JP2007121730A - Image display device, and image adjustment system and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display device etc., capable of evading deterioration in picture quality with time. <P>SOLUTION: A TV receiver 100 includes a display driving circuit 111, a flat type rectangular display panel 112 composed of an LCD, a PDP, a FED, etc., an X driver 113 and a Y driver 114, etc., and further includes an imaging element 121 for imaging the display panel 112, a picture measurement unit 119, etc. The imaging element 121 images a display surface of the display panel 112 and a detection section of the picture measurement unit 119 detects luminance unevenness, gamma characteristics, color balance, etc., of the display surface. Based upon the detected luminance unevenness, gamma characteristics, color balance, etc., a control unit 115 controls the X driver 113 and Y driver 114. Consequently, the display panel 112 is placed in display operation permanently with proper display characteristics similar to those at the time of factory shipment without reference to a lapse after shipment from the factory. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image display apparatus, an image adjustment system, and an image adjustment method having a display for displaying an image such as an FED (Field Emission Display) and an SED (Surface-conduction Electron-emitter). Is.

2. Description of the Related Art Conventionally, in an image display apparatus having an FED, an SED, or the like, for example, a television receiver, various apparatuses are used when inspection and image quality adjustment are performed before factory shipment. For example, in an automatic characteristic inspection / characteristic adjustment apparatus for a color television receiver, an image difference signal between a basic color television receiver and a color television receiver to be inspected, a test pattern image to be displayed, and a normal image are displayed. The signal difference between the ratio of R, G, B and the ratio of regular R, G, B in each color of the difference signal and color bar is detected, and image quality such as hue, contrast, etc. is reduced so that these detected differences are reduced. Is adjusted electrically without visual observation (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 06-225345

  Thus, an apparatus having a display is shipped in a state in which an image can be displayed with an appropriate image quality by adjusting the image quality of the display before shipment from the factory. However, displays such as FEDs and SEDs perform display processing digitally for each display element divided for each pixel, and therefore, there are variations in light emission characteristics and luminance for each light emitting element and drive train. For this reason, the variation in the light emission characteristics and the brightness becomes remarkable due to the secular change accompanying the use by the user, and the deterioration of the brightness and the brightness unevenness inevitably occur. Of course, not only the luminance unevenness but also various elements related to the display characteristics of the display surface such as the gradation characteristics will change with the passage of time from the factory shipment.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide an image display device, an image adjustment system, and an image adjustment method that can avoid deterioration of image quality due to secular change.

  In order to solve the above problem, in the image display device according to claim 1, a display unit that operates to display an image on a display surface, and an imaging that images the display surface in a state in which the display unit is operating. Means for detecting a state of an element related to the display characteristics of the display surface based on an image captured by the imaging means, and a state of the element related to the display characteristics detected by the detection means. And control means for controlling display characteristics of the display means.

  In the image display device, the display characteristics of the display surface are appropriately adjusted at the time of factory shipment or the like, but the display characteristics change with aging. Therefore, by capturing an image of the display surface whose display characteristics have been changed by the imaging means, and detecting the state of the elements related to the display characteristics of the display surface based on the captured image, the change in the display characteristics over time after shipment from the factory can be detected. It can be detected objectively. Therefore, by controlling the display characteristics of the display means based on this objectively detected change in display characteristics over time after factory shipment, the factory shipment can be made permanently without being affected by the age after factory shipment. The display means can be operated with appropriate display characteristics as in the case of time.

  In the image display device according to claim 2, the display unit displays an image for screen adjustment on the display surface when the imaging unit captures an image. Accordingly, the display surface on which the image for screen adjustment is displayed is picked up, and based on this, the state of the element related to the display characteristic of the display surface is detected, thereby changing the state of the element related to the display characteristic. It can be detected with high accuracy.

  In the image display device according to claim 3, the imaging unit is disposed on the outer periphery of the display surface and images the display surface from an oblique direction. Correction means for correcting the captured image into an image captured from substantially the front direction, and the detection means is based on the image corrected by the correction means, the state of the elements related to the display characteristics of the display surface Is detected. Therefore, the image sensor can be arranged on the outer frame of the image display device surrounding the display surface, and the appearance of the product is not impaired, and the present invention can be implemented with a simple design change even in an existing TV receiver. can do.

  In the image display device according to claim 4, the imaging unit includes an imaging element and a light guide unit that optically guides the image on the display surface to the imaging element. Therefore, even if an image sensor is arranged on the outer frame or the like of the image display device that surrounds the display surface, the display surface image can be captured without hindrance.

  In the image display device according to claim 5, the imaging unit includes a correction unit that corrects an image from an oblique direction of the display surface to an image from a substantially front direction. Therefore, even if the image sensor is arranged on the outer frame or the like of the image display device that surrounds the display surface, an image from the substantially front direction of the display surface can be captured without any trouble.

  In the image display device according to claim 6, the control unit controls at least one of luminance, gradation characteristics, color temperature, or color balance of the display surface. Therefore, the brightness, gradation characteristics, color temperature, color balance, etc. of the display surface can be maintained appropriately and permanently without being influenced by the aging after the factory shipment.

  The image adjustment system according to claim 7 is an image adjustment system including an image display device and a transmission device, and the image display device operates to display an image on a display surface. Means, receiving means for receiving an image transmitted from the transmitting device, detection means for detecting a state of an element related to display characteristics of the display surface based on the image received by the receiving means, and Control means for controlling the display characteristics of the display means based on the state of the elements related to the display characteristics detected by the detection means, and the transmission device displays the display in a state in which the display means is operating. Imaging means for imaging a surface, and transmission means for transmitting an image of the display surface imaged by the imaging means to the image display device.

  In the image display device in the image adjustment system, the display characteristics of the display surface are appropriately adjusted at the time of factory shipment or the like, but the display characteristics change with aging. Therefore, by capturing and transmitting the display surface whose display characteristics have changed on the transmission device side, and detecting the state of the elements related to the display characteristics of the display surface based on the image captured on the image display device side that has received this It is possible to objectively detect changes in display characteristics over time after factory shipment. Therefore, by controlling the display characteristics of the display means on the basis of the detected change in display characteristics over time after shipment from the factory, it is permanent regardless of the aging of the image display apparatus after shipment from the factory. In addition, the display means can be operated with appropriate display characteristics as in the factory shipment.

  The image adjustment system according to claim 8 is an image adjustment system including an image display device and a transmission device, and the image display device operates to display an image on a display surface. And means for receiving data indicating the state of the element related to the display characteristic of the display surface transmitted from the transmitter, and the state of the element related to the display characteristic of the display surface received by the receiving means. Control means for controlling the display characteristics of the display means based on the data to be displayed, and the transmitting device is an element related to the display characteristics of the display surface from the display surface when the display means is operating. Detecting means for detecting the state of the display, and transmitting means for transmitting data indicating the state of the element related to the display characteristics detected by the detecting means to the image display device.

  In the image display device in the image adjustment system, the display characteristics of the display surface are appropriately adjusted at the time of factory shipment or the like, but the display characteristics change with aging. Therefore, by detecting the state of the elements related to the display characteristics of the display surface whose display characteristics have changed on the transmission device side, it is possible to objectively detect changes in the display characteristics over time after factory shipment. Therefore, the objectively detected change in display characteristics over time after factory shipment is received on the image display device side, and based on this, the display characteristics of the display means are controlled, so that the image display device after factory shipment. It is possible to operate the display means with appropriate display characteristics in a permanent manner without being influenced by the aging.

  In the image adjustment system according to claim 9, the display unit of the image display device is configured to adjust the screen on the display surface when the image pickup unit or the detection unit of the transmission device operates. Display an image. Accordingly, the display surface on which the image for screen adjustment is displayed is picked up, and based on this, the state of the element related to the display characteristic of the display surface is detected, thereby changing the state of the element related to the display characteristic. It can be detected with high accuracy.

  In the image adjustment system according to claim 10, the control unit controls at least one of the luminance of the display surface, the color temperature of the image displayed on the display surface, or the color balance. Therefore, the brightness, gradation characteristics, color temperature, color balance, etc. of the display surface can be maintained appropriately as in the factory shipment without being affected by the aging of the image display device after shipment from the factory.

  In the image adjustment system according to claim 11, the transmission device is a remote control unit that transmits a signal modulated to a predetermined frequency in response to a key operation and remotely operates the image display device. The means modulates the image of the display surface or the data indicating the state of the element related to the display characteristics into a signal of the predetermined frequency and transmits the data. Therefore, by effectively using a remote control unit for remotely operating the image display device, the image display device remotely operated by the remote control unit is permanently affected by the time after shipment from the factory, Similarly, the display means of the image display device can be operated with appropriate display characteristics.

  The image adjustment method according to claim 12 is an image adjustment method in an image display device having a display unit that operates and displays an image on a display surface, in a state where the display unit is operating. The display surface is imaged, the state of an element related to the display characteristic of the display surface is detected based on the captured image, and the display of the display unit is displayed based on the detected state of the element related to the display characteristic Control properties. Therefore, by performing each operation according to the described procedure, the same effects as those of the inventions according to claims 1 and 7 are obtained.

  The image adjustment method according to claim 13 is an image adjustment method in an image display device having display means for operating and displaying an image on a display surface, wherein the display means is operating. From the display surface, the state of an element related to the display characteristic of the display surface is detected outside the image display device, and data indicating the state of the element related to the detected display characteristic is transmitted to the image display device. And receiving the transmitted data indicating the state of the element related to the display characteristic on the image display device side, and based on the received data indicating the state of the element related to the display characteristic of the display surface, the display Control the display characteristics of the means. Therefore, by performing each operation according to the described procedure, the same effect as that of the invention according to claim 8 is obtained.

  According to the image display device, the image adjustment system, and the image adjustment method according to the present invention, it is possible to objectively detect a change in display characteristics over time after factory shipment. Therefore, by controlling the display characteristics of the display means based on this objectively detected change in display characteristics over time after factory shipment, the factory shipment can be made permanently without being affected by the age after factory shipment. The display means can be operated with appropriate display characteristics as in the case of time.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a block diagram showing a first embodiment of the present invention. The TV receiver 100 includes a tuner 102 connected to an antenna 101, and the tuner 102 is controlled in reception frequency by a channel selection control unit 103. The TV signal of the specific station received by the tuner 102 whose reception frequency is controlled is separated into an audio signal and a video signal by the VIF / SIF selector 104. The separated audio signal is demodulated by the audio multiplex demodulation / PNL 105 and supplied to the speaker 107 via the audio output circuit 106, so that the audio signal is output from the speaker 107.

  The video signal separated by the VIF / SIF selector 104 is input to the video signal processing unit 108, and this video signal is input to the display drive circuit 111 via the video / color signal processing circuit 109 and the chroma signal output circuit 110. Is output. The display drive circuit 111 is a circuit for driving a flat and rectangular display panel 112 made of an LCD, PDP, FED, etc., and has an X driver 113 and a Y driver 114, and is supplied from the chroma signal output circuit 110. The output is given to the X driver 113.

  The video signal separated by the VIF / SIF selector 104 is further output to the control circuit 115. The control circuit 115 includes a CPU, a ROM that stores a program for operating the CPU, a work RAM, and its peripheral circuits. The display panel 112 has a correction data memory 116 for each display area, and controls the chroma signal output circuit 110, the X driver 113, the Y driver 114, the image sensor 121, and the like.

  An operation input unit 117, a remote control decoder 118, and a screen measurement unit 119 are connected to the control circuit 115. The operation input unit 117 is provided with various operation buttons such as a power button and a channel selection button. Infrared light receiving sensor 120 is connected to remote control decoder 118, and infrared light receiving sensor 120 receives an infrared signal transmitted from remote control transmitter 140.

  The screen measurement unit 119 performs various processes on the A / D converter 122 that converts an analog imaging signal from the imaging device 121 that images the display panel 112 into a digital signal, and the digital image signal from the A / D converter 122. An image signal processing unit 123, an image memory 125 connected to the image signal processing unit 123 via a switch 124, and coordinate conversion / distortion correction for coordinate conversion and distortion correction of an image temporarily stored in the image memory 125. And a detection unit 127 that detects a state of an element related to display characteristics such as luminance unevenness, gamma characteristics, and color balance of the image subjected to the coordinate conversion and distortion correction. The state of elements related to image quality, such as luminance unevenness, gamma characteristics, and color balance, detected by the detection unit 127, is input to the control circuit 115. Further, an optical system 131 capable of forming an image of the entire area of the display panel 112 on the imaging surface of the imaging element 121 is provided in front of the imaging element 121.

  The TV receiver 100 is provided with a video / audio input terminal 128, and an external video source such as a digital camera 150 is connected to the video / audio input terminal 128 through a video output terminal 151. The video / audio input terminal 128 is connected to the VIF / SIF selector 101 and the switch 124 via the video / audio input circuit 129. The switch 124 selectively connects the image memory 125 to the video / audio input circuit 129 and the imaging signal processing unit 123, so that the image on the imaging element 121 side and the digital camera 150 image are displayed on the detection unit 127. It is possible to input selectively.

  The digital camera 150 has a general configuration and includes an imaging lens unit 152, an electronic viewfinder / monitor display unit 153, and the like. A DC / DC converter 130 is connected to the Y driver 114 of the display drive circuit 111.

  FIG. 2 is a diagram illustrating an arrangement configuration of the imaging element 121 and the optical system 131 in the present embodiment. As shown in the figure, the image pickup device 121 composed of a CCD or CMOS sensor and the optical system 131 composed of a correction lens, an imaging lens, and the like are arranged at the lower center of the outer frame portion 132 surrounding the display panel 112. Has been placed. The image sensor 121 has a field of view A that can image the entire surface of the display panel 112 by the optical system 131 disposed in front of the image sensor 121.

  The operation of the present embodiment having the above configuration will be described based on the flowchart shown in FIG. 3 and the operation transition diagram shown in FIG. That is, in the control circuit 115, the power of the TV receiver 100 is turned on, the display panel 112 is performing display operation, and the switch 124 is switched to the imaging signal processing unit 123 side as shown in FIG. In this state, processing is executed based on the program as shown in the flowchart of FIG. At this time, an image of an arbitrary broadcast program or the like may be displayed on the display panel 112, or the display panel 112 may be operated to display without displaying an image, or any one described later. Such a test pattern may be displayed on the display panel 112.

  First, it is determined whether or not it is time to perform screen characteristic adjustment processing based on an instruction by a user operation on the operation input unit 117 or a periodic adjustment process cycle of screen characteristics programmed in advance ( In step S101), when it is not time to perform the adjustment process of the screen characteristics, the process proceeds to another adjustment process (step S102).

  When it is time to perform the adjustment process of the screen characteristics, the entire screen of the display panel 112 (FIG. 4A) that is performing the display operation is imaged by the image sensor 121 (step S103, FIG. 4B). )). Therefore, by the processing in step S103, a captured image P1 composed of the entire display panel 112 is obtained as shown in FIG. However, since the captured image P1 is captured by the image sensor 121 disposed at the lower center of the outer frame portion 132 surrounding the display panel 112, the display panel 112 is captured from an oblique direction. In addition, as shown in FIG. 4C, the rectangular display panel 112 is photographed in a trapezoidal shape. Therefore, by converting the image data of the captured image captured by the rectangular display panel 112 into a trapezoid, the image data that is the original rectangle when the display panel 112 is viewed from substantially the front is generated. (Step S104, FIG. 4D). By the processing in step S104, an image P2 in which the display panel 112 is an original rectangle is obtained as shown in FIG.

  Next, it is determined whether or not it is time to perform luminance unevenness adjustment processing based on an instruction by a user operation on the operation input unit 117 or a periodic luminance unevenness adjustment period programmed in advance ( If it is not time to perform the luminance unevenness adjustment process, the process proceeds to other screen adjustment processes such as gradation characteristics, color temperature, and color balance (step S106).

  If it is time to perform the luminance unevenness adjustment processing, the luminance of each pixel in each area is detected from the image data of the image corrected in step S104 (step S107, FIG. 4F). . Here, as shown in FIG. 4E, each region is a region in which the display panel 112 virtually divides the original rectangular image P2 into a plurality of equal areas. It is each area | region divided | segmented into.

  Subsequently, the luminance value for each block and matrix is calculated from the luminance value for each pixel detected in step S107, and the luminance values for the screen average, matrix average, and block average are calculated (step S108). Here, the block is a unit whose luminance can be controlled, which is composed of a pixel group existing in a range smaller than the area. Further, the luminance value for each matrix is the luminance value of each row composed of a group of pixels arranged in the X direction on the display panel 112 and the luminance of each column composed of a group of pixels arranged in the Y direction. Value. The screen average luminance value is an average value of the luminance values of the pixels of the entire screen. The matrix average luminance value is the average value of the luminance values of the pixels belonging to each row and column, and the block average luminance value is the average value of the luminance values of the pixels belonging to the block.

If the luminance value or the average luminance value is calculated in this way,
(1) Luminance difference of each matrix = Luminance value of each matrix−Brightness value of screen average (2) Luminance difference of each block = Brightness value of each block−Average luminance value of the matrix (3) Brightness difference of each pixel = The luminance value of each pixel−the average luminance value of the block is calculated (step S109).
Here, in Equation (2), the “average luminance value of the matrix” is the average luminance value of the row and column intersecting the block, and in Equation (3), “the average luminance value of the block” Is a block average luminance value of the block to which the pixel belongs.

  Next, it is determined whether or not the first row and column in the display panel 112 is a matrix having higher brightness than the other (step S110). This determination is made based on whether or not the luminance difference of the matrix calculated by the equation (1) is greater than or equal to a predetermined value. If the result of this determination is that the brightness difference between the row and column is not greater than or equal to a predetermined value, the process proceeds to step S112 without performing the process of step S111. However, if the luminance difference of the row or column is greater than or equal to a predetermined value and the luminance is higher than others (see FIG. 4G), the luminance correction of the matrix is performed so as to reduce the driving voltage of the matrix. Data is set and stored in the correction data memory 116 (step S111). At this time, if the luminance difference of only the row or only the column is equal to or greater than a predetermined value and the luminance is higher than the others, the luminance correction of the matrix is performed so as to reduce the driving voltage only for the row or only the column. Data is set and stored in the correction data memory 116.

Subsequently, it is determined whether or not the matrix is lower in brightness than the other (step S112). This determination is made based on whether or not the luminance difference of the matrix calculated by the equation (1) is less than a predetermined value. As a result of the determination, if the luminance difference between the row and the column is not less than the predetermined value, the process proceeds to step S113 without performing the process of step S113. However, if the luminance difference between the row and the column is less than a predetermined value and the luminance is lower than others (see FIG. 3G), the luminance correction of the matrix is performed so as to increase the driving voltage of the matrix. Data is set and stored in the correction data memory 116 (step S113). At this time, as described above, when the luminance difference of only the row or column is equal to or greater than a predetermined value and the luminance is lower than the others, the matrix is set so that the driving voltage of only the row or column is lowered. Brightness correction data is set and stored in the correction data memory 116.
The predetermined value used in step S110 is preferably a positive value and the predetermined value used in step S112 is preferably a negative value, but both may be the same value.

  Next, it is determined whether or not the matrix that has undergone the processes in steps S110 to S113 is the last matrix in the display panel 112 (step S114). If it is not the last row, the next matrix is selected (step S115), and the processing from step S110 is repeated. If the processes of steps S110 to S113 have been performed up to the last matrix (step S114; YES), the control circuit 115 controls the X driver 113 and the Y driver, and the drive data of each matrix is converted into the correction data memory 116. The drive signal of the matrix stored in (5) is corrected and output based on the luminance correction data of the matrix (step S116, FIG. 4 (H)). As a result, as shown in FIG. 4I, luminance unevenness in units of rows and columns is corrected.

  Further, processing similar to the matrix described above is executed for the blocks and pixels of the display panel 112. That is, it is determined whether or not the first block or pixel in the display panel 112 is a block or pixel having higher brightness than the other (step S117). This determination is made based on whether or not the luminance difference between the block and the pixel calculated by the equations (2) and (3) is equal to or greater than a predetermined value. If the result of this determination is that the luminance difference between the block and pixel is not greater than or equal to a predetermined value, the process proceeds to step S119 without performing the process of step S118. However, if the luminance difference of the row or column is greater than or equal to a predetermined value and the luminance of the block or pixel is higher than the others, the luminance correction data of the block or pixel is set so as to reduce the drive voltage of the block or pixel. It is set and stored in the correction data memory 116 (step S118).

Subsequently, it is determined whether or not the pixel is a block or pixel having a lower luminance than the other (step S119). This determination is made based on whether or not the luminance difference between the block and the pixel calculated by the equations (2) and (3) is less than a predetermined value. As a result of the determination, if the luminance difference between the block and the pixel is not less than the predetermined value, the process proceeds to step S1121 without performing the process of step S120. However, if the luminance difference between the block and the pixel is less than a predetermined value and the luminance is lower than that of the other block or pixel, the luminance correction data of the block or pixel is set to increase the drive voltage of the block or pixel. It is set and stored in the correction data memory 116 (step S120).
Note that the predetermined value used in step S117 is a positive value and the predetermined value used in step S119 is preferably a negative value, but both may be the same value.

  Next, it is determined whether or not the block or pixel subjected to the above steps S117 to S120 is the last block or pixel in the display panel 112 (step S121). If it is not the last row, the next block and pixel are selected (step S122), and the processing from step S117 is repeated. Then, if the processing of steps S117 to S120 is performed up to the last block and pixel (step S121; YES), the control circuit 115 controls the X driver 113 and the Y driver, and the drive signal of each block and pixel is The block and pixel drive signals stored in the correction data memory 116 are corrected and output based on the luminance correction data of the block and pixels (step S123, FIG. 4J). As a result, as shown in FIG. 4K, luminance unevenness in units of blocks and pixels is also corrected.

  In the above description, an image picked up by the image pickup device 121 is used. However, by connecting the switch 124 to the video / audio input circuit 29 side in the opposite direction to that shown in FIG. It is also possible to perform similar control using the captured image. In this embodiment, the luminance unevenness is adjusted. However, as shown in a second embodiment described later, the gradation characteristics, color temperature, color balance, and other screen characteristics of the image are adjusted. You may make it adjust.

  FIG. 5 is a diagram showing a configuration example of a display drive circuit when the display panel 112 is a PDP. That is, the luminance unevenness correction signal unit 160 generates a correction signal based on the detection signal of luminance unevenness and outputs the correction signal to the control circuit 161 and the high voltage power source 167. The signal processing unit 162 processes a video signal and the like and inputs the processed video signal to the control circuit 161. The control circuit 161 outputs the scanning signal to the Y maintaining driver 163 and outputs the data signal to the address driver 164. The high voltage power supply 167 is configured to supply drive voltages to the X scan driver 165 and the Y scan driver 166 of the PDP 168, and the Y sustain driver 163 and the address driver 164.

  In the PDP 168, as shown in FIG. 6, partition walls 171 of about 100 μm are formed between the front and rear glass substrates 169 and 170 to form a discharge cell, and the three primary color RGB phosphor layers 172 are formed inside the cell. Form. A set of RGB cells is one display pixel 173. After the inside of the cell is evacuated, a gas such as neon (Ne), xenon (Xe), or helium (He) is sealed. When a voltage is applied to the cell with the electrode, discharge occurs inside the cell, ultraviolet rays are generated, and the phosphor layer 172 inside the cell is excited to emit light. In FIG. 6, 174 is an insulating layer, 175 is a cathode electrode, 176 is an electron emission portion (emitter), 177 is a gate electrode, and 178 is an anode electrode (unit). The anode electrode (unit) 178, the gate electrode 177, and the cathode electrode 175 are connected to the control circuit 161 via the anode electrode control circuit 179, the gate electrode control circuit 180, and the cathode electrode control circuit 181, respectively. Become

  The PDP uses a field unit full parallel simultaneous drive method and a full screen simultaneous light emission method in which all pixels emit light simultaneously. In the mainstream AC (alternating current) drive type PDP, electrodes are covered with a dielectric layer and a protective layer, and a sustain pulse voltage whose polarity is reversed in a half cycle is supplied to the discharge cell. When a write pulse is applied from the dress electrode, discharge begins, and the generated positive ions and electrons are accumulated on the surface of the protective layer of magnesium oxide (MgO), and the discharge where reverse voltage (wall charge) is generated stops. To do. When the polarity of the sustain pulse changes, discharge in the reverse direction occurs due to wall charges, and discharge in the reverse direction is repeated every half cycle of the sustain pulse. An erase pulse is used to stop the discharge. One field is divided into 8 to 12 subfields (child screens), and the luminance is weighted. In the case of eight fields, the luminance can be controlled to 2 8 = 256 gradations.

  In the AWS (Address While Sustain) driving method shown in FIG. 7A, writing, displaying, and erasing are sequentially performed along the time axis, but ADS (Address and Display Separated) driving shown in FIG. 7B is performed. System = address / display period separation type subfield method, in which an address period for writing data indicating which cells (pixels) are to be illuminated and a light emission period for actually illuminating cells are temporally separated, and each pixel is first Address data is written at a high speed, and after the writing operation, the entire surface is made to emit light simultaneously, so that the display period can be arbitrarily set. That is, a data signal is stored in the address electrode and a scan signal is stored in the Y electrode, and a small discharge (preliminary discharge) is performed between the address electrode and the Y electrode to determine whether or not to discharge each cell. Full display from. When the above-described reverse voltage (wall voltage) remains due to the preliminary light emission, and the entire surface emits light, only the cell with the wall charge remaining emits light.

  FIG. 8 is a diagram showing the configuration of various emitters in the FED. (A) is a figure which shows the example of a solid action type | mold emitter, In the figure, 182 is a cathode electrode, 83 is a micro dip (emitter), 184 is an insulating layer, 185 is a gate electrode. (B) is a diagram showing a CNT (carbon nanotube) electrode type, in which 187 is a CNT layer (emitter), 188 is a cathode electrode, 189 is an insulating layer, 190 is a gate electrode, and 191 is an emission hole. (C) is a diagram showing a surface conduction (SCE) type, in which 195 is a substrate and 135 is an element film. (D) is a diagram showing a BSD type, in which 186 is an electrode. (E) is a diagram showing an MIM type, in which 192 is an upper electrode power supply wiring lower layer, 193 is a lower electrode, 194 is a tunnel insulating film, 195 is a substrate, 196 is a protective insulating layer, 197 is an interlayer insulating film, 198 is an upper electrode, and 199 is an upper electrode power supply wiring.

  (Modification of the first embodiment)

9 to 11 are diagrams showing modifications of the configuration for imaging the image display surface of the display panel 112 by the imaging element 121. FIG.
FIG. 9 shows a scanning-type luminance unevenness detection mechanism using a rotary scanning mirror and an f-θ lens. An imaging lens 1 is disposed in front of the imaging element 121, and a rotary scanning mirror (polygon mirror) 4 that is rotationally driven by a motor 2 is disposed in front of the imaging lens 1. On the other hand, in the upper part on the display surface side of the display panel 112, a mirror 5 having a mirror surface on the lower surface side is disposed obliquely along the upper edge of the display panel 112. A cylindrical lens 6 is disposed along the line. Further, an f-θ lens is disposed between the mirror 5 and the rotary scanning mirror 4.

  In such a configuration, when the rotary scanning mirror 4 rotates in a certain direction (arrow direction) as the motor 2 rotates, the image of the display panel 112 that is transmitted through the cylindrical lens 6 and reflected by the mirror 5 is viewed from one end side. Scanning is performed on the other end side (white arrow). This image is projected onto the image sensor 121 by the imaging lens 1. Therefore, the display surface side of the display panel 112 can be captured by capturing these scanned images with the image sensor 121.

  FIG. 10 shows a scanning-type luminance unevenness detection mechanism using a rotating scanning mirror and a curved surface mirror. An imaging lens 1 is disposed in front of the imaging element 121, and a rotary scanning mirror (polygon mirror) 4 that is rotationally driven by a motor 2 is disposed in front of the imaging lens 1. On the other hand, the curved mirror 8 is disposed along the upper edge of the display panel 112 at the upper part of the display panel 112 on the display surface side. The curved mirror 8 has an arc shape centered on the rotation center of the rotary scanning mirror 4 and has a cross-sectional shape curved inward, and a mirror surface is provided on the inner side.

In such a configuration, when the rotary scanning mirror 4 rotates in a certain direction (arrow direction) as the motor 2 rotates, the image of the display panel 112 reflected by the curved surface mirror 8 is changed from one end side to the other end side (white). (Scanning arrow) is scanned. This image is projected onto the image sensor 121 by the imaging lens 1. Therefore, the display surface side of the display panel 112 can be captured by capturing these scanned images with the image sensor 121.
In the configuration example shown in FIGS. 9 and 10, the image sensor 121 is used, but a line photosensor may be used.

  FIG. 11 shows a configuration example in which a mirror that hops up (can be protruded / stored) is provided on the outer frame portion 132 surrounding the display panel 112. That is, a rectangular concave portion 10 is formed in the front center of the outer frame portion 132 at the lower central portion, and a circular hole 11 is provided in the central portion of the concave portion 10. In the hole 11, an image sensor 121 is disposed at the back, and the imaging optical system 12 is disposed on the front side of the image sensor 121. In addition, one end of each of the link mechanisms 13 and 13 is pivotally supported at both ends of the recess 10, and the other end of the link mechanisms 13 and 13 has a shape that matches the inside of the recess 10. The hop-up part 14 is fixed. Inside the hop-up unit 14, a mirror 15 made of a plane mirror or a curved mirror is provided.

  In the above configuration, when the imaging of the display panel 112 is not performed, the link mechanisms 13 and 13 are bent when the hop-up portion 14 is pressed, and the hop-up portion 14 is accommodated in the recess 10. When the display panel 112 is imaged, when the hop-up unit 14 is pulled out, the link mechanisms 13 and 13 are expanded and face the front of the imaging optical system 12. Therefore, the display surface of the display panel 112 is reflected by the mirror 15 and imaged on the image sensor 121 by the imaging optical system 12, and thus the image of the display surface of the display panel 112 can be captured by the image sensor 121. .

  Even in the case of using the modified examples shown in FIGS. 9 to 11 described above, by executing the processing according to the flowchart shown in FIG. By performing distortion correction processing, image data that is an original rectangle when the display panel 112 is viewed from substantially the front may be generated. In other words, the image data captured by the image sensor 121 may be corrected to an image that is an original rectangle when the display panel 112 is viewed from substantially the front by coordinate conversion or distortion correction processing after shooting, or before the image is captured. The display panel 112 may be corrected to an original rectangular image viewed from the front by the system and guided to the image sensor 121, or corrected by the optical system before photographing and guided to the image sensor 121. And you may make it correct | amend by the coordinate transformation or distortion correction process after imaging | photography.

  (Second Embodiment)

  12 to 14 show a second embodiment of the present invention. As shown in FIG. 12, the present embodiment includes a TV receiver 200 and a remote control transmitter 250. The TV receiver 200 has a flat rectangular display panel 201 made of LCD, PDP, FED, and the like, and a code receiving unit 203 is provided at the lower part of the front surface of an outer frame unit 202 surrounding the display panel 201. . On the other hand, the remote control transmitter 250 is a substantially rectangular box, and a remote control operation key 251 is disposed on the upper surface portion, a code transmission portion 252 is provided on the front surface, and an optical system and imaging camera is disposed on the upper portion. A portion 253 is provided.

  FIG. 13 is a block diagram showing circuit configurations of the TV receiver 200 and the remote control transmitter 250. The TV receiver 200 has a front end 204. The front end 204 includes a terrestrial digital tuner 206 connected to a terrestrial analog broadcast antenna 205 and a terrestrial digital broadcast antenna 222, and a BS / 110 degree CS digital broadcast antenna 207. BS / 110 degree CS digital tuner 208 connected to is provided. The terrestrial digital tuner 206 is connected to the DOD / OFDM demodulation circuit 209, and the BS / 110 degree CS digital tuner 208 is connected to the OPSK demodulation circuit 210.

  A digital TV system LSI 211 is arranged at the output stage of the front end 204. This digital TV system LSI 211 includes a DEMUX video / audio / data separation unit 212, an MPEG2 / H. An H.264 decoder 213, a graphic engine 214, a format converter 215, and a CPU core 216 are provided.

  An LCD / PDP / SED back-end processor 217 for controlling the display of the display panel 201 is provided at the output stage of the system LSI 211. The back-end processor 217 is provided with an RGB processor 218 and a display driver 219, and the display driver 219 includes an X driver 220 and a Y driver 221.

  An analog TV tuner 223 is connected to the terrestrial analog broadcast antenna 205 and the terrestrial digital broadcast antenna 222. The analog TV tuner 223 includes an A / D converter 122, a ghost removal circuit 225, and a three-dimensional YC separation circuit 226. Via the DEMUX video / audio / data separation unit 212 of the system LSI 211. The TV receiver 200 is provided with an external input terminal 227 and a DVD / VTR 228. The external input terminal 227 is connected to the DEMUX video / audio / data separation unit 212 via the video / audio input IF 229, and the DVD / VTR 228 is connected to the three-dimensional YC separation circuit 226 via the A / D converter 230. Yes.

  The CPU core 216 of the system LSI 211 is connected to the RGB processor 218 via a bus 231, and includes a program memory (flash memory) 232, a large capacity memory 233, an HDD device 234, and a remote control receiving unit 235. It is connected. The program memory 232 stores a program for executing necessary processing in the TV receiver 200 according to the present embodiment, and the system LSI 211 having the CPU core 216 operates according to this program, and thereby performs RGB The processor 218 and the like are controlled. The remote control receiving unit 235 is connected to a light receiving sensor 236 disposed in the code receiving unit 203.

  Further, a controller 237 and a LAN processing LSI 238 are connected to the bus 231. An operation input unit 242 and a memory card interface 239 are connected to the controller 237, and a memory card 240 is detachably connected to the memory card interface 239. Further, an Ethernet (registered trademark) connector 241 is connected to the LAN processing LSI 238.

  On the other hand, the remote control transmitter 250 is provided with an infrared LED 254 disposed at the front end of the code transmission unit 252 and an optical system 255 disposed at the front end of the optical system & imaging camera unit 253. . An imaging element 256 is disposed behind the optical system 255, and the imaging element 256 is connected to the transmission code encoder 259 via the imaging signal processing unit 257 and the image processing unit 258. The transmission code encoder 259 is connected to the infrared LED 254 via the transmission unit 260 and to the remote control operation key 251.

  The remote control transmitter 250 has a built-in microcomputer (not shown), and each unit is controlled by the microcomputer. In the TV receiver 200, a video camera 270 can be connected to the external input terminal 227 through an output terminal 271. The Ethernet (registered trademark) connector 239 can be connected to an external server device 262 via an access point or the like.

  In the present embodiment having the above configuration, when the user uses the remote control transmitter 250, the code transmission unit 252 and the optical system & imaging camera unit 253 are directed to the TV receiver 200 as shown in FIG. . In this state, the microcomputer of the remote control transmitter 250 executes processing according to the flowchart shown in FIG. First, based on the state of the operation key 251 that is constantly monitored, it is determined whether or not there is a key operation (step R201), and the process waits until there is a key operation. If there is a key operation, it is determined whether or not it is an operation of a “screen adjustment key” (step R202). If the operation is not a “screen adjustment key” operation but another key operation such as a channel change key or a volume adjustment key, the device code of the remote control transmitter 250 and the code corresponding to the key are transmitted in infrared. (Step R211).

  If the operation is a “screen adjustment key”, the built-in camera unit, that is, the imaging element 256, the imaging signal processing unit 257, the image processing unit 258, and the like are activated to perform a shooting operation (step R203). Thereby, the subject including the display panel 201 of the TV receiver 200 is imaged. Next, a TV screen area, that is, a display panel 201 area is extracted from the photographed image (step R204). At this time, the user rarely positions the optical system & imaging camera unit 253 directly in front of the display panel 201, and the captured image is captured from an oblique direction. Therefore, by converting the image data of the captured TV screen extracted in step R04 or performing distortion correction processing, the image data of the TV screen that is the original rectangle when the display panel 201 is viewed from the front is generated. (Step R205).

  Next, it is determined whether or not screen information detection is instructed by the user's operation with the operation key 251 (step R206). When the screen information detection is not instructed, the processing of step R207 is executed. Instead, the process proceeds to step R208. Further, when the detection of screen information is instructed, the screen information is detected and extracted from the photographed image of the extracted TV screen area (step R207).

  Subsequently, the TV screen image data extracted in R204 or the screen information extracted in Step R207 is compression-encoded (Step R208), and the compression-encoded image data or the image information is encoded in a transmission code. (Step R209). Then, together with the device code of the remote control transmitter 250 and the code of the “screen control key” whose operation is detected in step R202, the image data of the screen and the encoded code of the image information are transmitted (step R210).

  On the other hand, the system LSI 211 of the TV receiver 200 executes processing according to the program as shown in the flowchart of FIG. When the remote control code is transmitted from the remote control transmitter 250 in the processes of steps R210 and R211, the remote control code is received and the remote control receiving unit 235 performs the decoding process (step T201). Then, based on the decoded remote control code, it is determined whether or not the remote control code of the remote control transmitter 250 corresponding to the TV receiver 200 has been received (step T202). If it is not the remote control code of the corresponding remote control transmitter 250, the standby state is formed without executing the subsequent processing. If it is the remote control code of the corresponding remote control transmitter 250, it is determined whether or not the “screen adjustment key” code has been received (step T203), not the “screen adjustment key” code but the channel change key or volume control. If it is another code such as a key, the processing corresponding to the other key is executed (step T204). If the “screen adjustment key” code is received, the image data or image information of the screen is decoded from the associated received code (step T06).

  Subsequently, it is determined whether or not it is time to perform the luminance unevenness adjustment process based on an instruction by the user's operation on the operation input unit 242 or a periodic luminance unevenness adjustment processing period programmed in advance ( Step T206). If it is not time to perform the luminance unevenness adjustment process, the image gradation characteristics, color temperature, color balance, and other screen characteristics are detected from the image data or screen information of the TV screen (step T207). Then, the gradation characteristics, color temperature, color balance and other screen characteristics of the detected image, and the ideal gradation characteristics, color temperature, and image characteristics of the TV receiver 200 stored in the program memory 232 in advance. Comparing the color balance and other screen characteristics, and instructing the back-end processor 217 to obtain the ideal image gradation characteristics, color temperature, color balance and other screen characteristics based on the difference between the two. (Step T208). By operating the back-end processor 217 in accordance with this instruction, the display panel 201 is set with ideal tone characteristics, color temperature, color balance, and other screen characteristics of the TV receiver 200. It becomes.

  If the result of determination in step T206 is the timing for adjusting brightness unevenness, the brightness unevenness area is detected from the image data or detected image information on the TV screen (step T209), and the brightness unevenness area and the brightness unevenness are detected. Depending on the degree, the corresponding display drive circuit is controlled to adjust the luminance of the area (step T210). The detailed processing procedure of steps T209 and T210 is the same as the processing of steps S107 to S123 in the flowchart shown in FIG. Therefore, as in the first embodiment, the luminance unevenness in units of rows and columns is corrected, and the luminance unevenness in units of blocks and pixels is also corrected.

  In step R202 of FIG. 14A, it is determined whether or not the “screen adjustment key” is operated. In step R206, it is determined whether or not detection of screen information is instructed. Based on a pre-programmed periodic adjustment process cycle of screen characteristics, it is determined whether it is time to perform a screen characteristic adjustment process, or a pre-programmed periodic screen information detection period Based on the above, it may be determined whether it is time to detect the screen information, and the process may be executed according to the determination result.

  (Third embodiment)

  15 and 16 show a third embodiment of the present invention. As shown in FIG. 15, the present embodiment includes a TV receiver 300 and a remote control transmitter 350. The TV receiver 300 includes a tuner 302 connected to an antenna 301, and the tuner 302 is controlled in reception frequency by a channel selection control unit 303. The TV signal of the specific station received by the tuner 302 whose reception frequency is controlled is input to the video / color signal processing circuit 306 and the control circuit 307 of the video signal processing unit 305 via the video IF 304. The video signal processing unit 305 includes a chroma signal output circuit 308 and a test pattern generation circuit 309 along with the video / color signal processing circuit 306. The test pattern video signal generated by the test pattern generation circuit 309 and the video / color signal processed by the video / color signal processing circuit 306 are output to the display drive circuit 310 via the chroma signal output circuit 308. The display drive circuit 310 is a circuit for driving a flat and rectangular display panel 311 made of LCD, PDP, FED, etc., and has an X driver 312 and a Y driver 313, and is supplied from the chroma signal output circuit 308. The output is given to the X driver 312.

  The control circuit 307 includes a CPU, a ROM storing a program for operating the CPU, a work RAM, and peripheral circuits thereof. The chroma signal output circuit 308, the X driver 312 and the Y driver 313, etc. Control each part. An operation input unit 314 and a remote control decoder 315 are connected to the control circuit 307. The operation input unit 314 is provided with various operation buttons such as a power button and a channel selection button. An infrared light receiving unit 316 is connected to the remote control decoder 315, and the light receiving unit 316 receives an infrared signal transmitted from the remote control transmitter 350 by an operation.

  On the other hand, the main body 351 of the remote control transmitter 350 is provided with an opening 352 at the tip thereof, and a slit 353 is provided in the main body 351 and behind the opening 352. A prism / diffraction grating 354 and a photosensor array 355 are sequentially arranged behind the slit 353, and the photosensor array 355 is connected to a driver / sense amplifier 356. The driver / sense amplifier 356 is connected to a chromaticity coordinate / color temperature measurement unit 357, and the chromaticity coordinate / color temperature measurement unit 357 sequentially includes an A / D converter 358, an energy distribution table memory 359, and a stimulus value on the output stage side. A calculation unit 360, a chromaticity coordinate calculation unit 361, and a color temperature calculation unit 362 are provided, and a color matching function data memory 363 is connected to the stimulus value calculation unit 360. The chromaticity coordinate calculation unit 361 and the color temperature calculation unit 362 are connected to a chromaticity coordinate or color temperature information memory 364, and data from the chromaticity coordinate or color temperature information memory 364 is a control circuit 365 formed of a microcomputer. The encoder (encoder) 366 is provided.

  A ROM 367 as a program memory storing a program and a RAM 368 as a data memory are connected to the control circuit 365, and each unit including the chromaticity coordinate / color temperature measuring unit 357 is controlled. The encoder 366 is connected to a remote control code table 369 storing remote control codes and a key operation unit 370, and the key operation unit 370 is provided with a test pattern display key 371, a screen adjustment key 372, and the like. . The output stage of the encoder 366 is provided with an infrared transmitter 373 and an infrared LED 374 connected thereto.

  In the present embodiment having the above configuration, when the user uses the remote control transmitter 350, the front end portion is directed to the TV receiver 300 as in the second embodiment described above. In this state, the remote control transmitter 350 operates as shown in the flowchart of FIG. 16A when the control circuit 365 executes processing according to the program. First, based on the state of the key operation unit 370 that is constantly monitored, it is determined whether or not there has been a key operation (step R301), and the system waits until there is a key operation. If there is a key operation, it is determined whether it is an operation of the screen adjustment key 372 or the test pattern display key 371 (step R302). If it is not the operation of the screen adjustment key 372 or the test pattern display key 371 but another key operation such as a channel change key or a volume adjustment key, other key processing is executed (step R303).

  When the screen adjustment key 372 or the test pattern display key 371 is operated, a test pattern image display command (“screen adjustment key” is displayed on the TV receiver 300 together with the remote control code that is the code of the remote control transmitter 350. "Or" test pattern display key "code) (step R304). Next, r￣ (λ), g￣ (λ), b￣ (λ), or x￣ (λ), y￣ (λ), z￣ () previously stored in the color matching function data memory 363. Color matching function data representing relative sensitivity characteristics for each human wavelength band such as λ) is read and set (step R305).

Next, as will be described later, a predetermined time is waited until the TV receiver 300 displays a test pattern or the like (step R306). If the predetermined time has elapsed, the chromaticity coordinate / color temperature measurement unit 357 is controlled. By operating, a photometric process of the color chart or test pattern image 320 (see FIG. 15) displayed on the display panel 311 of the TV receiver 300 is performed (step R307). Then, by this photometric processing, the energy distribution for each wavelength is measured, and an energy distribution table L (λi) is created (step R308). Further, using the created energy distribution table L (λi), tristimulus values of R, G, and B are calculated as shown in the following exemplary formula (step R309).
R = Σi {r￣ (λi) · L (λi)},
G = Σi {g￣ (λi) · L (λi)},
B = Σi {b￣ (λi) · L (λi)}

  Further, the chromaticity coordinates (r, g, b) are calculated and determined from the R, G, B tristimulus values obtained in step R309 by the following exemplary formula (step R310). Next, it is determined whether or not it is a timing for coordinate conversion based on an instruction by a user operation on the key operation unit 370 or a periodic cycle for coordinate conversion programmed in advance (step S311). If not, the process proceeds to step R314 without performing the process of step R312. If it is the timing for coordinate conversion, the chromaticity coordinates (r, g, b) are changed to other color specifications such as X, Y, Z coordinates, x, y, z coordinates, or L * a * b coordinates. Conversion into system and chromaticity coordinates (step R312).

  Subsequently, a correlation color temperature Ta, a deviation Δuv from the black body radiation locus, and the like are calculated from the chromaticity coordinates (r, g, b) (step R313), and the chromaticity of each test pattern sequentially switched in step T308 described later. The coordinates and the color temperature are sequentially stored in the memory (RAM 368) (step R314). Further, it is determined whether or not a predetermined number of color temperatures corresponding to each test pattern sequentially switched in step T308, which will be described later, is measured (step R315), and the steps until the predetermined number of color temperatures are measured are determined. The processing from R306 is repeated. When the color temperature measurement for a predetermined number of patterns is completed, screen information such as the color temperature or chromaticity coordinates of each pattern is encoded by the encoder 366, and the TV is transmitted from the infrared transmitter 373 and the infrared LED 374 together with the remote control code. Transmission is performed toward the receiver 300 (step R316).

  On the other hand, when the remote control code is transmitted together with the test pattern image display command from the remote control transmitter 350 side by the processing in step R304, the TV receiver 300 receives this and decodes it (step R301). . Then, based on the decoded remote control code, it is determined whether or not the remote control code of the remote control transmitter 350 corresponding to the TV receiver 300 has been received (step T302). If it is not the remote control code of the corresponding remote control transmitter 350, the standby state is formed without executing the subsequent processing. If it is the remote control code of the corresponding remote control transmitter 350, it is determined whether or not the “screen adjustment key” or “test pattern display key” code, which is a test pattern image display command, has been received (step T303). If it is not both codes but other codes such as a channel change key and a volume adjustment key, processing corresponding to the other keys is executed (step T304). If the code is a “screen adjustment key” or “test pattern display key” which is a test pattern image display command, a predetermined test pattern or color chart image is generated and a TV screen (display panel) is displayed. 311) (step T305).

  Next, the remote control transmitter 350 side waits for the processing time corresponding to the time required for the processing of steps R308 to R315 described above (step T306), and the test displayed in step T305 until a predetermined time elapses (step T307). The display state of the pattern etc. is continued. If the predetermined time has elapsed, it is determined whether or not the predetermined number of patterns has been displayed (step T309), and the processing from step T305 is repeated until the display of the predetermined number of patterns is completed.

  When the display of the predetermined number of patterns is completed, the remote control code sent together with the screen information such as the color temperature or chromaticity coordinate of each pattern from the remote control transmitter 350 side by the processing in step T316 described above. Is received and decrypted (step R310). Then, based on the decoded remote control code, it is determined whether or not the remote control code of the remote control transmitter 350 corresponding to the TV receiver 300 has been received (step T311). If it is not the remote control code of the corresponding remote control transmitter 350, the standby state is formed without executing the subsequent processing. If it is the remote control code of the corresponding remote control transmitter 250, the received code of screen information such as the chromaticity coordinates or color temperature of each received pattern is decompressed and decoded (step T312). Further, based on the received screen information such as chromaticity coordinates or color temperature, the display driving circuit 310 is controlled to adjust the color balance and the like of the screen (display panel 311) (step T313). Thereafter, the display of the test pattern and the color chart image is stopped and a normal screen is displayed (step T314).

  FIG. 17 is a diagram illustrating a configuration example of a test pattern image when a test pattern or a color chart is displayed on the display panel in the first, second, and third embodiments described above. In the figure, (a) shows luminance 0% (black), luminance 10% (gray), luminance 20% (gray) to 90% for detecting and adjusting luminance gradation characteristics such as gamma (γ) characteristics. An example of a grayscale image for each gradation, such as (gray) and luminance 100% (white), is shown. (B) is similar to an SMPTE color bar (SMPTE: American Film and Television Engineers Association) for detecting and adjusting color temperature, color balance, color reproducibility, etc., white, yellow, cyan (light blue), An example of a color chart image in which color samples such as green, magenta (red purple), red, blue, and black are arranged is shown. (C) similarly shows an example of an image of a composite test pattern for detecting and adjusting color temperature, color balance, color reproducibility, and the like.

  FIG. 18 is an example of a dynamic or test pattern in which gray scales, color chart color samples, etc. are sequentially switched in a time-division manner and displayed within the same partition area. Even when only the same point on the screen is photographed or detected, a plurality of different color sample patterns can be photographed or detected in order.

Similarly, FIG. 19 shows the gradation of the brightness of an image obtained by capturing a test pattern image such as a gray scale or a color chart displayed on the display panel in the first, second, and third embodiments described above. A method for obtaining the characteristics will be described. The grayscale output luminance data of each input grayscale value is measured, the output luminance corresponding to the input grayscale luminance is stored in the memory, and a function representing the input / output characteristics of the measured display panel is expressed as Y = Applying to X ^γ, etc., the luminance γ (gamma) can be calculated to obtain the gradation characteristics.

  FIG. 20 shows an example of a luminance variation correction circuit and a gamma correction circuit that convert and correct gradation characteristics, contrast, and the like by conversion processing of luminance distribution based on the calculated gradation characteristics such as the gamma characteristic of the screen brightness. FIG. As shown in the figure, the luminance / chromaticity measurement unit 400 includes an acquisition unit 401 that acquires luminance information from an external camera, a measurement unit 402 that measures RGB luminance from the luminance information acquired by the acquisition unit 401, and this measurement. A calculation unit 403 that calculates chromaticity coordinates or color temperature based on the RGB luminance measured by the unit 402; a detection unit 404 that detects luminance data for each gradation based on the luminance information; A calculation unit 405 that calculates input / output characteristics (gamma) based on luminance data for each gradation is provided.

  The chromaticity coordinates or color temperature calculated by the calculation unit 403 is given to a color temperature correction / color balance correction unit 406, and the input / output characteristic (gamma) calculated by the calculation unit 405 is given to a gamma correction unit 407. It is done. A gamma correction unit 407 corrects R, G, and B of the video signal based on the input / output characteristics (gamma) to generate R ′, G ′, and B ′. The R ′, G ′, and B ′ are chromaticity. The coordinate and color temperature detection unit 408 and the WB control unit 409 are output. A chromaticity coordinate / color temperature detection unit 408 detects the chromaticity coordinates and color temperature of the R ′, G ′, and B ′, and inputs them to the color temperature correction / color balance correction unit 406. The color temperature correction / color balance correction unit 406 includes chromaticity coordinates, chromaticity coordinates of R ′, G ′, and B ′ detected by the color temperature detection unit 408, and color temperatures calculated by the calculation unit 403. Based on the degree coordinate or color temperature, control data is generated and output to the WB control unit 409. The WB control unit 409 controls the gains of R ′, G ′, and B ′ based on the control data. , R ″, G ″, B ″ are output. The outputs R ″, G ″, B ″ from the WB control unit 409 are converted into Y, U, V data by the color matrix 410, and the Y, U, Each V data is filtered by the LPF 411, converted into a video signal (NTSC composite signal) by the NTSC encoder 412, and displayed as an image on the display panel 420 described later.

  On the other hand, the luminance variation correction unit 413 detects the luminance of each matrix, block, pixel, pixel average, matrix average, and block average based on the luminance information from the external camera acquired by the acquisition unit 401. Calculated by the luminance correction data calculation unit 415, the luminance correction data calculation unit 415 that calculates the luminance correction data of each matrix, block, and pixel based on the luminance detected by the detection unit 414, and the luminance correction data calculation unit 415. A memory 416 for storing brightness correction data for each matrix, block, and pixel is provided. Further, the brightness variation correcting unit 413 is provided with an image data memory 417 for temporarily storing R ″, G ″, B ″ output from the WB control unit 409. The temporarily stored R ″, G ″, B ″ image data is output to the memory 416 and the luminance data correction conversion unit 418 of the image data. The luminance data correction conversion unit 418 corrects R ″, G ″, B ″ image data based on the luminance correction data for each matrix, block, and pixel read from the memory 416, and performs luminance data correction conversion of the image data. This corrected luminance data is given to the display drive circuit 419, and the display drive circuit 419 operates to correct the image quality (luminance) of the display panel 420.

  21 to 23 show examples of correcting and adjusting the display color temperature and color balance of the display image based on the detected chromaticity coordinates and color temperature. In these drawings, FIG. 21 is a diagram showing a circuit example of chromaticity correction and color balance correction of a video signal, and shows an example of converting an image signal having a color temperature of 6500K (Kelvin) into 5000K. The acquisition unit 500 acquires color temperature and chromaticity coordinate information of an external camera that captures a display surface of the display panel 512, which will be described later, and provides the color temperature correction and color balance correction unit 501 with the color temperature. On the other hand, the gamma correction unit 502 corrects R, G, and B of the image signal to generate R ′, G ′, and B ′, and these R ′, G ′, and B ′ are RGB gain control units 504. , 505, 506 and the detection unit 503. The detection unit 503 detects the color temperature and color balance of the R ′, G ′, and B ′, and the color temperature correction and color balance correction unit. 501 is given.

  The color temperature correction and color balance correction unit 501 is based on the color temperatures and color balances of R ′, G ′, and B ′ detected by the detection unit 503 and the color temperature and chromaticity coordinate information from the acquisition unit 500. Then, color temperature correction and color balance correction are performed to convert the color temperature 6500K into 5000K, which is supplied to the gain control units 504, 505 and 506. Each gain control unit 504, 505, 506 controls the gain of R ', G', B 'based on the corrected color temperature 5000K, and outputs R ", G", B ". The output R ″, G ″, and B ″ are converted into Y, U, and V data by the color matrix 507, and the Y, U, and V data are each filtered by the LPF 508 and the video signal ( NTSC composite signal) and displayed as an image on a display panel 512 described later. On the other hand, the digital display control unit 510 controls the display drive control circuit 511 based on R ″, G ″, B ″ output from the gain control units 504, 505, 506, and thereby the color of the display panel 512. The temperature will be adjusted.

  That is, for example, the moving body intensity of the energy in the wavelength band for each color temperature of black body radiation is, as shown in FIG. 22A, energy in a band having a long wavelength (close to red), such as 2900K, at a low color temperature. Is strong and the energy in the short wavelength band (near purple and blue) becomes weak, so it looks reddish. Conversely, for light with a high color temperature of 9300K, the energy in the long wavelength band (near red) It is weak and has a short wavelength (near purple and blue), so it appears bluish.

  In the color temperature correction, white balance correction is usually performed according to a color signal such as RGB of the image signal by a white balance control circuit such as the circuit of FIG. 21 described above. As in the embodiment, the white balance can be forcibly reset based on the color temperature and the chromaticity coordinates in the color signal measured by the camera or chromaticity meter provided in the outer frame or the remote control transmitter.

  For example, as shown in FIG. 22B, the reference color temperature of the RGB signal of the color temperature corresponding to the detected color temperature (eg, 6500 K) from the RGB component relative intensity data corresponding to each chromaticity. (Example: 5000K) Relative intensities (eg, R = 0.76, G = 1.0, B = 1.14) were obtained, and the RGB color difference signals were converted to the white color shown in FIG. The balance control circuit adjusts the gain for each color difference signal so that the relative intensity is inversely proportional (for example, R × 1 / 0.76, G × 1/1, B × 1 / 1.14 times). Then, an RGB signal having a target reference color temperature (eg, 5000K) can be obtained.

  FIG. 23 is also an example of a color balance correction method. The chromaticity coordinates and (RY, BY) of each color sample detected from an image obtained by photographing a screen on which a color chart or the like is displayed. Etc.) Detect the deviation between the color difference data and the original chromaticity coordinates and color difference data of the color swatch, and adjust the screen balance to correct it based on the deviation (Cyan-Red axis, Magenta-Creen) Axis, Yellow-Blue axis, etc.) can be corrected by adjusting each color coordinate axis.

It is a block diagram which shows the 1st Embodiment of this invention. It is a figure which shows the arrangement configuration of the image pick-up element and optical system in this Embodiment. It is a flowchart which shows operation | movement of this Embodiment. It is an operation | movement transition diagram of this Embodiment. It is a figure which shows the structural example of the display drive circuit in case a display panel is PDP. It is explanatory drawing which shows the principal part of PDP. It is a figure which shows the example of the display drive method of PDP. It is a figure which shows the structural example of the cathode electrode part of SED and FED panel. It is a modification of the first embodiment and is a diagram showing an example of a scanning luminance unevenness detection sensor using a rotation operation mirror and an f-θ lens. It is a figure which is the same modification, Comprising: It is a figure which shows the example of the scanning-type brightness nonuniformity detection sensor by a rotation operation mirror and a curved surface mirror. It is a figure which is the same modification, and is an example of the brightness nonuniformity detection sensor by the imaging sensor which faces the mirror which hops up. It is a perspective view which shows the 2nd Embodiment of this invention. It is a block diagram which shows the circuit structure of TV receiver and remote control transmitter which concern on the embodiment. It is a flowchart which shows the process sequence of the remote control transmitter and TV receiver in the embodiment. It is a block circuit diagram of a TV receiver and a remote control transmitter according to a third embodiment of the present invention. It is a flowchart which shows operation | movement of the remote control transmitter and TV receiver in the embodiment. It is a figure which shows the structural example of the image of a test pattern or a color chart. It is a figure which shows the example of a time division switching of a test pattern. It is a figure which shows the measurement of a gamma characteristic (input / output characteristic of a brightness | luminance). It is a block diagram which shows the example of the correction circuit of a luminance variation, and a gamma correction circuit. It is a figure which shows the circuit structural example of the color temperature correction | amendment of a video signal, and color balance correction | amendment. (A) is a figure which shows the spectral distribution characteristic example (relative intensity when each spectral intensity of 5000K is set to 1) of black body radiation, (b) is the relative intensity of RGB component for every color temperature, and color temperature. It is a figure which shows the example of correction | amendment (gain control by the reciprocal number of relative intensity). It is a figure which shows the process of measurement and correction | amendment of a color balance.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 TV receiver 111 Display drive circuit 112 Display panel 113 X driver 114 Y driver 115 Control circuit 116 Correction data memory 117 Operation input part 118 Remote control decoder 119 Screen measurement part 121 Image sensor 122 A / D converter 123 Imaging signal processing part 125 Image memory 126 Coordinate transformation / distortion correction unit 127 Detection unit 131 Optical system 132 Outer frame unit 140 Remote control transmitter 150 Digital camera 151 Video output terminal 152 Imaging lens unit 160 Luminance unevenness correction signal unit 161 Control circuit 162 Signal processing unit 163 Y Maintenance driver 164 Address driver 165 X-scan driver 166 Y-scan driver 200 TV receiver 201 Display panel 202 Outer frame portion 203 Code receiver 204 Front end 219 Display driver 2 20 X driver 221 Y driver 232 Program memory 253 Imaging camera unit 300 TV receiver 307 Control circuit 308 Chroma signal output circuit 309 Test pattern generation circuit 310 Display drive circuit 311 Display panel 312 X driver 313 Y driver 314 Operation input unit 316 Infrared light reception Unit 350 remote control transmitter 351 body unit 352 opening 355 photo sensor array 357 chromaticity coordinate / color temperature measurement unit 358 A / D converter 359 energy distribution table memory 360 stimulus value calculation unit 361 chromaticity coordinate calculation unit 362 color temperature calculation 363 Color matching function data memory 364 Color temperature information memory 365 Control circuit 366 Encoder 367 ROM
368 RAM

Claims (13)

Display means for operating and displaying an image on the display surface;
Imaging means for imaging the display surface in a state in which the display means is operating;
Detecting means for detecting a state of an element related to display characteristics of the display surface based on an image captured by the imaging means;
An image display device comprising: control means for controlling display characteristics of the display means based on the state of an element related to the display characteristics detected by the detection means.   The image display apparatus according to claim 1, wherein the display unit displays an image for screen adjustment on the display surface when the imaging unit captures an image. The imaging means includes an imaging element that images the display surface from an oblique direction;
Correction means for correcting an image captured from an oblique direction by the image sensor into an image captured from a substantially front direction;
The image display apparatus according to claim 1, wherein the detection unit detects a state of an element related to display characteristics of the display surface based on the image corrected by the correction unit. The imaging means includes an imaging element;
The image display device according to claim 1, wherein the image pickup device includes light guide means for optically guiding the image on the display surface.   The image display apparatus according to claim 4, wherein the light guide unit includes a correction unit that corrects an image from an oblique direction of the display surface to an image from a substantially front direction.   The image display device according to claim 1, wherein the control unit controls at least one of luminance, gradation characteristics, color temperature, and color balance of the display surface. An image adjustment system including an image display device and a transmission device,
The image display device includes:
Display means for operating and displaying an image on the display surface;
Receiving means for receiving an image transmitted from the transmitting device;
Detecting means for detecting a state of an element related to display characteristics of the display surface based on the image received by the receiving means;
Control means for controlling the display characteristics of the display means based on the state of the elements related to the display characteristics detected by the detection means,
The transmitter is
Imaging means for imaging the display surface in a state in which the display means is operating;
An image adjustment system comprising: a transmission unit configured to transmit an image of the display surface imaged by the imaging unit to the image display device. An image adjustment system including an image display device and a transmission device,
The image display device includes:
Display means for operating and displaying an image on the display surface;
Means for receiving data indicating a state of an element related to display characteristics of the display surface transmitted from the transmission device;
Control means for controlling the display characteristics of the display means based on the data indicating the state of the elements related to the display characteristics of the display surface received by the receiving means;
The transmitter is
Detecting means for detecting a state of an element related to display characteristics of the display surface from the display surface in a state in which the display means is operating;
An image adjustment system comprising: transmission means for transmitting data indicating a state of an element related to the display characteristic detected by the detection means to the image display device.   The display unit of the image display device displays an image for screen adjustment on the display surface when the imaging unit of the transmission device or the detection unit operates. Image adjustment system.   10. The image adjustment system according to claim 7, wherein the control unit controls at least one of luminance of the display surface, color temperature or color balance of an image displayed on the display surface. . The transmission device is a remote control unit that remotely operates the image display device by transmitting a signal modulated to a predetermined frequency in response to a key operation.
The said transmission means modulates the data which show the state of the element relevant to the image of the said display surface, or the said display characteristic to the signal of the said predetermined frequency, and transmits. Image adjustment system. An image adjustment method in an image display apparatus having display means for operating and displaying an image on a display surface,
Imaging the display surface in a state where the display means is operating,
Based on the captured image, the state of the element related to the display characteristics of the display surface is detected,
An image adjustment method comprising: controlling display characteristics of the display means based on the detected state of the element related to the display characteristics. An image adjustment method in an image display apparatus having display means for operating and displaying an image on a display surface,
From the display surface in a state where the display means is operating, the state of an element related to the display characteristics of the display surface is detected outside the image display device,
Sending data indicating the state of the elements related to the detected display characteristics to the image display device,
The image display device receives data indicating the state of the element related to the transmitted display characteristic,
An image adjustment method, comprising: controlling display characteristics of the display means based on the received data indicating the state of an element related to the display characteristics of the display surface.

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