JP2012003155A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the whole firmware common for every series in a television receiver.SOLUTION: A register setting value table 22b comprising a record which stores respective panel-driving supply voltage values of a plurality of types of liquid crystal display panels 42, and register setting value groups is stored in an SPI flash memory 22. In an initial start-up of an apparatus, the register setting value group 56 corresponding to the value of the detected panel-driving supply voltage value is read from the register setting value table 22b, and the register setting value group 56 is set in a group of registers in a main device 21. This constitution can dispense with storing of the firmware including different register setting value groups for every type of liquid crystal display panel (for every inch liquid crystal display panel).

Description

  The present invention relates to a television receiver including a display panel such as a liquid crystal display panel.

  Conventionally, even in the same series (model) television receivers of the same manufacturer, if the number of inches of the display panel is different, the image quality setting such as the brightness and color of the display panel and the number of input / output terminals are different. For this reason, among the data included in the firmware, a register set value group consisting of parameters related to the image quality settings and the number of input / output terminals (parameters for setting in a register in the main device that controls the entire apparatus) (Value group) (data) could not be shared for each television receiver series (model). Therefore, even if the program portion of the firmware is the same for each television receiver series (model) regardless of the number of inches of the display panel, the entire firmware including the register set value group described above is assigned to each series. There was a problem that they could not be shared. Further, as described above, since the whole firmware cannot be shared for each series, a mounted digital printed circuit board (digital PCB (printed circuit board)) including a memory for storing firmware and the main device described above There was also a problem that it was not possible to share the same for each series.

  By the way, in the field of this type of device, a correction parameter register for storing a correction parameter for correcting a contrast adjustment value for the purpose of removing the influence of variation in display characteristics for each set in a display panel of a liquid crystal display device And an arithmetic circuit for calculating the corrected contrast adjustment value by adding the correction value specified by the correction parameter to the contrast adjustment value instructed by the MPU, and a display panel with a drive voltage obtained based on the corrected contrast adjustment value There is disclosed a display driver including a driving circuit for driving (see Patent Document 1). In addition, in a display device incorporating a large number of registers, initial values (register values) can be set and changed in the registers easily and in a short time, and the processing load on the microprocessor and the like can be reduced. A drive control method is disclosed (see Patent Document 2). Furthermore, when the display device is activated in the plug-and-play mode, the display device improves the reliability of the display device with respect to high image quality by quickly detecting a change in the register value from the appropriate value and reinitializing the register value. Is disclosed (see Patent Document 3). However, these inventions cannot solve the above problems.

JP 2003-263133 A JP 2005-70232 A JP 2008-197648 A

  The present invention solves the above-described problems, and an object of the present invention is to provide a television receiver that can share the entire firmware including a register set value group for each series.

  In order to solve the above problems, the invention of claim 1 is directed to a backlight as a light source, a tuner for extracting a video signal and an audio signal from a television broadcast signal received by an antenna, and a video signal extracted by the tuner. A drive unit that generates a drive voltage based on the output and outputs the generated drive voltage, a display panel that displays an image based on the drive voltage output from the drive unit, and a register setting according to the type of the display panel A group of registers in which values are set, and control means for controlling the entire apparatus according to the type of the display panel based on the register set value groups set in these registers; and the group of registers Firmware including data necessary for control of the control means including a register set value group to be set and a program necessary for control of the control means In a television receiver comprising storage means for storing and power supply means for supplying power to each part of the apparatus including the drive means, the value of the panel drive power supply voltage supplied from the power supply means to the drive means Further comprising a power supply voltage detecting means for detecting the register setting, wherein the storage means is a register setting comprising a record storing the panel drive power supply voltage value and the register set value group for each of a plurality of types of display panels. A value table is further stored, and the control means reads the register setting value group corresponding to the panel drive power supply voltage value detected by the power supply voltage detection means from the register setting value table when the apparatus is first started. Then, after this register set value group is set in the group of registers, the entire apparatus is started or restarted. Here, “type of display panel” in each claim includes the series (model) of the television receiver, the number of inches of the display panel, and the type of liquid crystal cell of the display panel. Accordingly, even if the series (model) of the two television receivers is the same, if the number of inches of the display panel of these television receivers or the type of the liquid crystal cell is different, these television receivers are used. The types of display panels are different.

  According to a second aspect of the present invention, in the television receiver according to the first aspect, connected to a measuring means for measuring a color temperature or luminance of an image displayed on the display panel, each record of the register setting value table is , Including the color temperature or luminance of the image corresponding to each of the plurality of types of display panels, and the control means corresponds to the value of the panel drive power supply voltage detected by the power supply voltage detection means when the apparatus is first activated. When the register set value group is read from the register set value table, it corresponds to the value of the panel drive power supply voltage detected by the power supply voltage detecting means in the record stored in the register set value table. When there are two or more records having the register set value group, the register corresponding to the color temperature or the luminance measured by the measuring unit is used. The set value group, read from the register set value table, set the register setting value group to the set of registers is for restarting the entire device.

  A third aspect of the present invention is the television receiver according to the first or second aspect, wherein the display panel is a liquid crystal display panel.

  According to the first aspect of the present invention, a register setting value table comprising a record storing a panel driving power supply voltage value and a register setting value group for each of a plurality of types of display panels is stored. At the first start-up, the register setting value group corresponding to the detected panel drive power supply voltage value is read from the register setting value table, and this register setting value group is set in a group of registers in the control means. . This eliminates the need to store firmware including different register setting values for each type of display panel, so there are variations in the number of inches of the display panel and the type of liquid crystal cells in the same series of television receivers. Even in this case, it becomes easy to share the entire firmware including the register set value group for each series. Further, as described above, since it becomes easy to share the entire firmware for each series, the storage means (such as a memory) for storing the firmware and the control means (such as the main device) for storing the firmware are connected to the same printed wiring board. When a digital printed circuit board (digital PCB (printed circuit board)) is mounted on the board, it is easy to share the digital printed circuit board for each series.

  According to the invention of claim 2, for example, in two or more television receivers in which the series and the display panel have the same number of inches and the panel drive power supply voltage value is the same, these television receivers Even when the types of liquid crystal cells are different, the color temperature or brightness of the image actually displayed on the display panel is measured, and the register set value group corresponding to the measured color temperature or brightness is obtained as a group in the control means. Can be set to register. Here, generally, when the type of liquid crystal cell is different, the color temperature and brightness of the image displayed on the display panel are different, so as described above, the color temperature of the image actually displayed on the display panel. Alternatively, by setting a register set value group corresponding to luminance in the above-described register, the control unit can control the entire apparatus according to the type of the liquid crystal cell of the display panel.

  According to the invention of claim 3, the effect described in claim 1 or claim 2 can be obtained in the television receiver including the liquid crystal display panel.

FIG. 3 is an electrical block configuration diagram of a main part of the television receiver according to the present embodiment and a color temperature or luminance measurement system. 4 is a diagram showing an example of data stored in a register setting value table stored in the television receiver. FIG. The flowchart of the register setting process performed at the time of the first starting of the television receiver.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following embodiments, an example in which the present invention is applied to a liquid crystal television receiver will be described. In addition, embodiment described below does not cover this invention, and this invention is not limited only to the following form.

  FIG. 1 shows an electrical block configuration of a main part of a liquid crystal television receiver (hereinafter abbreviated as a liquid crystal television) which is a television receiver according to the present embodiment. The liquid crystal television 1 receives a television broadcast signal (hereinafter abbreviated as a television broadcast signal) distributed from a broadcasting station, displays an image based on the television broadcast signal, and outputs sound based on the television broadcast signal. It is.

  The liquid crystal television 1 includes a digital printed circuit board 2 (hereinafter referred to as a digital PCB (printed circuit board)) on which various digital circuits are mounted and an analog printed circuit board 3 (hereinafter referred to as an analog PCB) on which various analog circuits are mounted. (referred to as “printed circuit board”), the liquid crystal display device 4, the backlight 5 serving as the light source of the liquid crystal display panel 42 (display panel) included in the liquid crystal display device 4, the speaker 6, and the user instructs the device body And a remote controller 7 for operation.

  The digital PCB 2 includes a main device 21 (control means) having a microcomputer function, an SPI (Serial Peripheral Interface) flash memory (storage means) 22, a tuner 23 which is a digital tuner, a video signal processing circuit 24, and an audio signal. A processing circuit 25 and a remote control receiver 26 are mounted.

  The main device 21 has a group of registers in which register set values according to the type of the liquid crystal display panel 42 are set, and the type of the liquid crystal display panel 42 is based on the register set value group set in these registers. Accordingly, the entire liquid crystal television 1 is controlled. The main device 21 includes an AD (Analog to Digital) converter 21 a and an ADC port 21 b that is a voltage input port to the AD converter 21 a.

  The SPI flash memory 22 is a type of flash memory that performs serial data transfer, and stores firmware. The firmware includes data necessary for control of the main device 21 and a program necessary for control of the main device 21, including register setting values set in a group of registers in the main device 21. More specifically, the flash memory 22 is mainly composed of a firmware application (F / W application) 22a that is a program necessary for controlling the main device 21, and a plurality of types (number of inches or liquid crystal cells) belonging to the same series. A register setting value table 22b composed of records storing panel drive power supply voltage values and register setting value groups for each of the display panels, and main data which is data necessary for starting the main device 21 Device activation data 22c is stored. The register set value table 22b is a record storing a panel drive power supply voltage value and a register set value group for each of a plurality of types of display panels belonging to the same series (different in the number of inches or liquid crystal cells). Consists of

  In general, even in the liquid crystal television 1 belonging to the same series, the value of the panel driving power supply voltage is different if the number of inches of the liquid crystal display panel 42 is different. For this reason, the panel drive power supply voltage value 51 in the register set value table 22b shown in FIG. In addition, as shown in FIG. 2, even if the panel drive power supply voltage value 51 is the same (the number of inches of the liquid crystal display panel 42 is the same), it is mainly composed of parameters related to the display of the liquid crystal display panel 42. The contents of the register set value group 56 may be different. This is because, even if the number of inches is the same (the same panel drive power supply voltage value), the contents of the register set value group 56 must be changed if the liquid crystal cell type of the liquid crystal display panel 42 is different. Therefore, a plurality of records of the same panel drive power supply voltage value may exist in the register set value table 22b. In the example of the register setting value table 22b shown in FIG. 2, even if there is only one record with the panel drive power supply voltage value 51 of 9V, the standard value (data temperature) 52 data (color temperature) 52 6200K) is stored, but when there is only one record corresponding to a certain panel drive power supply voltage value 51, it is not always necessary to store a specific value in the measured value (color temperature) 52. No (may be in a state where initial values are stored).

  The tuner 23 extracts a video signal and an audio signal of a channel selected by an instruction operation using a remote controller 7 by a user from a digital television broadcast signal received by an antenna (not shown), and extracts the extracted video signal. In addition to outputting to the video signal processing circuit 24, the extracted audio signal is output to the audio signal processing circuit 25. The video signal processing circuit 24 generates a video signal corresponding to each gradation of RGB based on the input video signal, performs various signal processing on the video signal, and drives the driving circuit 41 (driving means) of the liquid crystal display device 4. ). The audio signal processing circuit 25 performs amplification based on an instruction from the main device 21 with respect to the audio signal received from the tuner 23 and sends the amplified signal to the speaker 6. The speaker 6 converts the amplified audio signal received from the audio signal processing circuit 25 into audio and outputs it.

  The remote control receiver 26 is connected to a computer 8 used for measuring the color temperature and brightness of an image at the time of shipment of the measurement system 10 described later in addition to a signal transmitted from the remote control 7 attached to the liquid crystal television 1. A signal transmitted from the remote control transmitter 8 a is received, and data such as the received command is transmitted to the main device 21.

  On the analog PCB 3, a power supply block 32 (power supply means) that supplies power to each part of the device including the drive circuit 41 of the liquid crystal display device 4 and an inverter circuit 31 are mounted. The power supply block 32 receives supply of AC power supply voltage from an external commercial power supply, generates various voltages (mainly DC voltage) from the supplied AC power supply voltage, and supplies them to each part of the apparatus. The panel drive power supply voltage supplied from the power supply block 32 to the drive circuit 41 of the liquid crystal display panel 42 is connected to the ADC port 21b of the main device 21 via the voltage detection line DL1 in the figure. Detects the value of the panel drive power supply voltage supplied from the power supply block 32 to the drive circuit 41 via the power supply line PL2 based on the voltage input to the AD converter 21a via the ADC port 21b. The main device 21 and the voltage detection line DL1 correspond to power supply voltage detection means in the claims. The inverter circuit 31 converts the DC voltage supplied from the power supply block 32 into a high-frequency AC voltage, supplies the AC voltage to the backlight 5, and turns on the backlight 5.

  The liquid crystal display device 4 includes the drive circuit 41 and the liquid crystal display panel 42 described above. The drive circuit 41 generates a drive voltage for driving the liquid crystal display panel 42 based on the video signal received from the video signal processing circuit 24, and applies the generated drive voltage to the liquid crystal display panel 42. The liquid crystal display panel 42 displays an image based on the drive voltage output from the drive circuit 41. More specifically, the liquid crystal display panel 42 applies the drive voltage output from the drive circuit 41 to each pixel, thereby changing the transmission amount of light emitted from the backlight 5 for each pixel, thereby displaying an image. Form.

  Next, among the devices shown in FIG. 1, devices included in the measurement system 10 used for a color temperature or luminance measurement process described later will be described. The measurement system 10 includes a computer 8 and a color analyzer 9 (measuring means). Connected to the color analyzer 9 is a camera 9 a for capturing an image displayed on the liquid crystal display panel 42. The computer 8 also has a remote control transmitter 8a for transmitting various commands and data to the remote control receiver 26 on the liquid crystal television 1 side based on instructions from the computer. Data transmitted from the remote control transmitter 8a to the liquid crystal television 1 side includes a white solid image for color temperature measurement, a black solid image for luminance measurement, and data of a measurement result (color temperature or luminance) by the color analyzer 9. include.

  At the time of measuring the color temperature of the image displayed on the liquid crystal display panel 42, the computer 8 transmits a white solid image for color temperature measurement to the liquid crystal television 1 side via the remote control transmitter 8a, and the liquid crystal television 1 controls the remote control. The receiver 26 receives the white solid image and displays the white solid image on the liquid crystal display panel 42. Then, the color analyzer 9 measures (determines) the color temperature of the solid white image on the liquid crystal display panel 42 captured by the camera 9 a and sends the measured color temperature data to the computer 8. The computer 8 transmits the received color temperature data to the liquid crystal television 1 side via the remote control transmitter 8a.

  Further, when measuring the luminance of the image displayed on the liquid crystal display panel 42, the computer 8 transmits a black solid image for luminance measurement to the liquid crystal television 1 side via the remote control transmitter 8a. A black solid image is received by the receiver 26, and this black solid image is displayed on the liquid crystal display panel 42. Then, the color analyzer 9 measures (determines) the luminance of the black solid image on the liquid crystal display panel 42 captured by the camera 9 a and sends the measured luminance data to the computer 8. The computer 8 transmits the received luminance data to the liquid crystal television 1 side via the remote control transmitter 8a.

  Next, with reference to FIG. 3, the process at the time of the first activation (at the time of factory shipment) of the liquid crystal television 1 will be described. The process at the first startup of the liquid crystal television 1 is carried out by the computer 8 in the measurement system 10 in FIG. 1 constantly using a white solid image for color temperature measurement (or a black solid for luminance measurement) via the remote control transmitter 8a. Image) and color temperature (or luminance) data measured by the color analyzer 9 are transmitted to the liquid crystal television 1 side.

  When the power switch of the liquid crystal television 1 is turned on at the first startup, the power supply block 32 starts supplying power to the main device 21 and the SPI flash memory 22 via the power supply line PL1 (S1). Power supply to various peripheral devices is started (S2). When power is supplied, the main device 21 is necessary for starting up the firmware (F / W) application 22a and the main device 21 itself (in the so-called standby mode) (necessary for starting up in the so-called standby mode). ) Only the data (main device activation data 22c) is read from the SPI flash memory 22 (S3). When the main device 21 is started up, the main device 21 determines that this time is the first start-up time of the liquid crystal television 1 based on the initial start flag included in the main device start-up data 22c. Based on the voltage input to the AD converter 21a via the ADC port 21b, the value of the panel driving power supply voltage supplied from the power supply block 32 to the drive circuit 41 via the power supply line PL2 is detected (S4).

  Next, the main device 21 searches the register setting value table 22b in the SPI flash memory 22 for a record corresponding to the panel drive power supply voltage value detected in S4. Specifically, the main device 21 determines that the panel drive power supply voltage value 51 is higher or lower than the detected panel drive power supply voltage value from the records stored in the register setting value table 22b shown in FIG. Records that are within a few percent (for example, 5% above and below) are extracted. Whether or not two or more records (having a register setting value group) corresponding to the extracted (detected) panel drive power supply voltage value have been extracted (that is, the detected panel drive power supply voltage value). It is determined whether there are two or more sets of register setting values corresponding to (S5).

  As a result of the above determination, when only one record (having a register set value group) corresponding to the detected panel drive power supply voltage value is extracted (that is, the register corresponding to the detected panel drive power supply voltage value). When there is only one set value set (NO in S5), the main device 21 stores the register set value group 56 stored in the record corresponding to the panel drive power supply voltage value in the register set value table. 22b, this register set value group 56 is used to set a group of registers in the main device 21 (registers for setting parameters related to the display of the liquid crystal display panel 42, the number of input / output terminals of the liquid crystal television 1, etc.) (S6), the entire apparatus of the liquid crystal television 1 is activated (S9). In the example shown in FIG. 2, the register set value group 56 includes a luminance 53, the number of input / output terminals 54 (of the liquid crystal television 1), and the like.

  In the determination of S5, when two or more records (having a register set value group) corresponding to the detected panel drive power supply voltage value are extracted (that is, corresponding to the detected panel drive power supply voltage value). When there are two or more register set value sets to be performed) (YES in S5), the main device 21 activates the entire apparatus including the liquid crystal display device 4 to measure the color temperature input from the computer 8. A white solid image (or a black solid image for luminance measurement) is displayed on the liquid crystal display panel 42, and the color temperature (or luminance) data measured by the color analyzer 9 is transmitted to the remote control transmitter 8a and the remote control receiver 26. Via the computer 8. Then, the register setting value group 56 corresponding to the received color temperature or luminance is read from the register setting value table 22b, and the register setting value group 56 is set in a group of registers in the main device 21 (S8). Then, the entire apparatus of the liquid crystal television 1 is restarted (S9). Specifically, in the example shown in FIG. 2, since the measurement value acquired by the color analyzer 9 is the color temperature, the main device 21 stores the record stored in the register setting value table 22b shown in FIG. A record in which the color temperature 52 is closest to the color temperature measured by the color analyzer 9 is extracted, and the register set value group 56 included in the extracted record is set in a group of registers in the main device 21. Then, the entire apparatus of the liquid crystal television 1 is restarted.

  As described above, according to the liquid crystal television 1 of the present embodiment, the register setting composed of the records storing the panel driving power supply voltage value 51 and the register setting value group 56 of each of the plurality of types of liquid crystal display panels 42. A value table 22b is stored, and a register set value group 56 corresponding to the detected panel drive power supply voltage value (that is, corresponding to each inch of the liquid crystal display panel 42) is stored in the register The register setting value group 56 is read from the setting value table 22 b and set in a group of registers in the main device 21. This eliminates the need to store firmware including different register set value groups for each type of liquid crystal display panel 42, so even when there are variations in the number of inches of the liquid crystal display panel 42 in the same series of liquid crystal televisions 1. The entire firmware including the register set value group (corresponding to the F / W application 22a, the register set value table 22b, and the main device activation data 22c in FIG. 1) can be easily shared for each series. Further, as described above, since it becomes easy to share the entire firmware for each series, the digital PCB 2 on which the SPI flash memory 22 for storing the firmware and the main device 21 are mounted is provided for each series of the liquid crystal television 1. It becomes easy to share.

  Further, for example, in two or more liquid crystal televisions 1 in which the series and the liquid crystal display panel 42 have the same number of inches and the same panel drive power supply voltage value, the types of liquid crystal cells in these liquid crystal televisions 1 are different. Even in this case, the color temperature or luminance of the image actually displayed on the liquid crystal display panel 42 is measured, and a register set value group corresponding to the measured color temperature or luminance is set in a group of registers in the main device 21. be able to. Here, in general, when the types of liquid crystal cells are different, the color temperature and luminance of the image displayed on the liquid crystal display panel 42 are different, so that the actual display is performed on the liquid crystal display panel 42 as described above. By setting a register set value group corresponding to the color temperature or luminance of the image in the above register, the main device 21 controls the entire apparatus of the liquid crystal television 1 according to the type of the liquid crystal cell of the liquid crystal display panel 42. It can be carried out. Even if the series and the number of inches of the liquid crystal display panel 42 are the same, if the liquid crystal cell type of the liquid crystal display panel 42 is different, the value of the panel driving power supply voltage may be different. In this case, even if there are two or more types of liquid crystal display panels 42 having the same number of inches and different types of liquid crystal cells, the group in the main device 21 is based on the measurement result of the color temperature or luminance. It is not necessary to determine a register set value group to be set in the register of the register, and as described above, a register set value group to be set in a group of registers in the main device 21 based only on the detected panel drive power supply voltage value. May be determined.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, when there are two or more types of liquid crystal display panels in which the series and the number of inches of the liquid crystal display panel 42 are the same (and the value of the power voltage for driving the panel is the same) and the types of liquid crystal cells are different, In two or more liquid crystal televisions 1, when the types of liquid crystal cells in these liquid crystal televisions 1 are different from each other, the main result is not based on the measurement result of the color temperature or the brightness as in the above embodiments, but based on the other measurement results. A register set value group to be set in a group of registers in the device 21 may be determined. Further, different types of signals are transmitted from the liquid crystal display device to the main device according to the type of the liquid crystal cell, so that the main device 21 determines the value of the panel drive power supply voltage and the signal transmitted from the liquid crystal display device. A register set value group to be set in a group of registers in the main device may be determined based on the type. Furthermore, the television receiver to which the present invention is applied is not limited to a liquid crystal television, and may be a plasma television receiver (plasma television).

1 LCD TV (TV receiver)
5 Backlight 9 Color analyzer (measuring means)
21 Main device (control means, power supply voltage detection means)
22 SPI flash memory (storage means)
22a F / W application (program required for control of control means)
22b Register set value table (part of [data required for control means control])
22c Main device activation data (part of [data necessary for control means control])
23 Tuner 32 Power supply block (Power supply means)
41 Drive circuit (drive means)
DL1 voltage detection line (power supply voltage detection means)

Claims (3)

A backlight as a light source;
A tuner for extracting a video signal and an audio signal from a television broadcast signal received by an antenna;
Driving means for generating a driving voltage based on the video signal extracted by the tuner and outputting the generated driving voltage;
A display panel for displaying an image based on the driving voltage output from the driving means;
It has a group of registers in which register setting values according to the type of the display panel are set, and based on the register setting value group set in these registers, the entire device is controlled according to the type of the display panel. Control means to perform;
Storage means for storing firmware including data necessary for control of the control means including a register set value group to be set in the group of registers and a program necessary for control of the control means;
In a television receiver comprising power supply means for supplying power to each part of the apparatus including the drive means,
A power supply voltage detection means for detecting a value of a panel drive power supply voltage supplied from the power supply means to the drive means;
The storage means further stores a register setting value table composed of records each storing a value of the panel driving power supply voltage and the register setting value group for each of a plurality of types of display panels.
The control means reads the register setting value group corresponding to the value of the panel driving power supply voltage detected by the power supply voltage detecting means at the first startup of the apparatus from the register setting value table, and this register setting value group A television receiver, wherein the entire apparatus is activated or restarted after setting the group of registers in the group. Connected to measuring means for measuring the color temperature or luminance of the image displayed on the display panel;
Each record of the register setting value table includes color temperature or luminance of an image corresponding to each of the plurality of types of display panels,
The control means includes
When the register setting value group corresponding to the value of the panel driving power supply voltage detected by the power supply voltage detecting means is read from the register setting value table when the apparatus is started for the first time, it is stored in the register setting value table. If there are two or more records having the register setting value group corresponding to the value of the panel drive power supply voltage detected by the power supply voltage detection means,
The register setting value group corresponding to the color temperature or luminance measured by the measuring means is read from the register setting value table, and this register setting value group is set in the group of registers. The television receiver according to claim 1, wherein the television receiver is activated.   The television receiver according to claim 1, wherein the display panel is a liquid crystal display panel.

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