WO2008004290A1 - Écran plat - Google Patents

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Publication number
WO2008004290A1
WO2008004290A1 PCT/JP2006/313411 JP2006313411W WO2008004290A1 WO 2008004290 A1 WO2008004290 A1 WO 2008004290A1 JP 2006313411 W JP2006313411 W JP 2006313411W WO 2008004290 A1 WO2008004290 A1 WO 2008004290A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
display device
flat panel
panel display
unit
Prior art date
Application number
PCT/JP2006/313411
Other languages
English (en)
Japanese (ja)
Inventor
Masaaki Yoshida
Yuichiro Kimura
Original Assignee
Hitachi Plasma Display Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Plasma Display Limited filed Critical Hitachi Plasma Display Limited
Priority to PCT/JP2006/313411 priority Critical patent/WO2008004290A1/fr
Priority to JP2008523569A priority patent/JPWO2008004290A1/ja
Publication of WO2008004290A1 publication Critical patent/WO2008004290A1/fr

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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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G3/28—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 luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—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 luminous gas-discharge panels, e.g. plasma panels using AC panels
    • 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
    • H10K59/13—Active-matrix OLED [AMOLED] displays comprising photosensors that control luminance

Definitions

  • the present invention relates to a flat panel display device having a self-luminous cell.
  • a flat panel display device such as a plasma display panel device (hereinafter also referred to as a PDP device) is formed by bonding two glass substrates to each other, and discharge light is formed in a space formed between the glass substrates.
  • An image is displayed by generating
  • the cell corresponding to the image pixel is a self-luminous type, and is coated with a phosphor that emits visible light of red, green, and blue upon receiving ultraviolet light.
  • the luminous efficiency (brightness) of a self-luminous cell decreases when the device is used for a long time.
  • the chromaticity such as white balance shifts.
  • Patent Document 1 Japanese Patent Laid-Open No. 2000-115801
  • the light emission efficiency (luminance) of a cell may vary depending on the film thickness of the phosphor layer and the like. Since the thickness of the phosphor layer varies depending on the position in the display surface, the variation in the thickness causes uneven brightness and chromaticity. For this reason, adjustments are made in the manufacturing process of the PDP device to eliminate chromaticity unevenness such as luminance unevenness and white balance of each color.
  • cell brightness gradually decreases with the use of PDP devices. The degree of decline depends on the cell location. As a result, uneven brightness and chromaticity appear gradually with the use of PDP devices, even if they do not appear at the time of shipment.
  • a method to adjust the brightness unevenness and chromaticity unevenness after shipping the PDP device has been proposed! ⁇ ⁇ .
  • the adjustment cell for adjusting the brightness is independently formed outside the cell region for displaying the image.
  • Cell to display image Is indirectly measured using the adjustment cell.
  • the luminance reduction rate in the cell displaying the image often does not match the luminance reduction rate in the adjustment cell. . In this case, even if the adjustment cell is used, uneven brightness and chromaticity cannot be adjusted correctly.
  • An object of the present invention is to adjust the luminance unevenness of a cell that appears after a flat panel display device is shipped.
  • the support plate attached to the back surface of the display panel has a plurality of through holes.
  • a light detection unit is attached at a position corresponding to the through hole.
  • the light detection unit directly receives light from the cell facing the through hole and detects the amount of light.
  • the test pattern generation unit outputs a test image signal for displaying the test display pattern on the display panel.
  • the correction control unit generates a correction signal for reducing the unevenness of the light amount depending on the position on the display panel based on the light amount of the cell detected by the light detection unit during the display of the test display pattern.
  • the light amount adjustment unit corrects the luminance information included in the image signal supplied to emit light from the cell according to the correction signal.
  • the signal processing unit generates an image display signal to be supplied to the display panel according to the image signal corrected by the light amount adjusting unit.
  • light from a cell displaying an image can be directly detected by a light detection unit through a plurality of through holes, and the light emission amount of the cell can be adjusted based on the detected light amount.
  • FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.
  • FIG. 2 is an exploded perspective view showing details of a main part of the PDP shown in FIG.
  • FIG. 3 is a plan view showing details of the main parts of the PDP and base chassis shown in FIG. 1.
  • FIG. 4 is a circuit diagram showing details of the photodetecting section in FIG. 1.
  • FIG. 5 is a block diagram showing an outline of the circuit unit shown in FIG. 1.
  • FIG. 6 is a flowchart showing a procedure for obtaining correction values in order to eliminate luminance unevenness and chromaticity unevenness in the manufacturing process of the PDP device.
  • FIG. 7 is a flowchart showing a procedure for eliminating luminance unevenness and chromaticity unevenness after shipment of a PDP.
  • FIG. 8 is an exploded perspective view showing a second embodiment of the present invention.
  • FIG. 9 is an explanatory diagram showing an example of interpolation processing in step S42 of FIG.
  • FIG. 10 is a block diagram showing a third embodiment of the present invention.
  • FIG. 11 is a flowchart showing a procedure for obtaining a correction value in order to eliminate luminance unevenness and chromaticity unevenness in the manufacturing process of the PDP device in the fourth embodiment of the present invention.
  • FIG. 12 is a plan view showing another arrangement example of the through holes and the light detection units.
  • FIG. 13 is a circuit diagram showing another example of the light detection unit.
  • FIG. 1 shows a first embodiment of the present invention.
  • a plasma display panel device (hereinafter also referred to as a PDP device) includes a plasma display panel 10 having a square plate shape (hereinafter also referred to as a PDP), a filter 20 attached to the image display surface 12 side of the PDP 10, and an image display of the PD P10.
  • Front chassis 30 located on the front 12 side, rear chassis 40 located on the rear 14 side of the PDP10, base chassis 50 (support plate) located on the rear 14 side of the PDP10, base chassis 50 and rear chassis
  • the circuit unit 60 is disposed between 40 and for driving the PDP 10. Since the circuit unit 60 is composed of a plurality of parts, it is indicated by a broken-line box in the figure.
  • the PDP device may be configured by attaching protective glass to the opening 32 of the front housing 30.
  • the PDP 10 includes a front plate 16 constituting the image display surface 12 and a back plate 18 facing the front plate 16.
  • a discharge space (cell) is formed between the front plate 16 and the back plate 18.
  • the front plate 16 and the back plate 18 are formed of a glass substrate. For this reason, the light generated by the discharge is transmitted not only through the front plate 16 but also through the back plate 18.
  • the filter 20 has a metal mesh or a transparent electrode on the surface of a polymer film (resin film). It is attached and formed.
  • the filter 20 is transmissive to light.
  • the base chassis 50 has a quadrangular shape corresponding to the PDP 10, and has through holes 52 at positions close to the four corners.
  • the base chassis 50 is integrally formed, for example, by press-curing a plate material having an aluminum alloy force.
  • a light detection unit 70 is attached to the rear housing 40 side of each through hole 52.
  • the light detection unit 70 includes, for example, a photo sensor. The photosensor directly detects the amount (luminance) of light output from the cell of the PDP 10 and transmitted through the back plate 18.
  • the PDP 10 is supported by the base chassis 50 by being fixed to the base chassis 50 using a double-sided adhesive tape (not shown).
  • a double-sided adhesive tape (not shown).
  • the double-sided adhesive tape is attached at a position that closes the through hole 52, the double-sided adhesive tape is punched at a position corresponding to the through hole 52.
  • the through hole 52 has a rectangular cross section.
  • the light detection unit 70 is cylindrical, the through hole 52 has a circular cross section.
  • the through hole 52 is formed in a size so as to be covered by the light detection unit 70. Thereby, only the light passing through the through hole 52 is incident on the light detection unit 70. That is, the light detection unit 70 also functions as a light blocking member that prevents light having external light power from being input to the photosensor.
  • FIG. 2 shows details of a main part of the PDP 10 shown in FIG.
  • the front plate 16 has X electrodes 16b and Y electrodes 16c formed in parallel and alternately on the glass substrate 16a (the lower side in the figure) in order to repeatedly discharge.
  • the electrodes 16b and 16c are covered with a dielectric layer 16d, and the surface of the dielectric layer 16d is covered with a protective layer 16e such as MgO.
  • the back plate 18 has address electrodes 18b formed in parallel to each other on a glass substrate 18a.
  • the address electrode 18b is arranged in a direction perpendicular to the X electrode 16b and the Y electrode 16c.
  • the address electrode 18b is covered with a dielectric layer 18c.
  • partition walls (ribs) 18d are formed at corresponding positions between the address electrodes 18b adjacent to each other.
  • the barrier rib 18d constitutes a side wall of a discharge cell described later. Furthermore, visible light of red (R), green (G), and blue (B) is generated on the side surface of the partition wall 18d and on the dielectric layer 18c between the partition walls 18d adjacent to each other by being excited by ultraviolet rays.
  • PDP10 is A plurality of types of cells that generate light of different colors are alternately arranged.
  • the PDP 10 is configured by adhering a front plate 16 and a rear plate 18 so that a protective layer 16e and a partition wall 18d are in contact with each other and enclosing a discharge gas such as Ne or Xe.
  • Each electrode 16b, 16c, 18b extends to the end of the PDP 10 located outside the sealing region formed on the outer periphery of the PDP 10, and is connected to a drive circuit 64 shown in FIG. 5 described later. .
  • FIG. 3 shows details of the main parts of the PDP 10 and the base chassis 50 shown in FIG.
  • one cell (pixel) of the PDP 10 is formed by a region surrounded by the X electrode 16b, the Y electrode 16c, and the partition wall 18d.
  • Each through hole 52 of the base chassis 50 has a size of, for example, 189 cells of PDP 10 (21 horizontal pixels and 9 vertical pixels).
  • the 189 cells corresponding to the through hole 52 are composed of 63 red cells R that emit red, 63 green cells G that emit green, and 63 blue cells B that emit blue.
  • the light detection unit 70 shown in FIG. 1 can receive light from 63 cells for each color of red, green, and blue. The amount of light received for each color can be increased, and the luminance can be detected accurately. Note that the luminous efficiency of the cells varies depending on the thickness of the phosphor layer and so on, and the brightness of adjacent cells is almost the same. Therefore, even if the luminance is corrected based on the average amount of light from a plurality of cells, the luminance unevenness and the chromaticity unevenness can be corrected correctly. Note that the chromaticity unevenness is caused by the difference between the red cell R, the green cell G, and the blue cell B depending on the relative displacement amount power PDP10.
  • the chromaticity unevenness occurs when the red cell R, the green cell G, and the blue cell B have different brightness unevenness. Due to chromaticity unevenness, white balance is lost in at least a part of the PDP 10. Correction of luminance unevenness and chromaticity unevenness will be described with reference to FIGS.
  • an array of cells for displaying an image is, for example, in the horizontal direction 1920.
  • the X vertical direction is 1080.
  • the 189 cells are cells for displaying images. That is, the light detection unit 70 shown in FIG. 1 can directly receive the light of cell power for displaying an image.
  • FIG. 4 shows details of the light detection unit 70 shown in FIG.
  • the light detection unit 70 includes a photosensor 72 capable of detecting red, green, and blue light, an amplifier OPA, resistors Rl and R2, and a capacitor C1. Resistor R2 and capacitor C1 form a low-pass filter LPF .
  • the photo sensor 72 is configured using, for example, amorphous silicon. The photosensor 72 using amorphous silicon is close to the human visual sensitivity characteristic and has the characteristics! /, So it is ideal for detecting visible light.
  • the photosensor 72 passes a current IL according to the detected light amount.
  • Current IL is amplified by amplifier OPA and converted to voltage Vout.
  • the voltage value Vout is represented by the product of the current IL and the resistance value RL of the resistor R1.
  • the voltage Vout is supplied to the AD converter ADC of the microprocessor MPU through the low pass filter LPF.
  • AD conversion ADC converts analog voltage value Vout to digital value.
  • red, green, and blue light are sequentially received by one photosensor 72, and the received light is sequentially converted into a voltage by one AD converter ADC.
  • the four photosensors 72 arranged so as to oppose the four through holes 52 are calibrated in advance, and the current IL that flows when receiving the same amount of light is the same.
  • the processor MPU is provided in the control unit 62 shown in FIG.
  • FIG. 5 shows an outline of the circuit unit 60 shown in FIG.
  • the circuit unit 60 includes a control unit 62 for controlling the operation of the PDP 10, an X driver XDRV, a Y driver YDRV, an address driver ADRV connected to the PDP 10, and a drive circuit 64 for driving the drivers XDRV and YDRV.
  • the control unit 62 includes a test pattern generation unit 62a, a signal preprocessing unit 62b, a light amount adjustment unit 62c, a signal processing unit 62d, a storage unit 62e, a correction control unit 62f, a timing generation unit 62g, and a request input unit 62h.
  • the test pattern generation unit 62a operates for a predetermined time in response to the adjustment request AREQ received by the request input unit 62h, and sequentially generates a test display pattern for displaying red, green, and blue on the PDP 10 for each predetermined time.
  • the generated test display pattern is output as the test image signal TIMG.
  • the adjustment request AREQ is also supplied with the external force of the PDP device when adjusting the brightness of the PDP 10, as will be described later.
  • the signal preprocessing unit 62b performs gamma correction and the like on the image signal IMG from the outside during normal operation, and performs gamma correction and the like on the test display pattern when adjusting the luminance.
  • the light amount adjustment unit 62c corrects the luminance information included in the image signal IMG from the signal preprocessing unit 62b according to the correction signal CR supplied from the correction control unit 62f in order to adjust the luminance of the PDP 10. To do.
  • the signal processing unit 62d receives the image signal IM corrected by the light amount adjusting unit 62c. In response to G, an image control signal ICNT1 for operating the drive circuit 64 and an image control signal ICNT2 for supply to the address driver ADRV are output.
  • the storage unit 62e stores red, green, and blue luminance values (reference values) measured in the manufacturing process of the PDP device.
  • the storage unit 62e stores a correction value obtained by the correction control unit 62f.
  • the storage unit 62e is a non-volatile memory such as a flash memory, for example. For this reason, the storage unit 62e continues to store the luminance value measured in the manufacturing process of the PDP device even after the PDP device is shipped. Then, as will be described later, after the PDP device is shipped, the brightness of the cell of the PDP 10 is adjusted according to the brightness value stored in the storage unit 62e and the brightness value detected by the light detection unit 70.
  • the correction control unit 62f operates for a predetermined time in response to the adjustment request AREQ, and when the PDP 10 emits light by the test display pattern, the brightness of the PDP 10 detected by the four light detection units 70 ( Calculate the correction value to reduce the brightness unevenness and chromaticity unevenness in the display area of PDP10.
  • the correction control unit 62f outputs the obtained correction value as the correction signal CR to the light amount adjustment unit 62c.
  • the timing generator 62g outputs a timing signal to control the operation timing of the drive circuit 64 and the address driver ADRV.
  • FIG. 6 shows a procedure for obtaining a correction value in order to eliminate luminance unevenness and chromaticity unevenness in the manufacturing process of the PDP device.
  • the process shown in Fig. 6 is automatically performed by setting the operation mode of the PDP device to the test mode for characteristic adjustment.
  • the test mode for example, the normal image display mode force is switched by turning on the test mode switch.
  • the normal image display mode is switched by giving a test command from the test device to the PDP device while the PDP device is connected to the test device.
  • the PDP device After obtaining the correction value, the PDP device automatically switches the operation mode to the normal image display mode.
  • step S10 the test pattern generation unit 62a outputs a test image signal TIMG for emitting only red cells, and the PDP 10 displays red on the entire screen.
  • step S12 the four light detection units 70 detect the luminance of the red light from which the four region forces corresponding to the through holes 52 are also output.
  • the correction control unit 62f holds voltage values VrO corresponding to the luminances of red light in the four areas, respectively.
  • step S14 the test pattern generation unit 62a outputs a test image signal TIMG for emitting only the green cell, and the PDP 10 displays green on the entire screen.
  • step S16 the four light detection units 70 detect the luminance of the green light from which the four region forces corresponding to the through holes 52 are also output.
  • the correction control unit 62f holds the voltage value VgO corresponding to the luminance of green light in the four areas corresponding to the through hole 52, respectively.
  • steps S18 and S20 blue is displayed on the entire screen of the PDP 10 in the same manner as described above, and voltage values VbO corresponding to the luminances of blue light in the four regions are respectively held.
  • the correction control unit 62f determines the voltage corresponding to the luminance (light amount) of the red cells facing the four light detection units 70.
  • the value VrO, the voltage value VgO corresponding to the brightness (light quantity) of the green cell, and the voltage value VbO corresponding to the brightness (light quantity) of the blue cell are stored in the storage unit 62e.
  • the voltage values VrO, VgO, VbO stored in the storage unit 62e are used to eliminate luminance unevenness and chromaticity unevenness in FIG. 7 described later.
  • FIG. 7 shows a procedure for eliminating luminance unevenness and chromaticity unevenness of the PDP 10 after the PDP 10 is shipped.
  • luminance unevenness and chromaticity unevenness do not appear at the time of shipment of the PDP device, they gradually appear as the PDP device is used.
  • the degree of luminance unevenness and chromaticity unevenness varies from one PDP device to another, and it is difficult to predict before shipping the PDP device.
  • the processing shown in FIG. 7 is performed when the request input unit 62h shown in FIG. 5 receives the adjustment request AREQ.
  • the request input unit 62h outputs an adjustment request AREQ when the image quality correction menu of the PDP device is selected by the user.
  • step S30 the test pattern generation unit 62a outputs a test image signal TIMG for emitting only red cells, and the PDP 10 displays red on the entire screen.
  • step S32 the four light detection units 70 detect the luminance of the red light from which the four region forces corresponding to the through holes 52 are also output.
  • the correction control unit 62f holds voltage values Vr corresponding to the luminances of red light in the four areas, respectively.
  • steps S34 to S36 as in steps S30 to S32, green is displayed on the entire screen of the PDP 10, and the voltage value Vg corresponding to the luminance of the green light in the four areas is held.
  • steps S38 to S40 as in steps S30 to S32, blue is displayed on the entire screen of the PDP 10, and the voltage value Vb corresponding to the luminance of the blue light in the four areas is held.
  • step S42 a calculation for correcting chromaticity unevenness is performed.
  • the correction control unit 62f displays the voltage ratio Vr: Vg: Vb corresponding to the detected brightness of the red cell, green cell, and blue cell, and the voltage ratio VrO: VgO: VbO held in the storage unit 62e. Perform an operation to make it equal to.
  • the correction control unit 62f also sets the voltage ratio Vr ZVrO corresponding to the luminance ratio of the red cell, the voltage ratio VgZVgO corresponding to the luminance ratio of the green cell, and the voltage ratio VbZVbO corresponding to the luminance ratio of the blue cell to each other. To perform the operation.
  • step S42 By performing the calculation using the relative value based on the value in the manufacturing process, the influence of the variation in the characteristics of the photosensor 72 can be eliminated.
  • the calculation in step S42 generates a correction signal CR for equalizing the white balance of the entire screen of the PDP 10 and equalizing the luminance of the entire screen.
  • four light detections are performed using voltage values VrO, VgO, VbO corresponding to the luminances of the four regions facing the four light detection units 70 stored in the storage unit 62e.
  • Interpolation processing for obtaining a correction value corresponding to a region not facing the unit 70 is performed.
  • a correction signal CR for adjusting luminance unevenness and chromaticity unevenness caused by using the PDP device is generated.
  • the PDP 10 is divided into a plurality of correction areas in order to correct luminance unevenness and chromaticity unevenness. For example, the number of correction areas is 54 (9 horizontal x 6 vertical).
  • the correction signal CR is generated corresponding to each correction area.
  • step S42 the correction value is the lowest in the four regions, and is determined according to the region.
  • the voltage ratio Vr: Vg: Vb is equal to the voltage ratio VrO: VgO: VbO
  • red light Calculation is performed in accordance with the color with the lowest luminance among green light and blue light, and a correction signal CR is generated.
  • the correction signal CR may be generated according to the higher luminance side, which may be generated according to the average luminance value.
  • the correction control unit 62f stores the correction value indicated by the obtained correction signal CR in a volatile latch or the like and writes it in the storage unit 62e.
  • the light amount adjustment unit 62c adjusts the chromaticity and luminance of the image signal IMG for each correction region in accordance with the correction signal CR, and outputs the adjusted image signal IMG to the signal processing unit 62d.
  • the correction control unit 62f changes the value of the correction signal CR for each detection operation of the light detection unit 70 in response to the adjustment request AREQ. Even when unevenness occurs and the image quality deteriorates, the image quality at the time of shipment of the PDP device can be restored.
  • the process shown in FIG. 7 is performed, for example, a plurality of times in succession, and an average value is adopted. Thereby, it is possible to improve the accuracy of correcting luminance unevenness or chromaticity unevenness.
  • the correction is repeated gradually while setting the optimal brightness and white balance while gradually reducing the correction.
  • the value of the correction signal CR can be searched.
  • light having a cell force at a plurality of locations of the PDP 10 can be directly detected by the plurality of light detection units 70 through the through holes 52, and a plurality of PDPs 10 can be detected based on the detected light amount.
  • FIG. 8 shows a second embodiment of the present invention.
  • the same elements as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • through holes 52 are formed at 15 locations at intervals in the base chassis 50A, and a light detection unit 70 is attached corresponding to each through hole 52.
  • the through holes 52 are formed at five places along the horizontal direction of the PDP 10 and at three places along the vertical direction.
  • the shape of the base chassis 50A is the same as that of the base chassis 50 of the first embodiment except that the number of through holes 52 is different.
  • the surface of the base chassis 50A on the rear casing 40 side covers the through hole 52 and the light detection unit 70.
  • a light shielding member 76 is attached.
  • the light shielding member 76 is formed, for example, by bending an aluminum plate or the like into a box shape, and the inner surface is painted black. As a result, it is possible to reliably prevent the external light incident from the rear housing 40 side from being detected by the light detection unit 70, and to improve the light detection accuracy. This is particularly effective when the cross-sectional shape of the light detection unit 70 is different from the shape of the through hole 52 and the light detection unit 70 cannot cover the through hole 52.
  • the correction control unit 62f shown in FIG. 5 performs the calculation using the luminances (red, green, and blue luminances) of the PDP 10 detected by the fifteen light detection units 70. Is the same as in the first embodiment. In this embodiment, the amount of information stored in the storage unit 62e is increased compared to the first embodiment. On the other hand, since the interpolation process can be performed based on a large number of detection results, the accuracy of luminance correction is improved.
  • the processing for eliminating the brightness unevenness and chromaticity unevenness of PDP10 is the same as in Fig. 6 and Fig. 7.
  • FIG. 9 shows an example of the interpolation processing in step S42 of FIG.
  • the interpolation processing is performed from an interpolation processing unit (not shown) formed in the correction control unit 62f shown in FIG. 5 except for the multiplication processing of the correction coefficient CC and the image signal IMG.
  • a horizontal interpolation coefficient HIC for adjusting the luminance in the horizontal direction (X electrode direction) of the PDP 10 and a vertical interpolation coefficient VIC for adjusting the luminance in the vertical direction (address electrode direction) of the PDP 10 are obtained. These are stored in advance in the storage unit 62e shown in FIG.
  • the values of the horizontal interpolation coefficient HIC and the vertical interpolation coefficient V IC vary depending on the position of the cell where the luminance interpolation processing is performed.
  • the amount of light (voltage values VrO, VgO, VbO stored in the storage unit 62e) detected by the rows (upper, middle, and lower) of the five photodetecting units 70 arranged in the horizontal direction are multiplied by the multiplier MUL.
  • the result is multiplied by the horizontal interpolation coefficient HIC, and the multiplication result is added by the adder ADD.
  • each addition result is multiplied by the vertical interpolation coefficient VIC, and the multiplication results are added to each other.
  • a correction coefficient CC correction signal CR
  • the pixel data PIX which is the image signal IMG for one pixel, is multiplied by the correction coefficient CC to correct the luminance of the image signal IMG.
  • the processing shown in Fig. 9 is performed on a cell-by-cell basis for each red cell, green cell, and blue cell. Alternatively, it may be carried out in units of cell groups constituted by a predetermined number of cells for each red cell, green cell and blue cell. Note that the interpolation processing of the first embodiment is performed in the same way as the interpolation processing shown in FIG. Applied.
  • the same effect as that of the first embodiment described above can be obtained. Furthermore, by attaching the light shielding member 76 to the base chassis 50, it is possible to reliably prevent external light from entering the light detection unit 70. As a result, the detection accuracy of the light detection unit 70 can be improved. In addition, the accuracy of luminance correction can be improved by detecting light by a large number of light detection units 70. As a result, luminance unevenness and chromaticity unevenness can be more reliably eliminated.
  • FIG. 10 shows a third embodiment of the present invention.
  • the same elements as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
  • a time accumulation unit 62i is formed instead of the request input unit 62h.
  • Other configurations are the same as those of the first embodiment (FIG. 5).
  • the time accumulating unit 62i has a counter for accumulating the operation time of the PDP 10, and each time the operation time reaches a predetermined time (for example, 500 hours), an adjustment request AREQ is sent to the test pattern generating unit 62a and the light detecting unit. 70 and the correction control unit 62f.
  • the test pattern generation unit 62a, the light detection unit 70, and the correction control unit 62f execute the operation shown in FIG. 7 in response to only the first power-off operation of the PDP device after receiving the adjustment request AREQ.
  • the value (correction value) of the correction signal CR obtained in step S42 in FIG. 7 is stored in the storage unit 62e. Then, after the operation shown in FIG. 7 is completed, the power of the PDP device is turned off.
  • the correction control unit 62f When the power of the PDP device is turned on again, the correction control unit 62f outputs the correction value read from the storage unit 62e to the light amount adjustment unit 62c as a correction signal CR.
  • the same effect as in the first embodiment described above can be obtained. Furthermore, by performing the correction process shown in FIG. 7 every time a predetermined operation time elapses, it is possible to eliminate luminance unevenness and chromaticity unevenness in accordance with the usage state of each PDP 10.
  • FIG. 11 shows a procedure for obtaining correction values in order to eliminate luminance unevenness and chromaticity unevenness in the manufacturing process of the PDP device in the fourth embodiment of the present invention.
  • the same elements as those described in the first embodiment are denoted by the same reference numerals, and for these, Detailed description is omitted.
  • the plasma display panel device of this embodiment is different from the processing flow force of FIG. 11 in the first embodiment (FIG. 6). Other configurations are the same as those in the first embodiment.
  • steps S10 to S20 is the same as that in the first embodiment (Fig. 6). However, the detected brightness of each color is temporarily held as voltage values Vr, Vg, and Vb.
  • the initial voltage values VrO, VgO, and VbO are determined in advance during the development of the PDP10, which is not required in the manufacturing process.
  • Step S24 is the same as step S42 shown in FIG.
  • the voltage values VrO, VgO, VbO used for the calculation are predetermined values. Then, an operation for making the voltage ratio Vr: Vg; Vb equal to the voltage ratio VrO: VgO: VbO is performed. In addition, an operation for making the voltage ratio VrZVrO, the voltage ratio VgZVgO, and the voltage ratio VbZVbO equal to each other is performed.
  • the correction signal CR generated by the calculation is output to the light amount adjustment unit 62c shown in FIG. 5, and the luminance unevenness and the chromaticity unevenness are adjusted.
  • step S26 voltage values corresponding to the correction signal CR (correction value) generated by the calculation are stored in the storage unit 62e as initial voltage values VrO, VgO, and VbO.
  • luminance unevenness and chromaticity unevenness are adjusted in the manufacturing process, and voltage values corresponding to the adjusted luminance are stored in the storage unit 62e as initial voltage values VrO, VgO, and VbO.
  • the same effect as in the first embodiment described above can be obtained. Furthermore, by directly detecting and correcting the brightness of the cell displaying the image in the manufacturing process, it is possible to eliminate the brightness unevenness and chromaticity unevenness of the PDP device that has been treated as a defective product. As a result, the manufacturing yield can be improved and the manufacturing cost can be reduced.
  • the present invention is applied to a plasma display panel device has been described. The invention is not limited to the powerful embodiments.
  • the present invention may be applied to an organic EL display (organic electroluminescence display), an inorganic EL ice display (inorganic electroluminescence display), and a surface-conduction electron-emitter display. Protecting the 53 ⁇ 4J fruit Can do. Furthermore, it can be applied to other flat panel display devices using a glass substrate.
  • the processing shown in FIG. 7 is performed every time a predetermined operation time elapses.
  • the invention is not limited to the powerful embodiments.
  • each time the PDP device is turned off the process shown in FIG. 7 may be performed to turn off the power.
  • the process shown in FIG. 7 may be performed every time the PDP device is turned on.
  • the processing shown in Fig. 7 may be performed in response to only the first power-on operation of the PDP device! / ⁇ .
  • a power accumulation unit that accumulates the power consumption of the PDP 10 is formed, and an adjustment request AREQ is output every time predetermined power is consumed. Further, chromaticity unevenness may be corrected.
  • FIG. 13 In the first embodiment described above, an example has been described in which a single photosensor 72 is used to sequentially detect red, green, and blue light amounts, as shown in FIGS.
  • the present invention is not limited to such an embodiment.
  • three photosensors 72 and three optical filters FLT (FLTR, FLTG, FLTB) may be formed in the light detection unit 70 to detect red, green, and blue light quantities simultaneously.
  • the test pattern generation unit 62a simultaneously emits red cells, green cells, and blue cells as test display patterns. That is, by displaying white, steps S10, S14, and S18 shown in FIG. 6 are performed at a time, and steps S12, S16, and S20 are performed at a time. Similarly, steps S30, S34, and S38 shown in FIG. 7 are performed at a time, and steps S32, S36, and S40 are performed at a time.
  • the light detection unit 70 includes three photosensors 72 that detect red, green, and blue light, amplifiers OPA corresponding to the photosensors 72, resistors Rl and R2, and a capacitor C1. is doing.
  • the MPU has three AD converter ADCs corresponding to the photosensor 72. Yes.
  • Optical filters FLT (FLTR, FLTG, FLTB) are arranged on the light receiving surface of each photosensor 72.
  • the optical filter FLTR transmits only red light
  • the optical filter FLT G transmits only green light
  • the optical filter FLTB transmits only blue light.
  • each photosensor 72 individually detects only one of the red, green, and blue light output from the PDP 10 cell.
  • three AD converter ADCs detect red, green and blue light respectively.
  • a switch that selectively supplies one of the three outputs of the photodetection unit 70 to the MPU is formed, and one AD converter ADC is used to switch red, green, and blue light sequentially while switching the switch. It may be detected.
  • a reference value (zero value, black pattern) may be detected before the processing of FIGS. 6, 7, and 11.
  • the reference value is obtained by measuring the luminance of each color in a state where the control unit 62 does not generate an image signal (no display state or black display state).
  • the present invention can be applied to a flat panel display device such as a plasma display panel device.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Control Of Gas Discharge Display Tubes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

Une plaque support (50) munie de trous de passage (52) est fixée à l'arrière d'un écran d'affichage (10), et des photodétecteurs (70) sont installés dans des positions correspondant aux trous de passage respectifs (52). Chaque photodétecteur (70) reçoit directement la lumière d'une cellule opposée au trou de passage correspondant (52) et détecte l'intensité de la lumière. Une section de commande de correction génère un signal de correction selon l'intensité de lumière détectée provenant de chaque cellule pendant l'affichage d'un modèle d'affichage d'essai. Selon le signal de correction, la section de réglage d'intensité lumineuse corrige les informations de luminance incluses dans un signal d'image fourni pour permettre à chaque cellule d'émettre de la lumière. Une section de traitement de signal génère un signal d'affichage d'image devant être fourni à l'écran d'affichage selon le signal d'image corrigé. Ainsi, l'intensité de lumière émise provenant de chaque cellule devant être ajustée selon l'intensité lumineuse est directement détectée par le photodétecteur correspondant (70) à travers le trou de passage (52). En conséquence, la variation de luminance provoquée après l'expédition de l'écran plat peut être supprimée.
PCT/JP2006/313411 2006-07-05 2006-07-05 Écran plat WO2008004290A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010091703A (ja) * 2008-10-07 2010-04-22 Sony Corp 表示装置
WO2010046643A2 (fr) * 2008-10-23 2010-04-29 Cambridge Display Technology Limited Ensemble de capteurs optiques
JP2012008169A (ja) * 2010-06-22 2012-01-12 Sony Corp 画像表示装置、電子機器、測定治具、画像表示システム、画像表示方法、表示補正装置、表示補正方法、プログラム

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05119739A (ja) * 1991-10-25 1993-05-18 Fujitsu Ltd 表示装置
JPH10222084A (ja) * 1997-02-03 1998-08-21 Nanao Corp 液晶表示装置の光検出器
JP2002169511A (ja) * 2000-09-19 2002-06-14 Semiconductor Energy Lab Co Ltd 自発光装置およびその駆動方法
JP2006003904A (ja) * 2004-06-18 2006-01-05 Agilent Technol Inc 自発光ディスプレイ内スペクトル成分制御

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05119739A (ja) * 1991-10-25 1993-05-18 Fujitsu Ltd 表示装置
JPH10222084A (ja) * 1997-02-03 1998-08-21 Nanao Corp 液晶表示装置の光検出器
JP2002169511A (ja) * 2000-09-19 2002-06-14 Semiconductor Energy Lab Co Ltd 自発光装置およびその駆動方法
JP2006003904A (ja) * 2004-06-18 2006-01-05 Agilent Technol Inc 自発光ディスプレイ内スペクトル成分制御

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010091703A (ja) * 2008-10-07 2010-04-22 Sony Corp 表示装置
CN101714327B (zh) * 2008-10-07 2012-07-18 索尼株式会社 显示装置
WO2010046643A2 (fr) * 2008-10-23 2010-04-29 Cambridge Display Technology Limited Ensemble de capteurs optiques
WO2010046643A3 (fr) * 2008-10-23 2011-06-30 Cambridge Display Technology Limited Ensemble de capteurs optiques
JP2012506567A (ja) * 2008-10-23 2012-03-15 ケンブリッジ ディスプレイ テクノロジー リミテッド 光センサアレイ
JP2012008169A (ja) * 2010-06-22 2012-01-12 Sony Corp 画像表示装置、電子機器、測定治具、画像表示システム、画像表示方法、表示補正装置、表示補正方法、プログラム

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