WO2020162017A1

WO2020162017A1 - Display data generation device and display device

Info

Publication number: WO2020162017A1
Application number: PCT/JP2019/047392
Authority: WO
Inventors: 翔仲光
Original assignee: 京セラ株式会社
Priority date: 2019-02-04
Filing date: 2019-12-04
Publication date: 2020-08-13
Also published as: JP2022046836A

Abstract

This display data generation device is provided with: a first display data generation unit (1) which generates first display data Din[n+m] including binarized higher-order bit data (n-bit) and binarized lower-order bit data (m-bit); a data separation unit (3) which separates the binarized higher-order bit data and the binarized lower-order bit data as second display data x and first dithering data y (=y[m]), respectively; a probability circuit (4) whereby second dithering data Y[1] that is to be added to the second display data x (=x[n]) is determined to be "1" at a variable probability based on the bit count m and the value of the first dithering data y[m]; and a second display data generation unit (5) which feeds, to a display device (6), third display data Dout[n] generated by adding the second dithering data Y[1] to the second display data x[n].

Description

Display data generation device and display device

The present disclosure relates to a display data generation device and a display device that generate and supply display data including dithering data to each unit pixel unit of a display device driven by an active matrix method.

An example of the basic configuration of a conventional active matrix type liquid crystal display device (Liquid Crystal Display: LCD) is described in Patent Document 1, for example.

JP-A-2004-78059

A display data generation device of the present disclosure generates a display data including dithering data and supplies the display data including the dithering data to each of the unit pixel units of a display device having a plurality of unit pixel units and driven by an active matrix method. A first display data generation unit for generating first display data having binarized high-order bit data composed of a plurality of bits and binarized low-order bit data composed of 1 bit or more; A data separating unit that separates the binarized upper bit data into second display data and the binarized lower bit data as first dithering data, and a second dither that adds the binarized lower bit data to the second display data. The ring data is determined to be “1” with a probability based on the number of bits and the value of the first dithering data, and is determined to be “0” in other cases, and a probability variable unit that makes the probability variable is provided. And a second display data generation unit that supplies third display data generated by adding the second dithering data to the second display data to the display device. Is.

A display device according to the present disclosure is a display device including the display data generation device according to the present disclosure, and includes a selection unit that selects whether to capture the third display data generated by the display data generation device. It has a structure.

Objects, features, and advantages of the present disclosure will become more apparent from the following detailed description and drawings.
1 shows an example of an embodiment of a display data generation device of the present disclosure, and is a block circuit diagram of the display data generation device. 1 shows an example of an embodiment of a display data generation device of the present disclosure, and is an arithmetic expression that determines a probability in a probability circuit. 13 is a table illustrating another example of the display data generation device according to the present disclosure, and is a table illustrating that the dithering process is performed once every four frames. It is a block circuit diagram of the stochastic circuit shown in FIG. 1A. It is a table explaining that the probability is variable by a plurality of lookup tables included in the probability circuit of FIG. 1A. It is a table explaining operation|movement of one of the some lookup tables contained in the probability circuit of FIG. 3A. It is a table explaining operation|movement of one of the some lookup tables contained in the probability circuit of FIG. 3A. It is a table explaining operation|movement of one of the some lookup tables contained in the probability circuit of FIG. 3A. When the number of bits m of the first dithering data is 2, the value ym in the decimal system is 0 to 3, and the maximum value ymax in the decimal system is 3, four lookups included in the probability circuit of FIG. 3A. It is a table explaining operation of one of the tables. When the number of bits m of the first dithering data is 2, the value ym in the decimal system is 0 to 3, and the maximum value ymax in the decimal system is 3, four lookups included in the probability circuit of FIG. 3A. It is a table explaining operation of one of the tables. When the number of bits m of the first dithering data is 2, the value ym in the decimal system is 0 to 3, and the maximum value ymax in the decimal system is 3, four lookups included in the probability circuit of FIG. 3A. It is a table explaining operation of one of the tables. When the number of bits m of the first dithering data is 2, the value ym in the decimal system is 0 to 3, and the maximum value ymax in the decimal system is 3, four lookups included in the probability circuit of FIG. 3A. It is a table explaining operation of one of tables. FIG. 3 is a block circuit diagram of a basic configuration of an LCD having a configuration based on the liquid crystal display device of the present disclosure.

Hereinafter, embodiments of the display data generation device and the display device of the present disclosure will be described with reference to the drawings. However, the drawings referred to below show the main components of the display data generating device and the display device of this embodiment. Therefore, the display data generation device and the display device of the present embodiment may include well-known constituent members such as a circuit board, wiring conductors, control IC, and LSI, which are not shown.

First, a liquid crystal display device based on the liquid crystal display device of the present disclosure will be described with reference to FIG. 6.

FIG. 6 shows an example of the basic configuration of an active matrix type liquid crystal display device (Liquid Crystal Display: LCD) based on the liquid crystal display device of the present disclosure. For example, in the case of an IPS (In-Plane Switching) type LCD, the TFT array side substrate 20 on which a large number of pixel electrode portions P11, P12, P13 to Pmn including the TFT 21 are formed is arranged in the first direction (for example, the row). Direction) and a plurality of gate signal lines GL1, GL2, GL3 to GLm, and gate signal lines GL1, GL2, GL3 to GLm in a second direction (eg, column direction) intersecting the first direction. Multiple image signal lines (source signal lines) SL1, SL2, SL3 to SLn formed by crossing, intersections of gate signal lines GL1, GL2, GL3 to GLm and image signal lines SL1, SL2, SL3 to SLn And a common electrode for forming a lateral electric field (horizontal electric field) applied to the liquid crystal between the TFT 21, the pixel electrodes PE11, PE12, PE13 to PEmn and the pixel electrodes PE11, PE12, PE13 to PEmn. The configuration includes a pixel electrode portion and a common voltage line 22 that supplies a common voltage (Vcom) to the common electrode. In FIG. 6, 23 is a gate signal line drive circuit for sequentially inputting gate signals to the gate signal lines GL1, GL2, GL3 to GLm, and 24 is sequentially inputting image signals to the image signal lines SL1, SL2, SL3 to SLn. This is an image signal line drive circuit. This IPS type LCD can enhance viewing angle characteristics such as contrast, gray inversion, and color shift compared to an LCD that drives a Twisted Nematic (TN) liquid crystal by a vertical electric field. As a result, a wide viewing angle can be obtained, which is suitable for large-sized LCDs.

In addition, such LCDs are becoming higher resolution and more gradation, and in order to correspondingly improve the image quality, a dithering method that artificially increases the number of gradations is used. The dithering method is a method that allows an image to be displayed with an apparently larger number of colors than the actual number of colors (the number of gradations). When the dithering method is used, for example, when a single pixel portion is conspicuous more than necessary in a specific color tone, the periphery of the pixel portion is averaged as an intermediate color, and it is possible to suppress the conspicuousness more than necessary. Further, since there is a large difference in color tone between a certain image area composed of a plurality of pixel parts and the image area around it, unnatural gradation and color unevenness that makes a boundary line visible between the image areas occurs. If so, the dithering method eliminates the boundary between the image areas. As a result, a natural gradation appears between the image areas, and color unevenness is eliminated.

As shown in FIG. 1A, the display data generation device according to the present embodiment includes display data including dithering data in each unit pixel unit of a display device having a plurality of unit pixel units and driven by an active matrix method. Is a display data generating device for generating and supplying a binary high-order bit data consisting of a plurality of bits (n bits/n is an integer of 2 or more) and 2 consisting of 1 bit or more (m bits/m is a natural number). The first display data generation unit 1 that generates the first display data Din[n+m] having the binarized lower bit data and the binarized upper bit data as the second display data x are binarized. A data separation unit 3 that separates the lower-order bit data as first dithering data y (=y[m]), and second dithering data Y that is added to the second display data x (=x[n]). [1] is determined to be “1” with a probability based on the number of bits m and the value of the first dithering data y[m], and is determined to be “0” in other cases, and the probability is made variable. The probability circuit 4 having a probability varying unit and the third display data Dout[n] generated by adding the second dithering data Y[1] to the second display data x[n] are displayed on the display device 6 And a second display data generating unit 5 for supplying In the configuration of FIG. 1A, reference numeral 2 indicates a dithering portion, reference numeral 3a indicates a storage portion of the second display data x in the data separating portion 3, and reference numeral 3b indicates the first dithering data y (=y [M]) is a storage unit. The second display data generation unit 5 is composed of an adder and the like.

With the above configuration, the following effects are achieved. Since the probability circuit 4 that determines the second dithering data Y[n] to “1” or “0” with a probability has a probability varying unit, it is high in performing dithering of various images. Image quality becomes easy and the degree of freedom is improved. That is, it becomes easy to improve the image quality of various images. Further, since the third display data as the driving display data used for image display in each unit pixel portion of the display device can be generated and directly supplied to the display device, the display data such as the display memory is temporarily stored. No need for large memory. As a result, the display data transferred to the display device can be transferred at a high speed, the power consumption can be reduced, and the display device can be manufactured at low cost. The probability varying unit corresponds to a part including the selector 10, the lookup table (LUT) (0) 12, and the LUT (1) 13 to LUT (ymax) 14 shown in FIG. 3A.

Note that the display data generation device of the present embodiment basically relates to dithering processing executed in a unit pixel unit. Therefore, it is not related to the dithering process performed by referring to the display data of the unit pixel portion around the certain unit pixel portion. However, in the first display data generation unit 1 that generates the first display data Din[n+m], the display data of the peripheral unit pixel portion is intermittently and periodically added to the first display data Din[n+m]. By including it, it is possible to execute the dithering process with reference to the display data of the peripheral unit pixel portion.

The display data generation device of the present embodiment may be a driving element such as an IC or LSI in which the dithering processing program is stored in ROM (Read Only Memory), RAM (Random Access Memory), etc. It may be a drive circuit device in which a peripheral circuit and electronic elements are mounted on a substrate. Further, the driving element and the driving circuit device may be arranged inside the display device, but may be arranged as an external component outside the display device.

In the first display data Din[n+m] having the binarized high-order bit data composed of n bits (n is an integer of 2 or more) and the binarized low-order bit data composed of m bits (m is a natural number), For example, the binarized high-order bit data is about 2 to 12 bits. If it exceeds 12 bits, various circuits such as the drive circuit of the display device 6 tend to be complicated and the circuit scale tends to increase. The binarized lower bit data is, for example, about 1 bit to 4 bits. When the number of bits exceeds 4 bits, the dithering unit 2 becomes complicated and the small-capacity memory size such as LUT in the probability circuit 4 tends to increase.

FIG. 1B is an arithmetic expression for determining the probability in the probability circuit 4. Based on this arithmetic expression, the stochastic circuit 4 of the present embodiment operates as follows. The probability circuit 4 sets the number of bits of the first dithering data y[m] to m (m is a natural number), the decimal value of the first dithering data y[m] to ym, and the first dithering. When ymax is the maximum value of the data y[m] in the decimal system, the second dithering data Y[1] is determined to be “1” with a probability of {ym/(ymax+1)}×100(%). ..

According to the arithmetic expression of FIG. 1B, for example, when the number of bits m of the first dithering data y[m] is 2, when the first dithering data y[m] is “00”, the decimal system is used. When "0" and y[m] are "01", the decimal number is "1". When y[m] is "10", the decimal number is "2" and y[m] is "11". In this case, since the decimal value is “3”, the probability P(Y1) that the second dithering data Y[1] is “1” is 0%, ¼ (25%), 2 The probability is either /4 (50%) or 3/4 (75%).

Therefore, the probability can be made variable by variously setting the bit number m of the first dithering data y[m], the decimal value ym, and the decimal maximum value ymax. Further, the maximum probability is {ymax/(ymax+1)}×100(%), which is not 100(%). Therefore, a small memory of a lookup table (LUT) corresponding to 100(%) can be omitted. , It can be disabled at all times. As a result, the number of small-capacity memories such as a look-up table (LUT) used in the probability circuit 4 can be suppressed, and power consumption can be suppressed.

FIG. 2 shows another example of the display data generation device according to the present embodiment, and is a table for explaining that the dithering process is performed once every four frames. As shown in FIG. 2, the probability circuit 4 of the display data generating apparatus according to the present embodiment outputs the second dithering data Y[1] in ym frames of the selected (ymax+1) frames. It is better to decide "1". In this case, since the dithering process can be performed on the selected frame, the degree of freedom in improving the image quality of various images is improved. Note that when m is 2 and y[m] is “00”, the decimal value ym is 0, so ym=0 frames among the selected (ymax+1)=4 frames In, the second dithering data Y[1] is determined to be "1". When m is 2 and y[m] is “01”, the decimal value ym is 1, and therefore, in the ym=1 frame among the selected (ymax+1)=4 frames, The dithering data Y[1] of 2 is determined to be "1". When m is 2 and y[m] is “10”, the decimal value ym is 2, and therefore the first value in ym=2 frames out of the selected (ymax+1)=4 frames. The dithering data Y[1] of 2 is determined to be "1". When m is 2 and y[m] is “11”, the decimal value ym is 3, and therefore, in the selected (ymax+1)=4 frames, ym=3 The dithering data Y[1] of 2 is determined to be "1". The configuration shown in FIG. 2 is a case where m is 2 and y[m] is “01”, and the decimal value ym is 1. Therefore, ym of the selected (ymax+1)=4 frames is ym. This corresponds to the case where the second dithering data Y[1] is determined to be “1” in one frame.

FIG. 2 shows a case where the first display data Din[8+2] has binarized high-order bit data of 8 bits and binarized low-order bit data of 2 bits. The binarized high-order bit data is data corresponding to the third display data Dout[n] for driving the display device. The binarized lower-order bit data corresponds to the second dithering data Y[1], and is added to the second display data x[n] to be finally reduced.

In the example of FIG. 2, the dithering process is executed in the third frame of the first to fourth frames. Further, the dithering process of adding “1” is executed in the fifth frame of the fifth to eighth frames.

Also, in the display data generation device of the present embodiment, as shown in FIG. 2, (ymax+1) frames (for example, four frames) may be consecutive (ymax+1) frames. In this case, since all the frames can be the target of the dithering process, the image quality can be improved more effectively.

As shown in FIG. 3A, the display data generation device according to the present embodiment includes a random number generation circuit 11 in the probability circuit 4, and the random number generation circuit 11 is the second of the (ymax+1) frames. It is preferable to select the frame that determines the dithering data Y[1] of “1”. In this case, it is possible to effectively suppress the occurrence of unnatural gradation and color unevenness in the display image. Further, the random number generation circuit 11 can also select a frame in which the second dithering data Y[1] is determined to be “1” from among the (ymax+1) frames with variable probability.

In the probability circuit 4 of FIG. 3A, the selector 10 selects an output signal OUT1, OUT2 to OUTymax+1 according to the bit number m of the first dithering data y[m] and the value (value in binary). To do. When m is 2 and y[m] is "00", the output signal OUT1 is selected. When m is 2 and y[m] is “01”, the output signal OUT2 is selected. When m is 2 and y[m] is “11” (=ymax: 3 in decimal), the output signal OUTymax+1 is selected.

Then, any one of the output signals OUT1 and OUT2 to OUTymax+1 is input to one of the enable EN terminals of the LUT(0) and LUT(1) to LUT(ymax), and LUT(0) and LUT(1) to Any one of the LUTs (ymax) is activated (started) and operated. The output signal OUT1 is input to the enable terminal EN of the LUT(0) and activates the LUT(0). The output signal OUT2 is input to the enable terminal EN of the LUT(1) and activates the LUT(1). The output signal OUTymax+1 is input to the enable terminal EN of the LUT(ymax) and activates the LUT(ymax).

A random selection signal is input from the random number generation circuit 11 to each of the input terminals IN of the LUT(0) and LUT(1) to LUT(ymax) together with any one of the output signals OUT1 and OUT2 to OUTymax+1 output from the selector 10. .. As shown in FIGS. 4A, 4B, and 4C, the random selection signal causes one of the LUT(0) and LUT(1) to LUT(ymax) to be activated and select one OUT data. ..

For example, when the LUT(0) is activated, the OUT data of the LUT(0) is all “0” as shown in FIG. 4A, so the OUT data is always “0”. That is, the LUT(0) has a probability of {0/(ymax+1)}×100(%) as shown in the column of LUT(0) in FIG. 3B, and the second dithering data Y[1] is “ 1”.

When the LUT(1) is activated, as shown in FIG. 4B, only one OUT data of the LUT(1) is “1” and the rest is “0”, so the OUT data is {1/( ymax+1)}×100(%) with a probability of “1”. That is, the LUT(1) has a probability of {1/(ymax+1)}×100(%) as shown in the column of LUT(1) in FIG. 3B, and the second dithering data Y[1] is “ 1”.

When the LUT(ymax) is activated, as shown in FIG. 4C, only one OUT data of the LUT(ymax) is “0” and the rest is “1”, so the OUT data is {ymax/( ymax+1)}×100(%) with a probability of “1”. That is, as shown in the LUT(ymax) column of FIG. 3B, the LUT(ymax) has the probability of {ymax/(ymax+1)}×100(%) and the second dithering data Y[1] is “ 1”.

As described above, any one of the activated LUT(0) and LUT(1) to LUT(ymax) sets the second dithering data Y[1] to “1” with its unique probability. decide. In other words, in order to change the probability, any one of LUT(0) and LUT(1) to LUT(ymax) may be activated.

5A, 5B, 5C and 5D show that the bit number m of the first dithering data y[m] is 2, the decimal value ym is 0 to 3, and the decimal maximum value ymax is 3. 3B is a table for explaining the operation of each of the four LUT(0) to LUT(3) included in the probability circuit of FIG. 3A. The LUT(0) operates to determine the second dithering data Y[1] to be “1” with a probability of {0/(3+1)}×100(%). The LUT(1) operates to determine the second dithering data Y[1] to be “1” with a probability of {1/(3+1)}×100(%). The LUT(2) operates to determine the second dithering data Y[1] to be “1” with a probability of {2/(3+1)}×100(%). The LUT(3) operates to determine the second dithering data Y[1] to be “1” with a probability of {3/(3+1)}×100(%). In this way, by activating any of LUT(0) to LUT(3), with the probability of any of 0(%), 25(%), 50(%), and 75(%), The dithering data Y[1] of 2 can be determined to be "1". That is, the probability of determining the second dithering data Y[1] as “1” can be made variable to any of 0(%), 25(%), 50(%), and 75(%). it can.

The display device of the present embodiment is a display device including the display data generation device of the present embodiment, and selects whether to take in the third display data Dout[n] generated by the display data generation device. It is the structure provided with the selection part. With this configuration, it is possible to select whether or not to execute the dithering process, and the degree of freedom of image processing for various images is further improved. In the configuration of FIG. 1A, the selection unit can be inserted and arranged in series in the transmission line between the third display data generation unit 5 and the display device 6, for example. It is possible to capture the third display data Dout[n] by setting the selection unit as a switch circuit and closing the switch circuit (ON state). By setting the switch circuit to the open state (off state), the third display data Dout[n] can be prevented from being taken in. Further, when the third display data Dout[n] is not captured, the display data that has not been subjected to the dithering process may be input to the display device 6. Further, the third display data Dout[n] can be always taken in by setting the switch circuit to the normally closed state (on state).

The display device of the present disclosure may be a display device having a plurality of unit pixel portions and driven by an active matrix method, and may be, for example, an LCD, an organic EL (Electro Luminescence) device, an inorganic EL device, a plasma display, an FED (Field). Emitting Display), SED (Surface-conduction Electron-emitter Display), GLV (Grating Light Valve) device, PDP (Plasma Display) device, DMD (Digital micro Mirror Device), piezoelectric ceramic display, micro LED display, etc. It may be.

Note that the display data generation device and the display device of the present disclosure are not limited to the above-mentioned embodiment, and may include appropriate design changes and improvements.

The present disclosure can have the following embodiments.

In the display data generating device of the present invention, the probability circuit is configured such that the number of bits of the first dithering data is m (m is a natural number), the decimal value of the first dithering data is ym, and the first dithering data is ym. When ymax is the maximum value of the dithering data of 1 in the decimal system, the second dithering data may be determined to be "1" with a probability of {ym/(ymax+1)}×100(%).

In the display data generation device of the present disclosure, the probability circuit may determine the second dithering data to be “1” in ym frames of the selected (ymax+1) frames.

Further, in the display data generation device according to the present disclosure, the probability circuit includes a random number generation unit, and the random number generation unit sets the second dithering data to “1” in the (ymax+1) frames. The frame to be determined may be selected.

In the display data generation device of the present disclosure, the (ymax+1) frames may be continuous (ymax+1) frames.

A display data generation device of the present disclosure generates a display data including dithering data and supplies the display data including the dithering data to each of the unit pixel units of a display device having a plurality of unit pixel units and driven by an active matrix method. A first display data generation unit for generating first display data having binarized high-order bit data composed of a plurality of bits and binarized low-order bit data composed of 1 bit or more; A data separating unit that separates the binarized upper bit data into second display data and the binarized lower bit data as first dithering data, and a second dither that adds the binarized lower bit data to the second display data. The ring data is determined to be “1” with a probability based on the number of bits and the value of the first dithering data, and is determined to be “0” in other cases, and a probability variable unit that makes the probability variable is provided. And a second display data generation unit that supplies third display data generated by adding the second dithering data to the second display data to the display device. Therefore, the following effects are achieved. Since the probability circuit that determines the second dithering data to “1” or “0” with probability has the probability varying unit, it is easy to improve the image quality when performing dithering of various images. The degree of freedom increases as That is, it becomes easy to improve the image quality of various images. Further, since it is possible to generate the third display data as the driving display data used for image display in each pixel portion of the display device and directly supply the third display data to the display device, it is possible to temporarily store the display data in the display memory or the like. Eliminates the capacity of memory. As a result, the display data transferred to the display device can be transferred at a high speed, the power consumption can be reduced, and the display device can be manufactured at low cost.

In the display data generating device according to the present disclosure, the probability circuit is configured such that the number of bits of the first dithering data is m (m is a natural number), the decimal value of the first dithering data is ym, and When ymax is the maximum value of the dithering data of 1 in the decimal system, when the second dithering data is determined to be “1” with a probability of {ym/(ymax+1)}×100(%), The probability can be made variable by variously setting the bit number m of the dithering data, the decimal value ym, and the decimal maximum value ymax. Further, the maximum probability is {ymax/(ymax+1)}×100(%), which is not 100(%). Therefore, the number of small-capacity memories such as a lookup table (LUT) used in the probability circuit is Can be suppressed.

Further, the display data generation device according to the present disclosure is selected when the probability circuit determines the second dithering data to be “1” in ym frames of the selected (ymax+1) frames. The dithering process can be performed on the selected frame. As a result, the degree of freedom in improving the image quality by the dithering process is improved.

Further, in the display data generation device according to the present disclosure, the probability circuit includes a random number generation unit, and the random number generation unit sets the second dithering data to “1” in the (ymax+1) frames. When selecting the frame to be determined to, it is possible to effectively suppress the occurrence of unnatural gradation and color unevenness.

Further, in the display data generation device of the present disclosure, when the (ymax+1) frames are continuous (ymax+1) frames, all the frames can be the target of the dithering process. As a result, more effective image quality can be achieved.

A display device according to the present disclosure is a display device including the display data generation device according to the present disclosure, and includes a selection unit that selects whether to capture the third display data generated by the display data generation device. It has a structure. With this configuration, it is possible to select whether or not to execute the dithering process, and the degree of freedom of image processing for various images is further improved.

The display data generation device and display device of the present disclosure can be applied to various electronic devices. The electronic devices include car route guidance system (car navigation system), ship route guidance system, aircraft route guidance system, smartphone terminal, mobile phone, tablet terminal, personal digital assistant (PDA), video camera, digital still camera, electronic device. Notebooks, electronic books, electronic dictionaries, personal computers, copiers, terminal devices for game machines, televisions, product display tags, price display tags, industrial programmable display devices, car audio, digital audio players, facsimiles, printers, cash There are automatic teller machines (ATM), vending machines, head-up display devices, projector devices, digital display watches, smart watches, head mounted image display devices (Head Mounted Display device: HMD), etc.

The present disclosure can be implemented in various other forms without departing from the spirit or the main feature. Therefore, the above-described embodiments are merely examples in all respects, and the scope of the present disclosure is set forth in the claims and is not bound by the specification text. Furthermore, all modifications and changes belonging to the scope of the claims are within the scope of the present disclosure.

1 1st display data generation part 2 Dithering part 3 Data separation part 4 Stochastic circuit 5 2nd display data generation part 6 Display device

Claims

A display data generation device that generates and supplies display data including dithering data to each of the unit pixel units of a display device having a plurality of unit pixel units and driven by an active matrix method,
A first display data generation unit that generates first display data having binarized high-order bit data composed of a plurality of bits and binarized low-order bit data composed of 1 bit or more;
A data separation unit that separates the binarized upper bit data as second display data and the binarized lower bit data as first dithering data;
The second dithering data to be added to the second display data is determined to be "1" with a probability based on the number of bits and the value of the first dithering data, and is determined to be "0" in other cases. And a stochastic circuit having a probability varying unit for varying the probability,
A display data generation device comprising: a second display data generation unit that supplies the second display data with the third display data generated by adding the second dithering data to the display device.
The stochastic circuit sets the number of bits of the first dithering data to m (m is a natural number), the decimal value of the first dithering data to ym, and the first dithering data to the decimal system. The display data generating device according to claim 1, wherein the second dithering data is determined to be "1" with a probability of {ym/(ymax+1)}×100(%), where ymax is a maximum value according to.
The display data generation device according to claim 2, wherein the probability circuit determines the second dithering data to be "1" in ym frames of the selected (ymax+1) frames.
The stochastic circuit includes a random number generator,
The display data generation device according to claim 3, wherein the random number generation unit selects a frame that determines the second dithering data to be “1” from the (ymax+1) frames.
The display data generation device according to claim 3 or 4, wherein the (ymax+1) frames are continuous (ymax+1) frames.
A display device comprising the display data generating device according to claim 1.
A display device comprising a selection unit for selecting whether or not to capture the third display data generated by the display data generation device.