47 results about "Image persistence" patented technology

The invention provides a liquid crystal display device and a method for improving picture flash and image persistence. The device comprises a liquid crystal panel with N pixels, and a video controller capable of controlling display content of the liquid crystal panel; and the video controller displays a normal picture in modes that p is equal to n-m, p is equal to n+m and p is equal to n (n is more than m), and makes the normal picture reciprocate between p, n p and n pixels.

The invention provides a television, which comprises a signal demodulation module, a video decoding module, a video image scaling module, a display mode control module, a preset image providing module and a video display module, the signal demodulation module is used for receiving and demodulating television signals, the video decoding module is used for decoding television program video signals received by the television, the video image scaling module is used for scaling decoded video signals, so that the size of the processed video signal is matched with the size of the display area of the television screen, the video image scaling module includes two operating modes, i.e. an image full screen mode and an image filling mode, the display mode control module is used for selecting the operating mode of the video image scaling module, the preset image providing module is used for providing a preset filling image for the video image scaling module under the image filling mode, and the video display module is used for displaying scaled video images. The television can provide good visual experience for users and prevent the occurrence of the image persistence phenomenon. The invention also provides an image display method of the television.

To provide a liquid crystal aligning agent useful to obtain a liquid crystal alignment film which exhibits a high voltage retention characteristic even under high temperature conditions and which has a low accumulation charge, and a liquid crystal display device which is less susceptible to lowering of contrast or to image persistence.

A liquid crystal aligning agent comprising at least one selected from a polyamic acid obtained by reactive polymerization of a tetracarboxylic dianhydride component with a diamine component, and a polyimide obtained by cyclodehydration of the polyamic acid, characterized in that at least part of the tetracarboxylic dianhydride component is a tetracarboxylic dianhydride having an alicyclic structure or an aliphatic structure, and at least part of the diamine component is a diamine represented by the following formula (1):

(wherein two among R¹ to R¹⁰ are primary amino groups, and the rest are hydrogen atoms or monovalent organic groups other than primary amino groups, provided that they may be the same or different from one another), and a liquid crystal display device having a liquid crystal alignment film obtained from this liquid crystal aligning agent.

The invention provides a flat panel detector and a method for eliminating image persistence of vision of the flat panel detector. The method comprises that 1) the flat panel detector is used for exposure, a frame of original bright-field image and a frame of original dark-field image are collected, and a collection time point t1 of the original bright-field image is recorded; 2) the flat panel detector is used to continue exposure, another frame of original bright-field image and another frame of original dark-field image are collected, and a collection time point t2 of the original bright-field image is recorded; 3) according to a natural attenuation rule of the image persistence of vision as well as a time interval between t1 and t2, a weighting coefficient is obtained; and 4) the weighting coefficient obtained in the step 3) is used to compensate the original dark-field image collected in the step 1), and then implement persistence of vision correction on the original bright-field image collected in the step 2) by difference operation. The method of the invention is simple in process and simplified in algorithms, is highly practically and is high in the system integrated level.

To provide a liquid crystal aligning agent useful to obtain a liquid crystal alignment film excellent in liquid crystal alignment properties, alignment controlling power and rubbing resistance, having high voltage retention characteristics and having reduced charge accumulation, and a liquid crystal display device which is less susceptible to display failure, to lowering of contrast or to image persistence.

A liquid crystal aligning agent comprising a low resistance polyimide precursor having a volume resistivity of from 1×10¹⁰ to 1×10¹⁴ Ωcm when formed into a film, and a high alignment polyimide precursor or polyimide having a specific structure, and a liquid crystal display device employing this liquid crystal aligning agent.

Provided are: a liquid-crystal alignment material for obtaining liquid-crystal alignment films which are for use in the photo-alignment method and which, even when cleaned with a cleaning fluid, satisfactorily reduce the occurrence of image persistence; a liquid-crystal alignment film; and a liquid-crystal display element. The liquid-crystal alignment material for the photo-alignment method comprises: at least one polymer selected from among polyimide precursors represented by formula (1) and polymers obtained by imidizing the polyimide precursors; and an organic solvent. (X1 is a tetravalent organic group having a specific structure and R1 is a hydrogen atom or a C1-4 alkyl group.)

The present invention addresses the problem of: providing a liquid-crystal composition which has a high refractive index anisotropy ([delta]n), a low rotational viscosity ([gamma]1), and a large elasticity constant (K33) and further has a high voltage holding ratio (VHR) and a negative dielectric anisotropy ([delta][epsilon]); and providing a liquid-crystal display element of excellent display quality, which includes the liquid-crystal composition and is prevented or inhibited from suffering display failures including dropping marks, image persistence, and display unevenness and which combinesa low operating voltage, a high transmittance, and a high response speed. The liquid-crystal composition, which has negative dielectric anisotropy, has a value calculated by the following expression(I) in the range of 1-50: |[delta][epsilon]|/P*100 expression (I) where |[delta][epsilon]| is the absolute value of dielectric anisotropy and P ([mu]m) is the spiral pitch, and comprises one or more of compounds represented by the general formula (np-1) and the general formula (np-2).

The invention provides a flat panel detector and a method for reducing image persistence of the flat panel detector. The method comprises the steps of: implementing correction preprocessing operation on a target image and a contrast image; realizing function calculation of an image persistence attenuation coefficient K and a glass leakage current compensation coefficient Kd according to variables such as a time interval and an exposure window between the contrast image and the target image; and finally subtracting image persistence from the target image through a subtraction formula, so as to achieve the purpose of reducing or eliminating the image persistence finally. By adopting a method of inserting the multi-frame automatically acquired contrast image in front of the target image, and performing formula calculation on pixel points containing image persistence information on the target image by utilizing the situation that the corrected contrast image has image persistence of the same property, the purposes of reducing or eliminating the image persistence is realized without increasing the existing hardware cost, and the method has the advantages of high integration, flexibility and considerable market application value.

The invention discloses a test method for image persistence of a display device. The test method comprises the steps of: controlling a first test region to display a first image and controlling a second test region to display a second image during a time period t1-t2, and controlling the first test region and the second test region to display the first image during a time period t2-t3; acquiring avariation L1(t) of luminance L1 of the first test region varying with time during a time period t1-t3, and acquiring a variation Y2 (t) of a test parameter Y2 of the second test region varying with time during the time period t1-t3; and calculating a value of a variation C(t) of an image persistence parameter C varying with time after noise removal during the time period t1-t3 according to C(t)=Y2(t)-K*L1(t). Since the noise is just removed by the difference between the Y2(t) and KL1(t), and the value of C(t) is the value after the noise is removed, the test result of the image persistence isnot affected by the noise.

Ceramic pigment-based, chemically-modified porous coatings can be used for enhancing image permanence of ink-jet image printing. Specifically, a porous coated media sheet, comprising a media substrate, having a porous coating coated thereon comprising a modified ceramic pigment including a fixer group and a stabilizer group, each covalently attached to the ceramic pigment is disclosed. Additionally, a method and system for preparing permanent ink-jet images is also provided.

The invention relates to a driving method of a liquid crystal display, which receives a display signal first, wherein the display signal comprises a plurality of image data and each image data includes an objective driving voltage; next, establishes an object function according to the object driving voltage and calculates an objective visual visibility according to the object driving voltage; then, modulates a driving voltage to a best visual display voltage and a voltage reference, upon which an adjusting function is established and an adjusting visual visibility is calculated; finally, adjusts the best visual display voltage and the reference voltage to allow the adjusted visual visibility equal to the objective visual visibility, and the best visual display voltage and the reference voltage adjusted are used for driving the display image data. The driving method has the advantages that visual comfort can be improved, image persistence can be reduced and response time can be shortened.

The invention discloses an array substrate, a display panel and a liquid crystal display device. The array substrate comprises a first substrate and a thin film transistor arranged over the first substrate, the thin film transistor is provided with a channel region, a first shading layer is arranged between the channel region and the first substrate, and a protective layer used for reducing the number of photo-generated carriers in the channel region is arranged over the channel region; the display panel comprises the array substrate, and the liquid crystal display device comprises the displaypanel. The invention can provide a design scheme for improving image persistence of a display. The number of the photon-generated carriers in the channel region is greatly reduced by absorbing photoelectrons or reducing the transmissible path of light; therefore, the liquid crystal polarization effect can be obviously reduced, the image residue is improved, the problem of image residue caused byphoton-generated carriers of an existing display panel is thoroughly solved, the quality of the display panel is remarkably improved, and the user experience is good.

The invention relates to a liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display device. The invention provides a liquid crystal aligning agent having a high voltage retention and low image persistence property. The liquid crystal aligning agent comprises a mixture of the following polyamic acid, its imidized polymer or other imidized polymers, in which the proportion of imide coupling units ranges from 5 to 80%. The polyamic acid is obtained by incorporating 1,2,3,4-cyclobutane tetracarboxylic acid dianhydride and 1,4-diaminocyclohexane, bicyclo[2.2.1]heptan-2,6-bis(methylamine), 1,3-bis(aminomethyl)cyclohexane, isophorone or alkyl substituted compounds of these diamines, as at least a part of a tetracarboxylic acid dianhydride and of a diamine compound.

The invention discloses an image drive method and a system as well as a liquid crystal display (LCD); wherein, the image drive method comprises the following steps: an overdrive operation for a pixel of a piece of primary color on a flat-panel display is implemented, a plurality of overdrive corresponding tables are provided to different primary colors, and the periods of the response time of the light-transmitting media for transmitting the primary color lights are differentiated to eliminate the aberration due to image persistence. Furthermore, the overdrive operation can be segmented into a plurality of overdriven operations to enhance the operating effects. The method has advantage of eliminating the image persistence aberration, which is caused by the different generating periods of the primary color lights of a scanning backlight unit on the flat-panel display. The image drive system comprises an overdrive circuit module and a display unit; the LCD comprises another overdrive circuit module, a source electrode drive circuit, a grid electrode drive circuit and a thin-film transistor liquid crystal panel.

The invention provides an IPS liquid crystal display with a Cs line disposed in the vicinity of a gate line in which a flicker and image persistence of a liquid crystal display is suppressed by shielding influence of an electric field diverging from the gate line. In the IPS liquid crystal display, a pixel surrounded by a first common electrode line includes the gate lines laid on an insulating substrate in parallel to each other, a first insulating film covering the gate lines and a Cs line with a wing part laid on the first insulating film in parallel to the gate lines between the neighboring gate lines wherein the hollow wing part of the Cs line is laid in the proximity of the gate lines at the end parts.

The purpose of the invention is to suppress image persistence. The structure if the invention is as follows: A liquid crystal display device comprising: scanning lines extending in a first direction and arranged in a second direction, video signal lines arranged to cross the scanning lines, a pixel area is surrounded by the scanning lines and the video signal lines, a pixel electrode is formed in the pixel area, wherein conductive wirings are formed over the video signal lines via an organic insulating film in a plan view in the display area where images are displayed, a width in the first direction of the conductive wiring is bigger than a width in the first direction of the video signal line, an amount that the conductive wiring protrude the video signal line in a plan view is essentially the same in both side of the video signal line.

Image permanence is always one of the most important attributes for thermal inkjet photo media. Currently, polyvinyl alcohol, cellulose and gelatin are the most common binders that have been used in inkjet media development. Both polyvinyl alcohol and cellulose do not provide very good image permanence. Gelatin does provide an excellent image permanence, but gelatin has severe curl problems at cold and dry conditions. Therefore, to find or develop a new binder to provide good image permanence and humid fastness is an important focus. The use of water-soluble polyvinyl acetal can provide not only the good light fastness and humid fastness on inkjet prints but also minimize the curl and stiffness issues at cold and dry conditions.

The invention relates to a display driving method, a device and electronic equipment. The method comprises the following steps: taking a preset time length as a time interval when the display time length of a display image reaches a time length threshold value, changing the pixel value of at least one color channel of the display image, obtaining an intermediate image corresponding to each time interval, and driving the display panel to display according to the intermediate image at each time interval. According to the embodiment of the invention, the problem of image persistence caused by the display image displayed for a long time can be improved and even eliminated, the display position of the display image on the screen is not changed, and the dynamic display of the display image is realized by changing the pixel value of the at least one color channel of the display image. On the premise that the branding phenomenon of the screen is effectively avoided, the situations of jumping, shaking and the like of the picture are avoided, needed software and hardware resources are low, and the method has the advantages of being high in efficiency and low in cost.

Provided are: a liquid crystal alignment film that exhibits good resistance to AC image persistence or residual DC-derived image persistence, and has good adhesion to a sealing agent; and a liquid crystal alignment agent that can be used to obtain a liquid crystal display element which inhibits in-plane variations in brightness during black displaying, and has excellent contrast characteristics. This liquid crystal alignment agent is characterized by containing component (A) and component (B). Component (A): a polymer (A) having a repeating unit represented by formula (1). Component (B): a polymer (B) having a repeating unit represented by formula (3). (In formula (1), R1-R4 each represent a hydrogen atom, a halogen atom, an alkyl group having 1-6 carbon atoms, or the like, at least one of R1-R4 is a group as defined above but, excluding a hydrogen atom. Y1 represents a divalent organic group having a moiety structure represented by formula (H). In formula (3), X3 represents a tetravalent organic group derived from an aromatic acid dianhydride, Y3 represents a divalent organic group having a moiety structure represented by formula (m). R30 represents a hydrogen atom or an alkyl group having 1-4 carbon atoms. Z31 and Z32 each represent a hydrogen atom or the like.) (Q3 represents -(CH2)n- (n is 2-20), any -CH2- may be substituted by -O-. Note that oxygen atoms are not directly bonded together. Any hydrogen atom on the benzene ring may be substituted by a monovalent organic group. * represents a bond.).