WO2008065935A1 - Circuit de conversion de signaux et dispositif d'affichage à cristaux liquides à couleurs primaires multiples équipé du circuit - Google Patents
Circuit de conversion de signaux et dispositif d'affichage à cristaux liquides à couleurs primaires multiples équipé du circuit Download PDFInfo
- Publication number
- WO2008065935A1 WO2008065935A1 PCT/JP2007/072463 JP2007072463W WO2008065935A1 WO 2008065935 A1 WO2008065935 A1 WO 2008065935A1 JP 2007072463 W JP2007072463 W JP 2007072463W WO 2008065935 A1 WO2008065935 A1 WO 2008065935A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- primary
- pixel
- conversion circuit
- signal
- color
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- 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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/52—RGB geometrical arrangements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0439—Pixel structures
- G09G2300/0443—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations
- G09G2300/0447—Pixel structures with several sub-pixels for the same colour in a pixel, not specifically used to display gradations for multi-domain technique to improve the viewing angle in a liquid crystal display, such as multi-vertical alignment [MVA]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0439—Pixel structures
- G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
-
- 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
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
-
- 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
- G09G2340/06—Colour space transformation
Definitions
- the present invention relates to a liquid crystal display device, and more particularly to a multi-primary color liquid crystal display device that performs display using four or more primary colors.
- the present invention also relates to a signal conversion circuit used in such a liquid crystal display device.
- one pixel is composed of three sub-pixels that display the three primary colors of light, red, green, and blue, which enables color display.
- FIG. 16 shows the color reproduction range of a conventional display device that displays using the three primary colors.
- FIG. 16 is an xy chromaticity diagram in the XYZ color system. A triangle having apexes of three points corresponding to the three primary colors of red, green, and blue represents the color reproduction range. Also, in the figure, the colors of various objects that exist in nature, as revealed by Pointer (see Non-Patent Document 1), are plotted with X marks. As can be seen from Fig. 16, there are object colors that are not included in the color reproduction range, and some display colors cannot be displayed on display devices that display using the three primary colors!
- Patent Document 1 For example, in Patent Document 1, as shown in FIG. 17, six subpixels R, G, B, Ye, C, and M that display red, green, blue, yellow, cyan, and magenta are used.
- a liquid crystal display device 800 in which the pixel P is configured is disclosed.
- the color reproduction range of this liquid crystal display device 800 is shown in FIG. As shown in Fig. 18, the color reproduction range represented by a hexagon with six points corresponding to the six primary colors as vertices almost covers the object colors. Thus, the color reproduction range can be widened by increasing the number of primary colors used for display.
- Multi-primary color display devices Display devices that perform display using four or more primary colors are collectively referred to as “multi-primary color display devices”, and liquid crystal display devices that perform display using four or more primary colors are referred to as “multi-primary color liquid crystal display devices (or simply multi-color display devices”).
- Primary color LCD Primary color LCD
- conventional general display devices that display using the three primary colors are collectively referred to as “three primary color display devices”, and liquid crystal display devices that display using the three primary colors are referred to as “three primary color liquid crystal display devices (or simply three primary color LCDs)”. Called.
- the format of the video signal input to the three primary color display device is generally an RGB format or a YCr Cb format. Since the video signals of these formats include three parameters (a so-called three-dimensional signal), the luminance of the three primary colors (red, green and blue) used for display is uniquely determined.
- Patent Document 1 Special Table 2004-529396
- Non-Patent Document 1 ⁇ R. Pointer, i3 ⁇ 4e gamut or real surrace colors, olor Research and d Application, Vol.5, No.3, pp.145—155 (1980)
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a signal conversion circuit suitably used for a multi-primary-color liquid crystal display device and a multi-stage including such a signal conversion circuit. It is to provide a primary color liquid crystal display device.
- the signal conversion circuit according to the present invention is used in a multi-primary color liquid crystal display device that performs display using four or more primary colors, and the input video signal is converted into a multi-primary color signal corresponding to four or more primary colors.
- This is a signal conversion circuit for converting, and when a pixel of a multi-primary color liquid crystal display device generates a multi-primary color signal for displaying a dark skin in the Macbeth chart, it indicates the chromaticity when the pixel is viewed from the front.
- the signal conversion circuit according to the present invention is configured such that when the pixels of the multi-primary color liquid crystal display device generate a multi-primary color signal for displaying a dark skin in the Macbeth chart, the color difference is generated. Video signal conversion is performed so that ⁇ ⁇ ⁇ is 0.008 or less.
- the signal conversion circuit according to the present invention is configured such that when the pixels of the multi-primary color liquid crystal display device generate a multi-primary color signal for displaying a light skin in the Macbeth chart, the color difference is generated. Video signal conversion is performed so that ⁇ ⁇ ⁇ is 0.01 or less.
- the signal conversion circuit according to the present invention is used in a multi-primary liquid crystal display device that performs display using four or more primary colors, and the input video signal corresponds to four or more primary colors.
- This is a signal conversion circuit that converts signals into a signal when the pixels of the multi-primary-color liquid crystal display device generate a multi-primary-color signal for displaying the light skin in the Macbeth chart when the pixel is viewed from the front.
- the signal conversion circuit according to the present invention is configured such that when a pixel of a multi-primary-color liquid crystal display device generates a multi-primary signal for displaying a light skin in a Macbeth chart, the color difference is calculated. Video signal conversion is performed so that ⁇ ⁇ ⁇ is 0.008 or less.
- the signal conversion circuit refers to a lookup table based on an input video signal when the number of primary colors used for display is ⁇ . By illuminating, the brightness of (n-3) primary colors out of the n primary colors is obtained.
- the luminance of the remaining three primary colors out of the n primary colors is calculated by performing an operation using the luminance of the M primary colors.
- a signal conversion circuit includes a lookup table memory that stores the lookup table, and an arithmetic unit that performs the arithmetic operation.
- a multi-primary color liquid crystal display device comprises a signal conversion circuit having the above-described configuration and a liquid crystal display panel to which a multi-primary color signal generated by the signal conversion circuit is input.
- the signal conversion circuit converts the input video signal into a multi-primary signal corresponding to four or more primary colors, and the chromaticity when the pixel is viewed from the front and the pixel from an oblique direction.
- the video signal is converted so that the difference from the viewed chromaticity is smaller than a predetermined value.
- the signal conversion circuit when generating a multi-primary color signal for displaying a dark skin, shows CIE1976 chromaticity indicating the chromaticity when the pixel is viewed from the front direction.
- Color difference A uV ((u '), defined by coordinates (u', ⁇ ') and CIE1976 chromaticity coordinates (u', V ') indicating chromaticity when the pixel is viewed from an oblique 60 ° direction _u ') 2 + ( ⁇ '- ⁇ ') 2 ) is 0.03 or higher
- the signal conversion circuit converts the video signal so that the color difference ⁇ ⁇ ⁇ is 0.01 or less when generating the multi-primary color signal for displaying the light skin. Therefore, it is possible to suppress deviations in hue and saturation due to white floating (gamma characteristic viewing angle dependency), and high-quality display can be realized in a multi-primary color liquid crystal display device.
- FIG. 1 is a block diagram schematically showing a liquid crystal display device 100 according to a preferred embodiment of the present invention.
- FIG. 2 is a diagram showing an example of a pixel configuration of the liquid crystal display device 100.
- FIG. 3 (a) to (c) are a top view, a front view, and a side view for explaining chromaticity measurement conditions.
- FIG.4 Three primary colors LCD red subpixel, green subpixel and blue subpixel respectively! /, 5 is a graph showing the relationship between the luminance characteristics in the front direction and the luminance characteristics in the oblique 60 ° direction.
- FIG. 5 is an xy chromaticity diagram showing the chromaticity shift when the pixels of the three primary color LCDs are viewed obliquely from 60 °.
- FIG. 6 The relationship between the luminance characteristics in the front direction and the luminance characteristics in the diagonal 60 ° direction for each of the red subpixel, green subpixel, blue subpixel, yellow subpixel, and cyan subpixel of the multi-primary LCD. It is a graph to show.
- FIG. 7 is an xy chromaticity diagram showing a chromaticity shift when a pixel of a multi-primary color LCD is viewed from an oblique direction of 60 °.
- FIG. 9 is an xy chromaticity diagram showing a chromaticity shift when a pixel of a multi-primary color LCD is viewed from an oblique direction of 60 °.
- FIG. 11 is an xy chromaticity diagram showing a chromaticity shift when a pixel of a multi-primary color LCD is viewed from an oblique direction of 60 °.
- FIG. 12 is a graph showing XYZ values of display colors when pixels are viewed from the front.
- FIG. 13 is a graph showing XYZ values of display colors when pixels are viewed from an oblique 60 ° direction.
- FIG. 14 is a block diagram showing an example of a preferable configuration of the signal conversion circuit 20 included in the liquid crystal display device 100.
- FIG. 15 is a block diagram showing another example of a preferable configuration of the signal conversion circuit 20 included in the liquid crystal display device 100.
- FIG. 16 is an xy chromaticity diagram showing the color reproduction range of the three primary colors LCD.
- FIG. 17 is a diagram schematically showing a conventional multi-primary LCD800.
- FIG. 18 is an xy chromaticity diagram showing a color reproduction range of the multi-primary LCD800. Explanation of symbols
- Display modes with improved viewing angle characteristics include IPS (In-Plane Switching) mode disclosed in Japanese Patent Publication No. 63-21907 and Japanese Patent Laid-Open No. 11-242225.
- IPS In-Plane Switching
- MVA Mult Domain Vertical Alignment
- CPA Continuous Pinwheel Alignment
- the viewing angle dependency of the ⁇ characteristic is visually recognized as a phenomenon in which the display brightness during oblique observation becomes higher than the original display brightness (called “whitening”).
- white floating occurs, the problem is that the color displayed by the pixel differs between when viewed from the front and when viewed from an oblique direction.
- the inventor of the present application has conducted various studies on signal conversion techniques used in multi-primary LCDs. As a result, we found a signal conversion method that can suppress the degradation of display quality caused by color shift caused by whitening.
- FIG. 1 shows a liquid crystal display device 100 in the present embodiment.
- Liquid crystal display 100 is a liquid crystal display device 100 in the present embodiment.
- FIG. 1 it is a multi-primary LCD that includes a liquid crystal display panel 10 and a signal conversion circuit 20, and displays four or more primary colors.
- the liquid crystal display device 100 has a plurality of pixels arranged in a matrix, and each pixel is defined by a plurality of sub-pixels.
- FIG. 2 shows an example of the pixel configuration of the liquid crystal display device 100.
- the plurality of sub-pixels that define each pixel include a red sub-pixel R that displays red, a green sub-pixel G that displays green, a blue sub-pixel B that displays blue, and yellow.
- the plurality of subpixels defining each pixel need only include four or more subpixels that display different primary colors.
- the signal conversion circuit 20 converts the input video signal into a multi-primary color signal corresponding to four or more primary colors. For example, as shown in FIG. 1, the signal conversion circuit 20 converts an RGB format video signal (three-dimensional signal) including components indicating red, green and blue luminances into red, green, blue, yellow and red. It is converted to a multi-primary color signal containing components indicating the respective luminances of cyan.
- RGB format video signal three-dimensional signal
- the liquid crystal display panel 10 receives the multi-primary color signal generated by the signal conversion circuit 20, and displays a color corresponding to the input multi-primary color signal by each pixel.
- various display modes for example, MVA mode, CPA mode, IPS mode
- MVA mode MVA mode
- CPA mode CPA mode
- IPS mode IPS mode
- the video signal input to the signal conversion circuit 20 is a three-dimensional signal. Any format is acceptable as long as it is XYZ format or YCrCb format.
- the memory color is regarded as important. Since the image displayed on the display device cannot be directly compared with the subject in most cases, the relationship between the display image and the image stored by the observer is important.
- human skin color hereinafter referred to as “skin color”) is considered to be particularly important among memory colors.
- the signal conversion circuit 20 in the present embodiment generates chromaticity when a pixel is viewed from the front when generating a multi-primary color signal for displaying at least a specific skin color (human skin color).
- the video signal is converted so that the difference from the chromaticity when the pixel is viewed obliquely (ie, “color difference”) is smaller than a predetermined value.
- color difference the difference from the chromaticity when the pixel is viewed obliquely
- a high-quality display is realized in which the color shift due to whitening is difficult to see. More specific description will be given below.
- the color difference here refers to the CIE1976 chromaticity coordinates (u ', ⁇ ') indicating the chromaticity when the pixel is also viewed in the front direction force, and the chromaticity when the pixel is viewed from an oblique 60 ° direction.
- the color difference AuV ((u, -u ') 2 + ( ⁇ '- ⁇ ') 2 ) defined by the CIE1976 chromaticity coordinates (u ', V') indicating
- the signal conversion circuit 20 in the present embodiment converts a multi-primary color signal for displaying a dark skin in a Macbeth chart (a color checker generally used for confirming color reproducibility). At the time of generation, the video signal is converted so that the color difference ⁇ ⁇ ⁇ is 0.03 or less. In addition, (or) when the signal conversion circuit 20 generates a multi-primary color signal for displaying a light skin, it converts the video signal so that the color difference A uV is 0.01 or less. Do.
- chromaticity is a colorimetric property that depends on hue and saturation
- a small color difference AuV means that a deviation in hue and saturation is small.
- the color difference AuV when displaying dark skin exceeds 0.03, and the color difference AuV when displaying light skin exceeds 0.01. Therefore, when the color difference AuV is within the above range, it is possible to suppress the deviation of hue and saturation caused by whitening more than the conventional three-primary color LCD with the force S.
- FIGS. 3A to 3C are a top view, a front view, and a side view for explaining chromaticity measurement conditions.
- the display surface of the liquid crystal display device 100 is inclined in the front direction and at an angle of 60 ° (for example, 60 ° in the horizontal direction as shown in the figure).
- Direction and measure with the signal input so that the chromaticity of the pixel becomes the chromaticity of the dark skin and light skin when measured with the chromaticity meter in the front direction.
- a region (measurement point) that is actually a target of chromaticity measurement within the display surface has an area of about 50 to 100 pixels in order to avoid the influence of a black mask or the like of each pixel. I like it.
- the Y value (luminance) of dark skin and light skin is 100% of the white Y value displayed in the window corresponding to 4% of the display surface (shown in Fig. 3 (b)! /). As a relative value.
- the color difference ⁇ ⁇ ⁇ is set to 0.008. It is more preferable to convert the video signal so as to be as follows. By setting the color difference AuV within such a range, it is possible to greatly suppress hue and saturation shifts caused by whitening, and a very high display quality can be obtained.
- the signal conversion circuit 20 uses the hue and By reducing the saturation shift preferentially, the deterioration of display quality is greatly suppressed.
- FIG. 4 is a diagram for clearly expressing the difference between the luminance characteristic in the front direction and the luminance characteristic in the oblique 60 ° direction for each of the red subpixel, the green subpixel, and the blue subpixel of the three primary color LCD.
- the value on the horizontal axis is the frontal luminance
- the value on the vertical axis is the frontal luminance and the 60 ° diagonal luminance corresponding to the front direction and 60 ° diagonal direction, respectively, and the deviation of the luminance characteristics is manifested. It is. Note that the luminance in each direction is normalized by assuming that the luminance when a white voltage (maximum gradation voltage) is applied is 1.
- the luminance characteristics (R, G, B) in the 60 ° direction are curved.
- the amount of deviation of this curve from the straight line indicating the luminance characteristics in the front direction quantitatively indicates the amount of deviation (difference! /)
- Fig. 6 shows the difference between the luminance characteristic in the front direction and the luminance characteristic in the diagonal 60 ° direction for each of the red subpixel, green subpixel, blue subpixel, yellow subpixel, and cyan subpixel of the multi-primary color LCD. It is a graph to show. From Fig. 6, it can be seen that the multi-primary color LCD It can be seen that the luminance characteristics (REF) in the front direction and the luminance characteristics (R, G, B, Ye, C) in the diagonal 60 ° direction are different.
- REF luminance characteristics
- a multi-primary LCD there are a plurality of combinations of luminance of each sub-pixel for displaying a certain color of the pixel.
- Table 2 displays primary colors that indicate chromaticity x, y, and Y values.
- a combination that reduces the chromaticity shift is selected.
- Table 3 shows the luminance of each sub-pixel (LR, LG, LB, LYe, LC) as well as the luminance when viewed from an oblique 60 ° direction (that is, the white floating luminance), viewed from the oblique 60 ° direction.
- the Y value, chromaticity x, y, and color difference AuV indicating the color of the pixel at the time are also shown.
- Table 4 also shows the subpixels for displaying the same dark skin in the three primary color LCD. Indicates a combination of luminance.
- multi-primary LCDs have multiple combinations of brightness for displaying dark skins.
- Table 4 in the three primary color LCD, there is one luminance combination for displaying dark skin.
- the signal conversion circuit 20 generates a multi-primary color signal so as to select a combination (for example, # 1 or # 2) in which the color difference ⁇ ′ ⁇ ′ is 0 ⁇ 03 or less among a plurality of combinations.
- a combination for example, # 1
- # 1 the color difference ⁇ ′ ⁇ ′ is 0 ⁇ 03 or less among a plurality of combinations.
- multi-primary LCDs have multiple combinations of brightness for displaying light skins.
- Table 6 in the three primary color LCD, there is only one luminance combination for displaying the light skin.
- the signal conversion circuit 20 generates a multi-primary color signal so as to select a combination (for example, # 4 or # 5) in which the color difference A uV is 0.01 or less among a plurality of combinations.
- a combination for example, # 4 and Well 5 satisfy this condition! /, Which will satisfy this condition
- the power described so far is that the luminance of each sub-pixel increases at the same rate (uniformly multiplied by A) when the pixel is viewed from an oblique direction.
- the luminance of each sub-pixel does not necessarily have to increase at the same rate. Yes.
- LG (XG, YG, ZG) 0.001 (0.070, 0.187, 0.029) ... (14)
- the colors (X, Y, ⁇ ) displayed by the pixels are (0.391, 0.358, 0.289) as can be seen from the following equations (18) to (20) and FIG.
- the value obtained by multiplying the brightness and chromaticity is 1.24 times and 35.0 times, respectively, on the right side of equations (13) to (; 17), as shown in the following equations (2 ;!) to (25). 0.97 times, 1.04 times, and 17.7 times.
- the signal conversion circuit 20 determines the chromaticity from the combination of the luminance values of the sub-pixels. It is sufficient to generate a multi-primary color signal so as to select a combination that reduces the deviation. It is not always necessary to select a combination that increases the luminance of each sub-pixel at almost the same rate when viewed from an oblique direction. May be.
- the signal conversion circuit 20 has a lookup table including data indicating sub-pixel luminance corresponding to the color specified by the video signal (three-dimensional signal), for example, so as to respond to the input video signal. It is possible to generate a multi-primary color signal with reference to the lookup table. However, if the data indicating sub-pixel luminance is included in the lookup table for all colors, the amount of data in the lookup table increases, and the lookup table can be easily configured using an inexpensive memory with a small capacity. It is difficult to do.
- FIG. 14 shows an example of a preferable configuration of the signal conversion circuit 20.
- a signal conversion circuit 20 shown in FIG. 14 includes a color coordinate conversion unit 21, a lookup table memory 22, and a calculation unit 23.
- the color coordinate conversion unit 21 receives a video signal indicating the luminance of the three primary colors, and converts the color coordinates in the RGB color space to color coordinates in the XYZ color space. Specifically, the color coordinate conversion unit 21 applies an RGB signal (including components Ri, Gi, and Bi corresponding to each luminance of red, green, and blue) as shown in the following formula (30). XYZ values are obtained by performing matrix transformation.
- the 3 ⁇ 3 matrix illustrated in Equation (30) is defined based on the BT.709 standard.
- the look-up table memory 22 stores a look-up table! /.
- This look-up table has data indicating the luminance values of the yellow and cyan sub-pixels corresponding to the luminances Ri, Gi and Bi of the three primary colors indicated in the video signal.
- the luminance Ri, Gi, and Bi are obtained by performing inverse ⁇ correction on the gradation value expressed in 256 gradations, and the number of colors that can be specified by the video signal is 256 ⁇ 256 ⁇ 256.
- the look-up table in the look-up table memory 22 has 256 ⁇ 256 ⁇ 256 three-dimensional matrix structure data corresponding to the number of colors that can be specified by the video signal.
- the calculation unit 23 performs a calculation using the XYZ values obtained by the color coordinate conversion unit 21 and the luminances Ye and C of the yellow and cyan sub pixels obtained by the lookup table memory 22. Calculate the luminance R, G, and B of the red, green, and blue subpixels. Specifically, the calculation unit 23 performs a calculation according to the following equation (31).
- Equation (32) The color specified by the video signal input to the signal conversion circuit 20 and the signal conversion circuit 2 Assuming that the color specified by the multi-primary signal output from 0 is the same, the XYZ values obtained by converting the luminances Ri, Bi, and Gi of the three primary colors are red as shown in Equation (32). It is also expressed by a matrix conversion formula for the luminance R, G, B, Ye, and C of the sub-pixel, green sub-pixel, blue sub-pixel, yellow sub-pixel, and cyan sub-pixel.
- the coefficients X, Y, Z... ⁇ of the 3-by-5 conversion matrix shown in Equation (32) are the ⁇ of each sub-pixel of the liquid crystal display panel 10
- Equation (32) The right side of equation (32) is obtained by multiplying R, G, and B by a 3-by-3 conversion matrix as shown in equation (33), and Ye, C by 3-by-2. It can be transformed into a sum with the product of the transformation matrix.
- equation (31) By further modifying this equation (33), equation (31) can be obtained. Therefore, by performing the calculation according to equation (31), the luminances R, G of the red subpixel, the green subpixel, and the blue subpixel can be obtained. , B can be calculated.
- the calculation unit 23 is based on the XYZ values obtained by the color coordinate conversion unit 21 and the luminances Ye and C of the yellow and cyan sub pixels obtained by the look-up table memory 22. Obtaining the luminance R, G, B of the red subpixel, green subpixel, and blue subpixel.
- the lookup table stored in the look-up table memory 22 need not include data indicating the luminance of all five subpixels. Data indicating the luminance of two subpixels out of the five subpixels is not necessary. Only need to be included. Therefore, when the configuration shown in FIG. 14 is adopted, the lookup table can be simply configured using an inexpensive memory having a small capacity.
- FIG. 15 shows another example of a preferable configuration of the signal conversion circuit 20.
- the signal conversion circuit 20 shown in FIG. 15 has the signal conversion circuit shown in FIG. 14 in that it further includes an interpolation unit 24 in addition to the color coordinate conversion unit 21, the lookup table memory 22, and the calculation unit 23. Different from 20.
- the look-up table data corresponds to the same number of colors specified by the video signal, whereas in the conversion circuit 20 shown in FIG. This corresponds to a smaller number of colors than the number of colors specified by the video signal.
- the luminance Ri, Gi, Bi of the three primary colors shown in the video signal is 256 gradations, respectively, and the number of colors specified by the video signal is 256 X 256 X 256.
- the lookup table in the lookup table memory 22 supports gradations every 16 gradations, such as 0, 16, 32, ..., 256 gradations for each of the luminance Ri, Gi, and Bi. It has 17 X 1 7 X 17 3D matrix data. That is, the lookup table has 17 ⁇ 17 ⁇ 17 data thinned out by 256 ⁇ 256 ⁇ 256! /.
- the interpolation unit 24 uses the data included in the look-up table (luminance of yellow subpixel and cyan subpixel) and yellow subpixel and cyan subpixel corresponding to the thinned gradation. Pixel brightness Ye and C are interpolated. The interpolation unit 24 performs interpolation by linear approximation, for example. In this way, the luminance Ye and C of the yellow sub-pixel and cyan sub-pixel corresponding to the luminances Ri, Gi and Bi of the three primary colors can be obtained for all gradations.
- the calculation unit 23 uses the XYZ values obtained by the color coordinate conversion unit 21 and the luminances Ye and C of the yellow and cyan sub-pixels obtained by the lookup table memory 22 and the interpolation unit 24 to generate red Calculate the luminance R, G, B of the green and blue sub-pixels.
- the color corresponding to the data in the lookup table stored in the lookup table memory 22 is the number of colors specified by the video signal. Therefore, it is possible to reduce the amount of data in the look-up table by using the power S.
- the look-up table includes data indicating the luminance values of the yellow sub-pixel and cyan sub-pixel, and the luminance of the remaining red sub-pixel, green sub-pixel, and blue sub-pixel is calculated by the calculation unit 23.
- the force S described as an example of calculating S, the present invention is not limited to this! /. If data indicating the luminance of any two sub-pixels is included in the lookup table, the arithmetic unit 23 can calculate the luminance of the remaining three sub-pixels.
- the data amount of the lookup table can be reduced.
- the signal conversion circuit 20 obtains the luminance of (n ⁇ 3) primary colors out of the n primary colors by referring to the lookup table when the number of primary colors used for display is n (that is, The look-up table includes luminance data for (n ⁇ 3) primary colors), and (n ⁇ 3) the remaining three of the n primary colors by performing calculations using the luminance of the primary colors. The luminance of each primary color can be calculated.
- the signal conversion circuit 20 obtains the luminance of one sub-pixel by referring to the lookup table, and remains by the calculation of the calculation unit 23.
- the luminance of the three subpixels should be calculated.
- the four subpixels are, for example, a red subpixel, a green subpixel, a blue subpixel, and a yellow subpixel.
- the luminance of the three sub-pixels is obtained by referring to the lookup table, and the luminance of the remaining three sub-pixels is obtained by the calculation unit 23. What is necessary is just to calculate a degree.
- the six subpixels are, for example, a red subpixel, a green subpixel, a blue subpixel, a yellow subpixel, a cyan subpixel, and a magenta subpixel.
- the components included in the signal conversion circuit 20 can be realized by hardware, and some or all of these can also be realized by software.
- this computer which may be configured using a computer, has a central processing unit (CPU) for executing various programs and a program for executing these programs. It is equipped with RAM (random access memory) that functions as a work area. Then, a program for realizing the function of each component is executed on the computer, and this computer is operated as each component.
- CPU central processing unit
- RAM random access memory
- the program may be supplied from the recording medium to the computer, or may be supplied to the computer via a communication network.
- the recording medium may be configured so as to be separable from the computer or incorporated in the computer. This recording medium can be read via a program reading device connected to the computer as an external storage device, even if the recording program code is mounted on the computer so that the computer can directly read the recorded program code. So that it can be worn May be.
- Recording media include, for example, tapes such as magnetic tapes and cassette tapes: magnetic disks such as flexible disks / hard disks, magneto-optical disks such as MO and MD, and optical disks such as CD-ROM, DVD and CD-R Disk: IC card (including memory card), optical card, etc .: or semiconductor memory such as mask ROM, EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), flash ROM, etc.
- the program may take the form of a carrier wave or a data signal in which the program code is embodied by electronic transmission.
- a signal conversion circuit suitably used for a multi-primary color liquid crystal display device.
- the multi-primary color liquid crystal display device provided with the signal conversion circuit according to the present invention can suppress a color shift caused by whitening when observed from an oblique direction, and thus can perform high-quality display. It is suitably used for various electronic devices such as liquid crystal televisions.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Processing Of Color Television Signals (AREA)
- Liquid Crystal (AREA)
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07832193.2A EP2101312B1 (en) | 2006-11-28 | 2007-11-20 | Signal conversion circuit and multiple primary color liquid crystal display device with the circuit |
JP2008546956A JP5043860B2 (ja) | 2006-11-28 | 2007-11-20 | 信号変換回路およびそれを備えた多原色液晶表示装置 |
CN2007800437011A CN101542579B (zh) | 2006-11-28 | 2007-11-20 | 信号变换电路及具有该信号变换电路的多基色液晶显示装置 |
US12/312,747 US8294739B2 (en) | 2006-11-28 | 2007-11-20 | Signal conversion circuit and multiple primary color liquid crystal display device with the circuit |
US13/611,600 US8654116B2 (en) | 2006-11-28 | 2012-09-12 | Signal conversion circuit and multiple primary color liquid crystal display device with the circuit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-320545 | 2006-11-28 | ||
JP2006320545 | 2006-11-28 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/312,747 A-371-Of-International US8294739B2 (en) | 2006-11-28 | 2007-11-20 | Signal conversion circuit and multiple primary color liquid crystal display device with the circuit |
US13/611,600 Continuation US8654116B2 (en) | 2006-11-28 | 2012-09-12 | Signal conversion circuit and multiple primary color liquid crystal display device with the circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008065935A1 true WO2008065935A1 (fr) | 2008-06-05 |
Family
ID=39467727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/072463 WO2008065935A1 (fr) | 2006-11-28 | 2007-11-20 | Circuit de conversion de signaux et dispositif d'affichage à cristaux liquides à couleurs primaires multiples équipé du circuit |
Country Status (5)
Country | Link |
---|---|
US (2) | US8294739B2 (ja) |
EP (1) | EP2101312B1 (ja) |
JP (1) | JP5043860B2 (ja) |
CN (2) | CN102290041A (ja) |
WO (1) | WO2008065935A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010157900A (ja) * | 2008-12-26 | 2010-07-15 | Sanyo Electric Co Ltd | 信号処理装置及び投写型映像表示装置 |
EP2296138A1 (en) * | 2008-05-27 | 2011-03-16 | Sharp Kabushiki Kaisha | Signal conversion circuit, and multiple primary color liquid crystal display device having the circuit |
JPWO2011010637A1 (ja) * | 2009-07-22 | 2012-12-27 | シャープ株式会社 | 液晶表示装置の製造方法 |
US9177527B2 (en) | 2011-07-13 | 2015-11-03 | Sharp Kabushiki Kaisha | Multi-primary color display device |
US9311841B2 (en) | 2011-09-07 | 2016-04-12 | Sharp Kabushiki Kaisha | Multi-primary colour display device |
US9583054B2 (en) | 2012-11-14 | 2017-02-28 | Sharp Kabushiki Kaisha | Multi-primary color display device |
CN108227314A (zh) * | 2016-12-14 | 2018-06-29 | 天马日本株式会社 | 液晶显示设备和控制电路 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8780029B2 (en) * | 2008-09-22 | 2014-07-15 | Sharp Kabushiki Kaisha | Signal conversion circuit, and multiple-primary-color liquid crystal display device provided with same |
KR101344641B1 (ko) | 2009-09-30 | 2013-12-26 | 샤프 가부시키가이샤 | 액정 표시 장치 |
US9202435B2 (en) | 2010-11-30 | 2015-12-01 | Nec Display Solutions, Ltd. | Correction device for display device and correction method for display device |
US9058783B2 (en) | 2011-08-31 | 2015-06-16 | Sharp Kabushiki Kaisha | Liquid-crystal display device |
US10715771B1 (en) | 2016-09-15 | 2020-07-14 | Gerlach Consulting Group, Inc. | Wide-gamut-color image formation and projection |
CN107967900B (zh) * | 2017-12-21 | 2020-09-11 | 惠科股份有限公司 | 显示装置的驱动方法、驱动装置及显示装置 |
CN109215599B (zh) * | 2018-10-22 | 2020-11-24 | 深圳市华星光电技术有限公司 | 一种改善有色人种肤色视角表现的8畴设计方法及系统 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6321907B2 (ja) | 1979-12-25 | 1988-05-10 | Citizen Watch Co Ltd | |
JPH11242225A (ja) | 1997-06-12 | 1999-09-07 | Fujitsu Ltd | 液晶表示装置 |
JP2003043525A (ja) | 2000-08-11 | 2003-02-13 | Sharp Corp | 液晶表示装置 |
JP2004117752A (ja) * | 2002-09-25 | 2004-04-15 | Sharp Corp | 表示装置 |
JP2004529396A (ja) | 2001-06-11 | 2004-09-24 | ゲノア・テクノロジーズ・リミテッド | カラーディスプレイ用の装置、システム、および方法 |
JP2005227408A (ja) * | 2004-02-10 | 2005-08-25 | National Univ Corp Shizuoka Univ | 多原色表示装置に対する色変換方式 |
JP2006304256A (ja) * | 2005-03-24 | 2006-11-02 | Seiko Epson Corp | 画像処理装置及び画像処理方法ならびにそのプログラムと記録媒体 |
WO2007097080A1 (ja) * | 2006-02-27 | 2007-08-30 | Sharp Kabushiki Kaisha | 液晶表示装置 |
Family Cites Families (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4800375A (en) | 1986-10-24 | 1989-01-24 | Honeywell Inc. | Four color repetitive sequence matrix array for flat panel displays |
JP3362758B2 (ja) | 1996-03-15 | 2003-01-07 | 富士ゼロックス株式会社 | 反射型カラー表示装置 |
JP4034022B2 (ja) | 2000-01-25 | 2008-01-16 | シャープ株式会社 | 液晶表示装置 |
JP2001306023A (ja) | 2000-04-18 | 2001-11-02 | Seiko Epson Corp | 画像表示装置 |
JP3712637B2 (ja) | 2000-08-11 | 2005-11-02 | シャープ株式会社 | 液晶表示装置およびその欠陥修正方法 |
JP3999081B2 (ja) * | 2002-01-30 | 2007-10-31 | シャープ株式会社 | 液晶表示装置 |
JP4799823B2 (ja) * | 2002-04-11 | 2011-10-26 | ジェノア・カラー・テクノロジーズ・リミテッド | 属性を向上させるカラー表示装置および方法 |
JP4342200B2 (ja) * | 2002-06-06 | 2009-10-14 | シャープ株式会社 | 液晶表示装置 |
JP4248306B2 (ja) | 2002-06-17 | 2009-04-02 | シャープ株式会社 | 液晶表示装置 |
JP4413515B2 (ja) | 2003-03-31 | 2010-02-10 | シャープ株式会社 | 画像処理方法及びそれを用いた液晶表示装置 |
US8502762B2 (en) | 2003-03-31 | 2013-08-06 | Sharp Kabushiki Kaisha | Image processing method and liquid-crystal display device using the same |
JP2005062833A (ja) | 2003-07-29 | 2005-03-10 | Seiko Epson Corp | カラーフィルタ、カラー画像表示装置および電子機器 |
CN1860524A (zh) * | 2003-09-30 | 2006-11-08 | 皇家飞利浦电子股份有限公司 | 多基色显示系统和使用多基色显示的方法 |
EP1553553A3 (en) | 2004-01-07 | 2008-07-30 | Chi Mei Optoelectronics Corporation | Liquid crystal display driver for compensating viewing angle |
JP4612406B2 (ja) * | 2004-02-09 | 2011-01-12 | 株式会社日立製作所 | 液晶表示装置 |
WO2005076252A1 (ja) * | 2004-02-10 | 2005-08-18 | National University Corporation Shizuoka University | 多原色ディスプレイおよび多原色ディスプレイ用色変換方式 |
TWI278827B (en) * | 2004-05-12 | 2007-04-11 | Seiko Epson Corp | Display equipment and electronic apparatus |
US20060114205A1 (en) * | 2004-11-17 | 2006-06-01 | Vastview Technology Inc. | Driving system of a display panel |
JP2006220714A (ja) * | 2005-02-08 | 2006-08-24 | Fuji Photo Film Co Ltd | 液晶ディスプレイ装置及びその表示制御方法並びに液晶ディスプレイ装置の表示制御用プログラム |
CN1882103B (zh) * | 2005-04-04 | 2010-06-23 | 三星电子株式会社 | 实现改进的色域对映演算的系统及方法 |
WO2006109577A1 (ja) | 2005-04-05 | 2006-10-19 | Sharp Kabushiki Kaisha | カラーフィルタ基板及び表示装置 |
CN101180889B (zh) | 2005-05-23 | 2011-08-10 | 皇家飞利浦电子股份有限公司 | 具有减小的串扰的光谱序列显示器 |
US20070035536A1 (en) * | 2005-08-11 | 2007-02-15 | Eastman Kodak Company | Display calibration method for optimum angular performance |
CN101449589A (zh) | 2006-05-15 | 2009-06-03 | 夏普株式会社 | 彩色图像显示设备和色彩变换设备 |
EP1990578A1 (de) | 2007-05-08 | 2008-11-12 | ALSTOM Technology Ltd | Gasturbine mit Wassereinspritzung |
US8780029B2 (en) * | 2008-09-22 | 2014-07-15 | Sharp Kabushiki Kaisha | Signal conversion circuit, and multiple-primary-color liquid crystal display device provided with same |
-
2007
- 2007-11-20 EP EP07832193.2A patent/EP2101312B1/en not_active Not-in-force
- 2007-11-20 US US12/312,747 patent/US8294739B2/en not_active Expired - Fee Related
- 2007-11-20 JP JP2008546956A patent/JP5043860B2/ja not_active Expired - Fee Related
- 2007-11-20 CN CN2011102864029A patent/CN102290041A/zh active Pending
- 2007-11-20 CN CN2007800437011A patent/CN101542579B/zh not_active Expired - Fee Related
- 2007-11-20 WO PCT/JP2007/072463 patent/WO2008065935A1/ja active Application Filing
-
2012
- 2012-09-12 US US13/611,600 patent/US8654116B2/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6321907B2 (ja) | 1979-12-25 | 1988-05-10 | Citizen Watch Co Ltd | |
JPH11242225A (ja) | 1997-06-12 | 1999-09-07 | Fujitsu Ltd | 液晶表示装置 |
JP2003043525A (ja) | 2000-08-11 | 2003-02-13 | Sharp Corp | 液晶表示装置 |
JP2004529396A (ja) | 2001-06-11 | 2004-09-24 | ゲノア・テクノロジーズ・リミテッド | カラーディスプレイ用の装置、システム、および方法 |
JP2004117752A (ja) * | 2002-09-25 | 2004-04-15 | Sharp Corp | 表示装置 |
JP2005227408A (ja) * | 2004-02-10 | 2005-08-25 | National Univ Corp Shizuoka Univ | 多原色表示装置に対する色変換方式 |
JP2006304256A (ja) * | 2005-03-24 | 2006-11-02 | Seiko Epson Corp | 画像処理装置及び画像処理方法ならびにそのプログラムと記録媒体 |
WO2007097080A1 (ja) * | 2006-02-27 | 2007-08-30 | Sharp Kabushiki Kaisha | 液晶表示装置 |
Non-Patent Citations (2)
Title |
---|
M. R. POINTER: "The gamut of real surface colors", COLOR RESEARCH AND APPLICATION, vol. 5, no. 3, 1980, pages 145 - 155, XP009149624, DOI: doi:10.1002/col.5080050308 |
See also references of EP2101312A4 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2296138A1 (en) * | 2008-05-27 | 2011-03-16 | Sharp Kabushiki Kaisha | Signal conversion circuit, and multiple primary color liquid crystal display device having the circuit |
EP2296138A4 (en) * | 2008-05-27 | 2011-09-21 | Sharp Kk | SIGNAL CONVERTING CIRCUIT, AND MULTI-PRIMARY COLOR LIQUID CRYSTAL DISPLAY DEVICE EQUIPPED WITH THE CIRCUIT |
JP2010157900A (ja) * | 2008-12-26 | 2010-07-15 | Sanyo Electric Co Ltd | 信号処理装置及び投写型映像表示装置 |
JPWO2011010637A1 (ja) * | 2009-07-22 | 2012-12-27 | シャープ株式会社 | 液晶表示装置の製造方法 |
US9177527B2 (en) | 2011-07-13 | 2015-11-03 | Sharp Kabushiki Kaisha | Multi-primary color display device |
US9311841B2 (en) | 2011-09-07 | 2016-04-12 | Sharp Kabushiki Kaisha | Multi-primary colour display device |
US9583054B2 (en) | 2012-11-14 | 2017-02-28 | Sharp Kabushiki Kaisha | Multi-primary color display device |
CN108227314A (zh) * | 2016-12-14 | 2018-06-29 | 天马日本株式会社 | 液晶显示设备和控制电路 |
Also Published As
Publication number | Publication date |
---|---|
CN101542579B (zh) | 2011-11-09 |
JP5043860B2 (ja) | 2012-10-10 |
US8654116B2 (en) | 2014-02-18 |
US20130010213A1 (en) | 2013-01-10 |
CN101542579A (zh) | 2009-09-23 |
EP2101312A1 (en) | 2009-09-16 |
CN102290041A (zh) | 2011-12-21 |
EP2101312A4 (en) | 2010-10-27 |
US20100053235A1 (en) | 2010-03-04 |
US8294739B2 (en) | 2012-10-23 |
JPWO2008065935A1 (ja) | 2010-03-04 |
EP2101312B1 (en) | 2016-11-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5043860B2 (ja) | 信号変換回路およびそれを備えた多原色液晶表示装置 | |
JP5244174B2 (ja) | 信号変換回路およびそれを備えた多原色液晶表示装置 | |
JP5395092B2 (ja) | 表示装置 | |
JP4805339B2 (ja) | 液晶表示装置 | |
JP5593920B2 (ja) | 液晶表示装置 | |
JP4913161B2 (ja) | 多原色表示装置 | |
JP5426559B2 (ja) | 多原色液晶表示装置 | |
JP5863925B2 (ja) | 制御装置及び制御方法 | |
WO2014038517A1 (ja) | 多原色表示装置 | |
WO2010061577A1 (ja) | 多原色液晶表示装置および信号変換回路 | |
US20140210878A1 (en) | A method of processing image data for display on a display device, which comprising a multi-primary image display panel | |
WO2012005170A1 (ja) | 多原色液晶表示装置 | |
WO2013031770A1 (ja) | 液晶表示装置 | |
WO2012090880A1 (ja) | 信号変換回路およびそれを備えた多原色液晶表示装置 | |
JP5485366B2 (ja) | 表示装置 | |
WO2008012969A1 (fr) | Dispositif d'affichage à couleurs d'origine multiples | |
JP2014048583A (ja) | 多原色液晶表示装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200780043701.1 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07832193 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008546956 Country of ref document: JP |
|
REEP | Request for entry into the european phase |
Ref document number: 2007832193 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2007832193 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12312747 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |