KR102164485B1 - Display apparatus, display system and controlling method thereof - Google Patents

Abstract

A main display device is disclosed. The main display device converts data corresponding to at least one object that satisfies a preset condition among a communication unit that performs communication with a secondary display device, a display unit that displays a plurality of objects, and a plurality of objects to data equal to or less than a preset number of bits. It converts and transmits the converted data to the auxiliary display device for display. Accordingly, the main display device converts and processes data less than or equal to a preset number of bits to be quickly transmitted to the secondary display device.

Description

Display device, display system, and control method thereof {DISPLAY APPARATUS, DISPLAY SYSTEM AND CONTROLLING METHOD THEREOF}

The present invention relates to a display device, a display system, and a control method thereof, and more particularly, to a display system including a main display device, an auxiliary display device, a main display device, and an auxiliary display device, and a control method thereof.

Recently, by adding an auxiliary display device to a mobile terminal or a tablet, only necessary objects are displayed on the screen of the auxiliary display device, thereby increasing user convenience. For example, it means displaying only objects desired by the user, such as widgets, icons, text messages, schedules, and images, on the screen of the auxiliary display device.

When only necessary objects are displayed using such an auxiliary display device, necessary information can be checked without displaying a screen such as a main display device, that is, a mobile terminal or a tablet, thereby increasing convenience and reducing power consumption of the main display device. It works.

Meanwhile, data transmission and power supply for displaying the auxiliary display device have been performed through a dedicated connector connecting the auxiliary display device and the main display device, or by using a wireless communication method.

However, since data transmission and power supply for displaying the auxiliary display device is performed through a dedicated connector, the auxiliary display device cannot be operated when a cable or connector is broken. In addition, when a wireless communication method is used, the bit of wireless communication is performed. Due to the low rate, there is a problem in that the transmission speed is lowered and a delay occurs.

It is an object of the present invention to provide a main display device, an auxiliary display device, a display system, and a control method therefor, which converts and transmits data in advance.

The main display device according to an embodiment of the present invention for achieving the above object includes a communication unit that performs communication with a secondary display device, a display unit that displays a plurality of objects, and satisfies a preset condition among the plurality of objects. And a controller configured to convert data corresponding to at least one object into data having a predetermined number of bits or less, and to transmit and display the converted data to the auxiliary display device.

Here, the controller may convert data corresponding to at least one object satisfying the preset condition into 1-bit or 3-bit data.

In addition, the control unit may include a gamma correction unit for performing gamma correction on data corresponding to at least one object that satisfies the preset condition, and a conversion unit for converting the gamma-corrected data into 1 bit or 3 bits. have.

In addition, the conversion unit may compensate for data loss that occurs when converting the gamma-corrected data into the 1-bit or 3-bit data using an error-diffusion method or a dithering method.

Meanwhile, the communication unit may perform communication with the auxiliary display device according to a wireless communication method.

On the other hand, the auxiliary display device according to an embodiment of the present invention, when the communication unit for performing communication with the main display device and the data converted into data of a predetermined number of bits or less from the main display device is received, the received data And a display unit that displays a corresponding object, and the data having the predetermined number of bits or less is data corresponding to at least one object that satisfies a predetermined condition among a plurality of objects displayed on the main display device.

Here, data less than or equal to the preset number of bits is 1-bit or 3-bit data.

In addition, the communication unit may perform communication with the main display device according to a wireless communication method.

Meanwhile, a display system including a main display device and an auxiliary display device according to an embodiment of the present invention sets data corresponding to at least one object that satisfies a preset condition among a plurality of objects displayed on a screen. A main display device that converts data into bits less than or equal to the number of bits and transmits the converted data to the auxiliary display device, and an auxiliary that displays an object corresponding to data less than or equal to the preset number of bits received from the main display device. Includes a display device.

On the other hand, the control method of the main display device according to an embodiment of the present invention comprises the steps of displaying a plurality of objects, and data corresponding to at least one object satisfying a preset condition among the plurality of objects is equal to or less than a preset number of bits. And converting the converted data into data of, and transmitting the converted data to an auxiliary display device for display.

In the conversion processing, data corresponding to at least one object satisfying the preset condition may be converted into 1-bit or 3-bit data.

In addition, the converting may include performing gamma correction on data corresponding to at least one object that satisfies the preset condition, and converting the gamma-corrected data into 1 bit or 3 bits.

Here, in the step of processing the conversion, data loss that occurs when the gamma-corrected data is converted into 1-bit or 3-bit data may be compensated by using at least one of an error-diffusion method and a dithering method.

In addition, the step of transmitting the converted data to an auxiliary display device for display may include transmitting the converted data to the auxiliary display device according to a wireless communication method.

On the other hand, the control method of the auxiliary display device according to an embodiment of the present invention comprises the steps of performing communication with a main display device and when data converted into data having a predetermined number of bits or less from the main display device is received, the reception Displaying an object corresponding to the selected data, wherein the data less than or equal to the preset number of bits is data corresponding to at least one object that satisfies a preset condition among a plurality of objects displayed on the main display device. .

Here, data less than or equal to the preset number of bits is 1-bit or 3-bit data.

In addition, the performing of the communication may perform communication with the main display device according to a wireless communication method.

Meanwhile, the control method of a display system including a main display device and an auxiliary display device according to an embodiment of the present invention includes at least one of a plurality of objects displayed on a screen in which the main display device satisfies a preset condition. Converting and processing data corresponding to an object to data less than or equal to a preset number of bits, transmitting the converted data to the auxiliary display device, and the preset number of bits received from the main display device by the auxiliary display device And displaying an object corresponding to the following data.

According to various embodiments of the present disclosure as described above, the main display device converts data into data having a predetermined number of bits or less and transmits the data to the auxiliary display device quickly.

1 is a block diagram illustrating a main display device according to an embodiment of the present invention.
2 and 3 are diagrams showing the configuration and signal flow of an E-PAPER.
4 is a diagram illustrating an original image and an image to which Error-Diffusion is applied according to an embodiment of the present invention.
5 is a block diagram illustrating a control unit of a main display device according to an embodiment of the present invention.
6 is a diagram illustrating a user terminal device and an E-PAPER according to an embodiment of the present invention.
7 is a block diagram illustrating an auxiliary display device according to an embodiment of the present invention.
8 is a diagram illustrating a display system according to an embodiment of the present invention.
9 is a flowchart illustrating a method of controlling a main display device according to an embodiment of the present invention.
10 is a flowchart illustrating a method of controlling an auxiliary display device according to an embodiment of the present invention.
11 is a flowchart illustrating a method of controlling a display system including a main display device and an auxiliary display device according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

1 is a block diagram illustrating a main display device according to an embodiment of the present invention.

Referring to FIG. 1, the main display device 100 satisfies a preset condition among a communication unit 110 performing communication with an auxiliary display device (not shown), a display unit 120 displaying a plurality of objects, and a plurality of objects. A control unit 130 that converts data corresponding to at least one object to be processed into data having a predetermined number of bits or less, and transmits (not shown) the converted data to an auxiliary display device for display. .

Here, the auxiliary display device (not shown) may be used to separately display some of the objects displayed on the screen of the main display device 100 while using the main display device 100. For example, E-PAPER can be used as a secondary display device.

E-PAPER refers to a display device that can feel the feeling of paper by using a flexible material, not glass, as a substrate. It is made of plastic material so that it is not easily bent and broken, and it is thin like paper, so it can be wrinkled or folded at will, so it is portable. The image can be viewed, so the power loss is very small. In addition, the picture quality is worse than LCD, but the screen disappears immediately when the LCD is turned off, whereas the E-PAPER maintains the screen even when the power is turned off.

2 and 3 are diagrams showing the configuration and signal flow of an E-PAPER.

Referring to FIG. 2, the E-PAPER 200 includes a control unit 210 and a display panel 220. Here, the controller 210 may control the display panel 220.

Specifically, the controller 210 may control a source driver and a gate driver to drive the display panel 220 and may supply power.

Referring to FIG. 3, the control unit 210 of the E-PAPER 200 includes a gamma correction unit 310 that corrects the signal level of an image and the perceived brightness felt by an actual user's eyes in proportion to 1 bit. It consists of a half-toning unit 320 that converts and a TCON unit 330 that controls the TFT of the E-PAPER.

Here, the gamma correction means inserting a non-linear input/output characteristic to convert the conversion characteristic of the TV, and a detailed description thereof will be omitted.

On the other hand, Half-Toning is a technology that creates a black-and-white binary image from images with multiple levels of brightness, such as scanned photos or computer graphics. In other words, the half-toned image is expressed in black and white only. However, when the user sees the half-toned image, spatial integration occurs due to the action of the vision and the brain, and the effect as if passing through a low-pass filter occurs, and accordingly, the image is recognized as a continuous grayscale image. In general, Half-Toning is used to obtain high-quality output images in a low-resolution printer.

In addition, as the gradation characteristic of the E-PAPER becomes black and white binary levels during the half-toning process, input data may be lost.

That is, referring to FIG. 3, data output from the gamma correction unit 310 is 8-12 bits, and is converted into 1-bit data while passing through the half-toning unit 320, thereby causing data loss. do.

Therefore, to compensate for data loss, an error-diffusion or dithering method may be used as a binary image processing technique.

Error-Diffusion is a method of diffusing quantization errors due to binarization of pixels to surrounding pixels. The border is clear and images of excellent quality can be obtained. However, there is a disadvantage in that the execution speed is relatively slow and a worm-like pattern appears in the dark and bright areas. When applying this error-diffusion method to colors, the scalar error diffusion method that independently diffuses the quantization error without considering the correlation for each color and the quantization error in the vector color space considering the correlation of each color There is a vector error diffusion method that spreads.

4 is a diagram illustrating an original image and an image to which Error-Diffusion is applied according to an embodiment of the present invention.

4, an original image 410 is an 8-bit image with a gamma-corrected image. In addition, the image 420 to which Error-Diffusion is applied is a 1-bit image that has been half-toned. Here, the image 420 to which Error-Diffusion is applied is an image obtained by diffusing a quantization error due to binarization of a pixel to surrounding pixels, as described above, and has a size of 1 bit.

Therefore, since the half-toned image has a small size of 1 bit, data can be transmitted in a short time.

On the other hand, dithering is a method for expressing an image with more contrast by using a limited intensity. The goal of such dithering is to obtain high-quality images by removing artificial defects arising from differences in brightness and resolution. Therefore, most of the printing equipment currently used express only two levels of contrast, so a dithering process is required.

Again, referring to FIG. 1, the communication unit 110 may communicate with an auxiliary display device (not shown).

Here, the communication unit 110 may perform communication with an auxiliary display device (not shown) according to a wireless communication method.

Specifically, as a wireless communication method, RFID, Near Field Communication (NFC), Bluetooth, Zigbee, and Wi-Fi may be used.

RFID is a device that stores product information on a microchip and wirelessly transmits data by attaching an antenna. It is a recognition technology that can manage information of various objects such as food, animals, and objects through IC chip and wireless. It is called'electronic tag' or'smart tag','electronic label', and'wireless identification'.

NFC is a communication technology that transmits and receives various wireless data within a short distance of 10cm. As one of the radio tag (RFID) technologies, NFC is a non-contact communication technology that uses a frequency band of 13.56NHz. Because of its short communication distance, it is a short-range communication technology that attracts attention because of its relatively excellent security and low price. Both data read and write functions can be used, and it is similar to existing short-range communication technologies such as Bluetooth, but does not require setting between devices like Bluetooth.

Bluetooth is one of the short-range wireless communication standards, and refers to a technical standard that wirelessly connects and controls various electronic and information communication devices within a radius of 10 to 100m using a 2.45GHz frequency. It is possible to send and receive data at high speed using radio frequency without physical cables for communication between various digital home appliances as well as information and communication devices such as computers, printers, mobile phones and PDAs in the home or office.

Zigbee also refers to one of the IEEE 802.15.4 standards that support short-range communication, and is a technology for short-range communication and ubiquitous computing within 10-20m in wireless networking fields such as homes and offices. In other words, Zigbee is a concept of a mobile phone or wireless LAN, and a feature different from the existing technology is to transmit a small amount of information instead of minimizing power consumption.

The above-described wireless communication scheme has a common feature of low data transmission speed.

Meanwhile, the display unit 120 may display a plurality of objects. Here, the plurality of objects refers to all images, icons, etc. displayed on the display unit 120. In other words, it means anything that can be displayed, such as moving pictures, still images, music files, and icons that can run applications.

The controller 130 may convert and process data corresponding to at least one object that satisfies a preset condition among a plurality of objects into data equal to or less than a preset number of bits.

Here, the preset condition may be a condition directly set by a user or a condition corresponding to a usage history.

For example, if a user sets a mailbox icon, a text message icon, and a news icon among a plurality of objects displayed on the display unit of the main display device to be displayed on the secondary display device, the controller 130 may not only display the main display device, but also The secondary display device can also display a mailbox icon, a text message icon, and a news icon.

That is, the control unit 130 displays all of a plurality of objects including a mailbox icon, a text message icon, and a news icon on the main display device, while the secondary display device displays a mailbox icon, a text message icon, and a news icon according to the user's setting. You can display only icons.

Meanwhile, when the preset condition is a condition corresponding to the use history, the controller 130 may determine an object frequently used by the user and display only the frequently used object on the auxiliary display device.

For example, if a user frequently uses DMB, text, camera, and Internet, the controller 130 calculates the number of executions of the DMB icon, text message icon, camera icon, and Internet icon, and if it is more than a preset number, frequently used It is determined that it is an object, and the DBM icon, text message icon, camera icon, and Internet icon may be displayed on the auxiliary display device.

Also, the controller 130 may convert data corresponding to at least one object satisfying a preset condition into 1-bit or 3-bit data.

Here, when the control unit 130 converts data corresponding to one object to 1-bit data, it corresponds to a case of displaying a black and white image in the E-PAPER, and the control unit 130 The case of converting data into 3-bit data corresponds to the case of displaying a color image in E-PAPER.

Specifically, in the case of displaying a black and white image, only black and white need to be displayed, so it can be expressed as 0 and 1, so that it can be implemented with 1 bit, whereas when displaying a color image, R, G, and B must be displayed. Since 1 bit is required, it can be implemented with a total of 3 bits.

5 is a block diagram illustrating a control unit of a main display device according to an embodiment of the present invention.

Referring to FIG. 5, the controller 130 converts the gamma correction unit 510 to perform gamma correction on data corresponding to at least one object that satisfies a preset condition and the gamma-corrected data into 1 bit or 3 bits. It includes a conversion unit 520.

In particular, unlike the configuration of the E-PAPER described above in FIG. 2, in the present invention, the control unit 130 of the main display device 100 includes a gamma correction unit 510 and a conversion unit 520. The controller 130 of 100) may convert data corresponding to an object for display on a plurality of objects in advance.

Meanwhile, the conversion unit 520 may compensate for data loss that occurs when converting the gamma-corrected data into 1-bit or 3-bit data using an error-diffusion method or a dithering method.

Since the gamma correction and the error-diffusion method or the dithering method have been described above, detailed descriptions will be omitted.

The control unit 130 may convert the gamma-corrected data into data having a low number of bits and transmit the converted data to an auxiliary display device (not shown) through the communication unit 110. At this time, the control unit 130 may in advance Since the data corresponding to the object for display in the secondary display device (not shown) is converted and processed into data with a low bit number, the capacity of the data is reduced, so even in wireless communication such as NFC and Bluetooth, the data transmission speed is low Can be transmitted.

In addition, the controller 130 may control the converted data to be transmitted to an auxiliary display device (not shown) to be displayed on the auxiliary display device (not shown).

That is, the auxiliary display device (not shown) does not include a separate control unit, and the control unit 130 of the main display device 100 may control and display the auxiliary display device (not shown).

For example, if a user terminal device is used as a main display device and an E-PAPER is used as a secondary display device, the E-PAPER may be attached to the case of the user terminal device and used.

6 is a diagram illustrating a user terminal device and an E-PAPER according to an embodiment of the present invention.

6, a user terminal device 610 as a main display device, an E-PAPER 620 as a secondary display device, and a case 630 to which a user terminal device 610 and E-PAPER 620 are attached. You can see that it is.

Here, a plurality of objects may be displayed on the user terminal device 610, and some of the plurality of objects displayed on the user terminal device 610, that is, a text message icon 621, and weather information, are displayed on the E-PAPER 620. An icon 622 capable of executing an application informing of a subway line map, an icon 623 capable of executing an application informing of a subway route map, and a phone icon 624 capable of executing a phone call may be displayed.

The object displayed on the E-PAPER 620 may be determined according to a preset condition as described above.

Meanwhile, the user terminal device 610 and the E-PAPER 620 may perform communication according to a wireless communication method.

Accordingly, the user terminal device 610 performs a text message icon 621, an icon 622 capable of executing an application notifying weather information, an icon 623 capable of executing an application notifying a subway route map, and a phone call. Data corresponding to the phone icon 624 may be converted into data having a predetermined number of bits or less, and the converted data may be transmitted to the E-PAPER 620 according to a wireless communication method and displayed.

At this time, when the E-PAPER 620 expresses only black and white, the user terminal device 610 converts to 1-bit data, and when the E-PAPER 620 expresses color, the user terminal device 610 Can be converted into 3-bit data.

Meanwhile, in the above-described example, the user terminal device 610 and the E-PAPER 620 are exemplified, but are not limited thereto and may be applied to all display devices.

7 is a block diagram illustrating an auxiliary display device according to an embodiment of the present invention.

The auxiliary display device 700 includes a communication unit 710 and a display unit 720. Here, as the auxiliary display device 700, as described above, representatively, E-PAPER may be used.

The communication unit 710 may communicate with a main display device (not shown). Here, the communication unit 710 may perform communication with a main display device (not shown) according to a wireless communication method.

RFID, Near Field Communication (NFC), Bluetooth, Zigbee, and Wi-Fi may be used as a wireless communication method.

The display unit 720 may display an object corresponding to the received data when data converted into data less than a preset number of bits is received from a main display device (not shown).

Here, the data equal to or less than the preset number of bits is data corresponding to at least one object that satisfies a preset condition among a plurality of objects displayed on the main display device.

That is, as described above, the main display device (not shown) converts data corresponding to at least one object that satisfies a preset condition among a plurality of objects into data having a preset number of bits or less, and processes the secondary display device 700. ), the auxiliary display device 700 may receive data converted into data equal to or less than a preset number of bits, and display an object corresponding to the received data.

In addition, data less than or equal to a preset number of bits may be 1-bit or 3-bit data. Specifically, if data equal to or less than the preset number of bits is 1 bit, an image composed of black and white may be displayed, and if data equal to or less than the preset number of bits is 3 bits, a color image may be displayed.

Meanwhile, the display unit 720 may include a source driver and a gate driver for driving the E-PAPER, and a TCON unit (not shown) for operating the source driver and the gate driver.

Here, the TCON unit (not shown) may perform a function of controlling the TFT of the E-PAPER.

Meanwhile, the auxiliary display device 700 may or may not have a battery itself.

In particular, when the auxiliary display device 700 does not have a battery, the main display device 100 may transmit a wireless communication signal for applying a voltage to the auxiliary display device 700.

In addition, the auxiliary display device 700 does not have a separate control unit unlike the E-PAPER described above in FIG. 2. The E-PAPER in FIG. 2 includes a control unit to process the data received from the main display device into low-bit data, but the main display device 100 according to an embodiment of the present invention is preset among a plurality of objects. Since data corresponding to at least one object that satisfies the condition is converted into data having a predetermined number of bits or less and transmitted to the auxiliary display device 700, the auxiliary display device 700 does not have to have a separate control unit.

Accordingly, since the auxiliary display device 700 does not have a control unit, there is no need to directly process signals, and thus, the amount of power consumed is also reduced.

In addition, since the main display device 100 converts data into low bit data in advance, data can be transmitted to the auxiliary display device 700 within a short time even when wireless communication with a low data transmission rate is used.

8 is a diagram illustrating a display system according to an embodiment of the present invention.

The display system 800 includes a main display device 810 and an auxiliary display device 820.

The main display device 810 converts data corresponding to at least one object that satisfies a preset condition among a plurality of objects displayed on the screen into data having a predetermined number of bits or less, and converts the converted data to a secondary display. It can be transmitted to the device 820.

Here, the main display device 810 may perform gamma correction on data corresponding to at least one object satisfying a preset condition, and convert the gamma-corrected data into 1 bit or 3 bits.

In addition, the main display device 810 may compensate for data loss that occurs when the gamma-corrected data is converted into 1-bit or 3-bit data using an error-diffusion method or a dithering method.

Meanwhile, the auxiliary display device 820 may display an object corresponding to data less than or equal to a preset number of bits received from the main display device 810.

Here, the data of the sub-display apparatus 820 less than the preset number of bits received from the main display apparatus 810 is applied to at least one object that satisfies the preset condition among the plurality of objects displayed on the main display apparatus 100. This is the corresponding data.

9 is a flowchart illustrating a method of controlling a main display device according to an embodiment of the present invention.

According to the method shown in FIG. 9, a plurality of objects may be displayed (S910). Here, the plurality of objects means all images, icons, etc. to be displayed. In other words, it means anything that can be displayed, such as moving pictures, still images, music files, and icons that can run applications.

In addition, data corresponding to at least one object that satisfies a preset condition among the plurality of objects may be converted into data having a preset number of bits or less (S920).

Here, data corresponding to at least one object that satisfies a preset condition may be converted into 1-bit or 3-bit data.

In addition, gamma correction may be performed on data corresponding to at least one object satisfying a preset condition, and the gamma corrected data may be converted into 1 bit or 3 bits.

In addition, data loss that occurs when converting the gamma-corrected data into 1-bit or 3-bit data may be compensated for by using at least one of an error-diffusion method and a dithering method.

Meanwhile, the converted data may be transmitted to the auxiliary display device for display (S930).

Here, the data converted according to the wireless communication method may be transmitted to the auxiliary display device.

10 is a flowchart illustrating a method of controlling an auxiliary display device according to an embodiment of the present invention.

According to the method illustrated in FIG. 10, communication with the main display device may be performed (S1010 ).

Here, communication may be performed with the main display device according to a wireless communication method.

In addition, when data converted into data less than or equal to a preset number of bits is received from the main display device, an object corresponding to the received data may be displayed (S1020).

Here, the data equal to or less than the preset number of bits is data corresponding to at least one object that satisfies a preset condition among a plurality of objects displayed on the main display device.

In addition, data less than or equal to a preset number of bits is 1-bit or 3-bit data.

11 is a flowchart illustrating a method of controlling a display system including a main display device and an auxiliary display device according to an embodiment of the present invention.

According to the method shown in FIG. 11, the main display device converts data corresponding to at least one object that satisfies a preset condition among a plurality of objects displayed on the screen into data having a preset number of bits or less, and converts The processed data may be transmitted to the auxiliary display device (S1110).

In addition, the auxiliary display device may display an object corresponding to data of less than or equal to a preset number of bits received from the main display device (S1120).

Meanwhile, a non-transitory computer readable medium in which a program for sequentially performing the control method according to the present invention is stored may be provided.

For example, displaying a plurality of objects, converting data corresponding to at least one object that satisfies a preset condition among the plurality of objects into data having a preset number of bits or less, and secondary display of the converted data A non-transitory computer readable medium in which a program for performing a step of transmitting and displaying the device is stored may be provided.

In addition, as an example, when data converted into data having a predetermined number of bits or less from a main display device is received, a non-transitory readable medium storing a program that performs a step of displaying an object corresponding to the received data -transitory computer readable medium) may be provided.

The non-transitory readable medium refers to a medium that stores data semi-permanently and can be read by a device, not a medium that stores data for a short moment, such as a register, cache, or memory. Specifically, the above-described various applications or programs may be provided by being stored in a non-transitory readable medium such as a CD, DVD, hard disk, Blu-ray disk, USB, memory card, and ROM.

In addition, although a bus is not shown in the above-described block diagram of the display device, communication between components in the display device may be performed through a bus. In addition, each device may further include a processor such as a CPU or microprocessor that performs the various steps described above.

In addition, although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. In addition, various modifications are possible by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or prospect of the present invention.

100: main display device 110: communication unit
120: display unit 130: control unit
700: auxiliary display device 710: communication unit
720: display unit

Claims (18)

A communication unit for communicating with the auxiliary display device;
A display unit that displays a plurality of objects; And
When at least one object among the plurality of objects satisfies a preset condition, data corresponding to the at least one object is converted into data having a preset number of bits or less,
Including; a control unit for controlling to transmit and display the converted data to the auxiliary display device;
The control unit,
When the auxiliary display device displays the at least one object as a black-and-white image, data corresponding to the at least one object is converted into a first bit, and
When the secondary display device displays the at least one object as a color image, the main display device converts data corresponding to the at least one object into a third bit. delete The method of claim 1,
The control unit,
A gamma correction unit for performing gamma correction on data corresponding to at least one object that satisfies the preset condition; And
And a conversion unit for converting the gamma-corrected data into 1 bit or 3 bits. The method of claim 3,
The conversion unit,
A display apparatus, comprising: compensating for data loss occurring when the gamma-corrected data is converted into 1-bit or 3-bit data using an error-diffusion method or a dithering method. The method of claim 1,
The communication unit,
A display device, characterized in that for performing communication with the auxiliary display device according to a wireless communication method. A communication unit for communicating with the main display device; And
And a display unit for displaying an object corresponding to the received data when data converted into data of a predetermined number of bits or less is received from the main display device, and
Data less than or equal to the preset number of bits,
Data corresponding to at least one object that satisfies a preset condition among a plurality of objects displayed on the main display device,
When the at least one object is displayed as a black and white image on the display unit, data corresponding to the at least one object is data converted into first bits, and
When the at least one object is displayed as a color image on the display unit, the data corresponding to the at least one object is data converted into third bits. delete The method of claim 6,
The communication unit,
A secondary display device, characterized in that performing communication with the main display device according to a wireless communication method. A display system including a main display device and a secondary display device,
When at least one object among the plurality of objects displayed on the screen satisfies a preset condition, data corresponding to the at least one object is converted into data of a predetermined number of bits or less, and the converted data is converted into the A main display device for transmitting to the auxiliary display device; And
Including; a secondary display device for displaying an object corresponding to the data less than the predetermined number of bits received from the main display device,
The main display device,
When the auxiliary display device displays the at least one object as a black-and-white image, data corresponding to the at least one object is converted into a first bit, and
When the auxiliary display device displays the at least one object as a color image, the display system converts data corresponding to the at least one object into a third bit. In the control method of the main display device,
Displaying a plurality of objects;
Converting and processing data corresponding to the at least one object into data having a predetermined number of bits or less when at least one object among the plurality of objects satisfies a preset condition; And
Transmitting the converted data to an auxiliary display device for display; Including,
The conversion processing step,
When the auxiliary display device displays the at least one object as a black-and-white image, data corresponding to the at least one object is converted into a first bit, and
When the auxiliary display device displays the at least one object as a color image, a control method for converting and processing data corresponding to the at least one object into a third bit. delete The method of claim 10,
The conversion processing step,
And performing gamma correction on data corresponding to at least one object that satisfies the preset condition, and converting the gamma-corrected data into 1 bit or 3 bits. The method of claim 12,
The conversion processing step,
A control method, comprising compensating for data loss that occurs when the gamma-corrected data is converted into 1-bit or 3-bit data using at least one of an error-diffusion method and a dithering method. The method of claim 10,
Transmitting the converted data to an auxiliary display device for display,
And transmitting the converted data to the auxiliary display device according to a wireless communication method. In the control method of the auxiliary display device,
Communicating with the main display device; And
When data converted into data having a predetermined number of bits or less is received from the main display device, displaying an object corresponding to the received data; and
Data less than or equal to the preset number of bits,
Data corresponding to at least one object that satisfies a preset condition among a plurality of objects displayed on the main display device,
When the at least one object is displayed as a black and white image in the auxiliary display device, data corresponding to the at least one object is data converted into a first bit,
When the at least one object is displayed as a color image on the auxiliary display device, the data corresponding to the at least one object is data converted into third bits. delete The method of claim 15,
The step of performing the communication,
And performing communication with the main display device according to a wireless communication method. In the control method of a display system including a main display device and a secondary display device,
When at least one object among the plurality of objects displayed on the screen satisfies a preset condition, data corresponding to the at least one object is converted into data of a predetermined number of bits or less, and the converted data is converted into the Transmitting to an auxiliary display device; And
Displaying, by the auxiliary display device, an object corresponding to data of less than or equal to the predetermined number of bits received from the main display device; and
The conversion process by the main display device includes:
When the auxiliary display device displays the at least one object as a black-and-white image, data corresponding to the at least one object is converted into a first bit, and
When the auxiliary display device displays the at least one object as a color image, a control method for converting and processing data corresponding to the at least one object into a third bit.

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