Display device

Abstract

A display device according to an embodiment of the present disclosure may include: a power source; a display panel configured to output an image; a backlight unit including a plurality of unit blocks providing light to the display panel, each of the plurality of unit blocks including a plurality of LEDs; and a backlight dimming controller configured to control light output from the backlight unit to correspond to an image output through the display panel, in which an entire area of the display panel is divided into a first partial area including a plurality of first unit blocks and a second partial area including a plurality of second unit blocks, the power supply is configured to supply a first driving voltage to a first cell block in the first local region, and supply a second driving voltage different from the first driving voltage to a second cell block in the second local region.

Description

Technical Field

[0001] The present disclosure relates to a display device, and more particularly, to a display device that performs local dimming. Background Art

[0002] An active matrix liquid crystal display device uses a thin film transistor (hereinafter referred to as "TFT") as a switching element to display moving images.

[0003] Compared with cathode ray tubes (CRTs), liquid crystal display devices can be manufactured in a smaller size, so they are used not only in portable information devices, office equipment, and display devices such as computers, but also in televisions. Therefore, liquid crystal display devices are rapidly replacing CRTs.

[0004] A transmissive liquid crystal display device, which occupies most liquid crystal display devices, modulates light from a backlight unit by controlling an electric field applied to a liquid crystal layer to display an image.

[0005] Meanwhile, a backlight dimming method has been proposed to reduce power consumption of a backlight unit. Local dimming is one of the backlight dimming methods, and contrast can be improved by locally controlling the brightness of a display surface within one frame period.

[0006] The local dimming method can be a method for separating input image data according to virtual blocks divided in a matrix form on a display screen of a liquid crystal display panel, deriving a representative value of the input image data of each block, and adjusting the dimming value of each block according to the representative value of each block to control the brightness of the light source of the backlight unit of each block.

[0007] Traditionally, all unit blocks are arranged in a constant size. To increase dimming resolution, it is advantageous to adopt a smaller unit block size.

[0008] However, when the size of the unit block becomes smaller, the LEDs must be arranged more densely, which increases the number of LEDs, resulting in increased manufacturing costs and power consumption, as well as increased heat generation.

[0009] On the contrary, when the size of the unit block increases, the resolution decreases, which causes a problem in that the contrast of the peripheral portion of the image decreases.

[0010] Furthermore, it is possible to divide the size of the unit block into smaller fragments while maintaining the total number of LEDs, but in this case, the number of LEDs in the unit block becomes smaller, resulting in reduced resolution. Summary of the invention Technical issues

[0011] The present disclosure aims to reduce power consumption and improve resolution and contrast by implementing smaller unit blocks for dimming in areas that are considered as primary areas by users.

[0012] An object of the present disclosure is to implement unit blocks of different sizes in a central area and an outer area outside the central area of ​​a display panel. Technical Solution

[0013] A display device according to an embodiment of the present disclosure may include: a power supply; a display panel configured to output an image; a backlight unit including a plurality of unit blocks providing light to the display panel, each of the plurality of unit blocks including a plurality of LEDs; and a backlight dimming controller configured to control the light output from the backlight unit to correspond to an image output through the display panel, wherein an entire area of ​​the display panel is divided into a first local area including a plurality of first unit blocks and a second local area including a plurality of second unit blocks, wherein the power supply is configured to supply a first driving voltage to a first unit block in the first local area, and to supply a second driving voltage different from the first driving voltage to a second unit block in the second local area. Beneficial Effects

[0014] According to the present disclosure, power consumption can be saved by reducing the number of LEDs, compared with a case where the entire screen area is composed of unit blocks of the same size.

[0015] Furthermore, by designing the unit block of the central area perceived by the viewer to be small in size, not only the resolution is increased but also the contrast of the peripheral area of ​​the displayed image is improved, thereby improving the picture quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram showing a display device according to an embodiment of the present invention.

[0017] Figure 2 yes Figure 1 An example block diagram showing the inside of the device is shown in .

[0018] Figure 3 yes Figure 2 An example block diagram of the controller interior is shown in Figure 1.

[0019] Figure 4 yes Figure 2 A block diagram of the power supply and display internals.

[0020] Figure 5 is an example showing the arrangement of light sources in a liquid crystal display panel and a direct type backlight unit.

[0021] Figure 6is a schematic diagram showing a case where each of a plurality of unit blocks corresponding to a screen has the same size according to the prior art.

[0022] Figure 7 and Figure 8 2 is a schematic diagram illustrating a case where a unit block of each of a plurality of partial areas constituting a screen has a different size according to an embodiment of the present disclosure.

[0023] Fig. 9 is a schematic diagram illustrating a configuration of a unit block of a screen with a dual structure according to an embodiment of the present disclosure.

[0024] Fig. 10A and Fig. 10B It is used to explain the Fig. 9 Schematic diagram of the dual structure providing driving voltage and dimming signal to each local area.

[0025] Fig.11 is a schematic diagram illustrating a configuration of a unit block of a screen with a dual structure according to another embodiment of the present disclosure.

[0026] Fig. 12A and Fig. 12B It is used to explain the Fig.11 Schematic diagram of the dual structure providing driving voltage and dimming signal to each local area.

[0027] Fig.13 is a schematic diagram illustrating a configuration of a unit block of a screen having a dual structure according to another embodiment of the present disclosure.

[0028] Fig.14 It is used to explain the Fig.13 Schematic diagram of the dual structure providing driving voltage and dimming signal to each local area.

[0029] Fig.15 is a schematic diagram illustrating a screen with a dual structure according to another embodiment of the present disclosure.

[0030] Fig.16A and Fig. 16B It is used to explain the Fig.15 A schematic diagram of a driving voltage and a dimming signal provided to each local area in an embodiment. DETAILED DESCRIPTION

[0031] Hereinafter, embodiments related to the present disclosure will be described in detail with reference to the accompanying drawings. The suffixes "module" and "unit" of components used in the following description are designated or mixed in consideration of convenience in writing the specification, and have no special meaning or role by themselves.

[0032] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0033] The suffixes “module” and “unit” of components used in the following description are designated or mixed in consideration of the convenience in writing the specification, and have no special meaning or role by themselves.

[0034] It will be understood that although the terms first, second, etc. may be used herein to describe various elements of the present invention, these terms are only used to distinguish one element from another, and the nature, order or sequence of the corresponding elements are not limited by these terms.

[0035] Unless the context clearly indicates otherwise, a singular expression may include a plural expression.

[0036] It can be understood that the terms “comprise”, “include”, etc. used in this specification indicate that there are several components or several steps, and some components or steps may not be included, or other components or steps may be included.

[0037] Figure 1 is a schematic diagram showing a display device according to an embodiment of the present invention.

[0038] Referring to the drawings, the display apparatus 100 includes a display 180 .

[0039] On the other hand, the display 180 is implemented by one of various panels, for example, a liquid crystal display panel (LCD panel), an organic light emitting diode (OLED) panel (OLED panel), and an inorganic light emitting diode (ILED) panel (ILED panel).

[0040] According to the present invention, it is assumed that the display 180 includes a liquid crystal display panel (LCD panel).

[0041] on the other hand, Figure 1 Examples of the display device 100 include a monitor, a television, a tablet computer, a mobile terminal, etc.

[0042] Figure 2 yes Figure 1 An example block diagram showing the inside of the device is shown in .

[0043] Reference Figure 2 , the display device 100 may include a broadcast receiver 130 , an external device interface 135 , a storage device 140 , a user input interface 150 , a controller 170 , a wireless communication interface 173 , a display 180 , an audio output interface 185 , and a power supply 190 .

[0044] The broadcast receiver 130 may include a tuner 131 , a demodulator 132 , and a network interface 133 .

[0045] The tuner 131 may select a specific broadcast channel according to a channel selection command. The tuner 131 may receive a broadcast signal for the selected specific broadcast channel.

[0046] The demodulator 132 may separate a received broadcast signal into a video signal, an audio signal, and a broadcast program related data signal, and restore the separated video signal, audio signal, and data signal into an output-usable form.

[0047] The network interface 133 may provide an interface for connecting the display device 100 to a wired / wireless network including an Internet network. The network interface 133 may transmit or receive data to or from another user or another electronic device through an accessed network or another network linked to the accessed network.

[0048] The network interface 133 can access a predetermined web page through an accessed network or another network linked to the accessed network. In other words, it can access a predetermined web page through a network to send data to or receive data from a corresponding server.

[0049] Then, the network interface 133 can receive content or data provided by a content provider or a network operator. That is, the network interface 133 can receive content provided by a content provider or a network provider through a network, such as movies, advertisements, games, VOD, and broadcast signals and information related thereto.

[0050] In addition, the network interface 133 may receive firmware update information and update files provided by a network operator, and transmit the data to the Internet or a content provider or a network operator.

[0051] The network interface 133 can select and receive a desired application from among applications open to the air through a network.

[0052] The external device interface 135 may receive an application or an application list in a neighboring external device and transfer it to the controller 170 or the storage 140 .

[0053] The external device interface 135 may provide a connection path between the display device 100 and the external device. The external device interface 135 may receive at least one of an image and an audio output from an external device wirelessly or wired to the display device 100, and transmit it to the controller. The external device interface 135 may include a plurality of external input terminals. The plurality of external input terminals may include an RGB terminal, at least one high-definition multimedia interface (HDMI) terminal, and a component terminal.

[0054] An image signal of an external device input through the external device interface 135 may be output through the display 180 . A sound signal of an external device input through the external device interface 135 may be output through the audio output interface 185 .

[0055] The external device connectable to the external device interface 135 may be one of a set-top box, a Blu-ray player, a DVD player, a game console, a speaker, a smart phone, a PC, a USB memory, and a home theater system, but this is just an example.

[0056] Furthermore, some content data stored in the display device 100 may be transmitted to users or electronic devices selected from other users or other electronic devices pre-registered in the display device 100 .

[0057] The storage device 140 can store the image, voice or data signal of the signal processing stored by the program so as to facilitate the processing and control of each signal in the controller 170 .

[0058] In addition, the storage device 140 may perform a function of temporarily storing an image, voice, or data signal output from the external device interface 135 or the network interface 133, and may store information on a predetermined image through a channel memory function.

[0059] The storage 140 may store applications or application lists input from the external device interface 135 or the network interface 133 .

[0060] The display apparatus 100 may play content files (eg, video files, still image files, music files, document files, application files, etc.) stored in the storage device 140 and provide them to the user.

[0061] The user input interface 150 may transmit a signal input by the user to the controller 170 or transmit a signal from the controller 170 to the user. For example, the user input interface 150 may receive or process a control signal (such as power on / off, channel selection, screen setting) from the remote controller 200, or transmit a control signal from the controller 170 to the remote controller 200 according to various communication methods (such as Bluetooth, ultra-wideband (WB), ZigBee, radio frequency (RF), and infrared).

[0062] In addition, the user input interface 150 may transmit a control signal input from a local key (not shown), such as a power key, a channel key, a volume key, and a setting key, to the controller 170 .

[0063] The image signal image-processed in the controller 170 may be input to the display 180 and displayed as an image corresponding to the corresponding image signal. In addition, the image signal image-processed in the controller 170 may be input to an external output device through the external device interface 135.

[0064] The voice signal processed in the controller 170 may be output to the audio output interface 185. In addition, the voice signal processed in the controller 170 may be input to an external output device through the external device interface 135.

[0065] Besides, the controller 170 may control overall operations in the display device 100 .

[0066] In addition, the controller 170 may control the display device 100 through a user command input through the user input interface 150 or an internal program, and download a desired application or an application list to the display device 100 when accessing a network.

[0067] The controller 170 may output channel information selected by the user and the processed image or voice signal through the display 180 or the audio output interface 185 .

[0068] In addition, according to an external device image playback command received through the user input interface 150, the controller 170 can output an image signal or voice signal of an external device (such as a camera or camcorder) input through the external device interface 135 through the display 180 or the audio output interface 185.

[0069] In addition, the controller 170 may control the display 180 to display an image, and control a broadcast image input through the tuner 131, an external input image input through the external device interface 135, an image input through a network interface, or an image stored in the storage device 140 to be displayed on the display 180. In this case, the image displayed on the display 180 may be a still image or a video, and may be a 2D image or a 3D image.

[0070] In addition, the controller 170 can play content stored in the display device 100, received broadcast content, and external input content input from the outside, and these contents can be in various formats such as broadcast images, external input images, audio files, still images, accessed web page screens, and document files.

[0071] In addition, the wireless communication interface 173 can perform wired or wireless communication with an external electronic device. The wireless communication interface 173 can perform short-range communication with an external device. To this end, the wireless communication interface 173 can be used by using Bluetooth TMThe wireless communication interface 173 may support short-range communication by at least one of the following technologies: RFID, infrared data association (IrDA), ultra-wideband (UWB), ZigBee, near field communication (NFC), wireless fidelity (Wi-Fi), Wi-Fi direct, and wireless universal serial bus (USB). The wireless communication interface 173 may support wireless communication between the display device 100 and a wireless communication system, between the display device 100 and another display device 100, or between a network including the display device 100 and another display device 100 (or an external server) through a wireless local area network. The wireless local area network may be a wireless personal area network.

[0072] Herein, the other display device 100 may be a mobile terminal, such as a wearable device (e.g., a smart watch, smart glasses, and a head mounted display (HMD)) or a smart phone, which can exchange data (or work in conjunction) with the display device 100. The wireless communication interface 173 can detect (or identify) the wearable devices around the display device 100. In addition, if the detected wearable device is a device that is authenticated to communicate with the display device 100, the controller 170 can transmit at least part of the data processed in the display device 100 to the wearable device through the wireless communication interface 173. Therefore, the user of the wearable device can use the data processed in the display device 100 through the wearable device.

[0073] The display 180 may convert an image signal, a data signal, or an OSD signal processed in the controller 170 or an image signal or a data signal received by the external device interface 135 into R, G, and B signals to generate a driving signal.

[0074] also, Figure 2 The display device 100 shown is only one embodiment of the present invention, and therefore, some of the components shown can be integrated, added or omitted according to the specification of the display device 100 actually implemented.

[0075] That is, if necessary, two or more components can be integrated into one component, or one component can be divided into two or more components and configured. In addition, the functions performed by each block are to describe the specific embodiments of the present invention and their specific operations or devices, and do not limit the scope of the present invention.

[0076] According to another embodiment of the present invention, Figure 2 Differently, the display device 100 may receive an image through the network interface 133 or the external device interface 135 and play the image without including the tuner 131 and the demodulator 132 .

[0077] For example, the display device 100 may be divided into an image processing device such as a set-top box for receiving broadcast signals or contents according to various network services and a content playback device for playing contents input from the image processing device.

[0078] In this case, the operating method of the display device according to the embodiment of the present invention described below can be referred to Figure 2 The content playback device 180 and the audio output interface 185 are described as being performed by one of the display device, the image processing device (such as a separate set-top box), and the content playback device (including the display 180 and the audio output interface 185).

[0079] The audio output interface 185 receives the audio processing signal from the controller 170 and outputs sound.

[0080] The power supply 190 supplies corresponding power to the entire display device 100. In particular, the power supply 190 supplies power to the controller 170 which may be implemented in the form of a system on chip (SOC), the display 180 for displaying images, and the audio output interface 185 for outputting audio.

[0081] Specifically, the power supply 190 may include a converter for converting AC power into DC power, and a DC / DC converter for converting the level of the DC power.

[0082] The remote controller 200 transmits the user input to the user input interface 150. To this end, the remote controller 200 may use Bluetooth, radio frequency (RF) communication, infrared (IR) communication, ultra-wideband (UWB), ZigBee, etc. In addition, the remote controller 200 may receive a video, audio, or data signal output from the user input interface 150, and display the video, audio, or data signal or output sound.

[0083] Figure 3 yes Figure 2 An example block diagram of the controller interior is shown in Figure 1.

[0084] For description with reference to the drawings, the controller 170 according to an embodiment of the present invention includes a demultiplexer 310, an image processor 320, a processor 330, an OSD generator 340, a mixer 345, a frame rate converter 350, and a formatter 360. In addition, an audio processor (not shown) and a data processor (not shown) are also included.

[0085] The demultiplexer 310 demultiplexes the stream input. For example, when an MPEG-2TS is input, the MPEG-2TS is demultiplexed into an image signal, an audio signal, and a data signal. At this time, the stream signal input to the demultiplexer 310 is a stream signal output from the tuner 110, the demodulator 120, or the external device interface 135.

[0086] The image processor 320 performs image processing on the demultiplexed image signal. To this end, the image processor 320 includes an image decoder 325 or a scaler 335.

[0087] The image decoder 325 decodes the image signal resulting from the demultiplexing. The scaler 335 performs scaling in such a manner that the resolution of the image signal resulting from the decoding makes it possible for the image signal to be output to the display 180.

[0088] Examples of the image decoder 325 may include decoders that conform to various specifications. For example, examples of the image decoder 325 include a decoder for MPEG-2, a decoder for H.264, a 3D image decoder for color images and depth images, a decoder for multi-point images, and the like.

[0089] The processor 330 controls the overall operation within the display device 100 or the controller 170. For example, the processor 330 controls the tuner 110 in such a manner that the tuner 110 performs selection (tuning) of an RF broadcast corresponding to a channel selected by a user or an already stored channel.

[0090] Furthermore, the processor 330 controls the display apparatus 100 using a user command input through the user input interface 150 or an internal program.

[0091] Furthermore, the processor 330 performs control of data transmission with the network interface 133 or the external device interface 135 .

[0092] Furthermore, the processor 330 controls the operation of each demultiplexer 310 , the image processor 320 , the OSD generator 340 , etc. within the controller 170 .

[0093] The OSD generator 340 generates an OSD signal according to a user input or by itself. For example, based on a user input signal, a signal for displaying various information in a graphic or text format on the screen of the display 180 is generated. The generated OSD signal includes various data for a user interface screen of the display device 100, various menu screens, widgets, icons, etc. In addition, the OSD generated signal includes a 2D object or a 3D object.

[0094] In addition, based on the pointing signal input from the remote controller 200, the OSD generator 340 generates a pointer that may be displayed on the display. Specifically, the pointer is generated in the pointing signal processor, and the OSD generator 340 includes the pointing signal processor (not shown). Of course, it is also possible that the pointing signal processor is not provided in the OSD generator 340, but is provided separately (not shown).

[0095] The mixer 345 mixes the OSD signal generated in the OSD generator 340 and the image signal generated by image processing and decoding in the image processor 320. The mixed image signal is provided to the frame rate converter 350.

[0096] The frame rate converter (FRC) 350 converts the frame rate of the image input. On the other hand, the frame rate converter 350 may output the image as it is without converting the frame rate alone.

[0097] On the other hand, the formatter 360 converts the format of the image signal input into a format in which the image signal is displayed on a display, and outputs an image resulting from the format conversion thereof.

[0098] The formatter 360 changes the format of the image signal, for example, changes the format of the 3D image signal to any one of the following 3D formats: side-by-side format, top-bottom format, frame sequential format, interlaced format, and checkbox format.

[0099] On the other hand, the audio processor (not shown) within the controller 170 performs audio processing on the demultiplexed audio signal. To this end, the audio processor (not shown) includes various decoders.

[0100] Furthermore, an audio processor (not shown) within the controller 170 performs processing on bass, treble, volume adjustment, and the like.

[0101] The data processor (not shown) in the controller 170 performs data processing on the demultiplexed data signal. For example, in the case where the demultiplexed data signal is a coded data signal, the data signal is decoded. The coded data signal is an electronic program guide including broadcast information such as the start time and end time of the broadcast program to be broadcasted in each channel.

[0102] on the other hand, Figure 3 The block diagram of the controller 170 shown in FIG. 1 is a block diagram of an embodiment of the present invention. Each constituent element in the block diagram is integrated, added, or omitted according to the description of the image display controller 170 actually implemented.

[0103] In particular, the frame rate converter 350 and the formatter 360 may be provided separately and independently of each other, or may be provided separately as one module without being provided in the controller 170 .

[0104] Figure 4 yes Figure 2 A block diagram of the power supply and display internals.

[0105] 1 , a display 180 based on a liquid crystal panel (LCD panel) may include a liquid crystal display panel 210 , a driving circuit 230 , a backlight unit 250 , and a backlight dimming controller 510 .

[0106] In order to display an image, the liquid crystal display panel 210 includes: a first substrate, in which a plurality of gate lines GL and data lines DL are arranged to cross each other in a matrix shape, and thin film transistors and pixel electrodes connected to the thin film transistors are formed at the intersections; a second substrate having a common electrode; and a liquid crystal layer formed between the first substrate and the second substrate.

[0107] The driving circuit 230 responds to Figure 2 The controller 170 supplies control signals and data signals to drive the liquid crystal display panel 210. To this end, the driving circuit 230 includes a timing controller 232, a gate driver 234, and a data driver 236.

[0108] The timing controller 232 receives control signals, R, G, B data signals, a vertical synchronization signal Vsync, etc. from the controller 170 , controls the gate driver 234 and the data driver 236 in response to the control signals, and rearranges and provides the R, G, B data signals to the data driver 236 .

[0109] By controlling the gate driver 234 , the data driver 236 , and the timing controller 232 , the scan signal and the image signal are supplied to the liquid crystal display panel 210 through the gate lines GL and the data lines DL.

[0110] The backlight unit 250 supplies light to the liquid crystal display panel 210. To this end, the backlight unit 250 may include a plurality of light sources 252, a scan driver 254 controlling scan driving of the light sources 252, and a light source driver 256 turning on / off the light sources 252.

[0111] A predetermined image is displayed using light emitted from the backlight unit 250 , and light transmittance of the liquid crystal layer is adjusted by an electric field generated between a pixel electrode and a common electrode of the liquid crystal display panel 210 .

[0112] The power supply 190 can supply a common electrode voltage Vcom to the liquid crystal display panel 210 and a gamma voltage to the data driver 236. In addition, the power supply 190 can supply a driving power for driving the light source 252 to the backlight unit 250.

[0113] At the same time, the backlight unit 250 may be divided and driven into a plurality of blocks. The controller 170 may control the display 180 to perform local dimming by setting a dimming value for each block. In detail, the timing controller 232 may output the input image data RGB to the backlight dimming controller 510, and the backlight dimming controller 510 may calculate a dimming value for each of the plurality of blocks based on the input image data RGB received from the timing controller 232.

[0114] Figure 5 is an example showing the arrangement of light sources in a liquid crystal display panel and a direct type backlight unit.

[0115] like Figure 5 As shown, the liquid crystal display panel 210 can be divided into a plurality of virtual blocks. Figure 5 The LCD panel 210 is evenly divided into 16 blocks BL1 to BL16, but it should be noted that the LCD panel 210 is not limited thereto. Each block may include a plurality of pixels.

[0116] The backlight unit 250 may be implemented as any one of an edge type and a direct type.

[0117] The edge type backlight unit 250 has a structure in which a plurality of optical sheets and a light guide plate are stacked under the liquid crystal display panel 210 and a plurality of light sources are placed on the side of the light guide plate.

[0118] The direct type backlight unit 250 has a structure in which a plurality of optical sheets and a diffusion plate are stacked under the liquid crystal display panel 210 and a plurality of light sources are placed under the diffusion plate.

[0119] like Figure 5 As shown, when the backlight unit 250 is a direct-type backlight unit, it is divided into blocks BL1 to BL16 corresponding to the liquid crystal display panel 210. In this case, the brightness of the light entering the first block BL2 of the light source array can be adjusted using the light source 252 included in the first block BL1 of the backlight unit 250, which is disposed at a position corresponding to the first block BL1 of the liquid crystal display panel 210.

[0120] The light source 252 may be a point light source, such as a light emitting diode (LED). The light source 252 turns on and off in response to a light source drive signal LDS from the light source driver 256. The light source 252 may adjust the intensity of the light according to the amplitude of the light source drive signal LDS, and may adjust the on-time according to the pulse width. The brightness of the light output from the light source 252 may be adjusted according to the light source drive signal LDS.

[0121] Based on the block dimming value input from the backlight dimming controller 510, the light source driver 256 can generate and output the light source driving signal LDS to the light source 252. The block dimming value, ie, the value for performing local dimming, may be the brightness of light output from the light source 252.

[0122] Figure 6 is a schematic diagram showing a case where each of a plurality of unit blocks corresponding to a screen has the same size according to the prior art.

[0123] The brightness of each of the plurality of unit blocks 601 may be controlled one by one by the backlight unit 250 .

[0124] The screen display area 610 is an area where an image is output, and the backlight unit on the area 630 is an area where the backlight unit 250 provides light to output the image of the screen display area 610 .

[0125] like Figure 6 As shown, when the size of the unit blocks is the same, the backlight unit on area 630 becomes larger than the screen display area 610, and provides light to more than necessary unit blocks (12 unit blocks). Therefore, power consumption is wasted, and the contrast of the peripheral area of ​​the screen display area 610 is reduced.

[0126] Figure 7 and Figure 8 2 is a schematic diagram illustrating a case where a unit block of each of a plurality of partial areas constituting a screen has a different size according to an embodiment of the present disclosure.

[0127] Hereinafter, a unit block is a block corresponding to a unit region of the display panel 210 , and may be a block supplying light to the unit region of the display panel 210 .

[0128] In particular, Figure 7 is a schematic diagram showing a case where a screen is divided into two partial areas, Figure 8 is a schematic diagram illustrating a situation where the screen is divided into three partial areas.

[0129] Reference Figure 7 , the entire screen area may be divided into a first partial area 710 and a second partial area 730 .

[0130] The first partial region 710 may include a plurality of first unit blocks, and each of the plurality of first unit blocks may have the same size.

[0131] The second partial area 730 may include a plurality of second unit blocks. Each of the plurality of second unit blocks may have the same size.

[0132] The first partial area 710 may be located at the center of the screen, and the second partial area 730 may be located at the outside of the screen. That is, in the entire area, the outer area except the first partial area 710 may be the second partial area 730.

[0133] The second local area 730 may be positioned to surround the first local area 710 .

[0134] The first local area 710 may be an important area that is mainly perceived by the viewer, and the second local area 730 may be an unimportant area that the viewer does not pay much attention to.

[0135] The size of the first unit block 711 may be smaller than the size of the second unit block 731. Figure 6 The sizes of the unit blocks 601 are the same.

[0136] exist Figure 7 In the embodiment, the backlight units on the screen display area 610 and area 750 can be the same.

[0137] Since the size of the first unit block 711 constituting the first partial area 710 becomes smaller than Figure 6 The size of the unit block 601, therefore the size of the backlight unit on the area 750 (6 unit blocks) can also be smaller.

[0138] That is to say, according to Figure 7 An embodiment of Figure 6 Compared to the prior art, the number of unit blocks that must be turned on to supply light to the screen display area 610 is reduced from 12 to 6.

[0139] Therefore, waste of power consumption is prevented, and since the sizes of the backlight units on the screen display area 610 and the area 750 become the same, the resolution and contrast of the peripheral area of ​​the screen display area 610 can also be improved.

[0140] Reference Figure 8 , the entire screen area may be divided into a fourth partial area 810 , a fifth partial area 830 , and a sixth partial area 850 .

[0141] The fourth local area 810 may include a plurality of fourth cell blocks, the fifth local area 830 may include a plurality of fifth cell blocks, and the sixth local area 850 may include a plurality of sixth cell blocks.

[0142] Each of the plurality of fourth unit blocks may have the same size.

[0143] Each of the plurality of fifth unit blocks may have the same size.

[0144] Each of the plurality of sixth unit blocks may have the same size.

[0145] The fourth local area 810 is located at the center of the screen, the fifth local area 830 surrounds the fourth local area 810 , and the sixth local area 850 surrounds the fifth local area 830 .

[0146] The size of the fourth unit block 811 may be smaller than that of the fifth unit block 831 .

[0147] The size of the fifth unit block 831 may be smaller than that of the sixth unit block 851 .

[0148] In other words, as the cell blocks move outward from the center of the screen, their size may increase.

[0149] Fig. 9 is a schematic diagram illustrating a configuration of a unit block of a screen having a dual structure according to an embodiment of the present disclosure.

[0150] Reference Fig. 9 , the screen can have something like Figure 7 The dual structure of the embodiment.

[0151] That is, the entire screen area may include the first partial area 710 and the second partial area 730 , and the second partial area 730 is an area other than the first partial area 710 .

[0152] Each of the plurality of first unit blocks 711 included in the first partial area 710 may include 9 light emitting diodes (LEDs).

[0153] The first unit block 711 may include nine LEDs 901 arranged at regular intervals. Intervals between adjacent LEDs arranged in a horizontal direction of the first unit block 711 may be equal to each other, and intervals between adjacent LEDs arranged in a vertical direction of the first unit block 711 may be equal to each other.

[0154] Each of the plurality of second unit blocks 731 included in the second partial area 730 may include 16 LEDs 903 .

[0155] The intervals between adjacent LEDs arranged in the horizontal direction of the second unit block 731 are the same, and the intervals between adjacent LEDs arranged in the vertical direction of the second unit block 731 are the same.

[0156] Furthermore, a spacing between two horizontally or vertically adjacent LEDs of the first unit block 711 may be the same as a spacing between two horizontally or vertically adjacent LEDs of the second unit block 731 .

[0157] Therefore, according to Fig. 9 In the case of the dual structure of the embodiment, the spacing between adjacent LEDs of the first unit block 711 is the same as the spacing between adjacent LEDs of the second unit block 731, but the number of LEDs included in the first unit block 711 can be less than the number of LEDs included in the second unit block 731.

[0158] Therefore, compared with a case where the entire screen area is composed of unit blocks of the same size, it is possible to reduce the number of LEDs and save power consumption.

[0159] Furthermore, by designing the unit blocks in the central area perceived by the viewer to be small in size, not only the resolution is increased but also the contrast of the peripheral area of ​​the displayed image is improved, thereby improving the picture quality.

[0160] Fig. 10A and Fig. 10B It is used to explain the Fig. 9 Schematic diagram of the dual structure providing driving voltage and dimming signal to each local area.

[0161] Reference Fig. 10A , the power supply 190 can supply the first driving voltage (VLED_A) to the first unit block 711 and the second driving voltage (VLED_B) to the second unit block 731 .

[0162] The magnitude of the second driving voltage (VLED_B) may be greater than the magnitude of the first driving voltage (VLED_A).

[0163] like Fig. 9 As shown, the first unit block 711 includes 9 LEDs, and the second unit block 731 includes 16 LEDs, and thus the magnitude of the driving voltage supplied to each unit block may vary.

[0164] For example, refer to Fig. 10B When the voltage supplied to one LED is 5.7V, the first driving voltage (VLED_A) supplied to the first unit block 711 is 51.3V (9×5.7), and the second driving voltage (VLED_B) supplied to the second unit block 731 is 91.2V (16×5.7).

[0165] As such, due to the size difference between the first unit block 711 and the second unit block 731 , the supplied driving voltage may also be supplied in a different manner.

[0166] Meanwhile, since the number of LEDs included in the first unit block 711 is smaller than the number of LEDs included in the second unit block 731, the brightness is reduced and brightness compensation is required.

[0167] The backlight dimming controller 510 may calculate the amount of brightness reduced due to the reduction in the number of LEDs in the first unit block 711 .

[0168] The backlight dimming controller 510 may calculate a brightness compensation amount corresponding to the reduced number of LEDs in the first unit block 711. For example, Fig. 9 As shown, when the number of LEDs in the first unit block 711 is 9 and the number of LEDs in the second unit block 731 is 16, the backlight dimming controller 510 can calculate the brightness compensation amount corresponding to the 7 LEDs.

[0169] The backlight dimming controller 510 may pre-store a unit brightness compensation amount corresponding to one LED. A memory (not shown) or storage device 140 included in the backlight dimming controller 510 or provided separately may store a unit brightness compensation amount corresponding to one LED in advance.

[0170] The backlight dimming controller 510 can calculate the brightness compensation amounts corresponding to the 7 LEDs using the stored unit brightness compensation amounts.

[0171] The backlight dimming controller 510 may store the brightness compensation amount corresponding to each unit block in a memory in advance. The memory may be included in the backlight dimming controller 510 or provided separately.

[0172] The backlight dimming controller 510 may read the brightness compensation amount of each unit block from the memory, and transmit a dimming signal reflecting the read brightness compensation amount to the backlight unit 500. Therefore, the brightness of each unit block can be compensated.

[0173] For example, the backlight dimming controller 510 may read the brightness compensation amount of the first unit block 711 from the memory, and transmit a first dimming signal reflecting the read brightness compensation amount to the backlight unit 500 .

[0174] In another embodiment, the backlight dimming controller 510 may calculate a first brightness amount corresponding to the size of the first unit block 711 , and calculate a second brightness amount corresponding to the size of the second unit block 731 .

[0175] The backlight dimming controller 510 may obtain a value as the brightness compensation amount by subtracting the first brightness amount from the second brightness amount.

[0176] The backlight dimming controller 510 may adjust a dimming curve of each of the plurality of first unit blocks included in the first partial area 710 according to the calculated brightness compensation amount.

[0177] The dimming curve may be a curve representing the dimming value characteristics of the unit block. The horizontal axis of the dimming curve may be a grayscale value from 0 to 255, and the vertical axis may be a dimming value from 0% to 100%.

[0178] The backlight dimming controller 510 may generate a first dimming signal reflecting the calculated brightness compensation amount and transmit the generated first dimming signal to the backlight unit 250 .

[0179] The first dimming signal may include a dimming value for controlling each of the plurality of first unit blocks.

[0180] The backlight dimming controller 510 may adjust the dimming curve of each of the plurality of first unit blocks to reflect the brightness compensation amount (brightness increase amount). The backlight dimming controller 510 may adjust the dimming curve so that the dimming value increases compared to the same grayscale value.

[0181] The backlight dimming controller 510 generates a second dimming signal and transmits the second dimming signal to the backlight unit 510 .

[0182] The second dimming signal may include a dimming value for controlling each of the plurality of second unit blocks.

[0183] Fig.11 is a schematic diagram illustrating a configuration of a unit block of a screen with a dual structure according to another embodiment of the present disclosure.

[0184] Reference Fig.11 , the screen can have Figure 7 The dual structure of the embodiment.

[0185] That is, the entire screen area may include the first partial area 710 and the second partial area 730 , and the second partial area 730 is an area other than the first partial area 710 .

[0186] Each of the first unit blocks 1110 included in the first partial area 710 may include 16 LEDs 1111 .

[0187] Each of the second unit blocks 731 included in the second local area 730 may include 16 LEDs 903 .

[0188] The number of LEDs included in the first unit block 1110 may be the same as the number of LEDs included in the second unit block 731 .

[0189] The intervals between two adjacent LEDs included in the first unit block 1110 in the horizontal or vertical direction are the same.

[0190] The intervals between two adjacent LEDs included in the second unit block 731 in the horizontal or vertical direction are the same.

[0191] A spacing between two horizontally or vertically adjacent LEDs of the first unit block 1110 may be smaller than a spacing between two horizontally or vertically adjacent LEDs of the second unit block 731 .

[0192] That is, the distance between two adjacent LEDs is reduced while maintaining the number of LEDs in the first unit block 1110 , so that the size of the block can be reduced.

[0193] Therefore, according to Fig.11 In the case of the dual structure of the embodiment, the number of LEDs included in the first unit block 1110 is the same as the number of LEDs included in the second unit block 731, but the number of LEDs included in the first unit block 1110 may be smaller than the spacing between adjacent LEDs of the second unit block 731.

[0194] In this way, by designing the unit block in the central area perceived by the viewer to be small in size, not only the resolution can be increased but also the contrast of the peripheral area of ​​the displayed image can be improved, thereby improving the picture quality.

[0195] Fig. 12A and Fig. 12B It is used to explain the Fig.11 Schematic diagram of the dual structure providing driving voltage and dimming signal to each local area.

[0196] Reference Fig. 12A , the power supply 190 may supply the second driving voltage (VLED_B) to the first cell block 1110 and supply the second driving voltage (VLED_B) to the second cell block 731 .

[0197] That is, since each of the first cell block 1110 and the second cell block 731 includes the same number of LEDs, the power supply 190 may supply the same driving voltage to each of the first cell block 1110 and the second cell block 731 .

[0198] For example, refer to Fig. 12B When the voltage supplied to one LED is 5.7V, the first driving voltage (VLED_A) supplied to the first unit block 1110 is 91.2V (16×5.7), and the second driving voltage (VLED_B) supplied to the second unit block 731 is 91.2V (16×5.7).

[0199] Thus, even if there is a size difference between the first unit block 1110 and the second unit block 731 , the supplied driving voltage may be the same.

[0200] Meanwhile, even if the number of LEDs included in the first unit block 1110 is the same as the number of LEDs included in the second unit block 731, the size of the first unit block 1110 is smaller than that of the second unit block 731. Since the density of the LEDs in the first unit block 1110 results in an increase in brightness, brightness compensation is necessary.

[0201] Since the number of LEDs of the first unit block 1110 is increased compared to the same size as the second unit block 731 , the backlight dimming controller 510 may calculate a brightness compensation amount to be compensated.

[0202] The backlight dimming controller 510 may calculate a third brightness amount corresponding to the size of the first unit block 1110 and calculate a second brightness amount corresponding to the size of the second unit block 731 .

[0203] The backlight dimming controller 510 may obtain a value as the brightness compensation amount by subtracting the second brightness amount from the third brightness amount.

[0204] The backlight dimming controller 510 may adjust a dimming curve of each of the plurality of first unit blocks included in the first partial area 710 according to the calculated brightness compensation amount.

[0205] The dimming curve may be a curve representing the characteristics of the dimming value of the unit block. The horizontal axis of the dimming curve may be grayscale values ​​from 0 to 255, and the vertical axis may be dimming values ​​from 0% to 100%.

[0206] The backlight dimming controller 510 may generate a third dimming signal reflecting the calculated brightness compensation amount (brightness reduction amount), and transmit the generated third dimming signal to the backlight unit 250 .

[0207] The third dimming signal may include a dimming value for controlling each of the plurality of first unit blocks.

[0208] The backlight dimming controller 510 may adjust the dimming curve of each of the plurality of first unit blocks to reflect the brightness compensation amount. The backlight dimming controller 510 may adjust the dimming curve so that the dimming value increases compared to the same grayscale value.

[0209] The backlight dimming controller 510 generates a second dimming signal and transmits the second dimming signal to the backlight unit 510 .

[0210] The second dimming signal may include a dimming value for controlling each of the plurality of second unit blocks.

[0211] The backlight dimming controller 510 may store the brightness compensation amount corresponding to each unit block in a memory in advance. The memory may be included in the backlight dimming controller 510 or may be provided separately.

[0212] The backlight dimming controller 510 may read the brightness compensation amount of each unit block from the memory, and transmit a dimming signal reflecting the read brightness compensation amount to the backlight unit 500. Therefore, the brightness of each unit block can be compensated.

[0213] Fig.13 is a schematic diagram illustrating a configuration of a unit block of a screen with a dual structure according to another embodiment of the present disclosure.

[0214] Reference Fig.13 , the screen can have Figure 7 The dual structure of the embodiment.

[0215] That is, the entire screen area may include the first partial area 710 and the second partial area 730 , and the second partial area 730 is an area other than the first partial area 710 .

[0216] Each of the plurality of first unit blocks 1310 included in the first partial area 710 may include 9 LEDs 1311 .

[0217] Each of the plurality of second unit blocks 731 included in the second partial area 730 may include 16 LEDs 903 .

[0218] The intervals between two adjacent LEDs included in the first unit block 1310 in the horizontal or vertical direction are the same.

[0219] The intervals between two horizontally or vertically adjacent LEDs included in the second unit block 731 are the same.

[0220] A spacing between two horizontally or vertically adjacent LEDs of the first unit block 1310 may be smaller than a spacing between two horizontally or vertically adjacent LEDs of the second unit block 731 .

[0221] That is, the number of LEDs in the first unit block 1110 is also smaller than the number of LEDs in the second unit block 731, and by reducing the interval between two adjacent LEDs, a small-sized block can be achieved.

[0222] Therefore, according to Fig.13In the case of the dual structure of the embodiment, the number of LEDs included in the first unit block 1110 is smaller than the number of LEDs included in the second unit block 731, and the spacing between adjacent LEDs of the first unit block 1310 can be smaller than the spacing between adjacent LEDs of the second unit block 731.

[0223] Therefore, compared with a case where the entire screen area is composed of unit blocks of the same size, the number of LEDs can be reduced and power consumption can be saved.

[0224] Furthermore, by designing the unit block of the central area perceived by the viewer to be small in size, not only the resolution is increased but also the contrast of the peripheral area of ​​the displayed image is improved, thereby improving the picture quality.

[0225] Meanwhile, the type of the LED 1311 included in the first unit block 1310 and the type of the LED 903 included in the second unit block 731 may be different from each other.

[0226] The light emitting efficiency of the LED 1311 included in the first unit block 1310 may be better than the light emitting efficiency of the LED 903 included in the second unit block 731 .

[0227] Fig.14 It is used to explain the Fig.13 Schematic diagram of the dual structure providing driving voltage and dimming signal to each local area.

[0228] Reference Fig.14 , the power supply 190 may supply the first driving voltage (VLED_A) to the first unit block 1310 and the second driving voltage (VLED_B) to the second unit block 731 .

[0229] That is, since the number of LEDs included in the first cell block 1310 is the same as the number of LEDs included in the second cell block 731 , the power supply 190 may supply the same driving voltage to each first cell block in the first cell block 1310 and each second cell block in the second cell block 731 .

[0230] The magnitude of the second driving voltage (VLED_B) may be greater than the magnitude of the first driving voltage (VLED_A).

[0231] For example, when the voltage supplied to one LED is 5.7V, the magnitude of the first driving voltage (VLED_A) supplied to the first unit block 1310 is 51.3V (9×5.7), and the magnitude of the second unit block 1310 is 51.3V (9×5.7). The magnitude of the second driving voltage (VLED_B) supplied to the second unit block (731) is 91.2V (16×5.7).

[0232] As such, due to the size difference between the first unit block 1330 and the second unit block 731 , the supplied driving voltage may also be supplied in a different manner.

[0233] Meanwhile, since the number of LEDs included in the first unit block 1310 is smaller than the number of LEDs included in the second unit block 731 , brightness is reduced and brightness compensation is required.

[0234] In another embodiment, the backlight dimming controller 510 may calculate a fourth brightness amount corresponding to the size of the first unit block 1310 and calculate a second brightness amount corresponding to the size of the second unit block 731 .

[0235] The backlight dimming controller 510 may obtain a value as the brightness compensation amount by subtracting the fourth brightness amount from the second brightness amount.

[0236] The backlight dimming controller 510 may generate a fourth dimming signal reflecting the calculated brightness compensation amount and transmit the generated fourth dimming signal to the backlight unit 250 .

[0237] The backlight dimming controller 510 may adjust a dimming curve of each of the plurality of first unit blocks included in the first partial area 710 according to the calculated brightness compensation amount.

[0238] Fig.15 is a schematic diagram illustrating a screen with a dual structure according to another embodiment of the present disclosure.

[0239] Reference Fig.15 , the entire screen area may include a first partial area 1510 and a second partial area 1530 excluding the first partial area 1510 .

[0240] The first partial area 1510 may be a central area of ​​the screen, and the second partial area 1510 may be an outer area surrounding the first partial area 1510 .

[0241] The first partial region 1510 may include a plurality of first unit blocks, and the second partial region 1530 may include a plurality of second unit blocks.

[0242] A size of each of the plurality of first unit blocks 1511 and a size of each of the plurality of second unit blocks 1531 may be the same.

[0243] The number of LEDs 1513 or the arrangement structure of the LEDs 1513 included in each of the plurality of first unit blocks 1511 may be different from the number of LEDs 1533 or the arrangement structure of the LEDs 1513 included in each of the plurality of second unit blocks 1531 .

[0244] For example, the number of LEDs 1513 included in the first unit block 1511 may be 16, and the number of LEDs 1533 included in the second unit block 1531 may be 9. Therefore, a pitch between LEDs included in the first unit block 1511 may be smaller than a pitch between LEDs included in the second unit block 1531.

[0245] In accordance with Fig.15 In the embodiment of FIG. 1 , the number and arrangement structure of the LEDs included in the first unit block 1511 may be different from the number and arrangement structure of the LEDs 1533 included in the second unit block 1531 .

[0246] Fig.16A and Fig. 16B It is used to explain the Fig.15 A schematic diagram of a driving voltage and a dimming signal provided to each local area in an embodiment.

[0247] Fig.16A and 16B , the power supply 190 may supply the second driving voltage (VLED_B) to the first unit block 1511 and the first driving voltage (VLED_A) to the second unit block 1531 .

[0248] The magnitude of the second driving voltage (VLED_B) may be greater than the magnitude of the first driving voltage (VLED_A).

[0249] like Fig.15 As shown, the first unit block 1511 includes 16 LEDs, and the second unit block 1531 includes 9 LEDs, so the magnitude of the driving voltage supplied to each unit block may vary.

[0250] For example, refer to Fig. 16B When the voltage supplied to one LED is 5.7V, the magnitude of the first driving voltage (VLED_B) supplied to the first unit block 1511 is 91.2V (16×5.7), and the magnitude of the first driving voltage (VLED_A) supplied to the second unit block 1531 is 51.3V (9×5.7).

[0251] As such, due to the size difference between the first unit block 1511 and the second unit block 1531 , the supplied driving voltage may also be supplied in a different manner.

[0252] Meanwhile, since the number of LEDs included in the first unit block 1511 is greater than the number of LEDs included in the second unit block 1531, brightness increases and brightness compensation is required.

[0253] Since the number of LEDs in the first unit block 1511 is greater than that in the second unit block 1531 , the backlight dimming controller 510 may calculate a brightness compensation amount.

[0254] The backlight dimming controller 510 may calculate a brightness compensation amount corresponding to the increased number of LEDs in the first unit block 1511 .

[0255] For example, Fig.15 As shown, when the number of LEDs in the first unit block 1511 is 16 and the number of LEDs in the second unit block 1531 is 9, the backlight dimming controller 510 can calculate the brightness compensation amount corresponding to 7 LEDs.

[0256] The backlight dimming controller 510 may pre-store a unit brightness compensation amount corresponding to one LED. A memory (not shown) or storage device 140 included in the backlight dimming controller 510 or provided separately may pre-store a unit brightness compensation amount corresponding to one LED.

[0257] The backlight dimming controller 510 may calculate brightness compensation amounts corresponding to the seven LEDs using the stored unit brightness compensation amounts.

[0258] The backlight dimming controller 510 may store the brightness compensation amount corresponding to each unit block in a memory in advance. The memory may be included in the backlight dimming controller 510 or provided separately.

[0259] The backlight dimming controller 510 may read the brightness compensation amount of each unit block from the memory, and transmit a dimming signal reflecting the read brightness compensation amount to the backlight unit 500. Therefore, the brightness of each unit block can be compensated.

[0260] For example, the backlight dimming controller 510 may read the brightness compensation amount of the first unit block 1511 from the memory, and transmit a fifth dimming signal reflecting the read brightness compensation amount to the backlight unit 500 .

[0261] In another embodiment, the backlight dimming controller 510 may calculate a first brightness amount corresponding to the first unit block 1511 and a second brightness amount corresponding to the second unit block 1531 .

[0262] The backlight dimming controller 510 may obtain a value as the brightness compensation amount by subtracting the first brightness amount from the second brightness amount.

[0263] The backlight dimming controller 510 may adjust a dimming curve of each of the plurality of first unit blocks included in the first partial area 1511 according to the calculated brightness compensation amount.

[0264] The dimming curve may be a curve representing the characteristics of the dimming value of the unit block. The horizontal axis of the dimming curve may be a grayscale value of 0 to 255, and the vertical axis may be a dimming value of 0% to 100%.

[0265] The backlight dimming controller 510 may generate a fifth dimming signal reflecting the calculated brightness compensation amount and transmit the generated fifth dimming signal to the backlight unit 250 .

[0266] The fifth dimming signal may include a dimming value for controlling each of the plurality of first unit blocks 1511 .

[0267] The backlight dimming controller 510 may adjust the dimming curve of each of the plurality of first unit blocks 1511 to reflect the brightness compensation amount (brightness increase amount). The backlight dimming controller 510 may adjust the dimming curve so that the dimming value increases compared to the same grayscale value.

[0268] The backlight dimming controller 510 generates a second dimming signal and transmits the second dimming signal to the backlight unit 510 .

[0269] The second dimming signal may include a dimming value for controlling each of the plurality of second unit blocks 1531 .

[0270] exist Fig.15 In the case of the dual structure of the embodiment, the number of LEDs included in the first unit block 1511 is greater than the number of LEDs included in the second unit block 1531 having the same size as the first unit block 1511, and the density of the LEDs is also high.

[0271] Therefore, not only the resolution of the central area mainly perceived by the viewer can be improved, but also the contrast of the peripheral portion of the displayed image can be improved, thereby improving the picture quality.

[0272] The present disclosure described above can be implemented as a computer-readable code on a program-recorded medium. Computer-readable media include all types of recording devices that store data that can be read by a computer system. Examples of computer-readable media may include HDD (hard disk drive), SSD (solid state disk), SDD (silicon disk drive), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical disk storage device, etc.

[0273] Furthermore, the computer may include the controller 170 of the display device 100 .

Claims

1. A display device, comprising: power supply; a display panel configured to output an image; a backlight source including a plurality of backlight unit blocks configured to provide light to the display panel; as well as a backlight dimming controller configured to control light provided by the backlight source to correspond to the image output by the display panel; wherein the entire area of ​​the display panel is divided into a first partial area including a plurality of first unit blocks and a second partial area including a plurality of second unit blocks, each of the plurality of first unit blocks including a plurality of light emitting diodes (LEDs), and each of the plurality of second unit blocks including a plurality of LEDs; and Wherein, the power supply is configured as: supplying a first driving voltage to one of the plurality of first cell blocks in the first partial area; and A second driving voltage different from the first driving voltage is supplied to one of the plurality of second cell blocks in the second partial area.

2. The display device according to claim 1, wherein: A size of one of the plurality of first unit blocks is smaller than a size of one of the plurality of second unit blocks.

3. The display device according to claim 2, wherein: The number of LEDs included in one of the plurality of first unit blocks is smaller than the number of LEDs included in one of the plurality of second unit blocks.

4. The display device according to claim 3, wherein: A pitch between adjacent LEDs included in one of the plurality of first unit blocks is equal to a pitch between adjacent LEDs included in one of the plurality of second unit blocks.

5. The display device according to claim 3, wherein: The backlight dimming controller is further configured to: calculating a brightness compensation amount of a first unit block among the plurality of first unit blocks; and A dimming signal reflecting the calculated brightness compensation amount is transmitted to the backlight source.

6. The display device according to claim 5, wherein: The backlight dimming controller is further configured to: calculating a first brightness amount corresponding to a first unit block among the plurality of first unit blocks; calculating a second brightness amount corresponding to one of the plurality of second unit blocks; and A difference between the first brightness amount and the second brightness amount is calculated as the brightness compensation amount.

7. The display device according to claim 5, further comprising a memory configured to store the brightness compensation amount corresponding to one of the plurality of first unit blocks; in, The backlight dimming controller is further configured to: reading the brightness compensation amount from the memory; and The dimming signal reflecting the read brightness compensation amount is transmitted to the backlight source.

8. The display device according to claim 3, wherein: A pitch between adjacent LEDs included in one of the plurality of first unit blocks is smaller than a pitch between adjacent LEDs included in one of the plurality of second unit blocks.

9. The display device according to claim 3, wherein: A first unit block among the plurality of first unit blocks includes an LED having higher light emission efficiency than a second unit block among the plurality of second unit blocks.

10. The display device according to claim 1, wherein: The first partial area is a central area of ​​the entire area of ​​the display panel, and the second partial area is an outer area surrounding the central area.

Images