WO2004061807A1 - 表示装置 - Google Patents
表示装置 Download PDFInfo
- Publication number
- WO2004061807A1 WO2004061807A1 PCT/JP2003/016353 JP0316353W WO2004061807A1 WO 2004061807 A1 WO2004061807 A1 WO 2004061807A1 JP 0316353 W JP0316353 W JP 0316353W WO 2004061807 A1 WO2004061807 A1 WO 2004061807A1
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- WO
- WIPO (PCT)
- Prior art keywords
- display
- emitting element
- light emitting
- display surface
- pixel electrode
- Prior art date
Links
- 239000000758 substrate Substances 0.000 claims abstract description 94
- 235000019557 luminance Nutrition 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 37
- 239000003086 colorant Substances 0.000 claims description 28
- 239000010409 thin film Substances 0.000 claims description 25
- 230000003287 optical effect Effects 0.000 claims 2
- 239000000463 material Substances 0.000 description 35
- 238000010586 diagram Methods 0.000 description 17
- 239000010408 film Substances 0.000 description 9
- 230000015556 catabolic process Effects 0.000 description 7
- 238000006731 degradation reaction Methods 0.000 description 7
- 238000005070 sampling Methods 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/128—Active-matrix OLED [AMOLED] displays comprising two independent displays, e.g. for emitting information from two major sides of the display
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission
- H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars
- H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/325—Power saving in peripheral device
- G06F1/3265—Power saving in display device
-
- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
-
- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
- H04W52/0267—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by controlling user interface components
- H04W52/027—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by controlling user interface components by controlling a display operation or backlight unit
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0439—Pixel structures
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/16—Details of telephonic subscriber devices including more than one display unit
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to a display device provided with a light-emitting element, and more particularly to a portable information terminal such as a notebook personal computer (hereinafter, referred to as a notebook PC).
- a notebook PC a notebook personal computer
- portable information terminals such as notebook PCs are extremely thin and lightweight, and are easy to carry, so they can be used in relatively small places such as trains and cars, or while walking. Opportunities for use in unstable conditions are increasing. In such an unstable state, it is difficult to open the notebook PC and operate the keys with both hands, so a portable information terminal that can be used easily even while moving is desired. It is rare. Disclosure of the invention
- the display device of the present invention has a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on a surface of the substrate opposite to the one surface of the substrate.
- a display device is characterized in that the first display surface and the second display surface have different emission luminances.
- the display device of the present invention is a display device having a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface. So,
- the double-sided display panel has a plurality of pixels
- Each of the plurality of pixels has a first light emitting element that contributes to display on the first display surface, and a second light emitting element that contributes to display on the second display surface,
- the method is characterized in that it has a means for making the light emission luminance of the first light emitting element different from that of the second light emitting element.
- the display device of the present invention is a display device having a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface. Oh,.
- the double-sided display panel has a plurality of pixels
- Each of the plurality of pixels has a first light emitting element that contributes to display on the first display surface, and a second light emitting element that contributes to display on the second display surface, It is characterized by having means for making the amount of current flowing through the first light emitting element and the amount of current flowing through the second light emitting element different.
- the display device of the present invention has a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on a surface of the substrate opposite to the one surface of the substrate.
- a display device characterized in that the first display surface and the second display surface have different pixel aperture ratios.
- the display device of the present invention is a display device having a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface. So,
- the double-sided display panel has a plurality of pixels
- Each of the plurality of pixels has a first light emitting element that contributes to display on the first display surface, and a second light emitting element that contributes to display on the second display surface,
- the first light emitting element has a first pixel electrode
- the second light emitting element has a second pixel electrode
- the area of the first pixel electrode is different from the area of the second pixel electrode.
- the display device of the present invention is a display device having a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface. So,
- the double-sided display panel has a plurality of pixels, Each of the plurality of pixels has a first light emitting element that contributes to display on the first display surface, and a second light emitting element that contributes to display on the second display surface,
- the first light emitting element has a first pixel electrode
- the second light emitting element has a second pixel electrode
- the display device of the present invention is a display device having a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface. So,
- the double-sided display panel has a plurality of pixels
- Each of the plurality of pixels has a first light emitting element that contributes to display on the first display surface, and a second light emitting element that contributes to display on the second display surface,
- the first light emitting element has a first pixel electrode
- the second light emitting element has a second pixel electrode
- the area of the first pixel electrode is different from the area of the second pixel electrode, and the light emitting device has means for making the amount of current flowing through the first light emitting element and the current flowing through the second light emitting element different. .
- the display device of the present invention has a first display surface on one surface of the substrate, A display device comprising a double-sided display panel having a second display surface on a surface of the substrate opposite to the surface,
- the double-sided display panel has a plurality of pixels
- Each of the plurality of pixels is a first light emitting element that contributes to the display of the first display surface, a second light emitting element that contributes to the display of the second display surface, a first thin film transistor, And two thin film transistors,
- the first light emitting element has a first pixel electrode
- the second light emitting element has a second pixel electrode
- the first pixel electrode is electrically connected to a source or a drain of the first thin film transistor
- the second pixel electrode is electrically connected to a source or a drain of the second thin film transistor
- the first thin film transistor and the second thin film transistor have different channel sizes.
- the display device of the present invention is a display device having a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface. So,
- the double-sided display panel has a plurality of pixels
- Either the first display surface or the second display surface is a multicolor display using light emitting elements of a plurality of colors, and the other is a color display having the highest reliability among the light emitting elements of the plurality of colors. It is a monochrome display using a light emitting element,
- a pixel having the most reliable light emitting element among the plurality of pixels Has a first light-emitting element that contributes to the display of the first display surface and a second light-emitting element that contributes to the display of the second display surface,
- the method is characterized in that it has a means for making the light emission luminance of the first light emitting element different from that of the second light emitting element.
- the display device of the present invention is a display device having a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface. So,
- the double-sided display panel has a plurality of pixels
- Either the first display surface or the second display surface is a multicolor display using light emitting elements of a plurality of colors, and the other is a color display having the highest reliability among the light emitting elements of the plurality of colors. It is a monochrome display using a light emitting element,
- the pixel having the most reliable light emitting element is a first light emitting element that contributes to the display of the first display surface, and a pixel that contributes to the display of the second display surface.
- a second light emitting element is a first light emitting element that contributes to the display of the first display surface, and a pixel that contributes to the display of the second display surface.
- It is characterized by having means for making the amount of current flowing through the first light emitting element and the amount of current flowing through the second light emitting element different.
- the display device of the present invention is a display device having a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface. So,
- the double-sided display panel has a plurality of pixels
- Either the first display surface or the second display surface is a multi-color display using light emitting elements of a plurality of colors, and the other is a light emitting element of the plurality of colors.
- a single-color display using a light-emitting element with a highly reliable color and among the plurality of pixels, a pixel having the most reliable light-emitting element is a pixel which contributes to display on the first display surface. 1 light-emitting element and a second light-emitting element that contributes to the display of the second display surface,
- the first light emitting element has a first pixel electrode
- the second light emitting element has a second pixel electrode
- the area of the first pixel electrode is different from the area of the second pixel electrode.
- the display device of the present invention is a display device having a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface. So,
- the double-sided display panel has a plurality of pixels
- Either the first display surface or the second display surface is a multicolor display using light emitting elements of a plurality of colors, and the other is a color display having the highest reliability among the light emitting elements of the plurality of colors. It is a monochrome display using a light emitting element,
- the pixel having the most reliable light emitting element is a first light emitting element that contributes to the display of the first display surface, and a pixel that contributes to the display of the second display surface.
- a second light emitting element is a first light emitting element that contributes to the display of the first display surface, and a pixel that contributes to the display of the second display surface.
- the first light emitting element has a first pixel electrode
- the second light emitting element has a second pixel electrode
- the area of the pixel electrode of the light emitting element that contributes to the display on the display surface with the higher frequency of use among the first display surface and the second display surface is determined by the frequency of use. Is larger than the area of the pixel electrode of the light emitting element which contributes to the display on the lower display surface.
- the display device of the present invention is a display device having a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface. So,
- the double-sided display panel has a plurality of pixels
- Either the first display surface or the second display surface is a multicolor display using light emitting elements of a plurality of colors, and the other is a color display having the highest reliability among the light emitting elements of the plurality of colors. It is a monochrome display using a light emitting element,
- the pixel having the most reliable light emitting element is a first light emitting element that contributes to the display of the first display surface, and a pixel that contributes to the display of the second display surface.
- a second light emitting element is a first light emitting element that contributes to the display of the first display surface, and a pixel that contributes to the display of the second display surface.
- the first light emitting element has a first pixel electrode
- the second light emitting element has a second pixel electrode
- the area of the first pixel electrode is different from the area of the second pixel electrode, and the light emitting device has means for making the amount of current flowing through the first light emitting element and the current flowing through the second light emitting element different. .
- the display device of the present invention is a display device having a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface. So,
- the double-sided display panel has a plurality of pixels
- Either the first display surface or the second display surface emits light of a plurality of colors.
- a multi-color display using a light-emitting element, and the other is a single-color display using a light-emitting element of the most reliable color among the light-emitting elements of the plurality of colors,
- the pixel having the most reliable light emitting element is a first light emitting element that contributes to the display of the first display surface, and a pixel that contributes to the display of the second display surface.
- the first light emitting element has a first pixel electrode
- the second light emitting element has a second pixel electrode
- the first pixel electrode is electrically connected to a source or a drain of the first thin film transistor
- the second pixel electrode is electrically connected to a source or a drain of the second thin film transistor
- the first thin film transistor and the second thin film transistor have different channel widths with respect to the channel length.
- a display panel applicable to the present invention is a display panel having a plurality of pixels arranged in a matrix. Each of the plurality of pixels has two independent pixel electrodes.
- the display device of the present invention is a display device having a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface. So,
- One of the first display surface and the second display surface may be a multi-color display, and the other may be a single-color display.
- a display panel that can be applied to the present invention may use an electroluminescent device as a light-emitting device.
- the display device of the present invention has a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface.
- Either the first display surface or the second display surface is a multicolor display using light emitting elements of a plurality of colors, and the other is a color display having the highest reliability among the light emitting elements of the plurality of colors. It is characterized by a single-color display using a light-emitting element.
- the display device of the present invention is a display device having a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface. So,
- the display device uses the single-color light-emitting element, and has a color filter on one of the first display surface and the second display surface.
- the display surface of the display panel may include a colored plastic or a mirror type plastic.
- the display device of the present invention has a double-sided display panel having a first display surface on one surface of a substrate and a second display surface on the surface of the substrate opposite to the one surface.
- the display method of the display device according to the present invention has a first display surface on one surface of the substrate.
- a second display surface on a surface of the substrate opposite to the one surface, and a plurality of pixels;
- Each of the plurality of pixels has a double-sided display panel having a first light emitting element that contributes to display on the first display surface and a second light emitting element that contributes to display on the second display surface.
- a display method for a display device wherein the first light emitting element and the second light emitting element have different emission luminances.
- a display method of a display device includes a first display surface on one surface of a substrate, a second display surface on a surface of the substrate opposite to the one surface, and a plurality of pixels.
- Each of the plurality of pixels has a double-sided display panel having a first light emitting element that contributes to display on the first display surface and a second light emitting element that contributes to display on the second display surface.
- a display method of a display device wherein a light-emitting element of a light-emitting element of a first display surface and a second display surface of a display surface having a higher frequency of use has a lower luminance. It is characterized in that the light emission luminance is lower than the light emission luminance of the light emitting element.
- a display method of a display device includes a first display surface on one surface of a substrate, a second display surface on a surface of the substrate opposite to the one surface, and a plurality of pixels.
- Each of the plurality of pixels includes a double-sided display panel having a first light emitting element contributing to display on the first display surface and a second light emitting element contributing to display on the second display surface.
- a display method of a display device The amount of current flowing through the first light emitting element and the amount of current flowing through the second light emitting element are different from each other.
- a display method of a display device includes a first display surface on one surface of a substrate, a second display surface on a surface of the substrate opposite to the one surface, and a plurality of pixels.
- Each of the plurality of pixels has a double-sided display panel having a first light emitting element that contributes to display on the first display surface and a second light emitting element that contributes to display on the second display surface.
- a display method of a display device wherein, of the first display surface and the second display surface, the amount of current flowing to a light-emitting element that contributes to display of a display surface having a higher use frequency is higher than a use frequency. It is characterized in that the current amount is made smaller than the amount of current flowing to the light emitting element which contributes to the display on the display surface having a low level.
- a display method of a display device includes a first display surface on one surface of a substrate, a second display surface on a surface of the substrate opposite to the one surface, and a plurality of pixels.
- the plurality of pixels each include a first light-emitting element contributing to display on the first display surface, and a second light-emitting element contributing to display on the second display surface, and the first The light-emitting element has a first pixel electrode, the second light-emitting element has a second pixel electrode, and an area of the first pixel electrode is different from an area of the second pixel electrode.
- a display method of a display device equipped with a display panel
- the amount of current flowing through the first light emitting element and the amount of current flowing through the second light emitting element It is characterized in that the amounts are different from each other.
- a display method of a display device includes a first display surface on one surface of a substrate, a second display surface on a surface of the substrate opposite to the one surface, and a plurality of pixels.
- the plurality of pixels each include a first light-emitting element contributing to display on the first display surface, and a second light-emitting element contributing to display on the second display surface, and the first The light-emitting element has a first pixel electrode, the second light-emitting element has a second pixel electrode, and the one of the first display surface and the second display surface that is used more frequently is used.
- a table equipped with a double-sided display panel in which the area of the pixel electrode of the light-emitting element that contributes to the display of the display surface of the light-emitting element is larger than the area of the pixel electrode of the light-emitting element that contributes to the display of the less frequently used display surface.
- the amount of current flowing to the light-emitting element that contributes to the display of the most frequently used display surface contributes to the display of the less frequently used display surface. It is characterized in that the current is smaller than the amount of current flowing through the light emitting element.
- FIG. 1 is a diagram showing a portable information terminal having a double-sided display panel provided on a lid.
- FIG. 2 is a diagram showing one pixel configuration of the present invention.
- FIG. 3 is a diagram showing one pixel configuration of the present invention.
- FIG. 4 is a diagram showing one pixel configuration of the present invention.
- FIG. 5 is a diagram showing a cross section of one pixel configuration of the present invention.
- FIG. 2 is a diagram showing a cross section of one pixel configuration of the present invention.
- FIG. 7 is a diagram showing a cross section of a pixel configuration of the present invention.
- FIG. 8 is a diagram in which a light-transmitting plastic is combined with the double-sided display panel of the present invention.
- FIG. 9 is a diagram showing an electronic device to which the double-sided display panel of the present invention can be applied.
- Fig. 10 shows the front display panel.
- FIG. 11 is a diagram showing one pixel configuration of the present invention.
- FIG. 12 is a diagram showing one pixel configuration of the present invention.
- FIG. 13 is a diagram showing a configuration example of a signal line driving circuit.
- FIG. 14 is a diagram showing a configuration example of a signal line driving circuit. BEST MODE FOR CARRYING OUT THE INVENTION
- the first display surface and the second display surface of the double-sided display panel have different emission luminances, so that the light-emitting elements of the first display surface and the second display surface are different.
- FIG. 10 (A) is a diagram showing a double-sided display panel
- FIG. 10 (B) is a diagram of FIG. It is a figure showing a surface. 10001 is a substrate, 10002 is a source signal line drive circuit, 10003 is a first gate signal line drive circuit, and 10004 is a second gate signal line drive circuit.
- the double-sided display panel has a first display surface 10005 on one surface of a substrate 10001, and a second display surface 10006 on the surface of the first display surface 10005 and the surface of the substrate 10001.
- the first display surface 10005 displays in the direction of arrow 10007
- the second display surface 10006 displays in the direction of arrow 10008.
- FIG. 10 shows an example of a double-sided display panel, and the number of source signal line driving circuits and the number of gate signal line driving circuits, and the positions at which they are provided can be changed as appropriate. .
- FIG. 1 An example of a cross-sectional structure of one pixel of the double-sided display panel is shown in FIG.
- one pixel is one of R, G, and B.
- a region formed by light-emitting elements of any one color is shown.
- 5101 is a first driving TFT
- 5102 is a second driving TFT
- 5103 is a first pixel electrode using a reflective material or the like
- 5104 is a light-transmitting material or the like.
- Reference numeral 5112 denotes a first light emitting element
- 5113 denotes a second light emitting element.
- the first display area 5108 and the second display area 5109 have the same area.
- the first light emitting element 5112 is composed of the first pixel electrode 5103, the EL layer 5105, and the counter electrode 5106
- the second light emitting element 5113 is composed of the second pixel electrode 5104, the EL layer 5105, the counter electrode 5106, and the like. Power.
- the first Light emission of the first light-emitting element 5112 in the display region 5108 contributes to display on the first display surface
- light emission of the second light-emitting element 5113 in the second display region 5109 corresponds to light emission of the second display surface. It contributes to the display.
- the first display region 5108 current flows between the first pixel electrode 5103 and the counter electrode 5106 connected to the first driving TFT 5101, and the EL layer 5105 in the first display region 5108 emits S light.
- the first pixel electrode 5103 uses a reflective material and the counter electrode 5106 uses a light-transmitting material, light is emitted from the EL layer 5105 in the direction of the counter electrode (the direction of the arrow 5110). . That is, the first light emitting element 5112 emits light in the direction of the arrow 5110.
- a translucent material refers to, for example, a transparent conductive film such as ITO or aluminum formed to have a thickness capable of transmitting light
- a reflective material refers to, for example, a light reflecting aluminum such as aluminum.
- a conductive material having the following properties shall be indicated. .
- the double-sided display panel shown in FIG. 5A is characterized by having two independent pixel electrodes (a first pixel electrode and a second pixel electrode).
- FIG. 1 shows a case in which the double-sided display panel shown in FIG. 5 (A) is provided on the lid of a portable information terminal so that display can be performed on both sides of the lid.
- Fig. 1 (A) shows the notebook PC open
- Fig. 1 (B) shows the notebook PC closed.
- the notebook PC has a first housing (lid portion) 1001 and a second housing 1002, the first housing 1001 has a double-sided display panel, and the second housing 1002 has operation keys 1004 and the like.
- the double-sided display panel has a first display surface 1003 on the front surface and a second display surface 1101 on the back surface.
- the notebook PC When the notebook PC is used in an open state (Fig. 1 (A)), the first display surface 1003 is displayed, and when the cover 1001 is closed, the second display surface 1101 is displayed. State.
- the case where the notebook PC is opened and used is The light-emitting element that contributes to the display on the first display surface 1003 (corresponding to the first light-emitting element 5112 in FIG. 5A) is used on the second display surface 1101 because it is more frequently used.
- the speed of luminance degradation is higher than that of the light emitting element that contributes to the luminance (corresponding to the second light emitting element 5113 in FIG.
- the light emitting element cannot be used first.
- the light-emitting element contributing to the display on the second display surface 1101 has not deteriorated in luminance and can be used sufficiently, it cannot be used as a notebook PC.
- the light emitting elements contributing to the display in the first display area and the light emitting elements contributing to the display in the second display area can be made to have substantially the same rate of luminance deterioration, the length of the double-sided display panel The service life can be extended. Therefore, light-emitting elements that contribute to the display on the first display surface (Fig. 5 The amount of current flowing to the first light-emitting element 5112) in FIG.
- the light-emitting element (second light-emitting element 5113 in FIG. 5A) that contributes to display on the second display surface is smaller than the amount of current flowing to the light-emitting element (second light-emitting element 5113 in FIG. 5A) that contributes to display on the second display surface.
- the emission luminance of the light-emitting element (the first light-emitting element 5112 in FIG. 5A) which contributes to the display on the first display surface 1003 can be reduced by the display on the second display surface 1101.
- the luminance lower than the light emission luminance of the light emitting element that contributes to the light emission (the second light emitting element 5113 in FIG. 5A)
- the light emission that contributes to the display of the first display surface and the second display surface is reduced. It is possible to reduce the difference in the luminance degradation speed of the element.
- the channel size of the first driving TFT 5101 may be smaller than the channel size (channel width / channel length) of the second driving TFT 5102.
- Vgs 1 the voltage between the gate and the source of the first driving TFT 5101
- Vgs 2 the voltage between the gate and the source of the second driving TFT 5102
- I Vg Sl I ⁇ I Vgs 2 I the amount of current flowing through the first light emitting element 5112 can be made smaller than the amount of current flowing through the second light emitting element 5113.
- FIG. 11 a portion surrounded by a dotted line frame 11011 is one pixel, 11001 is a first source signal H, 11002 is a gate signal line, 11003 is a current supply line, 11004 is a first switching TFT, 11 005f for the first driving TFT, 11006 for the second driving TFT, 11007 for the first light emitting element, 11008 for the second light emitting element, 11009, the counter electrode, and 11 012 for the second switching TFT
- Reference numeral 11013 denotes a second source signal line.
- the area where the light emitted from the first light emitting element 11007 is obtained is the first display area
- the area where the light emitted from the second light emitting element 11008 is obtained is the second display area.
- the gate electrode of the first switching TFT 1004 is electrically connected to the gate signal line 11002
- the first electrode is electrically connected to the first source signal line 11001
- the second electrode is It is electrically connected to the gate electrode of the driving TFT 11005.
- the gate electrode of the second switching TFT 11012 is electrically connected to the gate signal line 11002
- the first electrode is electrically connected to the second source signal line 11013
- the second electrode is It is electrically connected to the gate electrode of the second driving TFT 11006.
- the first electrode of the first driving TFT 11005 is electrically connected to the current supply line 11003, and the second electrode is electrically connected to the first electrode of the first light emitting element 110007. I have.
- the first electrode of the second driving TFT 11006 is electrically connected to the current supply line 11003, and the second electrode is electrically connected to the first electrode of the second light emitting element 11008.
- the second electrode of the first light emitting element 11007 and the second electrode of the second light emitting element 11008 The electrodes are electrically connected to the current supply lines and the counter electrodes 11009 and 11010 having a potential difference from each other.
- FIG. 12 a portion surrounded by a dotted line frame 12011 is one pixel, 12001 is a source signal line, 12002 is a gate signal line, 12003 is a first current supply line, 12004 (a TFT for switching, 12005).
- the area where the light emitted from the first light emitting element 12007 is obtained is the first display area
- the area where the light emitted from the second light emitting element 12008 is obtained is the second display area.
- the gate electrode of the switching TFT 12004 is electrically connected to the gate signal line 12002
- the first electrode is electrically connected to the source signal line 12001
- the second electrode is the first driving TFT 12005. It is electrically connected to the gate electrode.
- the first electrode of the first driving TFT 1200 5 is electrically connected to the first current supply line 12003
- This electrode is electrically connected to the first electrode of the first light emitting element 12007.
- the first electrode of the second driving TFT 12006 is electrically connected to the second current supply line 12012, and the second electrode is electrically connected to the first electrode of the second light emitting element 12008.
- the second electrode of the first light-emitting element 12007 and the second electrode of the second light-emitting element 12008 are electrically connected to the current supply line and the counter electrodes 12009 and 12010 having a potential difference from each other. . If the potential applied from the first current supply line 12003 to the first electrode of the first drive TFT 12005 is different from the potential applied from the second current supply line 12012 to the first electrode of the second drive TFT 12006 By doing so, it is possible to satisfy I Vg Sl I ⁇ I Vgs 2 I.
- the both display surfaces of the double-sided display panel are reduced.
- the difference in the rate of luminance degradation of the light emitting element caused by the difference in the frequency of use can be reduced, and the life of the double-sided display panel can be extended.
- the present invention when the notebook PC is open, the first display surface is displayed, and when the notebook PC is closed, the second display surface is displayed (when the first display surface is closed). Is more frequently used), but the present invention is not limited to this. It would be better if the light emission luminance of the display surface with the higher frequency of use could be lower than the light emission luminance of the display surface with the lower frequency of use. Further, in the present embodiment, the notebook PC has been described as an example of the portable information terminal, but the present invention is not limited to the notebook PC.
- the first display surface of the double-sided display panel, other than a notebook PC The display panel of the present invention can be applied as long as the usage mode is different between the second display surface and the second display surface.
- the multi-color display method of the double-sided display panel of the present invention is, of course, an RGB coating method in which EL layers emitting R, G, and B colors are applied separately, and a color is applied to an EL layer for emitting white light.
- a known multicolor display method such as a color filter method of combining filters and a color conversion method of combining a color conversion layer with a blue light-emitting EL layer may be used.
- FIG. 13 shows a first configuration example of the signal line drive circuit.
- FIG. 13 shows that when the same display is performed on the first display surface and the second display surface, the first source signal line 11001 and the second source signal line 11013 in FIG. 11 have different potentials.
- 1 is a configuration example of a signal line driving circuit for supplying a video signal, and shows a signal line driving circuit of an active matrix type double-sided display panel of m rows ⁇ n columns.
- 13001 is a D flip-flop (D-FF)
- 13002 is a shift register
- 13003a is a first latch circuit (LAT1)
- 13003b is a second latch circuit (LAT2)
- 13004 is a level shifter (LS)
- 13005 indicates a buffer.
- S-CK indicates a clock signal
- S-CKb indicates a clock inversion signal
- S-SP indicates a start pulse
- Digital Video indicates a digital video signal
- Latch Pulse indicates a latch pulse.
- the LSI is a first level shifter
- LS2 is the second level shifter
- buffer 13005 where Buffer1 indicates the first buffer and Buffer2 indicates the second buffer.
- the first level shifter and the second level shifter are connected to the output of the second latch circuit
- the output of the first level shifter is connected to the input of the first buffer
- the second level shifter is connected to the output of the first buffer.
- the output of is connected to the input of the second buffer.
- the first shift register and the first buffer are connected to the same power supply, and the second shift register and the second buffer are different from the power supply to which the first shift register and the first buffer are connected. Connected to power.
- the shift register 13002 is configured D- flip-up 13001 Power et n stages, the clock signal (S-CK), start Nono 0 Noresu (S- SP), the clock inverted signal (S- CKb) is input. Sampling pulses are sequentially output in accordance with the timing of these signals.
- the sampling pulse output from the shift register 13002 is input to the first latch circuit 13003a.
- a digital video signal Digital Video
- the video signal is held in each column according to a timing at which a sampling pulse is input.
- a latch pulse (Latch Pulse) is input to the second latch circuit 13003b during the horizontal retrace period, and the first latch circuit 13003a Are simultaneously transferred to the second latch circuit 13003b.
- the held video signal is subjected to pulse amplitude conversion in two level shifters connected from the respective outputs of the second latch circuit, and subsequently, the video signal waveform is shaped in the buffer. After that, they are output to the respective source signals HSll to Snl and S12 to Sn2.
- the source signal line Sll indicates the first source signal line in the first column
- Snl indicates the first source signal line of the nth IJ.
- the source signal line S12 indicates the second source signal line in the first column
- Sn2 indicates the second source signal line of the nth IJ-th line.
- the first shift register and the first buffer are connected to the same power supply, and the second shift register and the second buffer are connected to the first shift register and the first buffer. Since the buffer is connected to a power supply different from the power supply to which the buffer is connected, video signals having different potentials can be supplied to the first source signal line and the second source signal line.
- the first source signal line 1 1 00 1 and the second source signal line 1 1 0 1 3 It is needless to say that a video signal having a different potential can be supplied to the digital gray scale method.
- FIG. 14 shows a second configuration example of the signal line driving circuit.
- FIG. 14 is an example of a configuration of a source signal line driving circuit when different displays are performed on the first display surface and the second display surface, and the signals of an active matrix type double-sided display panel having m rows and X n columns are shown.
- 3 shows a line drive circuit.
- reference numeral 1400 1 denotes a D-flip flop (D-FF), a 1402 shift register, 14003 & a first latch circuit (LAT 1), 14003b and a second latch circuit.
- LAT2 indicates a level shifter (LS)
- LS level shifter
- 14005 indicates a buffer.
- LSI indicates a first level shifter
- LS2 indicates a second level shifter
- a buffer 14005 where Buffer 1 indicates a first buffer and Buffer 2 indicates a second buffer.
- the first level shifter and the second level shifter are connected to the outputs of the second latch circuits of different stages, respectively.
- the output of the first level shifter is connected to the input of the first buffer
- the output of the second level shifter is connected to the input of the second buffer.
- the first shift register and the first buffer are connected to the same power supply
- the second shift register and the second buffer are connected to a power supply different from the power supply to which the first shift register and the first buffer are connected. Have been.
- S-CK indicates a clock signal
- S-CKb indicates a clock inversion signal
- S-SP indicates a start noise
- Digital Video indicates a digital video signal
- Latch Pulse indicates a latch pulse.
- the shift register 14002 is composed of 2ri-stage D-flip-flops 14001, and receives the clock signal (S-CK), start pulse (S-SP), and inverted clock signal (S-CKb). Sampling pulses are sequentially output in accordance with the timing of these signals.
- the sampling pulse output from the shift register 13002 is input to the first latch circuit 13003a.
- a digital video signal (Digital Video) is input to the first latch circuit 13003a, and a video signal is held in each column in accordance with a timing at which a sampling pulse is input.
- the first latch circuit 13003a when the holding of the video signal to the last column is completed, a latch pulse (Latch Pulse) is input to the second latch circuit 13003b during the horizontal retrace period, and the first latch circuit 13003b
- the video signal held in 13003a is simultaneously transferred to the second latch circuit 13003b.
- the held video signal is subjected to pulse amplitude conversion in a level shifter, and then, after a video signal waveform is shaped in a buffer, output to the respective source signal lines Sll to Snl and S12 to Sn2.
- the source signal Kaizumi S11 indicates the first source signal line of the first column
- Snl indicates the first source signal line of the nth system. Is shown.
- the source signal line S12 indicates the second source signal line in the first column
- Sn2 indicates the second source signal line in the Uth line.
- the first shift register and the first buffer are connected to the same power supply, and the second shift register and the second buffer are connected to the first shift register and the first buffer. Since the buffer is connected to a power supply different from the power supply to which the buffer is connected, video signals having different potentials can be supplied to the first source signal line and the second source signal line.
- the second configuration example of the signal line driver circuit is different from the first configuration in that video signals to be supplied to the first source signal line and the second source signal line are generated from different digital video signals. Different from the example, different images can be displayed on the first display surface and the second display surface.
- video signals having different potentials can be supplied to the first source signal 11001 and the second source signal / line 1 101 3.
- an example in the case of the digital gray scale method is shown.
- different potentials are applied to the first source signal line 1 1001 and the second source signal line 1 10 13. It is needless to say that it is possible to supply a certain video signal, and it is not limited to the digital gradation method.
- the first display surface and the second display surface of the double-sided display panel have different emission luminances, so that the light-emitting elements of the first display surface and the second display surface are different.
- a second example of correcting a difference in luminance degradation speed will be described. Specifically, in a double-sided display panel, the first display surface and the second display surface By making the aperture ratios different from each other, the difference in the deterioration speed of the light emitting element between the first display surface and the second display surface is corrected.
- FIG. 5 (B) is a cross-sectional view of a double-sided display panel for one pixel in an example in which the aperture ratio of each pixel is different between the first display surface and the second display surface.
- the aperture ratio of each pixel is different between the first display surface and the second display surface, that is, the area of the pixel electrode that contributes to EL emission per pixel is determined by the first display surface and the second display surface.
- reference numeral 5001 denotes a first driving TFT
- 5002 denotes a second driving TFT
- 5003 denotes a first pixel electrode using a reflective material or the like
- 5004 denotes a translucent material or the like.
- 505 is an EL layer
- 5006 is a counter electrode using a translucent material or the like
- 5007 is a reflective film using a reflective material
- 5008 is a first display area
- 5009 Denotes a second display area
- 5012 denotes a first light emitting element
- 5013 denotes a second light emitting element.
- the light emission of the first light-emitting element 50 12 in the first display region 5008 contributes to display on the first display surface
- the second light-emitting element in the second display region 5011 The emission of 50 13 contributes to the display on the second display surface.
- the first display area 5008 current flows between the first pixel electrode 5003 and the counter electrode 5006 connected to the first driving TFT 5001, and the EL layer 5005 in the first display area 5008 emits S light. .
- the first pixel electrode 5003 uses a reflective material and the counter electrode 5006 uses a translucent material, light is emitted from the EL layer 5005 in the direction of the counter electrode (the direction of the arrow 5010). Is emitted. That is, The first light emitting element 5012 emits light in the direction of arrow 5010.
- the second display area 5009 a current flows between the second pixel electrode 5004 connected to the second driving TFT 5002 and the counter electrode 5006, and the EL layer 5005 of the second display area 5009 emits light. I do.
- the second pixel electrode 5004 is formed using a light-transmitting material and the reflective film 5007 is formed on the counter electrode 5006 in the second display area 5009, the EL layer 5005 Light is emitted in the direction of the second pixel electrode 5004 (the direction of arrow 5011). That is, the second light emitting element 501 3 emits light in the direction of the arrow 501 1.
- the light-emitting element that contributes to display on the first display surface and the second display surface can have different current densities.
- a light emitting element that contributes to display on a display surface that is used frequently has a lower current density than a light emitting element that contributes to display on a display surface that is used less frequently.
- FIG. 5B illustrates an example in which the area of the first pixel electrode 5003 is smaller than the area of the second pixel electrode 5004; however, the present invention is not limited to this.
- the current density of the frequently used display surface is lower than the current density of the less frequently used display surface. If the aperture ratio of the first pixel electrode 5003 can be made smaller than that of the first pixel electrode 5003, that is, if the aperture ratio of the display surface with high frequency of use can be made higher than the aperture ratio of the display surface with low frequency of use. It may be larger than the area of the pixel electrode 5004.
- This embodiment can be implemented in combination with the first embodiment. That is, both the aperture ratio and the light emission luminance of the first display surface and the second display surface can be different from each other. If the aperture ratio of the display surface that is used more frequently is higher and the light emission luminance of the display surface that is used more frequently is lower, the difference in the deterioration speed of the display surfaces can be reduced. By making both the light emission luminance and the aperture ratio different from each other in this manner, the light emission luminance of the display surface that is used more frequently can be increased as compared with the case where only the light emission luminance is made different from each other.
- Embodiment 4 shows a circuit configuration for controlling display / non-display of the first display surface and the second display surface of the double-sided display panel.
- FIG. 2 shows a circuit diagram of an embodiment of the present invention.
- a thin film transistor TFT
- MOS transistor an organic transistor, a molecular transistor, and the like can be given, and any of them may be used similarly.
- the TFT one of a source region and a drain region is described as a first electrode, and the other is described as a second electrode.
- an area surrounded by a dotted frame 201 1 is one pixel, and a source signal line 2001, a gate signal line 2002, a current supply line 2003, a switching TFT 2 004, a first driving TFT 2005, a second driving TFT 2006, a first light emitting element 2007, and a second light emitting element 2008.
- the area where the light emitted from the first light emitting element 2007 is obtained is the first display area
- the area where the light emitted from the second light emitting element 2008 is obtained is the second display area.
- the gate electrode of the switching TFT 2004 is electrically connected to the gate signal line 2002, the first electrode is electrically connected to the source signal line 2001, and the second electrode is the first and second drive lines. It is electrically connected to the gate electrodes of TFT2005 and 2006.
- the first electrode of the first driving TFT 2005 is electrically connected to the current supply line 2003, and the second electrode is electrically connected to the first electrode of the first light emitting element 2007.
- the first electrode of the second driving TFT 2006 is electrically connected to the current supply line 2003, and the second electrode is electrically connected to the first electrode of the second light emitting element 2008.
- the second electrode of the first light emitting element 2007 and the second electrode of the second light emitting element 2008 are electrically connected to the counter electrodes 200 9 and 20 10 having a potential difference from the current supply line, respectively. It is connected to the.
- the video signal output to the source signal line 2001 is input to the gate electrodes of the first and second driving TFTs 2005 and 2006 at the timing when the switching TFT 2004 is turned on, and according to the video signal, Current is supplied to the first and second light emitting elements 2007 and 2008 to emit light.
- Current is supplied to the first and second light emitting elements 2007 and 2008 to emit light.
- display is performed on both the first display surface and the second display surface. According to this configuration, control of light emission and non-light emission of the first light emitting element 2007 and the second light emitting element 2008 is performed by the first and second driving TFTs 2005 and 2006.
- the first and second analog switches 3009 By providing ON and OFF by the display surface control signal 3 0 13 to provide the first analog switch 300 9 for a certain period, the current is supplied to the first light emitting element 3007. An image is displayed in the first display area.
- the second analog switch 3010 that operates exclusively with the first analog switch 3009 is OFF at this time, and cuts off the current supply path to the second light emitting element 3008. Therefore, the second display area does not emit light. That is, the display is being performed on the first display surface, and the display is not being performed on the second display surface.
- the second analog switch 3010 is turned on, the current is supplied to the second light emitting element 3008, and the first analog switch 3009 is turned off during the period when an image is displayed in the second display area. Then, the current supply path to the first light emitting element 3007 is cut off. Therefore, the first display area does not emit light. That is, the display is being performed on the second display surface, and the display is not being performed on the first display surface. At this time, the display surface control signal is output when the user performs some operation, and the display surface may be switched or may be used (for example, whether the portable information terminal or the like is folded). The switching operation may be performed automatically depending on whether it is open or not. Also, instead of operating the first and second analog switches 3009 and 3010 exclusively, as shown in FIG.
- the first display surface control signal 4003 and the second display surface control signal 4004 are And may be controlled independently. According to this configuration, both the first display area and the second display area can be arbitrarily switched between display and non-display. That is, display / non-display of the first display surface and the second display surface can be arbitrarily switched.
- the first display area and the second display area use the first frame in an odd frame.
- the display surface control signal may be inverted every frame period, and the first and second analog switches 400 1 and 400 2 may be switched ON'OFF for each frame alternately.
- the first display surface is a multi-color display
- the second display surface is a single-color display, so that the luminance of the light emitting elements on the first display surface and the second display surface is deteriorated.
- An example of correcting the difference in speed will be described.
- FIG. 6 (A) is a cross-sectional view of one pixel of a panel example in which only one of the first and second display surfaces emits light.
- 600 1 is the drive A TFT for operation
- 6002 is a pixel electrode using a translucent material
- 6003 is an EL
- 6004 is a counter electrode using a reflective material
- 6005 is a display area.
- the display area 6005 current flows between the pixel electrode 6002 connected to the driving TFT 6001 and the counter electrode 6004, and the EL layer 6003 emits light.
- the pixel electrode 6002 uses a translucent material and the counter electrode 6004 uses a reflective material, light is emitted from the EL layer 6003 toward the pixel electrode.
- FIG. 6 (B) is a diagram showing an example in which the first display surface and the second display surface emit light.
- reference numeral 6101 denotes a first driving finger 1 ⁇ 6102 denotes a second driving TFT
- 6103 denotes a first pixel electrode using a reflective material
- 6104 denotes a second pixel electrode using a translucent material.
- a current flows between the first pixel electrode 6103 connected to the first driving TFT 6101 and the counter electrode 6106, and the EL layer 6105 of the first display region 6108 It emits light.
- the first pixel electrode 6103 uses a reflective material and the counter electrode 6106 uses a translucent material, light is emitted from the EL layer 6105 in the direction of the counter electrode 6106 (the direction of the arrow 6110). Is emitted.
- the second display region 6109 a current flows between the second pixel electrode 6104 connected to the second driving TFT 6102 and the counter electrode 6106, and the EL layer 6105 of the second display region 6109 has a force S Emits light.
- the second pixel electrode 6104 is formed of a light-transmitting material and the reflection film 6107 is formed on the counter electrode 6106, the second pixel electrode 6105 is driven in the direction of the second pixel electrode 6104 ( Arrow 61 1 towards 1 Direction).
- the present invention is not limited to this.
- the display may be emitted from the EL layer in the direction of the counter electrode, and the monochrome display may be emitted from the EL layer in the direction of the pixel electrode.
- This embodiment can be implemented in combination with Embodiments 1 to 4.
- the first display surface is a multi-color display using a color filter
- the second display surface is a single-color display
- FIG. 8 shows a cross-sectional view of the double-sided display panel of the present embodiment shown in FIG.
- 7001 mm is the first driving TFT
- 7002 f is the second driving TFT
- 7003 is the first pixel electrode using a reflective material
- 7004 is the translucent material.
- the second pixel electrode used, 7005 is an EL layer
- 7006 is a counter electrode using a translucent material
- 7007 is a reflective film using a reflective material
- 7008 is a color filter
- 7009 is the first 7010 indicates a second display area.
- a current flows between the first pixel electrode 7003 and the counter electrode 7006 connected to the first driving TFT 7001, and the EL layer 7005 in the first display area 7009 It emits light.
- the first pixel electrode 7003 uses a reflective material and the counter electrode 7006 uses a light-transmitting material, light is emitted from the EL layer 7005 in the direction of the counter electrode (the direction of the arrow 7011).
- a current flows between the second pixel electrode 7004 connected to the second driving TFT 7002 and the counter electrode 7006, and the EL of the second display area 7010 Layer 7005 emits light.
- a light-transmitting material is used for the second pixel electrode 7004, and a reflective film 7007 is formed over the counter electrode 7006 in the second display region. Light is emitted in the direction (the direction of arrow 7012).
- the first display surface has a multicolor display because the first display surface has a color filter, and no color filter is formed on the second display surface. Therefore, the second display surface is displayed in white.
- This embodiment can be implemented in combination with Embodiments 1 to 4.
- the notebook PC is opened (FIG. 1A) and the operation is performed using the operation keys 1004. Further, the second display surface 1101 is provided with a touch panel, and even when the notebook PC is closed, the touch panel can be used and operated, which is convenient for use during moving or the like. .
- This embodiment can be implemented in combination with Embodiments 1 to 6.
- the double-sided display panel 8001 includes a source signal line driving circuit 8002, a first gate signal line driving circuit 8003, a second gate signal line driving circuit 8004, a first display surface 8005 on the front surface, a second display surface 8008 on the back surface, and the like. Having.
- FIG. 8A illustrates an example of attaching a first light-transmitting plastic 8006 and a second light-transmitting plastic 8007 to a double-sided display panel 8001, and FIG. 2) shows a cross-sectional view taken along aa ′ of the example shown in FIG.
- the first light-transmitting plastic 8006 and the second light-transmitting plastic 8007 are desirably colored, and when no image is displayed, the source signal line driver circuit 8002 on the double-sided display panel 8001 First gate signal line
- the patterns of the driving circuit 8003, the second gate signal line driving circuit 8004, the first display surface 8005, the second display surface 8008, and the like are difficult to see from the outside.
- FIG. 8C shows an example in which an image is displayed from the double-sided display panel 8001 through the first translucent plastic 8006.
- the EL is emitted. Only the part appears to rise.
- the second display surface 8008 side of the back surface The same applies to the second display surface 8008 side of the back surface.
- the double-sided display panel 8001 can be protected by pasting plastic.
- the first light-transmitting plastic 8006 and the second light-transmitting plastic 8007 are preferably colored, but may be mirror-surfaced.
- a display portion or the like formed in advance on a substrate such as glass may be transferred onto the translucent plastic using a transfer technique, or sealed.
- the translucent plastic may be used as the stop substrate.
- a light-transmitting plastic may be used as a housing to cover the entire double-sided display panel, or light-transmitting plastic may be used as a case for a double-sided display panel.
- This embodiment can be implemented in combination with Embodiment Modes 1 to 7.
- the display device of the present invention can be used for display units of various electronic devices. Mopile devices that are often used in unstable conditions, especially when moving It is desirable to use the display device of the present invention.
- examples of the electronic device include a portable information terminal (a mobile phone, a mobile computer, a portable game machine, an electronic book, or the like), a video camera, a digital camera, and the like.
- a portable information terminal a mobile phone, a mobile computer, a portable game machine, an electronic book, or the like
- a video camera a digital camera, and the like.
- FIG. 9 shows specific examples of these electronic devices.
- FIG. 9A illustrates a mobile phone, which includes a main body 9001, an audio output portion 9002, an audio input portion 9003, a double-sided display panel 9004, an operation switch 9005, an antenna 9006, and the like.
- the display device of the present invention can be used for a double-sided display panel 9004.
- FIG. 9B illustrates a PDA (Personal Digital Assistant), which includes a first housing 9101, a double-sided display panel 9102, a second housing 9103, an operation switch 9104, and the like.
- the display device of the present invention can be used for the double-sided display panel 9102. As described above, the applicable range of the display device of the present invention is extremely wide, and the display device can be used for electronic devices in various fields.
- This embodiment can be implemented in combination with Embodiment Modes 1 to 7 and Embodiment 1. Industrial applicability
- a double-sided display panel having a first display surface on a front surface and a second display surface on a back surface is used for a lid of the portable information terminal such as the notebook PC,
- the aperture ratio and light emission luminance may be different from each other, or any one of the first display surface and the second display surface may be used.
- One is multicolored and the other is By using a single color, it is possible to provide a portable information terminal that achieves a longer life of the entire EL element and lower power consumption.
- the double-sided display panel on the lid of a portable information terminal such as a notebook PC
- a touch panel function it can be easily operated even with the lid of the portable terminal such as a PC closed. Therefore, it can be easily used even while moving.
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- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Human Computer Interaction (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of El Displays (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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KR1020057012143A KR101170344B1 (ko) | 2002-12-27 | 2003-12-19 | 표시 장치 |
AU2003289446A AU2003289446A1 (en) | 2002-12-27 | 2003-12-19 | Display device |
KR1020117023078A KR101179155B1 (ko) | 2002-12-27 | 2003-12-19 | 표시 장치 |
KR1020127020487A KR101255532B1 (ko) | 2002-12-27 | 2003-12-19 | 표시 장치 |
KR1020127005026A KR101245125B1 (ko) | 2002-12-27 | 2003-12-19 | 표시 장치 |
JP2004544178A JP4646630B2 (ja) | 2002-12-27 | 2003-12-19 | 表示装置 |
Applications Claiming Priority (2)
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JP2002379297 | 2002-12-27 | ||
JP2002-379297 | 2002-12-27 |
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WO2004061807A1 true WO2004061807A1 (ja) | 2004-07-22 |
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PCT/JP2003/016353 WO2004061807A1 (ja) | 2002-12-27 | 2003-12-19 | 表示装置 |
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US (4) | US7221092B2 (ja) |
JP (5) | JP4646630B2 (ja) |
KR (4) | KR101170344B1 (ja) |
CN (1) | CN100504966C (ja) |
AU (1) | AU2003289446A1 (ja) |
WO (1) | WO2004061807A1 (ja) |
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JP2005157267A (ja) * | 2003-11-27 | 2005-06-16 | Samsung Sdi Co Ltd | 有機電界発光表示装置及びその駆動方法 |
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JP2012164663A (ja) * | 2005-09-30 | 2012-08-30 | Semiconductor Energy Lab Co Ltd | 表示装置、発光モジュール及び電子機器 |
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US10043849B2 (en) | 2005-09-30 | 2018-08-07 | Semiconductor Energy Laboratory Co., Ltd. | Display device and electronic device that expands color reproduction area by satisfying the surplus in the color gamut |
JP2011514538A (ja) * | 2008-02-21 | 2011-05-06 | シャープ株式会社 | ディスプレイ |
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CN102809987A (zh) * | 2011-06-01 | 2012-12-05 | 康准电子科技(昆山)有限公司 | 手提式电脑 |
JP2018026593A (ja) * | 2012-01-20 | 2018-02-15 | 三星ディスプレイ株式會社Samsung Display Co.,Ltd. | 有機発光表示装置 |
CN114220936A (zh) * | 2021-12-16 | 2022-03-22 | 云谷(固安)科技有限公司 | 一种显示面板和显示装置 |
CN114220936B (zh) * | 2021-12-16 | 2023-12-19 | 云谷(固安)科技有限公司 | 一种显示面板和显示装置 |
Also Published As
Publication number | Publication date |
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JP4646630B2 (ja) | 2011-03-09 |
KR101179155B1 (ko) | 2012-09-07 |
JP4675431B2 (ja) | 2011-04-20 |
KR101245125B1 (ko) | 2013-03-26 |
JP2010211218A (ja) | 2010-09-24 |
US20150144973A1 (en) | 2015-05-28 |
JP2010217899A (ja) | 2010-09-30 |
US9111842B2 (en) | 2015-08-18 |
KR20110116255A (ko) | 2011-10-25 |
JPWO2004061807A1 (ja) | 2006-05-18 |
US20070188422A1 (en) | 2007-08-16 |
KR20120046295A (ko) | 2012-05-09 |
JP4877879B2 (ja) | 2012-02-15 |
JP4675430B2 (ja) | 2011-04-20 |
US20040263425A1 (en) | 2004-12-30 |
US7221092B2 (en) | 2007-05-22 |
KR101255532B1 (ko) | 2013-04-24 |
US8242979B2 (en) | 2012-08-14 |
KR101170344B1 (ko) | 2012-08-02 |
KR20120104416A (ko) | 2012-09-20 |
US20130032808A1 (en) | 2013-02-07 |
CN1732494A (zh) | 2006-02-08 |
JP2010224545A (ja) | 2010-10-07 |
JP5111550B2 (ja) | 2013-01-09 |
JP2010212246A (ja) | 2010-09-24 |
US8947325B2 (en) | 2015-02-03 |
CN100504966C (zh) | 2009-06-24 |
KR20050085916A (ko) | 2005-08-29 |
AU2003289446A1 (en) | 2004-07-29 |
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