WO2004066247A1 - フラットディスプレイ装置及び携帯端末装置 - Google Patents
フラットディスプレイ装置及び携帯端末装置 Download PDFInfo
- Publication number
- WO2004066247A1 WO2004066247A1 PCT/JP2003/016864 JP0316864W WO2004066247A1 WO 2004066247 A1 WO2004066247 A1 WO 2004066247A1 JP 0316864 W JP0316864 W JP 0316864W WO 2004066247 A1 WO2004066247 A1 WO 2004066247A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gradation
- circuit
- display unit
- display device
- setting
- 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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
-
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0281—Arrangement of scan or data electrode driver circuits at the periphery of a panel not inherent to a split matrix structure
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
-
- 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
Definitions
- the present invention relates to a flat display device and a portable terminal device, and can be applied to, for example, a liquid crystal display device, a PDA (Personal Digital Assisiants) using the liquid crystal display device, a mobile phone, and the like.
- a liquid crystal display device for example, a liquid crystal display device, a PDA (Personal Digital Assisiants) using the liquid crystal display device, a mobile phone, and the like.
- a grayscale setting circuit for green along one of the opposite sides of the display unit and arranging grayscale setting circuits for red and blue along the other side, compared to the conventional art, To reduce power consumption and narrow the frame.
- liquid crystal display devices which are flat display devices applied to portable terminal devices such as PDAs and mobile phones, have been provided with a driving circuit for the liquid crystal display panel on a glass plate which is an insulating substrate constituting the liquid crystal display panel. Are provided so as to be integrated with each other.
- FIG. 1 is a plan view showing this type of liquid crystal display device.
- each pixel is formed by a liquid crystal cell, a polysilicon TFT (Thin Film Transistor) as a switching element of the liquid crystal cell, and an auxiliary capacitor, and the pixels are arranged in a matrix.
- the display unit 2 having a rectangular shape is formed.
- horizontal driving circuits 3 and 4 are formed along the upper and lower sides of the display unit 2 facing each other, and the vertical driving is performed along one of the remaining two sides extending in the vertical direction. Circuit 5 is formed.
- the horizontal drive circuits 3 and 4 set the gradation of the pixels forming the odd columns and the even columns of the display unit 2, respectively. That is, in the liquid crystal display device 1, the gradation data D1 and D2 for the odd-numbered columns and the even-numbered columns are input in the raster running order via the input unit 6 formed at the upper end, respectively. , 4 sequentially and cyclically latch the image data by a plurality of latches corresponding to the arrangement of pixels in the line direction in the sampling latches 3A and 4A. As a result, the horizontal drive circuits 3 and 4 The grayscale data D1 and D2 input in the star scanning order are temporarily separated and held in the sampling latches 3A and 4A in units of lines.
- the second latches 3B and 4B latch the latch results of the respective latches constituting the sampling latches 3A and 4A simultaneously and in parallel at the cycle of horizontal scanning, whereby the gradation in line units is thus obtained.
- the data D 1 and D 2 are collected in units of lines and output to the level switches 3 C and 4 C.
- the level shifters 3 C and 4 C use the following digital-to-analog converter (DAC): Conductive (N-channel / P-channel) MOS (Metal Oxide Semiconductor) transistors that make up 3D and 4D.
- DAC digital-to-analog converter
- MOS Metal Oxide Semiconductor
- the grayscale data Dl, D ⁇ output simultaneously and in parallel by the second latches 3B, 4B are shifted and output so that they can be driven.
- Subsequent digital-to-analog conversion circuits 3D and 4D generate and output drive voltages corresponding to these gradation data Dl and D2, respectively.
- the horizontal drive circuits 3 and 4 supply a plurality of dynamic voltages formed in this way to the column lines (column lines) of the display unit 2, so that each column line has an odd column and an even number, respectively. With respect to the columns, the driving voltage corresponding to the gradation data Dl and D2 of the picture continuously in the vertical direction is sequentially and cyclically
- the row lines (row lines) of the display unit 2 are sequentially selected in accordance with the setting of the drive voltage in the column lines, and the TFT of the corresponding pixel is set to the ON state.
- the liquid crystal display device 1 can display a desired image based on the gradation data Dl and D2.
- each gradation by the gradation data Dl and D2 is used.
- a digital-to-analog conversion circuit 3 D by a method of generating a drive voltage (a so-called reference voltage selection type) is used. 4D is being adopted.
- the reference voltage generating circuit 7 for generating the reference voltages of the plurality of systems is provided on the remaining side of the display unit 2.
- the reference voltage is supplied from the base voltage generating circuit 7, thereby preventing the reference voltage from being varied between the odd-numbered row and the even-numbered row, and effectively causing vertical streaks and the like due to this variation. Have been made to avoid.
- FIG. 3 is a connection diagram showing digital-to-analog conversion circuits 3D and 4D based on the reference voltage selection type.
- the digital-to-analog converter circuits 3D and 4D are serial circuits C0 to C63, each of which is a switch circuit that operates on and off according to the logical value of each bit b0 to b5 of the gradation data D1 and D2.
- Each of the it column circuits C0 to C63 is supplied with one reference voltage V0 V63, respectively, and the other ends of these series circuits CO to C63 are connected to the column line OUT. . Note that FIG.
- FIG. 3 shows a case where the gradation data Dl and D2 are 6 bits, and the switch circuit is formed by a conductive type (N-channel ZP-channel) MOS transistor, and the value of the gradation data D1 The N channel and the P channel are arranged so that a corresponding reference voltage can be selected according to the condition.
- the digital-to-analog conversion circuits 3D and 4D select and output the reference voltages V0 to V63 according to the gradation data Dl and D2.
- FIG. 4 is a connection diagram showing each transistor replaced by a switch.
- the other ends of the series circuits C0 to C63 for selecting the reference voltages V0 to V63 are connected to the column line OUT of the display unit 2.
- the column line OUT is orthogonal to the side on which the horizontal drive circuits 3 and 4 are arranged, and is extended in the direction so that these series circuits C 0 are arranged side by side in the vertical direction, which is the orthogonal direction.
- To C63 are arranged to form a block B of series circuits C0 to C63 corresponding to one pixel (fourth).
- the block B is arranged so as to be continuous in the horizontal direction along the side of the display section 2 on which the horizontal drive circuits 3 and 4 are arranged.
- the reference voltages V0 to V63 are set so as to be commonly used in the horizontally continuous block B by the wiring extending in the horizontal direction. The space on the board is efficiently used.
- the blocks B continuous in the horizontal direction are formed.
- the block B is arranged at a pitch twice as large as the pixel repetition pitch P.
- the block B of the serial circuit is sequentially arranged corresponding to the repetition of the pixels for red, blue, and green, and the reference voltages VO to V63 are commonly supplied to these blocks B.
- NXNXN colors can be displayed.
- N 2n
- D2 has 6 bits, it is possible to represent about 260,000 colors.
- a portable terminal device or the like is not required to have such a high color expression capability as high as 260,000 colors.
- the present invention has been made in view of the above points, and has as its object to propose a flat display device capable of reducing the power consumption and narrowing the frame as compared with the related art, and a portable terminal device using the flat display device. .
- a display unit having pixels arranged in a matrix and a driving circuit for driving the pixels of the display unit are integrally formed on a substrate.
- the first gradation setting circuit that sets the gradation of the green pixel of the display section of the driving circuit is arranged along one side of the display section, and applied to one side of the display section.
- a second gradation setting circuit for setting the gradation of the red and blue pixels of the display portion of the driving circuit is arranged along the other side of the display portion facing the same.
- the first gradation setting circuit for setting the tone of the green pixel of the display unit is arranged along one side of the display unit, and the display unit facing the one side is arranged.
- the second gradation setting circuit for setting the gradation of the red and blue pixels of the display portion of the driving circuit is arranged, so that the number of gradations to be set for the green pixel.
- the first and second gradation setting circuits can be configured according to the number of gradations to be set for the red and yellow pixels, respectively.
- a desired image is displayed by a flat display device in which a display unit having pixels arranged in a matrix and a drive circuit for driving the pixels of the display unit are integrally formed on a substrate.
- this flat display device includes a first gradation setting circuit for setting a gradation of a green pixel of a display portion of a driving circuit along one side of the display portion.
- a second gradation setting circuit for setting the gradations of the red and blue pixels of the display unit in the driving circuit is arranged. .
- FIG. 1 is a plan view showing a conventional liquid crystal display device.
- FIG. 2 is a plan view for explaining the arrangement of the reference voltage generating circuit.
- FIG. 3 is a connection diagram showing a digital-to-analog conversion circuit in the liquid crystal display device of FIG.
- FIG. 4 is a connection diagram in which each transistor in FIG. 3 is replaced by a switch.
- FIG. 5 is a block diagram showing a portable terminal device using a liquid crystal display unit according to the first embodiment of the present invention.
- FIG. 6 is a plan view showing a liquid crystal display unit in the portable terminal device of FIG.
- FIG. 7 is a connection diagram for explaining the digital-to-analog conversion circuit 20AD of the horizontal drive circuit 2OA in the liquid crystal display unit in FIG.
- FIG. 8 is a connection diagram for explaining the digital-to-analog conversion circuit 20BD of the horizontal drive circuit 20B in the liquid crystal display section of FIG.
- FIG. 9 is a plan view showing a portable terminal device using a liquid crystal display unit according to a second embodiment of the present invention.
- FIG. 5 is a block diagram showing an image display unit of the mobile terminal device according to the embodiment of the present invention.
- the mobile terminal device is, for example, a mobile phone, a PDA, or the like, and displays a desired image on the image display unit 11. Therefore, in the image display section 11, the image data DR, DG, and DB are stored in the image memory built in the image processing HI path 12, and the image data DR, DG, and DB are sequentially stored in the liquid crystal display device 13. Output.
- the master clock MCK vertical synchronization signal VSYNC, and horizontal synchronization signal HS YNC are output in synchronization with the output of the image data DR, DG, and DB.
- This portable terminal device inputs these image data DR, DG, DB, master clock MCK, vertical synchronization signal VSYNC, and horizontal synchronization signal HSYNC to a built-in liquid crystal display device 13, and the liquid crystal display device 13 displays an image. Is displayed.
- the liquid crystal display device 13 is formed by integrally forming a display section 14 in which pixels are arranged in a matrix and a drive circuit 15 for driving the pixels of the display section 14 on a glass substrate.
- the pixels of the display section 14 are composed of a liquid crystal cell, a polysilicon TFT for switching this liquid crystal cell, and an auxiliary capacitor.
- the drive circuit 15 inputs the master clock MCK :, the vertical synchronization signal VSYNC, and the horizontal synchronization signal HS YNC via the interface (IF) 16 to the timing generator (TG) 17, where various Generates a timing signal for operation reference.
- the DC-DC converter (DDC) 21 is operated by a predetermined timing signal generated by the timing generator 17 and is required for the operation of each part from the power supply VDD supplied to the liquid crystal display 13. Power supplies VDD 2, VVS S 2, HVS S 2 etc.
- the vertical drive circuit 18 is operated by a predetermined timing signal generated by the timing generator 17 and outputs a selection signal for selecting a line of the display unit 14.
- the reference voltage generation circuit 19 generates a reference voltage necessary for the processing of the horizontal drive circuit 20, and the horizontal drive circuit 20 generates the reference voltage of the corresponding pixel of the display unit 14 based on the gradation data by the image data DR, DG, and DB. Set the gradation.
- FIG. 6 is a plan view showing in detail the configurations of the horizontal drive circuit 20, vertical drive circuit 18 and display section 14 of the liquid crystal display device 13.
- image data DR and DB representing red and blue gradations are inputted by 5 bits
- image data DG representing green gradations are inputted by 6 bits.
- the horizontal drive circuit 20 includes a horizontal drive circuit 20A for red and blue, and a horizontal drive circuit 20B for green.
- the red and blue horizontal drive circuits 2 OA are arranged on the upper side of the display unit 14 along the side extending in the horizontal direction, whereas the green horizontal drive circuit 20 B is provided in this horizontal drive circuit.
- the lower side of the display unit 14 facing the side where the drive circuit 2OA is disposed is arranged along the side extending in the horizontal direction.
- a grayscale setting circuit for setting the grayscale of the display unit 14 with 5-bit grayscale data DR and DB is used in the liquid crystal display device 13.
- the horizontal drive circuit 2OA and the 6-bit grayscale data is arranged along the top and bottom of the display unit 14 so that unnecessary configuration is omitted, and the corresponding consumption It is designed to reduce the amount of electricity and make the frame narrower.
- the horizontal drive circuit 2OA for red and blue is used for the image data DR to be processed.
- the point that the grayscale data that is DB is for red and blue, the point that the whole is configured to correspond to 5-bit grayscale data, and the drive signal that corresponds to the pixels for red and blue
- the configuration is the same as that of the horizontal drive circuit 3 described above with reference to FIG. 1, except that the connection to the column line is set so as to output to the display unit 14.
- This also allows the reference voltage generation circuit 19 to thin out the reference signals VO B to V 63 B output to the 6-bit horizontal drive circuit 20 B and to provide the reference signals V 0 A to V to the 5-bit horizontal drive circuit 20 A. Outputs V 31 A.
- the horizontal drive circuit 2OA sequentially and cyclically circulates the 5-bit red and blue image data DR and DB, which are input in the order of the sequential raster scan, by a plurality of latches constituting the sampling latch 20AA.
- the second latch 2 OAB latches the results of the plurality of latches simultaneously and in parallel on a line-by-line basis.
- the signal level of each bit is level-shifted by the subsequent level shifter 20 AC, and analog-to-digital conversion processing is performed by the digital-to-analog conversion circuit (DAC) 2 OAD.
- DAC digital-to-analog conversion circuit
- the horizontal drive circuit 2OA generates a drive signal OUT for setting the gradation of the red and blue pixels of the display unit 14 on a line basis, whereby the red and blue pixels of the display unit 14 are generated.
- a second gradation setting circuit for setting the gradation of the image.
- the sampling latch 2 OAA, the second latch 2 OAB, the level shifter 20AC, the digital-analog conversion circuit compared to the horizontal drive circuit 3 arranged above the display unit 2 in FIG. 1.
- the number of bits to be processed by the DAC (2) OAD can be reduced, and the configuration is simplified, the frame is narrowed, and the power consumption is reduced.
- FIG. 7 is a connection diagram showing a configuration of the digital-to-analog conversion circuit 20AD of the horizontal drive circuit 2OA.
- the P-channel and N-channel conductive MOS transistors constitute a switch circuit that operates on and off according to the logical value of each bit of the gradation data DR and DB.
- a plurality of (in this case, 32) serial circuits C0 to C31 of the switch circuits are arranged in correspondence with the gradation by the horizontal drive circuit 2OA.
- One end of the series circuit CO-C31 is connected to the corresponding reference voltage VOA-V31A.
- the other end is connected to a comb line, so that the horizontal drive circuit 2OA selects a reference voltage corresponding to each gradation from the corresponding series circuit based on the gradation data, and selects the gradation of the pixel. It is set to be set.
- the series circuits CO to C31 are sequentially arranged in the extending direction of the column line to form a block B corresponding to each pixel. In this embodiment, when processing gradation data of 6 bits, While 64 series circuits are required to constitute this pack B, in this embodiment 32 bits are sufficient with 5 bits, so that the upper part of the display unit 14 can be significantly narrowed. It has been made.
- the horizontal drive circuit 20A can process the odd-numbered columns or the even-numbered columns in comparison with the case where the odd-numbered columns or even-numbered columns are processed.
- the horizontal arrangement is dense. In other words, when processing is performed using odd columns or even columns, as shown in FIG. 4, it is necessary to arrange each block B with a period twice as long as the horizontal repetition period of the liquid crystal cell. When the repetition period is 80 m], it is necessary to create block B with a width of 160 [ ⁇ m) or less.
- the horizontal driving circuit 20 for green is configured to sequentially process the 6-bit green image data DG to generate the driving signal OUT corresponding to the green pixel. That is, the horizontal drive circuit 20B sequentially and cyclically latches the 6-bit green image data DG input in the order of the sequential raster scan with a plurality of latches constituting the sampling latch 2OBA. The result is latched by the second latch 20BB in parallel and in line units.
- Another level shifter 20 B Another level shifter 20 B
- the signal level of each bit is shifted by C, and the digital-to-analog conversion circuit (DAC) performs analog-to-digital conversion processing with the 20 BD.
- DAC digital-to-analog conversion circuit
- the drive circuit 2 OB is configured to generate a drive signal OUT for setting the gray level of the green pixel of the display unit on a line-by-line basis, whereby the first signal for setting the gray level of the green pixel of the display unit is generated.
- a horizontal drive circuit is configured.
- the number of pixels to be driven is smaller in the odd-numbered column than in the case of processing the even-numbered column.
- the horizontal alignment is coarse.
- the rough horizontal arrangement is used for narrowing the frame.
- FIG. 8 is a connection diagram showing the digital / analog conversion Hi path 20BD of the green horizontal drive circuit 20B.
- the digital-to-analog conversion circuit 20BD similarly to the digital-to-analog conversion circuit 20AD, a switch circuit that performs on / off operation by the logical value of each bit of the gradation data DG by using P-channel and N-channel conductive MOS transistors.
- a plurality of (in this case, 64) series circuits CO to C 63 of the switch circuit are arranged in correspondence with the gray scale by the horizontal drive circuit 2OA.
- each of the series circuits CO to C63 is connected to the corresponding reference voltage V0A to V63A, and the other end is connected to a column line.
- the horizontal drive circuit 20B also has a configuration based on the gradation data DG.
- the gradations of the pixels are set by selecting the reference voltages VO A to V 63 A corresponding to each gradation by the corresponding series circuits C 0 to C 63.
- a pair of series circuits C0 and C1,..., C62 and C63 are arranged so as to be arranged in a horizontal direction with a column line interposed therebetween.
- C62, and C63 are arranged in the extending direction of the column line to form a block B corresponding to a pixel.
- the pair of series circuits arranged in the horizontal direction is set as a series circuit for selecting an adjacent reference furnace pressure.
- the horizontal drive circuit 20B outputs the 5-bit grayscale data DR and DB, despite outputting a 64-grayscale drive signal based on 6-bit grayscale data DG.
- Drive circuit 2 Like the digital-to-analog conversion circuit 20OA of OA, the common line is formed in such a manner that 32 series circuits are arranged in a row in the extension direction of the common line. Small amount It is made to be able to rim.
- image data related to an image obtained by accessing a homepage, image data obtained through an imaging unit, and the like are built in the image processing circuit 12.
- the image data stored in the image memory is input to the liquid crystal display device 13 together with a synchronization signal and the like.
- the image data is output after the green image data DG is acquired in 6 bits and stored in the image memory, while the red and blue image data DR and DB are 5 bits.
- the portable terminal device processes the image data with the number of bits corresponding to the gradation sufficient for displaying the image data, and outputs the image data.
- the configuration of a series of processing systems can be simplified.
- the input image data DR, DG, and DB are converted into drive signals corresponding to the gradation of each pixel by the horizontal drive circuit 20 and output to the display unit 14.
- this drive signal is supplied to the pixel of the corresponding line, whereby an image is displayed on the display unit 14 by the image data DR, DG, and DB.
- the red and blue image data DR and DB of 5 bits out of the image data DR, DG, and DB are displayed as shown in FIG.
- the horizontal drive circuit 2 OA arranged along the upper side of the unit 14 collectively processes and generates drive signals for the corresponding pixels, whereas the remaining 6 bits of green image data DG
- the horizontal drive circuits 20B arranged along the upper side collectively process and generate drive signals for the corresponding pixels.
- the horizontal drive circuit 2 OA on the upper side of the display unit 14 can be configured to correspond to 5 bits, and correspondingly, unnecessary configuration is omitted to reduce power consumption.
- the frame can be narrowed (Fig. 7).
- a plurality of series circuits of switch circuits each of which is turned on and off by a logical value of each bit of image data which is gradation data indicating gradation is provided in correspondence with the gradation. And place it in the gradation data
- the reference voltage corresponding to each tone is selected by the corresponding series circuit to set the pixel level, and this series circuit is arranged in a direction orthogonal to one upper side of the display unit 14.
- a block B corresponding to one pixel is formed, and the block B is arranged side by side in a direction along one side of the pixel B.
- the frame can be narrowed.
- the upper horizontal driving circuit 2OA uses the red and blue image data DR and DB for two systems. In contrast to processing, processing one line of image data DG using green color allows room in the horizontal direction.
- a series circuit for selecting a corresponding reference voltage based on gradation data is arranged in a horizontal direction.
- a unit is formed by a series circuit of pairs, and the units are arranged side by side in the direction of extension of the column lines to form a block B corresponding to one pixel, and the blocks B are arranged side by side in the horizontal direction.
- the number of stages of the series circuit constituting the block can be reduced to one conventional 2 and the frame can be narrowed.
- each horizontal drive circuit 20A, 20B can be set to correspond to the number of bits of image data, and waste can be omitted, and power consumption can be reduced by that much, The frame can be narrowed.
- the horizontal drive circuits 20A and 20B are set so as to correspond to the number of bits of image data, thereby eliminating waste and reducing power consumption and narrowing the frame as compared with the conventional case.
- the green horizontal driving circuit 20B a series circuit composed of switches for selecting a reference voltage is arranged in a horizontal direction to form a unit composed of a pair of series circuits.
- the green horizontal drive circuit 20B side By arranging the cutouts side by side in the direction of extension of the column line to form a block B corresponding to one pixel, the green horizontal drive circuit 20B side also has a narrower frame. be able to.
- FIG. 9 is a plan view showing a liquid crystal display device 33 applied to a portable terminal device according to a second embodiment of the present invention in comparison with FIG.
- the reference signals VOA to V31A corresponding to the gray scale of 5 bits are generated by the reference voltage generation circuit 19A arranged close to the horizontal drive circuit 2OA of 5 bits.
- a reference voltage generating circuit 19B arranged in close proximity to the 6-bit horizontal drive circuit 20B generates base signals VOB to V63B corresponding to 6-bit gray scales to generate a horizontal drive circuit 2B.
- Supply to 0 B the configuration is the same as that of the first embodiment except that the configurations of the reference voltage generation circuits 19 and 19B related to the generation of the reference signal are different.
- the reference voltage is generated by the reference voltage generation circuits arranged close to the horizontal drive circuits 2OA and 20B, respectively, thereby eliminating the wiring space related to the routing of the reference voltage.
- the frame can be narrowed in the horizontal direction.
- the horizontal drive circuits 2OA and 20B respectively correspond to the pixels of red, blue, and green, so that a dedicated reference voltage generation circuit is provided as described above, and the reference voltage varies.
- the present invention is not limited to this. , Can be widely applied. In this case, it can be widely applied even when the number of bits is different between blue and red.
- the present invention is not limited to this, and can be widely applied to flat display devices in which pixels are formed by various display means.
- a gradation setting circuit for green is arranged along one of the opposite sides of the display unit, and a gradation setting circuit for red and blue is arranged along the other.
- the present invention relates to a flat display device and a mobile terminal device, and can be applied to, for example, a liquid crystal display device, a PDA using the liquid crystal display device, a mobile phone, and the like.
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)
- Liquid Crystal (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/541,095 US7420532B2 (en) | 2003-01-22 | 2003-12-26 | Flat display apparatus and portable terminal apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-13461 | 2003-01-22 | ||
JP2003013461A JP4085323B2 (ja) | 2003-01-22 | 2003-01-22 | フラットディスプレイ装置及び携帯端末装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004066247A1 true WO2004066247A1 (ja) | 2004-08-05 |
Family
ID=32767359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/016864 WO2004066247A1 (ja) | 2003-01-22 | 2003-12-26 | フラットディスプレイ装置及び携帯端末装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7420532B2 (ja) |
JP (1) | JP4085323B2 (ja) |
KR (1) | KR101008003B1 (ja) |
CN (1) | CN100476910C (ja) |
TW (1) | TWI267813B (ja) |
WO (1) | WO2004066247A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100670137B1 (ko) * | 2004-10-08 | 2007-01-16 | 삼성에스디아이 주식회사 | 디지털/아날로그 컨버터와 이를 이용한 표시 장치 및 그표시 패널과 구동 방법 |
KR100658619B1 (ko) | 2004-10-08 | 2006-12-15 | 삼성에스디아이 주식회사 | 디지털/아날로그 컨버터와 이를 이용한 표시 장치 및 그표시 패널과 구동 방법 |
JP4492334B2 (ja) | 2004-12-10 | 2010-06-30 | ソニー株式会社 | 表示装置および携帯端末 |
JP2007193237A (ja) * | 2006-01-20 | 2007-08-02 | Sony Corp | 表示装置および携帯端末 |
KR101000288B1 (ko) | 2008-07-08 | 2010-12-13 | 주식회사 실리콘웍스 | 감마전압생성기 및 상기 감마전압생성기를 구비하는 dac |
JP4947167B2 (ja) * | 2010-02-19 | 2012-06-06 | ソニー株式会社 | 表示装置および携帯端末 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07260857A (ja) * | 1994-03-18 | 1995-10-13 | Fujitsu Ltd | 液晶表示装置の駆動回路および液晶表示装置 |
JPH0850273A (ja) * | 1995-08-10 | 1996-02-20 | Seiko Epson Corp | カラー液晶表示装置 |
JPH08184813A (ja) * | 1994-12-27 | 1996-07-16 | Sharp Corp | 液晶表示装置 |
US20010028336A1 (en) * | 2000-04-06 | 2001-10-11 | Seiji Yamagata | Semiconductor integrated circuit for driving liquid crystal panel |
US20020060656A1 (en) * | 2000-11-20 | 2002-05-23 | Nec Corporation | Driving circuit and driving method of color liquid crystal display, and color liquid crystal display device |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5228120A (en) * | 1989-10-12 | 1993-07-13 | International Business Machines Corporation | Display system with direct color mode |
JPH08334740A (ja) | 1995-06-09 | 1996-12-17 | Matsushita Electric Ind Co Ltd | 補助液晶駆動制御装置および液晶表示装置 |
US6441758B1 (en) * | 1997-11-27 | 2002-08-27 | Semiconductor Energy Laboratory Co., Ltd. | D/A conversion circuit and semiconductor device |
JP4576648B2 (ja) | 1998-12-21 | 2010-11-10 | ソニー株式会社 | 液晶表示装置 |
TW521223B (en) * | 1999-05-17 | 2003-02-21 | Semiconductor Energy Lab | D/A conversion circuit and semiconductor device |
JP2000356782A (ja) | 1999-06-16 | 2000-12-26 | Matsushita Electric Ind Co Ltd | 液晶表示装置及びそれを用いた画像表示機器 |
TW482992B (en) * | 1999-09-24 | 2002-04-11 | Semiconductor Energy Lab | El display device and driving method thereof |
KR100339021B1 (ko) | 2000-07-27 | 2002-06-03 | 윤종용 | 평판 디스플레이 장치 |
JP3875470B2 (ja) * | 2000-08-29 | 2007-01-31 | 三星エスディアイ株式会社 | ディスプレイの駆動回路及び表示装置 |
JP4062876B2 (ja) * | 2000-12-06 | 2008-03-19 | ソニー株式会社 | アクティブマトリクス型表示装置およびこれを用いた携帯端末 |
JP4986334B2 (ja) * | 2001-05-07 | 2012-07-25 | ルネサスエレクトロニクス株式会社 | 液晶表示装置及びその駆動方法 |
JP3866606B2 (ja) * | 2002-04-08 | 2007-01-10 | Necエレクトロニクス株式会社 | 表示装置の駆動回路およびその駆動方法 |
KR100434504B1 (ko) * | 2002-06-14 | 2004-06-05 | 삼성전자주식회사 | R, g, b별 독립적인 계조 전압을 사용하는 액정 표시장치 구동용 소오스 드라이버 집적회로 |
-
2003
- 2003-01-22 JP JP2003013461A patent/JP4085323B2/ja not_active Expired - Fee Related
- 2003-12-26 US US10/541,095 patent/US7420532B2/en not_active Expired - Fee Related
- 2003-12-26 CN CNB2003801090043A patent/CN100476910C/zh not_active Expired - Fee Related
- 2003-12-26 KR KR1020057012892A patent/KR101008003B1/ko not_active IP Right Cessation
- 2003-12-26 WO PCT/JP2003/016864 patent/WO2004066247A1/ja active Application Filing
-
2004
- 2004-01-19 TW TW093101423A patent/TWI267813B/zh not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07260857A (ja) * | 1994-03-18 | 1995-10-13 | Fujitsu Ltd | 液晶表示装置の駆動回路および液晶表示装置 |
JPH08184813A (ja) * | 1994-12-27 | 1996-07-16 | Sharp Corp | 液晶表示装置 |
JPH0850273A (ja) * | 1995-08-10 | 1996-02-20 | Seiko Epson Corp | カラー液晶表示装置 |
US20010028336A1 (en) * | 2000-04-06 | 2001-10-11 | Seiji Yamagata | Semiconductor integrated circuit for driving liquid crystal panel |
US20020060656A1 (en) * | 2000-11-20 | 2002-05-23 | Nec Corporation | Driving circuit and driving method of color liquid crystal display, and color liquid crystal display device |
Also Published As
Publication number | Publication date |
---|---|
TWI267813B (en) | 2006-12-01 |
US20060164353A1 (en) | 2006-07-27 |
JP2004226620A (ja) | 2004-08-12 |
US7420532B2 (en) | 2008-09-02 |
KR20050093824A (ko) | 2005-09-23 |
KR101008003B1 (ko) | 2011-01-14 |
CN100476910C (zh) | 2009-04-08 |
JP4085323B2 (ja) | 2008-05-14 |
TW200428327A (en) | 2004-12-16 |
CN1739132A (zh) | 2006-02-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101236484B1 (ko) | 표시장치 및 휴대단말 | |
KR100613325B1 (ko) | 구동 장치 및 표시 모듈 | |
US6791539B2 (en) | Display, method for driving the same, and portable terminal | |
US20060193002A1 (en) | Drive circuit chip and display device | |
US20130063499A1 (en) | Display device, driving method of display device, and electronic apparatus | |
KR20080082897A (ko) | 표시용 구동 회로 | |
KR20010051005A (ko) | 고선명 액정 표시 장치 | |
JP2004341251A (ja) | 表示制御回路及び表示駆動回路 | |
CN100356417C (zh) | 数据驱动器及电子光学装置 | |
JP2008512717A (ja) | マトリクス型lcdパネルを駆動するための装置及びそれに基づく液晶ディスプレイ | |
US20120120040A1 (en) | Drive Device For Display Circuit, Display Device, And Electronic Apparatus | |
KR20000057912A (ko) | 구동회로 일체형 액정표시장치 | |
US20070229553A1 (en) | Display device having an improved video signal drive circuit | |
CN101405640A (zh) | 显示设备和电子设备 | |
WO2004066247A1 (ja) | フラットディスプレイ装置及び携帯端末装置 | |
JP2005156962A (ja) | 電気光学装置、電気光学装置の駆動方法および電子機器 | |
CN101322178B (zh) | 显示器件和电子装置 | |
JP2008170978A (ja) | 表示装置及びその駆動方法 | |
JP2005309304A (ja) | データ線駆動回路、電気光学装置および電子機器 | |
JP2000227585A (ja) | 駆動回路一体型液晶表示装置 | |
US20080122810A1 (en) | Flat Display Unit | |
KR100719053B1 (ko) | 고속 처리 및 저소비 전력화를 도모하는 구동회로 및그것을 구비한 화상 표시장치와 그것을 구비한 휴대 기기 | |
JP4947167B2 (ja) | 表示装置および携帯端末 | |
JP2002175021A (ja) | アクティブマトリクス型表示装置およびこれを用いた携帯端末 | |
JP2005300898A (ja) | 電気光学装置、電気光学装置の駆動方法および電子機器 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN KR SG US |
|
ENP | Entry into the national phase |
Ref document number: 2006164353 Country of ref document: US Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10541095 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020057012892 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20038A90043 Country of ref document: CN |
|
WWP | Wipo information: published in national office |
Ref document number: 1020057012892 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 10541095 Country of ref document: US |