TW201729177A - Display device, display device correction method, display device manufacturing method, and display device display method - Google Patents

Abstract

A method of correcting a display device including pixels which are arranged in a matrix and have light-emitting elements that emit light according to a luminance signal is provided. The method includes: obtaining in advance first correction data which includes correction data components each corresponding to a different one of the pixels and is for correcting the luminance signal; transforming the first correction data into second correction data by (i) reconfiguring the correction data components by propagating an error component of each of the correction data components to surrounding pixels of a corresponding one of the pixels and (ii) performing bit reduction on the correction data components that have been reconfigured; and correcting the luminance signal using the second correction data.

Description

Display device, method for correcting display device, method for manufacturing display device, and display method for display device

The present disclosure relates to a display device, a method of correcting the display device, a method of manufacturing the display device, and a display method of the display device.

Regarding a display device using a current-driven light-emitting element, an organic EL display is known. The organic EL display is attracting attention because of its excellent viewing angle characteristics and low power consumption.

In an organic EL display, an organic EL element constituting a pixel is usually arranged in a matrix. In particular, since the active matrix type organic EL display can cause the organic EL element to emit light until the next scanning (selection) is reached, even if the duty ratio is increased, the display brightness is not reduced. Therefore, since it can be driven at a low voltage, it is possible to reduce power consumption. However, the active matrix type organic EL display has the following disadvantages: even if the same luminance signal is given due to the difference in characteristics of the driving transistor and the organic EL element, the luminance of the organic EL element in each pixel is different, that is, The so-called brightness unevenness occurs.

Regarding the correction method of the brightness unevenness of the conventional organic EL display, a method has been proposed in which the correction signal stored in the memory is used to correct the luminance signal, thereby compensating for the inconsistency of the characteristics of each pixel.

For example, Patent Document 1 discloses a method of manufacturing an organic EL display device in which a display panel having a plurality of pixels (a plurality of pixels including an organic EL element and a driving transistor) is obtained, and representative current-voltage characteristics are obtained. The luminance-current characteristics of the divided regions and the luminance-voltage characteristics of the respective pixels are obtained for each pixel, and the current-voltage characteristics of the respective pixels obtained by these are obtained as correction data representing the current-voltage characteristics. According to this, since the correction data with high precision is obtained, the luminance unevenness in the surface of the display panel can be improved, and the variation in luminance degradation due to the lifetime can be suppressed. Advanced technical literature

Patent Document Patent Document 1: International Publication No. 2011/118124

Disclosure of the Invention Problems to be Solved by the Invention However, in the organic EL display device disclosed in Patent Document 1, the correction data (gain and offset) which are calculated in advance by pixels are stored in the memory of the control circuit. Therefore, if the resolution of the display panel is improved while ensuring high-precision correction data, the amount of correction data will be enlarged, and the data transmission rate such as the luminance signal will be compressed. In particular, the above-mentioned problems are serious for tablet terminals that require small and high-definition.

The present invention has been made in view of the above problems, and an object thereof is to provide a display device capable of reducing a corrected data capacity and a transmission rate while ensuring accuracy of correction, a method of correcting a display device, a method of manufacturing a display device, and a display method of a display device . Means to solve the problem

In order to solve the above problems, a method for correcting a display device according to an aspect of the present invention is a method for correcting a display device for correcting brightness unevenness of a display device, and the display device is configured to emit a light-emitting element that emits light in response to a luminance signal. The pixel device is arranged in a matrix shape, and the method for correcting the display device includes the step of acquiring, acquiring, in advance, a plurality of correction data components corresponding to the pixels, and a first correction data for correcting the luminance signal; and a conversion step, For the first correction data, the error component of the correction data component corresponding to each pixel is propagated to the peripheral pixels of each pixel, and the correction data component of each of the reconstructed pixels is subjected to bit reduction. In the second correction data conversion; and the correction step, the brightness information is corrected by using the second correction data.

Further, a method of manufacturing a display device according to an aspect of the present invention is a method of manufacturing a display device in which pixels of a light-emitting element that emits light in response to a luminance signal are arranged in a matrix, and includes a display panel forming step. Forming a display panel in which a plurality of the pixels are arranged; obtaining a step of acquiring a first correction data for correcting the luminance signal by a plurality of correction data components corresponding to the pixels, and a conversion step for the first correction data The error component of the corrected data component corresponding to each pixel is propagated to the peripheral pixels of the respective pixels to be reconstructed, and the corrected data component of each of the reconstructed pixels is subjected to bit reduction, thereby the second corrected data And a saving step of storing the second correction data in a memory of the display device after the converting step.

Further, a display method of a display device according to an aspect of the present invention is a display method for a display device having pixels arranged to emit light in response to a luminance signal, and is characterized in that it includes a correction step and uses Correcting the luminance signal by acquiring the second correction data obtained by the step and the conversion step, wherein the obtaining step is to acquire, in advance, a first correction data for correcting the luminance signal, which is composed of a plurality of correction data components corresponding to the pixels, and In the conversion step, the error component of the corrected data component corresponding to each pixel is propagated to the peripheral pixels of each pixel and reconstructed, and the corrected data component of each of the reconstructed pixels is subjected to the first correction data. Converting the second correction data to the second correction data; and displaying the step of supplying the luminance signal corrected by the correction step to the pixel, and causing the light-emitting element to emit light according to the luminance signal, thereby causing the display device Display.

Further, a display device according to an aspect of the present invention is a display device in which pixels having light-emitting elements that emit light in response to a luminance signal are arranged in a matrix, and has a conversion portion for a plurality of pixels corresponding to the pixels The correction data component is configured to correct the first correction data of the brightness signal, and the error component of the correction data component corresponding to each pixel is propagated to the peripheral pixels of each pixel to be reconstructed, and each of the reconstructed components is reconstructed The pixel correction data component is subjected to bit reduction to convert the second correction data, and the correction unit corrects the luminance signal by using the second correction data. Effect of the invention

According to the display device, the display device correction method, the display device manufacturing method, or the display device display method according to the present invention, the error correction component of the correction data component is transmitted to the peripheral pixels and the bit-reduced correction data is used. Correcting the brightness signal, it is possible to reduce the corrected data capacity and transmission rate while ensuring the accuracy of the correction.

Embodiments for Carrying Out the Invention Hereinafter, embodiments of a display device and a method of correcting the same will be described using the drawings. Incidentally, the embodiments described below are all preferred embodiments of the present disclosure. Therefore, the numerical values, the shapes, the materials, the constituent elements, the arrangement positions of the constituent elements, the connection form, the order of the engineering, and the engineering, which are shown in the following embodiments, are merely examples, and the present invention is not intended to limit the invention. Therefore, among the constituent elements of the following embodiments, the constituent elements of the independent request items that are not described in the most general concept of the present invention are described as arbitrary constituent elements.

Incidentally, each drawing is a schematic view, not all of which are strictly illustrated. In the drawings, the same components are denoted by the same reference numerals, and the description thereof will be omitted or simplified.

(Embodiment 1) [1.1 Configuration of Display Device] Fig. 1 is a block diagram showing a configuration of a display device 1 according to the first embodiment. The display device 1 in the figure has a control unit 10, a data line drive circuit 20, a scanning line drive circuit 30, and a display unit 40. The control unit 10 has a memory 11 . Incidentally, the memory 11 may be disposed outside the control unit 10 in the display device 1.

The control unit 10 controls the memory 11, the data line drive circuit 20, and the scanning line drive circuit 30. For the memory 11, for example, when the manufacturing process of the display device 1 is completed, the corrected correction data (the second correction data to be described later) is stored.

The control unit 10 reads the second correction data written in the memory 11 during the display operation, and corrects the video signal (luminance signal) input from the outside based on the second correction data to the data line drive circuit 20. Output.

In addition, when the correction data (the first correction data to be described later) is generated in the manufacturing process, for example, the control unit 10 communicates with an external information processing device, for example, The data line driving circuit 20 and the scanning line driving circuit 30 are driven in accordance with an instruction from the information processing device.

In addition, the control unit 10 performs conversion processing on the correction data (first correction data) before the processing in the manufacturing process, and generates the corrected correction data (second correction data), and the corrected data after the processing. Stored in memory 11.

The display unit 40 has a plurality of pixels 400 arranged in a matrix, and displays an image based on an image signal (brightness signal) input from the outside to the display device 1.

Fig. 2 is a view showing an example of a circuit configuration of a pixel 400 according to the first embodiment and a connection to a peripheral circuit. The pixel 400 in the figure has a scanning line 412, a data line 411, a power supply line 421, a selection transistor 403, a driving transistor 402, an organic EL element 401, a storage capacitor element 404, and a common electrode 422. Further, the peripheral circuit has a data line drive circuit 20 and a scan line drive circuit 30.

The scan line driver circuit 30 is connected to the scan line 412 to control the conduction and non-conduction of the select transistor 403 of the pixel 400.

The data line drive circuit 20 is connected to the data line 411 and has a function of outputting a data voltage (a luminance signal corrected using the second correction data) to determine a signal current flowing to the drive transistor 402.

The transistor 403 is selected such that the gate terminal is connected to the scan line 412, and the time point at which the data voltage of the data line 411 is supplied toward the gate terminal of the driving transistor 402 is controlled.

The driving transistor 402 connects the gate terminal to the data line 411 through the selection transistor 403, connects the source terminal to the anode terminal of the organic EL element 401, and connects the anode terminal to the power source line 421. Thereby, the driving transistor 402 converts the data voltage supplied to the gate terminal into a signal current corresponding to the data voltage, and supplies the converted signal current to the organic EL element 401.

The organic EL element 401 is used as a light-emitting element, and the cathode terminal of the organic EL element 401 is connected to the common electrode 422.

The storage capacitor element 404 is connected between the power supply line 421 and the gate terminal of the drive transistor 402. The storage capacitor element 404 is, for example, such that the gate voltage remains as it is after the selection transistor 403 is turned off, and the drive current can be continuously supplied from the drive transistor 402 to the organic EL element 401.

Incidentally, although not shown in FIGS. 1 and 2, the power supply line 421 is connected to a power source. In addition, the common electrode 422 is also connected to a power source.

The data voltage supplied from the data line driving circuit 20 is applied to the gate terminal of the driving transistor 402 through the selection transistor 403. The driving transistor 402 is such that a current corresponding to the data voltage flows between the source-electrode terminals. This current flows to the organic EL element 401, whereby the organic EL element 401 emits light with the light emission luminance corresponding to the current.

Incidentally, regarding the circuit configuration of the pixel 400 shown in FIG. 2, another circuit element, wiring, or the like may be inserted between the paths connecting the circuit elements.

[1.2 Configuration of Control Unit] FIG. 3 is a block diagram showing a configuration of the control unit 10 included in the display device 1 according to the first embodiment. The control unit 10 shown in the figure has a memory 11, a conversion unit 12, and a correction unit 13.

The conversion unit 12 is for the correction data (first correction data) before the processing of the correction data component divided by the pixels, and causes the error component generated when the correction data component corresponding to each pixel is quantized to propagate to the peripheral pixels of the respective pixels. Further, the reconstructed data component of each of the reconstructed pixels is converted into the second corrected data that has been bit-reduced.

The correction unit 13 corrects the luminance signal using the second correction data. The luminance signal is an electrical signal applied to the pixel to cause the light-emitting element of the pixel to emit light. More specifically, in the present embodiment, the luminance signal is a data voltage applied from the data line driving circuit 20 to the gate of the driving transistor 402 in order to cause the organic EL element 401 of the pixel 400 to emit light.

Here, the correction data (first correction data) before processing will be described. The first correction data is, for example, information for reducing luminance unevenness when each pixel 400 of the display unit 40 emits light based on an image signal transmitted from the outside to the display device 1. More specifically, the correction data is configured by, for example, two correction parameters such as a gain correction value and an offset correction value corresponding to the pixel 400. Incidentally, the correction data may not correspond to the pixel 400, and may correspond to a pixel group (an aggregate of a plurality of adjacent pixels).

4 is a block diagram showing the configuration of a control unit 500 included in a conventional display device. The control unit 500 shown in the figure has a memory 512 and a luminance signal correction unit 531. In the conventional display device, the control unit 500 stores the first correction data in the memory 512 in advance. Further, the control unit 500 converts the video signal to generate a luminance signal (pre-corrected luminance signal) divided by pixels. The luminance signal correction unit 531 reads the first correction data from the memory 512, multiplies (or is) the gain correction value of the first correction data by the pre-correction luminance signal, and adds (or subtracts) the first correction data. The offset correction value is used to correct the pre-correction luminance signal. The control unit 500 outputs the corrected luminance signal thus obtained to the data line driving circuit at a predetermined time point. Thereby, the brightness unevenness of the display portion is lowered.

In the conventional display device described above, as the resolution of the display unit is increased, the amount of correction data stored in the memory 512 is increased, and the data transmission rate such as the luminance signal is increased and compressed. In particular, in a tablet terminal device that requires a small size and high definition, it is difficult to secure a large-capacity memory and an increase in cost.

In contrast, the display device 1 according to the present embodiment does not correct the luminance signal by the first correction data (correction data before processing), but by correcting the data before processing (the first correction data). The corrected correction data (second correction data) obtained by the lightweight processing is corrected to correct the luminance signal. In the display device 1 according to the present embodiment, a configuration for generating the second correction data from the first correction material will be described below.

The conversion unit 12 includes a threshold value determination unit 121 and a bit reduction unit 122, and causes error components of the correction data components of the pixels constituting the first correction data to propagate to the peripheral pixels of the respective pixels to form pixels of the first correction data. The correction data component is reconstructed, and the corrected data component of the reconstructed first correction data is bit-reduced and converted to the second correction data.

The threshold determination unit 121 determines a threshold value to be used when the subsequent bit reduction unit 122 performs bit reduction based on the distribution of the plurality of correction data components constituting the first correction data.

The bit reduction unit 122 quantizes the correction data component of each pixel constituting the first correction data based on the threshold value determined by the threshold determination unit 121, and causes the error component at this time to propagate to the peripheral pixels of each pixel to form the first component. The correction data component of each pixel of the correction data is reconstructed, and the second correction data is generated by performing bit reduction on the corrected data component of the reconstructed first correction data. More specifically, the bit reduction unit 122 reduces the number of bits of the corrected data component of each pixel constituting the first correction data to be smaller than the number of bits of the correction data component based on the threshold value. Correct the data component.

Incidentally, the bit reduction unit 122 may perform binarization ("0" or "1") on the corrected data component of the first modified data that has been reconstructed based on the threshold determined by the threshold determination unit 121. In this case, it will be possible to make the revised data the lightest.

For example, the quantization method for reconstructing the error component of the correction data component of each pixel constituting the first correction data to the peripheral pixels of each pixel and reconstructing the correction data component of each pixel constituting the first correction data is, for example, Use the error diffusion method. Others may be used as the above-described method by using a dithering method such as a random vibration method or a pattern wobbling method. By using the error diffusion method as the processing of the bit reduction unit 122, the correction accuracy of the luminance signal can be ensured.

The memory 11 stores the second correction data generated by the conversion unit 12 converting the first correction data. Since the second correction data is obtained by reducing the first correction data by the bit, the capacity is small compared with the first correction data. As the resolution of the display unit 40 increases, the effect of reducing the capacity of the memory 11 storing the second correction data that is reduced by the conversion unit 12 can be remarkable. From the viewpoint that the recording medium does not require excessive capacity and long life, the memory 11 may be an invariant memory using, for example, a flash memory.

The correction unit 13 includes a data expansion unit 132 and a luminance signal correction unit 131.

The data expansion unit 132 is configured by, for example, a volatile first memory and an arithmetic circuit such as a DRAM. The data expansion unit 132 reads the second correction data from the memory 11 and temporarily stores it in the first memory. Here, the second memory in which the SRAM is provided in the first memory (or the outside) is stored in at least one of the threshold data determined by the threshold determining unit 121 and the quantized value of the first corrected data. By. The calculation circuit may be at least one of the threshold data stored in the second memory and the discrete value, and the second correction data secured by the first memory may have the second correction data stored in the memory 11 The correction data (discrete value) of the number of bits with the larger number of bits is expanded. In other words, the correction unit 13 expands the second correction data to a higher level than the second correction data by using at least one of the threshold data and the discrete value, and performs bit compression on the first correction data. Correct the data and correct the brightness signal. Incidentally, in the control unit 10 according to the present embodiment, the material expansion unit 132 is not an essential component.

However, if the bit reduction rate of the first correction data in the bit reduction unit 122 is higher, the correction accuracy of the second correction data is lowered. Therefore, when the bit reduction rate is high, the data expansion unit should be provided. 132.

The luminance signal correcting unit 131 corrects the luminance signal corresponding to the pixel 400 by using the second corrected data that has been developed by the data expansion unit 132. Hereinafter, an example of the correction processing of the luminance signal performed by the luminance signal correcting unit 131 will be described.

The luminance signal correcting unit 131 multiplies (or is) the gain correction value in the second correction data (gain correction value, offset correction value) by the data voltage corresponding to the pre-correction luminance signal, and adds the multiplication value to the multiplication value. The offset correction value is (or subtracted) and output to the data line drive circuit 20. Thereby, the correction data capacity and the transmission rate can be reduced while ensuring the accuracy of the brightness correction.

Here, the specific processing of the conversion unit 12 will be described in detail using FIG. 5.

Fig. 5 is a view showing a comparison process between the display device 1 according to the first embodiment and a conventional display device, and a result thereof. The display image shown on the left side of the figure is an example of an image in which the display unit is displayed with the uncorrected luminance signal when the entire display unit is illuminated with the same brightness. In contrast, the display image shown in the upper right portion of FIG. 5 is an image in which the display portion is displayed by the corrected luminance signal, and the corrected luminance signal is displayed by the present embodiment. The control unit 10 of the device 1 performs processing to correct the luminance signal. Further, the display image shown in the lower right portion of FIG. 5 is an image in which the display unit is displayed by the corrected luminance signal, and the corrected luminance signal is processed by the control unit 500 of the conventional display device. And the corrected brightness signal.

Further, the display image caused by the display device 1 according to the present embodiment in FIG. 5 is an image corrected using the second correction data, and the second correction data is the error diffusion processing and the bit unit by the conversion unit 12. Generated by reducing processing. The first correction data shown in FIG. 5 is an example in which the gain correction values (correction data components) divided by pixels are expressed in a matrix. The display device 1 according to the present embodiment performs error diffusion on the first correction data. Hereinafter, the correction data in the error diffusion shown in FIG. 5 will be used. Incidentally, for convenience of explanation, in Fig. 5, the correction data in the error diffusion is represented by a 4 × 4 correction data component, and the correction data component is expressed by (column, row). For example, the upper left correction data component is (1, 1) and the lower right correction data component is represented by (4, 4).

First, as the previous stage of the error diffusion processing, the threshold determination unit 121 determines the threshold (=1.012), the lower cut value (=0.893), and the upper cut value (=1.130) from the distribution state of each corrected data component of the first correction data. ). Here, the lower cut value and the upper cut value are respectively discrete values after the first corrected data (the corrected data component) is quantized.

Next, the bit reduction unit 122 compares the corrected data component (1, 1) of the first correction data with the threshold (0.999 < 1.012), and the corrected data component (1, 1) subjected to the error diffusion processing is The above-mentioned discrete value is replaced by the intercept value (0.893). Then, the binarized data of the corrected data component (1, 1) is made "0", whereby the corrected data component (1, 1) is quantified. Next, the difference between the pre-processing data (0.999) of the data component (1, 1) and the processed data (0.893) (error component) (0.106) is assigned by a predetermined weighting (0.046=0.106×7/). 16) The bit reduction unit 122 compares the value (1.052=1.0058+0.046) of the corrected data component (1, 2) of the first correction data with the threshold value (1.052>1.012). As a result, the corrected data component (1, 2) subjected to the error diffusion processing is replaced by the intercept value (1.130) above the discrete value. Then, the binarized data of the corrected data component (1, 2) is made "1", thereby quantifying the corrected data component (1, 2). Next, the difference between the pre-processing data (1.0058) and the processed data (1.130) of the corrected data component (1, 2) (-0.124) is assigned by the predetermined weighted distribution (-0.054=-0.124×7/16). The bit reduction unit 122 compares the value (0.9714) of the corrected data component (1, 3) of the first correction data with the threshold value (0.9714 < 1.012). As a result, the corrected data component (1, 3) after the error diffusion processing is replaced by the intercept value (0.893) below the discrete value, so that the binarized data becomes "0", thereby correcting the data. The composition (1, 3) was quantified. Hereinafter, the correction data in the error diffusion of FIG. 5 indicates that the correction data component (1, 2) is diffused to the correction data components (2, 1), (2, 2), (2, 3) of the peripheral pixels. data. Hereinafter, the error diffusion processing is performed on all the corrected data components in the same manner, whereby the second correction data binarized (quantized) as shown in FIG. 5 is generated. Incidentally, in the correction data in the error diffusion processing of FIG. 5, the corrected data components (1, 4), (2, 4), and (3, 1) to (4, 4) are values before the diffusion processing. .

The bit reduction unit 122 performs error diffusion processing as described above, thereby correcting the data components (1, 1) to (4, 4) of the pixels constituting the first correction data based on the threshold determined by the threshold determination unit 121. The quantization is performed so that the error component at this time propagates to the peripheral pixels of the respective pixels, and the corrected data component of each pixel constituting the first correction data is reconstructed, and the corrected data component of the first modified data that has been reconstructed is bit-positioned. The second correction is generated by the yuan reduction. In the above example, the bit reduction unit 122 performs bit reduction on the correction data component of each pixel constituting the first correction data by binarization based on the threshold value.

Next, the data expansion unit 132 reads the binarized (quantized) second correction data and temporarily stores it in the first memory, and uses the threshold (=1.012), the lower cut value (=0.893), and the upper cut value (=1.130). And the second correction data is expanded to the correction data (discrete value) having the number of bits larger than the number of bits of the second correction data. More specifically, as shown in the second correction data (after expansion) of FIG. 5, the data expansion unit 132 uses the threshold (=1.012) and the lower cut value (=0.893) to set the second corrected data component (1, 1). ) The "0" is truncated (=0.893) to expand. Further, the threshold value (=1.012) and the upper cut value (=1.130) are used to expand the "1" of the second corrected data component (1, 2) upward (=1.130).

Incidentally, in the present embodiment, the second correction data is reduced to one bit ("0" or "1") by the bit, but the present invention is not limited thereto. When the second correction data is reduced to two or more bits by the bit, the data expansion unit 132 may be any one of the discrete values obtained by using only the threshold data or the corrected data component of the first correction data. The correction data (discrete value) of the number of bits larger than the number of bits of the second correction data is expanded.

For example, when the second correction data is 3 bits, the threshold values are 0.910, 0.944, 0.978, 1.012, 1.045, 1.079, and 1.113, and the first correction data is quantized by discrete values (with 2 bits). In the case where the intercepted value and the lower intercepted value correspond to) are 0.893 ("0"), 0.927 ("1"), 0.961 ("2"), 0.995 ("3"), 1.028 ("4"), 1.062 ( "5"), 1.096 ("6"), 1.130 ("7"). In this case, the data expansion unit 132 temporarily stores the correction data components of the second correction data quantized to "0" to "7" and temporarily stores them in the first memory, and can use only the above seven thresholds. Each of the correction data components of the second correction data is developed to a correction data component (discrete value) having a larger number of bits (four or more bits) than the number of bits of the second correction data. For example, when the corrected data component (1, 1) of the second correction data is "2", the expanded correction data component (1, 1) is determined as a discrete value between a threshold value of 0.944 and a threshold value of 0.978. Calculate 0.961 ("2"). In addition, when the corrected data component (1, 2) of the second correction data is "0", the expanded correction data component (1, 2) is a discrete value smaller than the threshold value 0.910, by 0.910-( 0.944-0.910)/2 (one half of the threshold interval is subtracted from 0.910), and 0.893 ("0") is calculated.

Further, the data expansion unit 132 temporarily stores the correction data components of the second correction data quantized to "0" to "7" and temporarily stores them in the first memory, and can use only the above seven discrete values. (2) The correction data component of the correction data is developed to a corrected data component (discrete value) having a larger number of bits (four or more bits) than the number of bits of the second correction data. For example, when the correction data component (1, 1) of the second correction data is "1", the calculated correction data component (1, 1) is calculated to be 0.927 ("1") of the second largest. In addition, when the correction data component (1, 2) of the second correction data is "5", the calculated correction data component (1, 2) is calculated to be the sixth largest 1.062 ("5").

Further, the data expansion unit 132 temporarily stores the correction data components of the second correction data quantized to "0" to "7" and temporarily stores them in the first memory, and can use only the maximum of the above seven discrete values. And the minimum value, and the correction data component of the second correction data is developed to the correction data (discrete value) having the number of bits (four or more bits) larger than the number of bits of the second correction data. For example, the seven discrete values may be calculated using the maximum value and the minimum value and the number of bits (3 bits) of the second correction data. By way of example, when the correction data component (1, 1) of the second correction data is "1", the calculated correction data component (1, 1) is calculated to be the second largest 0.927 ("1"). ). In addition, when the correction data component (1, 2) of the second correction data is "5", the calculated correction data component (1, 2) is calculated to be the sixth largest 1.062 ("5"). Incidentally, when the above-described seven discrete values are calculated using the maximum value and the minimum value and the number of bits of the second correction data (three bits), seven discrete values may be calculated by equal intervals. It is also possible to use an array or a random array to which weighting has been applied.

As can be seen from FIG. 5, the display image displayed by the control unit 10 of the present embodiment and the luminance signal corrected by the conventional control unit 500 are compared with the display image caused by the uncorrected luminance signal. The display image displayed causes the brightness unevenness to be greatly reduced. However, the display image caused by the control unit 10 of the present embodiment is different from the number of bits of the correction data of the display image caused by the conventional control unit 500. In other words, the data capacity of the second correction data subjected to the bit reduction by the control unit 10 of the present embodiment is relatively small as compared with the first correction data used by the conventional control unit 500. Therefore, according to the display device 1 of the present embodiment, even if the number of pixels of the display portion is increased, the correction data capacity and the transmission rate can be reduced while ensuring the accuracy of the brightness correction.

Incidentally, in the display device 1 according to the present embodiment, the conversion unit 12 and the correction unit 13 can be realized by an IC which is an integrated circuit, and can be realized by, for example, LSI (Large Scale Integration). In addition, the method of integrating the circuit can be realized by a dedicated circuit or a general-purpose processor. It is also possible to use a programmable FPGA (Field Programmable Gate Array) after the LSI is manufactured, and a reconfigurable processor that can reconfigure the connection or setting of circuit cells inside the LSI. Furthermore, if an integrated circuit circuit technology that replaces LSI is used due to advancement or derivation of semiconductor technology, it is naturally also possible to use this technology to integrate the functional blocks. Further, the conversion unit 12 and the correction unit 13 may be implemented by a program for causing the above-described encoding processing and decoding processing, or a non-transitory recording medium readable by a computer on which the program is recorded, such as a floppy disk or a hard disk. It is realized by CD-ROM, MO, DVD, DVD-ROM, DVD-RAM, BD (Blu-ray (registered trademark) Disc), and semiconductor memory. Moreover, such a program can be distributed through a recording medium such as a CD-ROM or a transmission medium such as the Internet.

[1.3 Method of Correcting Display Device] Next, a method of correcting the display device 1 according to the present embodiment will be described.

Fig. 6 is a flowchart showing the operation of the method of correcting the display device 1 according to the first embodiment. The process shown in Fig. 6 is such that the control unit 10 included in the display device 1 corrects the luminance signal by the second correction data. Hereinafter, the correction project will be gradually explained in accordance with FIG.

First, the control unit 10 acquires the first correction data (correction data before processing) for correcting the luminance signal in advance (S10: acquisition step), and the luminance signal is a signal for causing the organic EL element 401 to emit light at a predetermined luminance. . As described above, the first correction data (correction data before processing) is configured by, for example, two correction parameters such as a gain correction value and an offset correction value corresponding to the pixel 400.

Here, a method of obtaining the first correction parameter is exemplified.

Fig. 7 is a block diagram of a measurement system for acquiring first correction data. The measurement system shown in the figure has an information processing device 2, an imaging device 3, a display unit 40, and a control unit 10.

The information processing device 2 includes an arithmetic unit 201, a storage unit 202, and a communication unit 203, and has a function of controlling the process until the first correction parameter is generated. Regarding the information processing device 2, for example, a personal computer is used.

The imaging device 3 captures the display unit 40 by the control signal from the communication unit 203, and outputs the captured image data to the communication unit 203. Regarding the imaging device 3, for example, a CCD camera or a luminance meter is used.

The information processing device 2 outputs the control signal to the control unit 10 and the imaging device 3 of the display device 1 via the communication unit 203, and acquires the measurement data from the control unit 10 and the imaging device 3, and stores the measurement data in the storage unit 202. The calculation unit 201 performs calculation based on the stored measurement data, and calculates various characteristic values and parameters. Incidentally, as the control unit 10, a control circuit not included in the display device 1 may be used.

Specifically, the information processing device 2 performs control of the voltage value given to the measurement pixel. The control unit 10 applies the above voltage value to the measurement pixel to cause the measurement pixel to emit light. The photographing device 3 measures the luminance value of the illuminating measurement pixel. The information processing device 2 receives the voltage value and the measured brightness value. The information processing device 2 performs the same control for changing the voltage value given to the measurement pixel, and receives the measured luminance value with respect to the different voltage value and the voltage value. The information processing device 2 repeats this, whereby the calculation unit 201 calculates a voltage-luminance characteristic divided by the measurement pixel, compares the voltage-luminance characteristic with the reference voltage-luminance characteristic, and calculates the pixel by measurement. Correct the parameters (gain correction value and offset correction value).

The control unit 10 receives the correction parameter calculated by the calculation unit 201 via the communication unit 203, and uses it as the first correction data.

With the above construction, the control unit 10 acquires the first correction data for correcting the luminance signal in advance.

Next, the control unit 10 quantizes the corrected data component corresponding to each pixel with respect to the first correction data, and causes the error component at this time to propagate to the peripheral pixels of the respective pixels to be reconstructed (S20).

Next, the control unit 10 performs bit reduction on the corrected data component of each of the reconstructed pixels, thereby converting the second corrected data (S30). Steps S20 and S30 are conversion steps performed by the conversion unit 12 of the control unit 10.

Next, the control unit 10 stores the second correction data in the memory 11 of the display device 1 in advance (S40: storage step).

Next, the control unit 10 reads the second correction data from the memory 11, and uses the threshold value which is regarded as the reference value of the bit reduction in step S30, and the bit which is larger than the number of bits of the second correction data. The revised data of the number is expanded (S50).

Incidentally, the above-described expansion processing in step S50 is not an essential project. However, since the correction accuracy of the second correction data is lowered as the bit reduction rate of the first correction data in step S30 is higher, the expansion processing is preferably performed when the bit reduction rate is high.

Next, the control unit 10 corrects the luminance signal using the second correction data (S60: correction step).

According to the above-described correction method of the display device 1 according to the present embodiment, the luminance signal is not corrected by the first correction data (correction data before processing), but the processing of the above steps S20 and S30 is performed. 2 Correct the data to correct the brightness signal. Further, the memory 11 stores the second correction data generated after the first correction data is converted. Since the second correction data is data obtained by bit-reducing the first correction data, the capacity is smaller than the first correction data. As a result, as the resolution of the display unit 40 increases, the effect of reducing the capacity of the memory 11 storing the second corrected data of the weight reduction becomes remarkable. Therefore, it is possible to reduce the correction data capacity and the transmission rate while ensuring the accuracy of the brightness correction.

Incidentally, in step S20, the error diffusion method may be used as a method of reconstructing the correction data component corresponding to each pixel for the first correction data order to the peripheral pixels of the respective pixels. By using the error diffusion method, the correction accuracy of the luminance signal can be ensured. Incidentally, in addition to the error diffusion method, for example, a chattering method represented by a random flutter method, a pattern wobbling method, or the like may be used.

In addition, when the error component of the correction data component corresponding to each pixel in the first correction data order is propagated to the peripheral pixels of the respective pixels, the distribution state of the correction data component constituting the first correction data may be based on the distribution state of the correction data component constituting the first correction data. The corrected threshold is used to quantify the corrected data component, and the corrected data component is reconstructed by the error component at this time.

Further, in step S30, bit reduction may be performed by binarizing the corrected data component of each pixel, and the corrected data component of each pixel is a corrected data component corresponding to each pixel for the first correction data command. The error component is a modified data component of each pixel that is propagated to the peripheral pixels of each pixel. In this case, it is possible to minimize the weight of the second correction data.

(Second Embodiment) The first embodiment is a method of correcting the display device 1 in which the first correction data is acquired, the second correction data is generated from the first correction data, and the luminance signal is corrected by the second correction data. In contrast, the present embodiment describes a method of manufacturing the display device 1 in which the second correction data is generated from the first correction data and the second correction data is stored in the memory 11 of the display device 1. In other words, the method of correcting the display device 1 according to the first embodiment includes the process of correcting the second correction data by the luminance signal, and the manufacturing method of the display device 1 according to the present embodiment is included. 2 Correction of the data stored in the memory 11 works differently. In the following description, the configuration of the display device 1 and the correction method according to the first embodiment will be omitted, and the description will be given focusing on different places.

[2.1 Configuration of Information Processing Apparatus in Manufacturing Engineering] FIG. 8 is a block diagram showing the configuration of the information processing apparatus 2A that acquires the second correction data in the manufacturing process. The information processing device 2A shown in the figure is a manufacturing process used for the display device 1, and has a conversion unit 12A.

The conversion unit 12A includes a threshold value determination unit 121A and a bit reduction unit 122A, and spreads error components of the correction data components of the pixels constituting the first correction data to the peripheral pixels of the respective pixels to form pixels of the first correction data. The correction data component is reconstructed, and the corrected data component of the reconstructed first correction data is bit-reduced and converted to the second correction data.

The threshold determination unit 121A determines a threshold value to be used when the subsequent bit reduction unit 122A performs bit reduction based on the distribution of the plurality of correction data components constituting the first correction data.

The bit reduction unit 122A quantizes the correction data component of each pixel constituting the first correction data based on the threshold determined by the threshold determination unit 121A, and causes the error component at this time to propagate to the peripheral pixels of the respective pixels to form the first The correction data component of each pixel of the correction data is reconstructed, and the second correction data is generated by performing bit reduction on the corrected data component of the reconstructed first correction data. More specifically, the bit reduction unit 122A reduces the number of bits of the corrected data component of each pixel constituting the first correction data to be smaller than the number of bits of the correction data component based on the threshold value. Correct the data component.

Incidentally, the bit reduction unit 122A may perform binarization ("0" or "1") on the correction data component of the first modified data that has been reconstructed based on the threshold determined by the threshold determination unit 121A. In this case, it will be possible to make the revised data the lightest.

For example, the quantization method for reconstructing the error component of the correction data component of each pixel constituting the first correction data to the peripheral pixels of each pixel and reconstructing the correction data component of each pixel constituting the first correction data is, for example, Use the error diffusion method. Others may be used as the above-described method by using a vibration method such as a random vibration method or a pattern wobbling method. By using the error diffusion method as the processing of the bit reduction unit 122A, the correction accuracy of the luminance signal can be ensured.

Incidentally, the first correction data may be obtained by the information processing device 2 shown in FIG. 7 of the first embodiment. In this case, the information processing device 2 of the first embodiment and the information processing device 2A of the present embodiment can be both the same device and have both functions. In other words, the information processing device 2A according to the present embodiment may include the calculation unit 201, the storage unit 202, and the communication unit 203 in addition to the conversion unit 12A. Alternatively, the first correction data may be given to the information processing device 2A in advance.

[2.2 Method of Manufacturing Display Device] FIG. 9 is a flowchart showing an operation of the method of manufacturing the display device 1 according to the second embodiment. FIG. 9 shows a process from the formation of the display panel of the display device 1 to the process of storing the second correction data in the memory. Hereinafter, the manufacturing process will be gradually explained in accordance with FIG.

First, formation of a display panel constituting the display device 1 is performed (S100: display panel forming step). Hereinafter, the formation process of the display panel will be exemplified. For example, a planarizing film made of an insulating organic material is formed on a substrate including a circuit element such as a TFT, and then an anode is formed on the planarizing film. Next, for example, a positive hole injection layer is formed on the anode. Next, a light-emitting layer is formed over the positive hole injection layer. Next, an electron injecting layer is formed over the light emitting layer. Then, a cathode is formed on the substrate on which the electron injecting layer is formed. By these processes, an organic EL element having a function of a light-emitting element is formed. Further, a film sealing layer is formed over the cathode. Next, a sealing resin layer is applied on the surface of the film sealing layer. Thereafter, a color filter is formed on the applied sealing resin layer. Next, an adhesive layer and a transparent substrate are disposed on the color filter. Incidentally, the film sealing layer, the sealing resin layer, the adhesive layer, and the transparent substrate correspond to a protective layer. Finally, the transparent substrate is pressed downward from the upper surface side and heat or energy rays are applied to cure the sealing resin layer, and the transparent substrate, the adhesive layer, the color filter, and the film sealing layer are subsequently bonded. The display panel is formed by the above-described forming process.

Next, the information processing device 2A acquires the first correction data (correction data before processing) for correcting the luminance signal in advance (S110: acquisition step) for causing the organic EL element 401 to emit light at a predetermined luminance. Signal. As described above, the first correction data (correction data before processing) is configured by, for example, two correction parameters such as a gain correction value and an offset correction value corresponding to the pixel 400. The method for obtaining the first correction parameter may be obtained by the information processing device 2 described with reference to FIG. 7 of the first embodiment, and may be, for example, the first correction applied to the display panel manufactured in the same batch. parameter.

Next, the information processing device 2A quantizes the corrected data component corresponding to each pixel with respect to the first correction data, and causes the error component at this time to propagate to the peripheral pixels of the respective pixels to be reconstructed (S120).

Next, the information processing device 2A performs bit reduction on the corrected data component of each of the reconstructed pixels, thereby converting the second corrected data (S130). Steps S120 and S130 are conversion steps performed by the conversion unit 12A of the information processing device 2A.

Next, the information processing device 2A stores the second correction data in advance in the memory 11 of the display device 1 (S140: storage step).

According to the above-described correction method of the display device 1 according to the present embodiment, the first correction data (correction data before processing) is not stored in the memory 11, but the second processing of the above-described steps S120 and S130 is performed. The correction data is stored in the memory 11. Since the second correction data is data obtained by bit-reducing the first correction data, the capacity is smaller than the first correction data. As a result, as the resolution of the display unit 40 increases, the effect of reducing the capacity of the memory 11 storing the second corrected data of the weight reduction becomes remarkable. Therefore, it is possible to reduce the correction data capacity and the transmission rate while ensuring the accuracy of the brightness correction.

Incidentally, in step S120, the error diffusion method may be used as a method of reconstructing the correction data component corresponding to each pixel for the first correction data order to the peripheral pixels of the respective pixels. By using the error diffusion method, the correction accuracy of the luminance signal can be ensured. Incidentally, in addition to the error diffusion method, for example, a chattering method represented by a random flutter method, a pattern wobbling method, or the like may be used.

In addition, when the error component of the correction data component corresponding to each pixel in the first correction data order is propagated to the peripheral pixels of the respective pixels, the distribution state of the correction data component constituting the first correction data may be based on the distribution state of the correction data component constituting the first correction data. The corrected threshold is used to quantify the corrected data component, and the corrected data component is reconstructed by the error component at this time.

Further, in step S130, bit reduction may be performed by binarizing the corrected data component of each pixel, and the corrected data component of each pixel is a corrected data component corresponding to each pixel for the first correction data command. The error component is a modified data component of each pixel that is propagated to the peripheral pixels of each pixel. In this case, it is possible to minimize the weight of the second correction data.

Further, the information processing device 2A may be a control unit 10 that houses the display device 1 or may be stored in the memory 11 by the manufacturing engineering control unit 10 to acquire the second correction data.

(Embodiment 3) The first embodiment is a method of correcting the display device 1 in which the first correction data is acquired, the second correction data is generated from the first correction data, and the luminance signal is corrected by the second correction data. In contrast, the present embodiment describes a display method of the display device 1 in which the second correction data is read, the luminance signal is corrected by the second correction data, and the pixel is displayed by the corrected luminance signal. In other words, the manufacturing method of the display device 1 according to the second embodiment includes the process of storing the second correction data in the memory 11, and the manufacturing method of the display device 1 according to the present embodiment includes The project of reading the stored second correction data is different from the project for performing pixel display. In the following description, the configuration of the display device 1 and the correction method according to the first embodiment will be omitted, and the description will be given focusing on different places.

[3.1 Configuration of Control Unit] FIG. 10 is a block diagram showing a configuration of the control unit 10 for causing the display device 1 to display using the second correction data. The control unit 10 shown in the figure has a memory 11 and a correction unit 13.

The correction unit 13 corrects the luminance signal using the second correction data. The luminance signal is an electrical signal applied to the pixel to cause the light-emitting element of the pixel to emit light. More specifically, in the present embodiment, the luminance signal is a data voltage applied from the data line driving circuit 20 to the gate of the driving transistor 402 in order to cause the organic EL element 401 of the pixel 400 to emit light.

Here, the display method according to the present embodiment does not correct the luminance signal by the first correction data (correction data before processing), but by lightening the correction data (first correction data) before processing. The corrected correction data (second correction data) obtained by the processing is processed to correct the luminance signal. Since the second correction data is data obtained by bit-reducing the first correction data, the capacity is smaller than the first correction data.

As a result, as the resolution of the display unit 40 increases, the effect of reducing the capacity of the memory 11 storing the second correction data that is lighter than the first correction data can be remarkable. From the viewpoint that the recording medium does not require excessive capacity and long life, the memory 11 may be an invariant memory using, for example, a flash memory.

The correction unit 13 includes a data expansion unit 132 and a luminance signal correction unit 131.

The data expansion unit 132 is configured by, for example, a volatile first memory and an arithmetic circuit such as a DRAM. The data expansion unit 132 reads the second correction data from the memory 11 and temporarily stores it in the first memory. Here, the second memory in which the SRAM is provided in the first memory (or the outside) is stored in at least one of the threshold data determined by the threshold determining unit 121 and the quantized value of the first corrected data. By. The calculation circuit may be at least one of the threshold data stored in the second memory and the discrete value, and the second correction data secured by the first memory may have the second correction data stored in the memory 11 The correction data (discrete value) of the number of bits with the larger number of bits is expanded. In other words, the correction unit 13 expands the second correction data to a higher level than the second correction data by using at least one of the threshold data and the discrete value, and performs bit compression on the first correction data. Correct the data and correct the brightness signal. Incidentally, in the control unit 10 according to the present embodiment, the material expansion unit 132 is not an essential component.

However, if the bit reduction rate of the first correction data is higher, the correction accuracy of the second correction data is lowered. Therefore, when the bit reduction rate is high, the data expansion unit 132 is preferably provided.

The luminance signal correcting unit 131 corrects the luminance signal corresponding to the pixel 400 by using the second corrected data that has been developed by the data expansion unit 132. Hereinafter, an example of the correction processing of the luminance signal performed by the luminance signal correcting unit 131 will be described.

The luminance signal correcting unit 131 multiplies (or is) the gain correction value in the second correction data (gain correction value, offset correction value) by the data voltage corresponding to the pre-correction luminance signal, and adds the multiplication value to the multiplication value. The offset correction value is (or subtracted) and output to the data line drive circuit 20. Thereby, the correction data capacity and the transmission rate can be reduced while ensuring the accuracy of the brightness correction.

[3.2 Display Method of Display Device] Fig. 11 is a flowchart showing the operation of the display method of the display device 1 according to the third embodiment. 11 is a view showing a process of reading the second correction data from the control unit 10 included in the display device 1 and correcting the luminance signal to display the pixel. Hereinafter, the correction project will be gradually explained in accordance with FIG.

First, the control unit 10 reads the second correction data from the memory 11, and uses at least one of the threshold value as the reference value for the bit reduction and the discrete value after the first correction data is quantized. The correction data of the number of bits of the second correction data is also expanded (S250).

Incidentally, the above-described expansion processing in step S250 is not a necessary project. However, since the correction accuracy of the second correction data is lower as the bit reduction rate of the first correction data is higher, the expansion processing is preferably performed when the bit reduction rate is high.

Next, the control unit 10 corrects the luminance signal using the second correction data (S260: correction step).

Finally, the control unit 10 supplies the luminance signal corrected by the above-described correction step to each pixel 400, and causes the organic EL element 401 to emit light in response to the luminance signal, thereby causing the display device 1 to display (S270: display step). .

According to the display method of the display device 1 according to the above embodiment, the luminance signal is not corrected by the first correction data (correction data before processing), but is corrected by the second correction data after the bit reduction. Brightness signal. Further, the memory 11 stores the second correction data generated after the first correction data is converted. Since the second correction data is data obtained by bit-reducing the first correction data, the capacity is smaller than the first correction data. As a result, as the resolution of the display unit 40 increases, the effect of reducing the capacity of the memory 11 storing the second corrected data of the weight reduction becomes remarkable. Therefore, it is possible to reduce the correction data capacity and the transmission rate while ensuring the accuracy of the brightness correction.

(Other Embodiments) Although the above description is directed to Embodiments 1 to 3, the display device, the display device correction method, the display device manufacturing method, and the display device display method according to the present invention are not limited to the above-described implementation. form. Modifications obtained by carrying out various modifications that can be conceived by those skilled in the art from the above-described embodiments, and various devices incorporating the display device 1 according to the present invention are also included in the present invention.

For example, the display device 1 according to the first to third embodiments, the method of correcting the display device 1, the method of manufacturing the display device 1, and the display method of the display device are used in a tablet terminal as shown in FIG. With the display device according to the present invention, the method of correcting the display device 1, the method of manufacturing the display device 1, and the display method of the display device, a display having low brightness and small high definition is realized. Terminal.

Incidentally, although the above embodiment exemplifies a case where an image is displayed on the display unit 40 by a luminance signal generated based on an external video signal, the present invention is not limited thereto. The luminance signal used to illuminate a pixel is not generated by an external video signal, but may be generated by various signals for displaying a still picture or an animation.

Further, the first correction data is not limited to being generated at the time of manufacture of the display device 1. Further, the second correction data is not limited to being stored in the memory 11 at the time of manufacture of the display device 1. Even after the display device 1 is manufactured, the first correction data can be updated and the second correction data can be updated and stored based on the first correction data that has been updated, regardless of whether the display operation is in progress or during the non-display operation.

Further, the light-emitting element included in each pixel is not limited to the organic EL element, and may be a light-emitting element made of a current-driven or voltage-driven inorganic material. Industrial utilization

The present invention is particularly useful for an organic EL flat panel display to be incorporated in a display device using an organic EL element, and is most suitable for use in a display device and a correction method thereof for a small and high-definition display requiring uniform image quality.

1‧‧‧ display device
2, 2A‧‧‧ information processing device
3‧‧‧Photographing device
10,500‧‧‧Control Department
11, 512‧‧‧ memory
12, 12A‧‧‧Transition Department
13‧‧‧Amendment
20‧‧‧Data line driver circuit
30‧‧‧Scan line driver circuit
40‧‧‧Display Department
121, 121A‧‧‧ threshold decision department
122, 122A‧‧‧Dimension Reduction Department
131, 531‧‧‧Brightness Signal Correction Department
132‧‧‧Information Development Department
201‧‧‧ Calculation Department
202‧‧‧Memory Department
203‧‧‧Communication Department
400‧‧ ‧ pixels
401‧‧‧Organic EL components
402‧‧‧Drive transistor
403‧‧‧Selecting a crystal
404‧‧‧Storage Capacitor
411‧‧‧Information line
412‧‧‧ scan line
421‧‧‧Power cord
422‧‧‧Common electrode
S10~S60, S100~S140, S250~S270‧‧‧ steps

Fig. 1 is a block diagram showing the configuration of a display device according to a first embodiment. Fig. 2 is a view showing an example of a circuit configuration of a pixel according to the first embodiment and a connection to a peripheral circuit. 3 is a block diagram showing the configuration of a control unit included in the display device according to the first embodiment. 4 is a block diagram showing the configuration of a control unit included in a conventional display device. Fig. 5 is a view showing a comparison process between a display device according to the first embodiment and a conventional display device, and a result thereof. Fig. 6 is a flowchart showing the operation of the method of correcting the display device according to the first embodiment. Fig. 7 is a block diagram of a measurement system for acquiring first correction data. 8 is a block diagram showing the configuration of an information processing device that acquires second correction data in a manufacturing process. Fig. 9 is a flowchart showing the operation of the method of manufacturing the display device according to the second embodiment. FIG. 10 is a block diagram showing a configuration of a control unit for causing a display device to display using the second correction data. Fig. 11 is a flowchart showing the operation of the display method of the display device according to the third embodiment. FIG. 12 is an external view of a tablet terminal device incorporating a display device according to any of Embodiments 1 to 3.

S10~S60‧‧‧Steps

Claims (16)

A method for correcting a display device is a method for correcting a display device for correcting brightness unevenness of a display device, and the display device is configured to arrange pixels of a light-emitting element that emits light according to a brightness signal in a matrix; the method for correcting the display device includes : obtaining the step of acquiring, in advance, a plurality of correction data components corresponding to the pixels, and correcting the first correction data for correcting the luminance signal; and converting the correction data component corresponding to each pixel for the first correction data The error component is propagated to the peripheral pixels of the respective pixels, and is reconstructed, and the corrected data component of each of the reconstructed pixels is subjected to bit reduction, thereby converting to the second corrected data; and the correcting step uses the second Correct the data and correct the aforementioned brightness signal. The method for modifying a display device according to claim 1, further comprising: a saving step of storing the second correction data in advance in a memory of the display device after the converting step; the correcting step is to save the memory in the memory The second correction data is read, and the brightness information is corrected using the second correction data. The method of modifying a display device according to claim 1 or 2, wherein the converting step is performing error diffusion on the modified data component constituting the plural number of the first correction data, and performing bitwise correction data components of the complex number subjected to the error diffusion Yuan cuts and converts to the second revision data. The method of modifying a display device according to claim 3, wherein the converting step is based on the threshold data calculated in advance, and the plurality of correction data components constituting the first correction data are propagated to the peripheral pixels; and the correcting step is to constitute the foregoing (2) The correction data component of the plurality of correction data is developed using at least one of the threshold value data and the quantized discrete value of the first correction data, and is further higher than the second correction data. The aforementioned second correction data is expanded to correct the luminance signal. The method for modifying a display device according to claim 1 or 2, wherein the converting step is to binarize the corrected data component of each pixel and convert the second corrected data, and the corrected data component of each pixel is for the first Correcting the data so that the corrected data component corresponding to each pixel propagates to the peripheral pixels of each pixel to reconstruct the corrected data component of each pixel. A manufacturing method of a display device for manufacturing a display device having pixels arranged to emit light in response to a luminance signal, comprising: a display panel forming step of forming a display panel in which a plurality of pixels are disposed; a step of obtaining a first correction data for correcting the luminance signal by a plurality of correction data components corresponding to the pixels, and a conversion step of correcting a data component corresponding to each pixel for the first correction data The component is propagated to the peripheral pixels of the respective pixels to be reconstructed, and the corrected data component of each of the reconstructed pixels is subjected to bit reduction, thereby converting to the second corrected data; and the storing step is performed after the converting step The second correction data is stored in a memory of the display device. The method of manufacturing a display device according to claim 6, wherein the converting step is performing error diffusion on the plurality of corrected data components constituting the first correction data, and performing bit reduction on the plurality of corrected data components subjected to the error diffusion. And the second correction data conversion. The method of manufacturing a display device according to claim 6 or 7, wherein the converting step is to binarize the corrected data component of each pixel and convert the second corrected data, and the corrected data component of each pixel is for the first Correcting the data so that the corrected data component corresponding to each pixel propagates to the peripheral pixels of each pixel to reconstruct the corrected data component of each pixel. A display method for a display device is a display method for a display device having pixels arranged to emit light in response to a luminance signal, comprising: a correcting step of using a second correction obtained by the obtaining step and the converting step Correcting the brightness signal by the data, wherein the obtaining step is to obtain, in advance, a first correction data for correcting the brightness signal, which is composed of a plurality of correction data components corresponding to the pixels, and the conversion step is for the first correction data The error component of the corrected data component corresponding to each pixel is propagated to the peripheral pixels of each pixel, and is reconstructed, and the corrected data component of each of the reconstructed pixels is bit-reduced, thereby converting the second corrected data And a display step of supplying the brightness signal corrected by the correction step to the pixel, and causing the light-emitting element to emit light according to the brightness signal, thereby causing the display device to display. The display method of the display device of claim 9, wherein the converting step is performing error diffusion on the plurality of corrected data components constituting the first correction data, and performing bit reduction on the plurality of corrected data components subjected to the error diffusion. And the second correction data conversion. The display method of the display device according to claim 10, wherein the converting step is based on the threshold data calculated in advance, and the plurality of correction data components constituting the first correction data are propagated to the peripheral pixels; and the correcting step is to constitute the foregoing (2) The correction data component of the plurality of correction data is developed using at least one of the threshold value data and the quantized discrete value of the first correction data, and is further higher than the second correction data. The aforementioned second correction data is expanded to correct the luminance signal. The display method of the display device according to any one of claims 9 to 11, wherein the converting step is to binarize the corrected data component of each pixel and convert the second corrected data, wherein the corrected data component of each pixel is The correction data component of each pixel reconstructed by the correction data component corresponding to each pixel to the peripheral pixels of each pixel in the first correction data. A display device is a display device in which pixels having light-emitting elements that emit light in response to a luminance signal are arranged in a matrix, the display device having: a conversion unit configured to correct a plurality of corrected data components corresponding to the pixels The first correction data of the brightness signal is such that the error component of the correction data component corresponding to each pixel is propagated to the peripheral pixels of the respective pixels, and the correction data component of each of the reconstructed pixels is subjected to bit reduction. Thereby, the second correction data is converted; and the correction unit corrects the brightness signal by using the second correction data. The display device of claim 13, further comprising: a memory for storing the second correction data; and the correction unit for reading the second correction data stored in the memory and correcting the second correction data The aforementioned brightness signal. The display device according to claim 13 or 14, wherein the conversion unit performs error diffusion on the first correction data, and performs bit reduction on the correction data component of each pixel subjected to the error diffusion. The display device according to claim 13 or 14, wherein the conversion unit binarizes a correction data component of each pixel, and the correction data component of each pixel is a correction data component corresponding to each pixel in the first correction data order The correction data component of each pixel reconstructed by the error component generated during quantization and propagated to the peripheral pixels of each pixel.