WO2013051490A1 - Circuit de commande d'affichage, dispositif d'affichage à cristaux liquides comprenant un circuit de commande d'affichage, et procédé de commande d'affichage - Google Patents

Circuit de commande d'affichage, dispositif d'affichage à cristaux liquides comprenant un circuit de commande d'affichage, et procédé de commande d'affichage Download PDF

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Publication number
WO2013051490A1
WO2013051490A1 PCT/JP2012/075311 JP2012075311W WO2013051490A1 WO 2013051490 A1 WO2013051490 A1 WO 2013051490A1 JP 2012075311 W JP2012075311 W JP 2012075311W WO 2013051490 A1 WO2013051490 A1 WO 2013051490A1
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Prior art keywords
gradation value
gradation
value
current frame
combination
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PCT/JP2012/075311
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English (en)
Japanese (ja)
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衛 大橋
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シャープ株式会社
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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
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
    • 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
    • G09G2320/0252—Improving the response speed
    • 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
    • G09G2340/00—Aspects of display data processing
    • G09G2340/16—Determination of a pixel data signal depending on the signal applied in the previous frame

Definitions

  • the present invention relates to a display control circuit for controlling display on a liquid crystal display panel based on an image signal given from the outside, a liquid crystal display device including the display control circuit, and a display control method.
  • the present invention relates to a display control circuit for performing overdrive driving that emphasizes a temporal change of a signal, a liquid crystal display device including the display control circuit, and a display control method.
  • the overdrive drive is a gradation voltage higher than the gradation voltage corresponding to the input image signal of the current frame or the input of the current frame according to the combination of the input image signal of the previous frame and the input image signal of the current frame.
  • a gradation voltage lower than the gradation voltage corresponding to the image signal is supplied to the liquid crystal display panel.
  • a gradation value corresponding to an input image signal one frame before (hereinafter referred to as “previous frame gradation value”) and a gradation value corresponding to an input image signal of the current frame (hereinafter referred to as “following frame gradation value”)
  • previous frame gradation value a gradation value corresponding to an input image signal of the current frame
  • following frame gradation value a gradation value corresponding to an input image signal of the current frame
  • write gradation voltage the gradation voltage to be supplied to the liquid crystal display panel
  • a table (hereinafter referred to as “OS table”) is held.
  • FIG. 15 is a diagram schematically showing an example of an OS table held in a conventional liquid crystal display device. Here, 256 gradation display is performed. In FIG.
  • the numerical value indicated in the leftmost column indicates the previous frame gradation value
  • the numerical value indicated in the uppermost line indicates the current frame gradation value.
  • the numerical value written at the position where each row intersects with each column corresponds to the writing gradation voltage determined based on the combination of each previous frame gradation value and each current frame gradation value.
  • a gradation value (hereinafter referred to as “writing gradation value”) is shown. For example, when the previous frame gradation value is “64” and the current frame gradation value is “128”, the writing gradation value is “166”. For example, when the previous frame gradation value is “160” and the current frame gradation value is “64”, the writing gradation value is “4”.
  • the writing gradation voltage higher than the gradation voltage corresponding to the current frame gradation value or the gradation voltage corresponding to the current frame gradation value is applied to the liquid crystal.
  • Patent Document 1 prepares a plurality of types of OS tables and responds to the difference in gradation value between two consecutive frames in 3D display.
  • the OS table to be used is selected, and the writing gradation value is determined based on the selected OS table. Thereby, the image quality in 3D display can be improved.
  • the OS table includes the number of gradations ⁇ the number of gradations (for example, 256 gradations ⁇ 256 gradations in the case of 256 gradation display). Minute data is not stored, and data smaller than this, for example, data of 16 gradations ⁇ 16 gradations is stored. For this reason, the combination of the previous frame gradation value and the current frame gradation value may not exist in the OS table. In such a case, conventionally, by using a combination of the previous frame gradation value and the current frame gradation value existing in the OS table, interpolation based on the gradation value (typically linear interpolation) is performed. The writing gradation value was determined.
  • an object of the present invention is to provide a display control circuit that enables high-quality moving image display at low cost, a liquid crystal display device including the display control circuit, and a display control method.
  • a first aspect of the present invention is a display control circuit for controlling display on a liquid crystal display panel based on an image signal given from the outside,
  • a writing gradation value used for correction for emphasizing a temporal change of the signal with respect to the image signal is given in the previous frame gradation value which is a gradation value in a frame immediately before the current frame, and in the current frame.
  • a storage unit storing a first look-up table for determination based on a combination of current frame gradation values which are gradation values of the image signal; The first look-up table is referred to, and when the combination exists in the first look-up table, the writing gradation value determined based on the combination is output, and the combination is the first look-up table.
  • the previous frame tone value and / or the current frame tone value corresponding to the combination closest to the combination and present in the first lookup table And a first gradation selection unit that outputs at least the write gradation value;
  • the previous frame gradation value and / or the current frame gradation value and the writing gradation value output from the first gradation selection unit Are converted into voltage values, and interpolation processing for obtaining the writing gradation values corresponding to the combinations not existing in the first look-up table is performed using the voltage values. And an interpolation unit.
  • the interpolation process performed by the first interpolation unit is a linear interpolation process.
  • the first gradation selection unit is closest to the previous frame gradation value when only the previous frame gradation value is not present in the first lookup table in the combination, and
  • the previous frame gradation value existing in the first look-up table and the writing gradation value determined based on a combination of the previous frame gradation value and the current frame gradation value are output. It is characterized by that.
  • the first gradation selection unit is closest to the current frame gradation value, and And outputting the current frame gradation value existing in the first look-up table and the writing gradation value determined based on a combination of the current frame gradation value and the previous frame gradation value. It is characterized by that.
  • the first gradation selection unit When the previous frame gradation value and the current frame gradation value constituting the combination do not exist in the first lookup table, the first gradation selection unit The previous frame tone value, the current frame tone value, the previous frame tone value, and the current frame that are closest to the current frame tone value and exist in the first lookup table. The writing gradation value determined based on a combination of gradation values is output.
  • the previous frame gradation value is the current frame gradation value in a frame immediately before the current frame.
  • the storage unit further includes a second lookup table for determining a reached gradation value, which is a gradation value predicted to be reached in the display on the liquid crystal display panel, based on the combination,
  • a reached gradation value which is a gradation value predicted to be reached in the display on the liquid crystal display panel
  • the reached gradation value obtained by performing interpolation processing in a predetermined format for acquiring the reached gradation value corresponding to the combination that does not exist in the second lookup table is immediately after the current frame.
  • a second interpolating unit for setting the previous frame gradation value in the previous frame.
  • the second interpolation unit converts each of the previous frame tone value and / or the current frame tone value and the reached tone value output from the second selection unit into a voltage value, and The interpolation process for acquiring the reached gradation value corresponding to the combination that does not exist in the second look-up table is performed using a voltage value.
  • a ninth aspect of the present invention is the eighth aspect of the present invention,
  • the interpolation process performed by the second interpolation unit is a linear interpolation process.
  • the second gradation selection unit is closest to the previous frame gradation value, and Outputting the previous frame gradation value existing in the second look-up table and the reached gradation value determined based on a combination of the previous frame gradation value and the current frame gradation value. It is characterized by.
  • An eleventh aspect of the present invention is the ninth aspect of the present invention, When only the current frame tone value does not exist in the second look-up table in the combination, the second tone selecting unit is closest to the current frame tone value, and Outputting the current frame gradation value existing in the second look-up table and the reached gradation value determined based on a combination of the current frame gradation value and the previous frame gradation value. It is characterized by.
  • a twelfth aspect of the present invention is the ninth aspect of the present invention,
  • the second gradation selection unit when the previous frame gradation value and the current frame gradation value constituting the combination do not exist in the second lookup table,
  • the reached gradation value determined based on a combination of gradation values is output.
  • a thirteenth aspect of the present invention is a liquid crystal display device, A display control circuit according to any of the first to twelfth aspects of the present invention; And a liquid crystal display panel for performing display based on the writing gradation value obtained by the display control circuit.
  • a fourteenth aspect of the present invention is a display control method for controlling display on a liquid crystal display panel based on an image signal given from the outside, A writing gradation value used for correction for emphasizing a temporal change of the signal with respect to the image signal is given in the previous frame gradation value which is a gradation value in a frame immediately before the current frame, and in the current frame.
  • a first lookup table for determining based on a combination of current frame tone values that are tone values of the image signal; Outputting the writing gradation value determined based on the first combination when the combination exists in the first lookup table; If the combination does not exist in the first lookup table, the previous frame tone value and / or the current value that is closest to the combination and that corresponds to the combination that exists in the first lookup table.
  • the first interpolation unit when there is no combination in the first look-up table, performs the writing gradation value, the previous frame gradation value, and the current frame gradation value. Are converted into voltage values, and interpolation processing is performed to acquire writing gradation values corresponding to combinations that do not exist in the first lookup table using the voltage values. Since the response speed of the liquid crystal depends on the voltage value (that is, the gradation voltage), the interpolation process using the gradation voltage is performed according to the VT characteristic of the liquid crystal when no combination exists in the first lookup table. Overdrive driving (driving for correcting the temporal change of the signal with respect to the image signal) can be performed using the gradation voltage. Therefore, a more appropriate liquid crystal response speed can be obtained as compared with the conventional technique in which overdrive driving is performed using the first look-up table having a relatively small memory capacity. Thereby, high-quality moving image display can be performed at low cost.
  • the linear interpolation process is used as the interpolation process in the first interpolation unit, so that the same effect as that of the first aspect of the present invention can be achieved with a simple process.
  • the third aspect of the present invention when only the previous frame gradation value does not exist in the first look-up table among the combinations, the first frame closest to the previous frame gradation value and the first By using the previous frame gradation value existing in the look-up table and the writing gradation value determined based on the combination of the previous frame gradation value and the current frame gradation value, The same effects as in the above aspect can be obtained.
  • the fourth aspect of the present invention when only the current frame gradation value does not exist in the first lookup table among the combinations, the value is closest to the current frame gradation value, and the first By using the current frame gradation value existing in the lookup table and the writing gradation value determined based on the combination of the current frame gradation value and the previous frame gradation value, The same effects as in the above aspect can be obtained.
  • the previous frame gradation value and the current frame gradation value forming the combination are not present in the first lookup table
  • the previous frame gradation value and the current frame gradation value are determined. Based on the combination of the previous frame tone value and the current frame tone value, and the previous frame tone value and the current frame tone value that are closest to the tone value and exist in the first lookup table.
  • the same effect as in the first aspect of the present invention can be obtained by using the current frame gradation value in the frame immediately before the current frame as the previous frame gradation value. it can.
  • the reached gradation value obtained by using the second lookup table in the previous frame is referred to as the previous frame gradation value in the current frame. Used. For this reason, it is possible to perform overdrive driving using a more accurate previous frame gradation value. As a result, the response speed of the liquid crystal is corrected more appropriately, so that the image quality of moving image display can be further improved.
  • the interpolation process when the combination does not exist in the second lookup table is performed by using the voltage value (that is, the gradation voltage). For this reason, the interpolation process is performed in consideration of the VT characteristics of the liquid crystal, so that a more accurate reached gradation value can be obtained. Since the reached gradation value obtained in this way is used for overdrive driving as the previous frame gradation value, the response speed of the liquid crystal is corrected more appropriately. Thereby, the image quality of moving image display can be further improved.
  • the voltage value that is, the gradation voltage
  • the linear interpolation process is used as the interpolation process in the second interpolation processing unit, so that the same effects as those of the eighth aspect of the present invention can be achieved with a simple process.
  • the value is closest to the previous frame gradation value, and the second By using the input tone value existing in the look-up table and the reached tone value determined based on the combination of the previous frame tone value and the current frame tone value, The same effects as in the above aspect can be obtained.
  • the value is closest to the current frame gradation value, and the second By using the current frame tone value existing in the look-up table and the reached tone value determined based on the combination of the current frame tone value and the previous frame tone value, The same effect as the aspect can be achieved.
  • the previous frame gradation value and the current frame gradation value constituting the combination do not exist in the second lookup table
  • the previous frame gradation value and the current frame A combination of the previous frame gradation value and the current frame gradation value, and the combination of the previous frame gradation value and the current frame gradation value that is closest to the gradation value and exists in the second lookup table.
  • the liquid crystal display device can achieve the same effects as any of the first to twelfth aspects of the present invention.
  • the display control method can achieve the same effects as those of the first aspect of the present invention.
  • FIG. 1 is a block diagram illustrating an overall configuration of a liquid crystal display device according to a first embodiment of the present invention. It is a block diagram for demonstrating the function structure of the timing controller IC in the said 1st Embodiment. It is a block diagram for demonstrating the detailed functional structure of the overdrive drive part in the said 1st Embodiment. It is the figure which showed typically an example of the OS table in the said 1st Embodiment. It is the figure which showed typically a part of OS table (or prediction table) in order to demonstrate the interpolation process in the 1st case in the 1st or 2nd embodiment of this invention.
  • FIG. 6 is a diagram schematically showing gradation value-gradation voltage characteristics in order to explain how the error voltage is eliminated in the first case in the first embodiment. It is the figure which showed typically a part of OS table (or prediction table), in order to demonstrate the interpolation process in the 2nd case in the said 1st or 2nd embodiment.
  • FIG. 6 is a diagram schematically showing gradation value-gradation voltage characteristics in order to explain how the error voltage is eliminated in the second case in the first embodiment. It is the figure which showed typically a part of OS table (or prediction table), in order to demonstrate the interpolation process in the 3rd case in the said 1st or 2nd embodiment.
  • FIG. 10 is a diagram schematically showing gradation value-gradation voltage characteristics in order to explain how the error voltage is eliminated in the third case in the first embodiment. It is a block diagram for demonstrating the detailed functional structure of the overdrive drive part in the said 2nd Embodiment. It is the figure which showed typically an example of the prediction table in the said 2nd Embodiment. It is the figure which showed typically an example of the OS table in the said 2nd Embodiment. It is a block diagram for demonstrating the detailed functional structure of the overdrive drive part in the said 3rd Embodiment. It is the figure which showed typically an example of the OS table currently hold
  • FIG. 6 is a diagram schematically illustrating an example of an OS table in order to explain a case where a combination of a previous frame gradation value and a current frame gradation value does not exist in the OS table in the basic study of the present invention.
  • FIG. 6 is a diagram schematically showing gradation value-gradation voltage characteristics in order to explain a case where the combination of the previous frame gradation value and the current frame gradation value does not exist in the OS table in the basic study.
  • “close to the combination of the previous frame gradation value and the current frame gradation value” means that the value is close to the previous frame gradation value related to the combination, and the current frame gradation value related to the combination has a value. It means that the value is close or the value is close to the writing gradation value (or the reached gradation value) related to the combination.
  • FIG. 16 is a diagram schematically showing an example of the OS table in order to explain a case where the combination of the previous frame gradation value and the current frame gradation value does not exist in the OS table in this basic study.
  • the previous frame gradation value and the current frame gradation value used for referring to the OS table are Gxc and Gya, respectively, and the previous frame gradation value Gxc does not exist in the OS table.
  • the writing gradation value (Gca) corresponding to the combination of the previous frame gradation value Gxc and the current frame gradation value Gya is obtained by interpolation (typically linear interpolation). Desired. Specifically, the previous frame gradation value Gxa and Gxb in the vicinity of the previous frame gradation value Gxc, the writing gradation value Gaa corresponding to the combination of the previous frame gradation value Gxa and the current frame gradation value Gya, By performing linear interpolation on the write tone values Gaa and Gba using the write tone value Gba corresponding to the combination of the previous frame tone value Gxb and the current frame tone value Gya, the write tone value Gca Is required. The writing gradation value Gca thus obtained is converted into a writing gradation voltage and applied to the liquid crystal.
  • interpolation typically linear interpolation
  • FIG. 17 schematically shows the gradation value-gradation voltage characteristics in order to explain the case where the combination of the previous frame gradation value and the current frame gradation value does not exist in the OS table in this basic study.
  • FIG. This gradation value-gradation voltage characteristic is determined based on the VT characteristic of the liquid crystal as described above. As shown in FIG. 17, the gradation value and the gradation voltage are not in a linear relationship. More specifically, the change in the gradation voltage with respect to the change in the gradation value is large near the low gradation value and the vicinity of the high gradation value, and the change in the gradation voltage with respect to the change in the gradation value is extremely small near the middle gradation value.
  • the writing gradation value Gca obtained by linear interpolation is the center value of the writing gradation values Gaa and Gba.
  • the writing gradation voltage Vca corresponding to the writing gradation value Gca is equal to the writing gradation as shown in FIG. This is not the median value of the write gradation voltage Vaa corresponding to the value Gaa and the write gradation voltage Vba corresponding to the write gradation value Gba.
  • the gradation voltage Vba is higher than the intermediate value. The value is close to.
  • the response speed of the liquid crystal depends on the gradation voltage.
  • the writing gradation voltage Vaa corresponding to the writing gradation value Gaa and the writing are written. It is desirable to apply to the liquid crystal a writing gradation voltage (hereinafter referred to as “ideal writing voltage”, which is represented by the symbol Vid) corresponding to the center value of the writing gradation voltage Vba corresponding to the gradation value Gba. . Since the writing gradation voltage Vca shown in FIG. 17 is higher than the ideal writing voltage Vid, if the liquid crystal display panel is in the normally black mode, the writing gradation voltage Vca is applied to the liquid crystal. When applied, the display becomes brighter than expected.
  • the error voltage (“the writing gradation voltage corresponding to the writing gradation value obtained by linear interpolation based on the gradation value and the ideal writing voltage Vid” is applied to the writing gradation voltage to be applied to the liquid crystal. If a difference between the liquid crystal and the liquid crystal is generated, an appropriate liquid crystal response speed cannot be obtained. As a result, the conventional liquid crystal display device cannot sufficiently suppress deterioration in image quality when displaying moving images.
  • the first embodiment of the present invention relates to a liquid crystal display device that performs overdrive driving using an OS table.
  • FIG. 1 is a block diagram showing the overall configuration of the liquid crystal display device according to the present embodiment.
  • This liquid crystal display device includes a liquid crystal display panel 5 including a display unit 500, a control substrate 10, a source driver 300, and a gate driver 400.
  • a timing controller IC 100 as a display control circuit and a flash memory 200 as a nonvolatile memory are mounted.
  • both or one of the source driver 300 and the gate driver 400 may be included in the liquid crystal display panel 5. That is, both or one of the source driver 300 and the gate driver 400 may be monolithically formed on the glass substrate that constitutes the liquid crystal display panel 5.
  • two display modes of 2D display and 3D display are prepared, and the display unit 500 of the liquid crystal display panel 5 displays an image in 2D display or 3D display depending on the display mode. It is possible.
  • a display mode in which 2D display is to be performed is referred to as “2D mode”
  • a display mode in which 3D display is to be performed is referred to as “3D mode”. Note that it is not essential for the present invention to prepare two display modes of the 2D mode and the 3D mode, and only the 2D mode or only the 3D mode may be prepared.
  • the display unit 500 a plurality of source lines SL, a plurality of gate lines GL, and pixel forming portions provided corresponding to the intersections of the source lines SL and the gate lines GL are formed. That is, the display unit 500 includes a plurality of pixel formation units. The plurality of pixel forming portions are arranged in a matrix to form a pixel array.
  • Each pixel forming portion includes a thin film transistor 50 which is a switching element having a gate terminal connected to a gate line passing through a corresponding intersection and a source terminal connected to a source line passing through the intersection, and a drain terminal of the thin film transistor 50
  • a pixel electrode 51 connected to the common electrode 52, a common electrode 52 which is a common electrode provided in the plurality of pixel formation portions, and a common electrode 52 provided in the plurality of pixel formation portions.
  • the liquid crystal layer is sandwiched between the common electrode 52.
  • a pixel capacitor Cp is constituted by a liquid crystal capacitor formed by the pixel electrode 51 and the common electrode 52.
  • an auxiliary capacitor is provided in parallel with the liquid crystal capacitor in order to reliably hold the voltage in the pixel capacitor Cp.
  • the auxiliary capacitor is not directly related to the present invention, its description and illustration are omitted. Note that only the components corresponding to one pixel formation portion are shown in the display portion 500 of FIG.
  • the timing controller IC 100 receives an image signal DAT, a timing signal TS such as a horizontal synchronization signal and a vertical synchronization signal, and a mode signal MD indicating a display mode from the outside, and performs a predetermined correction process on the image signal DAT.
  • the digital video signal DV, the source start pulse signal SSP for controlling the operation of the source driver 300, the source clock signal SCK, and the latch strobe signal LS, the gate start pulse signal GSP for controlling the operation of the gate driver 400, and A gate clock signal GCK is output. Note that immediately after the power is turned on or when the display mode is switched, the timing controller IC 100 reads data necessary for the correction processing from the flash memory 200 and writes the read data to the internal volatile memory.
  • the source driver 300 receives the digital video signal DV, the source start pulse signal SSP, the source clock signal SCK, and the latch strobe signal LS output from the timing controller IC 100, and applies a driving video signal to each source line SL.
  • the source driver 300 sequentially holds the digital video signal DV indicating the voltage (write gradation value) to be applied to each source line SL at the timing when the pulse of the source clock signal SCK is generated.
  • the held digital video signal DV is converted into an analog voltage (write gradation voltage) at the timing when the pulse of the latch strobe signal LS is generated.
  • the converted analog voltage is simultaneously applied to all the source lines SL as a driving video signal.
  • the gate driver 400 repeats the application of the active scanning signal to each gate line GL with one frame period as a cycle based on the gate start pulse GSP and the gate clock signal GCK output from the timing controller IC100.
  • FIG. 2 is a block diagram for explaining a functional configuration of the timing controller IC 100 in the present embodiment.
  • the timing controller IC 100 includes a data reception unit 110, a data processing unit 120, a line buffer 130, a data transmission unit 140, a timing control unit 150, an SDRAM 160 as a storage unit, and an SDRAM interface unit 170.
  • the data processing unit 120 includes a gamma correction unit 121 and an overdrive drive unit 122.
  • the data receiving unit 110 receives an image signal DAT transmitted from the outside and gives it to the data processing unit 120.
  • the gamma correction unit 121 in the data processing unit 120 performs gamma correction according to the characteristics of the liquid crystal display panel 5 used. Since this gamma correction is well known to those skilled in the art, description thereof is omitted. Various known gamma corrections can be used as the gamma correction in the present embodiment.
  • the overdrive drive unit 122 in the data processing unit 120 performs correction for emphasizing the temporal change of the signal with respect to the image signal DAT on which gamma correction has been performed, and displays the writing gradation value in each pixel forming unit.
  • the gray level data WD is generated and output to the line buffer 130.
  • the overdrive drive unit 122 is given a mode signal MD indicating whether the display mode is the 2D mode or the 3D mode, and the overdrive drive unit 122 performs processing according to the display mode.
  • FIG. 3 is a block diagram for explaining a detailed configuration of the overdrive driving unit 122 in the present embodiment.
  • the overdrive driving unit 122 includes a writing tone selection unit 21 and a writing tone interpolation processing unit 22 as a first interpolation unit.
  • the writing gradation interpolation processing unit 22 includes a gradation value-voltage conversion unit 23, an interpolation calculation unit 24, and a voltage-gradation value conversion unit 25.
  • the writing gradation selection unit 21 inputs the current frame gradation value indicated by the input data (hereinafter referred to as “current frame data”) CD of the current frame to the writing gradation selection unit 21 and one frame before the current frame data.
  • the writing gradation value is determined by referring to the OS table LUT1 shown in FIG.
  • the gray scale data WD is output.
  • the OS table LUT1 corresponds to a first lookup table.
  • data for 16 gradations ⁇ 16 gradations is prepared in the OS table LUT1.
  • the numerical value indicated in the leftmost column indicates the previous frame gradation value
  • the numerical value indicated in the uppermost line indicates the current frame gradation value. Show.
  • a numerical value written at a position where each row and each column intersect indicates a writing gradation value determined based on a combination of each previous frame gradation value and each current frame gradation value.
  • the writing gradation selection unit 21 is at least the previous frame gradation value and / or the closest to the combination.
  • the current frame gradation value and the written gradation value are given to the gradation value-voltage conversion unit 23.
  • the gradation value-voltage conversion unit 23 converts each received gradation value into a voltage value and outputs it.
  • the interpolation calculation unit 24 uses the converted voltage value output from the gradation value-voltage conversion unit 23 to obtain a linear interpolation process for acquiring a writing gradation value corresponding to a combination that does not exist in the OS table LUT1.
  • the voltage value obtained by the interpolation process is output.
  • the voltage-gradation value conversion unit 25 converts the voltage value output from the interpolation calculation unit 24 into a gradation value (writing gradation value), and outputs writing gradation data WD indicating the converted gradation value.
  • the writing gradation data WD output from the writing gradation selection unit 21 is referred to as “first writing gradation data”, and is represented by a symbol WDa.
  • the writing gradation data WD output from the voltage-gradation value conversion unit 25 is referred to as “second writing gradation data” and is denoted by reference numeral WDb. Further, the writing gradation value indicated by the first writing gradation data WDa is referred to as “first writing gradation value”, and the writing gradation value indicated by the second writing gradation data WDb. This is called “second writing gradation value”.
  • the writing gradation data WD for one line output from the overdrive driving unit 122 is held.
  • the data transmission unit 140 takes out the write gradation data WD from the line buffer 130 and outputs it as a digital video signal DV.
  • the timing control unit 150 controls operations of the data reception unit 110, the data processing unit 120, and the data transmission unit 140 based on a timing signal TS transmitted from the outside, and also includes a source start pulse signal SSP, a source clock signal SCK, A latch strobe signal LS, a gate start pulse GSP, and a gate clock signal GCK are output.
  • SDRAM 160 is a volatile memory.
  • the SDRAM 160 stores data used for processing by the overdrive drive unit 122 (hereinafter referred to as “overdrive drive data”).
  • the overdrive driving data is composed of the previous frame data PD and the OS table LUT1.
  • the SDRAM interface unit 170 functions as an interface between the data processing unit 120 and the SDRAM 160 when writing data to the SDRAM 160 and reading data from the SDRAM 160.
  • the flash memory 200 is also mounted on the control board 10 on which the timing controller IC 100 is mounted.
  • the flash memory 200 stores at least an OS table LUT1 which is a part of overdrive driving data. Since the flash memory 200 is non-volatile, the contents of the OS table LUT1 will not be lost even when the power of the apparatus is turned off.
  • the timing controller IC 100 reads the OS table LUT1 from the flash memory 200 and writes it to the internal SDRAM 160 immediately after the device is turned on. Thus, by adopting a configuration in which the OS table LUT1 is written in the flash memory 200 instead of the timing controller IC 100, the contents of the OS table LUT1 can be rewritten from the outside relatively easily.
  • the overdrive drive unit 122 actually performs an operation according to the display mode, such as changing an OS table to be referred to according to the display mode, but the operation unique to the present invention is performed in the 2D mode and the 3D mode. It is common. For this reason, the operation described below is performed in, for example, the 3D mode, and the operation description for each display mode is omitted.
  • the writing gradation selection unit 21 receives the current frame data CD, and further reads the previous frame data PD stored in the SDRAM 160.
  • the current frame data CD received by the writing gradation selection unit 21 is stored in the SDRAM 160 as the previous frame data PD in the frame next to the current frame.
  • the writing gradation selection unit 21 refers to the OS table LUT1 stored in the SDRAM 160 based on the previous frame gradation value indicated by the previous frame data PD and the current frame gradation value indicated by the current frame data CD.
  • the combination of the previous frame gradation value and the current frame gradation value exists in the OS table LUT1 (hereinafter sometimes simply referred to as “there is a combination”) and does not exist (hereinafter referred to as “there is a combination”).
  • the operations are different from each other simply by “when there is no combination”.
  • the operation when a combination exists is performed as follows.
  • the write tone selection unit 21 acquires from the SDRAM 160 first write tone data WDa indicating the first write tone value corresponding to the combination of the previous frame tone value and the current frame tone value. . Then, the write gradation selection unit 21 gives the first write gradation data WDa to the line buffer 130. As described above, when the combination exists, the above-described linear interpolation processing is not performed.
  • the operation when there is no combination is specifically divided into three types of operations. That is, the operation when the previous frame gradation value does not exist and the current frame gradation value exists in the OS table LUT1 (prediction table LUT2 in the third embodiment described later) (hereinafter referred to as “first case”).
  • the operation when the previous frame gradation value exists in the OS table LUT1 and the current frame gradation value does not exist hereinafter referred to as “second case”
  • the previous frame gradation value There are three types when both of them are not present (hereinafter referred to as “third case”).
  • third case There are three types when both of them are not present. In the following, the operation when there is no combination will be described separately for the operation of the first case, the operation of the second case, and the operation of the third case.
  • FIG. 5 is a diagram schematically showing a part of the OS table LUT1 in order to explain the operation of the first case in the present embodiment.
  • a gradation value is indicated by a code whose initial is “G”
  • a gradation voltage is indicated by a code whose initial is “V”.
  • the gradation voltage indicated in parentheses on the right side or the lower side of the gradation value is a gradation voltage obtained by converting the gradation value into a voltage value for convenience of explanation.
  • the voltage does not exist in the OS table LUT1 (the same applies to FIGS. 7 and 9 described later). As shown in FIG.
  • the first frame gradation value used for referring to the OS table LUT1 is Gxc that does not exist in the OS table LUT1, and the current frame gradation value is Gya that exists in the OS table LUT1.
  • the previous frame gradation value Gxc is larger than the previous frame gradation value Gxa and smaller than Gxb.
  • the writing gradation selection unit 21 exists in the OS table LUT1
  • the previous frame gradation value Gxa having a value smaller than the previous frame gradation value Gxc and the current frame level existing in the OS table LUT1
  • the write tone value Gaa corresponding to the combination with the tone value Gya is acquired from the SDRAM 160.
  • the write tone selection unit 21 is present in the OS table LUT1 and is more than the previous frame tone value Gxc of the two previous frame tone values closest to the previous frame tone value Gxc.
  • the write gradation value Gba corresponding to the combination of the previous frame gradation value Gxb having a large value and the current frame gradation value Gya existing in the OS table LUT1 is acquired from the SDRAM 160.
  • the writing gradation selection unit 21 acquires the previous frame gradation values Gxa and Gxb from the SDRAM 160 in addition to the writing gradation values Gaa and Gba acquired as described above. Then, the write tone selection unit 21 writes the write tone values Gaa and Gba and the previous frame tone values Gxa and Gxb acquired from the SDRAM 160, and the previous frame tone value Gxc that does not exist in the OS table LUT1. This is given to the gradation value-voltage conversion unit 23 in the gradation interpolation processing unit 22.
  • the gradation value-voltage conversion unit 23 converts the writing gradation values Gaa, Gba and the previous frame gradation values Gxa, Gxb, Gxc received from the writing gradation selection unit 21 into voltage values and outputs them. .
  • the gradation voltages obtained by converting the writing gradation values Gaa and Gba and the previous frame gradation values Gxa, Gxb, and Gxc received from the writing gradation selection unit 21 into voltage values are Vaa. , Vba, Vxa, Vxb, and Vxc.
  • the gradation voltage obtained by converting the previous frame gradation value into the voltage value is referred to as “previous frame gradation voltage”.
  • the interpolation calculation unit 24 receives the writing gradation voltages Vaa and Vba and the previous frame gradation voltages Vxa, Vxb, and Vxc from the gradation value-voltage conversion unit 23, and performs the writing step by linear interpolation processing using them.
  • a regulated voltage Vvca is generated and output.
  • the linear interpolation processing in the first case is performed based on the following equation (1).
  • Vvca Vaa + (Vba ⁇ Vaa) ⁇ (Vxc ⁇ Vxa) / (Vxb ⁇ Vxa) ... (1)
  • the voltage-gradation value conversion unit 25 receives the write gradation voltage Vvca from the interpolation calculation unit 24, converts it into a gradation value (second writing gradation value), and outputs the second writing step. Second write gradation data WDb indicating a tone value is applied to the line buffer 130. As described above, the operation of the first case in the overdrive drive unit 122 is performed.
  • FIG. 6 is a diagram schematically showing gradation value-gradation voltage characteristics in order to explain the operation of the first case in the present embodiment.
  • the conventional liquid crystal display device performs linear interpolation processing using the writing gradation values Gaa and Gba and the previous frame gradation values Gxa, Gxb, and Gxc, and performs the linear interpolation.
  • the writing gradation value Gca obtained by the interpolation processing is converted into the writing gradation voltage Vgca by the source driver 300 and applied to the liquid crystal.
  • the writing gradation voltage Vgca obtained by the linear interpolation processing based on the gradation value in the conventional liquid crystal display device does not become the above-described ideal writing voltage Vid. For this reason, in the conventional liquid crystal display device, an error voltage is generated in the first case.
  • the liquid crystal display device according to the present embodiment has a writing scale obtained by converting the writing gradation values Gaa and Gba and the previous frame gradation values Gxa, Gxb and Gxc into voltage values, respectively.
  • the linear interpolation processing based on the above equation (1) is performed using the adjustment voltages Vaa, Vba and the previous frame gradation voltages Vxa, Vxb, Vxc, and the writing gradation voltage Vvca obtained by the linear interpolation processing is gradation
  • the gradation value is converted again into the writing gradation voltage Vvca in the source driver 300 and applied to the liquid crystal.
  • the write gradation voltage Vvca obtained by the linear interpolation process is a value corresponding to the ideal write voltage Vid described above.
  • FIG. 7 is a diagram schematically showing a part of the OS table LUT1 in order to explain the operation of the second case in the present embodiment.
  • the OS table LUT1 there are written data corresponding to combinations of the previous frame gradation value Gxa, the current frame gradation values Gya and Gyb, and the previous frame gradation value Gxa and the current frame gradation value Gya.
  • the previous frame gradation value used for referring to the OS table LUT1 is Gxa existing in the OS table LUT1
  • the current frame gradation value is Gyc not existing in the OS table LUT1.
  • the operation will be described.
  • the current frame gradation value Gyc is larger than the current frame gradation value Gya and smaller than Gyb.
  • the writing gradation selection unit 21 performs the previous frame existing in the OS table LUT1.
  • the current frame whose value is smaller than the current frame tone value Gyc among the two current frame tone values that are present in the OS table LUT1 and closest to the current frame tone value Gyc.
  • the write gradation value Gaa corresponding to the combination with the gradation value Gya is acquired from the SDRAM 160.
  • a write tone value Gab corresponding to a combination with the current frame tone value Gyb having a value larger than the current frame tone value Gyc among the tone values is acquired from the SDRAM 160.
  • the writing gradation selection unit 21 acquires the current frame gradation values Gya and Gyb corresponding to them from the SDRAM 160 in addition to the writing gradation values Gaa and Gab acquired as described above. Then, the writing gradation selection unit 21 writes the writing gradation values Gaa and Gab and the current frame gradation values Gya and Gyb acquired from the SDRAM 160 and the current frame gradation value Gyc that does not exist in the OS table LUT1. This is given to the gradation value-voltage conversion unit 23 in the gradation interpolation processing unit 22.
  • the gradation value-voltage conversion unit 23 converts the writing gradation values Gaa, Gab and the current frame gradation values Gya, Gyb, Gyc received from the writing gradation selection unit 21 into voltage values and outputs them. .
  • the gradation voltages obtained by converting the writing gradation values Gaa, Gab and the current frame gradation values Gya, Gyb, Gyc received from the writing gradation selection unit 21 into voltage values are Vaa. , Vab, Vya, Vyb, and Vyc.
  • a gradation voltage obtained by converting a current frame gradation value into a voltage value is referred to as a “current frame gradation voltage”.
  • the interpolation calculation unit 24 receives the write gradation voltages Vaa and Vab and the current frame gradation voltages Vya, Vyb, and Vyc from the gradation value-voltage conversion unit 23, and performs a write step by linear interpolation processing using them.
  • a regulated voltage Vvac is generated and output.
  • the linear interpolation processing in the first case is performed based on the following equation (2).
  • Vvac Vaa + (Vab ⁇ Vaa) ⁇ (Vyc ⁇ Vya) / (Vyb ⁇ Vya) ...
  • the voltage-gradation value conversion unit 25 receives the writing gradation voltage Vvac from the interpolation calculation unit 24, converts it into a gradation value (second writing gradation value), and outputs the second writing step. Second write gradation data WDb indicating a tone value is applied to the line buffer 130. As described above, the operation of the second case in the overdrive drive unit 122 is performed.
  • FIG. 8 is a diagram schematically showing the gradation value-gradation voltage characteristics for explaining the operation of the second case in the present embodiment.
  • the conventional liquid crystal display device performs linear interpolation processing using the write tone values Gaa, Gab and the current frame tone values Gya, Gyb, Gyc,
  • the writing gradation value Gac obtained by the interpolation processing is converted into the writing gradation voltage Vgac by the source driver 300 and applied to the liquid crystal. Since the response speed of the liquid crystal depends on the gradation voltage, the writing gradation voltage Vgac obtained by the linear interpolation processing based on the gradation value in the conventional liquid crystal display device does not become the above-described ideal writing voltage Vid.
  • the liquid crystal display device has a writing scale obtained by converting the writing gradation values Gaa, Gab and the current frame gradation values Gya, Gyb, Gyc into voltage values.
  • the linear interpolation processing based on the above equation (2) is performed using the adjustment voltages Vaa, Vab and the current frame gradation voltages Vya, Vyb, Vyc, and the writing gradation voltage Vvac obtained by the linear interpolation processing is converted into gradation.
  • the tone value is converted again into the writing tone voltage Vvac in the source driver 300 and applied to the liquid crystal. In this way, since the linear interpolation process in the present embodiment is performed based on the voltage value, the write gradation voltage Vvac obtained by the linear interpolation process becomes a value corresponding to the ideal write voltage Vid described above.
  • FIG. 9 is a diagram schematically showing a part of the OS table LUT1 in order to explain the operation of the third case in the present embodiment.
  • the OS table LUT1 corresponds to combinations of previous frame gradation values Gxa and Gxb, current frame gradation values Gya and Gyb, previous frame gradation values Gxa, and current frame gradation values Gya.
  • the gradation value Gab corresponding to the combination of the previous frame gradation value Gxa and the current frame gradation value Gyb, and the previous frame gradation value Gxb and the current frame gradation value Gya
  • a writing gradation value Gba to be performed and a writing gradation value Gbb corresponding to a combination of the previous frame gradation value Gxb and the current frame gradation value Gyb.
  • the previous frame gradation value Gxa is smaller than Gxb
  • the current frame gradation value Gya is smaller than Gyb
  • the writing gradation value Gaa is smaller than Gab and Gba
  • the writing gradation value Gbb is smaller than Gab and Gba.
  • the previous frame gradation value used for referring to the OS table LUT1 is Gxc that does not exist in the OS table LUT1
  • the current frame gradation value is Gyc that does not exist in the OS table LUT1.
  • the previous frame gradation value Gxc is larger than the previous frame gradation value Gxa and smaller than Gxb
  • the current frame gradation value Gyc is larger than the current frame gradation value Gya and smaller than Gyb.
  • the writing gradation selection unit 21 exists in the OS table LUT1
  • the previous frame gradation value Gxa which is smaller than the previous frame gradation value Gxc, of the two previous frame gradation values closest to the previous frame gradation value Gxc, and exists in the OS table LUT1
  • the value Gaa is obtained from the SDRAM 160.
  • the write tone selection unit 21 is present in the OS table LUT1 and is more than the previous frame tone value Gxc of the two previous frame tone values closest to the previous frame tone value Gxc.
  • the previous frame tone value Gxa having a smaller value and the current frame tone value Gyc of the two current frame tone values closest to the current frame tone value Gyc that are present in the OS table LUT1 The write gradation value Gab corresponding to the combination with the current frame gradation value Gyb having a large value is acquired from the SDRAM 160.
  • the write tone selection unit 21 is present in the OS table LUT1 and is more than the previous frame tone value Gxc of the two previous frame tone values closest to the previous frame tone value Gxc.
  • the previous frame tone value Gxb having a large value and the current frame tone value Gyc of the two current frame tone values closest to the current frame tone value Gyc that are present in the OS table LUT1 The write gradation value Gba corresponding to the combination with the current frame gradation value Gya having a small value is acquired from the SDRAM 160.
  • the write tone selection unit 21 is present in the OS table LUT1 and is more than the previous frame tone value Gxc of the two previous frame tone values closest to the previous frame tone value Gxc.
  • the previous frame tone value Gxb having a large value and the current frame tone value Gyc of the two current frame tone values closest to the current frame tone value Gyc that are present in the OS table LUT1 The write gradation value Gbb corresponding to the combination with the current frame gradation value Gyb having a large value is acquired from the SDRAM 160.
  • the writing tone selection unit 21 adds the previous frame tone values Gxa, Gxb, and the current frame tone values corresponding thereto. Gya and Gyb are acquired from the SDRAM 160. Then, the writing gradation selection unit 21 writes the writing gradation values Gaa, Gab, Gba, Gbb, the previous frame gradation values Gxa, Gxb, the current frame gradation values Gya, Gyb acquired from the SDRAM 160, and the OS table. The previous frame gradation value Gxc and the current frame gradation value Gyc that do not exist in the LUT 1 are supplied to the gradation value-voltage conversion unit 23 in the writing gradation interpolation processing unit 22.
  • the gradation value-voltage conversion unit 23 receives the writing gradation values Gaa, Gab, Gba, Gbb, the previous frame gradation values Gxa, Gxb, Gxc, and the current frame gradation value received from the writing gradation selection unit 21.
  • Each of Gya, Gyb, and Gyc is converted into a voltage value and output.
  • the write tone values Gaa, Gab, Gba, Gbb, the previous frame tone values Gxa, Gxb, Gxc, and the current frame tone values Gya, Gyb, Gyc received from the write tone selecting unit 21 are obtained.
  • the gradation voltages obtained by converting into voltage values are indicated by Vaa, Vab, Vba, Vbb, Vxa, Vxb, Vxc, Vya, Vyb, and Vyc, respectively.
  • the interpolation calculation unit 24 receives the write gradation voltages Vaa, Vab, Vba, Vbb, the previous frame gradation voltages Vxa, Vxb, Vxc, and the current frame gradation voltages Vya, Vyb, Vyc from the gradation value-voltage conversion unit 23. , And generates and outputs a write gradation voltage Vvc by linear interpolation processing using them.
  • a pattern for generating a write gradation voltage Vvc using a write gradation voltage Vvca and a write gradation voltage Vvcb described later and a write gradation
  • the interpolation calculation unit 24 generates the write gradation voltage Vvca based on the above equation (1), and The write gradation voltage Vvcb is generated based on the following equation (3).
  • Vvcb Vab + (Vbb ⁇ Vab) ⁇ (Vxc ⁇ Vxa) / (Vxb ⁇ Vxa) ... (3)
  • the interpolation calculation unit 24 uses the writing gradation voltages Vvca and Vvcb generated based on the expressions (1) and (3), respectively, to write the writing gradation based on the following expression (4).
  • Vvc Vvca + (Vvcb ⁇ Vvca) ⁇ (Vyc ⁇ Vya) / (Vyb ⁇ Vya) (4)
  • the interpolation calculation unit 24 generates the write gradation voltage Vvac based on the above equation (2).
  • the write gradation voltage Vvbc is generated based on the following equation (5).
  • Vvbc Vba + (Vbb ⁇ Vba) ⁇ (Vyc ⁇ Vya) / (Vyb ⁇ Vya) ... (5)
  • the interpolation calculation unit 24 uses the writing gradation voltages Vvac and Vvbc generated based on the expressions (2) and (5), respectively, to write the writing gradation based on the following expression (6).
  • Vvc Vvac + (Vvbc ⁇ Vvac) ⁇ (Vxc ⁇ Vxa) / (Vxb ⁇ Vxa) (6)
  • Equation (1) is respectively used for a pattern for generating the write gradation voltage Vvc using the write gradation voltages Vvca and Vvcb and a pattern for generating the write gradation voltage Vvc using the write gradation voltages Vvac and Vvbc.
  • the writing gradation voltage Vvc obtained based on 4) and Equation (6) has the same value.
  • the voltage-gradation value conversion unit 25 receives the writing gradation voltage writing gradation voltage Vvc from the interpolation operation unit 24, converts it into a gradation value (second writing gradation value), Second write gradation data WDb indicating a write gradation value of 2 is applied to the line buffer 130. As described above, the operation of the third case in the overdrive drive unit 122 is performed.
  • FIG. 10 is a diagram schematically showing the gradation value-gradation voltage characteristics in order to explain the operation of the third case in the present embodiment.
  • the write gradation voltage Vvc is obtained by a pattern for generating the write gradation voltage Vvc using the write gradation voltages Vvca and Vvcb.
  • the same explanation holds true for a pattern in which the write gradation voltage Vvc is generated using Vvbc.
  • the conventional liquid crystal display device has the write tone values Gaa, Gab, Gba, Gbb, the previous frame tone values Gxa, Gxb, Gxc, and the current frame tone value Gya.
  • the writing gradation value Gc obtained by the linear interpolation processing is converted into writing gradation voltage Vgc by the source driver 300 and applied to the liquid crystal. Since the response speed of the liquid crystal depends on the gradation voltage, the writing gradation voltage Vgc obtained by the linear interpolation processing based on the gradation value in the conventional liquid crystal display device does not become the above-described ideal writing voltage Vid. For this reason, an error voltage is generated in the third case in the conventional liquid crystal display device.
  • the liquid crystal display device has the write tone values Gaa, Gab, Gba, Gbb, the previous frame tone values Gxa, Gxb, Gxc, and the current frame tone value.
  • Write gradation voltages Vaa, Vab, Vba, Vbb, previous frame gradation voltages Vxa, Vxb, Vxc which are obtained by converting gradation voltages obtained by converting Gya, Gyb, Gyc to voltage values, respectively
  • the linear interpolation processing based on the above equations (1), (3), and (4) is performed, and the writing gradation voltages obtained by the linear interpolation processing Vvc is converted into a gradation value, and the gradation value is converted again into the writing gradation voltage Vvc in the source driver 300 and applied to the liquid crystal.
  • the overdrive driving unit 122 sets the first write gradation value, the previous frame gradation value, and the current frame gradation value to voltage values.
  • Linear interpolation processing is performed using the converted gradation voltage, previous frame gradation voltage, and current frame gradation voltage.
  • the overdrive driving unit 122 converts the writing gradation voltage obtained by the linear interpolation processing into the second writing gradation value, and performs the second writing indicating the second writing gradation value.
  • the gradation data WDb is output.
  • the response speed of the liquid crystal depends on the gradation voltage
  • an ideal writing gradation voltage corresponding to the VT characteristic of the liquid crystal is obtained by performing linear interpolation processing using the gradation voltage as in this embodiment. be able to. Therefore, a more appropriate liquid crystal response speed can be obtained as compared with a conventional liquid crystal display device that performs overdrive driving using an OS table that requires a relatively small memory capacity. Thereby, high-quality moving image display can be performed at low cost.
  • the linear interpolation process is used as the interpolation process, the above-described effects can be achieved with a simple process.
  • the gradation value closest to the previous frame gradation value and / or the current frame gradation value and the first writing gradation corresponding to them are used for the interpolation process, the gradation value other than the closest gradation value and the first written gradation value corresponding thereto may also be used for the interpolation process.
  • Second Embodiment> The second embodiment of the present invention predicts the arrival gradation of the previous frame gradation value in the first embodiment. Since the present embodiment has the same configuration and the like as those of the first embodiment except for the configuration and operation of the overdrive drive unit, the description of the common part is omitted. In addition, among the constituent elements of the present embodiment, the same elements as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
  • FIG. 11 is a block diagram for explaining a detailed configuration of the overdrive driving unit 122 in the present embodiment.
  • the overdrive drive unit 122 in the present embodiment is the same as the configuration in the first embodiment described above, as the reached gradation selection unit 31 as the second gradation selection unit and the second interpolation unit.
  • the arrival gradation interpolation processing unit 32 is added.
  • the reached gradation interpolation processing unit 32 includes an interpolation calculation unit 24.
  • the interpolation calculation unit 24 in the reached gradation interpolation processing unit 32 and the interpolation calculation unit 24 in the writing gradation interpolation processing unit 22 have the same functions. However, hereinafter, the interpolation calculation unit 24 in the reached gradation interpolation processing unit 32 is referred to as a “prediction interpolation calculation unit” for convenience.
  • LUT2 of a lookup table (hereinafter referred to as “prediction table”) is stored.
  • the prediction table LUT2 corresponds to a second lookup table.
  • FIG. 12 is a diagram schematically illustrating an example of the prediction table LUT2 in the present embodiment.
  • data for 16 gradations ⁇ 16 gradations are prepared in the prediction table LUT2.
  • the numerical value indicated in the leftmost column indicates the previous frame gradation value
  • the numerical value indicated in the uppermost line indicates the current frame gradation value.
  • the numerical value written at the position where each row and each column intersect indicates the reached gradation value determined based on the combination of each previous frame gradation value and each current frame gradation value. For example, when the previous frame gradation value is “64” and the current frame gradation value is “128”, the reached gradation value is “128”. For example, when the previous frame gradation value is “128” and the current frame gradation value is “8”, the reached gradation value is “17”. Thus, the reached gradation value stored in the prediction table is the same as or larger than the current frame gradation value.
  • the prediction table LUT2 is stored in, for example, the flash memory 200, and the timing controller IC 100 reads the prediction table LUT2 from the flash memory 200 immediately after the apparatus is turned on, and writes it into the internal SDRAM 160.
  • the arrival gradation selection unit 31 refers to the prediction table LUT2 shown in FIG. 12 on the basis of the previous frame gradation value indicated by the previous frame data PD and the current frame gradation value indicated by the current frame data CD.
  • the gradation value is determined, and the reached gradation data RD indicating the gradation value is written in the SDRAM 160 as the previous frame data PD in the next frame.
  • the reached gradation selection unit 31 closes the previous frame gradation value and / or the current frame gradation value closest to the combination.
  • the frame gradation value and the reached gradation value are given to the prediction interpolation calculation unit 24 in the reached gradation interpolation processing unit 32.
  • the prediction interpolation calculation unit 24 uses the previous frame gradation value and / or the current frame gradation value and the arrival gradation value received from the arrival gradation selection unit 31 to correspond to combinations that do not exist in the prediction table LUT2.
  • a linear interpolation process for obtaining the reached gradation value is performed, and the reached gradation data RD indicating the reached gradation value obtained by the interpolation process is written in the SDRAM 160 as the previous frame data PD in the next frame.
  • the reaching gradation data RD written from the reaching gradation selecting unit 31 to the SDRAM 160 is referred to as “first reaching gradation data”, and is represented by a symbol RDa.
  • the reached gradation data RD written to the SDRAM 160 from the reached gradation interpolation processing unit 32 (prediction interpolation calculation unit 24) is referred to as “second reached gradation data”, and is represented by the symbol RDb.
  • the arrival gradation value indicated by the first arrival gradation data RDa is referred to as “first arrival gradation value”
  • the arrival gradation value indicated by the second arrival gradation data RDb is referred to as “first arrival gradation value”. This is referred to as “2 reached gradation value”.
  • the previous frame gradation value indicated by the previous frame data PD received by the writing gradation selection unit 21 is the reached gradation value obtained in the previous frame. That is, the previous frame gradation value used when the writing gradation selection unit 21 refers to the OS table LUT1 is the current frame gradation value in the previous frame in the first embodiment, but in the present embodiment, The obtained gradation value is obtained.
  • the contents shown in FIG. 13 are used as the OS table LUT1 in the present embodiment, for example. This content is different from the OS table LUT1 shown in FIG. 4 in the first embodiment. Also in this embodiment, data for 16 gradations ⁇ 16 gradations are prepared in the OS table LUT1.
  • the reached gradation selection unit 31 receives the current frame data CD, and further reads the previous frame data PD stored in the SDRAM 160. Then, the reached gradation selection unit 31 refers to the prediction table LUT2 stored in the SDRAM 160 based on the previous frame gradation value indicated by the previous frame data PD and the current frame gradation value indicated by the current frame data CD.
  • the combination of the previous frame gradation value and the current frame gradation value exists in the prediction table LUT2 (hereinafter, sometimes simply referred to as “there is a combination”) and does not exist (hereinafter referred to as “there is a combination”).
  • the operations are different from each other simply by “when there is no combination”.
  • the operation when a combination exists is performed as follows.
  • the reached tone selection unit 31 acquires from the SDRAM 160 first reached tone data RDa indicating the first reached tone value corresponding to the combination of the previous frame tone value and the current frame tone value. Then, the reached gradation selection unit 31 writes the first reached gradation data RDa in the SDRAM 160 as the previous frame data PD in the next frame.
  • the arrival gradation The selection unit 31 includes a previous frame level that is present in the prediction table LUT2 and has a value smaller than the previous frame gradation value Gxc among the two previous frame gradation values closest to the previous frame gradation value Gxc.
  • a predicted gradation value Gaa corresponding to a combination of the key value Gxa and the current frame gradation value Gya existing in the prediction table LUT2 is acquired from the SDRAM 160.
  • the reached gradation selection unit 31 is present in the prediction table LUT2 and has a value greater than the previous frame gradation value Gxc of the two previous frame gradation values closest to the previous frame gradation value Gxc.
  • the reached gradation value Gba corresponding to the combination of the previous frame gradation value Gxb having a large value and the current frame gradation value Gya existing in the prediction table LUT2 is acquired from the SDRAM 160.
  • the reached gradation selection unit 31 acquires the previous frame gradation values Gxa and Gxb from the SDRAM 160 in addition to the reached gradation values Gaa and Gba acquired as described above. Then, the reached gradation selection unit 31 uses the prediction gradation values Gaa and Gba and the previous frame gradation values Gxa and Gxb acquired from the SDRAM 160, and the previous frame gradation value Gxc that does not exist in the prediction table LUT2, as a prediction interpolation calculation. Part 24 is given.
  • the prediction interpolation calculation unit 24 performs a known linear interpolation process on the reached gradation value using the reached gradation values Gaa and Gba and the previous frame gradation values Gxa, Gxb, and Gxc, thereby performing the second arrival. Generate tone values. Thereafter, the prediction interpolation calculation unit 24 writes the second arrival gradation data RD indicating the second arrival gradation value into the SDRAM 160 as the previous frame data PD in the next frame.
  • the reached gradation selection unit 31 also includes two previous frame gradation values Gxa existing in the prediction table LUT2 and two current frame gradations present in the prediction table LUT2 and closest to the current frame gradation value Gyc.
  • the reached gradation value Gab corresponding to the combination with the current frame gradation value Gyb having a value larger than the current frame gradation value Gyc is acquired from the SDRAM 160.
  • the reached gradation selection unit 31 acquires the current frame gradation values Gya and Gyb from the SDRAM 160 in addition to the reached gradation values Gaa and Gab acquired as described above. Then, the reached gradation selection unit 31 uses the write gradation values Gaa and Gab and the current frame gradation values Gya and Gyb acquired from the SDRAM 160 and the current frame gradation value Gyc that does not exist in the prediction table LUT2 for prediction interpolation. It gives to the calculating part 24.
  • the prediction interpolation calculation unit 24 performs a known linear interpolation process on the reached gradation value using the reached gradation values Gaa, Gab and the current frame gradation values Gya, Gyb, Gyc, thereby obtaining the second arrival value. Generate tone values.
  • the subsequent operation is the same as in the first case.
  • the arrival gradation The selection unit 31 includes a previous frame level that is present in the prediction table LUT2 and has a value smaller than the previous frame gradation value Gxc among the two previous frame gradation values closest to the previous frame gradation value Gxc.
  • the current frame level having a value smaller than the current frame tone value Gyc, out of the two current frame tone values present in the prediction table LUT2 and closest to the current frame tone value Gyc.
  • the reached gradation value Gaa corresponding to the combination with the tone value Gya is acquired from the SDRAM 160.
  • the reached gradation selection unit 31 is present in the prediction table LUT2 and has a value greater than the previous frame gradation value Gxc of the two previous frame gradation values closest to the previous frame gradation value Gxc. Is smaller than the current frame tone value Gyc of two current frame tone values that are present in the prediction table LUT2 and are closest to the current frame tone value Gyc.
  • the reached gradation value Gab corresponding to the combination with the current frame gradation value Gyb having a large value is acquired from the SDRAM 160.
  • the reached gradation selection unit 31 is present in the prediction table LUT2 and has a value greater than the previous frame gradation value Gxc of the two previous frame gradation values closest to the previous frame gradation value Gxc. Is greater than the current frame tone value Gyc of the two current frame tone values that are present in the prediction table LUT2 and are closest to the current frame tone value Gyc.
  • the reached gradation value Gba corresponding to the combination with the current frame gradation value Gya having a small value is acquired from the SDRAM 160.
  • the reached gradation selection unit 31 is present in the prediction table LUT2 and has a value greater than the previous frame gradation value Gxc of the two previous frame gradation values closest to the previous frame gradation value Gxc. Is greater than the current frame tone value Gyc of the two current frame tone values that are present in the prediction table LUT2 and are closest to the current frame tone value Gyc.
  • the reached gradation value Gbb corresponding to the combination with the current frame gradation value Gyb having a large value is acquired from the SDRAM 160.
  • the reached gradation selection unit 31 includes the previous frame gradation values Gxa, Gxb and the current frame gradation values Gya, Gyb is acquired from the SDRAM 160. Then, the reached gradation selection unit 31 stores the reached gradation values Gaa, Gab, Gba, Gbb, the previous frame gradation values Gxa, Gxb, the current frame gradation values Gya, Gyb acquired from the SDRAM 160, and the prediction table LUT2. The pre-existing previous frame gradation value Gxc and the current frame gradation value Gyc are supplied to the prediction interpolation calculation unit 24.
  • the prediction interpolation calculation unit 24 uses the reached gradation values Gaa, Gab, Gba, Gbb, the previous frame gradation values Gxa, Gxb, Gxc, and the current frame gradation values Gya, Gyb, Gyc to achieve the reached gradation values.
  • the second reached gradation value is generated by performing a known linear interpolation process for the above. The subsequent operation is the same as in the first case.
  • the reached gradation data RD indicating the reached gradation value is written in the SDRAM 160 as the previous frame data PD in the next frame.
  • the reached gradation value obtained by using the prediction table LUT2 in the previous frame is used for referring to the OS table LUT1 as the previous frame gradation value in the current frame. Therefore, overdrive driving can be performed using the previous frame gradation value with higher accuracy than in the first embodiment. As a result, the response speed of the liquid crystal is corrected more appropriately, so that the image quality of the moving image display can be further improved.
  • the tone value closest to the previous frame tone value and / or the current frame tone value, and the first reached tone value corresponding to them. are used for the interpolation process, but a gradation value other than the closest gradation value and the first reached gradation value corresponding to the gradation value may also be used for the interpolation process (a third value described later). The same applies to the embodiment).
  • the third embodiment of the present invention performs linear interpolation processing using voltage values when there is no combination in the prediction table LUT2 in the second embodiment. Since the present embodiment has the same configuration and the like as the second embodiment except for the configuration and operation of the reached gradation interpolation processing unit 32, the description of the common portion is omitted. In addition, among the components of the present embodiment, the same elements as those in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
  • FIG. 14 is a block diagram for explaining a detailed configuration of the reached gradation interpolation processing unit 32 in the overdrive driving unit 122 in the present embodiment.
  • the reached gradation interpolation processing unit 32 in the overdrive drive unit 122 in this embodiment includes a gradation value-voltage conversion unit 23 and a voltage in the preceding stage and the subsequent stage of the prediction interpolation calculation unit 24, respectively.
  • a tone value conversion unit 25 is added.
  • the gradation value-voltage conversion unit 23 and the voltage-gradation value conversion unit 25 in the reached gradation interpolation processing unit 32 are respectively the gradation value-voltage conversion unit 23 and the voltage- in the writing gradation interpolation processing unit 22.
  • gradation value conversion unit 25 It has the same function as the gradation value conversion unit 25.
  • the gradation value-voltage conversion unit 23 and the voltage-gradation value conversion unit 25 in the reached gradation interpolation processing unit 32 will be referred to as “prediction gradation value-voltage conversion unit” and “prediction This is called a “voltage-gradation value converter”.
  • the prediction gradation value-voltage conversion unit 23 receives the arrival gradation values Gaa and Gba and the previous frame gradation values Gxa, Gxb, and Gxc from the arrival gradation selection unit 31, and supplies them to the first embodiment. Similarly to the gradation value-voltage conversion unit 23 in FIG. Thereby, the reached gradation voltages Vaa, Vba and the previous frame gradation voltages Vxa, Vxb, Vxc are obtained.
  • “reached gradation voltage” refers to a gradation voltage obtained by converting the reached gradation value into a voltage value.
  • the prediction interpolation calculation unit 24 receives the reached gradation voltages Vaa and Vba and the previous frame gradation voltages Vxa, Vxb, and Vxc from the prediction gradation value-voltage conversion unit 23, and The reached gradation voltage Vvca is generated and output based on the above equation (1).
  • the prediction voltage-gradation value conversion unit 25 receives the reached gradation voltage Vvca from the prediction interpolation calculation unit 24, and converts it to the gradation in the same manner as the voltage-gradation value conversion unit 25 in the first embodiment. Value (second reached gradation value). Then, the prediction voltage-gradation value conversion unit 25 writes the second arrival gradation data RD indicating the second arrival gradation value into the SDRAM 160 as the previous frame data PD in the next frame.
  • the prediction gradation value-voltage conversion unit 23 receives the arrival gradation values Gaa and Gab and the current frame gradation values Gya, Gyb, and Gyc from the arrival gradation selection unit 31, and supplies them to the first embodiment. Similarly to the gradation value-voltage conversion unit 23 in FIG. Thereby, the reached gradation voltages Vaa, Vab and the current frame gradation voltages Vya, Vyb, Vyc are obtained.
  • the prediction interpolation calculation unit 24 receives the reached gradation voltages Vaa and Vab and the current frame gradation voltages Vya, Vyb, and Vyc from the prediction gradation value-voltage conversion unit 23, and Based on the above equation (2), the reached gradation voltage Vvac is generated and output.
  • the prediction voltage-gradation value conversion unit 25 receives the reached gradation voltage Vvac from the prediction interpolation calculation unit 24, and converts it to the gradation in the same manner as the voltage-gradation value conversion unit 25 in the first embodiment. Value (second reached gradation value). The subsequent operation is the same as in the first case.
  • the prediction gradation value-voltage conversion unit 23 receives the arrival gradation values Gaa, Gab, Gba, Gbb, the previous frame gradation values Gxa, Gxb, Gxc, and the current frame gradation value Gya, from the arrival gradation selection unit 31. Gyb and Gyc are received and converted into voltage values in the same manner as the gradation value-voltage conversion unit 23 in the first embodiment. Thus, the reached gradation voltages Vaa, Vab, Vba, Vbb, the previous frame gradation voltages Vxa, Vxb, Vxc, and the current frame gradation voltages Vya, Vyb, Vyc are obtained.
  • the prediction interpolation calculation unit 24 receives the reached gradation voltages Vaa, Vab, Vba, Vbb and the previous frame gradation voltages Vxa, Vxb, Vxc from the prediction gradation value-voltage conversion unit 23. , And current frame gray scale voltages Vya, Vyb, Vyc. Then, the prediction interpolation calculation unit 24 generates the write gradation voltage Vvc based on the above (4) using the reached gradation voltages Vvca and Vvcb obtained based on the above (1) and the expression (3), respectively. Or, using the reached gradation voltages Vvac and Vvbc obtained respectively based on the above equations (2) and (5), the write gradation voltage Vvc is generated based on the above equation (6). Output.
  • the prediction voltage-gradation value conversion unit 25 receives the reached gradation voltage Vvc from the prediction interpolation calculation unit 24, and converts it to the gradation in the same manner as the voltage-gradation value conversion unit 25 in the first embodiment. Value (second reached gradation value). The subsequent operation is the same as in the first case.
  • the above error voltage does not occur for the same reason as the operation of the first to third cases in the first embodiment.
  • the details are omitted because the writing gradation value and the writing gradation voltage are respectively replaced with the reaching gradation value and the reaching gradation voltage in the description of the first embodiment.
  • the linear interpolation process when the combination does not exist in the prediction table LUT2 is performed by using the gradation voltage. For this reason, since the linear interpolation process is performed in consideration of the VT characteristics of the liquid crystal, an accurate reached gradation value can be obtained as compared with the second embodiment. Since the reached gradation value obtained in this manner is used for overdrive driving as the previous frame gradation value, the response speed of the liquid crystal is corrected more appropriately than in the second embodiment. Thereby, the image quality of moving image display can be further improved.
  • the contents of the lookup tables shown in FIGS. 4, 12, and 13 are merely examples, and the lookup tables used in the present invention are not limited to the contents.
  • the writing gradation interpolation processing unit 22 and the reached gradation interpolation processing unit 24 are separate components, but may be realized as a single component. good.
  • linear interpolation processing is used as interpolation processing, but other interpolation processing may be used.
  • the above-described embodiments can be variously modified and implemented without departing from the spirit of the present invention.
  • the present invention it is possible to provide a display control circuit that enables high-quality moving image display at low cost, a liquid crystal display device including the display control circuit, and a display control method.
  • the present invention can be applied to a display control circuit for performing overdrive driving that emphasizes a temporal change of a signal with respect to an image signal, a liquid crystal display device including the display control circuit, and a display control method.
  • Liquid crystal display panel 21 Writing gradation selection section (first gradation selection section) 22... Write gradation interpolation processing unit (first interpolation unit) 23 ... gradation value-voltage conversion unit 24 ... interpolation calculation unit 25 ... voltage-gradation value conversion unit 31 ... reached gradation selection unit (second gradation selection unit) 32 .. reached gradation interpolation processing unit (second interpolation unit) 100 ... Timing controller IC (display control circuit) 122: Overdrive drive unit 160: SDRAM (storage unit) LUT1 ... OS table (first lookup table) LUT2 ... Prediction table (second lookup table) CD ... current frame data PD ... previous frame data WDa ...

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Abstract

L'invention concerne un circuit de commande d'affichage qui permet d'afficher à peu de frais une vidéo animée avec une haute qualité d'image. Une unité de commande de surcharge (122) comprend une unité de sélection de gradation d'écriture (21) et une unité de traitement d'interpolation de gradation d'écriture (22). L'unité de sélection de gradation d'écriture (21) acquiert une première valeur de gradation d'écriture et génère des premières données de gradation d'écriture (RDa) à partir d'une SDRAM (160) lorsqu'une combinaison d'une valeur de gradation de trame précédente et une valeur de gradation de trame actuelle est présente dans une table OS (LUT1) et fournit la valeur de gradation de trame précédente et/ou la valeur de gradation de trame actuelle qui sont les plus proches de la combinaison et la première valeur de gradation d'écriture à l'unité de traitement d'interpolation de gradation d'écriture (22) lorsque la combinaison n'est pas présente dans la table OS (LUT1). L'unité de traitement d'interpolation de gradation d'écriture (22) convertit la valeur de gradation reçue en une valeur de tension, exécute un processus d'interpolation linéaire au moyen de la valeur de tension, convertit la valeur de tension obtenue en une seconde valeur de gradation d'écriture, et génère des secondes données de gradation d'écriture (RDb).
PCT/JP2012/075311 2011-10-06 2012-10-01 Circuit de commande d'affichage, dispositif d'affichage à cristaux liquides comprenant un circuit de commande d'affichage, et procédé de commande d'affichage WO2013051490A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105096895A (zh) * 2015-09-21 2015-11-25 北京集创北方科技有限公司 一种数字图像的数据处理方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004246312A (ja) * 2002-12-19 2004-09-02 Sharp Corp 液晶表示装置
JP2007178561A (ja) * 2005-12-27 2007-07-12 Sharp Corp 表示装置およびその駆動方法
JP2008096875A (ja) * 2006-10-16 2008-04-24 Infovision Optoelectronics Holdings Ltd アクティブマトリックス型液晶表示装置の駆動回路とアクティブマトリックス型液晶表示装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004246312A (ja) * 2002-12-19 2004-09-02 Sharp Corp 液晶表示装置
JP2007178561A (ja) * 2005-12-27 2007-07-12 Sharp Corp 表示装置およびその駆動方法
JP2008096875A (ja) * 2006-10-16 2008-04-24 Infovision Optoelectronics Holdings Ltd アクティブマトリックス型液晶表示装置の駆動回路とアクティブマトリックス型液晶表示装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105096895A (zh) * 2015-09-21 2015-11-25 北京集创北方科技有限公司 一种数字图像的数据处理方法

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