WO2011152121A1 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- WO2011152121A1 WO2011152121A1 PCT/JP2011/058765 JP2011058765W WO2011152121A1 WO 2011152121 A1 WO2011152121 A1 WO 2011152121A1 JP 2011058765 W JP2011058765 W JP 2011058765W WO 2011152121 A1 WO2011152121 A1 WO 2011152121A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- display
- pixel
- flip
- display unit
- flop
- Prior art date
Links
Images
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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- 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
- G09G3/2085—Special arrangements for addressing the individual elements of the matrix, other than by driving respective rows and columns in combination
-
- 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
- G02F1/133388—Constructional arrangements; Manufacturing methods with constructional differences between the display region and the peripheral region
-
- 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
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0809—Several active elements per pixel in active matrix panels
- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G2300/0857—Static memory circuit, e.g. flip-flop
Definitions
- the present invention relates to a display device, and more particularly to a display device having a function of displaying an image based on data held in a memory.
- liquid crystal display devices have a memory function corresponding to each pixel in order to reduce power consumption.
- Such a device is called “memory liquid crystal display” or simply “memory liquid crystal”.
- a memory liquid crystal display can hold 1-bit data for each pixel. When an image with the same content or an image with little change is displayed for a long time, the data held in the memory is used. The displayed image is displayed.
- the memory liquid crystal display once data is written to the memory, the content of the data written to the memory is held until it is rewritten next time. For this reason, power is hardly consumed in periods other than the period before and after the content of the image changes. As a result, power consumption is reduced as compared with a liquid crystal display device having no memory function.
- driving the liquid crystal using the memory function is referred to as “memory driving”.
- a conventional memory liquid crystal display rectangular pixels are arranged in a matrix on the display unit, as in a general active matrix liquid crystal display.
- a conventional memory liquid crystal display includes a gate driver (scanning signal line driving circuit) and a source driver (video signal line driving circuit) as driving circuits, as in a general active matrix type liquid crystal display.
- a gate driver scanning signal line driving circuit
- a source driver video signal line driving circuit
- Japanese Patent Application Laid-Open No. 2007-286237 discloses an invention of a display device including a pixel memory circuit having the configuration shown in FIG.
- a pixel memory circuit is provided for each pixel unit including three RGB sub-pixels, not for each RGB sub-pixel.
- power consumption is reduced by driving using a memory while suppressing an increase in circuit area.
- a display system for a clock application has been developed as one of applications regarding a liquid crystal display device.
- a liquid crystal display device provided with such a display system, it is necessary to display an image simulating a second hand of a clock.
- the conventional liquid crystal display device since the pixels are rectangular and arranged in a matrix, when the resolution (pixel density) is low, as shown in FIG. A smooth image having an edge (typically a boundary portion between black display and white display) cannot be displayed as a simulated image.
- the resolution is low, the degree of freedom in design regarding image display is low.
- the data in the memory must be rewritten every second, so that the effect of reducing power consumption is remarkably obtained. I can't.
- an object of the present invention is to provide a display device that operates with low power consumption and has a high degree of design freedom regarding image display.
- 1st aspect of this invention is a display apparatus which displays an image by changing the display state of a pixel,
- a plurality of video signal lines, a plurality of scanning signal lines intersecting with the plurality of video signal lines, and a plurality of video signal lines and the intersections of the plurality of video signal lines and the plurality of scanning signal lines are respectively arranged in a matrix.
- Each pixel based on a video signal applied to a video signal line passing through the intersection when a scanning signal line passing through the intersection corresponding to each pixel electrode is selected.
- a first display unit in which a display state of a pixel corresponding to the electrode changes;
- a pixel memory capable of holding at least one bit of data for each pixel, and a second display unit that changes the display state of the pixels based on the data held in the pixel memory;
- the first display portion and the second display portion are formed on the same substrate.
- the second display unit includes: It consists of m flip-flops provided in correspondence with m pixels (m is a positive integer) and connected in series so that data based on the input data signal is sequentially transferred according to the clock pulse.
- a shift register A voltage selection unit that is provided to correspond to each flip-flop, and selects either the first voltage or the second voltage according to the logical value of the output signal from each flip-flop;
- a display element portion provided to correspond to each flip-flop, and to reflect the voltage selected by the voltage selection portion in a display state of a pixel corresponding to each flip-flop.
- the shape of the pixel included in the first display unit is a rectangle having two sides parallel to the scanning signal line and two sides parallel to the video signal line
- a shape of a pixel included in the second display portion is a shape including a side or a curve that is not parallel to any of the scanning signal line and the video signal line.
- the second display portion is formed on the substrate so as to surround the first display portion.
- the second display unit includes: It consists of m flip-flops provided in correspondence with m pixels (m is a positive integer) and connected in series so that data based on the input data signal is sequentially transferred according to the clock pulse.
- a shift register A voltage selection unit that is provided to correspond to each flip-flop, and selects either the first voltage or the second voltage according to the logical value of the output signal from each flip-flop;
- a display element portion provided to correspond to each flip-flop, and to reflect the voltage selected by the voltage selection portion in a display state of a pixel corresponding to each flip-flop.
- a sixth aspect of the present invention is the fifth aspect of the present invention,
- the second display unit selects one of an output signal from the flip-flop corresponding to the m-th stage of the shift register or the input data signal based on a predetermined instruction signal, and selects the selected signal from the shift register.
- the selection unit selects an output signal from a flip-flop corresponding to the m-th stage of the shift register after data based on the input data signal is transferred to the m flip-flops. .
- a seventh aspect of the present invention is the sixth aspect of the present invention.
- the second display unit includes, as the shift register, a shift register including 60 flip-flops provided so as to correspond to 60 pixels,
- the level of the input data signal is a first level for a period corresponding to the generation interval of the clock pulse only once, and is a second level for other periods.
- the second display unit includes, as the shift register, a shift register including 60 flip-flops provided so as to correspond to 60 pixels,
- the level of the input data signal is set to the first level only during a period corresponding to the generation interval of the clock pulse every time the clock pulse is generated 60 times, and is set to the second level during other periods. It is characterized by.
- the first display unit further includes a storage circuit that captures and holds 1-bit data for each pixel or a predetermined number of pixels based on a video signal applied to the video signal line,
- the first display unit is characterized in that when a predetermined display mode is set, the display state of the pixels changes based on data held in the storage circuit.
- the display device includes a first display unit that performs general active matrix driving and a second display unit that performs memory driving using a pixel memory. It has been.
- the first display unit and the second display unit are formed on the same substrate. In such a configuration, a still image, an image with little change, or a regular image with changes are displayed on the second display unit, and other images are displayed on the first display unit, which is unnecessary. Power consumption is suppressed. Thereby, compared with the conventional display apparatus, power consumption is reduced.
- the second display section includes a shift register configured by connecting flip-flops provided so as to correspond to each pixel in series, and each flip-flop.
- a voltage selection unit that selects one of the two voltages in accordance with the output signal, and a display element unit for reflecting the voltage selected by the voltage selection unit in the display state of the pixel corresponding to each flip-flop. It has been. Since each flip-flop can hold 1-bit data, in each flip-flop, the input data is transferred to the next-stage flip-flop and the input data is given to the voltage selection unit to display the corresponding pixel. Can be brought into a display state based on the input data.
- the second display unit does not include a drive circuit (scanning signal line drive circuit, video signal line drive circuit) provided in a conventional general display device, and shifts display image data to a shift register.
- a drive circuit scanning signal line drive circuit, video signal line drive circuit
- data corresponding to the display image can be given to all flip-flops (that is, memories corresponding to the respective pixels) constituting the shift register. Since the first display unit operates based on a driving circuit provided in a conventional general display device, the second display unit operates independently of the first display unit. For this reason, a still image, an image with little change, and a regular image with change are displayed on the second display unit, thereby effectively reducing power consumption.
- the shape of the pixel included in the second display unit is the shape of a general pixel (two sides parallel to the scanning signal line and two sides parallel to the video signal line). And a different shape. For this reason, even when the resolution is low, it is possible to display images based on various shapes as images that do not feel uncomfortable for the viewer. This realizes a display device that operates with low power consumption and has a high degree of freedom in design for image display.
- a display device that displays a still image, an image with little change, or a regular image with change around a display unit where general image display is performed is operated with low power consumption. It becomes possible.
- the display device having a configuration in which the pixel having a shape different from the shape of a general pixel is included in the second display unit, as in the second aspect of the present invention, a still image By displaying an image with little change or a regular image with change on the second display unit, power consumption is effectively reduced.
- the data necessary for the image display is stored in the flip-flop constituting the shift register.
- the number of data is equal to the number. For this reason, since the period during which valid data is to be supplied by the input data signal is remarkably shortened, power consumption is effectively reduced.
- the shift register is composed of 60 flip-flops, and the level of the input data signal becomes the first level only once during the operation of the display device (the first period is the most Maintained at a level of 2). Further, after the data based on the input data signal is transferred to the 60 flip-flops, the output signal from the flip-flop corresponding to the 60th stage of the shift register is given to the flip-flop corresponding to the 1st stage of the shift register. It is done. As described above, by setting the clock pulse generation interval to 1 second, it is possible to display an image imitating the second hand of the clock on the second display unit. As a result, a display device including a display system for a clock that operates with low power consumption is realized.
- the shift register includes 60 flip-flops, and the level of the input data signal becomes the first level for a predetermined period every time the clock pulse is generated 60 times (otherwise During this period is maintained at the second level).
- the clock pulse generation interval is set to 1 second, it is possible to display an image imitating the second hand of the clock on the second display unit.
- a display device including a display system for a clock that operates with low power consumption is realized.
- a still image, an image with little change, and a regular image with changes can be displayed on the first display unit using a memory (storage circuit).
- a memory storage circuit
- FIG. 1 It is a block diagram which shows the functional structure of the liquid crystal display device which concerns on one Embodiment of this invention. It is a schematic block diagram of the liquid crystal panel which comprises the liquid crystal display device in the said embodiment. It is an enlarged view of the part shown with the code
- FIG. 4 is a circuit diagram illustrating a specific configuration example of a flip-flop in the embodiment.
- FIG. 4 is a circuit diagram illustrating a specific configuration example of a voltage selection unit in the embodiment.
- it is a signal waveform diagram for demonstrating the drive method of a memory display part.
- It is a figure which shows the example of a display image in the said embodiment.
- it is a signal waveform diagram for demonstrating the drive method of a memory display part.
- it is a figure which shows the relationship between a liquid crystal applied voltage and the transmittance
- it is a figure for demonstrating the change of a display image.
- FIG. 11 is a signal waveform diagram for describing a driving method of the memory display unit in the modification of the embodiment.
- it is a figure for demonstrating the positional relationship of the shape of a normal display part and a memory display part, and a normal display part and a memory display part.
- the modification of the said embodiment it is a figure for demonstrating the positional relationship of the shape of a normal display part and a memory display part, and a normal display part and a memory display part.
- it is a figure for demonstrating the shape of the pixel in a memory display part.
- it is a figure for demonstrating the case where seven pixels whose shape is a parallelogram are included in a memory display part.
- it is a figure for demonstrating the case where seven pixels whose shape is a parallelogram are included in a memory display part.
- it is a figure for demonstrating the case where seven pixels whose shape is a parallelogram are included in a memory display part.
- FIG. 3 is a circuit diagram showing a configuration of a pixel memory circuit in a display device disclosed in Japanese Patent Application Laid-Open No. 2007-286237.
- FIG. 3 is a circuit diagram showing a configuration of a pixel memory circuit in a display device disclosed in Japanese Patent Application Laid-Open No. 2007-286237.
- it is a figure for demonstrating the case where the image imitating the second hand of the timepiece is displayed.
- FIG. 2 is a schematic configuration diagram of a liquid crystal panel 100 constituting the liquid crystal display device according to the embodiment of the present invention.
- the liquid crystal panel 100 is provided with two display units that display images by different operations.
- One of the two display units is a normal display unit 20 that performs image display by general active matrix driving.
- the other of the two display units is a memory display unit 10 that performs image display by memory driving.
- the memory display unit 10 is formed in a ring shape so as to surround the normal display unit 20.
- the liquid crystal panel 100 is also provided with a terminal portion 19 in which terminals for connecting signal wiring extending from the outside of the panel substrate (for example, a flexible circuit board) and signal wiring in the panel substrate are formed.
- a terminal portion 19 in which terminals for connecting signal wiring extending from the outside of the panel substrate (for example, a flexible circuit board) and signal wiring in the panel substrate are formed.
- an image imitating the second hand of a clock is displayed.
- FIG. 3 is an enlarged view of a portion indicated by reference numeral 6 in FIG.
- the shape of the pixel is a rectangle (typically, two sides parallel to the gate bus line (scanning signal line) and two sides parallel to the source bus line (video signal line) (typically Square).
- a pixel shape is referred to as a “normal pixel shape”.
- the pixel has a substantially rectangular shape having two substantially parallel sides connecting the inner side and the outer side of the ring shape and two sides perpendicular to the two sides.
- the inclination of the long side and the short side constituting the rectangle is different for each pixel.
- the memory display unit 10 includes pixels having shapes other than the normal pixel shape.
- the first display unit is realized by the normal display unit 20 and the second display unit is realized by the memory display unit 10.
- FIG. 1 is a block diagram showing a functional configuration of the liquid crystal display device according to the present embodiment.
- This liquid crystal display device includes components for realizing image display on the normal display unit 20 and components for realizing image display on the memory display unit 10.
- the component for forming the pixels in the normal display unit 20 is referred to as a pixel forming unit 21, and the component for forming the pixels in the memory display unit 10 is referred to as a pixel memory unit PMU (FIG. 4).
- a plurality of source bus lines (video signal lines) SL As constituent elements for realizing image display in the normal display unit 20, a plurality of source bus lines (video signal lines) SL, a plurality of gate bus lines (scanning signal lines) GL, and the plurality of source buses.
- a driver 40 is included in the liquid crystal display device.
- a plurality of pixel memory units PMU and signal wirings for transmitting various signals and the like for operating the plurality of pixel memory units PMU are provided. .
- FIG. 1 it is assumed that eight pixel memory units PMU (1) to PMU (8) are included in the liquid crystal display device as shown in FIG.
- the pixel memory units PMU (1) to PMU (8) commonly have two-phase clock signals CK and CKB, a white display voltage VW for displaying the pixel in white, and a pixel display. A black display voltage VBL for making the state black is provided.
- the pixel memory unit PMU (1) is provided with display data DATA for designating the display state of the pixels.
- Each pixel memory unit PMU includes a flip-flop that can hold 1-bit data. Then, the flip-flops 11 (1) to 11 (8) included in the pixel memory units PMU (1) to PMU (8) are connected in series as shown in FIG. Has been. Accordingly, the display data DATA given to the pixel memory unit PMU (1) is sequentially transferred to the pixel memory units PMU (2) to PMU (8) based on the clock signals CK and CKB.
- FIG. 6 is a circuit diagram illustrating a configuration of the pixel forming unit 21 that forms pixels in the normal display unit 20.
- the gate electrode 211 is connected to the gate bus line GL passing through the corresponding intersection
- the source electrode 212 is connected to the source bus line SL passing through the intersection.
- the TFT 210, the pixel electrode 214 connected to the drain electrode 213 of the TFT 210, the common electrode 216 and the auxiliary capacitance electrode 218 provided in common to the plurality of pixel forming portions 21, the pixel electrode 214 and the common electrode 216 And a storage capacitor 217 formed by the pixel electrode 214 and the storage capacitor electrode 218 are included.
- the liquid crystal capacitor 215 and the auxiliary capacitor 217 form a pixel capacitor CP. Then, based on the video signal that the source electrode 212 of the TFT 210 receives from the source bus line SL when the gate electrode 211 of the TFT 210 receives the active scanning signal from the gate bus line GL, the voltage indicating the pixel value in the pixel capacitor CP. Is retained.
- FIG. 7 is a block diagram showing a configuration of the pixel memory unit PMU.
- the pixel memory unit PMU includes a flip-flop 11, a voltage selection unit 12, and a liquid crystal capacitor 13.
- the flip-flop 11 receives the signal Qn (output signal from the preceding flip-flop 11) as an input signal, and outputs “signal Qn + 1” and “logic inversion signal of signal Qn + 1” as output signals based on the clock signals CK and CKB. To do.
- the “logic inversion signal of the signal Qn + 1” is expressed as “signal Qn + 1B”.
- the voltage selection unit 12 selects either the white display voltage VW or the black display voltage VBL based on the signal Qn + 1 and the signal Qn + 1B, and outputs the selected voltage as the pixel electrode voltage VLC.
- the liquid crystal capacitor 13 is formed by a pixel electrode and a common electrode, and the display state of the pixel changes according to the difference between the pixel electrode voltage VLC and the common electrode voltage VCOM.
- FIG. 8 is a circuit diagram showing a specific configuration example of the flip-flop 11.
- the flip-flop 11 takes in the signal Qn and holds it as transfer data.
- the flip-flop 11 takes in the transfer data and holds it as output data. Based on the output data, the signal Qn + 1 and the signal Qn + 1B And a second latch unit 112 for outputting.
- the first latch unit 111 has a clocked inverter (hereinafter referred to as “first clocked inverter”) 141 to which a signal Qn is applied to an input terminal, and an input terminal connected to an output terminal of the first clocked inverter 141.
- An inverter 142 hereinafter referred to as “first inverter”
- a clocked inverter hereinafter referred to as “first inverter”
- first inverter whose input terminal is connected to the output terminal of the first inverter 142 and whose output terminal is connected to the input terminal of the first inverter 142.
- “Second clocked inverter”) 143 The output terminal of the first inverter 142 is also connected to the input terminal of a third clocked inverter 146 described later.
- the second latch unit 112 has a clocked inverter (hereinafter referred to as “third clocked inverter”) 146 whose input terminal is connected to the output terminal of the first inverter 142, and an input terminal of the third clocked inverter 146.
- An inverter connected to the output terminal hereinafter referred to as “second inverter”) 147, an input terminal connected to the output terminal of the second inverter 147, and an output terminal connected to the input terminal of the second inverter 147
- a clocked inverter hereinafter referred to as “fourth clocked inverter”
- the signal Qn + 1 is output from the output terminal of the second inverter 147
- the signal Qn + 1B is output from the output terminal of the fourth clocked inverter 148.
- the first clocked inverter 141 and the fourth clocked inverter 148 function as inverters when the clock signal CK is at a high level and the clock signal CKB is at a low level, and the clock signal CK is at a low level and the clock signal CKB is at a high level. At the level, the input terminal and the output terminal are electrically disconnected.
- the second clocked inverter 143 and the third clocked inverter 146 when the clock signal CK is at a high level and the clock signal CKB is at a low level, the input terminal and the output terminal are electrically disconnected, and the clock signal CK is When the clock signal CKB is at a low level and a high level, it functions as an inverter.
- the value of the signal Qn given during the period when the clock signal CK is high level and the clock signal CKB is low level is transferred to the first latch unit 111 as transfer data. Retained.
- the waveform of the signal Qn + 1 next changes the clock signal CK from the high level to the low level and the clock signal CKB changes from the low level to the high level. Until the point of change.
- FIG. 9 is a circuit diagram illustrating a specific configuration example of the voltage selection unit 12.
- the voltage selection unit 12 includes CMOS switches 121 and 122 composed of P-type TFTs and N-type TFTs.
- CMOS switch 121 a white display voltage VW is applied to an input terminal, and an output terminal is connected to a pixel electrode.
- a signal Qn + 1 is applied to the gate terminal of the N-type TFT of the CMOS switch 121, and a signal Qn + 1B is applied to the gate terminal of the P-type TFT of the CMOS switch 121.
- the CMOS switch 122 the black display voltage VBL is applied to the input terminal, and the output terminal is connected to the pixel electrode.
- a signal Qn + 1B is applied to the gate terminal of the N-type TFT of the CMOS switch 122, and a signal Qn + 1 is applied to the gate terminal of the P-type TFT of the CMOS switch 122.
- the CMOS switch 121 is turned off and the CMOS switch 122 is turned on, and the black display voltage VBL is applied to the pixel electrode.
- data D1 is input to the flip-flop 11 (1) as display data DATA.
- the clock signal CK changes from high level to low level, and the clock signal CKB changes from low level to high level. For this reason, based on the value of the data D1, the output signal Q1 of the flip-flop 11 (1) becomes high level.
- the output signal Q1 is supplied to the voltage selector 12 (see FIG. 9) and also to the flip-flop 11 (2).
- data D2 is input to the flip-flop 11 (1) as display data DATA. Since the output signal Q1 from the flip-flop 11 (1) is given to the flip-flop 11 (2), at this time, the data D1 is inputted to the flip-flop 11 (2). Further, at time t2, similarly to time t1, the clock signal CK changes from the high level to the low level, and the clock signal CKB changes from the low level to the high level. Thereby, the output signal Q1 of the flip-flop 11 (1) becomes a low level based on the value of the data D2, and the output signal Q2 of the flip-flop 11 (2) becomes a high level based on the value of the data D1.
- the display data DATA is high level only for the data D1 among the data D1 to D8. Therefore, during the period from time t1 to time t9, the output signals Q1 to Q8 sequentially become high level one by one.
- data D9 is input to the flip-flop 11 (1) as display data DATA.
- the output signal Q1 of the flip-flop 11 (1) is at the high level in the same manner as at the time point t1.
- the output signals Q1 to Q8 of the flip-flops 11 (1) to 11 (8) repeatedly and sequentially become high level for a predetermined period.
- the flip-flops 11 (1) to 11 (8) output the output signals Q1 to Q8 and their logical inversion signals. These signals are given to the voltage selection unit 12 corresponding to each flip-flop 11.
- the waveforms of the white display voltage VW and the black display voltage VBL applied to the voltage selection unit 12 will be described with reference to FIG.
- the common electrode voltage VCOM a high level and a low level are alternately repeated every predetermined period.
- the white display voltage VW and the common electrode voltage VCOM have the same phase.
- the phases of the black display voltage VBL and the common electrode voltage VCOM are shifted by 180 degrees.
- the high-level potentials of the white display voltage VW and the black display voltage VBL are substantially equal to the high-level potential of the common electrode voltage VCOM.
- the low-level potentials of the white display voltage VW and the black display voltage VBL are substantially equal to the low-level potential of the common electrode voltage VCOM. As described above, the difference between the potential of the white display voltage VW and the potential of the common electrode voltage VCOM is maintained at substantially zero. On the other hand, the difference between the potential of the black display voltage VBL and the potential of the common electrode voltage VCOM is maintained at a magnitude substantially corresponding to the amplitude of the black display voltage VBL.
- FIG. 13 is a diagram showing the relationship between the liquid crystal applied voltage and the transmittance.
- the relationship shown in FIG. 13 is for a liquid crystal display device adopting a normally white system. From FIG. 13, it is understood that the transmittance increases as the liquid crystal applied voltage decreases, and the transmittance decreases as the liquid crystal applied voltage increases.
- the voltage Va corresponds to the difference between the potential of the white display voltage VW and the potential of the common electrode voltage VCOM
- the voltage Vb corresponds to the difference between the potential of the black display voltage VBL and the potential of the common electrode voltage VCOM.
- the white display voltage VW is applied to the pixel electrode.
- the black display voltage VBL is applied. Is applied to the pixel electrode (see FIG. 9).
- the display state of the pixel is white display.
- the display state of the pixel is black.
- the eight pixel memory units PMU (1) to PMU (8) are described as being included in the liquid crystal display device.
- Sixty pixel memory units PMU are provided. That is, the shift register 110 illustrated in FIG. 5 includes 60 flip-flops 11. Then, clock signals CK and CKB that repeat predetermined changes at intervals of 1 second are given to each pixel memory unit PMU, and display data DATA that becomes a high level for 1 second every 60 seconds is supplied to the pixel memory unit PMU (1). Given. As a result, an image simulating the second hand of the clock is displayed on the memory display unit 10.
- the liquid crystal panel 100 includes a normal display unit 20 having pixels having a general shape (normal pixel shape) and active matrix driving, and pixels having a shape other than the normal pixel shape.
- a memory display unit 10 that performs memory driving is provided.
- the memory display unit 10 is generally formed in a ring shape so as to surround the display unit 20, and the shape of the pixel in the memory display unit 10 includes two substantially parallel sides connecting the inner side and the outer side of the ring shape, and the 2 It is substantially rectangular with two sides perpendicular to one side.
- the degree of freedom in design related to image display in the liquid crystal display device is increased.
- either the white display voltage VW or the black display voltage VBL is selected according to the output signal from the flip-flop 11 in the pixel memory unit PMU so as to correspond to each pixel memory unit PMU.
- a liquid crystal capacitor 13 for reflecting the voltage selected by the voltage selection unit 12 in the display state of the pixel corresponding to each flip-flop 11 is provided.
- the shift register 110 is configured by connecting the flip-flops 11 included in each of the plurality of pixel memory units PMU in the memory display unit 10 in series.
- each flip-flop 11 Since each flip-flop 11 can hold 1-bit data, each flip-flop 11 transfers the input data to the next-stage flip-flop 11 and changes the display state of the corresponding pixel to a display state based on the input data. It becomes possible to do. That is, by providing display data DATA to the shift register 110 without providing a gate driver or source driver, data corresponding to a display image can be provided to the flip-flops 11 in all the pixel memory units PMU. At this time, the memory display unit 10 operates (drives) independently of the source driver 30 and the gate driver 40 that drive the normal display unit 20. Thereby, it is possible to reduce power consumption when displaying an image imitating the second hand of a clock. As described above, according to the present embodiment, a liquid crystal display device that operates with low power consumption while increasing the degree of freedom of design for image display is realized.
- the output signal Q8 of the flip-flop 11 (8) in the pixel memory unit PMU (8) is provided to the flip-flop 11 (1) in the pixel memory unit PMU (1). None (see FIG. 1).
- the output signal Q8 of the flip-flop 11 (8) in the pixel memory unit PMU (8) is sent to the flip-flop 11 (1) in the pixel memory unit PMU (1). Configured to be given.
- FIG. 15 is a block diagram showing a functional configuration of the liquid crystal display device in the modification of the embodiment.
- a selection circuit 50 is provided between the pixel memory unit PMU (8) and the pixel memory unit PMU (1).
- the selection data 50, the output signal Q8, and the selection signal SEL are input to the selection circuit 50.
- one of the display data DATA and the output signal Q8 is selected based on the selection signal SEL, and the selected signal is given to the flip-flop 11 (1) in the pixel memory unit PMU (1).
- FIG. 16 is a circuit diagram illustrating a specific configuration example of the selection circuit 50.
- the selection circuit 50 includes an inverter 51 and CMOS switches 52 and 53 each including a P-type TFT and an N-type TFT.
- the inverter 51 the selection signal SEL is given to the input terminal, and the output terminal is connected to the gate terminal of the P-type TFT of the CMOS switch 52 and the gate terminal of the N-type TFT of the CMOS switch 53.
- the CMOS switch 52 display data DATA is given to an input terminal, and an output terminal is connected to the flip-flop 11 (1) in the pixel memory unit PMU (1).
- a selection signal SEL is applied to the gate terminal of the N-type TFT of the CMOS switch 52, and a logic inversion signal of the selection signal SEL is applied to the gate terminal of the P-type TFT of the CMOS switch 52.
- the CMOS switch 53 an output signal Q8 is given to the input terminal, and the output terminal is connected to the flip-flop 11 (1) in the pixel memory unit PMU (1).
- a logic inversion signal of the selection signal SEL is given to the gate terminal of the N-type TFT of the CMOS switch 53, and a selection signal SEL is given to the gate terminal of the P-type TFT of the CMOS switch 53.
- the selection signal SEL when the selection signal SEL is at a low level, the CMOS switch 52 is turned off and the CMOS switch 53 is turned on.
- the selection signal SEL when the selection signal SEL is at a high level, the CMOS switch 52 is turned on and the CMOS switch 53 is turned off. Therefore, as shown in FIG. 17, when the selection signal SEL is at the low level, the output signal Q8 is given to the flip-flop 11 (1) in the pixel memory unit PMU (1) as the output signal OUT from the selection circuit 50.
- the selection signal SEL is at a high level, the display data DATA is supplied as the output signal OUT from the selection circuit 50 to the flip-flop 11 (1) in the pixel memory unit PMU (1).
- the selection signal SEL is maintained at the high level during the period from the time point t1 to the time point t8, and the selection signal SEL is at the high level during the period from the time point t8 to the time point t9. Can be changed from low to low. In the period after time t9, the selection signal SEL is maintained at a low level.
- the output signals Q1 to Q8 are sequentially set to the high level one by one in the period after the time point t9.
- the period during which valid data as the display data DATA is to be supplied is significantly shortened. Therefore, power consumption is reduced compared to the above embodiment.
- the ring-shaped memory display unit 10 is formed so as to surround the normal display unit 20 (see FIG. 2), but the present invention is not limited to this.
- a frame-shaped memory display unit 10 may be formed on one panel substrate so as to surround the rectangular normal display unit 20.
- the rectangular memory display unit 10 and the rectangular normal display unit 20 may be arranged vertically so as to be viewed from the viewer.
- the shapes of the normal display unit 20 and the memory display unit 10 and the normal display unit 20 and the memory display unit 10 The positional relationship is not limited at all.
- the shape shown in FIG. 3 is exemplified as the shape of the pixel in the memory display unit 10, but the present invention is not limited to this.
- the shape of the pixel in the memory display unit 10 may be a shape including a side or a curve that is not parallel to either the gate bus line GL or the source bus line SL. Accordingly, for example, pixels having various shapes such as a hexagonal shape as shown in FIG. 21 (pixels having a shape other than the normal pixel shape) can be applied to the present invention.
- seven pixels having a parallelogram shape may be included in the memory display unit 10.
- the seven pixels represent numbers from 0 to 9.
- the waveform of the display data DATA is as shown in FIG.
- the output signals Q1, Q2, Q3, Q5, and Q6 are at a high level.
- the display states of the pixels corresponding to the symbols PIX (1), PIX (2), PIX (3), PIX (5), and PIX (6) are displayed in black.
- the display state of the pixel is white. In this way, it is possible to reduce the power consumption of a liquid crystal display device including a system for displaying numbers.
- a pixel memory circuit (memory) that can hold 1-bit data for each sub-pixel or for each pixel unit as disclosed in Japanese Unexamined Patent Publication No. 2007-286237.
- a circuit may be further provided in the pixel forming unit 21 and a function of displaying an image based on data stored in the pixel memory circuit may be further provided.
- two display modes are provided in advance as a display method in the normal display unit, and “a conventional image display is performed in one display mode and a pixel memory circuit is displayed in the other display mode. “Image display based on stored data is performed”. Thus, a still image, an image with little change, and a regular image with changes can be displayed on the normal display unit using the memory. As a result, power consumption can be significantly reduced.
- a plurality of pixel memory units having the same configuration as the pixel memory units PMU (1) to PMU (8) in the memory display section (reference numerals PMU2 (1) to PMU2 (24) in FIG. 25). It is also possible to provide the pixel display unit) in the normal display unit so that the image display in the normal display unit is performed by the same operation as that in the memory display unit.
- the liquid crystal display device has been described as an example, but the present invention is not limited to this.
- the present invention can also be applied to other display devices such as an organic EL (Electro Luminescence).
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
Description
複数の映像信号線と、前記複数の映像信号線と交差する複数の走査信号線と、前記複数の映像信号線と前記複数の走査信号線との交差点にそれぞれ対応してマトリクス状に配置され各画素に対応する画素電極とを含み、各画素電極に対応する交差点を通過する走査信号線が選択されている時に当該交差点を通過する映像信号線に印加されている映像信号に基づいて当該各画素電極に対応する画素の表示状態が変化する第1の表示部と、
各画素につき少なくとも1ビットのデータを保持することのできる画素メモリが設けられ、前記画素メモリに保持されているデータに基づいて画素の表示状態が変化する第2の表示部と
を備え、
前記第1の表示部と前記第2の表示部とは同一の基板上に形成されていることを特徴とする。
前記第2の表示部は、
m個(mは正の整数)の画素にそれぞれ対応するように設けられクロックパルスに応じて入力データ信号に基づくデータが順次に転送されるように直列に接続されたm個のフリップフロップからなるシフトレジスタと、
各フリップフロップに対応するように設けられ、各フリップフロップからの出力信号の論理値に応じて第1電圧または第2電圧のいずれかを選択する電圧選択部と、
各フリップフロップに対応するように設けられ、前記電圧選択部によって選択された電圧を各フリップフロップに対応する画素の表示状態に反映させるための表示素子部と
を含むことを特徴とする。
前記第1の表示部に含まれる画素の形状は、前記走査信号線に平行な2つの辺と前記映像信号線に平行な2つの辺とを有する長方形であって、
前記第2の表示部に含まれる画素の形状は、前記走査信号線および前記映像信号線のいずれにも平行でない辺または曲線を含む形状であることを特徴とする。
前記第2の表示部は、前記基板上において前記第1の表示部を取り囲むように形成されていることを特徴とする。
前記第2の表示部は、
m個(mは正の整数)の画素にそれぞれ対応するように設けられクロックパルスに応じて入力データ信号に基づくデータが順次に転送されるように直列に接続されたm個のフリップフロップからなるシフトレジスタと、
各フリップフロップに対応するように設けられ、各フリップフロップからの出力信号の論理値に応じて第1電圧または第2電圧のいずれかを選択する電圧選択部と、
各フリップフロップに対応するように設けられ、前記電圧選択部によって選択された電圧を各フリップフロップに対応する画素の表示状態に反映させるための表示素子部と
を含むことを特徴とする。
前記第2の表示部は、前記シフトレジスタのm段目に対応するフリップフロップからの出力信号または前記入力データ信号の一方を所定の指示信号に基づいて選択して当該選択した信号を前記シフトレジスタの1段目に対応するフリップフロップに与える選択部を更に含み、
前記選択部は、前記入力データ信号に基づくデータが前記m個のフリップフロップに転送された後には、前記シフトレジスタのm段目に対応するフリップフロップからの出力信号を選択することを特徴とする。
前記第2の表示部は、前記シフトレジスタとして、60個の画素にそれぞれ対応するように設けられた60個のフリップフロップからなるシフトレジスタを含み、
前記入力データ信号のレベルは、1回だけ前記クロックパルスの発生間隔に相当する期間第1のレベルとされ、それ以外の期間には第2のレベルとされることを特徴とする。
前記第2の表示部は、前記シフトレジスタとして、60個の画素にそれぞれ対応するように設けられた60個のフリップフロップからなるシフトレジスタを含み、
前記入力データ信号のレベルは、前記クロックパルスが60回発生する毎に前記クロックパルスの発生間隔に相当する期間だけ第1のレベルとされ、それ以外の期間には第2のレベルとされることを特徴とする。
前記第1の表示部は、画素毎または所定個数の画素毎に、前記映像信号線に印加されている映像信号に基づき1ビットのデータを取り込んで保持する記憶回路を更に含み、
前記第1の表示部では、予め定められた表示モードになっている時、前記記憶回路に保持されているデータに基づいて画素の表示状態が変化することを特徴とする。
図2は、本発明の一実施形態に係る液晶表示装置を構成する液晶パネル100の概略構成図である。図2に示すように、液晶パネル100には、互いに異なる動作によって画像を表示する2つの表示部が設けられている。2つの表示部のうちの一方は、一般的なアクティブマトリクス駆動による画像表示が行われる通常表示部20である。2つの表示部のうちの他方は、メモリ駆動による画像表示が行われるメモリ表示部10である。本実施形態においては、メモリ表示部10は通常表示部20を取り囲むようにリング状に形成されている。液晶パネル100には、また、パネル基板の外部(例えばフレキシブル回路基板)から延びる信号配線とパネル基板内の信号配線とを接続するための端子が形成された端子部19が設けられている。なお、本実施形態におけるメモリ表示部10においては、時計の秒針を模した画像の表示が行われる。
図1は、本実施形態における液晶表示装置の機能的構成を示すブロック図である。この液晶表示装置には、通常表示部20における画像表示を実現するための構成要素と、メモリ表示部10における画像表示を実現するための構成要素とが含まれている。なお、以下においては、通常表示部20内の画素を形成するための構成要素を画素形成部21といい、メモリ表示部10内の画素を形成するための構成要素を画素メモリユニットPMUという(図4参照)。通常表示部20における画像表示を実現するための構成要素として、複数本のソースバスライン(映像信号線)SLと、複数本のゲートバスライン(走査信号線)GLと、それら複数本のソースバスラインSLと複数本のゲートバスラインGLとの交差点にそれぞれ対応して設けられた複数個の画素形成部21と、ソースバスラインSLを駆動するソースドライバ30と、ゲートバスラインGLを駆動するゲートドライバ40とが、液晶表示装置に含まれている。また、メモリ表示部10における画像表示を実現するための構成要素として、複数個の画素メモリユニットPMUと、それら複数個の画素メモリユニットPMUを動作させるための各種信号等を伝達する信号配線とが、この液晶表示装置に含まれている。なお、本説明においては、図1に示すように8個の画素メモリユニットPMU(1)~PMU(8)が液晶表示装置に含まれているものと仮定する。
図6は、通常表示部20内の画素を形成する画素形成部21の構成を示す回路図である。図6に示すように、各画素形成部には、対応する交差点を通過するゲートバスラインGLにゲート電極211が接続されるとともに当該交差点を通過するソースバスラインSLにソース電極212が接続されたTFT210と、そのTFT210のドレイン電極213に接続された画素電極214と、上記複数個の画素形成部21に共通的に設けられた共通電極216および補助容量電極218と、画素電極214と共通電極216とによって形成される液晶容量215と、画素電極214と補助容量電極218とによって形成される補助容量217とが含まれている。また、液晶容量215と補助容量217とによって画素容量CPが形成されている。そして、TFT210のゲート電極211がゲートバスラインGLからアクティブな走査信号を受けたときに当該TFT210のソース電極212がソースバスラインSLから受ける映像信号に基づいて、画素容量CPに画素値を示す電圧が保持される。
図7は、画素メモリユニットPMUの構成を示すブロック図である。図7に示すように、画素メモリユニットPMUは、フリップフロップ11と電圧選択部12と液晶容量13とを備えている。フリップフロップ11は、信号Qn(前段のフリップフロップ11からの出力信号)を入力信号として受け取り、クロック信号CK,CKBに基づき「信号Qn+1」と「信号Qn+1の論理反転信号」とを出力信号として出力する。なお、以下においては、「信号Qn+1の論理反転信号」のことを「信号Qn+1B」と表す。電圧選択部12は、信号Qn+1と信号Qn+1Bとに基づいて白色表示用電圧VWまたは黒色表示用電圧VBLのいずれかを選択し、その選択した電圧を画素電極電圧VLCとして出力する。液晶容量13は画素電極と共通電極とによって形成されており、画素電極電圧VLCと共通電極電圧VCOMとの差に応じて画素の表示状態が変化する。
次に、図5および図10を参照しつつ、本実施形態におけるメモリ表示部10の駆動方法について説明する。なお、図10に示す信号波形図の先頭の波形に付した符号は、各時点に表示用データDATAによってフリップフロップ11(1)に入力されている1ビットのデータを本説明において識別するための符号である。図10では、例えば、時点t5から時点t6までの期間には表示用データDATAによって「データD5」がフリップフロップ11(1)に入力されることが示されている。また、ここでは、図11に示すように、任意の時点において画素メモリユニットPMU(1)~PMU(8)に対応する8個の画素のうちの1つだけを黒色表示とする例を挙げて説明する。
本実施形態によれば、液晶パネル100には、一般的な形状(通常画素形状)の画素を有しアクティブマトリクス駆動が行われる通常表示部20と、通常画素形状以外の形状の画素を有しメモリ駆動が行われるメモリ表示部10とが設けられている。メモリ表示部10は通常表示部20を取り囲むようにリング状に形成され、メモリ表示部10内の画素の形状は、リング形状の内側部と外側部とを結ぶほぼ平行な2つの辺と当該2つの辺に垂直な2つの辺とを有するほぼ長方形とされている。これにより、解像度が低い場合でも、時計の秒針を模した画像としてエッジの滑らかな画像をメモリ表示部10を用いて表示することが可能となる。このようにして、液晶表示装置における画像表示に関するデザイン性の自由度が高められる。また、メモリ表示部10においては、各画素メモリユニットPMUに対応するように、画素メモリユニットPMU内のフリップフロップ11からの出力信号に応じて白色表示用電圧VWまたは黒色表示用電圧VBLのいずれかを選択する電圧選択部12と、電圧選択部12によって選択された電圧を各フリップフロップ11に対応する画素の表示状態に反映させるための液晶容量13とが設けられている。ここで、メモリ表示部10内の複数の画素メモリユニットPMUのそれぞれに含まれるフリップフロップ11が直列に接続されることによって、シフトレジスタ110が構成されている。フリップフロップ11は1ビットのデータの保持が可能であるので、各フリップフロップ11において、入力データを次段のフリップフロップ11に転送しつつ、対応する画素の表示状態を入力データに基づく表示状態にすることが可能となる。すなわち、ゲートドライバやソースドライバを備えることなく、シフトレジスタ110に表示用データDATAを与えることによって全ての画素メモリユニットPMU内のフリップフロップ11に表示画像に対応するデータを与えることができる。このとき、メモリ表示部10は、通常表示部20を駆動するソースドライバ30やゲートドライバ40とは独立して動作する(駆動される)。これにより、時計の秒針を模した画像などを表示する際の消費電力を低減することが可能となる。以上のように、本実施形態によれば、画像表示に関するデザイン性の自由度を高めつつ低消費電力で動作する液晶表示装置が実現される。
以下、上記実施形態の変形例について説明する。
上記実施形態においては、画素メモリユニットPMU(8)内のフリップフロップ11(8)の出力信号Q8が画素メモリユニットPMU(1)内のフリップフロップ11(1)に与えられるようには構成されていなかった(図1参照)。これに対して、以下に説明する変形例においては、画素メモリユニットPMU(8)内のフリップフロップ11(8)の出力信号Q8が画素メモリユニットPMU(1)内のフリップフロップ11(1)に与えられるように構成されている。
上記実施形態においては、通常表示部20を取り囲むようにリング状のメモリ表示部10が形成されていたが(図2参照)、本発明はこれに限定されない。例えば、図19に示すように、1つのパネル基板上において、矩形の通常表示部20を取り囲むように枠型のメモリ表示部10が形成されていても良い。また、例えば、図20に示すように、1つのパネル基板上において、矩形のメモリ表示部10と矩形の通常表示部20とが視聴者から見て上下に並ぶように配置されていても良い。以上のように、通常表示部20とメモリ表示部10とが同一の基板上に形成されていれば、通常表示部20およびメモリ表示部10の形状や通常表示部20とメモリ表示部10との位置関係については何ら限定されない。
上記実施形態においては、メモリ表示部10内の画素の形状として図3に示す形状を例示したが、本発明はこれに限定されない。メモリ表示部10内の画素の形状については、ゲートバスラインGLおよびソースバスラインSLのいずれにも平行でない辺または曲線を含む形状であれば良い。従って、例えば図21に示すような六角形の形状など様々な形状の画素(通常画素形状以外の形状の画素)を本発明に適用することができる。
上記実施形態においては通常表示部では一般的なアクティブマトリクス駆動による画像表示が行われることを前提に説明しているが、本発明はこれに限定されない。例えば、図1に示した構成において、サブ画素毎あるいは上記日本の特開2007-286237号公報に開示されているように画素ユニット毎に1ビットのデータを保持することのできる画素メモリ回路(記憶回路)を画素形成部21に更に設け、その画素メモリ回路に格納されたデータに基づく画像表示を行う機能を更に備えるようにしても良い。この場合、通常表示部における表示方法として2つの表示モードを予め設けておき、「一方の表示モードの際には従来通りの画像表示が行われ、他方の表示モードの際には画素メモリ回路に格納されたデータに基づく画像表示が行われる」ようにすることができる。これにより、通常表示部において、静止画像や変化の少ない画像や変化の規則的な画像をメモリを用いて表示することができる。その結果、消費電力を顕著に低減させることが可能となる。
上記各実施形態においては液晶表示装置を例に挙げて説明したが、本発明はこれに限定されない。有機EL(Electro Luminescence)等の他の表示装置にも本発明を適用することができる。
11,11(1)~11(8)…フリップフロップ
12…電圧選択部
13…液晶容量
20…通常表示部
21…画素形成部
50…選択回路
100…液晶パネル
111…第1ラッチ部
112…第2ラッチ部
PMU,PMU(1)~PMU(8)…画素メモリユニット
CK,CKB…クロック信号
DATA…表示用データ
SEL…選択信号
VBL…黒色表示用電圧
VW…白色表示用電圧
VCOM…共通電極電圧
VLC…画素電極電圧
Claims (9)
- 画素の表示状態を変化させることによって画像を表示する表示装置であって、
複数の映像信号線と、前記複数の映像信号線と交差する複数の走査信号線と、前記複数の映像信号線と前記複数の走査信号線との交差点にそれぞれ対応してマトリクス状に配置され各画素に対応する画素電極とを含み、各画素電極に対応する交差点を通過する走査信号線が選択されている時に当該交差点を通過する映像信号線に印加されている映像信号に基づいて当該各画素電極に対応する画素の表示状態が変化する第1の表示部と、
各画素につき少なくとも1ビットのデータを保持することのできる画素メモリが設けられ、前記画素メモリに保持されているデータに基づいて画素の表示状態が変化する第2の表示部と
を備え、
前記第1の表示部と前記第2の表示部とは同一の基板上に形成されていることを特徴とする、表示装置。 - 前記第2の表示部は、
m個(mは正の整数)の画素にそれぞれ対応するように設けられクロックパルスに応じて入力データ信号に基づくデータが順次に転送されるように直列に接続されたm個のフリップフロップからなるシフトレジスタと、
各フリップフロップに対応するように設けられ、各フリップフロップからの出力信号の論理値に応じて第1電圧または第2電圧のいずれかを選択する電圧選択部と、
各フリップフロップに対応するように設けられ、前記電圧選択部によって選択された電圧を各フリップフロップに対応する画素の表示状態に反映させるための表示素子部と
を含むことを特徴とする、請求項1に記載の表示装置。 - 前記第1の表示部に含まれる画素の形状は、前記走査信号線に平行な2つの辺と前記映像信号線に平行な2つの辺とを有する長方形であって、
前記第2の表示部に含まれる画素の形状は、前記走査信号線および前記映像信号線のいずれにも平行でない辺または曲線を含む形状であることを特徴とする、請求項1に記載の表示装置。 - 前記第2の表示部は、前記基板上において前記第1の表示部を取り囲むように形成されていることを特徴とする、請求項3に記載の表示装置。
- 前記第2の表示部は、
m個(mは正の整数)の画素にそれぞれ対応するように設けられクロックパルスに応じて入力データ信号に基づくデータが順次に転送されるように直列に接続されたm個のフリップフロップからなるシフトレジスタと、
各フリップフロップに対応するように設けられ、各フリップフロップからの出力信号の論理値に応じて第1電圧または第2電圧のいずれかを選択する電圧選択部と、
各フリップフロップに対応するように設けられ、前記電圧選択部によって選択された電圧を各フリップフロップに対応する画素の表示状態に反映させるための表示素子部と
を含むことを特徴とする、請求項4に記載の表示装置。 - 前記第2の表示部は、前記シフトレジスタのm段目に対応するフリップフロップからの出力信号または前記入力データ信号の一方を所定の指示信号に基づいて選択して当該選択した信号を前記シフトレジスタの1段目に対応するフリップフロップに与える選択部を更に含み、
前記選択部は、前記入力データ信号に基づくデータが前記m個のフリップフロップに転送された後には、前記シフトレジスタのm段目に対応するフリップフロップからの出力信号を選択することを特徴とする、請求項5に記載の表示装置。 - 前記第2の表示部は、前記シフトレジスタとして、60個の画素にそれぞれ対応するように設けられた60個のフリップフロップからなるシフトレジスタを含み、
前記入力データ信号のレベルは、1回だけ前記クロックパルスの発生間隔に相当する期間第1のレベルとされ、それ以外の期間には第2のレベルとされることを特徴とする、請求項6に記載の表示装置。 - 前記第2の表示部は、前記シフトレジスタとして、60個の画素にそれぞれ対応するように設けられた60個のフリップフロップからなるシフトレジスタを含み、
前記入力データ信号のレベルは、前記クロックパルスが60回発生する毎に前記クロックパルスの発生間隔に相当する期間だけ第1のレベルとされ、それ以外の期間には第2のレベルとされることを特徴とする、請求項5に記載の表示装置。 - 前記第1の表示部は、画素毎または所定個数の画素毎に、前記映像信号線に印加されている映像信号に基づき1ビットのデータを取り込んで保持する記憶回路を更に含み、
前記第1の表示部では、予め定められた表示モードになっている時、前記記憶回路に保持されているデータに基づいて画素の表示状態が変化することを特徴とする、請求項1に記載の表示装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11789531.8A EP2579244A4 (en) | 2010-06-01 | 2011-04-07 | DISPLAY DEVICE |
CN201180012730.8A CN102792364B (zh) | 2010-06-01 | 2011-04-07 | 显示装置 |
JP2012518282A JP5414894B2 (ja) | 2010-06-01 | 2011-04-07 | 表示装置 |
US13/581,357 US9299302B2 (en) | 2010-06-01 | 2011-04-07 | Display device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010125549 | 2010-06-01 | ||
JP2010-125549 | 2010-06-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011152121A1 true WO2011152121A1 (ja) | 2011-12-08 |
Family
ID=45066507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/058765 WO2011152121A1 (ja) | 2010-06-01 | 2011-04-07 | 表示装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US9299302B2 (ja) |
EP (1) | EP2579244A4 (ja) |
JP (1) | JP5414894B2 (ja) |
CN (1) | CN102792364B (ja) |
WO (1) | WO2011152121A1 (ja) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150355487A1 (en) * | 2014-06-06 | 2015-12-10 | Google Technology Holdings LLC | Optimized lcd design providing round display module with maximized active area |
US9781800B2 (en) | 2015-05-21 | 2017-10-03 | Infineon Technologies Ag | Driving several light sources |
US9974130B2 (en) * | 2015-05-21 | 2018-05-15 | Infineon Technologies Ag | Driving several light sources |
US9997010B2 (en) | 2015-12-18 | 2018-06-12 | Ags Llc | Electronic gaming device with external lighting functionality |
US9918367B1 (en) | 2016-11-18 | 2018-03-13 | Infineon Technologies Ag | Current source regulation |
USD843473S1 (en) | 2017-04-07 | 2019-03-19 | Ags Llc | Gaming machine |
US10553167B2 (en) * | 2017-06-29 | 2020-02-04 | Japan Display Inc. | Display device |
USD899526S1 (en) | 2018-02-02 | 2020-10-20 | Ags Llc | Support structure for gaming machine display |
USD939632S1 (en) | 2018-07-17 | 2021-12-28 | Ags Llc | Gaming machine |
USD969926S1 (en) | 2019-04-24 | 2022-11-15 | Ags Llc | Gaming machine |
USD978810S1 (en) | 2019-07-31 | 2023-02-21 | Ags Llc | LED matrix display |
USD969927S1 (en) | 2019-08-02 | 2022-11-15 | Ags Llc | Gaming machine |
US11380157B2 (en) | 2019-08-02 | 2022-07-05 | Ags Llc | Servicing and mounting features for gaming machine display screens and toppers |
CN110930919B (zh) * | 2019-11-20 | 2023-04-21 | 豪威触控与显示科技(深圳)有限公司 | 图像处理方法和显示驱动装置 |
GB2598156B (en) * | 2020-08-21 | 2023-05-31 | Dualitas Ltd | A spatial light modulator |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57211095A (en) * | 1981-06-19 | 1982-12-24 | Akihiro Itou | Electronic watch of analog matrix display |
JPS59187395A (ja) * | 1983-04-08 | 1984-10-24 | セイコーエプソン株式会社 | 記憶型アクテイブパネル |
JPS59188694A (ja) * | 1983-04-11 | 1984-10-26 | セイコーエプソン株式会社 | 記憶型アクテイブパネル |
JPH05241127A (ja) * | 1992-02-28 | 1993-09-21 | Canon Inc | 液晶表示装置 |
JP2002108318A (ja) * | 2000-09-28 | 2002-04-10 | Toshiba Corp | 薄膜半導体表示装置 |
JP2005148453A (ja) * | 2003-11-17 | 2005-06-09 | Toshiba Matsushita Display Technology Co Ltd | 液晶表示装置 |
JP2007286237A (ja) | 2006-04-14 | 2007-11-01 | Sharp Corp | 表示装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63186216A (ja) * | 1987-01-28 | 1988-08-01 | Nec Corp | アクテイブマトリツクス液晶表示器 |
US6252572B1 (en) * | 1994-11-17 | 2001-06-26 | Seiko Epson Corporation | Display device, display device drive method, and electronic instrument |
JPH08179731A (ja) * | 1994-12-26 | 1996-07-12 | Hitachi Ltd | データドライバ、走査ドライバ、液晶表示装置及びその駆動方式 |
TW536689B (en) | 2001-01-18 | 2003-06-11 | Sharp Kk | Display, portable device, and substrate |
JP2004157526A (ja) * | 2002-10-15 | 2004-06-03 | Nec Electronics Corp | コントローラ・ドライバ、表示装置及び表示方法 |
JP3821111B2 (ja) * | 2003-05-12 | 2006-09-13 | セイコーエプソン株式会社 | データドライバ及び電気光学装置 |
KR100965571B1 (ko) * | 2003-06-30 | 2010-06-23 | 엘지디스플레이 주식회사 | 액정표시장치와 그 구동방법 |
JP4731239B2 (ja) | 2005-07-29 | 2011-07-20 | 株式会社 日立ディスプレイズ | 表示装置 |
US7773464B2 (en) * | 2006-10-19 | 2010-08-10 | Rogers Janice L | Elapsed time device |
-
2011
- 2011-04-07 WO PCT/JP2011/058765 patent/WO2011152121A1/ja active Application Filing
- 2011-04-07 CN CN201180012730.8A patent/CN102792364B/zh not_active Expired - Fee Related
- 2011-04-07 US US13/581,357 patent/US9299302B2/en not_active Expired - Fee Related
- 2011-04-07 JP JP2012518282A patent/JP5414894B2/ja not_active Expired - Fee Related
- 2011-04-07 EP EP11789531.8A patent/EP2579244A4/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57211095A (en) * | 1981-06-19 | 1982-12-24 | Akihiro Itou | Electronic watch of analog matrix display |
JPS59187395A (ja) * | 1983-04-08 | 1984-10-24 | セイコーエプソン株式会社 | 記憶型アクテイブパネル |
JPS59188694A (ja) * | 1983-04-11 | 1984-10-26 | セイコーエプソン株式会社 | 記憶型アクテイブパネル |
JPH05241127A (ja) * | 1992-02-28 | 1993-09-21 | Canon Inc | 液晶表示装置 |
JP2002108318A (ja) * | 2000-09-28 | 2002-04-10 | Toshiba Corp | 薄膜半導体表示装置 |
JP2005148453A (ja) * | 2003-11-17 | 2005-06-09 | Toshiba Matsushita Display Technology Co Ltd | 液晶表示装置 |
JP2007286237A (ja) | 2006-04-14 | 2007-11-01 | Sharp Corp | 表示装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2579244A4 * |
Also Published As
Publication number | Publication date |
---|---|
US9299302B2 (en) | 2016-03-29 |
JP5414894B2 (ja) | 2014-02-12 |
CN102792364A (zh) | 2012-11-21 |
US20120319935A1 (en) | 2012-12-20 |
EP2579244A1 (en) | 2013-04-10 |
JPWO2011152121A1 (ja) | 2013-07-25 |
EP2579244A4 (en) | 2013-12-04 |
CN102792364B (zh) | 2015-05-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5414894B2 (ja) | 表示装置 | |
JP5631391B2 (ja) | 表示装置 | |
KR101074402B1 (ko) | 액정표시장치 및 그의 구동방법 | |
WO2013168603A1 (ja) | 走査信号線駆動回路およびそれを備える表示装置 | |
JP5332485B2 (ja) | 電気光学装置 | |
TWI409741B (zh) | 光電裝置及電子機器 | |
KR102230370B1 (ko) | 표시장치 | |
JP2006343563A (ja) | 液晶表示装置 | |
WO2013047363A1 (ja) | 走査信号線駆動回路およびそれを備える表示装置 | |
JP2010190932A (ja) | 表示装置および駆動装置 | |
JP3637898B2 (ja) | 表示駆動回路及びこれを備えた表示パネル | |
JP2011232568A (ja) | 電気光学装置及び電子機器 | |
US11430391B2 (en) | Virtual reality (VR) gate driver changing resolution of display panel based on changing eye focus position | |
KR100774895B1 (ko) | 액정 표시 장치 | |
US20020089476A1 (en) | TFT LCD driver capable of reducing current consumption | |
US20070008265A1 (en) | Driver circuit, electro-optical device, and electronic instrument | |
JP2008216893A (ja) | 平面表示装置及びその表示方法 | |
JP2007171323A (ja) | 電気光学装置、その駆動方法および電子機器 | |
JP2010091968A (ja) | 走査線駆動回路および電気光学装置 | |
WO2020195585A1 (ja) | 表示装置及び検出システム | |
US20170294171A1 (en) | Display device | |
JP2007219205A (ja) | 電気光学装置および電子機器 | |
JP5079777B2 (ja) | 液晶表示装置 | |
JP2011203742A (ja) | 有機エレクトロルミネッセント素子およびその製造方法 | |
JP2011013420A (ja) | 電気光学装置、その駆動方法および電子機器 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180012730.8 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11789531 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012518282 Country of ref document: JP Ref document number: 2011789531 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13581357 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |