KR20170055433A - Display device, correcting method of display device, manufacturing method of display device, and display method of display device - Google Patents

Abstract

Provided is a correcting method for a display device, capable of reducing the capacity of correction data and a transmission rate while securing the accuracy of correction. The correcting method for a display device (1), in which a pixel (400) with an organic EL element (401) emitting light in accordance with a brightness signal is arranged in a matrix, includes: an obtaining step (S10) of pre-obtaining first correction data for correcting the brightness signal, comprising a plurality of correction data components matched with the pixel (400); a step (S20) of reforming an error component of the correction data components, matched with each pixel, by inverting the error component to first correction data as a surrounding pixel of each pixel; a conversion step (S30) of converting the reformed correction data components of each pixel into second correction data by reducing bits of the components; and a correction step (S60) of correcting the brightness signal by using the second correction data.

Description

TECHNICAL FIELD [0001] The present invention relates to a display device, a method of calibrating the display device, a method of manufacturing the display device, and a display method of the display device. BACKGROUND OF THE INVENTION [0001]

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

An organic EL display is known as a display device using a current driven light emitting element. This organic EL display has been attracting attention because it has advantages of good viewing angle characteristics and low power consumption.

In the organic EL display, usually, the organic EL elements constituting the pixels are arranged in a matrix form. Particularly, in the active matrix type organic EL display, since the organic EL element can emit light until the next scanning (selection), the luminance of the display is not reduced even if the duty ratio is increased. Therefore, it is possible to drive at a low voltage, so that it is possible to reduce power consumption. However, in the active matrix type organic EL display, even if the same luminance signal is given due to the deviation of the characteristics of the driving transistor and the organic EL element, the luminance of the organic EL element differs in each pixel, .

As a correction method of the luminance unevenness in the conventional organic EL display, a method of compensating for unevenness of the characteristic for each pixel by correcting the luminance signal by using the correction data previously stored in the memory has been proposed.

For example, in Patent Document 1, in a display panel having a plurality of pixels including an organic EL element and a driving transistor, a representative current-voltage characteristic, a luminance-current characteristic of each divided region, and a luminance- And a correction data in which the current-voltage characteristic of each pixel obtained from these is a representative current-voltage characteristic is obtained for each pixel. According to this, high-precision correction data is acquired, thereby improving the luminance non-uniformity in the display panel surface, thereby suppressing the variation in the luminance deterioration due to the lifetime.

International Publication No. 2011/118124

However, in the organic EL display device disclosed in Patent Document 1, correction data (gain and offset) for each pixel calculated in advance is stored in the memory of the control circuit. For this reason, when the resolution of the display panel is increased while securing the high-precision correction data, the amount of correction data is increased and the data transfer rate of the luminance signal or the like is increased. Particularly, in a tablet terminal or the like requiring a high-precision miniaturization, the above problem becomes serious.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a display device, a display device correction method, a display device manufacturing method, and a display method of a display device, The purpose is to provide.

According to one aspect of the present invention, there is provided a method of correcting a display device for correcting luminance unevenness of a display device in which pixels having light emitting elements emitting light in accordance with a luminance signal are arranged in a matrix A correction step of correcting the luminance signal based on the correction data, the correction step comprising: an acquisition step of acquiring in advance the first correction data for correcting the luminance signal, the correction data being composed of a plurality of correction data elements corresponding to the pixels; A conversion step of converting an error component of a data component into a second correction data by reconstructing the reconstructed image data to peripheral pixels of the pixel and reducing a correction data component of each of the reconstructed pixels by a bit, And a correction step of correcting the luminance signal using data.

A manufacturing method of a display device according to an embodiment of the present invention is a manufacturing method of a display device in which pixels having light emitting elements emitting light in accordance with a luminance signal are arranged in a matrix, A display panel forming step of forming a display panel on which a plurality of pixels are to be formed; a display panel forming step of forming a display panel on the display panel; A conversion step of reconstructing an error component of the correction data component corresponding to the reconstructed pixel by transferring the correction data component to the peripheral pixels of each of the pixels and converting the reconstructed correction data component of each pixel into a second correction data by bit- And a storing step of storing the second correction data in a memory of the display device It shall be.

A display method of a display device according to an aspect of the present invention is a display method of a display device in which pixels having light emitting elements emitting light in accordance with a luminance signal are arranged in a matrix, An error component of a correction data component corresponding to each pixel with respect to the first correction data to an adjacent pixel of each of the pixels; Correcting the luminance signal by using the second correction data acquired by the conversion step of reconstructing the reconstructed image data in the first and second reconstructing steps and converting the reconstructed pixel data into second correction data by bit- And supplies the luminance signal corrected in the correction step to the pixel, and in accordance with the luminance signal, And a display step of displaying the display device by emitting light.

A display device according to an aspect of the present invention is a display device in which pixels each having a light emitting element that emits light in accordance with a luminance signal are arranged in a matrix form and is made up of a plurality of correction data components corresponding to the pixels, Correcting the first correction data for correcting the signal by rearranging the error component of the correction data component corresponding to each pixel to the peripheral pixels of the respective pixels and by bit-cutting the correction data component of each of the reconstructed pixels, And a correction unit for correcting the brightness signal using the second correction data.

According to the display device, the display device correction method, the display device manufacturing method, or the display method of the display device according to the present invention, the error component of the correction data component is propagated to the peripheral pixels, The correction data capacity and the transfer rate can be reduced while ensuring the accuracy of the correction.

1 is a block diagram showing a configuration of a display device according to Embodiment 1 of the present invention.
2 is a diagram showing an example of a circuit configuration of a pixel according to the first embodiment and a connection with a peripheral circuit.
Fig. 3 is a block diagram showing the configuration of a control unit included in the display device according to the first embodiment.
Fig. 4 is a block diagram showing a configuration of a control unit included in a conventional display device.
5 is a diagram for comparing the correction process of the display device according to Embodiment 1 with the conventional display device and the result thereof.
Fig. 6 is an operation flow chart for explaining the correction method of the display device according to the first embodiment.
7 is a block diagram of a measurement system for acquiring first correction data.
8 is a block diagram showing a configuration of an information processing apparatus for acquiring second correction data in a manufacturing process.
Fig. 9 is an operation flow chart for explaining the manufacturing method of the display device according to the second embodiment.
10 is a block diagram showing a configuration of a control section for displaying a display device using second correction data.
11 is an operation flow chart for explaining a display method of the display device according to the third embodiment.
12 is an external view of a tablet terminal incorporating a display device according to any one of the first to third embodiments.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a display apparatus and a correction method thereof will be described with reference to the drawings. In addition, all of the embodiments described below represent one preferred embodiment of the present disclosure. Therefore, numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of the constituent elements, the steps and the order of the steps and the like shown in the following embodiments are merely examples and do not limit the present invention. Therefore, among the constituent elements in the following embodiments, the constituent elements which are not described in the independent claim that represents the highest concept in the present invention are described as arbitrary constituent elements.

Also, each figure is a schematic diagram and is not necessarily drawn to scale. In the drawings, the same reference numerals are assigned to substantially the same components, and redundant descriptions are omitted or simplified.

(Embodiment Mode 1)

[1.1 Configuration of Display Device]

1 is a block diagram showing a configuration of a display device 1 according to a first embodiment. The display device 1 in this figure is provided with a control section 10, a data line driving circuit 20, a scanning line driving circuit 30 and a display section 40. The control unit 10 has a memory 11. The memory 11 may be disposed inside the display apparatus 1 and outside the control section 10. [

The control unit 10 controls the memory 11, the data line driving circuit 20, and the scanning line driving circuit 30. In the memory 11, for example, correction data (second correction data to be described later) after processing is stored at the completion of the manufacturing process of the display apparatus 1. [

In the display operation, the control unit 10 reads the second correction data written in the memory 11, corrects the externally input video signal (brightness signal) based on the second correction data, And outputs it to the driving circuit 20.

In the case where the control unit 10 generates the correction data (the first correction data to be described later) before processing in the manufacturing process, for example, by communicating with an external information processing apparatus, And drives the data line driving circuit 20 and the scanning line driving circuit 30 in accordance with an instruction from the apparatus.

For example, the control unit 10 converts the correction data (first correction data) before the processing in the manufacturing process, generates the correction data after the processing (second correction data) In the memory 11.

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

2 shows an example of a circuit configuration of the pixel 400 and a connection with a peripheral circuit according to the first embodiment. The pixel 400 in this figure includes a scanning line 412, a data line 411, a power source 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. The common electrode 422 is a common electrode. The peripheral circuit includes a data line driving circuit 20 and a scanning line driving circuit 30.

The scanning line driving circuit 30 is connected to the scanning line 412 and controls conduction and non-conduction of the selection transistor 403 of the pixel 400. [

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

The selection transistor 403 has a gate terminal connected to the scanning line 412 and controls the timing of supplying the data voltage of the data line 411 to the gate terminal of the driving transistor 402.

The source terminal of the driving transistor 402 is connected to the anode terminal of the organic EL element 401 and the drain terminal of the driving transistor 402 is connected to the power line 421. The gate terminal of the driving transistor 402 is connected to the data line 411 through the selection transistor 403. [ Respectively. Thus, 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 functions as a light emitting element and the cathode terminal of the organic EL element 401 is connected to the common electrode 422. [

The holding capacitor element 404 is connected between the power source line 421 and the gate terminal of the driving transistor 402. The storage capacitor element 404 maintains the immediately preceding gate voltage even after the selection transistor 403 is turned off and continuously supplies the driving current from the driving transistor 402 to the organic EL element 401 It is possible to supply it.

1 and 2, the power line 421 is connected to a power source. The common electrode 422 is also connected to the 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 causes a current according to the data voltage to flow between the source and drain terminals. As this current flows to the organic EL element 401, the organic EL element 401 emits light with the light emission luminance corresponding to the current.

In the circuit configuration of the pixel 400 shown in Fig. 2, other circuit elements, wirings, and the like may be inserted between the paths connecting the circuit elements.

[1.2 Configuration of control unit]

3 is a block diagram showing a configuration of a control section 10 included in the display apparatus 1 according to the first embodiment. The control unit 10 shown in this figure has a memory 11, a conversion unit 12, and a correction unit 13.

The conversion unit 12 converts the error component generated when the correction data component corresponding to each pixel is quantized with respect to the correction data (the first correction data) before processing having the correction data component for each pixel, And converts the correction data component of each of the reconstructed pixels into second correction data which is bit-reduced.

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

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

4 is a block diagram showing a configuration of a control unit 500 included in a conventional display device. The conventional control unit 500 shown in this 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. In addition, the control unit 500 converts a video signal to generate a luminance signal (pre-correction luminance signal) for each pixel. The luminance signal correcting unit 531 reads the first correction data from the memory 512 and multiplies (or divides) the gain correction value of the first correction data by the pre-correction luminance signal, The offset correction value is added (or subtracted) 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 timing. As a result, the luminance unevenness in the display portion is reduced.

In the above-described conventional display device, as the resolution of the display portion is increased, the amount of correction data to be stored in the memory 512 is increased, and the data transfer rate of the luminance signal or the like is raised and becomes a problem do. Particularly, in a tablet terminal requiring a high-precision miniaturization, it is difficult to secure a large-capacity memory, and it is also connected to cost-up.

On the other hand, in 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 correction data before the processing (first correction data) The luminance signal is corrected by the corrected correction data (second correction data) obtained by the processing. Hereinafter, a configuration for generating second correction data from the first correction data in the display device 1 according to the present embodiment will be described.

The conversion unit 12 includes a threshold value determination unit 121 and a bit reduction unit 122. The conversion unit 12 converts the error components of the correction data components of the pixels constituting the first correction data into the peripheral pixels of the pixels The correction data component of each pixel constituting the first correction data is rearranged, and the correction data component of the reconstructed first correction data is bit-reduced and converted into second correction data.

The threshold value determination section 121 determines a threshold value to be used for bit reduction in the subsequent bit reduction section 122 based on the distribution of a 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 value determination unit 121 and outputs the error component at that time to the periphery of each pixel The correction data component of each pixel composing the first correction data is propagated to the pixels, and the correction data component of the reconstructed first correction data is bit-reduced to generate the second correction data. More specifically, the bit reduction unit 122 corrects the correction data component of each pixel constituting the first correction data to a correction data component having a bit number smaller than the bit number of the correction data component, based on the threshold value, .

The bit reduction section 122 may binarize ("0" or "1") the correction data component of the reconstructed first correction data on the basis of the threshold value determined by the threshold value determination section 121. In this case, it is possible to make the correction data lightest.

As the quantization technique for reconstructing the correction data component of each pixel constituting the first correction data by propagating the error component of the correction data component of each pixel constituting the first correction data to the peripheral pixels of the respective pixels, , An error diffusion method is used. In addition, as the above-mentioned technique, a dithering method represented by a random dithering method and a pattern dithering method or the like is applied. It is possible to secure the correction accuracy of the luminance signal by using the error diffusion method as the processing in the bit reduction section 122. [

The memory 11 stores second correction data generated by converting the first correction data by the conversion unit 12. [ The second correction data is smaller in capacity than the first correction data because the first correction data is a bit-reduced one. As the resolution of the display unit 40 increases, the effect of reducing the capacity of the memory 11 for storing the second correction data reduced in weight by the conversion unit 12 becomes remarkable. A nonvolatile memory such as a flash memory can be applied as the memory 11 from the viewpoint that an excessive large capacity and a long life are not required as the recording medium.

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

The data expansion unit 132 is constituted by, for example, a volatile first memory such as a DRAM and an operation circuit. The data expansion unit 132 reads out the second correction data from the memory 11 and temporarily stores it in the first memory. Here, at least one of the threshold value data determined by the threshold value determining unit 121 and the discrete value obtained by quantizing the first correction data is stored in the second memory exemplified by the SRAM provided in the first memory (or outside). The arithmetic operation circuit uses the second correction data secured in the first memory as a bit larger than the number of bits of the second correction data stored in the memory (11) by using at least one of the threshold value data and the discrete value stored in the second memory (Discrete value) having the number of pixels. That is, the correction unit 13 develops the second correction data into data of higher bits than the second correction data by using at least one of the threshold value data and the discrete value, and performs bit compression And corrects the luminance signal using the corrected correction data. In the control unit 10 according to the present embodiment, the data expanding unit 132 is not an essential component.

However, the higher the bit reduction rate of the first correction data in the bit reduction section 122, the lower the correction accuracy of the second correction data. Therefore, when the bit reduction rate is high, the data expansion section 132 is provided .

The luminance signal correcting unit 131 corrects the luminance signal corresponding to the pixel 400 by using the second correction data developed in the data expanding unit 132. [ Hereinafter, an example of correction processing of the luminance signal in the luminance signal correction unit 131 will be described.

The luminance signal correction unit 131 multiplies (or divides) the gain correction value by the data voltage corresponding to the pre-correction luminance signal among the second correction data (gain correction value and offset correction value), and adds the offset correction value to the multiplication value (Or subtracts) the data to output it to the data line driving circuit 20. This makes it possible to reduce the correction data capacity and the transfer rate while ensuring the accuracy of the luminance correction.

Here, the concrete processing of the conversion unit 12 will be described in detail with reference to Fig.

5 is a view for comparing the correction process of the display device 1 according to the first embodiment with the conventional display device and the results thereof. The display image shown on the left side of this drawing is an example of an image when the display portion is intended to emit light with the same luminance as the whole display portion and the display portion is displayed with the luminance signal without correction. On the other hand, the display image shown at the upper right of FIG. 5 is an image when the display unit is displayed with the corrected luminance signal processed by the control unit 10 of the display device 1 according to the present embodiment. Note that the display image shown at the bottom right of FIG. 5 is an image when the display unit is displayed with the corrected luminance signal processed by the control unit 500 of the conventional display device.

The display image of the display device 1 according to the present embodiment shown in Fig. 5 is corrected by using the second correction data generated by the error diffusion processing and the bit reduction processing by the conversion unit 12 . In the first correction data described in Fig. 5, for example, gain correction values (correction data components) for respective pixels are displayed in a matrix form. In the display device 1 according to the present embodiment, this first correction data is subjected to error diffusion. Hereinafter, correction data during error diffusion shown in Fig. 5 will be used. For convenience of explanation, in FIG. 5, correction data during error diffusion is shown as being composed of 4 × 4 correction data components, and correction data components are represented by (rows and columns). For example, the upper left correction data component is indicated by (1, 1) and the lower right correction data component is indicated by (4, 4).

The threshold value determining section 121 sets the threshold value (= 1.012), the subtracted value (= 0.893), and the overturned value (= 1.012) from the distribution state of each correction data component of the first correction data, 1.130). Here, each of the undersurface and the undersurface is a discrete value obtained by quantizing (the correction data component of) the first correction data.

Next, the bit reduction unit 122 compares the corrected data component (1, 1) of the first correction data with the threshold value (0.999 &lt; 1.012) (0.893). Then, the correction data component (1, 1) is quantized by setting the binary data of the correction data component (1, 1) to "0". Next, the bit reduction section 122 distributes the difference (error component) (0.106) between the before-processing data 0.999 and the after-processing data 0.893 in the correction data component (1, 1) (1.052 &gt; 1.012) is compared with a value (1.052 = 1.0058 + 0.046) obtained by adding one distribution value (0.046 = 0.106 x 7/16) to the correction data components (1 and 2) of the first correction data. From this result, the correction data component (1, 2) after error diffusion processing is replaced with the discarded value (1.130) as the discrete value. Then, the correction data components (1, 2) are quantized by setting the binary data of the correction data components (1, 2) to "1". Next, the bit reduction section 122 calculates a distribution value (hereinafter referred to as a &quot; bit value &quot;) by distributing the difference (-0.124) between the unprocessed data 1.0058 and the processed data 1.130 in the correction data components 1 and 2 (-0.054 = -0.124 x 7/16) is compared with a value (0.9714) added to the correction data components (1, 3) of the first correction data (0.9714 <1.012). From this result, the correction data components (1, 3) after the error diffusion processing are replaced with the division value (0.893) which is the discrete value and the binary data is set to "0" do. Hereinafter, the correction data during the error diffusion in FIG. 5 is stored in the correction data components (1, 2) to the correction data components (2, 1), (2, 2) Is displayed. In the same manner, error diffusion processing is performed on all correction data components to generate second correction data (quantized) as shown in Fig. 5, the values of the correction data components (1, 4), (2, 4), and (3, 1) to (4, 4) are shown before the diffusion processing .

As described above, the bit reduction unit 122 corrects the correction data components (1, 1) of each pixel constituting the first correction data based on the threshold value determined by the threshold value determination unit 121 by applying the error diffusion processing, (4, 4) are quantized and the error component at that time is propagated to the peripheral pixels of the pixels to reconstruct the correction data component of each pixel constituting the first correction data, and the reconstructed first correction data The correction data component is bit-reduced to generate second correction data. 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 expanding unit 132 reads out the second correction data that has been binarized (quantized) and temporarily stores the second correction data in the first memory, and stores the second correction data in the threshold value (= 1.012) (A discrete value) having a bit number larger than the number of bits of the second correction data by using the correction value (= 1.130). More specifically, as shown in the second correction data (after development) in Fig. 5, the data expanding unit 132 sets "0" as the second correction data component (1, 1) (= 0.893) using the lowered bottom (= 0.893). Further, the second correction data component (1, 2) "1" is developed into a cheek value (= 1.130) by using a threshold value (= 1.012) and a cheek value (= 1.130).

In the present embodiment, the second correction data is bit-reduced by one bit ("0" or "1"). However, the present invention is not limited to this. When the second correction data is bit-wise reduced by two or more bits, the data expanding unit 132 uses either one of the threshold value data or the discrete data obtained by quantizing the correction data component of the first correction data, (Discrete value) having a bit number larger than the number of bits.

For example, when the second correction data is 3 bits, the threshold value is 0.910, 0.944, 0.978, 1.012, 1.045, 1.079, and 1.113, and the first correction data is a quantized discrete value 0 &quot;), 0.992 (&quot; 2 &quot;), 0.995 (&quot; 3 &quot;), 1.028 (&quot; 4 &quot;), 1.062 (&Quot; 6 &quot;), and 1.130 (&quot; 7 &quot;). In this case, the data expanding unit 132 reads each correction data component of the second correction data quantized from &quot; 0 &quot; to &quot; 7 &quot;, temporarily stores the correction data component in the first memory, (A discrete value) having a bit number (4 or more bits) larger than the bit number of the second correction data by using only the seven threshold values. For example, when the correction data component (1, 1) of the second correction data is "2", the developed correction data component (1, 1) is determined as a discrete value between the threshold value of 0.944 and the threshold value of 0.978, Quot; 2 &quot;) is calculated. When the correction data components 1 and 2 of the second correction data are &quot; 0 &quot;, the developed correction data components 1 and 2 take a discrete value smaller than the threshold value 0.910 and obtain 0.910- (0.944-0.910) 0.893 (&quot; 0 &quot;) is calculated by / 2 (subtracting half of the threshold value interval from 0.910).

The data expanding unit 132 reads each correction data component of the second correction data quantized from &quot; 0 &quot; to &quot; 7 &quot;, temporarily stores the correction data component in the first memory, , It is possible to expand into a correction data component (discrete value) having the number of bits (4 bits or more) larger than the number of bits of the second correction data using only the seven discrete values. For example, when the correction data component (1, 1) of the second correction data is "1", the developed correction data component (1, 1) is calculated to be the second largest 0.927 ("1"). When the correction data components 1 and 2 of the second correction data are &quot; 5 &quot;, the developed correction data components 1 and 2 are calculated to be the sixth largest 1.062 (&quot; 5 &quot;).

The data expanding unit 132 reads each correction data component of the second correction data quantized from &quot; 0 &quot; to &quot; 7 &quot;, temporarily stores the correction data component in the first memory, (Discrete value) having the number of bits (4 bits or more) larger than the number of bits of the second correction data using only the maximum and minimum values of the seven discrete values. For example, it is possible to calculate the seven discrete values using the maximum value and the minimum value and the number of bits (3 bits) of the second correction data. As a result, for example, when the correction data component (1, 1) of the second correction data is "1", the developed correction data component (1, 1) . When the correction data components 1 and 2 of the second correction data are &quot; 5 &quot;, the developed correction data components 1 and 2 are calculated to be the sixth largest 1.062 (&quot; 5 &quot;). When calculating the seven discrete values by using the maximum value and the minimum value and the number of bits (3 bits) of the second correction data, the seven discrete values are calculated as an even number as well as the weighted arrays and the random arrays Or the like.

5, all of the display images displayed by the luminance signal corrected by the control unit 10 and the conventional control unit 500 of the present embodiment are compared with the display image by the luminance signal without correction, Is greatly reduced. However, the number of bits of the correction data differs between the display image by the control unit 10 of the present embodiment and the display image by the conventional control unit 500. [ That is, the second correction data, which is bit-reduced by the control unit 10 of the present embodiment, has a smaller data capacity than the first correction data used in 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 increases, it becomes possible to reduce the correction data capacity and the transfer rate while securing the accuracy of the luminance correction.

In the display device 1 according to the present embodiment, the converting section 12 and the correcting section 13 may be realized as an integrated circuit IC, or in particular, an LSI (Large Scale Integration). The method of making the integrated circuit may be realized by a dedicated circuit or a general-purpose processor. An FPGA (Field Programmable Gate Array) that can be programmed after the LSI fabrication, or a reconfigurable processor capable of reconfiguring connection and setting of circuit cells in the LSI may be used. Further, if the technique of making an integrated circuit replaced with LSI by the advancement of semiconductor technology or another technique derived therefrom appears, naturally, functional blocks may be integrated using the technique. The converting unit 12 and the correcting unit 13 may be embodied as a program for executing the encode processing and the decode processing or may be embodied as a computer readable non-transitory recording medium on which the program is recorded, for example, a flexible disk, A hard disk, a CD-ROM, an MO, a DVD, a DVD-ROM, a DVD-RAM, a BD (Blu-ray (registered trademark) Disc) or a semiconductor memory. Needless to say, such a program can be distributed through a recording medium such as a CD-ROM and a transmission medium such as the Internet.

[1.3 Correction method of display device]

Next, a correction method of the display apparatus 1 according to the present embodiment will be described.

6 is an operation flow chart for explaining a correction method of the display apparatus 1 according to the first embodiment. Fig. 6 shows the steps until the control section 10 of the display apparatus 1 corrects the luminance signal by the second correction data. Hereinafter, the correction process will be described with reference to Fig.

First, the control unit 10 acquires first correction data (correction data before processing) for correcting the luminance signal for causing the organic EL element 401 to emit light at a predetermined luminance (S10: acquisition step). As described above, the first correction data (correction data before processing) is composed of, 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 acquiring the first correction parameter will be exemplified.

7 is a block diagram of a measurement system for acquiring first correction data. The measurement system shown in this figure includes an information processing apparatus 2, an image pickup apparatus 3, a display unit 40, and a control unit 10.

The information processing apparatus 2 includes a calculation unit 201, a storage unit 202 and a communication unit 203 and has a function of controlling a process up to the generation of the first correction parameter. As the information processing apparatus 2, for example, a personal computer is applied.

The image pickup apparatus 3 picks up the image of the display section 40 by a control signal from the communication section 203 and outputs the picked up image data to the communication section 203. As the image pickup device 3, for example, a CCD camera or a luminance meter is used.

The information processing apparatus 2 outputs control signals to the control section 10 and the image pickup apparatus 3 of the display apparatus 1 via the communication section 203 and outputs control signals from the control section 10 and the image pickup apparatus 3, And stores the measurement data in the storage unit 202. The calculation unit 201 calculates various characteristic values and parameters based on the stored measurement data. The control unit 10 may use a control circuit not embedded in the display device 1. [

Specifically, the information processing apparatus 2 performs control of the voltage value given to the measurement pixel. The control unit 10 applies the voltage value to the measurement pixel to emit the measurement pixel. The image pickup device 3 measures the luminance value of the emitted measurement pixels. The information processing apparatus 2 receives the voltage value and the measured brightness value. The information processing apparatus 2 changes the voltage value given to the measurement pixel, performs the same control, and receives the different voltage value and the measured brightness value for the voltage value. By repeating this, the information processing apparatus 2 calculates the voltage-luminance characteristic for each of the measurement pixels, compares the voltage-luminance characteristic with the reference voltage-luminance characteristic, And calculates correction parameters (gain correction value and offset correction value).

The control unit 10 receives the correction parameter calculated by the calculation unit 201 as the first correction data through the communication unit 203. [

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

Next, the control unit 10 quantizes the correction data component corresponding to each pixel with respect to the first correction data, and reconfigures the correction data by propagating the error component at that time to the surrounding pixels of the respective pixels (S20).

Next, the control unit 10 converts the correction data component of each reconstructed pixel into second correction data by bit-cutting (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 advance in the memory 11 of the display device 1 (S40: storing step).

Next, the control unit 10 reads out the second correction data from the memory 11 and, using the threshold value which is set as the reference value of bit reduction in step S30, corrects the correction with the bit number larger than the bit number of the second correction data Data is developed (S50).

The expansion process in step S50 is not an essential process. However, the higher the bit reduction rate of the first correction data in step S30 is, the lower the correction accuracy of the second correction data. Therefore, when the bit reduction rate is high, it is preferable to perform the expansion processing.

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

According to the correction method of the display apparatus 1 according to the present embodiment as described above, the luminance signal is not corrected by the first correction data (correction data before processing), but the second signal The luminance signal is corrected by the correction data. In the memory 11, second correction data generated by converting the first correction data is stored. The second correction data is smaller in capacity than the first correction data because the first correction data is a bit-reduced one. As a result, as the resolution of the display section 40 increases, the effect of reducing the capacity of the memory 11 for storing the second lightening data is remarkable. Therefore, it is possible to reduce the correction data capacity and the transfer rate while ensuring the precision of the luminance correction.

In step S20, an error diffusion method may be used as a method of reconstructing the correction data corresponding to each pixel with respect to the first correction data by transmitting the correction data to the peripheral pixels of the respective pixels. By using the error diffusion method, the correction accuracy of the luminance signal can be ensured. In addition to the error diffusion method, a dithering method represented by, for example, a random dither method and a pattern dithering method may be applied.

When the error component of the correction data component corresponding to each pixel with respect to the first correction data is reconstructed by passing the error component to the peripheral pixels of the respective pixels, the threshold value determined by the distribution state of the correction data components constituting the first correction data The correction data component may be quantized and the correction data component may be reconstructed by the error component at that time.

In step S30, an error component of the correction data component corresponding to each pixel with respect to the first correction data is propagated to the surrounding pixels of each of the pixels, and the correction data component of each of the reconstructed pixels is subjected to bit- It may be reduced. In this case, it is possible to lighten the second correction data.

(Embodiment 2)

In the first embodiment, the first correction data is acquired, the second correction data is generated from the first correction data, and the correction method of the display device 1 until the luminance signal is corrected by the second correction data . On the other hand, in the present embodiment, the display device 1 until 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, Will be described. That is, the manufacturing method of the display device 1 according to the present embodiment includes the steps until the correction method of the display device 1 according to the first embodiment corrects the luminance signal to the second correction data , But includes a process up to storing the second correction data in the memory 11. Hereinafter, the same components as those of the display apparatus 1 according to the first embodiment and the correction method thereof will be described by focusing on different points by omitting explanations.

[2.1 Configuration of Information Processing Apparatus in Manufacturing Process]

Fig. 8 is a block diagram showing a configuration of an information processing apparatus 2A for acquiring second correction data in a manufacturing process. The information processing apparatus 2A shown in this figure is used in a manufacturing process of the display apparatus 1 and includes a conversion section 12A.

The converting section 12A includes a threshold value determining section 121A and a bit decrementing section 122A and supplies the error component of the correction data component of each pixel constituting the first correction data to the peripheral pixels of the respective pixels The correction data component of each pixel constituting the first correction data is rearranged, and the correction data component of the reconstructed first correction data is bit-reduced and converted into second correction data.

The threshold value determination section 121A determines a threshold value to be used for bit reduction by the subsequent bit reduction section 122A based on the distribution of a 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 value determined by the threshold value determination unit 121A and outputs the error component at that time to the periphery of each pixel The correction data component of each pixel composing the first correction data is propagated to the pixels, and the correction data component of the reconstructed first correction data is bit-reduced to generate the second correction data. More specifically, the bit reduction section 122A divides the correction data component of each pixel constituting the first correction data into a correction data component having a bit number smaller than the bit number of the correction data component, based on the threshold value, .

The bit reduction section 122A may binarize ("0" or "1") the correction data component of the reconstructed first correction data based on the threshold value determined by the threshold value determination section 121A. In this case, it is possible to make the correction data lightest.

As the quantization technique for reconstructing the correction data component of each pixel constituting the first correction data by propagating the error component of the correction data component of each pixel constituting the first correction data to the peripheral pixels of the respective pixels, , An error diffusion method is used. In addition, as the above-mentioned technique, a dithering method represented by a random dithering method and a pattern dithering method or the like is applied. The correction accuracy of the luminance signal can be ensured by using the error diffusion method as the processing in the bit reduction section 122A.

The first correction data may be acquired by the information processing apparatus 2 shown in Fig. 7 of the first embodiment. At this time, the information processing apparatus 2 according to the first embodiment and the information processing apparatus 2A according to the present embodiment are the same apparatus and may have both functions. That is, the information processing apparatus 2A according to the present embodiment may include an operation unit 201, a storage unit 202, and a communication unit 203 in addition to the conversion unit 12A. The first correction data may be previously given to the information processing apparatus 2A.

[2.2 Manufacturing method of display device]

Fig. 9 is an operation flow chart for explaining the manufacturing method of the display device 1 according to the second embodiment. Fig. 9 shows a process of storing the second correction data in the memory in the process of forming the display panel of the display device 1. Fig. Hereinafter, the manufacturing process will be described with reference to Fig.

First, a display panel constituting the display device 1 is formed (S100: display panel formation step). Hereinafter, the process of forming a display panel will be illustrated. For example, a planarization film made of an insulating organic material is formed on a substrate including a circuit element such as a TFT, and then a cathode is formed on the planarization film. Next, a hole injection layer, for example, is formed on the anode. Next, a light emitting layer is formed on the hole injection layer. Next, an electron injection layer is formed on the light emitting layer. Subsequently, a cathode is formed on the substrate on which the electron injecting layer is formed. By such a process, an organic EL element having a function as a light emitting element is formed. Further, a thin film encapsulation layer is formed on the cathode. Next, a sealing resin layer is applied to the surface of the thin film sealing layer. Thereafter, a color filter is formed on the applied encapsulating resin layer. Next, an adhesive layer and a transparent substrate are disposed on the color filter. The thin film encapsulating layer, the encapsulating resin layer, the adhesive layer, and the transparent substrate correspond to the protective layer. Finally, heat or energy rays are added while pressing the transparent substrate downward from the top surface side to cure the sealing resin layer, and the transparent substrate, the adhesive layer, and the color filter are bonded to the thin film sealing layer. By the above-described forming process, a display panel is formed.

Next, the information processing apparatus 2A acquires first correction data (correction data before processing) for correcting the luminance signal for causing the organic EL element 401 to emit light at a predetermined brightness (S110: acquisition step ). As described above, the first correction data (correction data before processing) is composed of, for example, two correction parameters such as a gain correction value and an offset correction value corresponding to the pixel 400. [ The method of acquiring the first correction parameter may be obtained by the information processing apparatus 2 described in the first embodiment with reference to Fig. 7, or may be acquired by, for example, The correction parameter may be useful.

Next, the information processing apparatus 2A quantizes the correction data component corresponding to each pixel with respect to the first correction data, and reconstructs the error data by causing the error component to propagate to the peripheral pixels of the respective pixels (S120).

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

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

According to the correction method of the display device 1 according to the present embodiment as described above, the first correction data (correction data before processing) is not stored in the memory 11, 2 correction data is stored in the memory 11. [ The second correction data is smaller in capacity than the first correction data because the first correction data is a bit-reduced one. As a result, as the resolution of the display section 40 increases, the effect of reducing the capacity of the memory 11 for storing the second lightening data is remarkable. Therefore, it is possible to reduce the correction data capacity and the transfer rate while ensuring the precision of the luminance correction.

In step S120, an error diffusion method may be used as a method of reconstructing the correction data corresponding to each pixel with respect to the first correction data by transmitting the correction data to the peripheral pixels of the pixels. By using the error diffusion method, the correction accuracy of the luminance signal can be ensured. In addition to the error diffusion method, a dithering method represented by, for example, a random dither method and a pattern dithering method may be applied.

When the error component of the correction data component corresponding to each pixel with respect to the first correction data is reconstructed by passing the error component to the peripheral pixels of the respective pixels, the threshold value determined by the distribution state of the correction data components constituting the first correction data The correction data component may be quantized and the correction data component may be reconstructed by the error component at that time.

In step S130, an error component of the correction data component corresponding to each pixel with respect to the first correction data is propagated to the surrounding pixels of the respective pixels, and the correction data component of each of the reconstructed pixels is binarized It may be reduced. In this case, it is possible to lighten the second correction data.

The information processing apparatus 2A may be incorporated in the control unit 10 constituting the display apparatus 1. In the manufacturing process, the control unit 10 may acquire the second correction data and store it in the memory 11 It can be memorized.

(Embodiment 3)

In the first embodiment, the first correction data is acquired, the second correction data is generated from the first correction data, and the correction method of the display device 1 until the luminance signal is corrected by the second correction data . On the other hand, in the present embodiment, the second correction data is read, the luminance signal is corrected by the second correction data, and the luminance signal of the display device 1 until the pixel is displayed by the corrected luminance signal The display method will be described. That is, the manufacturing method of the display device 1 according to the present embodiment is the same as the manufacturing method of the display device 1 according to the second embodiment except that the manufacturing process of the display device 1 But includes the step of reading the stored second correction data to the step of displaying pixels. Hereinafter, the same components as those of the display apparatus 1 according to the first embodiment and the correction method thereof will be described by focusing on different points by omitting explanations.

[3.1 Configuration of control unit]

10 is a block diagram showing a configuration of a control section 10 for displaying the display device 1 by using second correction data. The control unit 10 shown in this figure has a memory 11 and a correction unit 13.

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

Here, in the display method according to the present embodiment, the luminance signal is not corrected by the above-described first correction data (correction data before processing) but the brightness signal is obtained by processing the correction data before the processing (first correction data) The luminance signal is corrected by the correction data after the processing (second correction data). The second correction data is smaller in capacity than the first correction data because the first correction data is a bit-reduced one.

As a result, as the resolution of the display section 40 increases, the effect of reducing the capacity of the memory 11 for storing the second correction data that is lighter than the first correction data becomes remarkable. A nonvolatile memory such as a flash memory can be applied as the memory 11 from the viewpoint that an excessive large capacity and a long life are not required as the recording medium.

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

The data expansion unit 132 is constituted by, for example, a volatile first memory such as a DRAM and an operation circuit. The data expansion unit 132 reads out the second correction data from the memory 11 and temporarily stores it in the first memory. Here, at least one of the threshold value data determined by the threshold value determining unit 121 and the discrete value obtained by quantizing the first correction data is stored in the second memory exemplified by the SRAM provided in the first memory (or outside). The arithmetic operation circuit uses the second correction data secured in the first memory as a bit larger than the number of bits of the second correction data stored in the memory (11) by using at least one of the threshold value data and the discrete value stored in the second memory (Discrete value) having the number of pixels. That is, the correction unit 13 develops the second correction data into data of higher bits than the second correction data by using at least one of the threshold value data and the discrete value, and performs bit compression And corrects the luminance signal using the corrected correction data. In the control unit 10 according to the present embodiment, the data expanding unit 132 is not an essential component.

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

The luminance signal correcting unit 131 corrects the luminance signal corresponding to the pixel 400 by using the second correction data developed in the data expanding unit 132. [ Hereinafter, an example of correction processing of the luminance signal in the luminance signal correction unit 131 will be described.

The luminance signal correction unit 131 multiplies (or divides) the gain correction value by the data voltage corresponding to the pre-correction luminance signal among the second correction data (gain correction value and offset correction value), and adds the offset correction value to the multiplication value (Or subtracts) the data to output it to the data line driving circuit 20. This makes it possible to reduce the correction data capacity and the transfer rate while ensuring the accuracy of the luminance correction.

[3.2 Display method of display]

11 is an operation flow chart for explaining the display method of the display device 1 according to the third embodiment. 11 shows the steps up to the step of correcting the luminance signal and displaying the pixels in the process of the control unit 10 of the display device 1 reading the second correction data. Hereinafter, the correction process will be described with reference to FIG.

First, the control unit 10 reads out the second correction data from the memory 11, and uses at least one of a threshold value with a bit reduction reference value and a discrete value obtained by quantizing the first correction data, And develops into correction data having a bit number larger than the bit number (S250).

The expansion process in step S250 is not an essential process. However, the higher the bit reduction rate of the first correction data, the lower the correction accuracy of the second correction data. Therefore, when the bit reduction rate is high, it is preferable to perform the expansion processing.

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

Finally, the control unit 10 displays the display device 1 by supplying the corrected luminance signal to each pixel 400 in the correction step and causing the organic EL element 401 to emit light in accordance with the luminance signal ( S270: display step).

According to the display method of the display apparatus 1 according to the present embodiment as described above, the luminance signal is not corrected by the first correction data (correction data before processing), but the luminance signal is corrected by the second correction data Corrected. In the memory 11, second correction data generated by converting the first correction data is stored. The second correction data is smaller in capacity than the first correction data because the first correction data is a bit-reduced one. As a result, as the resolution of the display section 40 increases, the effect of reducing the capacity of the memory 11 for storing the second lightening data is remarkable. Therefore, it is possible to reduce the correction data capacity and the transfer rate while ensuring the precision of the luminance correction.

(Other Embodiments)

Although the embodiments 1 to 3 have been described above, the display device, the display device correction method, the display device manufacturing method, and the display method of the display device according to the present invention are not limited to the above embodiments . Various modifications that can be made by those skilled in the art without departing from the gist of the present invention with respect to the above-described embodiments, and various devices incorporating the display device 1 according to the present invention are also included in the present invention do.

For example, the display device 1, the method of correcting the display device 1, the method of manufacturing the display device 1, and the display method of the display device according to Embodiments 1 to 3 are the same as those shown in Fig. 12 And is applied to the tablet terminal. A small-sized, high-precision tablet terminal equipped with a display whose luminance unevenness is suppressed by the display device, the correction method of the display device (1), the manufacturing method of the display device (1) .

In the above embodiment, the case where the image is displayed on the display unit 40 by the luminance signal generated based on the external video signal is exemplified, but the present invention is not limited to this. A luminance signal for causing a pixel to emit light is generated not only by an external video signal but also by various signals for displaying a still image or a moving image.

Note that the first correction data is not limited to those generated at the time of manufacturing the display apparatus 1. The second correction data is not limited to being stored in the memory 11 when the display device 1 is manufactured. The first correction data may be updated even after the display device 1 is manufactured or during the display operation or the non-display operation, and the second correction data may be updated and stored based on the updated first correction data.

The light-emitting element of each pixel is not limited to the organic EL element, and may be a light-emitting element formed of a current-driven or voltage-driven inorganic material.

&Lt; Industrial Availability >

INDUSTRIAL APPLICABILITY The present invention is most suitable for use as a display device of a small-sized high-precision display and a method of correcting it, which is particularly useful for an organic EL flat panel display incorporating a display device using an organic EL element and requiring uniformity in image quality.

1 display device 2, 2A information processing device
3 imaging device 10, 500 control unit
11, 512 memory 12, 12A converter section
13 correction unit 20 data line driving circuit
30 scanning line drive circuit 40 display section
121, 121A Threshold value determination unit 122, 122A Bit reduction unit
131, 531 luminance signal correction unit 132 data development unit
201 calculation unit 202 a storage unit
203 communication unit 400 pixels
401 Organic EL element 402 Driving transistor
403 selection transistor 404 holding capacitor element
411 data line 412 scanning line
421 Power line 422 Common electrode

Claims (16)

A method of correcting a luminance unevenness of a display device in which pixels having light emitting elements emitting light in accordance with a luminance signal are arranged in a matrix,
An acquiring step of acquiring in advance the first correction data for correcting the luminance signal, the correction data being composed of a plurality of correction data elements corresponding to the pixels;
Wherein the first correction data is transmitted to an adjacent pixel of the correction data component corresponding to each pixel to reconstruct the first correction data and a correction data component of each of the reconstructed pixels is bit- Into a correction data;
And a correction step of correcting the luminance signal using the second correction data. The method according to claim 1,
Further comprising a storing step of previously storing the second correction data in a memory of the display device after the conversion step,
Wherein the correction step reads the second correction data stored in the memory and corrects the brightness signal using the second correction data. The method according to claim 1 or 2,
Wherein the conversion step includes error diffusion of the plurality of correction data components constituting the first correction data and conversion of the plurality of correction data components subjected to the error diffusion to bit reduction and conversion into second correction data, Way. The method of claim 3,
Wherein said conversion step includes causing said plurality of correction data components constituting said first correction data to be transmitted to peripheral pixels based on previously calculated threshold value data,
Wherein the correction step uses each of the plurality of correction data components constituting the second correction data by using at least one of the threshold value data and the discrete value obtained by quantizing the first correction data, Bit data, and corrects the luminance signal using the developed second correction data. The method according to claim 1 or 2,
In the conversion step, a correction data component corresponding to each pixel with respect to the first correction data is propagated to peripheral pixels of each pixel, and the correction data component of each reconstructed pixel is binarized and converted into the second correction data , And a correction method of the display device. A method of manufacturing a display device in which pixels having light emitting elements that emit light in accordance with a luminance signal are arranged in a matrix,
A display panel forming step of forming a display panel on which a plurality of the pixels are arranged;
An acquiring step of acquiring in advance the first correction data for correcting the luminance signal, the correction data being composed of a plurality of correction data elements corresponding to the pixels;
The first correction data is reconstructed by propagating the error component of the correction data component corresponding to each pixel to the peripheral pixels of the respective pixels and the correction data component of each of the reconstructed pixels is converted into second correction data by bit- ,
And a storing step of, after the converting step, storing the second correction data in a memory of the display device. The method of claim 6,
Wherein the conversion step includes error diffusion of the plurality of correction data components constituting the first correction data and bit reduction of the plurality of error correction-corrected correction data components into second correction data. Way. The method according to claim 6 or 7,
In the conversion step, a correction data component corresponding to each pixel with respect to the first correction data is propagated to peripheral pixels of each pixel, and the correction data component of each reconstructed pixel is binarized and converted into the second correction data , And a manufacturing method of a display device. A display method of a display device in which pixels having light emitting elements emitting light in accordance with a luminance signal are arranged in a matrix,
An acquisition step of previously acquiring first correction data for correcting the luminance signal, the correction data being composed of a plurality of correction data components corresponding to the pixels; Using the second correction data acquired by the conversion step of converting the error component into the second correction data by preliminarily reconstructing the error component to the peripheral pixels of each pixel and reducing the correction data component of each of the reconstructed pixels by bit- A correction step of correcting the luminance signal;
And a display step of displaying the display device by supplying the luminance signal corrected in the correction step to the pixel and causing the light emitting element to emit light in accordance with the luminance signal. The method of claim 9,
Wherein said conversion step includes error diffusion of said plurality of correction data components constituting said first correction data and bit reduction of said error correction diffused data components into a second correction data, Way. The method of claim 10,
Wherein said conversion step includes causing said plurality of correction data components constituting said first correction data to be transmitted to peripheral pixels based on previously calculated threshold value data,
Wherein the correction step uses each of the plurality of correction data components constituting the second correction data by using at least one of the threshold value data and the discrete value obtained by quantizing the first correction data, Bit data, and corrects the luminance signal by using the developed second correction data. The method according to any one of claims 9 to 11,
In the conversion step, a correction data component corresponding to each pixel with respect to the first correction data is propagated to peripheral pixels of each pixel, and the correction data component of each reconstructed pixel is binarized and converted into the second correction data , And a display method of the display device. A display device in which pixels having light emitting elements emitting light in accordance with a luminance signal are arranged in a matrix,
The first correction data for correcting the luminance signal is constituted by a plurality of correction data components corresponding to the pixels and the error component of the correction data component corresponding to each pixel is propagated to the peripheral pixels of the pixels and reconstructed A conversion unit for converting a correction data component of each of the reconstructed pixels into second correction data by performing bit reduction;
And a correction unit that corrects the brightness signal using the second correction data. 14. The method of claim 13,
Further comprising a memory for storing the second correction data,
Wherein the correction unit reads the second correction data stored in the memory and corrects the brightness signal using the second correction data. The method according to claim 13 or 14,
Wherein the conversion unit error-diffuses the first correction data and performs bit reduction on the correction data component of each error-diffused pixel. The method according to claim 13 or 14,
The conversion unit may include an error component generated when quantizing the correction data component corresponding to each pixel with respect to the first correction data to the peripheral pixels of the respective pixels to binarize the correction data component of each of the reconstructed pixels , Display device.

Images