EP1605434A1 - Dispositif et procédé utilisé pour suppresser le phénomène des plages floues entre trames dans un procédé de simulation d'un ecran CRT du type pulsé - Google Patents

Dispositif et procédé utilisé pour suppresser le phénomène des plages floues entre trames dans un procédé de simulation d'un ecran CRT du type pulsé Download PDF

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Publication number
EP1605434A1
EP1605434A1 EP04253520A EP04253520A EP1605434A1 EP 1605434 A1 EP1605434 A1 EP 1605434A1 EP 04253520 A EP04253520 A EP 04253520A EP 04253520 A EP04253520 A EP 04253520A EP 1605434 A1 EP1605434 A1 EP 1605434A1
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Prior art keywords
value
time point
liquid crystal
backlight
time
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German (de)
English (en)
Inventor
Yuh-Ren Shen
Cheng-Jung Chen
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VastView Technology Inc
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VastView Technology Inc
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    • 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
    • G09G3/3406—Control of illumination source
    • 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
    • G09G3/3659—Control of matrices with row and column drivers using an active matrix the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude modulation of the brightness of the illumination source
    • 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
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • 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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only

Definitions

  • the present invention relates to the method and device used for eliminating the image overlap blurring phenomenon between frames in the process of simulating CRT impulse type image display, and more particularly, to the method and device used for eliminating the after image overlap blurring phenomenon between frames in the process of simulating CRT impulse type image display with liquid crystal display (LCD).
  • LCD liquid crystal display
  • LCD liquid crystal display
  • the flat display effect of LCD is apparently superior to the image display effect of CRT, and in addition, its power consumption and its heat dissipation are much lower than those of the similar size CRT display. Therefore, this type of display is usually considered as suitable to use in the following applications: portable (mobile) phone display unit, TV receiver, display, and panel in exhibition center or advertisement applications.
  • the LED utilized widely at present, which is subject to the limitations in various practical applications due to its inherent characteristics, such as, the LED is preferably used in the static display for numbers, characters, or images, and is not comparable to and can not match the LCD technology which is capable of dynamic image display and be able to achieve the effect of liveliness and vividness.
  • the image display of CRT utilizes the "impulse type "image display. It produces light emissions by means of irradiating a single electron beam on the pixels coated with fluorescence materials. However, the pixel only produces the emission of light in an instant of a minute portion of time in each frame period. Therefore, it seems that almost no visional overlapping phenomenon will be noticed for the images displayed between the frames.
  • the LCD image display utilizes the "hold type” image display due to the intrinsic property of the LCD material. It produces the image display through the optical response (namely, the gray level response) by means of applying driving voltages on the LCD material. Nevertheless, due to the limitation of the intrinsic property of the liquid crystal material, the image it displays occupies the predominant portion of time of that frame. And for each time its image changes, its luminance (or brightness) also changes step-wise sequentially. Therefore, from the viewpoint of the spectators, he may feel the overlapping of the image of the new frame on that of the old frame, thus creating the blurring of the image outlines and producing the phenomenon of the so-called "after-image".
  • the method utilized in this technology is a kind of so-called "over drive” method. It applies to the liquid crystal material the voltage (for example code 200) which is much higher than the originally set target voltage for example code 120), thus expediting and accelerating the optical response speed of the liquid crystal molecules, and accelerating them to reach the predetermined optical response value, and as such shortening the liquid crystal gray level response time to less than one frame period.
  • the voltage for example code 200
  • the inventor of the present invention proposed a "Method And Device Used For Simulating CRT Impulse Type Image Display” in pending Taiwan Patent Application No. 98103825 to overcome the shortcomings and limitations of the prior art.
  • the proposed method and device are mainly characterized in scanning the black lines, which is different from the prior art.
  • the period of the control voltage pulse used for the image display can be shortened to less than 8.3ms (which corresponds to 120Hz), and for which this period is adjustable, and the intervals of the scanning black lines applied during this period is also adjustable.
  • Taiwan Patent Application No. 98103825 is the continuation or extension invention of the inventor's another pending Taiwan Patent Application No. 98103825, with its purpose as solving and improving the problem of image overlap blurring between frames in the process of "simulating CRT impulse type image display".
  • Taiwan Patent Application No. 98103825 is the continuation or extension invention of the inventor's another pending Taiwan Patent Application No. 98103825, with its purpose as solving and improving the problem of image overlap blurring between frames in the process of "simulating CRT impulse type image display”.
  • Taiwan Patent Application No. 98103825 is the continuation or extension invention of the inventor's another pending Taiwan Patent Application No. 98103825, with its purpose as solving and improving the problem of image overlap blurring between frames in the process of "simulating CRT impulse type image display".
  • the prior patent applications of the present inventor please refer to the prior patent applications of the present inventor, which will not be repeated here for brevity's sake.
  • the purpose of the present invention is to provide the method and device used for the eliminating the image overlap blurring phenomenon between frames in the process of simulating CRT impulse type image display, so as to solve and overcome the shortcomings and limitations of the above-mentioned related prior art .It controls and reduces the accumulated liquid crystal optical response during that interval to the lowest value desired by means of providing scanning black lines on the screen, and coupled with the reduction of backlight luminance to the appropriate low level, thus achieving for certain the purpose of simulating CRT impulse type image display. And by doing so, the present invention can effectively eliminate the phenomenon of image overlap blurring of the " after image" between frames. And as such, the present invention can significantly improve the image displaying quality of the LCD display, in addition to saving the extra cost and expense of the additional equipment.
  • the present invention provides a device used for eliminating the image overlap blurring between frames in the process of simulating CRT image display with LCD display.
  • Figure 1 indicates the schematic diagram of the structure of the liquid display panel and backlight module according to the Embodiment of the present invention.
  • Figures 2(a) to 2(d) illustrate the design and operation principle of the device of the present invention by means of the description of the relations of waveforms between the driving voltage pulse V LC of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq.
  • the solid line indicates the waveform of the liquid crystal driving voltage pulses V LC generated by the device of the present invention
  • its unit "code” is a kind of voltage unit
  • the dotted line indicates the waveform of the resulting optical response of the liquid crystal molecules with nits as its unit
  • the dotted line (c) indicates the waveform curve of the liquid crystal molecule optical response when the luminance of the backlight unit of the device has not been controlled and reduced to the sufficiently low level by the prior art
  • the dotted line (d) indicates the waveform curve of the liquid crystal molecule optical response when the luminance of the backlight unit of the device has been controlled and reduced to the sufficiently low level by the present invention.
  • the accumulated optical response of the said liquid crystal molecule can be reduced to the desired and sufficiently low level through scanning black lines on the display screen, and in cooperation with properly reducing the luminance of backlight unit as shown in the following Figure 2(c).
  • the point "a" on the liquid crystal optical response curve (c) of the prior art of Figure 2(a) can be lowered to point "b" on the liquid crystal optical response curve (d) of the present invention. Therefore, the "after image” overlap blurring phenomenon between frames N and N+1 can be eliminated, thus the present application can achieve the purpose of simulating CRT impulse type image display with LCD display, and this is the key point and characteristic of the present invention.
  • Figure 2 (b) it indicates the curve of the backlight control voltage (BV) with its unit as voltage (V), wherein BV1 is the value of the control voltage applied on the backlight unit during normal image display, while BV0 is the voltage applied when it is desired to reduce the luminance response of the backlight unit to the level required to eliminate the image blurring.
  • V voltage
  • the backlight unit can be line light source or point light source, which can be properly chosen from the following materials depending on the optical response and the image display desired to be achieved by the liquid crystal material and the effects of eliminating the after images: cold cathode fluorescence lamp (CCFL), light emitting diode (LED), organic light emitting diode (OLED), polymer light emitting diode (PLED), and electro-luminance (EL).
  • CCFL cold cathode fluorescence lamp
  • LED light emitting diode
  • OLED organic light emitting diode
  • PLED polymer light emitting diode
  • electro-luminance electro-luminance
  • Figure 2 (c) indicates the luminance (BL) response curve of the backlight unit with luminance as its unit.
  • BL1 is the backlight luminance response used during normal image display, namely, it represents the backlight luminance response value created when control voltage BV1 is applied on the backlight unit as shown in Figure 2 (b)
  • BL0 is the backlight luminance response value of the reduced backlight luminance, which in cooperation with black line scanning eliminate the after image between frames on the display screen.
  • the example shown in Figure 2(c) makes use of the cold cathode fluorescence lamp (CCFL), and as such its luminance response indicates the V shape, and it must take a certain period of time to reach its lowest point e. Therefore, its luminance response evidently indicates the phenomenon of time delay.
  • CCFL cold cathode fluorescence lamp
  • the luminance response of the backlight unit is the immediate-target-value mode response curve, and it is of deep well shape as shown in Figure 2(d), and the shape of the curve of backlight control voltage is also of deep well shape as shown in Figure 2(b).
  • the dotted line (c) in Figure 2(a) indicates the liquid crystal optical response curve (c) generated by the black line scanning as utilized in the above-mentioned another pending patent application of the present inventor, and curve (d) is the liquid crystal optical response resulting from lowering the luminance response of the backlight unit to the lowest value through the design of the present invention.
  • curve (d) is the liquid crystal optical response resulting from lowering the luminance response of the backlight unit to the lowest value through the design of the present invention.
  • another important characteristic of the present invention is that the following can be controlled and adjusted by means of controlling the duration of the voltage applied to the backlight unit: (1) starting point of the lowest value of the backlight unit luminance response; (2) the temporal width (namely, length) of the lowest value of the backlight unit luminance response; (3) the depth of the lowest value of the backlight unit luminance response; (4) the starting point of the lowest value of the liquid crystal accumulated optical response; (5) the temporal width (namely, length) of the lowest value of the liquid crystal accumulated optical response; and (6) the depth of the lowest value of the liquid crystal accumulated optical response.
  • the lowest value of the liquid crystal accumulated optical response generated by the above-mentioned backlight luminance adjust and control process is not limited to occur at certain point on the response curve.
  • the length of the temporal continuation of the lowest value of backlight luminance response can be adjusted by controlling the duration of the applied backlight voltage, so as to enable the lowest value of the liquid crystal molecule optical response to continue for an adjustable interval (for example, the portion of the horizontal linear section between time points A3 and A4 and between time points A6 and A7 as shown in Figure 2(a)). And as such, it can achieve for certain the purpose and effect of eliminating the "after image" overlap blurring between frames. Therefore, in the above-mentioned Figure 2(c), time point is used to illustrate the lowest point of the backlight luminance response; its purpose is only for simplifying the explanation and facilitating the understanding.
  • the advantage of backlight units made with LED or EL being superior to those made with CCFL are: its luminance response is of the immediate-target-value mode, and it can immediately reach the nominal luminance target response value as shown in Figure 2(d).
  • the backlight units made with LED or EL material can have a plurality of sequentially incrementing nominal target values, which can be applied to different designs.
  • its luminance response is slower as the gradual-target-value mode as shown in Figure 2(c), and it must take a certain period of time to reach the nominal luminance target response value after the backlight unit being applied the control voltage. Therefore, its contribution to the temporal width of reducing the liquid crystal accumulated optical response to the lowest value is smaller.
  • the luminance response of CCFL made with one kind of material usually has one nominal target value.
  • the present invention also relates the method used for eliminating the image overlap blurring between frames in the process of simulating CRT impulse type image display.
  • Figure 1 is a schematic view indicating the structure arrangement of a liquid crystal display panel and backlight unit according to all the embodiments of the present invention
  • Figures 2(a) to 2(d) indicate the relations of the waveform curves between the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq according to the embodiment of the present invention
  • Figure 3(a) is the schematic view indicating the pixel array formed by the cross points of a plurality of gate lines and data lines, and the simulation driving circuit formed by a plurality of data driver and gate driver according to the first embodiment of the present invention
  • Figure 3(b) represents the liquid crystal display simulation driving device according to the first embodiment of the present invention
  • Figures 4(a) to 4(d) indicate the relations of the waveform curves between the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq according to the first Embodiment of the present invention
  • Figure 5(a) is a schematic diagram indicating the pixel array formed by the cross points of a plurality of gate lines and data lines, and the simulation driving circuit formed by a plurality of data driver and gate driver according to the second embodiment of the present invention
  • Figure 5(b) represents the liquid crystal display simulation driving device according to the second embodiment of the present invention.
  • Figures 6(a) to 6(d) indicate the relations of the waveform curves between the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq according to the second Embodiment of the present invention
  • Figure 7(a) is the schematic diagram indicating the pixel array formed by the cross points of a plurality of gate lines and data lines, and the simulation driving circuit formed by a plurality of data driver and gate driver according to the third embodiment of the present invention
  • Figure 7(b) represents the liquid crystal display simulation driving device according to the third embodiment of the present invention.
  • Figures 8(a) to 8(d) indicate the relations of the waveform curves between the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq according to the third Embodiment of the present invention
  • Figure 9(a) is the schematic diagram indicating the pixel array formed by the cross points of a plurality of gate lines and data lines, and the simulation driving circuit formed by a plurality of data driver and gate driver according to the fourth embodiment of the present invention
  • Figure 9(b) represents the liquid crystal display simulation driving device according to the fourth embodiment of the present invention.
  • Figures 10(a) to 10(d) indicate the relations of the waveform curves between the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq according to the fourth Embodiment of the present invention
  • Figure 11(a) is the schematic diagram indicating the pixel array formed by the cross points of a plurality of gate lines and data lines, and the simulation driving circuit formed by a plurality of data driver and gate driver according to the fifth and sixth embodiments of the present invention
  • Figure 11(b) represents the liquid crystal display simulation driving device according to the fifth and sixth embodiments of the present invention.
  • Figures 12(a) to 12(d) indicate the relations of the waveform curves between the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq according to the fifth Embodiment of the present invention
  • Figures 13(a) to 13(d) indicate the relations of the waveform curves between the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq according to the sixth Embodiment of the present invention.
  • the waveforms displayed are mainly used as instruments or tools to describe the voltage applied on the liquid crystal molecule and the backlight unit, and the characteristics and behaviors of the liquid crystal molecule optical response and the backlight unit luminance response. And the features and advantages of the present invention will be explained based on the above descriptions.
  • the abscissa indicates time, and its units is millisecond (ms), with A1 to A7 as the sequentially progressing time points; and its ordinate indicates driving voltage, with "code” as its displaying unit.
  • the time of the waveform progression on the abscissa can be divided into (N-1)th, Nth, (N+1)th, (N+2)th, etc. equal frame time partitions as units of frame time.
  • the dotted lines in Figures 4(a), 6(a), 8(a), 10(a), 12(a), and 13(a) indicate the optical response (namely, the gray level response) path characteristic curves for the liquid crystal molecules under the application of various different driving voltages.
  • the optical response is the luminance displayed by the liquid crystal, and with nits (cd/m 2 ) as its unit.
  • the emphases in the waveform analysis of the Embodiment of the present invention is on the relation of waveform between the liquid crystal driving voltage pulse V LC , backlight control voltage BV, backlight luminance response BL, and the liquid crystal accumulated optical response Lq.
  • the reader would like to know the relations between the waveforms of the control voltage pulse G1, G1', and driving voltage pulses D 1 , D 1 , V LC , please refer to Taiwan Patent Application No. 98103825, which is another pending application of the present inventor. Therefore, its contents will not be repeated here for brevity's sake.
  • the backlight device used in the Embodiment herein utilizes the CCFL as example for illustration, and its optical response is the V-shaped gradual-target-value mode and indicates the phenomenon of time delay.
  • the present invention may also utilizes the backlight device made of LED, OLED, PLED, or EL material, which is able to similarly achieve the purpose and effect of "the method and device used for the eliminating the image overlap blurring phenomenon between frames in the process of simulating CRT impulse type image display".
  • the luminance response of the backlight device made of the said materials indicates the immediate-target-value mode of U shape deep well (see Figure 2 (d)).
  • the shape of the waveform of the accumulated liquid crystal optical response is very similar to those with the CCFL as the example in the following Embodiments, though with slight variation.
  • the waveform analysis in the specification is based on using CCFL as the backlight device, however, as to the detailed description and details of the waveform analysis of the accumulated liquid crystal optical response curve induced and generated by the backlight device made of LED, OLED, PLED or EL, the interested reader can easily infer and obtain the related information based on the above description and the waveform analysis of each of the following Embodiments. Therefore, they will not be described in detail here one by one, so as to avoid unnecessarily making the said waveform analyses appear to be too complicated.
  • FIG. 1 it indicates the structure arrangement of the liquid crystal display panel and backlight unit used according to the first embodiment of the present invention.
  • Figure 3(a) indicates the pixel array formed by the cross points of a plurality of gate lines and data lines, and the simulation driving circuit formed by a plurality of data driver and gate driver according to the first embodiment of the present invention.
  • Figure 3(b) represents the liquid crystal display simulation driving device according to the first Embodiment.
  • Figures 4 (a)-4(d) indicate the relations of the waveform curves between the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq generated by the image blurring elimination device of Figures 1, 3(a), and 3(b) of the present Embodiment.
  • the image blurring elimination device comprises: a first input control line (G 1 ); a second input control line (G 1 ,); a first input data line (D 1 ); a second input data line (D 1' ); a first capacitor (C S ); a second capacitor (C LS ); driving voltage output line; a first transistor(Q) comprising a first gate connected to the first input control line (G 1 ), a first source connected to the first input data line (D 1 ), and a first drain connected to the driving voltage output line and the first capacitor (C S ) and the drain of the second transistor(Q'); and a second transistor (Q') comprising a second gate connected to the second input control line (G 1 ,), a second source connected to the second input data line (D 1' ), a second drain connected to the drain of the first transistor and the second capacitor (C LC ) and driving voltage output line; wherein the said first capacitor and the said second capacitor are storage capacitor and liquid crystal
  • the following is the image blurring elimination method used for the image blurring elimination device according to the first embodiment of the present invention, comprising the following steps: (I) providing the first control signal (G 1 ) with periodic pulse waveforms to the first gate of the first transistor (Q) of the said circuit; (II) providing the second control signal (G 1 ,) with periodic pulse waveforms to the second gate of the second transistor (Q') of the said circuit; (III) the second control signal (G 1 ,) is the same as the first control signal (G 1 ) except the phase delay; (IV) providing the first data signal (D 1 ) to the source of the first transistor (Q) of the said circuit, when activated by the said first control signal (G 1 ), the said circuit feeds the first data signal (D 1 ) to the said driving voltage output line; (V) providing the second data signal (D 1 ,) to the source of the second transistor (Q') of the said circuit, when activated by the said second control signal (G 1 ,), the said circuit feeds the second data
  • the driving voltages V 1 , V 2 , and V 3 can be considered as a kind of voltage value expressed in "code".
  • the said driving voltage can reach its target voltage momentarily, however, the liquid crystal molecules have to take a certain period of response time to reach its optical response target position after being applied the driving voltages. This is due to the intrinsic property of the liquid crystal.
  • this voltage indicates the phenomenon of alternating positive and negative phases during the control and driving process of the liquid crystal (namely, the waveforms of the pulses of driving voltage V LC will indicate the phenomenon of alternating positive and negative phases relative to the reference voltage V COM ).
  • the driving voltage value V LC in the (N-1)th frame is V 1 , (code 0) of negative polarity, the value of backlight control voltage BV is BV0, and the value of backlight luminance response BL is BL0, and the value of accumulated liquid crystal optical response is Lq1; then
  • the waveform enters into the Nth frame, at this time the value of the driving voltage pulse V LC increases to V 2 (code 32) of positive polarity, and it remains so until time point A2, at this time the backlight control voltage BV increases to BV1, and the value of backlight luminance response BL increases gradually from BL0 to BL1, at this time the accumulated liquid crystal optical response Lq increases gradually from Lq1 at time point A1 to Lq2 at time point A2; then
  • time proceeds to time point A2, at this time the value of the driving voltage pulse V LC decreases from V 2 (code 32) to V 1 (code 0) of positive polarity, and the value of the backlight control voltage BV still remains at BV1, the backlight luminance response BL still remains at BL1, and the accumulated liquid crystal optical response decreases from Lq2 at time point A2, via time point A3 and then to value Lq1 at time point A4; then
  • time point A5 at this time the value of the driving voltage pulse V LC increases to V 1 , (code 0) of negative polarity, at this time the value of backlight control voltage BV still remains at BV1, the value of backlight luminance BL still remains at BL1, and the accumulated liquid crystal optical response steadily decreases via time point A6, then later decreases to Lq1 and then remains so until time point A7; then
  • the dotted line as shown in Figure 4(a) is the liquid crystal optical response characteristic curve produced while performing the simulation drive of CRT image display.
  • the output driving voltage of the simulation device between each time point is code 0 as shown in the figure, this means that the black line scanning is performed on the display screen during this period, and by doing so, it can achieve the same results as inserting black frame.
  • the luminance of the backlight unit is appropriately reduced by means of the design of the present invention, so as to enable the minimization of the accumulated liquid crystal optical response Lq, as such ensuring the elimination of the phenomenon of the "after image” overlap blurring between frames, and thus indeed achieving the purpose of simulating the CRT display impulse type image display with LCD display. And this is the most important advantage of the present invention over prior art.
  • Figure 1 indicates the structure arrangement of the liquid crystal display panel and backlight unit used according to the second embodiment of the present invention.
  • Figure 5(a) indicates the pixel array formed by the cross points of a plurality of gate lines and data lines, and the simulation driving circuit formed by a plurality of data driver and gate driver according to the second embodiment of the present invention.
  • Figure 5(b) represents the liquid crystal display simulation driving device according to the second embodiment.
  • Figures 6(a) to 6(d) indicate the relations of the waveform curves between the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq generated by the image blurring elimination device of Figures 1, 5(a), and 5(b) of the second Embodiment.
  • the image blurring elimination device of the second embodiment comprises: a first input control line(G 1 ); a second input control line (G 1 ,); a first input data line (D 1 ); a second input data line (D 1 ,); a third input data line (D'); a fourth input data line (D); a fifth input data line (Ds); a first capacitor (C S ); a second capacitor (C LS ); a third transistor(Q3); a fourth transistor(Q4); driving voltage output line; a first transistor(Q) comprising a first gate connected to the first input control line (G 1 ), a first source connected to the input data line (D 1 ), and a first drain connected to the driving voltage output line and the first capacitor (C S ) and the drain of the second transistor(Q'); a second transistor(Q') comprising a second gate connected to the second input control line (G 1 ,), a second source connected to the second input data line (D 1 ,
  • the following is the image blurring elimination method used for the image blurring elimination device according to the second embodiment of the present invention, comprising the following steps: (I) providing the first control signal (G 1 ) with periodic pulse waveforms to the first gate of the first transistor of the said circuit; (II) providing the second control signal (G 1 ,) with periodic pulse waveforms to the second gate of the second transistor of the said circuit, the second control signal (G 1 ,) being the same as the first control signal (G 1 ) except the phase delay; (III) providing the fifth data signal (Ds) to the sources of the third transistor (Q3) and fourth transistor (Q4) connected in parallel; (IV) providing the third data signal (D') to the gate of the third transistor (Q3); (V) providing the voltage pulse generated by the drain of the third transistor to the source of the first transistor (Q1) as the first data signal (D1), when the said first transistor (Q1) is activated by the first control signal (G1), the first data signal (D1) is fed by the said circuit to the driving voltage output
  • Embodiment 1 Since the description relating to the process of waveform progression of the present Embodiment is the same as that of Embodiment 1, please refer to the contents of "the waveform analysis" of Embodiment 1 for its clear and complete understanding, and it will not be repeated here for brevity's sake.
  • the dotted line as shown in Figure 6(a) is the liquid crystal optical response characteristic curve produced while performing the simulation drive of CRT image display.
  • the output driving voltage of the simulation device between each time point is code 0 as shown in the figure, this means that the black line scanning is performed on the display screen during this period, and by doing so, it can achieve the same results as inserting black frame.
  • the luminance of the backlight unit is appropriately reduced by means of the present invention, so as to enable the minimization of the accumulated liquid crystal optical response Lq, as such ensuring the elimination of the phenomenon of the "after image” overlap blurring between frames, and indeed achieving the purpose of simulating the CRT display impulse type image display with LCD display. And this is the most important advantage of the present invention over prior art.
  • the waveform of the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq output by the image blurring elimination device of the present Embodiment as shown above is the same as those of Embodiment 1, so as to avoid it being too complicated to understand in the process of explanation.
  • the waveform can be designed to have various variations according to the actual requirements of the LCD display.
  • Figure 1 indicates the structure arrangement of the liquid crystal display panel and backlight unit used according to the third embodiment of the present invention.
  • Figure 7(a) indicates the pixel array formed by the cross points of a plurality of gate lines and data lines, and the simulation driving circuit formed by a plurality of data driver and gate driver according to the third embodiment of the present invention.
  • Figure 7(b) represents the liquid crystal display simulation driving device according to the third embodiment.
  • Figures 8 (a) to 8 (d) indicate the relations of the waveform curves between the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq generated by the image blurring elimination device of Figures 1, 7(a), and 7(b) of the third Embodiment.
  • the image blurring elimination device comprises: a first input control line(G 1 ); a second input control line (G 1 ,); a first input data line (D 1 ); a first capacitor (C S ); a second capacitor (C LS ); driving voltage output line; a first transistor(Q) comprising a first gate connected to the first input control line (G 1 ), a first source connected to the first input data line (D 1 ), and a first drain connected to the driving voltage output line and the first capacitor (C S ) and the second drain of the second transistor(Q'); a second transistor(Q') comprising a second gate connected to the second input control line (G 1' ), a second source connected to ground, a second drain connected to the drain of the said first transistor and the second capacitor (C LC ) and driving voltage output line; wherein the said first capacitor and the said second capacitor are storage capacitor and liquid crystal equivalent capacitor respectively and are connected to ground, and the driving voltage output line is used to output the
  • the following is the image blurring elimination method used for the image blurring elimination device according to the third embodiment of the present invention, comprising the following steps: (I) providing the first control signal (G 1 ) with periodic pulse waveforms to the first gate of the first transistor (Q) of the said circuit; (II) providing the second control signal (G 1 ,) with periodic pulse waveforms to the second gate of the second transistor (Q') of the said circuit, the second control signal (G 1 ,) being the same as the first control signal (G 1 ) except the phase delay; (III) providing the first data signal (D 1 ) to the source of the first transistor (Q) of the said circuit, when activated by the said first control signal (G 1 ), the said circuit feeds the first data signal (D 1 ) to the said driving voltage output line; (IV) when activated by the second control signal (G 1 ), the ground potential voltage (code 0) is fed by the said circuit to the driving voltage output line; (V) outputting the said output driving voltages generated by the above steps to the
  • Embodiment 1 Since the description relating to the process of waveform progression of the present Embodiment is the same as that of Embodiment 1, please refer to the contents of "the waveform analysis" of Embodiment 1 for its clear and complete understanding, and it will not be repeated here for brevity's sake.
  • the dotted line as shown in Figure 8(a) is the liquid crystal optical response characteristic curve produced while performing the simulation drive of CRT image display.
  • the output driving voltage of the simulation device between each time point is code 0 as shown in the figure, this means that the black line scanning is performed on the display screen during this period, and by doing so, it can achieve the same results as inserting black frames.
  • the luminance of the backlight unit is appropriately reduced by the design of the present invention, so as to enable the minimization of the accumulated liquid crystal optical response Lq, as such ensuring the elimination of the phenomenon of the "after image” overlap blurring between frames, and indeed achieving the purpose of simulating the CRT display impulse type image display with LCD display. And this is the most important advantage of the present invention over prior art.
  • the waveform of the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq output by the image blurring elimination device of the present Embodiment as shown above is the same as those of Embodiment 1, so as to avoid it being too complicated to understand in the process of explanation.
  • the waveform can be designed to have various variations according to the actual requirements of the LCD display.
  • Figure 1 indicates the structure arrangement of the liquid crystal display panel and backlight unit used according to the fourth embodiment of the present invention.
  • Figure 9(a) indicates the pixel array formed by the cross points of a plurality of gate lines and data lines, and the simulation driving circuit formed by a plurality of data driver and gate driver according to the fourth embodiment of the present invention.
  • Figure 9(b) represents the liquid crystal display simulation driving device according to the fourth embodiment.
  • Figures 10(a) to 10(d) indicate the relations of the waveform curves between the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq generated by the image blurring elimination device of Figures 1, 9(a), and 9(b) of the fourth Embodiment.
  • the image blurring elimination device of the fourth Embodiment comprises: a first input control line(G 1 ); a second input control line (G m ); a first input data line (D 1 ); a first capacitor (C S ); a second capacitor (C LS ); a driving voltage output line; and a first transistor(Q1) comprising a gate connected to the first input control line (G 1 ) or the second input control line (G m ), a source connected to the input data line (D 1 ), and a drain connected to the driving voltage output line and two capacitors (C S , C LS ) connected in parallel; wherein the said first capacitor and second capacitor are connected to ground, and the driving voltage output line is used to output the driving voltage used for simulation to the said pixels of the LCD panel so as to display images, and including backlight unit with adjustable and controllable luminance and backlight input voltage control line; and characterized in that the said input data line is connected to a data driver, the said input
  • the following is the image blurring elimination method used for the image blurring elimination device comprising the following steps: (I) providing the data signal (D1) with periodic pulse waveform to the source of the said first transistor (Q1); (II) providing control signals OE and STH to the gate driver, so as to generate the synchronous control signals G1, Gm by the said gate driver and providing them to the gate of the said transistor (Q1) via the first and second input control lines; (III) when activated by the said synchronous control signals G1,Gm, the said circuit feeds the said data signal to the said driving voltage output line; (IV) outputting the said output driving voltage generated by the above steps to the said pixels so as to display images; and (V) during the interval of black lines scanning, when the luminance of the backlight unit is reduced to the lowest value through its control voltage, the accumulated liquid crystal optical response in that interval can be brought to the lowest value, so as to achieve the purpose and effectiveness of eliminating the after image overlap blurring between the frames.
  • the dotted line as shown in Figure 10 (a) is the liquid crystal optical response characteristic curve produced while performing the simulation drive of CRT image display.
  • the output driving voltage of the simulation device between each time point is code 0 as shown in the figure, this means that the black line scanning is performed on the display screen during this period, and by doing so, it can achieve the same results as inserting black frames.
  • the luminance of the backlight unit is appropriately reduced by means of the design of the present invention, so as to enable the minimization of the accumulated liquid crystal optical response Lq, as such ensuring the elimination of the phenomenon of the "after image” overlap blurring between frames, and indeed achieving the purpose of simulating the CRT display impulse type image display with LCD display. And this is the most important advantage of the present invention over prior art.
  • the waveform of the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq output by the image blurring elimination device of the fourth Embodiment as shown above is the same as that of Embodiment 1, so as to avoid it being too complicated to understand in the process of explanation.
  • the waveform can be designed to have various variations according to the actual requirements of the LCD display.
  • Figures 11(a), 11(b) and 12(a) to 12(d) as we explain the fifth embodiment of the present invention.
  • Figures 11(a) and 11(b) are used to describe the fifth Embodiment and the subsequent sixth Embodiment of the present invention, its purpose is to indicate that different image display effects can be achieved on the display screen by utilizing different control methods with the same device, and this characteristic will be discussed as follows.
  • Figure 1 indicates the structure arrangement of the liquid crystal display panel and backlight unit used according to the fifth embodiment of the present invention.
  • Figure 11(a) indicates the pixel array formed by the cross points of a plurality of gate lines and data lines, and the simulation driving circuit formed by a plurality of data driver and gate driver according to the fifth embodiment of the present invention.
  • Figure 11(b) represents the liquid crystal display driving simulation driving device according to the fifth embodiment.
  • Figures 12 (a) to 12 (d) indicate the relations of the waveform curves between the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq generated by the image blurring elimination device of Figures 1, 11(a), and 11(b) of the fifth Embodiment.
  • the image blurring elimination device of the fifth Embodiment comprises: a first input control line(G 1 ); a second input control line (G m+1 ); a third input control line (G 2m+1 ); a first input data line (D 1 ); a first capacitor (C S ); a second capacitor (C LS ); and a driving voltage output line; and a first transistor(Q) comprising a gate connected to the first input control line (G 1 ) or the second input control line (G m+1 ) or the third input control line (G 2m+1 ); a source connected to the first input data line (D 1 ), and a drain connected to the driving voltage output line and two capacitors (C S , C LS ) connected in parallel; and wherein the said first capacitor and second capacitor are the storage capacitor and liquid crystal equivalent capacitor respectively and connected to ground, and the driving voltage output line is used to output the driving voltage used for simulation to the said pixels of the LCD panel so as to display images, and
  • the following is the image blurring elimination method used for the image blurring elimination device comprising the following steps: (I) providing the data signal (D1) with periodic pulse waveform to the source of the said first transistor (Q1); (II) providing the OE and STH control signals to the first, second, and third output enable (OE) input lines and start pulse horizontal (STH) input lines of the said gate driver, and receiving the related signals via the said input lines, the said output enable (OE) signals input by the said gate drivers are so controlled that the two sets of synchronous control voltage pulses generated at the output of the said gate drivers are selected from the following three sets of control voltage pulses: (1) (G 1 , G m ), (2) (G m+1 , G 2m ), (3) (G 2m+1 ,G 3m ); and these two sets of control voltage pulses (1, 3), or (1, 2), or (2, 3) are selected from the said three sets of control voltage pulses and then arranged and combined, such that they are provided to the gate of the said
  • this voltage indicates the phenomenon of alternating positive and negative phases during the control and driving process of the liquid crystal (namely, the waveform of the pulse of driving voltage V LC indicate the phenomenon of alternating positive and negative phases relative to the reference voltage V COM ).
  • the driving voltage value V LC in the (N-1)th frame is V 1 , (code 0) of negative polarity, the value of backlight control voltage BV is BV0, and the value of backlight luminance response BL is BL0, and at this time the value of accumulated liquid crystal optical response is Lq1; then
  • the waveform starts entering into the Nth frame, at this time the value of the driving voltage pulse V LC increases to V 2 (code 32) of positive polarity, and it remains so until time point A2, at this time the backlight control voltage BV increases to BV1, and the value of backlight luminance response BL increases gradually from BL0 to BL1, at this time the accumulated liquid crystal optical response Lq increases gradually from Lq1 at time point A1 to Lq2 at time point A2; then
  • control voltage BV still remains at BV1
  • the value of backlight luminance BL still remains at BL1
  • the accumulated liquid crystal optical response decreases steadily via time point A6, then later decreases to Lq1 and then remains so until time point A7; then
  • the dotted line as shown in Figure 12(a) is the liquid crystal optical response characteristic curve produced while performing the simulation drive of CRT image display.
  • V LC of the simulation device between each time point is code 0 as shown in the figure
  • the luminance of the backlight unit is appropriately reduced by means of the design of the present invention, so as to enable the minimization of the accumulated liquid crystal optical response Lq, as such ensuring the elimination of the phenomenon of the "after image” overlap blurring between frames, and indeed achieving the purpose of simulating the CRT display impulse type image display with LCD display. And this is the most important advantage of the present invention over the prior art.
  • the waveforms of the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq output by the image blurring elimination device of the fifth Embodiment as shown above are the same as those of the subsequent sixth Embodiment, so as to avoid it being too complicated to understand in the process of explanation.
  • the waveforms can be designed to have various variations according to the actual requirements of the LCD display.
  • Figures 11(a), 11(b) and 13(a) to 13(d) as we explain sixth embodiment of the present invention.
  • Figures 11(a) and 11(b) are used to describe the sixth Embodiment and the preceding fifth Embodiment of the present invention, its purpose is to indicate that different image display effects can be achieved on the display screen by utilizing different control methods with the same device.
  • Figure 1 indicates the structure arrangement of the liquid crystal display panel and backlight unit used according to the sixth embodiment of the present invention.
  • Figure 11(a) indicates the pixel array formed by the cross points of a plurality of gate lines and data lines, and the simulation driving circuit formed by a plurality of data driver and gate driver according to the sixth embodiment of the present invention.
  • Figure 11(b) represents the liquid crystal display simulation driving device according to the sixth embodiment.
  • Figures 13 (a) to 13(d) indicate the relations of the waveform curves between the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq generated by the image blurring elimination device of Figures 1, 11(a), and 11(b) of the sixth Embodiment.
  • the image blurring elimination device of the sixth Embodiment comprises: a first input control line(G 1 ); a second input control line (G m+1 ); a third input control line (G 2m+1 ); a first input data line (D 1 ); a first capacitor (C S ); a second capacitor (C LS ); a driving voltage output line; and a first transistor(Q1) comprising a gate connected to the first input control line or the second input control line or the third input control line; a source connected to the first input data line (D 1 ), and a drain connected to the driving voltage output line and two capacitors (C S , C LS ) connected in parallel; and wherein the said first capacitor and second capacitor are the storage capacitor and liquid crystal equivalent capacitor respectively and connected to ground, and the driving voltage output line is used to output the driving voltage used for simulation to the said pixels of the LCD panel so as to display images, and including backlight unit with adjustable and controllable luminance and backlight input voltage control line
  • the following is the image blurring elimination method used for the image blurring elimination device comprising the following steps: (I) providing the data signal (D1) with periodic pulse waveform to the source of the said first transistor (Q1); (II) providing the OE and STH control signals to the first, second, and third output enable (OE) input lines and start pulse horizontal (STH) input lines of the said gate driver, and receiving the related signals via the said input lines, the said output enable (OE) signals input by the said gate drivers are so controlled that the three sets of synchronous control voltage pulses generated at the output of the said gate drivers are selected from the following three sets of control voltage pulses: (1) (G 1 , G m ), (2) (G m+1 , G 2m ), (3) (G 2m+1 , G 3m ); and these three sets of control voltage pulses (1, 2, 3) are provided to the gate of the said transistors (Q1) through the corresponding first, second and third input control lines, and characterized in that when activated by the said three sets
  • Embodiment 6 Since the description relating to the process of waveform progression of Embodiment 6 is the same as that of Embodiment 5, please refer to the contents of "the waveform analysis" of Embodiment 5 for its clear and complete understanding, and it will not be repeated here for brevity's sake.
  • the dotted line as shown in Figure 13 (a) is the liquid crystal optical response characteristic curve produced while performing the simulation drive of CRT image display.
  • the output driving voltage of the simulation device between each time point is code 0 as shown in the figure, this means that the black line scanning is performed on the display screen during this period, and by doing so, it can achieve the same results as inserting black frames.
  • the luminance of the backlight unit is appropriately reduced by means of the design of the present invention, so as to enable the minimization of the accumulated liquid crystal optical response Lq, as such ensuring the elimination of the phenomenon of the "after image” overlap blurring between frames, and indeed achieving the purpose of simulating the CRT display impulse type image display with LCD display. And this is the most important advantage of the present invention over prior art.
  • the waveforms of the driving voltage pulse of the liquid crystal molecules V LC , the backlight control voltage BV, backlight luminance response BL, and the accumulated liquid crystal optical response Lq output by the image blurring elimination device of the Embodiment 6 as shown above are the same as those of the preceding Embodiment 5, so as to avoid it being too complicated to understand in the process of explanation.
  • the waveforms can be designed to have various variations according to the actual requirements of the LCD display.

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EP04253520A 2004-06-11 2004-06-11 Dispositif et procédé utilisé pour suppresser le phénomène des plages floues entre trames dans un procédé de simulation d'un ecran CRT du type pulsé Withdrawn EP1605434A1 (fr)

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CN108694914A (zh) * 2018-07-30 2018-10-23 京东方科技集团股份有限公司 背光源驱动方法及其装置、可读存储介质和背光源

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US6392620B1 (en) * 1998-11-06 2002-05-21 Canon Kabushiki Kaisha Display apparatus having a full-color display
JP2003255912A (ja) * 2002-03-05 2003-09-10 Seiko Epson Corp 電気光学装置、それを用いた電子機器および電気光学装置の駆動方法

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US6392620B1 (en) * 1998-11-06 2002-05-21 Canon Kabushiki Kaisha Display apparatus having a full-color display
US20010003448A1 (en) * 1999-12-10 2001-06-14 Takashi Nose Driving process for liquid crystal display
JP2003255912A (ja) * 2002-03-05 2003-09-10 Seiko Epson Corp 電気光学装置、それを用いた電子機器および電気光学装置の駆動方法

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN108694914A (zh) * 2018-07-30 2018-10-23 京东方科技集团股份有限公司 背光源驱动方法及其装置、可读存储介质和背光源
US10950188B2 (en) 2018-07-30 2021-03-16 Beijing Boe Optoelectronics Technology Co., Ltd. Driving method of a backlight, driving device, backlight, display assembly and virtual reality apparatus

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