Display device

Abstract

A display device according to embodiments 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 for 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 the image output through the display panel, wherein the entire area of ​​the display panel is divided into a first partial region including a plurality of first unit blocks and a second partial region including a plurality of second unit blocks, wherein the power supply is configured to: supply a first driving voltage to the first unit blocks in the first partial region and supply a second driving voltage different from the first driving voltage to the second unit blocks in the second partial region.

Description

Technical Field

[0001] This disclosure relates to a display device, and more specifically, to a display device that performs local dimming. Background Technology

[0002] Active matrix liquid crystal display devices use thin film transistors (hereinafter referred to as "TFTs") as switching elements to display moving images.

[0003] Compared to cathode ray tubes (CRTs), liquid crystal displays (LCDs) can be manufactured in smaller sizes, making them suitable not only for portable information devices, office equipment, and display devices such as computers, but also for televisions. As a result, LCDs rapidly replaced CRTs.

[0004] Transmissive liquid crystal displays, which account for the majority of liquid crystal display devices, display images by controlling the electric field applied to the liquid crystal layer to modulate the light from the backlight unit.

[0005] Meanwhile, backlight dimming methods have been proposed to reduce the power consumption of backlight units. Local dimming is one such backlight dimming method, which improves contrast by locally controlling the brightness of the display surface within a frame period.

[0006] Local dimming can be a method used to separate input image data by dividing the display screen of a liquid crystal display panel into virtual blocks in a matrix form, obtain a representative value of the input image data for each block, and adjust the dimming value of each block according to the representative value of each block, thereby controlling the brightness of the light source of the backlight unit of each block.

[0007] Traditionally, all cell blocks are arranged at a constant size. To increase dimming resolution, it is advantageous to use smaller cell block sizes.

[0008] However, as the size of the unit block decreases, the LEDs must be arranged more densely, which increases the number of LEDs, leading to increased manufacturing costs, power consumption, and heat generation.

[0009] Conversely, as the size of the unit block increases, the resolution decreases, which leads to a decrease in contrast in the outer parts of the image.

[0010] In addition, 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 a decrease in resolution. Summary of the Invention

[0011] Technical issues

[0012] The purpose of this disclosure is to reduce power consumption and improve resolution and contrast by implementing smaller unit blocks in areas that the user considers the main area for dimming.

[0013] The purpose of this disclosure is to implement cell blocks of different sizes in the central area and the outer area outside the central area of ​​a display panel.

[0014] Technical solution

[0015] A display device according to embodiments 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 for 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 the image output through the display panel, wherein an entire area of ​​the display panel is divided into a first partial region including a plurality of first unit blocks and a second partial region including a plurality of second unit blocks, wherein the power supply is configured to supply a first driving voltage to the first unit blocks in the first partial region and to supply a second driving voltage different from the first driving voltage to the second unit blocks in the second partial region.

[0016] Beneficial effects

[0017] According to this disclosure, power consumption can be saved by reducing the number of LEDs compared to a situation where the entire screen area is composed of unit blocks of the same size.

[0018] Furthermore, by designing the unit blocks in the central area perceived by the viewer to be small in size, not only is the resolution improved, but the contrast of the peripheral areas of the displayed image is also improved, thereby improving the image quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram illustrating a display device according to an embodiment of the present invention.

[0020] Figure 2 yes Figure 1 Example of a block diagram showing the inside of a device.

[0021] Figure 3 yes Figure 2 Example of a block diagram inside the controller.

[0022] Figure 4 yes Figure 2 A block diagram of the power supply and the internal components of the display.

[0023] Figure 5 This is an example showing the arrangement of light sources in a liquid crystal display panel and a direct-type backlight unit.

[0024] Figure 6This is a schematic diagram illustrating a case where each of the multiple cell blocks corresponding to a screen has the same size, according to the prior art.

[0025] Figure 7 and Figure 8 This is a schematic diagram illustrating a case where the unit blocks of each of the multiple local regions constituting a screen according to an embodiment of the present disclosure have different sizes.

[0026] Figure 9 This is a schematic diagram illustrating the configuration of a unit block of a screen with a dual structure according to an embodiment of the present disclosure.

[0027] Figure 10A and Figure 10B It is used to explain the basis Figure 9 A schematic diagram showing the driving voltage and dimming signal provided to each local area by the dual structure.

[0028] Figure 11 This is a schematic diagram illustrating the configuration of a unit block of a screen with a dual structure according to another embodiment of the present disclosure.

[0029] Figure 12A and Figure 12B It is used to explain the basis Figure 11 A schematic diagram showing the driving voltage and dimming signal provided to each local area by the dual structure.

[0030] Figure 13 This is a schematic diagram illustrating the configuration of a unit block of a screen having a dual structure according to another embodiment of the present disclosure.

[0031] Figure 14 It is used to explain the basis Figure 13 A schematic diagram showing the driving voltage and dimming signal provided to each local area by the dual structure.

[0032] Figure 15 This is a schematic diagram illustrating a screen with a dual structure according to another embodiment of the present disclosure.

[0033] Figure 16A and Figure 16B It is used to explain the basis Figure 15 A schematic diagram of the driving voltage and dimming signal provided to each local area in the embodiment. Detailed Implementation

[0034] In the following, embodiments relating to this disclosure will be described in detail with reference to the accompanying drawings. The suffixes “module” and “unit” used for components in the following description are designated or combined for convenience in drafting the specification and have no particular meaning or function in themselves.

[0035] The invention will now be described in detail with reference to the accompanying drawings.

[0036] The suffixes “module” and “unit” used for components in the following description are specified or combined for the convenience of writing the specification and have no special meaning or function in themselves.

[0037] It is understood that although the terms first, second, etc. may be used herein to describe various elements of the 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.

[0038] Unless the context clearly indicates otherwise, singular representations may include plural representations.

[0039] It is understood that the terms "comprising" or "including" are used in this specification to indicate the presence of several components or steps, and may exclude some components or steps, or may include other components or steps.

[0040] Figure 1 This is a schematic diagram illustrating a display device according to an embodiment of the present invention.

[0041] Referring to the accompanying drawings, the display device 100 includes a display 180.

[0042] On the other hand, the display 180 is implemented using one of various types of panels. For example, the display 180 is one of the following panels: a liquid crystal display panel (LCD panel), an organic light-emitting diode (OLED) panel, and an inorganic light-emitting diode (ILED) panel.

[0043] According to the present invention, it is assumed that the display 180 includes a liquid crystal display panel (LCD panel).

[0044] on the other hand, Figure 1 Examples of display devices 100 include monitors, televisions, tablets, mobile terminals, etc.

[0045] Figure 2 yes Figure 1 Example of a block diagram showing the inside of a device.

[0046] 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.

[0047] The broadcast receiver 130 may include a tuner 131, a demodulator 132, and a network interface 133.

[0048] Tuner 131 can select a specific broadcast channel according to a channel selection command. Tuner 131 can receive broadcast signals for the selected specific broadcast channel.

[0049] The demodulator 132 can divide the received broadcast signal into video signal, audio signal, and broadcast program related data signal, and restore the divided video signal, audio signal, and data signal into an output usable form.

[0050] Network interface 133 can provide an interface for connecting display device 100 to a wired / wireless network, including the Internet. Network interface 133 can send or receive data to or from another user or electronic device via an accessed network or another network linked to an accessed network.

[0051] Network interface 133 can access a predetermined webpage through the accessed network or another network linked to the accessed network. That is, it can access the predetermined webpage through the network to send data to or receive data from the corresponding server.

[0052] Then, network interface 133 can receive content or data provided by content providers or network operators. That is, network interface 133 can receive content provided by content providers or network providers, such as movies, advertisements, games, VOD, and broadcast signals and related information, through the network.

[0053] In addition, network interface 133 can receive firmware update information and update files provided by network operators and transmit the data to the Internet or content providers or network operators.

[0054] Network interface 133 can select and receive the required applications from applications open to the air via the network.

[0055] External device interface 135 can receive applications or application lists from adjacent external devices and transmit them to controller 170 or storage device 140.

[0056] External device interface 135 can provide a connection path between display device 100 and external devices. External device interface 135 can receive at least one of image and audio output from an external device wirelessly or wiredly connected to display device 100 and transmit it to the controller. External device interface 135 may include multiple external input terminals. These multiple external input terminals may include RGB terminals, at least one High Definition Multimedia Interface (HDMI) terminal, and component terminals.

[0057] Image signals from external devices input through external device interface 135 can be output through display 180. Audio signals from external devices input through external device interface 135 can be output through audio output interface 185.

[0058] The external device that can be connected to the external device interface 135 can be one of a set-top box, Blu-ray player, DVD player, game console, speaker, smartphone, PC, USB storage device, and home theater system, but this is just an example.

[0059] In addition, some content data stored in the display device 100 can be transmitted to users or electronic devices, which are selected from other users or other electronic devices pre-registered in the display device 100.

[0060] Storage device 140 is capable of storing image, voice or data signals of signal processing stored by a program, so that each signal can be processed and controlled in controller 170.

[0061] In addition, the storage device 140 can perform the function of temporarily storing image, voice or data signals output from the external device interface 135 or the network interface 133, and can store information on a predetermined image through the channel memory function.

[0062] Storage device 140 can store applications or application lists input from external device interface 135 or network interface 133.

[0063] Display device 100 can play content files (e.g., video files, still image files, music files, document files, application files, etc.) stored in storage device 140 and provide them to the user.

[0064] User input interface 150 can transmit user input signals to controller 170 or transmit signals from controller 170 to the user. For example, user input interface 150 can receive or process control signals (such as power on / off, channel selection, screen settings) from remote controller 200, or transmit control signals from controller 170 to remote controller 200 according to various communication methods (such as Bluetooth, ultra-wideband (WB), ZigBee, radio frequency (RF), and infrared).

[0065] In addition, the user input interface 150 can transmit control signals input from local keys (not shown), such as power keys, channel keys, volume keys, and settings keys, to the controller 170.

[0066] The image signal processed in the controller 170 can be input to the display 180 and displayed as an image corresponding to the corresponding image signal. Furthermore, the image signal processed in the controller 170 can be input to an external output device via the external device interface 135.

[0067] The voice signal processed in controller 170 can be output to audio output interface 185. Furthermore, the voice signal processed in controller 170 can be input to an external output device via external device interface 135.

[0068] In addition, the controller 170 can control the overall operation of the display device 100.

[0069] In addition, the controller 170 can control the display device 100 through user commands or internal programs input through the user input interface 150, and download the required applications or application lists to the display device 100 when accessing the network.

[0070] The controller 170 can output user-selected channel information and processed image or voice signals via the display 180 or the audio output interface 185.

[0071] In addition, based on the external device image playback command received through the user input interface 150, the controller 170 can output image or audio signals from external devices (such as cameras or video cameras) through the display 180 or the audio output interface 185, which are input through the external device interface 135.

[0072] Furthermore, the controller 170 can control the display 180 to display images, and can control broadcast images input via the tuner 131, externally input images input via the external device interface 135, images input via the network interface, or images stored in the storage device 140 that will be displayed on the display 180. In this case, the image displayed on the display 180 can be a still image or video, or a 2D image or a 3D image.

[0073] In addition, the controller 170 can play content stored in the display device 100, received broadcast content, and external input content from external sources, and this content can be in various formats, such as broadcast images, external input images, audio files, still images, accessed web page screens, and document files.

[0074] Furthermore, the wireless communication interface 173 can perform wired or wireless communication with external electronic devices. The wireless communication interface 173 can perform short-range communication with external devices. For this purpose, the wireless communication interface 173 can utilize Bluetooth. TMThe wireless communication interface 173 supports short-range communication via at least one of the following technologies: Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, Near Field Communication (NFC), Wi-Fi, Wi-Fi Direct, and Wireless Universal Serial Bus (USB). The wireless communication interface 173 can 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) via a wireless local area network. The wireless local area network can be a wireless personal area network (WLAN).

[0075] In this document, other display devices 100 may be mobile terminals, such as wearable devices (e.g., smartwatches, smart glasses, and head-mounted displays (HMDs)) or smartphones, capable of exchanging data (or collaborating) with display device 100. Wireless communication interface 173 is capable of detecting (or identifying) wearable devices in the vicinity of display device 100. Furthermore, if the detected wearable device is an authenticated device communicating with display device 100, controller 170 can transmit at least a portion of the data processed in display device 100 to the wearable device via wireless communication interface 173. Therefore, a user of the wearable device can use the data processed in display device 100 through the wearable device.

[0076] The display 180 can convert the image signals, data signals, or OSD signals processed in the controller 170, or the image signals or data signals received by the external device interface 135, into R, G, and B signals to generate drive signals.

[0077] also, Figure 2 The display device 100 shown is only one embodiment of the present invention. Therefore, some of the components shown can be integrated, added or omitted according to the specification of the actual implementation of the display device 100.

[0078] In other words, if necessary, two or more components can be integrated into one component, or a component can be divided into two or more components and configured. Furthermore, the functions performed by each block describe specific embodiments of the invention and their specific operations or devices, but do not limit the scope of the invention.

[0079] According to another embodiment of the present invention, with Figure 2 Unlike other devices, display device 100 can receive and play images via network interface 133 or external device interface 135 without including tuner 131 and demodulator 132.

[0080] For example, display device 100 can be divided into image processing devices (such as set-top boxes for receiving broadcast signals or content according to various network services) and content playback devices for playing content input from the image processing devices.

[0081] In this case, the operation method of the display device according to the embodiments of the present invention described below can be referred to Figure 2 The described display device, image processing device (such as a separate set-top box), and content playback device (including display 180 and audio output interface 185) are used to perform this function.

[0082] The audio output interface 185 receives audio processing signals from the controller 170 and outputs sound.

[0083] Power supply 190 supplies the necessary power to the entire display device 100. In particular, power supply 190 supplies power to the controller 170, which can be implemented as a system-on-a-chip (SoC), the display 180 for displaying images, and the audio output interface 185 for outputting audio.

[0084] Specifically, power supply 190 may include a converter for converting AC power to DC power, and a DC / DC converter for converting the level of DC power.

[0085] The remote controller 200 transmits user input to the user input interface 150. For this purpose, the remote controller 200 can use Bluetooth, radio frequency (RF) communication, infrared (IR) communication, ultra-wideband (UWB), ZigBee, etc. Furthermore, the remote controller 200 can receive video, audio, or data signals output from the user input interface 150 and display the video, audio, or data signals or output sound.

[0086] Figure 3 yes Figure 2 Example of a block diagram inside the controller.

[0087] For the purposes of description with reference to the accompanying 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. It also includes an audio processor (not shown) and a data processor (not shown).

[0088] Demultiplexer 310 demultiplexes the stream input. For example, in the case of an input MPEG-2TS, the MPEG-2TS is demultiplexed into an image signal, an audio signal, and a data signal. At this time, the stream signal input to demultiplexer 310 is a stream signal output from tuner 110, demodulator 120, or external device interface 135.

[0089] Image processor 320 performs image processing on the image signal generated by demultiplexing. For this purpose, image processor 320 includes image decoder 325 or scaler 335.

[0090] Image decoder 325 decodes the image signal generated by demultiplexing. Scaler 335 performs scaling in such a way that the resolution of the decoded image signal makes it possible for the image signal to be output to display 180.

[0091] Examples of image decoders 325 may include decoders conforming to various specifications. For example, examples of image decoders 325 include decoders for MPEG-2, decoders for H.264, 3D image decoders for color and depth images, decoders for multi-point images, and so on.

[0092] The processor 330 controls the overall operation within the display device 100 or controller 170. For example, the processor 330 controls the tuner 110 in such a way that the tuner 110 performs the selection (tuning) of RF broadcasts corresponding to a user-selected channel or a channel that has been stored.

[0093] In addition, the processor 330 uses user commands entered through the user input interface 150 or an internal program to control the display device 100.

[0094] In addition, the processor 330 performs control over data transfer between the network interface 133 or the external device interface 135.

[0095] In addition, the processor 330 controls the operation of each demultiplexer 310, image processor 320, OSD generator 340, etc. within the controller 170.

[0096] OSD generator 340 generates OSD signals based on user input or automatically. For example, based on user input signals, it generates signals for displaying various information in graphical or text format on the screen of display 180. The generated OSD signals include various data, menu screens, widgets, icons, etc., for the user interface screen of display device 100. Furthermore, the OSD generated signals include 2D or 3D objects.

[0097] Furthermore, based on the pointing signal input from the remote controller 200, the OSD generator 340 generates a pointer that may be displayed on the monitor. Specifically, the pointer is generated in a pointing signal processor, and the OSD generator 340 includes a 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 provided separately (not shown).

[0098] Mixer 345 mixes the OSD signal generated in OSD generator 340 with the image signal generated by image processing and decoding in image processor 320. The mixed image signal is then provided to frame rate converter 350.

[0099] The frame rate converter (FRC) 350 converts the frame rate of the image input. On the other hand, the frame rate converter 350 may also output the image as is without converting its frame rate separately.

[0100] On the other hand, the formatter 360 converts the format of the input image signal into the format of the image signal to be displayed on the monitor, and outputs the image generated by its format conversion.

[0101] The Formatter 360 modifies the format of an image signal. For example, it can change the format of a 3D image signal to any of the following 3D formats: side-by-side, top-bottom, frame sequence, interlaced, and checkbox.

[0102] On the other hand, the audio processor (not shown) within the controller 170 performs audio processing on the audio signal generated by demultiplexing. For this purpose, the audio processor (not shown) includes various decoders.

[0103] In addition, the audio processor (not shown) within the controller 170 performs processing for bass, treble, volume adjustment, etc.

[0104] A data processor (not shown) within the controller 170 performs data processing on the data signal generated by demultiplexing. For example, if the data signal generated by demultiplexing is an encoded data signal, the data signal is decoded. The encoded data signal is an electronic program guide, which includes broadcast information such as the start and end times of the broadcast program to be broadcast on each channel.

[0105] on the other hand, Figure 3 The block diagram of controller 170 shown is a block diagram of an embodiment of the present invention. Each component in the block diagram is integrated, added, or omitted according to the description of the actual implementation of controller 170.

[0106] Specifically, the frame rate converter 350 and the formatter 360 can be provided independently of each other, or as a separate module, without being provided within the controller 170.

[0107] Figure 4 yes Figure 2 A block diagram of the power supply and the internal components of the display.

[0108] Referring to the accompanying drawings, the 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.

[0109] 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 in a matrix shape and intersecting each other, 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.

[0110] Drive circuit 230 responds to Figure 2 The controller 170 supplies control signals and data signals to drive the liquid crystal display panel 210. For this purpose, the driving circuit 230 includes a timing controller 232, a gate driver 234, and a data driver 236.

[0111] The timing controller 232 receives control signals, R, G, B data signals, vertical synchronization signal Vsync, etc. from the controller 170, controls the gate driver 234 and the data driver 236 to respond to the control signals, and rearranges the R, G, B data signals and provides them to the data driver 236.

[0112] 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 line GL and the data line DL.

[0113] The backlight unit 250 supplies light to the liquid crystal display panel 210. For this purpose, the backlight unit 250 may include a plurality of light sources 252, a scan driver 254 for controlling the scanning drive of the light sources 252, and a light source driver 256 for turning the light sources 252 on / off.

[0114] A predetermined image is displayed using light emitted from the backlight unit 250, and the transmittance of the liquid crystal layer is adjusted by the electric field generated between the pixel electrode and the common electrode of the liquid crystal display panel 210.

[0115] 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 driving power to the backlight unit 250 for driving the light source 252.

[0116] Simultaneously, the backlight unit 250 can be divided and driven into multiple blocks. The controller 170 can control the display 180 to perform local dimming by setting a dimming value for each block. Specifically, the timing controller 232 can output input image data RGB to the backlight dimming controller 510, and the backlight dimming controller 510 can calculate the dimming value of each of the multiple blocks based on the input image data RGB received from the timing controller 232.

[0117] Figure 5 This is an example showing the arrangement of light sources in a liquid crystal display panel and a direct-type backlight unit.

[0118] like Figure 5 As shown, the liquid crystal display panel 210 can be divided into multiple virtual blocks. Although the liquid crystal display panel 210... Figure 5 The LCD panel 210 is divided into 16 blocks, from BL1 to BL16, but it should be noted that the LCD panel 210 is not limited to this. Each block may include multiple pixels.

[0119] The backlight unit 250 can be implemented as either edge-type or direct-type.

[0120] The edge-type backlight unit 250 has a structure in which multiple optical sheets and light guide plates are stacked below the liquid crystal display panel 210 and multiple light sources are placed on the side of the light guide plate.

[0121] The direct-type backlight unit 250 has a structure in which multiple optical sheets and diffusers are stacked below the liquid crystal display panel 210 and multiple light sources are placed below the diffusers.

[0122] like Figure 5 As shown, when the backlight unit 250 is a direct-light type backlight unit, it is divided into blocks BL1 to BL16 of the liquid crystal display panel 210, corresponding one-to-one. 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 located at a position corresponding to the first block BL1 of the liquid crystal display panel 210.

[0123] Light source 252 can be a point light source, such as a light-emitting diode (LED). Light source 252 turns on and off in response to a light source drive signal LDS from light source driver 256. Light source 252 can adjust the intensity of light according to the amplitude of the light source drive signal LDS, and can also adjust it according to the pulse width during the conduction time. The brightness of the light output from light source 252 can be adjusted according to the light source drive signal LDS.

[0124] Based on the dimming value of the block input from the backlight dimming controller 510, the light source driver 256 can generate a light source drive signal LDS and output it to the light source 252. The dimming value of the block, i.e., the value used to perform local dimming, can be the brightness of the light output from the light source 252.

[0125] Figure 6 This is a schematic diagram illustrating a case where each of the multiple cell blocks corresponding to a screen has the same size, according to the prior art.

[0126] The brightness of each unit block in the multiple unit blocks 601 can be controlled one by one by the backlight unit 250.

[0127] The screen display area 610 is the area where the image is output, while the backlight unit on the area 630 is the area where the backlight unit 250 provides light to output the image of the screen display area 610.

[0128] like Figure 6 As shown, when the unit blocks are the same size, the backlight units in region 630 become larger than the screen display area 610, and light is supplied to more than the 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.

[0129] Figure 7 and Figure 8 This is a schematic diagram illustrating a case where the unit blocks of each of the multiple local regions constituting a screen according to an embodiment of the present disclosure have different sizes.

[0130] In the following text, a unit block is a block corresponding to a unit area of ​​the display panel 210, and may be a block that supplies light to the unit area of ​​the display panel 210.

[0131] In particular, Figure 7 This is a schematic diagram illustrating a screen divided into two local areas. Figure 8 This is a diagram illustrating the situation where the screen is divided into three local areas.

[0132] Reference Figure 7 The entire screen area can be divided into a first local area 710 and a second local area 730.

[0133] The first local region 710 may include a plurality of first unit blocks. Each of the plurality of first unit blocks may have the same size.

[0134] The second local region 730 may include a plurality of second unit blocks. Each of the plurality of second unit blocks may have the same size.

[0135] The first local area 710 can be located in the center of the screen, and the second local area 730 can be located outside the screen. That is to say, in the entire area, the outer area other than the first local area 710 can be the second local area 730.

[0136] The second local region 730 can be positioned around the first local region 710.

[0137] The first local area 710 can be an important area that is primarily perceived by the viewer, while the second local area 730 can be an unimportant area that the viewer does not pay much attention to.

[0138] The size of the first unit block 711 can be smaller than the size of the second unit block 731. The size of the second unit block 731 can be the same as... Figure 6 The size of unit block 601 is the same.

[0139] exist Figure 7 In this case, the backlight units on screen display area 610 and area 750 can be the same.

[0140] Because the size of the first unit block 711 constituting the first local region 710 becomes smaller than Figure 6 The size of the unit block 601 is such that the size of the backlight unit (6 unit blocks) on the area 750 can also be smaller.

[0141] In other words, according to Figure 7 The embodiments, and Figure 6 Compared to existing technologies, 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.

[0142] Therefore, power consumption waste is prevented, and since the backlight units on screen display area 610 and area 750 become the same size, the resolution and contrast of the outer area of ​​screen display area 610 can also be improved.

[0143] Reference Figure 8 The entire screen area can be divided into a fourth local area 810, a fifth local area 830, and a sixth local area 850.

[0144] The fourth local region 810 may include multiple fourth unit blocks, the fifth local region 830 may include multiple fifth unit blocks, and the sixth local region 850 may include multiple sixth unit blocks.

[0145] Each of the multiple fourth unit blocks can have the same size.

[0146] Each of the multiple fifth unit blocks can have the same size.

[0147] Each of the multiple sixth unit blocks can have the same size.

[0148] The fourth local area 810 is located in 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.

[0149] The size of the fourth unit block 811 can be smaller than the size of the fifth unit block 831.

[0150] The size of the fifth unit block 831 can be smaller than the size of the sixth unit block 851.

[0151] In other words, the size of a unit can increase as it moves outward from the center of the screen.

[0152] Figure 9 This is a schematic diagram illustrating the configuration of a unit block of a screen having a dual structure according to an embodiment of the present disclosure.

[0153] Reference Figure 9 The screen can have similar Figure 7 The dual structure of the embodiment.

[0154] In other words, the entire screen area can include a first local area 710 and a second local area 730, where the second local area 730 is the area outside the first local area 710.

[0155] Each of the multiple first unit blocks 711 included in the first local region 710 may include nine light-emitting diodes (LEDs).

[0156] The first unit block 711 may include nine LEDs 901 arranged at regular intervals. The spacing between adjacent LEDs arranged in the horizontal direction of the first unit block 711 may be equal to each other, and the spacing between adjacent LEDs arranged in the vertical direction of the first unit block 711 may be equal to each other.

[0157] Each of the multiple second unit blocks 731 included in the second local region 730 may include 16 LEDs 903.

[0158] The spacing between adjacent LEDs arranged in the horizontal direction of the second unit block 731 is the same, and the spacing between adjacent LEDs arranged in the vertical direction of the second unit block 731 is also the same.

[0159] Furthermore, the spacing between two horizontally or vertically adjacent LEDs in the first unit block 711 can be the same as the spacing between horizontally or vertically adjacent LEDs in the second unit block 731.

[0160] Therefore, according to Figure 9 In the dual-structure embodiment, the spacing between adjacent LEDs in the first unit block 711 is the same as the spacing between adjacent LEDs in the second unit block 731, but the number of LEDs included in the first unit block 711 may be less than the number of LEDs included in the second unit block 731.

[0161] Therefore, compared to a screen area composed of unit blocks of the same size, it is possible to reduce the number of LEDs and save power consumption.

[0162] Furthermore, by designing the unit blocks in the central area perceived by the viewer to be small in size, not only is the resolution improved, but the contrast of the peripheral areas of the displayed image is also improved, thereby improving the image quality.

[0163] Figure 10A and Figure 10B It is used to explain the basis Figure 9 A schematic diagram showing the driving voltage and dimming signal provided to each local area by the dual structure.

[0164] Reference Figure 10A The power supply 190 can supply a first driving voltage (VLED_A) to the first unit block 711 and a second driving voltage (VLED_B) to the second unit block 731.

[0165] The magnitude of the second driving voltage (VLED_B) can be greater than the magnitude of the first driving voltage (VLED_A).

[0166] like Figure 9 As shown, the first unit block 711 includes 9 LEDs and the second unit block 731 includes 16 LEDs, so the magnitude of the driving voltage supplied to each unit block can vary.

[0167] For example, refer to Figure 10B When the voltage supplied to an LED is 5.7V, the magnitude of the first driving voltage (VLED_A) supplied to the first unit block 711 is 51.3V (9×5.7), and the magnitude of the second driving voltage (VLED_B) supplied to the second unit block 731 is 91.2V (16×5.7).

[0168] Thus, due to the size difference between the first unit block 711 and the second unit block 731, the supplied driving voltage can also be supplied in different ways.

[0169] Meanwhile, since the number of LEDs included in the first unit block 711 is less than the number of LEDs included in the second unit block 731, the brightness is reduced and brightness compensation is required.

[0170] The backlight dimming controller 510 can calculate the amount of brightness reduction due to the decrease in the number of LEDs in the first unit block 711.

[0171] The backlight dimming controller 510 can calculate the brightness compensation amount corresponding to the reduction in the number of LEDs in the first unit block 711. For example, as Figure 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 for the corresponding 7 LEDs.

[0172] The backlight dimming controller 510 can pre-store the unit brightness compensation amount corresponding to one LED. A memory (not shown) or storage device 140 included in or separately provided in the backlight dimming controller 510 can pre-store the unit brightness compensation amount corresponding to one LED.

[0173] The backlight dimming controller 510 can use the stored unit brightness compensation amount to calculate the brightness compensation amount corresponding to the 7 LEDs.

[0174] The backlight dimming controller 510 can pre-store the brightness compensation amount corresponding to each unit block in a memory. This memory can be included in the backlight dimming controller 510 or provided separately.

[0175] The backlight dimming controller 510 can 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, it is possible to compensate the brightness of each unit block.

[0176] For example, the backlight dimming controller 510 can 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.

[0177] In another embodiment, the backlight dimming controller 510 can calculate a first brightness amount corresponding to the size of the first unit block 711 and a second brightness amount corresponding to the size of the second unit block 731.

[0178] The backlight dimming controller 510 can obtain a value as a brightness compensation amount by subtracting the first brightness amount from the second brightness amount.

[0179] The backlight dimming controller 510 can adjust the dimming curve of each of the multiple first unit blocks included in the first local area 710 according to the calculated brightness compensation amount.

[0180] A dimming curve can be a curve representing the dimming value characteristics of a single unit. The horizontal axis of the dimming curve can be a grayscale value from 0 to 255, and the vertical axis can be a dimming value from 0% to 100%.

[0181] The backlight dimming controller 510 can generate a first dimming signal that reflects the calculated brightness compensation amount and transmit the generated first dimming signal to the backlight unit 250.

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

[0183] The backlight dimming controller 510 can adjust the dimming curve of each of the multiple first unit blocks to reflect the amount of brightness compensation (the amount of brightness increase). The backlight dimming controller 510 can adjust the dimming curve so that the dimming value increases compared to the same grayscale value.

[0184] The backlight dimming controller 510 generates a second dimming signal and transmits the second dimming signal to the backlight unit 510.

[0185] The second dimming signal may include a dimming value for controlling each of the plurality of second unit blocks.

[0186] Figure 11 This is a schematic diagram illustrating the configuration of a unit block of a screen with a dual structure according to another embodiment of the present disclosure.

[0187] Reference Figure 11 The screen can have, for example Figure 7 The dual structure of the embodiment.

[0188] In other words, the entire screen area can include a first local area 710 and a second local area 730, where the second local area 730 is the area outside the first local area 710.

[0189] Each first unit block included in the first unit block 1110 in the first local region 710 may include 16 LEDs 1111.

[0190] Each second unit block in the second unit block 731 included in the second local area 730 can include 16 LEDs 903.

[0191] The number of LEDs included in the first unit block 1110 can be the same as the number of LEDs included in the second unit block 731.

[0192] The spacing between two adjacent LEDs in the first unit block 1110 is the same in the horizontal or vertical direction.

[0193] The spacing between two adjacent LEDs in the second unit block 731 is the same in the horizontal or vertical direction.

[0194] The spacing between two horizontally or vertically adjacent LEDs in the first unit block 1110 can be smaller than the spacing between two horizontally or vertically adjacent LEDs in the second unit block 731.

[0195] In other words, by maintaining the number of LEDs in the first unit block 1110 while reducing the distance between two adjacent LEDs, the size of the block can be reduced.

[0196] Therefore, according to Figure 11 In the dual-structure 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 less than the spacing between adjacent LEDs in the second unit block 731.

[0197] In this way, by designing the unit blocks in the central area perceived by the viewer to be small in size, not only can the resolution be improved, but the contrast of the peripheral areas of the displayed image can also be improved, thereby improving the image quality.

[0198] Figure 12A and Figure 12B It is used to explain the basis Figure 11 A schematic diagram showing the driving voltage and dimming signal provided to each local area by the dual structure.

[0199] Reference Figure 12A The power supply 190 can supply a second driving voltage (VLED_B) to the first unit block 1110 and to the second unit block 731.

[0200] In other words, since each unit block in the first unit block 1110 and the second unit block 731 includes the same number of LEDs, the power supply 190 can supply the same driving voltage to each unit block in the first unit block 1110 and the second unit block 731.

[0201] For example, refer to Figure 12B When the voltage supplied to an LED is 5.7V, the magnitude of the first driving voltage (VLED_A) supplied to the first unit block 1110 is 91.2V (16×5.7), and the magnitude of the second driving voltage (VLED_B) supplied to the second unit block 731 is 91.2V (16×5.7).

[0202] In this way, even if there is a size difference between the first unit block 1110 and the second unit block 731, the supplied driving voltage can be the same.

[0203] Furthermore, 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 the size of the second unit block 731. Since the increased LED density in the first unit block 1110 leads to increased brightness, brightness compensation is necessary.

[0204] Since the number of LEDs in the first unit block 1110 is increased compared to the second unit block 731, which has the same size, the backlight dimming controller 510 can calculate the amount of brightness compensation to be made.

[0205] The backlight dimming controller 510 can calculate a third brightness amount corresponding to the size of the first unit block 1110 and a second brightness amount corresponding to the size of the second unit block 731.

[0206] The backlight dimming controller 510 can obtain a value as a brightness compensation amount by subtracting the second brightness amount from the third brightness amount.

[0207] The backlight dimming controller 510 can adjust the dimming curve of each of the multiple first unit blocks included in the first local area 710 according to the calculated brightness compensation amount.

[0208] A dimming curve can be a curve that represents the dimming value characteristics of a unit block. The horizontal axis of the dimming curve can be a grayscale value from 0 to 255, and the vertical axis can be a dimming value from 0% to 100%.

[0209] The backlight dimming controller 510 can generate a third dimming signal that reflects the calculated brightness compensation amount (brightness reduction amount) and transmit the generated third dimming signal to the backlight unit 250.

[0210] The third dimming signal may include a dimming value for controlling each of the multiple first unit blocks.

[0211] The backlight dimming controller 510 can adjust the dimming curve of each of the plurality of first unit blocks to reflect the amount of brightness compensation. The backlight dimming controller 510 can adjust the dimming curve so that the dimming value is increased compared to the same grayscale value.

[0212] The backlight dimming controller 510 generates a second dimming signal and transmits the second dimming signal to the backlight unit 510.

[0213] The second dimming signal may include a dimming value for controlling each of the plurality of second unit blocks.

[0214] The backlight dimming controller 510 can pre-store the brightness compensation amount corresponding to each unit block in a memory. The memory can be included in the backlight dimming controller 510 or provided separately.

[0215] The backlight dimming controller 510 can 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, it is possible to compensate the brightness of each unit block.

[0216] Figure 13 This is a schematic diagram illustrating the configuration of a unit block of a screen with a dual structure according to another embodiment of the present disclosure.

[0217] Reference Figure 13 The screen can have, for example Figure 7 The dual structure of the embodiment.

[0218] In other words, the entire screen area can include a first local area 710 and a second local area 730, where the second local area 730 is the area outside the first local area 710.

[0219] Each of the plurality of first unit blocks 1310 included in the first local region 710 may include nine LEDs 1311.

[0220] Each of the multiple second unit blocks 731 included in the second local region 730 may include 16 LEDs 903.

[0221] The spacing between two adjacent LEDs in the first unit block 1310 is the same in the horizontal or vertical direction.

[0222] The spacing between two horizontally or vertically adjacent LEDs included in the second unit block 731 is the same.

[0223] The spacing between two horizontally or vertically adjacent LEDs in the first unit block 1310 can be smaller than the spacing between two horizontally or vertically adjacent LEDs in the second unit block 731.

[0224] In other words, the number of LEDs in the first unit block 1110 is also less than the number of LEDs in the second unit block 731, and a smaller block size can be achieved by reducing the spacing between two adjacent LEDs.

[0225] Therefore, according to Figure 13In the dual-structure embodiment, the number of LEDs included in the first unit block 1110 is less than the number of LEDs included in the second unit block 731, and the spacing between adjacent LEDs in the first unit block 1310 can be less than the spacing between adjacent LEDs in the second unit block 731.

[0226] Therefore, compared to a screen area composed of unit blocks of the same size, it is possible to reduce the number of LEDs and save power consumption.

[0227] Furthermore, by designing the unit blocks in the central area perceived by the viewer to be small in size, not only is the resolution improved, but the contrast of the peripheral areas of the displayed image is also improved, thereby improving the image quality.

[0228] Meanwhile, the types of LEDs 1311 included in the first unit block 1310 and LEDs 903 included in the second unit block 731 can be different from each other.

[0229] The luminous efficiency of LED 1311 included in the first unit block 1310 can be better than that of LED 903 included in the second unit block 731.

[0230] Figure 14 It is used to explain the basis Figure 13 A schematic diagram showing the driving voltage and dimming signal provided to each local area by the dual structure.

[0231] Reference Figure 14 The power supply 190 can supply a first driving voltage (VLED_A) to the first unit block 1310 and a second driving voltage (VLED_B) to the second unit block 731.

[0232] In other words, since the number of LEDs included in the first unit block 1310 is the same as the number of LEDs included in the second unit block 731, the power supply 190 can supply the same driving voltage to each first unit block in the first unit block 1310 and each second unit block in the second unit block 731.

[0233] The magnitude of the second driving voltage (VLED_B) can be greater than the magnitude of the first driving voltage (VLED_A).

[0234] For example, when the voltage supplied to an 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).

[0235] Thus, due to the size difference between the first unit block 1330 and the second unit block 731, the supplied driving voltage can also be supplied in different ways.

[0236] Meanwhile, since the number of LEDs included in the first unit block 1310 is less than the number of LEDs included in the second unit block 731, the brightness is reduced and brightness compensation is required.

[0237] In another embodiment, the backlight dimming controller 510 can calculate a fourth brightness amount corresponding to the size of the first unit block 1310 and a second brightness amount corresponding to the size of the second unit block 731.

[0238] The backlight dimming controller 510 can obtain a value as a brightness compensation amount by subtracting the fourth brightness amount from the second brightness amount.

[0239] The backlight dimming controller 510 can generate a fourth dimming signal that reflects the calculated brightness compensation amount and transmit the generated fourth dimming signal to the backlight unit 250.

[0240] The backlight dimming controller 510 can adjust the dimming curve of each of the multiple first unit blocks included in the first local area 710 according to the calculated brightness compensation amount.

[0241] Figure 15 This is a schematic diagram illustrating a screen with a dual structure according to another embodiment of the present disclosure.

[0242] Reference Figure 15 The entire screen area may include a first local area 1510 and a second local area 1530 other than the first local area 1510.

[0243] The first local area 1510 may be the central area of ​​the screen, and the second local area 1510 may be the outer area surrounding the first local area 1510.

[0244] The first local region 1510 may include a plurality of first unit blocks, while the second local region 1530 may include a plurality of second unit blocks.

[0245] The size of each first unit block in the plurality of first unit blocks 1511 and the size of each second unit block in the plurality of second unit blocks 1531 can be the same.

[0246] The number of LEDs 1513 in each of the multiple first unit blocks 1511 or the arrangement of LEDs 1513 may differ from the number of LEDs 1533 in each of the multiple second unit blocks 1531 or the arrangement of LEDs 1513.

[0247] For example, the number of LEDs 1513 included in the first unit block 1511 can be 16, while the number of LEDs 1533 included in the second unit block 1531 can be 9. Therefore, the spacing between the LEDs included in the first unit block 1511 can be smaller than the spacing between the LEDs included in the second unit block 1531.

[0248] According to Figure 15 In one embodiment, the number and arrangement of LEDs included in the first unit block 1511 may differ from the number and arrangement of LEDs 1533 included in the second unit block 1531.

[0249] Figure 16A and Figure 16B It is used to explain the basis Figure 15 A schematic diagram of the driving voltage and dimming signal provided to each local area in the embodiment.

[0250] Figure 16A and 16B In this configuration, power supply 190 can supply a second driving voltage (VLED_B) to the first unit block 1511 and a first driving voltage (VLED_A) to the second unit block 1531.

[0251] The magnitude of the second driving voltage (VLED_B) can be greater than the magnitude of the first driving voltage (VLED_A).

[0252] like Figure 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 can vary.

[0253] For example, refer to Figure 16B When the voltage supplied to an 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).

[0254] Thus, due to the size difference between the first unit block 1511 and the second unit block 1531, the supplied driving voltage can also be supplied in different ways.

[0255] 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, the brightness increases and brightness compensation is required.

[0256] 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 can calculate the brightness compensation amount.

[0257] The backlight dimming controller 510 can calculate the amount of brightness compensation corresponding to the number of LEDs added in the first unit block 1511.

[0258] For example, such as Figure 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 the 7 LEDs.

[0259] The backlight dimming controller 510 can pre-store the unit brightness compensation amount corresponding to one LED. A memory (not shown) or storage device 140 included in or separately provided in the backlight dimming controller 510 can pre-store the unit brightness compensation amount corresponding to one LED.

[0260] The backlight dimming controller 510 can use the stored unit brightness compensation amount to calculate the brightness compensation amount corresponding to the 7 LEDs.

[0261] The backlight dimming controller 510 can pre-store the brightness compensation amount corresponding to each unit block in a memory. The memory can be included in the backlight dimming controller 510 or provided separately.

[0262] The backlight dimming controller 510 can 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, it is possible to compensate the brightness of each unit block.

[0263] For example, the backlight dimming controller 510 can 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.

[0264] In another embodiment, the backlight dimming controller 510 can calculate a first brightness amount corresponding to the first unit block 1511 and a second brightness amount corresponding to the second unit block 1531.

[0265] The backlight dimming controller 510 can obtain a value as a brightness compensation amount by subtracting the first brightness amount from the second brightness amount.

[0266] The backlight dimming controller 510 can adjust the dimming curve of each of the multiple first unit blocks included in the first local area 1511 according to the calculated brightness compensation amount.

[0267] A dimming curve can be a curve that represents the characteristics of the dimming value of a unit block. The horizontal axis of the dimming curve can be a grayscale value from 0 to 255, and the vertical axis can be a dimming value from 0% to 100%.

[0268] The backlight dimming controller 510 can generate a fifth dimming signal that reflects the calculated brightness compensation amount and transmit the generated fifth dimming signal to the backlight unit 250.

[0269] The fifth dimming signal may include a dimming value for controlling each of the plurality of first unit blocks 1511.

[0270] The backlight dimming controller 510 can adjust the dimming curve of each of the plurality of first unit blocks 1511 to reflect the amount of brightness compensation (the amount of brightness increase). The backlight dimming controller 510 can adjust the dimming curve so that the dimming value increases compared to the same grayscale value.

[0271] The backlight dimming controller 510 generates a second dimming signal and transmits the second dimming signal to the backlight unit 510.

[0272] The second dimming signal may include a dimming value for controlling each of the plurality of second unit blocks 1531.

[0273] exist Figure 15 In the dual-structure case 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 which has the same size as the first unit block 1511, and the LED density is also higher.

[0274] Therefore, it can not only improve the resolution of the central area that is mainly perceived by the viewer, but also improve the contrast of the peripheral parts of the displayed image, thereby improving the image quality.

[0275] The present disclosure described above can be implemented as computer-readable code on a program recording medium. Computer-readable media include all types of recording devices that store data readable by a computer system. Examples of computer-readable media include HDDs (hard disk drives), SSDs (solid-state drives), SDDs (silicon disk drives), ROMs, RAMs, CD-ROMs, magnetic tapes, floppy disks, optical disc storage devices, etc.

[0276] In addition, the computer may include a controller 170 for the display device 100.

Claims

1. A display device, comprising: power supply; The display panel is configured to output images; A backlight, comprising multiple backlight unit blocks, is configured to provide light to the display panel; as well as A backlight dimming controller is configured to control the light provided by the backlight source to correspond to the image output by the display panel; The display panel is divided into a first partial region comprising multiple first unit blocks and a second partial region comprising multiple second unit blocks. Each of the multiple first unit blocks includes multiple light-emitting diodes (LEDs), and each of the multiple second unit blocks includes multiple LEDs. The power supply is configured as follows: A first driving voltage is supplied to one of the plurality of first unit blocks in the first local region; and A second driving voltage, different from the first driving voltage, is supplied to one of the plurality of second unit blocks in the second local region; Wherein, the number of LEDs included in one of the plurality of first unit blocks is less than the number of LEDs included in one of the plurality of second unit blocks; Furthermore, the backlight dimming controller is configured as follows: Calculate the brightness compensation amount of one of the plurality of first unit blocks; and A dimming signal reflecting the calculated brightness compensation amount is transmitted to the backlight.

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

3. The display device according to claim 1, wherein, The spacing between adjacent LEDs in one of the plurality of first unit blocks is equal to the spacing between adjacent LEDs in one of the plurality of second unit blocks.

4. The display device according to claim 1, wherein, The backlight dimming controller is also configured to: Calculate the first luminance quantity corresponding to one of the plurality of first unit blocks; Calculate the second luminance quantity corresponding to one of the plurality of second unit blocks; and The difference between the first brightness amount and the second brightness amount is calculated as the brightness compensation amount.

5. The display device according to claim 1, 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 also configured to: Read the brightness compensation amount from the memory; and The dimming signal, which reflects the read brightness compensation amount, is transmitted to the backlight.

6. The display device according to claim 1, wherein, The spacing between adjacent LEDs in one of the plurality of first unit blocks is smaller than the spacing between adjacent LEDs in one of the plurality of second unit blocks.

7. The display device according to claim 1, wherein, The luminous efficiency of the LEDs included in one of the plurality of first unit blocks is higher than the luminous efficiency of the LEDs included in one of the plurality of second unit blocks.

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

9. The display device according to claim 1, wherein, The magnitude of the second driving voltage is greater than the magnitude of the first driving voltage.

10. The display device according to claim 1, wherein, The plurality of first unit blocks are of equal size, and the plurality of second unit blocks are of equal size.

11. The display device according to claim 10, wherein, The backlight dimming controller is also configured to: Calculate the first luminance quantity corresponding to one of the plurality of first unit blocks; Calculate the second luminance quantity corresponding to one of the plurality of second unit blocks; and The difference between the first brightness amount and the second brightness amount is calculated as the brightness compensation amount.

Images