WO2013018647A1 - Procédé de correction de défaut de planéité de panneau d'affichage, circuit de commande et dispositif d'affichage - Google Patents

Procédé de correction de défaut de planéité de panneau d'affichage, circuit de commande et dispositif d'affichage Download PDF

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Publication number
WO2013018647A1
WO2013018647A1 PCT/JP2012/068949 JP2012068949W WO2013018647A1 WO 2013018647 A1 WO2013018647 A1 WO 2013018647A1 JP 2012068949 W JP2012068949 W JP 2012068949W WO 2013018647 A1 WO2013018647 A1 WO 2013018647A1
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WIPO (PCT)
Prior art keywords
image data
display
display panel
charge amount
compensation
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PCT/JP2012/068949
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English (en)
Japanese (ja)
Inventor
真介 横沼
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シャープ株式会社
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Publication of WO2013018647A1 publication Critical patent/WO2013018647A1/fr

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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
    • G09G3/36—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
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen

Definitions

  • the present invention relates to a display panel unevenness correction method, and more particularly to a technique for correcting display unevenness based on a change in cell thickness of a display panel.
  • luminance unevenness and color unevenness that occurs in a display image
  • display unevenness greatly affect image quality. It is necessary to correct appropriately.
  • Patent Document 1 discloses a technique for detecting a current flowing through a scanning line of a display panel in order to compensate for the temperature characteristics of the display panel.
  • the present invention has been made in view of such a situation, and an object thereof is to correct display unevenness caused by a change in cell thickness.
  • the present invention provides a display panel unevenness correction method for correcting display unevenness of a display panel having a predetermined cell thickness, wherein the display panel is applied by applying reference data to the display panel.
  • the amount of accumulated charge supplied to the display panel when reference data is applied to the display panel is calculated and compared with the amount of reference charge.
  • the accumulated charge amount changes based on the reference data, that is, the voltage applied to the display panel, and also changes based on the cell thickness of the display panel, that is, the distance between two glass substrates constituting the display panel.
  • the cell thickness of the display panel is managed so as to have a constant reference width, but may vary to a cell thickness different from the reference width due to variations in the manufacturing process. Therefore, the accumulated charge amount calculated when the reference data is applied may be different from the reference charge amount.
  • compensation image data is generated based on the result of comparing the calculated integrated charge amount with the reference charge amount. According to this unevenness correction method, the variation in the cell thickness of the display panel can be compensated using the compensation image data, and the display characteristics of the display panel can be maintained high.
  • Display image data corresponding to the reference data is set on the display panel.
  • a comparison result indicating a ratio of the accumulated charge amount to the reference charge amount is calculated, and the display image data is
  • the compensation image data is preferably generated by dividing by the comparison result.
  • the accumulated charge amount is proportional to the voltage applied to the display panel and inversely proportional to the cell thickness of the display panel. According to this display panel unevenness correction method, the amount of charge actually supplied to the display panel can be maintained at the reference charge amount by offsetting the variation in cell thickness with the voltage applied to the display panel. The display characteristics of the display panel can be kept high.
  • the display image data includes reference image data
  • the display image data is set from the reference image data
  • the reference data is equal to the reference image data. According to this display panel unevenness correction method, it is easy to calculate the compensation image data by using the reference image data that is the basis for setting the display image data as the reference data.
  • the display panel includes a plurality of display elements, and the compensation image data is generated for each display element.
  • the compensation image data differs for each display element because the cell thickness is different for each display element.
  • the compensation image data is generated for each display element, so that the display characteristics of each display element can be maintained high.
  • a first display element disposed at a center portion of the display panel and a second display element disposed at an end portion of the display panel are disposed.
  • a first accumulated charge amount in the first display element and a second accumulated charge amount in the second display element are calculated, and the compensation step uses the first accumulated charge amount to calculate the first accumulated charge amount in the first display element.
  • Compensation image data is generated, and second compensation image data in the second display element is generated using the second accumulated charge amount, and is further arranged between the first display element and the second display element.
  • intermediate compensation image data having an intermediate value between the first compensation image data and the second compensation image data is generated from the first compensation image data and the second compensation image data. preferable.
  • the cell thickness of the display panel usually varies continuously, and is arranged between the first display element arranged at the center of the display panel and the second display element arranged at the end of the display panel.
  • the compensation image data of the intermediate display element is an intermediate value between the first compensation image data in the first display element and the second compensation image data in the second display element.
  • the intermediate compensation image data of the intermediate display element is obtained from the first compensation image data and the second compensation image data. Generate. Accordingly, it is easier to generate the compensation image data than in the case where the accumulated charge amount is calculated for the intermediate display element and the intermediate compensation image data is generated from the accumulated charge amount.
  • the display panel includes a first substrate and a second substrate disposed to face each other, and a cell thickness between the first substrate and the second substrate is linear from an end portion to a central portion of the display panel.
  • the intermediate compensation image data is based on at least one of a distance between the first display element and the intermediate display element and a distance between the second display element and the intermediate display element. Preferably it is produced.
  • intermediate compensation image data of the intermediate display element is generated using the distance from the first display element or the second display element. By doing so, it is easy to generate intermediate compensation image data.
  • the display panel includes a first substrate and a second substrate disposed to face each other, and a cell thickness between the first substrate and the second substrate is a prescribed curve from an end portion to a central portion of the display panel. It is preferable that the intermediate compensation image data is generated based on the prescribed curve. When the cell thickness between the first display element and the second display element varies along the prescribed curve, the intermediate compensation image data of the intermediate display element is generated based on the prescribed curve, so that the intermediate compensation image is generated. Easy to generate data.
  • data indicating the prescribed curve is stored for each display element corresponding to the arrangement of the display elements.
  • the data of the prescribed curve for each display element is stored in advance, so that it is easy to generate intermediate compensated image data of the intermediate display element based on the prescribed curve.
  • the display panel has a plurality of selection display elements arranged at equal intervals in a first direction and a second direction orthogonal to the first direction.
  • the selection integration in the selection display elements is performed.
  • a charge amount is calculated, and in the compensation step, the compensated image data in the selected display element is generated using the selected integrated charge amount, and is further adjacent to a non-selected display element that is not the selected display element. It is preferable that the compensation image data is generated using the compensation image data of the selection display element.
  • the cell thickness of the display panel usually varies continuously.
  • the cell thickness of the non-selected display element that is not the selective display element is The value approximates the cell thickness of the adjacent selection display element. Therefore, the compensation image data of the non-selected display element is a value that approximates the compensation image data of the adjacent selected display element.
  • the compensation image data of the non-selected display element is generated using the compensation image data of the selected display element. This makes it easier to calculate the compensation image data than in the case where the accumulated charge amount is calculated for the non-selected display element and the compensation image data of the non-selected display element is generated from the accumulated charge amount.
  • the present invention is also embodied in a drive circuit that realizes the display panel unevenness correction method.
  • the present invention is a display panel driving circuit for displaying a display panel having a predetermined cell thickness, the display circuit applying a reference data to the display panel to display the display panel, and the reference data being applied. And calculating a cumulative charge amount by integrating the current supplied to the display panel, and comparing the cumulative charge amount with a reference charge amount set corresponding to the reference data. And a compensation circuit for generating compensation image data that compensates for variations in cell thickness.
  • this drive circuit when the display panel is displayed using the drive circuit, the display panel is displayed using the compensation image data corresponding to the variation in the cell thickness of the display panel, thereby displaying the display characteristics of the display panel. Can be kept high.
  • the present invention is also embodied in a display device that includes the above drive circuit and the display panel that performs display based on compensated image data compensated by the drive circuit. According to this display device, the display characteristics of the display device can be maintained high by displaying the display panel using the compensation image data corresponding to the variation in the cell thickness of the display panel.
  • the display panel is a liquid crystal display panel using liquid crystal.
  • the display characteristics of the liquid crystal display device are displayed by displaying the liquid crystal display panel using the compensation image data corresponding to the cell thickness variation of the liquid crystal display panel. Can be kept high.
  • FIG. 10 is a diagram for explaining image data correction processing according to the fourth embodiment.
  • the display device 10 includes a control circuit 12, a display unit 14, and a backlight control circuit 16.
  • the display unit 14 includes a liquid crystal panel 20 and a backlight unit 30.
  • the control circuit 12 includes a voltage generation unit 13 in addition to inputting a gate signal and a data signal, which are digital signals, to the liquid crystal panel 20 based on an input image supplied from an external device (not shown). Analog reference voltages VH and VL and a common voltage are input to the liquid crystal panel 20 to drive the liquid crystal panel 20.
  • the backlight control circuit 16 drives the backlight unit 30. The backlight control circuit 16 may drive the backlight unit 30 independently of the control circuit 12 if the backlight unit 30 may be driven in conjunction with the control circuit 12.
  • the backlight unit 30 is disposed on the back surface of the liquid crystal panel 20.
  • the backlight unit 30 includes a diffusion plate 32 and an LED 34 (Light Emitting Diode: light emitting diode) that is a light source.
  • the LED 34 is disposed to face the back surface of the diffusion plate 32.
  • the main surface of the diffusion plate 32 is disposed to face the liquid crystal panel 20.
  • the diffusing plate 32 the light from the LED 34 is incident from the back side, the incident light is transmitted with diffusion, and the diffused light is irradiated to the liquid crystal panel 20 from the main surface facing the liquid crystal panel 20.
  • the backlight unit 30 is a so-called direct type in which the LEDs 34 are disposed on the back side on the depth side and a diffusion plate 32 is disposed on the front surface.
  • FIG. 2 shows an equivalent circuit of the picture element 42.
  • the liquid crystal panel 20 includes two glass substrates 40A and 40B arranged to face each other.
  • a glass substrate 40A indicated by a solid line in FIG. 2 is provided with a plurality of gate lines 44 and a plurality of data lines 46 extending between the plurality of picture elements 42, and includes a switch device 48 and a pixel electrode 50.
  • the gate line 44 and the data line 46 extend in directions orthogonal to each other.
  • the switch device 48 is provided with a switch electrode 48A and data electrodes 48B and 48C.
  • the switch electrode 48A is connected to the corresponding gate line 44.
  • One data electrode 48 ⁇ / b> B is connected to the corresponding data line 46.
  • the other data electrode 48 ⁇ / b> C is connected to the pixel electrode 50.
  • the counter electrode 52 is disposed to face the pixel electrode 50 through liquid crystal molecules sealed between the glass substrates 40 ⁇ / b> A and 40 ⁇ / b> B.
  • the pixel electrode 50 and the counter electrode 52 are spaced apart by a cell thickness L indicating the distance between the glass substrates 40A and 40B.
  • a gate driver 26 and a source driver (an example of a drive circuit) 28 are mounted on the frame region 24 of the liquid crystal panel 20.
  • the gate driver 26 uses the gate signal and analog reference voltages VH and VL input from the control circuit 12 to generate a gate voltage for switching on / off the switch device 48 of the pixel 42, and passes through the gate line 44. The voltage is applied to the switch electrode 48A of each picture element 42.
  • the source driver 28 generates image data V to be applied to the pixel electrode 50 of the picture element 42 using the data signal input from the control circuit 12 and the analog reference voltages VH and VL, and each picture element via the data line 46. 42 pixel electrodes 50 are applied.
  • FIG. 3 shows the circuit configuration of the source driver 28.
  • the source driver 28 includes an image data generation circuit (an example of a display circuit) 60, a current detection circuit (an example of a calculation circuit) 62, a charge amount comparison circuit (an example of a compensation circuit) 64, and an image data correction circuit (a compensation circuit).
  • Example 66 shows the circuit configuration of the source driver 28.
  • the image data generation circuit 60 receives the data signal from the control circuit 12 and the display image data D from the image data correction circuit 66, and obtains the image data V from the input data signal and the display image data D.
  • the image data V is generated and applied to the data line 46.
  • the image data generation circuit 60 supplies a current to the data line 46 and supplies a charge amount necessary for generating the image data V to the pixel electrode 50 of each pixel 42.
  • the current detection circuit 62 detects the current flowing through the data line 46 and inputs the detected current value to the charge amount comparison circuit 64.
  • the charge amount comparison circuit 64 uses, based on the current value input from the current detection circuit 62, the current supplied to the data line 46 when the image data generation circuit 60 applies the image data V to the pixel electrode 50 of each pixel 42. Accumulated to calculate the accumulated charge amount.
  • the charge amount comparison circuit 64 stores a reference charge amount in advance, and inputs the calculated comparison result to the image data correction circuit 66.
  • the image data correction circuit 66 receives the analog reference voltages VH and VL from the control circuit 12, generates display image data D from the input analog reference voltages VH and VL, and inputs the display image data D to the image data generation circuit 60. Further, when the image data correction circuit 66 receives the comparison result from the charge amount comparison circuit 64, the image data correction circuit 66 corrects the display image data D based on the comparison result, generates the compensation image data H, and inputs it to the image data generation circuit 60. To do.
  • the image data generation circuit 60 generates the image data V using the compensation image data H after the display image data D is inputted or when the compensation image data H is inputted instead of the display image data D.
  • the control circuit 12 applies a gate voltage to the gate line 44 and applies image data V to the data line 46.
  • the amount of charge necessary to generate image data V in each picture element 42 through the switch device 48 while the switch device 48 is turned on by the input of the on voltage of the gate voltage is a pixel.
  • Supplied to the electrode 50 As a result, in the pixel 42, a voltage corresponding to the image data V is generated between the pixel electrode 50 and the counter electrode 52 due to the amount of charge supplied to the pixel electrode 50, and this voltage is applied to the liquid crystal molecules, thereby deflecting the liquid crystal molecules. Change.
  • the picture element 42 is set to a desired light transmittance, and the picture element 42 enters a display state.
  • a desired charge amount Q that needs to be supplied to the pixel electrode 50 of the picture element 42 in order to achieve a desired light transmittance is determined in advance.
  • This charge amount Q is expressed as follows using the cell thickness L and the image data V, the dielectric constant ⁇ of the liquid crystal molecules, and the area S of the pixel electrode 50.
  • the dielectric constant ⁇ of the liquid crystal molecules and the area S of the pixel electrode 50 are strictly controlled in the manufacturing stage, while the cell thickness L of the liquid crystal panel 20 may vary due to variations in the manufacturing process.
  • a spacer 54 having a reference width L ⁇ b> 0 is inserted into the frame area 24 adjacent to the display area 22. Therefore, the cell thickness L is set to the reference width L0 at the end of the display area 22.
  • the cell thickness L of the liquid crystal panel 20 is a thickness L1 different from the reference width L0
  • the image data V generated from the display image data D set based on the reference width L0 is used as the pixel electrode 50 of the picture element 42.
  • the desired charge amount Q cannot be supplied to the pixel electrode 50 of the picture element 42 even if applied to. Therefore, a desired light transmittance cannot be realized in the picture element 42, and display unevenness occurs.
  • the correction processing of the image data V is executed using the image data generation circuit 60 included in the source driver 28 of the liquid crystal panel 20.
  • Image data correction processing will be described with reference to FIG.
  • the image data correction process is executed for each picture element 42 of the liquid crystal panel 20.
  • display image data D is input from the image data correction circuit 66 to the image data generation circuit 60.
  • the display image data D is composed of a plurality of image data D0, D1,..., And these image data D0, D1,.
  • An example of data and reference image data) D0 is generated by resistance voltage division by a preset resistance group.
  • the source driver 28 starts processing upon receiving an image data correction processing instruction from the control circuit 12, and applies the reference image data D0 to the target pixel 42 (S2).
  • the current detection circuit 62 detects the current flowing through the data line 46 connected to the target pixel 42 (S4) and inputs it to the charge amount comparison circuit 64.
  • the charge amount comparison circuit 64 calculates the integrated charge amount Q1 supplied to the data line 46 when applying the reference image data D0 to the target pixel 42 from the current value detected by the current detection circuit 62 (S6). ).
  • a reference charge amount Q0 corresponding to the reference image data D0 is preset in the charge amount comparison circuit 64, and the charge amount comparison circuit 64 calculates a comparison result F from the calculated integrated charge amount Q1 and the reference charge amount Q0. (S8) and input to the image data correction circuit 66.
  • Q0 ( ⁇ * S / L0) * D0
  • Q1 ( ⁇ * S / L1) * D0
  • F Q1 / Q0
  • the image data correction circuit 66 inputs the generated compensated image data H to the image data generation circuit 60 (S12).
  • the image data generation circuit 60 generates the image data V using the compensation image data H in place of the display image data D input in advance. That is, in the present embodiment, the variation in the charge amount from the reference charge amount Q0 to the accumulated charge amount Q1 caused by the variation in the cell thickness L is corrected by changing the display image data D to the compensation image data H. Compensation.
  • the reference image data D0 is corrected to generate the reference compensation image data H0, and the compensation image data H is generated using the reference compensation image data H0.
  • the compensation image data is generated from the reference compensation image data H0 using the resistance group used to generate the display image data D from the reference image data D0. H can be generated, and the compensation image data H can be easily generated.
  • the display device 10 of the present embodiment is different from the display device 10 of the first embodiment in that the integrated charge amount Q1 is not calculated for all the picture elements 42 included in the liquid crystal panel 20 in the image data correction process.
  • the cell thickness L of the liquid crystal panel 20 may vary symmetrically in the left and right and up and down directions of the liquid crystal panel 20 with the central portion of the display region 22 as a boundary. Further, when the cell thickness L of the liquid crystal panel 20 varies, the cell thickness L may vary linearly from the end to the center of the display region 22. In the present embodiment, when the cell thickness L of the liquid crystal panel 20 varies linearly from the end to the center of the display area 22, the compensation image data H is obtained using the fact that the cell thickness L varies linearly. calculate.
  • the compensation image data HB is generated by the same method as in the first embodiment.
  • the compensation image data HC at the point C in the line segment AB is generated using the compensation image data HA and the compensation image data HB.
  • the distance between point A and point C is W (AC).
  • the distance between point B and point C is W (BC).
  • the compensation image data HB is the same over the entire circumference of the liquid crystal panel 20. Therefore, the compensation image data H can be generated for all the picture elements 42 of the liquid crystal panel 20 by using the compensation image data HA and the compensation image data HB.
  • the compensated image data HB is equal to the display image data D, and therefore it is necessary to obtain the compensated image data HB. Absent.
  • a third embodiment of the present invention will be described with reference to FIG.
  • the display device 10 of the present embodiment is different from that of the second embodiment in that the cell thickness L of the liquid crystal panel 20 is not linear from the end to the center of the display region 22 but varies along the prescribed curve Z. Different from the display device 10.
  • the liquid crystal panel 20 may be deformed along a certain suspension curve due to drooping due to the weight of the glass substrates 40A and 40B, and as shown in FIG.
  • the cell thickness L of the liquid crystal panel 20 may fluctuate along a certain prescribed curve Z.
  • the specified curve Z is stored in the source driver 28, and specifically, data indicating the specified curve Z is stored for each pixel 42 of the liquid crystal panel 20.
  • the compensation image data HC at the point C on the line segment AB is calculated using the prescribed curve Z, the compensation image data HA, and the compensation image data HB.
  • the prescribed curve Z, the compensation image data HA, and Compensation image data HC at point C on line segment AB is generated from compensation image data HB.
  • Embodiment 4 of the present invention will be described with reference to FIG.
  • the selected picture element in the image data correction process, the selected picture element is selected for each specified distance K in the first direction DL1 along the gate line 44 of the liquid crystal panel 20 and in the second direction DL2 along the data line 46. 42S is designated.
  • the integrated charge amount Q1 is calculated only for the selected picture element 42S, and the integrated charge amount Q1 is not calculated for the non-selected picture element 42N that is another picture element 42. 1 different from the display device 10 of FIG.
  • the cell thickness L of the liquid crystal panel 20 varies, a local variation of the cell thickness L may occur in a part of the liquid crystal panel 20, and the cell thickness L does not vary symmetrically in the left-right and vertical directions of the liquid crystal panel 20.
  • the compensation image data HS of the selected picture element 42S designated for each specified distance K appropriate compensation image data H can be obtained even when the cell thickness L of the liquid crystal panel 20 varies locally.
  • the compensated image data HS in the selected picture element 42S of the liquid crystal panel 20 is obtained by the same method as in the first embodiment.
  • the selected picture element 42S adjacent to the non-selected picture element 42N in FIG. 9, four selected pictures.
  • Element 42S is selected, and the compensation image data HN of the non-selected picture element 42N is calculated using the compensation picture data HS of the selected picture element 42S.
  • the compensation image data HN of the non-selected picture element 42N is calculated from the compensation image data HS of the selected picture element 42S. Even when the cell thickness L of the liquid crystal panel 20 varies locally, the cell thickness L varies continuously when considering each part of the liquid crystal panel 20. Therefore, when the selected picture element 42S is arranged at the specified distance K in the first direction DL1 and the second direction DL2 of the liquid crystal panel 20, the cell thickness of the non-selected picture element 42N is the cell of the adjacent selected picture element 42S. The value approximates the thickness L.
  • the compensation image data HN of the non-selected picture element 42N becomes a value approximate to the compensation image data HS of the selected picture element 42S. Therefore, when calculating the compensation image data HN, it is not necessary to calculate the accumulated charge amount Q1 for the non-selected picture element 42N, and the compensation image data HN can be easily calculated.
  • the embodiment of the present invention is not limited to this.
  • the image data correction process may be executed every fixed usage period of the display device 10.
  • the light source using the LED as the light source is exemplified, but a light source other than the LED may be used.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

Un traitement pour cette correction de défaut de planéité de dispositif d'affichage pour un panneau à cristaux liquides comprend les étapes suivantes consistant à : (1) appliquer des données d'image de référence (D0) au panneau à cristaux liquides et faire en sorte que le panneau à cristaux liquides affiche la même image (S2) ; (2) calculer une quantité de charge intégrée (Q1) en intégrant les valeurs courantes fournies au panneau à cristaux liquides lorsque les données d'image de référence (D0) sont appliquées (S6) ; (3) comparer la quantité de charge intégrée (Q1) avec une quantité de charge de référence (Q0) et générer des données de correction d'image (H) pour corriger des variations dans l'épaisseur des cellules (L) pour le panneau à cristaux liquides (S8, S10). Dans ce traitement, les caractéristiques du panneau à cristaux liquides peuvent être maintenues à un niveau élevé en corrigeant les variations dans l'épaisseur (L) des cellules du panneau à cristaux liquides à l'aide des données de correction d'image (H).
PCT/JP2012/068949 2011-08-03 2012-07-26 Procédé de correction de défaut de planéité de panneau d'affichage, circuit de commande et dispositif d'affichage WO2013018647A1 (fr)

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JP2011169996 2011-08-03

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06281914A (ja) * 1992-01-27 1994-10-07 Matsushita Electric Ind Co Ltd 液晶駆動回路と表示装置
JPH06347759A (ja) * 1992-12-25 1994-12-22 Canon Inc 液晶表示装置
JPH09218391A (ja) * 1996-02-09 1997-08-19 Sony Corp 強誘電性液晶駆動装置およびその駆動方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06281914A (ja) * 1992-01-27 1994-10-07 Matsushita Electric Ind Co Ltd 液晶駆動回路と表示装置
JPH06347759A (ja) * 1992-12-25 1994-12-22 Canon Inc 液晶表示装置
JPH09218391A (ja) * 1996-02-09 1997-08-19 Sony Corp 強誘電性液晶駆動装置およびその駆動方法

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