CN114648963B

CN114648963B - Display device and light emitting apparatus

Info

Publication number: CN114648963B
Application number: CN202210207830.6A
Authority: CN
Inventors: 金成烈; 梁城福; 龙锡雨; 李启薰; 崔准成
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2020-12-03
Filing date: 2021-03-08
Publication date: 2023-04-07
Anticipated expiration: 2041-03-08
Also published as: CN116360154A; CN114648963A

Abstract

The present disclosure relates to a display device and a light emitting apparatus. A display device includes a liquid crystal panel and a light emitting device. The light emitting device includes: a plate; a plurality of light-adjusting blocks, each of the plurality of light-adjusting blocks including at least one light source provided on a first surface of a board; and a plurality of driving devices provided on the first surface of the board, each of the plurality of driving devices applying a driving current to the at least one light source included in each of the plurality of dimming blocks, wherein the plurality of driving devices may be respectively arranged at different relative positions within a plurality of dimming areas defined by the plurality of dimming blocks.

Description

Display device and light emitting apparatus

The present application is a divisional application of chinese patent application 202180003992.1, entitled "display device and light emitting device thereof", having an application date of 2021, 3, month and 8.

Technical Field

The present disclosure relates to a display device and a light emitting device thereof, and more particularly, to a thin display device and a light source module thereof.

Background

In general, a display device is one of output devices for displaying obtained or stored electrical information to a user by converting the electrical information into visual information, and is used in various fields such as home or workplace.

There are many different display apparatuses such as a monitoring apparatus connected to a Personal Computer (PC) or a server computer, a portable computer system, a Global Positioning System (GPS) terminal, a general-purpose television, an Internet Protocol Television (IPTV), a portable terminal (e.g., a smart phone, a tablet PC, a Personal Digital Assistant (PDA), and a cellular phone), any other display device for reproducing images such as advertisements or movies, or other various audio/video systems.

The display device includes a light source module converting electrical information into visual information, the light source module including a plurality of light sources individually emitting light. Each of the plurality of light sources comprises, for example, a Light Emitting Diode (LED) or an Organic LED (OLED). For example, the LEDs or OLEDs may be mounted on a circuit board or board.

Recently, the thickness of the display device becomes thinner and thinner. In order to realize such a thin display device, the light source module is also becoming thinner and thinner.

As the thickness of the light source module becomes thinner, the light source module has an optical defect (e.g., mura) recognizable to a user. For example, the optical defect may be caused by an arrangement of LEDs or an arrangement of driving circuits in a thin light source module.

Disclosure of Invention

Technical problem

An aspect of the present disclosure provides a display device and a light emitting device thereof capable of preventing or suppressing optical defects (e.g., mura).

Solution to the problem

A display device according to an aspect of the present disclosure includes: a liquid crystal panel; and a light emitting device. The light emitting device includes: a plate; a plurality of light-adjusting blocks, each of the plurality of light-adjusting blocks including at least one light source provided on a first surface of a board; and a plurality of driving devices provided on the first surface of the board, each of the plurality of driving devices applying a driving current to the at least one light source included in each of the plurality of dimming blocks, wherein the plurality of driving devices may be respectively arranged at different relative positions within a plurality of dimming areas defined by the plurality of dimming blocks.

A light emitting device according to an aspect of the present disclosure includes: a plate; a plurality of light-adjusting blocks, each of the plurality of light-adjusting blocks including at least one light source provided on a first surface of a board; and a plurality of driving devices provided on the first surface of the board, each of the plurality of driving devices applying a driving current to the at least one light source included in each of the plurality of dimming blocks, wherein the plurality of driving devices may be respectively arranged at different relative positions within a plurality of dimming areas defined by the plurality of dimming blocks.

A display device according to an aspect of the present disclosure includes: a liquid crystal panel; and a light emitting device. The light emitting device includes: a plate; a plurality of light-adjusting blocks, each of the plurality of light-adjusting blocks including at least one light source provided on a first surface of a board; and a plurality of driving devices provided on the first surface of the board, each of the plurality of driving devices applying a driving current to the at least one light source included in each of the plurality of dimming blocks, wherein one of the plurality of driving devices may be arranged outside a virtual line defined by two driving devices closest to the one driving device.

Advantageous effects of the disclosure

According to an aspect of the present disclosure, a display device capable of preventing or suppressing optical defects (e.g., mura) and a light emitting device thereof may be provided.

Drawings

Fig. 1 is an external view of a display device according to an embodiment.

Fig. 2 is an exploded view of a display device according to an embodiment.

Fig. 3 illustrates a liquid crystal panel of a display device according to an embodiment.

Fig. 4 is an exploded view of a light emitting device of a display device according to an embodiment.

Fig. 5 is a perspective view of a light source included in a light emitting device according to an embodiment.

Fig. 6 illustrates an example of a Light Emitting Diode (LED) included in a light emitting device according to an embodiment.

Fig. 7 illustrates a configuration of a display device according to an embodiment.

Fig. 8 illustrates a dimming block of a light emitting device included in a display device according to an embodiment.

Fig. 9 illustrates an example in which a display device converts image data into dimming data according to an embodiment.

Fig. 10 illustrates an example of a dimming driver and a light emitting device included in a display device according to an embodiment.

Fig. 11 illustrates an example of a driving device included in a display apparatus according to an embodiment.

Fig. 12 illustrates an arrangement of a dimming driver, a driving device, and a light source included in a display apparatus according to an embodiment.

Fig. 13 illustrates an example of an arrangement of a driving device included in a display apparatus according to an embodiment.

Fig. 14 illustrates an example of an arrangement of a driving device included in a display apparatus according to an embodiment.

Fig. 15 illustrates an example of an arrangement of a driving device included in a display apparatus according to an embodiment.

Fig. 16 illustrates an example of a dimming driver and a light emitting device included in a display device according to an embodiment.

Fig. 17 illustrates an example of a driving device included in a display apparatus according to an embodiment.

Fig. 18 illustrates an example of an arrangement of a driving device included in a display apparatus according to an embodiment.

Fig. 19 illustrates an example of an arrangement of driving devices included in a display apparatus according to an embodiment.

Fig. 20 illustrates an example of an arrangement of a driving device included in a display apparatus according to an embodiment.

Fig. 21 illustrates an example of an arrangement of driving devices included in a display apparatus according to an embodiment.

Detailed Description

Like numbers refer to like elements throughout. Not all elements of the embodiments of the present disclosure will be described, and descriptions of elements that are known in the art or that overlap each other in the embodiments will be omitted. Terms used throughout this specification such as "component," "module," "member," "block," and the like may be implemented as software and/or hardware, multiple "components," "modules," "members," or "blocks" may be implemented in a single element, or a single "component," "module," "member," or "block" may include multiple elements.

It will also be understood that the term "connected," or derivatives thereof, refers to both direct and indirect connections, and that indirect connections include connections through a wireless communication network.

The terms "comprising (or including 8230of 8230; or" comprising (or including 8230of 8230), or "comprising (or including 8230of 8230) are inclusive or open-ended and do not exclude additional, unrecited elements or method steps, unless otherwise indicated.

Throughout the specification, when a member is said to be "on" another member, it means not only that the member is located adjacent to the other member, but also that a third member is present between the two members.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another region, layer or section.

It will be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.

The reference numbers used for the method steps are for convenience of illustration only and are not intended to limit the order of the steps. Thus, the order of description may be implemented in other ways, unless the context clearly dictates otherwise.

The principles and embodiments of the present disclosure will now be described with reference to the drawings.

Fig. 1 is an external view of a display device according to an embodiment.

The display apparatus 10 is a device for processing an image signal received from the outside and visually presenting the processed image. In the following description, it is assumed that the display apparatus 10 is a Television (TV), but the embodiments of the present disclosure are not limited thereto. For example, the display apparatus 10 may be implemented in various forms such as, but not limited to, a monitor, a portable multimedia device, a portable communication device, and any device capable of visually presenting an image.

The display device 10 may be a large-sized display (LFD) installed outdoors, such as on the roof of a building or at a bus stop. However, the display device 10 is not only installed outdoors, but may be installed anywhere, even indoors where there is a large flow of people, such as in subway stations, malls, theaters, offices, shops, and the like.

The display apparatus 10 may receive content including video and audio signals from various content sources and output video and audio corresponding to the video and audio signals. For example, the display apparatus 10 may receive content data through a broadcast receiving antenna or a cable, receive content data from a content reproducing device, or receive content data from a content providing server of a content provider.

As shown in fig. 1, the display device 10 includes a main body 11 and a screen 12 for displaying an image I.

The main body 11 forms the exterior of the display device 10, and a component for the display device 10 to display an image I or perform many different functions may be included in the main body 11. Although the body 11 of fig. 1 is shaped like a flat plate, it is not limited thereto. For example, the body 11 may have the form of a curved plate.

A screen 12 may be formed on the front of the main body 11 for displaying the image I. For example, the screen 12 may display a still image or a moving image. For example, the screen 12 may display a two-dimensional (2D) planar image or a three-dimensional (3D) stereoscopic image using the parallax of both eyes of the user.

The screen 12 may include, for example, a self-light emitting panel (e.g., a Light Emitting Diode (LED) panel or an Organic LED (OLED) panel) capable of directly emitting light, or a non-light emitting panel (e.g., a liquid crystal panel) capable of passing or blocking light emitted from, for example, a light emitting device (e.g., a backlight unit).

A plurality of pixels P are formed on the screen 12, and an image I displayed on the screen 12 may be formed by light emitted from each of the plurality of pixels P. For example, the light emitted by each of the plurality of pixels P may be combined into an image I on the screen 12 like a mosaic.

Each of the plurality of pixels P may emit light of various colors and brightnesses. Each of the plurality of pixels P may include a sub-pixel P _R 、P _G And P _B To emit light of different colors.

Sub-pixel P _R 、P _G And P _B May comprise a red sub-pixel P emitting red light _R Green sub-pixel P emitting green light _G And a blue sub-pixel P emitting blue light _B . For example, red light may have a wavelength of about 620 nanometers (nm, parts per billion meters) to about 750 nm; the green light may have a wavelength of about 495nm to about 570 nm; the blue light may have a wavelength of about 430nm to about 495 nm.

By the red sub-pixel P _R Red and green sub-pixel P _G Green and blue sub-pixels P _B Each of the plurality of pixels P may emit light of various brightness and color.

Fig. 2 is an exploded view of a display device according to an embodiment. Fig. 3 illustrates a liquid crystal panel of a display device according to an embodiment.

As shown in fig. 2, the subject 11 may contain many different kinds of components to create the image I on the screen S.

For example, a light emitting device 100 as a surface light source, a liquid crystal panel 20 for blocking light emitted from the light emitting device 100 or passing the light, a control component 50 for controlling the operation of the light emitting device 100 and the liquid crystal panel 20, and a power component 60 for supplying power to the light emitting device 100 and the liquid crystal panel 20 are assembled in the main body 11. In addition, the main body 11 includes a bezel 13, a frame middle mold 14, a bottom chassis 15, and a rear cover 16 to support and fix the liquid crystal panel 20, the light emitting device 100, the control assembly 50, and the power assembly 60. An opening 15a is formed at the bottom chassis 15 to electrically connect the light emitting device 100 to the control assembly 50 and the power assembly 60.

The light emitting device 100 may include a point light source for emitting monochromatic or white light, and refract, reflect and diffuse the light emitted from the point light source to convert the light into uniform surface light. In this way, the light emitting device 100 can emit uniform surface light in the forward direction by refracting, reflecting, and diffusing the light emitted from the point light source.

The light emitting device 100 will now be described in more detail.

The liquid crystal panel 20 is disposed in front of the light emitting device 100, and serves to block or pass light emitted from the light emitting device 100 to generate an image I.

The front surface of the liquid crystal panel 20 may form the screen S of the aforementioned display device 10, and the liquid crystal panel 20 may include a plurality of pixels P. The plurality of pixels P included in the liquid crystal panel 20 may individually block or pass light from the light emitting device 100, and the light that has passed through the plurality of pixels P forms an image I to be displayed on the screen S.

For example, as shown in fig. 3, the liquid crystal panel 20 may include a first polarizing film 21, a first transparent plate 22, a pixel electrode 23, a Thin Film Transistor (TFT) 24, a liquid crystal layer 25, a common electrode 26, a color filter 27, a second transparent plate 28, and a second polarizing film 29.

The first and second transparent plates 22 and 28 may firmly support the pixel electrodes 23, the TFTs 24, the liquid crystal layer 25, the common electrode 26, and the color filters 27. The first and second transparent boards 22 and 28 may be formed of tempered glass or transparent resin.

The first and second polarizing films 21 and 29 are disposed outside the first and second transparent plates 22 and 28. The first and second polarizing films 21 and 29 may each pass a specific light while blocking other light. For example, the first polarizing film 21 may pass polarized light in a first direction while blocking different polarized light. In addition, the second polarizing film 29 may pass polarized light in the second direction while blocking different polarized light. The first direction and the second direction may be perpendicular to each other. As a result, the polarized light having passed through the first polarizing film 21 may not pass through the second polarizing film 29.

The color filter 27 may be disposed inside the second transparent plate 28. The color filter 27 may include, for example, a red color filter 27R for passing red light, a green color filter for passing green lightA blue color filter 27B for passing blue light, and a red color filter 27R, a green color filter 27G, and a blue color filter 27B may be arranged side by side. The region in which the color filter 27 is formed corresponds to the pixel P as described above. The region where the red color filter 27R is formed corresponds to the red sub-pixel P _R (ii) a The region where the green color filter 27G is formed corresponds to the green sub-pixel P _G (ii) a The region where the blue color filter 27B is formed corresponds to the blue sub-pixel P _B 。

The pixel electrode 23 may be disposed at an inner side of the first transparent board 22, and the common electrode 26 may be disposed at an inner side of the second transparent board 28. The pixel electrode 23 and the common electrode 26 are formed of a conductive metal material, and may generate an electric field to change the arrangement of liquid crystal molecules 115a forming the liquid crystal layer 25, which will be described below.

A Thin Film Transistor (TFT) 24 is disposed at an inner side of the second transparent board 22. The TFT 24 may pass or block a current flowing in the pixel electrode 23. For example, depending on whether the TFT 24 is on (closed) or off (open), an electric field may be formed between the pixel electrode 23 and the common electrode 26 or removed from between the pixel electrode 23 and the common electrode 26.

The liquid crystal layer 25 is formed between the pixel electrode 23 and the common electrode 26 and filled with liquid crystal molecules 25a. Liquid crystals are in an intermediate state between solid (crystal) and liquid. The liquid crystal shows optical characteristics according to a change in an electric field. For example, the liquid crystal may have different alignment directions of molecules forming the liquid crystal according to a change in an electric field. Accordingly, the optical characteristics of the liquid crystal layer 25 may be changed according to the presence or absence of an electric field passing through the liquid crystal layer 25.

On one side of the liquid crystal panel 20, a cable 20a for transmitting image data to the liquid crystal panel 20 and a display driver integrated circuit (DDI) 30 (hereinafter, referred to as "panel driver") for processing the digital image data to output an analog image signal are provided.

The cable 20a may be electrically connected between the control/power assembly 50/60 and the panel driver 30, and further electrically connected between the panel driver 30 and the liquid crystal panel 20. The cable 20a may comprise, for example, a flexible flat cable or a film cable that is bendable.

The panel driver 30 may receive image data and power from the control assembly 50/power assembly 60 through the cable 20a and transmit the image data and driving current to the liquid crystal panel 20 through the cable 20 a.

In addition, the cable 110b and the panel driver 30 may be integrally implemented as a film cable, a Chip On Film (COF), a Tape Carrier Package (TCP), or the like. In other words, the panel driver 30 may be disposed on the cable 20 b. However, it is not limited thereto, and the panel driver 30 may be disposed on the liquid crystal panel 20.

The control assembly 50 may include a control circuit for controlling the operations of the liquid crystal panel 20 and the light emitting device 100. The control circuit may process image data received from an external content source, transmit the image data to the liquid crystal panel 20, and transmit dimming data to the light emitting device 100.

The power assembly 60 may supply power to the liquid crystal panel 20 and the light emitting device 100, thereby causing the light emitting device 100 to output surface light and causing the liquid crystal panel 20 to block or pass light from the light emitting device 100.

The control assembly 50 and the power assembly 60 may be implemented with a Printed Circuit Board (PCB) and various circuits mounted on the PCB. For example, the power circuit may include a power circuit board and a capacitor, coil, resistor, processor, etc. mounted on the power circuit board. Further, the control circuit may include a control circuit board on which the memory and the processor are mounted.

Fig. 4 is an exploded view of a light emitting device of a display device according to an embodiment. Fig. 5 is a perspective view of a light source included in a light emitting device according to an embodiment. Fig. 6 illustrates an example of a Light Emitting Diode (LED) included in a light emitting device according to an embodiment.

As shown in fig. 4, the light emitting device 100 includes a light source module 110 for generating light, a reflective sheet 120 for reflecting the light, a diffusion plate 130 for uniformly diffusing the light, and an optical sheet 140 for enhancing the brightness of the output light.

The light source module 110 may include a plurality of light sources 111 for emitting light and a plate 112 for supporting/fixing the plurality of light sources 111.

The plurality of light sources 111 may be arranged in a predetermined pattern to emit light having uniform brightness. The plurality of light sources 111 may be arranged such that one light source is equidistant from its neighboring light sources.

For example, as shown in fig. 4, the plurality of light sources 111 may be arranged in rows and columns. Therefore, the plurality of light sources may be arranged such that adjacent four light sources almost form a rectangle. Further, a light source is positioned adjacent to four other light sources, and the distances between the light source and the four adjacent light sources are almost the same.

In another example, the plurality of light sources may be arranged in a plurality of rows, and the light source belonging to one row may be located in the middle of two light sources belonging to two adjacent rows. Thus, the plurality of light sources may be arranged such that adjacent three light sources almost form a triangle. In this case, one light source is positioned adjacent to six other light sources, and the distances between the light source and the six adjacent light sources are almost the same.

However, the arrangement of the plurality of light sources 111 is not limited thereto, and the plurality of light sources 111 may be arranged in various ways to emit light with uniform brightness.

The light source 111 may employ a device capable of emitting monochromatic light (light having a specific wavelength, such as blue light) or white light (mixed light of red light, green light, and blue light) in various directions when power is turned on.

Each of the plurality of light sources 111 includes an LED 190 and an optical dome 180.

The thinner the thickness of the display device 10 is, the thinner the thickness of the light emitting device 100 is. In order to make the light emitting device 100 thinner, each of the plurality of light sources 111 becomes thinner and the structure becomes simpler.

The LEDs 190 may be directly attached to the board 112 in a Chip On Board (COB) method. In other words, light source 111 may include LED 190 with the LED chip or LED die attached directly to board 112 without additional packaging.

The LED 190 may be flip-chip type fabricated. The flip-chip type LED 190 may not attach an LED as a semiconductor device to the board 112 using an intermediate medium such as a metal lead (wire) or a Ball Grid Array (BGA), but may fuse an electrode pattern of the semiconductor device as it is to the board 112. This may make it possible for the light source 111 comprising the flip-chip type LED 190 to become smaller by omitting metal leads (wires) or a ball grid array.

For example, the LED 190 may be a Distributed Bragg Reflector (DBR) LED including a DBR as shown in fig. 6.

The LED 190 includes a transparent plate 195, an n-type semiconductor layer (e.g., n-type gallium nitride (n-type GaN)) 193, and a p-type semiconductor layer (e.g., p-type GaN) 192. A Multiple Quantum Well (MQW) layer 194 and an Electron Blocking Layer (EBL) 197 are formed between the n-type semiconductor layer 193 and the p-type semiconductor layer 192. When a current is applied to LED 190, electrons and holes may recombine in MQW layer 194, thereby emitting light.

The first electrode 191a of the LED 190 is in electrical contact with the p-type semiconductor layer 192, and the second electrode 191b is in electrical contact with the n-type semiconductor layer 193. The first and

second electrodes

191a and 191b may function not only as electrodes but also as reflectors of reflected light.

The DBR layer 196 is disposed outside the transparent plate 195. The DBR layer 196 may be formed by stacking materials having different refractive indexes, and the DBR layer 196 may reflect incident light. Since the DBR layer 196 is disposed on the outer side (upper side in the drawing) of the transparent plate 195, light vertically entering the DBR layer 196 can be reflected by the DBR layer 196. Therefore, the intensity of light emitted in the direction D1 perpendicular to the DBR layer 196 (in the upward direction of the LED in the drawing) is lower than the intensity of light emitted in the direction D2 inclined from the DBR layer 196 (for example, a direction inclined by about 60 degrees from the upward direction in the drawing). In other words, the LED 190 may emit more intense light in the lateral direction than in the vertical direction.

The optical dome 180 may cover the LED 190. The optical dome 180 may prevent or inhibit damage to the LED 190 due to external mechanical and/or chemical action.

The optical dome 180 may be shaped, for example, as a dome obtained by cutting a sphere without including a center, or as a hemisphere obtained by cutting a sphere with including a center. The vertical cross-section of the optical dome 180 may have, for example, an arcuate form or a semi-circular form.

The optical dome 180 may be formed of silicon or epoxy. For example, molten silicon or epoxy is discharged through, for example, a nozzle onto the LED 190 and then hardened to form the optical dome 180.

Accordingly, the shape of the optical dome 180 may be changed differently depending on the viscosity of the fluid silicon or epoxy. For example, when the optical dome 180 is fabricated from silicon having a thixotropic index of about 2.7 to 3.3 (preferably 3.0), the optical dome 180 may be formed to have a dome ratio of about 0.25 to 0.31 (preferably 0.28) which represents a ratio of a dome height to a diameter of a bottom side of the dome (dome height/bottom side diameter). For example, an optical dome 180 fabricated from silicon having a thixotropic index of about 2.7 to 3.3 (preferably 3.0) may have a bottom side diameter of about 2.5mm and a height of about 0.7 mm.

The optical dome 180 may be optically transparent or translucent. Light emitted from the LED 190 may pass through the optical dome 180 to the outside.

In this case, the dome-shaped optical dome 180 may refract light like a lens. For example, light emitted from the LED 190 may be refracted and diffused by the optical dome 180.

In this way, the optical dome 180 may not only protect the LED 190 from external mechanical and/or chemical or electrical effects, but may also diffuse light emitted from the LED 190.

The board 112 may fix the plurality of light sources 111 to prevent the light sources 111 from moving. Further, the board 112 may supply power to each light source 111 so that the light source 111 may emit light.

The board 112 may fix the plurality of light sources 111, and may be formed of synthetic resin, tempered glass, or a Printed Circuit Board (PCB) in which a conductive power line is formed to supply power to the light sources 111.

The reflective sheet 120 may reflect light emitted from the plurality of light sources 111 to a forward direction or a direction close to the forward direction.

A plurality of through holes 120a are formed in the reflective sheet 120 at positions corresponding to the plurality of light sources 111 of the light source module 110. In addition, the light source 111 of the light source module 110 may pass through the through hole 120a and protrude forward from the reflective sheet 120. Accordingly, the plurality of light sources 111 may emit light from the front of the reflective sheet 120. The reflective sheet 120 may reflect light emitted from the plurality of light sources 111 toward the reflective sheet 120 toward the diffusion plate 130.

The diffusion plate 130 may be disposed in front of the light source module 110 and the reflection sheet 120 to uniformly diffuse light emitted from the light sources 111 of the light source module 110.

As described above, the plurality of light sources 111 are equidistantly arranged on the rear surface of the light emitting device 100. This may result in different brightness depending on the position of the plurality of light sources 111.

In order to eliminate the luminance difference due to the plurality of light sources 111, the diffusion plate 130 may diffuse the light emitted from the plurality of light sources 111 within the diffusion plate 130. In other words, the diffusion plate 130 may uniformly forward emit the non-uniform light from the plurality of light sources 111.

The optical sheets 140 may include various sheets to improve brightness and uniformity of brightness. For example, the optical sheets 140 may include a diffusion sheet 141, a first prism sheet 142, a second prism sheet 143, a reflective polarizer 144, and the like. The optical sheet 140 is not limited to a sheet or film as shown in fig. 4, but may also include various other sheets or films, such as a protective sheet.

Fig. 7 illustrates a configuration of a display device according to an embodiment. Fig. 8 illustrates a dimming block of a light emitting device included in a display device according to an embodiment. Fig. 9 illustrates an example in which a display device converts image data into dimming data according to an embodiment.

As shown in fig. 7, the display device 10 includes a content receiver 80, an image processor 90, a panel driver 30, a liquid crystal panel 20, a dimming driver 170, and a light emitting device 100.

The content receiver 80 may include a receiving terminal 81 and a tuner 82 for receiving content including video signals and/or audio signals from a content source.

The receiving terminal 81 may receive a video signal and an audio signal from a content source through a cable. For example, the reception terminal 81 may include a component (YPbPr/RGB) terminal, a Composite Video Blanking and Synchronization (CVBS) terminal, an audio terminal, a High Definition Multimedia Interface (HDMI) terminal, a Universal Serial Bus (USB) terminal, and the like.

The tuner 82 may receive broadcast signals through a broadcast receiving antenna or cable and extract a broadcast signal on a channel selected by a user from among the received broadcast signals. For example, the tuner 82 may pass a broadcast signal having a frequency corresponding to a channel selected by a user among a plurality of broadcast signals received through a broadcast receiving antenna or a cable, and block other broadcast signals having different frequencies.

In this way, the content receiver 80 may receive a video signal and an audio signal from a content source through the reception terminal 81 and/or the tuner 82 and output the video signal and/or the audio signal received through the reception terminal 81 and/or the tuner 82 to the image processor 90.

The image processor 90 may include a processor 91 for processing image data and a memory 92 for memorizing/storing data.

The memory 92 may store programs and data for processing video signals and/or audio signals, and temporarily store data generated in the process of processing the video signals and/or audio signals.

Memory 92 may include non-volatile memory (such as Read Only Memory (ROM), flash memory, etc.) as well as volatile memory (such as Static Random Access Memory (SRAM), dynamic RAM (DRAM), etc.).

The processor 91 may receive a video signal and/or an audio signal from the content receiver 80, decode the video signal into image data, and generate dimming data from the image data. The image data and the dimming data may be output to the panel driver 30 and the dimming driver 170.

The display device 10 may perform operations to improve the contrast of an image.

As described above, the light emitting device 100 may include the plurality of light sources 111, and diffuse light emitted from the plurality of light sources 111 to output surface light. The liquid crystal panel 20 may include a plurality of pixels, and control each of the plurality of pixels to pass or block light. The light that has passed through the plurality of pixels may form an image.

In this case, the display device 10 may turn off the light source of the light emitting device 100 corresponding to the dark portion of the image to further darken the dark portion of the image. Therefore, the contrast of the image can be enhanced.

In this way, the operation performed by the display device 10 to control the light emitting device 100 not to emit light from a portion corresponding to a dark portion of an image is referred to as "local dimming".

For local dimming, the plurality of light sources 111 included in the light source module 110 may be classified into a plurality of dimming blocks 200, as shown in fig. 8. In fig. 8, a total of 56 dimming blocks are shown, which are 8 × 7 wide and long, but the number and arrangement of the dimming blocks are not limited to those shown in fig. 8.

Each of the plurality of dimming blocks 200 may include at least one light source 111. The light emitting devices 100 may apply the same driving current to the light sources belonging to the same dimming block, and the light sources belonging to the same dimming block may emit light having the same brightness.

Further, the light emitting device 100 may apply different driving currents to the light sources belonging to different dimming blocks depending on the dimming data, and the light sources belonging to different dimming blocks may emit light having different brightness.

The processor 91 may provide dimming data for local dimming to the light emitting device 100. The dimming data may include information on the brightness of each of the plurality of dimming blocks 200. For example, the dimming data may include information on the intensity of light output from the light source included in each of the plurality of dimming blocks 200.

The processor 91 may obtain dimming data from image data decoded from the video signal.

The processor 91 may convert the image data into the dimming data in various methods. For example, as shown in FIG. 9, the processor 91 may divide an image I from image data into a plurality of image blocks IB. The number of the plurality of image blocks IB is the same as the number of the plurality of dimming blocks 200, and the plurality of image blocks IB may correspond to the plurality of dimming blocks 200, respectively.

The processor 91 can obtain the luminance values L of the plurality of dimming blocks 200 from the image data of the plurality of image blocks IB. Further, the processor 91 may generate dimming data by combining the luminance values L of the plurality of dimming blocks 200.

For example, the processor 91 may obtain the luminance value L of each of the plurality of dimming blocks 200 based on the maximum value of the luminance values of the pixels included in each of the image blocks IB.

The image block includes a plurality of pixels, and the image data of the image block may include image data (e.g., red data, green data, blue data, etc.) of the plurality of pixels. The processor 91 may calculate a luminance value for each pixel based on the image data of the pixel.

The processor 91 may determine a maximum value of luminance values of pixels included in an image block as a luminance value of a dimming block corresponding to the image block. For example, the processor 91 may determine the maximum value of the luminance values of the pixels included in the ith image block IB (i) as the luminance value L (i) of the ith dimming block and the maximum value of the luminance values of the pixels included in the jth image block IB (j) as the luminance value L (j) of the jth dimming block.

The processor 91 may generate dimming data by combining luminance values of the plurality of dimming blocks 200.

In this way, the image processor 90 may decode the video signal obtained through the content receiver 80 into image data and generate dimming data from the image data. In addition, the image processor 90 may transmit the image data and the dimming data to the liquid crystal panel 20 and the light emitting device 100, respectively.

The liquid crystal panel 20 includes a plurality of pixels capable of passing or blocking light, and the plurality of pixels are arranged in a matrix form. In other words, the plurality of pixels may be arranged in a plurality of rows and a plurality of columns.

The panel driver 30 may receive image data from the image processor 90 and drive the liquid crystal panel 20 according to the image data. Specifically, the panel driver 30 may convert image data (hereinafter, referred to as digital image data) as a digital signal into an analog image signal as an analog voltage signal, and supply the analog image signal to the liquid crystal panel 20. According to the analog image signal, optical characteristics (e.g., light transmittance) of the plurality of pixels included in the liquid crystal panel 20 may be changed.

The panel driver 30 may include, for example, a timing controller, a data driver, a scan driver, and the like.

The timing controller may receive image data from the image processor 90 and output the image data and driving control signals to the data driver and the scan driver. The driving control signals may include scan control signals and data control signals, which may be used to control the operations of the scan driver and the data driver, respectively.

The scan driver may receive a scan control signal from the timing controller and input to activate one of the plurality of rows in the liquid crystal panel 20 in response to the scan control signal. In other words, the scan driver converts pixels included in one row among the plurality of pixels arranged in a plurality of rows and columns into a state capable of receiving analog image signals. In this case, the pixels input to be deactivated cannot receive the analog image signal except the pixels input to be activated by the scan driver.

The data driver may receive image data and a data control signal from the timing controller and output the image data to the liquid crystal panel 20 according to the data control signal. For example, the data driver may receive digital image data from the timing controller and convert the digital image data into an analog image signal. In addition, the data driver may supply analog image signals to pixels included in a row activated by the scan driver input. In this case, the pixels input-activated by the scan driver receive analog image signals, which cause the optical characteristics (e.g., light transmittance) of the input-activated pixels to change.

In this way, the panel driver 30 may drive the liquid crystal panel 20 according to image data. Accordingly, an image corresponding to the image data can be displayed on the liquid crystal panel 20.

The light emitting device 100 includes a plurality of light sources 111 emitting light, and the plurality of light sources 111 are arranged in a matrix form. In other words, the plurality of light sources 111 may be arranged in a plurality of rows and columns. Further, the light emitting device 100 may be divided into a plurality of dimming blocks 200, and each dimming block 200 may include at least one light source.

The dimming driver 170 may receive dimming data from the image processor 90 and drive the light emitting device 100 according to the dimming data. The dimming data may include information on the luminance of each of the plurality of dimming blocks 200 or information on the luminance of the light source included in each of the plurality of dimming blocks 200.

The dimming driver 170 may convert dimming data (hereinafter, referred to as digital dimming data) as a digital signal into an analog dimming signal as an analog voltage signal and supply the analog dimming signal to the light emitting device 100. Depending on the analog dimming signal, the intensity of light emitted by the light source included in each of the plurality of dimming blocks 200 may vary.

In particular, the dimming driver 170 may not directly supply the analog dimming signal to all of the plurality of dimming blocks 200, but may sequentially supply the analog dimming signal to the plurality of dimming blocks 200 in an active matrix scheme.

As described above, a plurality of dimming blocks 200 may be arranged in the light emitting device 100 in a matrix form. In other words, the plurality of dimming blocks 200 may be arranged in a plurality of rows and columns in the light emitting device 100.

The dimming driver 170 may sequentially supply the analog dimming signal to the dimming block belonging to each of the plurality of rows, or sequentially supply the analog dimming signal to the dimming block belonging to each of the plurality of columns.

For example, the dimming driver 170 may input to activate a dimming block belonging to one row among the plurality of dimming blocks 200, and provide an analog dimming signal to the input-activated dimming block. Subsequently, the dimming driver 170 may input to activate a dimming block belonging to one row among the plurality of dimming blocks, and supply an analog dimming signal to the input-activated dimming block.

The dimming driver 170 sequentially supplying the analog dimming signals to the plurality of dimming blocks 200 in the active matrix scheme will now be described in detail.

Fig. 10 illustrates an example of a dimming driver and a light emitting device included in a display device according to an embodiment. Fig. 11 illustrates an example of a driving device included in a display apparatus according to an embodiment.

Referring to fig. 10 and 11, the display apparatus 10 includes a dimming driver 170, a plurality of driving

devices

310, 320, 330, and 340 (collectively 300), and a plurality of light sources 111.

The plurality of light sources may each include an LED, and may be divided into a plurality of dimming blocks 200. A plurality of light sources belonging to the same dimming block may form a group.

The plurality of driving devices 300 may receive the analog dimming signal from the dimming driver 170 and may apply a driving current to the plurality of light sources 111 according to the received analog dimming signal.

As shown in fig. 10, a plurality of light sources belonging to a dimming block may receive current from the same driving device. For example, a plurality of light sources belonging to the first dimming block 210 may receive a driving current from the first driving device 310. The plurality of light sources belonging to the second dimming block 220 may receive the driving current from the second driving device 320. The plurality of light sources belonging to the third dimming block 230 may receive the driving current from the third driving device 330. The plurality of light sources belonging to the fourth dimming block 240 may receive the driving current from the fourth driving device 340. In this way, the plurality of light sources belonging to the nth dimming block can receive the driving current from the nth driving device.

Therefore, a plurality of light sources belonging to a dimming block can receive driving currents having the same magnitude. In addition, a plurality of light sources belonging to one dimming block may emit light having the same intensity.

The driving device 300 may receive the analog dimming signal from the dimming driver 170 and store the received analog dimming signal when activated by the dimming driver 170 input. Further, the plurality of driving devices 300 may apply driving currents corresponding to the stored analog dimming signals to the plurality of light sources when activated by an input.

There are a plurality of scan lines S1 and S2 for supplying scan signals from the dimming driver 170 to the plurality of driving devices 300 and a plurality of data lines D1 and D2 for supplying analog dimming signals from the dimming driver 170 to the plurality of driving devices 300.

The plurality of dimming blocks 200 may be arranged in a plurality of rows and columns. The driving devices that apply the driving current to the light sources of the dimming blocks belonging to the same row may share the same scanning line. For example, the first and

second driving devices

310 and 320 may share the first scan line S1, and the third and

fourth driving devices

330 and 340 may share the second scan line S2.

Further, the driving devices that apply the driving current to the light sources of the dimming blocks belonging to the same column may share the same data line. For example, the first and

third driving devices

310 and 330 may share the first data line D1, and the second and

fourth driving devices

320 and 340 may share the second data line D2.

The plurality of driving devices 300 may be activated by a scan signal input of the dimming driver 170 and may receive an analog dimming signal from the dimming driver 170.

For example, when the dimming driver 170 is outputting a scan signal through the first scan line S1, the first and

second driving devices

310 and 320 may receive analog dimming signals through the first and second data lines D1 and D2, respectively. On the other hand, the third and

fourth driving devices

330 and 340 cannot receive the analog dimming signal.

In addition, when the dimming driver 170 is outputting the scan signal through the second scan line S2, the third and

fourth driving devices

330 and 340 may receive the analog dimming signal through the first and second data lines D1 and D2, respectively. On the other hand, the first and

second driving devices

310 and 320 cannot receive the analog dimming signal.

Upon receiving the analog dimming signal, the plurality of driving devices 300 may store the received analog dimming signal and may apply a driving current to the plurality of light sources according to the stored analog dimming signal.

For example, even when the dimming driver 170 is outputting a scan signal through the first scan line S1, the third and

fourth driving devices

330 and 340 may apply driving currents to the plurality of light sources included in the third and fourth dimming blocks 230 and 240.

In addition, even when the dimming driver 170 is outputting the scan signal through the second scan line S2, the first and

second driving devices

310 and 320 may apply the driving current to the plurality of light sources included in the first and second dimming blocks 210 and 220.

According to such an operation based on the active matrix scheme, the plurality of driving devices 300 may sequentially receive the analog dimming signal from the dimming driver 170, and may apply the driving current to the plurality of light sources even when in an input deactivated state in which the analog dimming signal is not received from the dimming driver 170.

In addition, according to the operation based on the active matrix scheme, the number of pins of the dimming driver 170 supplying the analog dimming signal to the plurality of dimming blocks 200 is reduced. In addition, the number of signal lines supplying the analog dimming signal from the dimming driver 170 to the plurality of dimming blocks 200 is reduced. Accordingly, the number of dimming blocks may be increased without being limited to the number of pins of the dimming driver 170.

The plurality of driving devices 300 may include various topology circuits to perform an operation based on the active matrix scheme.

For example, as shown in fig. 11, each of the plurality of driving devices 300 may include a single capacitor two transistor (1C 2T) topology circuit.

Each of the plurality of driving devices 300 may include a driving transistor Tdr, a switching transistor Tsw, and a storage capacitor Cs.

The driving transistor Tdr includes an input terminal, an output terminal, and a control terminal. The input terminal of the driving transistor Tdr may be connected to the power supply Vdd, and the output terminal may be connected to the plurality of light sources. The driving transistor Tdr may apply a driving current to the plurality of light sources based on the voltage at the control terminal.

The storage capacitor Cs is provided between the output terminal and the control terminal of the driving transistor Tdr. The storage capacitor Cs can output a constant voltage by storing input charges. The driving transistor Tdr may apply a driving current to the plurality of light sources based on the voltage output by the storage capacitor Cs.

The switching transistor Tsw also includes an input terminal, an output terminal, and a control terminal. An input terminal of the switching transistor Tsw may be connected to the data line D1 or D2, and an output terminal of the switching transistor Tsw may be connected to a control terminal of the driving transistor Tdr. The control terminal of the switching transistor Tsw may be connected to the scan line S1 or S2.

The switching transistor Tsw may be turned on by a scan signal of the scan line S1 or S2, and may transfer an analog dimming signal of the data line D1 or D2 to the storage capacitor Cs and the driving transistor Tdr. The analog dimming signal of the data line D1 or D2 is input to a control terminal of the driving transistor Tdr, and the driving transistor Tdr may apply a driving current corresponding to the analog dimming signal to the plurality of light sources. The storage capacitor Cs may store charges from the analog dimming signal and output a voltage corresponding to the analog dimming signal.

Thereafter, even when the input of the scan signal is stopped and the switching transistor Tsw is turned off, the storage capacitor Cs may still output a voltage corresponding to the analog dimming signal, and the driving transistor Tdr may still apply a driving current corresponding to the analog dimming signal to the plurality of light sources.

The circuit shown in fig. 11 is only an example of the driving device 300, and is not limited thereto. For example, the driving device 300 may include a 3T1C topology circuit obtained by adding a transistor for compensating the body effect of the driving transistor Tdr.

The driving device 300 may be provided, for example, in a single chip in which the circuit shown in fig. 11 is integrated. In other words, the circuit shown in fig. 11 may be integrated in a single semiconductor chip.

As described above, the plurality of light sources 111 are arranged on the board 112. Specifically, the plurality of light sources 111 are arranged on the front surface (surface from which the light source module emits light) of the board 112.

To efficiently wire, the dimming driver 170 may be disposed on a rear surface (a surface from which the light source module does not emit light, or an opposite surface to the surface from which the light source module emits light) of the board 112. Returning to fig. 2, the board 112 on which the driving device 300, the plurality of light sources 111, and the dimming driver 170 are mounted may be supported by the bottom chassis 15. The chassis 15 may also support the control assembly 50 and the power assembly 60. Specifically, the board 112 may be disposed on a front surface of the chassis 15, and the control assembly 50 may be disposed on a rear surface of the chassis 15.

The dimming driver 170 may receive dimming data from the image processor 90 included in the control assembly 50 and power from the power assembly 60. Therefore, for efficient wiring, the dimming driver 170 may be disposed on the rear surface of the board 112 and may be connected to the control assembly 50 and the power assembly 60 by wires passing through the opening 15a formed at the bottom chassis 15.

The dimming driver 170 disposed on the rear surface of the panel 112 is disposed at a position corresponding to the position of the opening 15 a. This may prevent the light emitting device 100 from becoming thicker due to the dimming driver 170 disposed on the rear surface of the board 112.

In order to minimize the thickness of the light emitting apparatus 100, the driving device 300 may be disposed on the same surface (front surface) as the plurality of light sources 111, as shown in fig. 12. The thickness of the light source module 110 when the driving device 300 is mounted on the same surface as the plurality of light sources 111 is thinner than the thickness of the light source module 110 when the driving device 300 is mounted on a different surface from the plurality of light sources 111.

In this way, when the driving device 300 is disposed on the same surface (front surface) as the plurality of light sources 111, there may be optical defects due to the driving device 300.

As shown in fig. 12, the reflective sheet 120 is disposed on the plate 112. In order to secure an optical distance between the reflective sheet 120 and the diffusion plate 130, the reflective sheet 120 may be closely attached to the plate 112. Accordingly, the concave portion 301 of the reflective sheet 120 may be formed where the driving device 300 is disposed.

The concave portion 301 on the reflective sheet 120 may cause optical defects in the light emitting device 100. As a simple example, as shown in fig. 12, a portion of the light emitted from the light source may be reflected from the surface of the diffusion plate 130. The light reflected from the surface of the diffusion plate 130 may be reflected again from the reflection sheet 120. In this case, the concave portion 301 of the reflection sheet 120 may form an area where light that has been reflected from the surface of the diffusion plate 130 does not reach (or an area where weak intensity light reaches, which will be referred to as a dark area hereinafter).

When there are sporadic dark areas, the diffusion of light on the diffusion plate 130 and the optical sheet 140 may prevent the dark areas from being displayed on the screen 12 of the display device 10. However, when there is a regular dark area, the dark area may be displayed on the screen 12 of the display device 10.

The drive device 300 is arranged such that dark areas from the arrangement of the drive device 300 are not displayed on the screen 12 of the display apparatus 10.

Referring to fig. 13, the light source module 110 includes a plurality of light sources 111 arranged in a matrix form on a board 112.

In this case, the plurality of light sources 111 may be classified into the plurality of dimming blocks 200. In other words, the front surface (surface from which light is emitted) of the light source module 110 may be divided into a plurality of dimming regions 400 by the plurality of dimming blocks 200.

In addition, the light source module 110 may further include a plurality of driving devices 300 for applying a driving current to the light sources, and each of the plurality of driving devices 300 may apply a driving current to the light sources included in the dimming block. Each driving device 300 is located in a dimming region of the dimming block.

In order to prevent or suppress optical defects due to the arrangement of the driving devices 300, the driving devices 300 may be irregularly arranged in the dimming area. The relative positions of the driving devices in different dimming blocks may be different from each other.

For example, as shown in fig. 13, the front surface (surface from which light is emitted) of the light source module 110 is divided into a first light adjusting region 410 corresponding to the first light adjusting block 210, a second light adjusting region 420 corresponding to the second light adjusting block 220, a third light adjusting region 430 corresponding to the third light adjusting block 230, and a fourth light adjusting region 440 corresponding to the fourth light adjusting block 240.

A driving device for applying a driving current to a plurality of light sources (twelve light sources as shown in fig. 13) is located in each light adjusting region 400. In the first dimming region 410, the first driving device 310 may be arranged to apply a driving current to the light source belonging to the first dimming block 210. In the same manner, in the second dimming region 420, the third dimming region 430 and the fourth dimming region 440, the second driving device 320, the third driving device 330 and the fourth driving device 340 may be arranged to apply a driving current to light sources belonging to the second dimming block 220, the third dimming block 230 and the fourth dimming block 240.

The first driving device 310 is disposed in a lower right portion from the center of the first dimming region 410, and the second driving device 320 is disposed in an upper left portion from the center of the second dimming region 420. Further, the third driving device 330 is disposed in an upper right portion from the center of the third light adjusting region 430, and the fourth driving device 340 is disposed in a lower left portion from the center of the fourth light adjusting region 440.

The arrangement of the first driving device 310 in the first dimming region 410 is different from the arrangement of the second driving device 320 and the third driving device 330 in the second dimming region 420 and the third dimming region 430 adjacent to the first dimming region 410. Further, the arrangement of the second driving devices 320 in the second dimming region 420 is different from the arrangement of the driving devices in the adjacent dimming regions of the second dimming region 420.

In this way, the arrangement of the driving devices in the dimming region is different from the arrangement of the driving devices in the other dimming regions adjacent to the aforementioned dimming region. Here, different arrangements mean that the relative positions of the driving devices from the center of the dimming area are different.

The first light adjusting area 410, the second light adjusting area 420, the third light adjusting area 430, and the fourth light adjusting area 440 are arranged in a plurality of rows and columns.

The arrangement of the first driving devices 310 in the first dimming region 410 is different from the arrangement of the second driving devices 320 in the second dimming region 420, the second dimming region 420 belonging to the same row as the first dimming region 410 and being adjacent to the first dimming region 410. Further, the arrangement of the first driving device 310 in the first dimming region 410 is different from the arrangement of the third driving device 330 in the third dimming region 430, the third dimming region 430 belonging to the same column as the first dimming region 410 and being adjacent to the first dimming region 410.

In this way, the arrangement of the driving devices in one of the plurality of dimming regions arranged in a plurality of rows and columns is different from the arrangement of the driving devices in another dimming region belonging to the same row or column as the one dimming region and adjacent to the one dimming region.

Further, the driving device in one of the plurality of dimming regions arranged in a plurality of rows and columns is arranged outside a virtual line defined by two driving devices in two dimming regions belonging to the same row as the one dimming region and adjacent to the one dimming region.

The first driving device 310 in the first dimming region 410 in the first row and the first column is disposed at the right side of the center of the self-dimming region, and the second driving device 320 in the second dimming region 420 in the first row and the second column is disposed at the left side of the center of the self-dimming region.

In this way, the driving devices in the plurality of dimming areas arranged in the same row are alternately arranged on the left and right sides of the center of the dimming area.

The first driving device 310 in the first dimming zone 410 in the first row and the first column is disposed in a lower portion from the center of the dimming zone, and the third driving device 330 in the third dimming zone 430 in the second row and the first column is disposed in an upper portion from the center of the dimming zone.

In this way, the driving devices arranged in the plurality of dimming regions in the same column are alternately arranged above and below the center of the dimming region.

The first driving device 310 is disposed closest to the second driving device 320 and the third driving device 330, and the first to

third driving devices

310, 320 and 330 are not disposed on a straight line. In other words, the first driving device 310 is disposed outside a virtual line connecting the second driving device 320 and the third driving device 330 closest to the first driving device 310.

In this way, one of the plurality of driving devices is arranged outside a virtual line defined by two driving devices closest to the one driving device.

As described above, the plurality of driving devices may be irregularly arranged in the plurality of dimming areas or arranged at arbitrary positions in the plurality of dimming areas.

As shown in fig. 14, the driving devices of four adjacent dimming areas in the same row may be arranged at different positions with respect to the center of the dimming area.

The first light modulation zone 410, the second light modulation zone 420, the fifth light modulation zone 450, and the sixth light modulation zone 460 may be arranged in the same row. The first driving device 310 may be located above the center of the first dimming region 410, the second driving device 320 may be located at the left side from the center of the second dimming region 420, the fifth driving device 350 may be located below the center of the fifth dimming region 450, and the sixth driving device 360 may be located at the right side from the center of the sixth dimming region 460.

The driving devices of four adjacent dimming zones in the same column may be arranged at different positions with respect to the center of the dimming zone.

The first dimming region 410, the third dimming region 430, the ninth dimming region 490, and the eleventh dimming region 490b may be arranged in the same column. The first driving device 310 may be located above the center of the first dimming region 410, the third driving device 330 may be located at the right side of the center of the third dimming region 430, the ninth driving device 390 may be located below the center of the ninth dimming region 490, and the eleventh driving device 390b may be located at the left side of the center of the eleventh dimming region 490 b.

Thus, the arrangement of the driving devices in the dimming region is different from that in the other dimming regions adjacent to the aforementioned dimming region.

An arrangement of driving devices in one of the plurality of dimming regions arranged in a plurality of rows and columns is different from an arrangement of driving devices in another dimming region belonging to the same row or column as the one dimming region and adjacent to the one dimming region.

One of the plurality of driving devices is arranged outside a virtual line defined by two driving devices closest to the one driving device.

As shown in fig. 15, the driving devices of four adjacent dimming areas may be arranged at different positions with respect to the center of the dimming area.

The first light modulation zone 410, the second light modulation zone 420, the third light modulation zone 430, and the fourth light modulation zone 440 may be arranged adjacent to each other. The first driving device 310 may be located in a right lower portion from the center of the first dimming region 410, the second driving device 320 may be located in a right upper portion from the center of the second dimming region 420, the third driving device 330 may be located in a left upper portion from the center of the third dimming region 430, and the fourth driving device 340 may be located in a left lower portion from the center of the fourth dimming region 440.

The second light modulation zone 420, the fourth light modulation zone 440, the fifth light modulation zone 450, and the seventh light modulation zone 470 may be arranged adjacent to each other. The second driving device 320 may be located in a right upper portion from the center of the second dimming region 420, the fourth driving device 340 may be located in a left lower portion from the center of the fourth dimming region 440, the fifth driving device 350 may be located in a right lower portion from the center of the fifth dimming region 450, and the seventh driving device 370 may be located in a left upper portion from the center of the seventh dimming region 470.

The third, fourth, ninth, and

tenth dimming regions

430, 440, 490, and 490a may be disposed adjacent to each other. The third driving device 330 may be located in an upper left portion from the center of the third dimming region 430, the fourth driving device 340 may be located in a lower left portion from the center of the fourth dimming region 440, the ninth driving device 390 may be located in a lower right portion from the center of the ninth dimming region 490, and the tenth driving device 390a may be located in an upper right portion from the center of the tenth dimming region 490 a.

By such an arrangement of the driving device 300, optical defects due to the driving device 300 can be prevented or suppressed.

Although it is described above that the driving device applies the driving current to the light source belonging to one dimming block, it is not limited thereto. For example, the driving device may apply a driving current to the light sources belonging to the plurality of dimming blocks.

Fig. 16 illustrates an example of a dimming driver and a light emitting device included in a display device according to an embodiment. Fig. 17 illustrates an example of a driving device included in a display apparatus according to an embodiment.

Referring to fig. 16 and 17, the display apparatus 10 includes a dimming driver 170, a plurality of driving devices 500 (510 and 520), and a plurality of light sources 111.

The plurality of light sources 111 may be the same as the plurality of light sources shown in fig. 10.

The plurality of driving devices 500 may receive the analog dimming signal from the dimming driver 170 and may apply a driving current to the plurality of light sources 111 according to the received analog dimming signal.

As shown in fig. 16, each driving device 500 may apply a driving current to the light sources included in the plurality of dimming blocks 200. For example, the first driving device 510 may apply a driving current to the plurality of light sources belonging to the first dimming block 210 and the plurality of light sources belonging to the second dimming block 220. The second driving device 520 may apply a driving current to the plurality of light sources belonging to the third dimming block 230 and the plurality of light sources belonging to the fourth dimming block 240. In the same manner, the nth driving device may apply a driving current to the plurality of light sources belonging to the (2 n-1) th dimming block and the plurality of light sources belonging to the 2 nth dimming block.

In this case, the driving device 500 may apply different driving currents to the light sources belonging to different dimming blocks based on the analog dimming signal. For example, the first driving device 510 may apply a first driving current to the light source belonging to the first dimming block 210 according to the analog dimming signal and apply a second driving current to the light source belonging to the second dimming block 220 according to the analog dimming signal.

When activated by the dimming driver 170 input, the plurality of driving devices 500 may receive the analog dimming signal from the dimming driver 170 and store the received analog dimming signal. Further, the plurality of driving devices 500 may apply driving currents corresponding to the stored analog dimming signals to the plurality of light sources when activated by an input.

The plurality of driving devices 500 may be activated by a scan signal input of the dimming driver 170 and may receive an analog dimming signal from the dimming driver 170. When the analog dimming signal is received, the plurality of driving devices 500 may store the received analog dimming signal and may apply a driving current to the plurality of light sources according to the stored analog dimming signal.

For example, when the dimming driver 170 outputs a scan signal through the first scan line S1, the first driving device 510 may receive an analog dimming signal through the first data line D1. The first driving device 510 may apply a driving current to the light source of the first dimming block 210 and the light source of the second dimming block 220 according to the received analog dimming signal. The second driving device 520 may not receive the analog dimming signal, but may still apply a driving current to the light source of the third dimming block 230 and the light source of the fourth dimming block 240.

In addition, when the dimming driver 170 outputs the scan signal through the second scan line S2, the second driving device 520 may receive the analog dimming signal through the first data line D1. The second driving device 520 may apply driving currents to the light sources of the third and fourth dimming blocks 230 and 240 according to the received analog dimming signal. The first driving device 510 may not receive the analog dimming signal, but may still apply a driving current to the light source of the first dimming block 210 and the light source of the second dimming block 220.

According to such an operation based on the active matrix scheme, the number of pins of the dimming driver 170 supplying the analog dimming signal to the plurality of dimming blocks 200 is reduced.

Further, since one driving device applies a driving current to the light sources of the plurality of dimming blocks, the number of driving devices is reduced. In addition, optical defects due to the arrangement of the driving device can also be reduced.

The plurality of driving devices 500 may include various topology circuits to perform an operation based on the active matrix scheme.

For example, as shown in fig. 17, each of the plurality of driving devices 500 may include a pair of 1C2T topology circuits.

Each driving device 500 may include a first driving transistor Tdr1, a first switching transistor Tsw1, a first storage capacitor Cs1, a second driving transistor Tdr2, a second switching transistor Tsw2, and a second storage capacitor Cs2.

Each of the first and second driving transistors Tdr1 and Tdr2, the first and second switching transistors Tsw1 and Tsw2, and the first and second storage capacitors Cs1 and Cs2 may be the same as the driving transistor Tdr, the switching transistor Tsw, and the storage capacitor Cs as shown in fig. 11.

The first driving transistor Tdr1, the first switching transistor Tsw1, and the first storage capacitor Cs1 may apply a driving current to a light source of a dimming block different from that of the second driving transistor Tdr2, the second switching transistor Tsw2, and the second storage capacitor Cs2.

The circuit shown in fig. 17 is only an example of the driving device 500, and is not limited thereto. For example, the driving device 500 may include a 3T1C topology circuit obtained by adding transistors for compensating for the body effect of the driving transistors Tdr1 and Tdr 2.

The driving device 500 may be provided, for example, in a single chip in which the circuit shown in fig. 17 is integrated. In other words, the circuit shown in fig. 17 may be integrated in a single semiconductor chip.

The driving device 500 is arranged such that dark regions from the arrangement of the driving device 500 are not displayed on the screen 12 of the display apparatus 10.

Referring to fig. 18, the light source module 110 includes a plurality of light sources 111 arranged in a matrix form on a board 112.

In this case, the plurality of light sources 111 may be classified into the plurality of dimming blocks 200. In other words, the front surface (surface from which light is emitted) of the light source module 110 may be divided into a plurality of dimming regions 400 occupied by a plurality of dimming blocks 200.

In addition, the light source module 110 may further include a plurality of driving devices 500 for applying a driving current to the light sources, and each of the plurality of driving devices 500 may apply a driving current to the light sources included in the two dimming blocks. Each of the driving devices 500 is located in two dimming areas of two dimming blocks.

In order to prevent or suppress optical defects due to the arrangement of the driving device 500, the driving device 500 may be irregularly arranged in the dimming region. The relative positions of the driving devices in different dimming blocks may be different from each other.

For example, as shown in fig. 18, the front surface (surface from which light is emitted) of the light source module 110 is divided into a first light adjusting region 410, a second light adjusting region 420, a third light adjusting region 430, a fourth light adjusting region 440, a fifth light adjusting region 450, a sixth light adjusting region 460, a seventh light adjusting region 470, an eighth light adjusting region 480, and the like.

The light sources in the two dimming areas are driven by a single driving device. In other words, the driving device may apply the driving current to a plurality of light sources (24 light sources as shown in fig. 18) arranged in two dimming regions. The first driving device 510 may apply a driving current to light sources in the first and second

light adjusting regions

410 and 420, the second driving device 520 may apply a driving current to light sources in the third and fourth

light adjusting regions

430 and 440, the third driving device 530 may apply a driving current to light sources in the fifth and sixth

light adjusting regions

450 and 460, and the fourth driving device 540 may apply a driving current to light sources in the seventh and eighth

light adjusting regions

470 and 480.

In this case, the first driving device 510 is located in the second dimming region 420, the second driving device 520 is located in the third dimming region 430, the third driving device 530 is located in the sixth dimming region 460, and the fourth driving device 540 is located in the seventh dimming region 470.

Thus, no driving device is located in an adjacent dimming region to the dimming region where the driving device is located. Further, the driving device is located in a dimming region adjacent to the dimming region in which no driving device is located.

In other words, in the same row, the dimming regions in which the driving devices are located and the dimming regions in which no driving device is located are alternately arranged. Further, in the same column, the dimming regions in which the driving devices are located and the dimming regions in which no driving device is located are alternately arranged.

The first driving device 510 is located at the left side from the center of the second dimming region 420, and the second driving device 520 is located at the right side from the center of the third dimming region 430. In addition, the third driving device 530 is located at the left side of the center of the sixth dimming region 460, and the fourth driving device 540 is located at the right side of the center of the seventh dimming region 470.

Specifically, as shown in fig. 18, the driving devices may be arranged in a zigzag form along the dimming areas of a pair of adjacent columns.

In this way, the arrangement of one driving device in one dimming region may be different from the arrangement of another driving device adjacent to the one driving device in another dimming region.

As shown in fig. 19, the first driving device 510 may be located in a lower portion of the first dimming region 410, the second driving device 520 may be located in an upper portion of the fourth dimming region 440, the third driving device 530 may be located in a lower portion of the fifth dimming region 450, and the fourth driving device 540 may be located in an upper portion of the eighth dimming region 480.

Thus, the dimming regions in which the driving device is located and the dimming regions in which no driving device is located are alternately arranged.

Further, the arrangement of one driving device in one dimming region may be different from the arrangement of another driving device adjacent to the one driving device in another dimming region.

By such an arrangement of the driving device 500, optical defects due to the driving device 500 can be prevented or suppressed.

As shown in fig. 20, the first driving device 510 may be located in a lower portion of the first dimming region 410, the second driving device 520 may be located in an upper portion of the fourth dimming region 440, the third driving device 530 may be located in an upper portion of the fifth dimming region 450, and the fourth driving device 540 may be located in a lower portion of the eighth dimming region 480.

Further, the arrangement of the driving devices in one dimming region may be different from the arrangement of another driving device adjacent to the one driving device in another dimming region.

Fig. 21 illustrates an example of an arrangement of a driving device included in a display apparatus according to an embodiment.

Referring to fig. 21, the display apparatus 10 includes a plurality of driving devices 600 (610, 620, 630, and 640) and a plurality of light sources 111.

Each of the driving devices 600 may apply a driving current to the light sources included in the four dimming blocks. Here, an area defined by the light sources included in the four dimming blocks driven by a single driving device may be defined as a driving region 700.

For example, the first driving device 610 may apply a driving current to the light sources disposed in the first driving region 710 including four dimming blocks, and the second driving device 620 may apply a driving current to the light sources disposed in the second driving region 720 including four dimming blocks. In addition, the third driving device 630 may apply a driving current to the light sources disposed in the third driving region 730 including four dimming blocks, and the fourth driving device 640 may apply a driving current to the light sources disposed in the fourth driving region 740 including four dimming blocks.

The arrangement of the driving device 600 differs depending on the driving region 700. The position of a drive device in one drive region is different from the position of a drive device in another drive region adjacent to the former drive region.

For example, the first driving device 610 may be located in an upper left portion of the first driving region 710, and the second driving device 620 may be located in a lower left portion of the second driving region 720. The third driving device 630 may be located in an upper right portion of the third driving region 730, and the fourth driving device 640 may be located in a lower right portion of the fourth driving region 740.

By such an arrangement of the driving device 600, optical defects due to the driving device 600 can be prevented or suppressed.

A display device according to an embodiment includes a liquid crystal panel and a light emitting device. In this case, the light emitting device may include: a plate; a plurality of light-adjusting blocks, each of the plurality of light-adjusting blocks including at least one light source provided on a first surface of a board; and a plurality of driving devices provided on the first surface of the board, each of the plurality of driving devices applying a driving current to the at least one light source included in each of the plurality of dimming blocks. Further, the plurality of driving devices may be respectively arranged at different relative positions within the plurality of dimming areas defined by the plurality of dimming blocks.

For example, the arrangement of the driving devices in one of the plurality of dimming regions is different from the arrangement of the driving devices in the other dimming regions adjacent to the one dimming region.

For example, the plurality of dimming regions may be arranged in a plurality of rows and columns, and an arrangement of the driving devices in one dimming region of the plurality of dimming regions may be different from an arrangement of the driving devices in the other dimming region adjacent to the one dimming region arranged in the same row or column as the one dimming region.

For example, one of the plurality of driving devices may be arranged outside a virtual line defined by two driving devices closest to the one driving device.

Therefore, optical defects due to the plurality of driving devices can be prevented or suppressed.

The plurality of dimming blocks may emit light having at least different brightness. In other words, local dimming is achieved.

Each of the plurality of driving devices may apply a driving current to the light sources included in the at least two dimming blocks.

Therefore, the number of the plurality of driving devices can be reduced, and in addition, optical defects due to the plurality of driving devices can also be reduced.

One of the plurality of driving devices may be disposed in a dimming region defined by one of the at least two dimming blocks.

In this case, the dimming regions in which the driving devices are arranged and the dimming regions in which the one driving device is not arranged may be alternately arranged.

Further, the arrangement of the driving devices in the driving region defined by the at least two dimming blocks may be different from the arrangement of the driving devices in other driving regions adjacent to the driving region.

The dimming driver may be further included on the second surface of the board to provide the dimming signal to the plurality of driving devices.

Thus, efficient wiring between the dimming driver and the control/power components may be possible.

The dimming driver may provide the dimming signal to the plurality of driving devices in an active matrix scheme.

For example, the plurality of driving devices may be arranged in a plurality of rows and a plurality of columns, and the dimming driver may provide the scan signal to the driving devices arranged in one of the plurality of rows and the dimming signal to the driving devices arranged in the plurality of columns.

Accordingly, the number of pins for the dimming driver to supply the dimming signal to the plurality of driving devices is reduced.

The at least one light source may include an LED directly contacting the wiring on the board and an optical dome covering the LED. The LED has a DBR formed on a surface from which light is emitted.

Therefore, the LED may emit more intense light in the lateral direction than in the vertical direction.

In addition, the embodiments of the present disclosure may be implemented in the form of a recording medium for storing instructions to be executed by a computer. The instructions may be stored in the form of program code and, when executed by a processor, may generate program modules to perform the operations in the embodiments of the present disclosure. The recording medium may correspond to a computer-readable recording medium.

The computer-readable recording medium includes any type of recording medium having data stored thereon, which can be thereafter read by a computer. For example, it may be a ROM, RAM, magnetic tape, magnetic disk, flash memory, optical data storage device, or the like.

The machine-readable storage medium may be provided in the form of a non-transitory storage medium. The term "non-transitory storage medium" may refer to a tangible device that does not include a signal (e.g., an electromagnetic wave), and may not distinguish between semi-permanently and temporarily storing data in the storage medium. For example, a non-transitory storage medium may include a buffer to temporarily store data.

In an embodiment of the present disclosure, the aforementioned methods according to various embodiments of the present disclosure may be provided in a computer program product. The computer program product may be a commercial product that is tradable between a seller and a buyer. The computer program product may be in the form of a storage medium, such as a compact disc read only memory (CD-ROM), for example, for use by an application store, such as a play store ^TM ) Directly between two user devices (e.g., smartphones), or online (e.g., downloaded or uploaded). In the case of online distribution, at least part of the computer program product (e.g. a downloadable application) may be at least temporarily stored or created arbitrarily in a storage medium, which may be readable by a device, such as a server of a manufacturer, a server of an application store or a relay server.

So far, embodiments of the present disclosure have been described with reference to the drawings. It will be apparent to those skilled in the art that the present disclosure may be embodied in other forms than the embodiments described above without changing the technical spirit or essential features of the present disclosure. The above embodiments are exemplary only and should not be construed in a limiting sense.

Claims

1. A display device, comprising:

a liquid crystal panel;

a plurality of light sources configured to emit light;

a substrate including a plurality of driving regions on a first side of the substrate, each of the plurality of driving regions including a plurality of dimming blocks, and each of the plurality of dimming blocks including at least one light source of the plurality of light sources; and

a plurality of driving devices each provided in a corresponding one of the plurality of driving regions and configured to control a driving current of the at least one light source in each dimming block in the corresponding driving region, each of the plurality of driving devices being disposed between light sources within the corresponding driving region,

wherein a first drive device of the plurality of drive devices is disposed at a first location in a first drive region of the plurality of drive regions,

wherein a second drive device of the plurality of drive devices is disposed at a second location in a second drive region of the plurality of drive regions,

wherein a fourth drive device of the plurality of drive devices is disposed at a fourth location in a fourth drive zone of the plurality of drive zones,

wherein the second drive region is adjacent to the first drive region in a row direction, the first drive region is adjacent to the fourth drive region in a column direction, an

Wherein the first and second locations are located in relatively different areas of the first and second drive regions, respectively, and the first and fourth locations are located in relatively different areas of the first and fourth drive regions, respectively.

2. The display device of claim 1, wherein each of the plurality of drive regions is defined by the at least one light source in each of the dimming blocks in the drive region receiving a drive current from a respective drive device in the plurality of drive devices.

3. The display device according to claim 1, wherein each of the plurality of dimming blocks is defined by each of the at least one light source in the dimming block receiving a same driving current from a same driving device of the plurality of driving devices.

4. The display device according to claim 3, wherein the plurality of driving devices are configured to supply different driving currents to the light sources in different dimming blocks.

5. The display device of claim 1, wherein each of the plurality of drive regions comprises four dimming blocks.

6. The display device according to claim 1, wherein the first position is located on an upper half region of the first driving region, and the second position is located on a lower half region of the second driving region.

7. The display device according to claim 1, wherein the first location is located on a right half region of the first drive region and the second location is located on a left half region of the second drive region.

8. The display device according to claim 1, wherein the plurality of driving devices and the plurality of light sources are provided on the first side of the substrate.

9. The display device of claim 8, wherein each of the plurality of driving devices is configured to receive a signal through the second side of the substrate.

10. The display device of claim 1, wherein a third drive device of the plurality of drive devices is disposed at a third location in a third drive region of the plurality of drive regions that is adjacent to the second drive region, and

the third drive means is spaced from a line defined by the first and second drive means.

11. The display device according to claim 1, wherein the each of the plurality of driving devices comprises:

a first transistor;

a capacitor coupled to a control terminal of the first transistor; and

a second transistor coupled to the control terminal of the first transistor.

12. The display device according to claim 1, wherein the plurality of driving devices are controlled by an active matrix method.

13. The display apparatus of claim 1, wherein each of the plurality of light sources comprises a light emitting diode disposed on the substrate in a chip-on-board (COB) method and an optical dome having a vertical cross-section that is arcuate or semi-circular in shape.

14. The display device according to claim 13, wherein an intensity of a first light beam emitted from the light emitting diode in a first direction perpendicular to the substrate is smaller than an intensity of a second light beam emitted from the light emitting diode in a second direction different from the first direction.

15. A display device, comprising:

a liquid crystal panel;

a plurality of light sources configured to emit light;

a plurality of driving devices, each of the plurality of driving devices provided in a corresponding one of the plurality of driving regions and configured to control a driving current of the at least one light source in each of the dimming blocks in the corresponding driving region,

a second drive device of the plurality of drive devices is disposed at a second location in a second drive region of the plurality of drive regions,

a third drive device of the plurality of drive devices is disposed at a third location in a third drive region of the plurality of drive regions,

a fourth drive device of the plurality of drive devices is disposed at a fourth location in a fourth drive zone of the plurality of drive zones,

the first and second drive regions are arranged on a first row,

the third and fourth drive regions are arranged on a second row,

the first and third driving regions are disposed on a first column,

the second and fourth driving regions are disposed on a second column,

the second drive region is adjacent to the first drive region,

the first and second positions are located in relatively different regions of the first and second drive regions respectively,

the first and third positions are located in relatively different regions of the first and third drive regions respectively,

the second and fourth locations are located in relatively different regions of the second and fourth drive regions, respectively, an

The third and fourth locations are located in relatively different areas of the third and fourth drive regions, respectively.

16. The display device of claim 15, further comprising:

a first scan line coupled to the first driving device and the second driving device;

a second scan line coupled to the third driving device and the fourth driving device;

a first data line coupled to the first and third driving devices, an

A second data line coupled to the second driving device and the fourth driving device.

17. The display device of claim 16, further comprising a dimming driver configured to:

activating the first and second driving devices through the first scan line and providing dimming signals to the first and second driving devices through the first and second data lines, respectively, during a first duration, and

activating the third and fourth driving devices through the second scan line and providing a dimming signal to each of the third and fourth driving devices through the first and second data lines, respectively, during a second duration.

18. A display device, comprising:

a liquid crystal panel;

a plurality of light sources configured to emit light;

a substrate including a plurality of driving regions on a first side of the substrate, the plurality of driving regions including a first driving region and a second driving region and a third driving region respectively disposed adjacent to the first driving region in a row direction and a column direction, each driving region including a plurality of dimming blocks, each of the plurality of dimming blocks including at least one light source; and

a plurality of driving devices, each driving device associated with a respective one of the plurality of driving regions and including a first driving device, a second driving device, and a third driving device, each driving device configured to control a driving current of at least one light source in a respective dimming block in a respective driving region, each driving device of the plurality of driving devices disposed between light sources within the respective driving region,

wherein the first drive device is disposed at a first location in the first drive region, the second drive device is disposed at a second location in the second drive region, the third drive device is disposed at a third location in the third drive region, an

Wherein the first location in the first drive zone and the second location in the second drive zone are relatively different locations, the first location in the first drive zone and the third location in the third drive zone being relatively different locations.

19. A light emitting device comprising:

a plurality of light sources configured to emit light;

wherein a third drive device of the plurality of drive devices is disposed at a third location in a third drive region of the plurality of drive regions,

wherein the second drive region is adjacent to the first drive region in a row direction, the first drive region is adjacent to the third drive region in a column direction, an

Wherein the first and second positions are located in relatively different regions of the first and second drive regions, respectively, and the first and third positions are located in relatively different regions of the first and third drive regions, respectively.