiment.
  • A of this figure is the pixel gradation at the first, second, third, and fourth field times.
  • B shows the relationship between the applied voltage and time within the first, second, third, and fourth field times with respect to (a). .
  • the gradation is almost 1/3 as shown in (a), and therefore, as shown in (b).
  • T the time interval
  • This embodiment relates to a product in which some of the above embodiments are combined.
  • Figure 29 illustrates this.
  • this display device is not only capable of displaying moving images and still images, but is also appropriate for the content of the program. For this reason, image compression such as MPEG is also used, and in addition, it is possible to appropriately display a vision and the like.
  • image compression such as MPEG is also used, and in addition, it is possible to appropriately display a vision and the like.
  • the present invention has been described based on some embodiments, but it is needless to say that the present invention is not limited to these embodiments. That is, for example, the following may be performed.
  • the display is not limited to 60 frames per second, and the pixel density is, for example, compatible with hi-vision.
  • the liquid crystal is other than OCB mode.
  • the number of divisions of the display surface is further increased.
  • only the center part is in OCB mode.
  • the displayed moving images are recorded on tape or disk.
  • the intermittent drive is performed by doubling the field frequency. Therefore, in this case, the left half of the odd-numbered screen, the right half, the left half of the even-numbered screen, and the right half are displayed in this order.
  • the pixel position to be sampled for judging whether it is a moving image or not is also selected according to the contents of the broadcast program (position). .
  • Polarity reversal is performed for each unit block. 9) Whether a moving image or a still image is determined is based on the presence or absence of a change in the gradation of the pixel at a predetermined number of positions.
  • the function of detecting motion vectors is provided with the function of changing the target by broadcasting live news programs and sports. Whether a news program is available or not is determined by storing a separate program guide in advance and comparing it with the built-in calendar or timer. Is done.
  • the light source used as a light source is an LED, a semiconductor laser, an electronic light emitting device, etc., which are highly responsive to changes in luminance. ing .
  • An electro-optical crystal such as a bismuth silicon oxide is used as a hold-type display element.
  • the display device is not a hold type.
  • INDUSTRIAL APPLICABILITY As described above, according to the present invention, simple, low-cost, and excellent, especially in a hold-type display device such as a liquid crystal display device. It is possible to display moving images and images.
  • both types of display can be supported, and a good display can be obtained.
  • the wide and thin display device can be easily used as a common display component (part) for various devices such as televisions and word processors. It spreads.
  • the display surface is divided and displayed appropriately according to the type of screen. 89 / 8ioeLT, 89 ⁇ 3 ⁇ 4 M

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Abstract

Une image dynamique ou une image fixe est affichée de manière excellente sur un afficheur à maintien. Lorsqu'une image dynamique est affichée, un procédé d'attaque, un procédé d'éclairage approprié à une image dynamique, dont la création d'une image intermédiaire et d'une attaque intermédiaire, ou une combinaison des deux procédés sont utilisés. Par exemple, lorsqu'un image fixe est principalement affichée sur un écran OA, un procédé ordinaire pour attaquer un cristal liquide est adopté. Lorsqu'une image est affichée, il est déterminé si l'image est une image dynamique ou une image fixe et une attaque correspondante est assurée. L'affichage à gradation d'une image est également décrit.
PCT/JP2000/002868 1999-04-28 2000-04-28 Afficheur WO2000067248A1 (fr)

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JP2002236472A (ja) * 2001-02-08 2002-08-23 Semiconductor Energy Lab Co Ltd 液晶表示装置およびその駆動方法
US6970148B2 (en) 2001-07-10 2005-11-29 Kabushiki Kaisha Toshiba Image display method
CN101572077B (zh) * 2008-05-01 2012-02-08 佳能株式会社 帧速率变换设备和帧速率变换方法
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JP4015157B2 (ja) 2004-07-20 2007-11-28 シャープ株式会社 液晶表示装置の駆動装置、プログラムおよび記録媒体、並びに、液晶表示装置
US8264441B2 (en) 2005-03-31 2012-09-11 Sharp Kabushiki Kaisha Method for driving liquid crystal display apparatus
JP4574676B2 (ja) 2005-03-31 2010-11-04 シャープ株式会社 液晶表示装置の駆動方法
EP2264690A1 (fr) * 2005-05-02 2010-12-22 Semiconductor Energy Laboratory Co, Ltd. Dispositif d'affichage et procédé de commande d'échelles de gris avec sous-trames associées
CN101248482B (zh) * 2005-09-01 2013-08-28 夏普株式会社 液晶显示装置和液晶显示装置的驱动方法
KR101252879B1 (ko) * 2006-06-29 2013-04-09 엘지디스플레이 주식회사 액정표시장치 및 그의 구동방법
KR101315376B1 (ko) 2006-08-02 2013-10-08 삼성디스플레이 주식회사 표시 장치의 구동 장치 및 그 영상 신호 보정 방법
JP2010039176A (ja) * 2008-08-05 2010-02-18 Sony Corp 画像表示装置及び画像表示装置の駆動方法
JP5817858B2 (ja) * 2014-01-30 2015-11-18 カシオ計算機株式会社 画像処理装置、画像処理方法、及びプログラム

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