KR20230140317A - Display apparatus and light apparatus thereof - Google Patents

Abstract

The display device includes a liquid crystal panel; A plurality of light sources emitting light; and a substrate including a plurality of dimming blocks arranged in rows and columns. Each of the plurality of dimming blocks may include at least four light sources connected in series among the plurality of light sources. At least four light sources included in one dimming block may be arranged on the first side of the substrate in rows and columns. The substrate may be provided with a plurality of holes penetrating the substrate. Each of the plurality of holes may electrically connect the first side of the substrate and the second side of the substrate. Each of the plurality of holes may be provided in an area surrounded by at least four light sources included in one dimming block.

Description

Display device and its light source device {DISPLAY APPARATUS AND LIGHT APPARATUS THEREOF}

The disclosed invention relates to a display device and its light source device, and relates to a display device that performs local dimming and its light source device.

In general, a display device is a type of output device that converts acquired or stored electrical information into visual information and displays it to a user, and is used in various fields such as homes and businesses.

Display devices include monitor devices connected to personal computers or server computers, portable computer devices, navigation terminal devices, general television devices, Internet Protocol television (IPTV) devices, smart phones, tablet PCs, etc. Portable terminal devices such as personal digital assistants (PDAs) or cellular phones, various display devices used to play images such as advertisements or movies in industrial settings, or various types of audio/video systems etc.

The display device includes a light source device for converting an electrical signal (whether a self-luminous display or a non-luminous display) into a visual signal, and the light source device includes a plurality of light sources capable of independently emitting light. The light source includes, for example, a light emitting diode (LED) or an organic light emitting diode (OLED).

In particular, local dimming technology is applied to the light source device (backlight unit) of a non-emissive display to improve the contrast ratio of the image. The plurality of light sources are divided into a plurality of dimming blocks, and the driving element can control the driving current supplied to the light sources included in one or more dimming blocks.

Drive elements and light sources (eg, light emitting diodes) may be fixed on the substrate using surface mount technology (SMT). The substrate on which the driving elements and light sources will be mounted may be fixed to an SMT device (eg, a chip mounter). Additionally, holes may be formed in the substrate into which carrier jigs for fixing the substrate to the SMT device are inserted.

Holes may interfere with the drive elements forming electrically conductive lines for supplying drive current to the light sources.

One aspect of the disclosed invention is to provide a display device and a light source device in which a hole for fixing a substrate to an SMT device is formed in a position where interference with an electrically conductive line formed on the substrate is minimized.

One aspect of the disclosed invention seeks to provide a display device and a light source device that electrically connect a first side and a second side of a substrate using a hole for fixing the substrate to an SMT device.

A display device according to one aspect of the disclosed outbreak includes a liquid crystal panel; A plurality of light sources emitting light; and a substrate including a plurality of dimming blocks arranged in rows and columns. Each of the plurality of dimming blocks may include at least four light sources connected in series among the plurality of light sources. At least four light sources included in one dimming block may be arranged on the first side of the substrate in rows and columns. The substrate may be provided with a plurality of holes penetrating the substrate. Each of the plurality of holes may electrically connect the first side of the substrate and the second side of the substrate. Each of the plurality of holes may be provided in an area surrounded by at least four light sources included in one dimming block.

The substrate includes electrically conductive lines, which may pass between a dimming block and another dimming block.

The substrate may include first lines connecting at least four light sources included in the one dimming block in series, and each of the plurality of holes may be disposed between the first lines.

Each of the plurality of dimming blocks may include nine light sources, and the nine light sources may be arranged in three rows and three columns. The first lines may connect the nine light sources in the form of the English letter “S” or the number “2.”

The display device includes: a first driving element that controls driving current supplied to at least four light sources included in each of the first dimming blocks among the plurality of dimming blocks; And it may further include a second driving element that controls driving current supplied to at least four light sources included in each of the second dimming blocks among the plurality of dimming blocks. The first dimming blocks, the second dimming blocks, the first driving element, and the second driving element may be provided on the first side of the substrate.

The first dimming blocks and the second dimming blocks may be arranged in a row. The substrate may include second lines extending from the first driving element to each of the first dimming blocks. The second lines may be provided between the first dimming blocks and the second dimming blocks.

The substrate may include third lines that transmit a dimming signal to the first driving element. The third lines may be provided between the first dimming blocks and the second dimming blocks.

The first dimming blocks may be arranged in multiple rows and multiple columns. The substrate may include second lines extending from the first driving element to each of the first dimming blocks. The second lines may be provided between first dimming blocks arranged in a plurality of rows and a plurality of columns.

The substrate may include third lines that transmit a dimming signal to the first driving element. The third lines may be provided between the first dimming blocks and the second dimming blocks.

The first driving element may be disposed between the first dimming blocks, and the second driving element may be disposed between the second dimming blocks.

The relative position of the first driving element within the first dimming blocks may be different from the relative position of the second driving element within the second dimming blocks.

Each of the first driving element and the second driving element includes: a first transistor; a capacitor connected to the control terminal of the first transistor; And it may include a second transistor connected to the control terminal of the first transistor.

The substrate includes a ground plate provided on the second surface, and the ground plate may be electrically connected to the plurality of holes.

Each of the plurality of light sources may include a light emitting diode provided on a substrate using a chip on board (COB) method and an optical dome having an arcuate or semicircular cross section.

The intensity of a first light beam emitted from the light emitting diode in a first direction perpendicular to the substrate may be less than the intensity of a second light beam emitted from the light emitting diode in a second direction different from the first direction.

A light source device according to one aspect of the disclosed outbreak includes a plurality of light sources that emit light; and a substrate including a plurality of dimming blocks arranged in rows and columns. Each of the plurality of dimming blocks may include at least four light sources connected in series among the plurality of light sources. At least four light sources included in one dimming block may be arranged on the first side of the substrate in rows and columns. The substrate may be provided with a plurality of holes penetrating the substrate. Each of the plurality of holes may electrically connect the first side of the substrate and the second side of the substrate. Each of the plurality of holes may be provided in an area surrounded by at least four light sources included in one dimming block.

According to one aspect of the disclosed invention, a display device and a light source device can be provided in which a hole for fixing a substrate to an SMT device is formed in a position where interference with an electrically conductive line formed on the substrate is minimized.

According to one aspect of the disclosed invention, a display device and a light source device that electrically connect the first side and the second side of the substrate using a hole for fixing the substrate to the SMT device can be provided.

Figure 1 shows an example of the appearance of a display device according to an embodiment.
Figure 2 shows an example of the structure of a display device according to an embodiment.
Figure 3 shows an example of a liquid crystal panel included in a display device according to an embodiment.
Figure 4 shows an example of a light source device included in a display device according to an embodiment.
Figure 5 shows an example of a light source included in a light source device according to an embodiment.
Figure 6 shows an example of the configuration of a display device according to an embodiment.
FIG. 7 shows an example of a dimming block of a light source device included in a display device according to an embodiment.
FIG. 8 illustrates an example in which a display device converts dimming data from image data according to an embodiment.
Figure 9 shows an example of a dimming driver and a light source device included in a display device according to an embodiment.
Figure 10 shows an example of a driving element included in a display device according to an embodiment.
Figure 11 shows an example of a dimming driver and a light source device included in a display device according to an embodiment.
Figure 12 shows an example of a driving element included in a display device according to an embodiment.
Figure 13 shows an example of a dimming driver and a light source device included in a display device according to an embodiment.
Figure 14 shows an example of a driving element included in a display device according to an embodiment.
Figure 15 shows an example of a dimming driver and a light source device included in a display device according to an embodiment.
Figure 16 shows an example of a dimming driver and a light source device included in a display device according to an embodiment.
Figure 17 shows an example of the first side of a substrate included in a display device according to an embodiment.
Figure 18 shows a portion of the substrate shown in Figure 17.
Figure 19 shows an example of a second side of a substrate included in a display device according to an embodiment.
FIG. 20 shows a cross section in the direction A-A' shown in FIG. 17.
Figure 21 shows an example of the first side of a substrate included in a display device according to an embodiment.
Figure 22 shows a portion of the substrate shown in Figure 21.

Like reference numerals refer to like elements throughout the specification. This specification does not describe all elements of the embodiments, and general content or overlapping content between the embodiments in the technical field to which the present invention pertains is omitted. The term 'unit, module, member, block' used in the specification may be implemented as software or hardware, and depending on the embodiment, a plurality of 'unit, module, member, block' may be implemented as a single component, or It is also possible for one 'part, module, member, or block' to include multiple components.

Throughout the specification, when a part is said to be “connected” to another part, this includes not only direct connection but also indirect connection, and indirect connection includes connection through a wireless communication network. do.

Additionally, when a part "includes" a certain component, this means that it may further include other components rather than excluding other components, unless specifically stated to the contrary.

Throughout the specification, when a member is said to be located “on” another member, this includes not only cases where a member is in contact with another member, but also cases where another member exists between the two members.

Terms such as first and second are used to distinguish one component from another component, and the components are not limited by the above-mentioned terms.

Singular expressions include plural expressions unless the context clearly makes an exception.

The identification code for each step is used for convenience of explanation. The identification code does not explain the order of each step, and each step may be performed differently from the specified order unless a specific order is clearly stated in the context. there is.

Hereinafter, the operating principle and embodiments of the present invention will be described with reference to the attached drawings.

Figure 1 shows an example of the appearance of a display device according to an embodiment.

The display device 10 is a device that processes image signals received from the outside and visually displays the processed images. Below, the case where the display device 10 is a television (TV) is exemplified, but is not limited thereto. For example, the display device 10 can be implemented in various forms such as a monitor, a portable multimedia device, and a portable communication device, and the form of the display device 10 is not limited as long as it is a device that visually displays images. .

In addition, the display device 10 may be a large format display (LFD) installed outdoors, such as on the roof of a building or at a bus stop. Here, the outdoors is not necessarily limited to the outdoors, and the display device 10 according to an embodiment can be installed in any place where many people can come and go even indoors, such as a subway station, shopping mall, movie theater, company, or store.

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

As shown in FIG. 1, the display device 10 may include a main body 11 and a screen 12 that displays an image I.

The main body 11 forms the exterior of the display device 10, and parts for the display device 10 to display an image I or perform various functions may be provided inside the main body 11. The main body 11 shown in FIG. 1 has a flat plate shape, but the shape of the main body 11 is not limited to that shown in FIG. 1. For example, the main body 11 may have a curved plate shape.

The screen 12 is formed on the front of the main body 11 and can display an image (I). For example, screen 12 can display still images or moving images. Additionally, the screen 12 can display a two-dimensional flat image or a three-dimensional stereoscopic image using the parallax between the user's two eyes.

The screen 12 includes, for example, a self-luminous panel (e.g., a light-emitting diode panel or an organic light-emitting diode panel) capable of directly emitting light, or emits light emitted by a light source device (e.g., a backlight unit), etc. It may include a non-emissive panel (eg, a liquid crystal panel) that can pass or block light.

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

Each of the plurality of pixels P may emit light of various brightnesses and colors. In order to emit light of various colors, each of the plurality of pixels P may include subpixels P _R , P _G , and P _B .

The subpixels (P _R , P _G , P _B ) include a red subpixel (P R ) capable of emitting red light, a green subpixel (P _G ) capable of emitting green light, and a green subpixel (P _G ) capable of emitting blue light. It may include a blue subpixel (P _B ). For example, red light can represent light with a wavelength of approximately 620 nm (nanometer, one billionth of a meter) to 750 nm. Green light can represent light with a wavelength ranging from approximately 495 nm to 570 nm. Blue light can represent light with a wavelength ranging from approximately 450 nm to 495 nm.

By combining the red light of the red subpixel (PR), the green light of the green subpixel (PG), and the blue light of the blue subpixel (PB), light of various brightnesses and colors is emitted from each of the plurality of pixels (P). can do.

Figure 2 shows an example of the structure of a display device according to an embodiment. Figure 3 shows an example of a liquid crystal panel included in a display device according to an embodiment.

As shown in FIG. 2, various component parts for generating an image (I) on the screen (S) may be provided inside the main body (11).

For example, the main body 11 includes a light source device 100 that is a surface light source, a liquid crystal panel 20 that blocks or passes light emitted from the light source device 100, and a light source device 100. And a control assembly 50 that controls the operation of the liquid crystal panel 20 and a power assembly 60 that supplies power to the light source device 100 and the liquid crystal panel 20 are provided. In addition, the main body 11 includes a bezel 13, a frame middle mold 14, and a bottom chassis 15 to support the liquid crystal panel 20, the light source device 100, the control assembly 50, and the power assembly 60. It may include a rear cover (16).

The light source device 100 may include a point light source that emits monochromatic light or white light. Additionally, the light source device 100 may refract, reflect, and scatter light to convert light emitted from a point light source into uniform surface light. In this way, the light source device 100 can emit uniform surface light toward the front by refracting, reflecting, and scattering light emitted from a point light source.

The light source device 100 is described in more detail below.

The liquid crystal panel 20 is provided in front of the light source device 100 and blocks or passes light emitted from the light source device 100 to form an image I.

The front surface of the liquid crystal panel 20 forms the screen S of the display device 10 described above, and the liquid crystal panel 20 may form a plurality of pixels P. The plurality of pixels P of the liquid crystal panel 20 can each independently block or pass light from the light source device 100. Additionally, light passing through the plurality of pixels (P) may form an image (I) displayed on the screen (S).

For example, as shown in FIG. 3, the liquid crystal panel 20 includes a first polarizing film 21, a first transparent substrate 22, a pixel electrode 23, a thin film transistor 24, and a liquid crystal layer 25. , it may include a common electrode 26, a color filter 27, a second transparent substrate 28, and a second polarizing film 29.

The first transparent substrate 22 and the second transparent substrate 28 can fix and support the pixel electrode 23, thin film transistor 24, liquid crystal layer 25, common electrode 26, and color filter 27. there is. These first and second transparent substrates 22 and 28 may be made of tempered glass or transparent resin.

The first polarizing film 21 and the second polarizing film 29 are provided outside the first and second transparent substrates 22 and 28. The first polarizing film 21 and the second polarizing film 29 can respectively pass certain polarized light and block (reflect or absorb) other polarized light. For example, the first polarizing film 21 may pass polarized light in the first direction and block (reflect or absorb) other polarized light. Additionally, the second polarizing film 29 may pass polarized light in the second direction and block (reflect or absorb) other polarized light. At this time, the first direction and the second direction may be perpendicular to each other. Therefore, polarized light that has passed through the first polarizing film 21 cannot pass through the second polarizing film 29.

The color filter 27 may be provided inside the second transparent substrate 28. The color filter 27 may include, for example, a red filter 27R that passes red light, a green filter 27G that passes green light, and a blue filter 27G that passes blue light. Additionally, the red filter 27R, green filter 27G, and blue filter 27B may be arranged in parallel with each other. The area occupied by the color filter 27 corresponds to the pixel P described above. The area occupied by the red filter 27R corresponds to the red subpixel P _R , the area occupied by the green filter 27G corresponds to the green subpixel P G, and the area occupied by the blue filter 27B corresponds to the green subpixel P _G. The area corresponds to the blue subpixel (P _B ).

The pixel electrode 23 may be provided inside the first transparent substrate 22, and the common electrode 26 may be provided inside the second transparent substrate 28. The pixel electrode 23 and the common electrode 26 are made of a metal material that conducts electricity, and can generate an electric field to change the arrangement of the liquid crystal molecules 115a constituting the liquid crystal layer 25, which will be described below. there is.

A thin film transistor (TFT) 24 is provided inside the second transparent substrate 22. The thin film transistor 24 can pass or block the current flowing through the pixel electrode 23. For example, an electric field may be created or removed between the pixel electrode 23 and the common electrode 26 depending on whether the thin film transistor 24 is turned on (closed) or turned off (open).

The liquid crystal layer 25 is formed between the pixel electrode 23 and the common electrode 26 and is filled with liquid crystal molecules 25a. Liquid crystals can represent an intermediate state between a solid (crystal) and a liquid. Liquid crystals can exhibit optical properties depending on changes in the electric field. For example, in liquid crystals, the direction of the molecular arrangement that makes up the liquid crystal may change depending on changes in the electric field. Therefore, the optical properties of the liquid crystal layer 25 may vary depending on the presence or absence of an electric field passing through the liquid crystal layer 25.

On one side of the liquid crystal panel 20, there is a cable 20a that transmits image data to the liquid crystal panel 20, and a display driver integrated circuit (DDI) that processes digital image data and outputs an analog image signal. (30) (hereinafter referred to as ‘panel driver’) is provided.

The cable 20a may electrically connect the control assembly 50/power assembly 60 and the panel driver 30, and may also electrically connect the panel driver 30 and the liquid crystal panel 20. The cable 20a may include a flexible flat cable or a film cable that can be bent.

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

Additionally, the cable 20a and the panel driver 30 may be integrated into a film cable, chip on film (COF), tape carrier package (TCP), etc. In other words, the panel driver 30 may be placed on the cable 20b. However, the present invention is not limited to this and the panel driver 30 may be disposed on the liquid crystal panel 20 .

The control assembly 50 may include a control circuit that controls the operation of the liquid crystal panel 20 and the light source device 100. For example, the control circuit may process video signals and/or audio signals received from an external content source. The control circuit can transmit image data to the liquid crystal panel 20 and transmit dimming data to the light source device 100.

The power assembly 60 may include a power circuit that supplies power to the liquid crystal panel 20 and the light source device 100. The power circuit may supply power to the light source device 100 so that the light source device 100 outputs surface light. The power circuit may supply power to the liquid crystal panel 20 so that the liquid crystal panel 20 blocks or passes light from the light source device 100.

The control assembly 50 and the power assembly 60 may be implemented with a printed circuit board and various circuits mounted on the printed circuit board. For example, the power circuit may include a condenser, coil, resistor element, processor, etc., and a power circuit board on which they are mounted. Additionally, the control circuit may include a memory, a processor, and a control circuit board on which they are mounted.

Figure 4 shows an example of a light source device included in a display device according to an embodiment. Figure 5 shows an example of a light source included in a light source device according to an embodiment.

As shown in FIG. 4, the light source device 100 includes a light source module 110 that generates light, a reflective sheet 120 that reflects light, and a diffuser plate 130 that uniformly diffuses the light. , may include an optical sheet 140 that improves the brightness of emitted light.

The light source module 110 may include a plurality of light sources 111 that emit light, and a substrate 112 that supports/fixes the plurality of light sources 111.

The plurality of light sources 111 may be arranged in a predetermined pattern so that light is emitted with uniform luminance. The plurality of light sources 111 may be arranged so that the distance between one light source and adjacent light sources is the same.

For example, as shown in FIG. 4, the plurality of light sources 111 may be arranged in rows and columns. Thereby, a plurality of light sources can be arranged so that an approximately square is formed by four adjacent light sources. Additionally, one light source is disposed adjacent to four light sources, and the distance between one light source and the four light sources adjacent to it may be approximately the same.

A plurality of light sources may be arranged so that an approximately equilateral triangle is formed by three adjacent light sources. At this time, one light source may be placed adjacent to six light sources. Additionally, the distance between one light source and six light sources adjacent to it may be approximately the same.

However, the arrangement of the plurality of light sources 111 is not limited to the arrangement described above, and the plurality of light sources 111 may be arranged in various ways so that light is emitted with uniform luminance.

When power is supplied, the light source 111 emits monochromatic light (light with a specific range of wavelengths or light with one peak wavelength, for example, blue light) or white light (light with multiple peak wavelengths, for example, red light). , a mixture of green light and blue light) can be employed in various directions.

Each of the plurality of light sources 111 may include a light emitting diode (LED) 190 and an optical dome 180.

The thickness of the optical device 100 may also become thinner so that the thickness of the display device 1 becomes thinner. To reduce the thickness of the optical device 100, each of the plurality of light sources 111 becomes thinner and its structure is simplified.

The light emitting diode 190 may be directly attached to the substrate 112 using a chip on board (COB) method. For example, the light source 111 may include a light emitting diode 190 in which a light emitting diode chip or light emitting diode die is directly attached to the substrate 112 without separate packaging.

The light emitting diode 190 may be manufactured as a flip chip type. The flip chip type light emitting diode 190 does not use an intermediate medium such as a metal lead (wire) or ball grid array (BGA) when attaching the light emitting diode, which is a semiconductor device, to the substrate 112. The electrode pattern of the semiconductor device can be fused to the substrate 112 as is. In this way, by omitting the metal lead (wire) or ball grid array, it is possible to miniaturize the light source 111 including the flip chip type light emitting diode 190.

In this paper, a flip-chip type light emitting diode 190 that is directly fused to the substrate 112 in a chip-on-board manner has been described, but the light source 111 is not limited to a flip chip type light emitting diode. For example, the light source 111 may include a package type light emitting diode.

The optical dome 180 may cover the light emitting diode 190. The optical dome 180 can prevent or suppress damage to the light emitting diode 190 due to external mechanical action and/or damage to the light emitting diode 190 due to chemical action.

For example, the optical dome 180 may have a dome shape obtained by cutting a sphere into a plane not including its center, or a hemisphere shape obtained by cutting a sphere into a plane including its center. The vertical cross-section of the optical dome 180 may be arcuate or semicircular, for example.

The optical dome 180 may be made of silicone or epoxy resin. For example, molten silicon or epoxy resin is discharged onto the light emitting diode 190 through a nozzle, etc., and then the discharged silicon or epoxy resin is cured, thereby forming the optical dome 180.

Accordingly, the optical dome 180 may have various shapes depending on the viscosity of the liquid silicone or epoxy resin. For example, if the optical dome 180 is manufactured using silicon with a thixotropic index of approximately 2.7 to 3.3 (preferably 3.0), the ratio of the height of the dome to the diameter of the bottom of the dome (of the dome) The optical dome 180 may be formed with a dome ratio (height/base diameter) of approximately 0.25 to 0.31 (preferably 0.28).

Optical dome 180 may be optically transparent or translucent. Light emitted from the light emitting diode 190 may pass through the optical dome 180 and be emitted to the outside.

At this time, the dome-shaped optical dome 180 can refract light like a lens. For example, light emitted from the light emitting diode 190 may be dispersed by being refracted by the optical dome 180.

In this way, the optical dome 180 not only protects the light emitting diode 190 from external mechanical and/or chemical or electrical actions, but also disperses light emitted from the light emitting diode 190.

In the above, the optical dome 180 in the form of a silicon dome has been described, but the light source 111 is not limited to including the optical dome 180. For example, the light source 111 may include a lens to disperse light emitted from the light emitting diode.

The substrate 112 may fix the plurality of light sources 111 so that the positions of the light sources 111 do not change. Additionally, the substrate 112 may supply power to each light source 111 for the light source 111 to emit light.

The substrate 112 may fix a plurality of light sources 111 . The substrate 112 may be made of synthetic resin or tempered glass or a printed circuit board (PCB) on which a conductive power supply line is formed to supply power to the light source 111.

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

A plurality of through holes 120a are formed in the reflective sheet 120 at positions corresponding to each of the plurality of light sources 111 of the light source module 110. Additionally, the light source 111 of the light source module 110 may pass through the through hole 120a and protrude in front of the reflective sheet 120. Accordingly, the plurality of light sources 111 may emit light in 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 provided in front of the light source module 110 and the reflective sheet 120. The diffusion plate 130 can evenly disperse the light emitted from the light source 111 of the light source module 110.

As described above, the plurality of light sources 111 are disposed at equal intervals on the rear of the light source device 100. As a result, unevenness in luminance may occur depending on the positions of 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 order to eliminate uneven luminance due to the plurality of light sources 111 . In other words, the diffusion plate 130 can uniformly emit uneven light from the plurality of light sources 111 to the entire surface.

The optical sheet 140 may include various sheets to improve luminance and uniformity of luminance. For example, the optical sheet 140 may include a light conversion sheet 141, a diffusion sheet 142, a prism sheet 143, a reflective polarizing sheet 144, etc.

The optical sheet 140 is not limited to the sheet or film shown in FIG. 4 and may include more various sheets or films, such as a protective sheet.

Figure 6 shows an example of the configuration of a display device according to an embodiment. FIG. 7 shows an example of a dimming block of a light source device included in a display device according to an embodiment. FIG. 8 illustrates an example in which a display device converts dimming data from image data according to an embodiment.

As shown in FIG. 6, 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 source. It may include device 100.

The content receiving unit 80 may include a receiving terminal 81 and a tuner 82 that receive content including video signals and/or audio signals from content sources.

The receiving terminal 81 can receive video signals and audio signals from content sources through a cable. For example, the receiving terminal 81 is a component (YPbPr/RGB) terminal, a composite (composite video blanking and sync, CVBS) terminal, an audio terminal, a High Definition Multimedia Interface (HDMI) terminal, and a universal serial terminal. It may include a bus (Universal Serial Bus, USB) terminal, etc.

The tuner 82 may receive a broadcast signal from a broadcast reception antenna or a wired cable. Additionally, the tuner 82 can extract a broadcast signal of a channel selected by the user from broadcast signals. For example, the tuner 82 may pass a broadcast signal having a frequency corresponding to a channel selected by the user among a plurality of broadcast signals received through a broadcast reception antenna or a wired cable and block broadcast signals having a different frequency. there is.

In this way, the content receiver 80 can receive video signals and audio signals from content sources through the reception terminal 81 and/or the tuner 82. The content receiver 80 may output video signals and/or audio signals received through the reception terminal 81 and/or the tuner 82 to the image processor 90.

The image processing unit 90 may include a processor 91 that processes image data, and a memory 92 that stores/stores programs and data for processing image data.

Memory 92 may store programs and data for processing video signals and/or audio signals. Additionally, the memory 92 may temporarily store data issued while processing video signals and/or audio signals.

The memory 92 includes non-volatile memory such as ROM (Read Only Memory) and flash memory, and volatile memory such as S-RAM (Static Random Access Memory, S-RAM) and D-RAM (Dynamic Random Access Memory). It can be included.

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

In this way, the image processing unit 90 can generate image data and dimming data from the video signal acquired by the content receiving unit 80. Additionally, the image processing unit 90 may transmit image data and dimming data to the liquid crystal panel 20 and the light source device 100, respectively.

Image data may include information about the intensity of light transmitted by each of a plurality of pixels (or a plurality of subpixels) included in the liquid crystal panel 20. Image data may be provided to the liquid crystal panel 20 through the panel driver 30.

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

The panel driver 30 may receive image data from the image processor 90. The panel driver 30 can drive the liquid crystal panel 20 according to image data. In other words, the panel driver 30 can convert image data, which is a digital signal (hereinafter referred to as 'digital image data'), into an analog image signal, which is an analog voltage signal. The panel driver 30 may provide the converted analog image signal to the liquid crystal panel 20. The optical properties (eg, light transmittance) of a plurality of pixels included in the liquid crystal panel 20 may change depending on the analog image signal.

The panel driver 30 may include, for example, a timing controller, a data driver, a scan driver, etc.

The timing controller may receive image data from the image processing unit 90. The timing controller can output image data and drive control signals to the data driver and scan driver. The drive control signal may include a scan control signal and a data control signal. The scan control signal and data control signal can be used to control the operation of the scan driver and the data driver, respectively.

The scan driver may receive a scan control signal from the timing controller. The scan driver may activate the input of any one row among the plurality of rows in the liquid crystal panel 20 according to the scan control signal. In other words, the scan driver can convert pixels included in one row among a plurality of pixels arranged in a plurality of rows and a plurality of columns into a state capable of receiving an analog image signal. At this time, pixels other than pixels whose input is activated by the scan driver may not receive the analog image signal.

The data driver can receive image data and data control signals from the timing controller. The data driver can output image data to the liquid crystal panel 20 according to the data control signal. For example, a data driver can receive digital image data from a timing controller. The data driver can convert digital image data into analog image signals. Additionally, the data driver can provide an analog image signal to pixels included in any one row input-activated by the scan driver. At this time, pixels whose input is activated by the scan driver can receive analog image signals. The optical properties (eg, light transmittance) of input-activated pixels change according to the received analog image signal.

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

Additionally, the dimming data may include information about the intensity of light emitted by each of the plurality of light sources (or plurality of dimming blocks) included in the light source device 100. Dimming data may be provided to the light source device 100 through the dimming driver 170.

The light source device 100 may include a plurality of light sources 111 that emit light. 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 multiple rows and multiple columns.

The light source device 100 may be divided into a plurality of dimming blocks 200. Additionally, each of the plurality of dimming blocks 200 may include at least one light source.

The light source device 100 may output surface light by diffusing light emitted from the plurality of light sources 111 . The liquid crystal panel 20 includes a plurality of pixels, and each of the plurality of pixels can be controlled to pass light or block light. An image may be formed by light passing through each of a plurality of pixels.

At this time, the light source device 100 may turn off a plurality of light sources corresponding to the dark part of the image in order to make the dark part of the image darker. Thereby, the dark part of the image becomes darker, and the contrast ratio of the image can be improved.

In this way, the light source device 100 controls the plurality of light sources to emit light in the area corresponding to the bright part of the image and controls the plurality of light sources to not emit light in the area corresponding to the dark part of the image. Hereinafter referred to as “local dimming.”

For local dimming, the plurality of light sources 111 included in the light source device 100 may be divided into a plurality of dimming blocks 200 as shown in FIG. 7. In FIG. 7, a total of 80 dimming blocks in 8 rows and 10 columns are shown, but the number and arrangement of dimming blocks are not limited to those shown in FIG. 7.

Each of the plurality of dimming blocks 200 may include at least one light source 111. The light source device 100 may supply the same driving current to light sources belonging to the same dimming block, and the light sources belonging to the same dimming block may emit light of the same brightness. For example, light sources belonging to the same dimming block are connected to each other in series, so that the same driving current can be supplied to the light sources belonging to the same dimming block.

Additionally, the light source device 100 may further include driving circuits that control driving current supplied to light sources included in each of the plurality of dimming blocks 200. Driving circuits may be provided to correspond to each dimming block 200. In other words, the driving circuits can each drive the dimming blocks 200.

In this way, since the light sources included in the dimming block are connected to each other in series, the light sources included in the dimming block operate as one unit and can form a light source block as one unit.

Therefore, hereinafter, “supplying a driving current to the dimming block” may be interpreted as having the same meaning as “supplying a driving current to the light sources included in the dimming block.”

In FIG. 7 , dimming blocks each including nine light sources are shown, but the number and arrangement of light sources included in each dimming block are not limited to those shown in FIG. 7 .

As described above, the image processor 90 may provide dimming data for local dimming to the light source device 100. Dimming data may include information about the luminance of each of the plurality of dimming blocks 200. For example, the dimming data may include information about the intensity of light output from light sources included in each of the plurality of dimming blocks 200.

The image processing unit 90 may obtain dimming data from image data.

The image processing unit 90 can convert image data into dimming data in various ways. For example, as shown in FIG. 8, the image processing unit 90 may divide an image I of image data into a plurality of image blocks IB. The number of image blocks IB is equal to the number of dimming blocks 200, and each of the image blocks IB may correspond to a plurality of dimming blocks 200.

The image processor 90 may obtain the luminance value L of the plurality of dimming blocks 200 from the image data of the plurality of image blocks IB. Additionally, the image processor 90 may generate dimming data by combining the luminance values (L) of the plurality of dimming blocks 200.

For example, the image processor 90 may obtain the luminance value (L) of each of the plurality of dimming blocks 200 based on the maximum value among the luminance values of pixels included in each of the image blocks (IB). .

One image block includes a plurality of pixels, and image data of one image block may include image data of a plurality of pixels (eg, red data, green data, blue data, etc.). The image processor 90 may calculate the luminance value of each pixel based on the image data of each pixel.

The image processor 90 may set the maximum value among the luminance values of each pixel included in the image block as the luminance value of the dimming block corresponding to the image block. For example, the image processor 90 may set the maximum value among the luminance values of pixels included in the ith image block (IB(i)) as the luminance value (L(i)) of the ith dimming block, and The maximum value among the luminance values of pixels included in the j image block (IB(j)) can be set as the luminance value (L(j)) of the j-th dimming block.

The image processor 90 may generate dimming data by combining the luminance values of the plurality of dimming blocks 200.

The dimming driver 170 may receive dimming data from the image processor 90. The dimming driver 170 may drive the light source device 100 according to dimming data. Here, the dimming data may include information about the brightness of each of the plurality of dimming blocks 200 or information about the brightness of light sources included in each of the plurality of dimming blocks 200.

The dimming driver 170 can convert dimming data, which is a digital voltage signal, into analog driving current.

The dimming driver 170 may sequentially provide an analog dimming signal to the driving circuits corresponding to each of the dimming blocks 200 in an active matrix method, for example.

The plurality of dimming blocks 200 may be divided into a plurality of groups. Driving current may be supplied simultaneously to dimming blocks belonging to the same group, and driving current may be supplied sequentially at different times to dimming blocks belonging to different groups. The dimming driver 170 may activate dimming blocks belonging to one of a plurality of groups and provide an analog dimming signal to the activated dimming blocks. Thereafter, the dimming driver 170 may activate dimming blocks belonging to different groups and provide an analog dimming signal to the activated dimming blocks.

For example, dimming blocks located in the same row may belong to the same group, and dimming blocks located in different rows may belong to different groups. The dimming driver 170 may activate dimming blocks belonging to one row and provide an analog dimming signal to the activated dimming blocks. Thereafter, the dimming driver 170 may activate inputs of dimming blocks belonging to another row and provide an analog dimming signal to the dimming blocks whose inputs are activated.

The driving circuit of each of the dimming blocks 200 may provide an analog driving current corresponding to an analog dimming signal to the light source module 110. The light sources 111 included in the light source module 110 may emit light by the analog driving current. According to dimming data, light sources belonging to the same dimming block may emit light of the same intensity. Additionally, according to dimming data, light sources belonging to different dimming blocks may emit light of different intensities.

How the dimming driver 170 sequentially provides analog dimming signals to the plurality of dimming blocks 200 in an active matrix manner will be described in more detail below.

Figure 9 shows an example of a dimming driver and a light source device included in a display device according to an embodiment. Figure 10 shows an example of a driving element included in a display device according to an embodiment.

9 and 10, the display device 10 includes a dimming driver 170, a plurality of driving elements 300 (310, 320, 330, 340, 350, 360, 370, 380, 390), and a plurality of Includes light sources 111.

The plurality of light sources each include a light emitting diode, and may be divided into a plurality of dimming blocks 200 (210, 220, 230, 240, 250, 260, 270, 280, 290). For example, light sources belonging to the same dimming block may be connected to each other in series and supplied with the same driving current.

The plurality of driving elements 300 may receive an analog dimming signal from the dimming driver 170 and supply 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 one dimming block can receive current from the same driving element. For example, a plurality of light sources belonging to the first dimming block 210 may receive driving current from the first driving element 310. A plurality of light sources belonging to the second dimming block 220 may receive driving current from the second driving element 320. A plurality of light sources belonging to the third dimming block 230 may receive driving current from the third driving element 330. In the same way, a plurality of light sources belonging to each of the n-th dimming blocks (240, 250, 260, 270, 280, 290) supply driving current from the n-th driving elements (340, 350, 360, 370, 380, 390). You can receive it.

The driving elements 300 may receive an analog dimming signal from the dimming driver 170 while the input is activated by the dimming driver 170 and store the received analog dimming signal. Additionally, while the input is deactivated, the plurality of driving elements 300 may supply driving current corresponding to a pre-stored analog dimming signal to the plurality of light sources.

A plurality of scan lines (S1, S2, S3) for providing scan signals from the dimming driver 170 to the plurality of driving elements 300 and analog dimming from the dimming driver 170 to the plurality of driving elements 300. A plurality of data lines D1, D2, and D3 may be provided to provide signals.

The plurality of dimming blocks 200 may be arranged in multiple rows and multiple columns. Driving elements corresponding to dimming blocks belonging to the same row may share the same scan line. For example, the first driving element 310, the second driving element 320, and the third driving element 330 may share the first scan line S1, and the fourth driving element 340 and the third driving element 330 may share the first scan line S1. The fifth driving element 350 and the sixth driving element 360 may share the second scan line S2. Additionally, the seventh driving element 370, the eighth driving element 380, and the ninth driving element 390 may share the third scan line S3.

Additionally, driving elements corresponding to dimming blocks belonging to the same column may share the same data line. For example, the first driving element 310, the fourth driving element 340, and the seventh driving element 370 may share the first data line D1, and the second driving element 320 and the seventh driving element 370 may share the first data line D1. The fifth driving element 350 and the eighth driving element 380 may share the second data line D2. Additionally, the third driving element 330, the sixth driving element 360, and the ninth driving element 390 may share the third data line D3.

The inputs of the plurality of driving elements 300 are activated by the scan signal of the dimming driver 170, and the driving elements whose inputs are activated may receive an analog dimming signal from the dimming driver 170.

For example, while the dimming driver 170 outputs a scan signal through the first scan line S1, the first driving element 310, the second driving element 320, and the third driving element 330 An analog dimming signal can be received through the first data line (D1), the second data line (D2), and the third data line (D3), respectively. On the other hand, other driving elements 340, 350, 360, 370, 380, and 390 do not receive the analog dimming signal.

In addition, while the dimming driver 170 outputs a scan signal through the second scan line S2, the fourth driving element 340, the fifth driving element 350, and the sixth driving element 360 are respectively An analog dimming signal can be received through the first data line (D1), the second data line (D2), and the third data line (D3). On the other hand, other driving elements 310, 320, 330, 370, 380, and 390 do not receive the analog dimming signal.

When each of the plurality of driving elements 300 receives an analog dimming signal, it may store the received analog dimming signal and supply driving current to a plurality of light sources according to the stored analog dimming signal.

For example, while the dimming driver 170 outputs a scan signal through the first scan line S1, the fourth driving element 340, the fifth driving element 350, and the sixth driving element 360 Each may supply driving current to a plurality of light sources included in each of the fourth dimming block 240, the fifth dimming block 250, and the sixth dimming block 260.

In addition, while the dimming driver 170 outputs a scan signal through the second scan line S2, each of the first driving element 310, the second driving element 320, and the third driving element 330 Driving current may be supplied to a plurality of light sources included in each of the first dimming block 210, the second dimming block 220, and the third dimming block 330.

By driving in this active matrix method, the plurality of driving elements 300 can sequentially receive an analog dimming signal from the dimming driver 170, and an input that does not receive an analog dimming signal from the dimming driver 170 Even while it is inactive, driving current can be supplied to a plurality of light sources.

In addition, by driving in the active matrix method, the number of pins of the dimming driver 170 for providing analog dimming signals to the plurality of dimming blocks 200 is reduced. Additionally, the number of signal lines for providing analog dimming signals from the dimming driver 170 to the plurality of dimming blocks 200 is reduced. Thereby, the number of dimming blocks can be increased without limiting the number of pins of the dimming driver 170.

The plurality of driving elements 300 may include circuits of various topologies to implement active matrix driving.

For example, as shown in FIG. 10, each of the plurality of driving elements 300 may include a circuit of a 1C2T (one capacitor two transistor) topology.

Each of the plurality of driving elements 300 may include a driving circuit 301 including a driving transistor (Tdr), a switching transistor (Tsw), and a storage capacitor (Cst).

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 source (Vdd), and the output terminal may be connected to a plurality of light sources. The driving transistor Tdr can supply driving current to a plurality of light sources according to the voltage of the control terminal.

The storage capacitor (Cst) is provided between the driving transistor (Tdr), the output terminal, and the control terminal. The storage capacitor (Cst) can output a constant voltage by storing the input charge. The driving transistor Tdr may supply driving current to a plurality of light sources according to the voltage output by the storage capacitor Cst.

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

The switching transistor (Tsw) is turned on by the scan signal of the scan line (S1, S2, S3), and transmits the analog dimming signal of the data line (D1, D2, D3) to the storage capacitor (Cst) and the driving transistor (Tdr). You can. The analog dimming signals of the data lines D1, D2, and D3 are input to the control terminal of the driving transistor Tdr, and the driving transistor Tdr can supply a driving current corresponding to the analog dimming signal to a plurality of light sources. The storage capacitor Cst may store charge from the analog dimming signal and output a voltage corresponding to the analog dimming signal.

Afterwards, even if the input of the scan signal is stopped and the switching transistor (Tsw) is turned off, the storage capacitor (Cst) still outputs a voltage corresponding to the analog dimming signal, and the driving transistor (Tdr) still outputs a voltage corresponding to the analog dimming signal. Driving current can be supplied to a plurality of light sources.

The driving circuit shown in FIG. 10 is only an example of the driving element 300, and is not limited thereto. For example, the driving element 300 may include a 3T1C topology circuit with an added transistor to correct the body effect of the driving transistor Tdr.

For example, the driving element 300 may be provided as a single chip on which the circuit shown in FIG. 10 is integrated. In other words, the circuit shown in FIG. 10 can be integrated into one semiconductor chip.

In this way, each of the driving elements 300 can supply driving current to light sources included in one dimming block. In this case, each of the driving elements 300 may receive a scan signal through one scan line and an analog dimming signal through one data line.

Figure 11 shows an example of a dimming driver and a light source device included in a display device according to an embodiment. Figure 12 shows an example of a driving element included in a display device according to an embodiment.

Referring to FIGS. 11 and 12 , the display device 10 includes a dimming driver 170, a plurality of driving elements 400 (410, 420, 430), and a plurality of light sources 111.

The plurality of driving elements 400 may receive an analog dimming signal from the dimming driver 170 and supply driving current to the plurality of light sources 111 according to the received analog dimming signal.

The plurality of light sources 111 include light emitting diodes, and may be divided into a plurality of dimming blocks 200 (210, 220, 230, 240, 250, 260, 270, 280, 290). For example, light sources belonging to the same dimming block may be connected to each other in series and supplied with the same driving current.

As shown in FIG. 11, each of the driving elements 400 can supply driving current to light sources included in three dimming blocks located in the same row. For example, the first driving element 410 may supply driving current to a plurality of light sources belonging to the first dimming block 210, the second dimming block 220, and the third dimming block 230. The second driving element 420 may supply driving current to a plurality of light sources belonging to the fourth dimming block 240, the fifth dimming block 250, and the sixth dimming block 260. Additionally, the third driving element 430 may supply driving current to a plurality of light sources belonging to the seventh dimming block 270, the eighth dimming block 280, and the ninth dimming block 290.

The driving elements 400 may supply different driving currents to light sources belonging to different dimming blocks according to analog dimming signals. For example, the first driving element 410 supplies the first driving current to the light sources belonging to the first dimming block 210 according to the analog dimming signal, and to the second dimming block 220 according to the analog dimming signal. A second driving current may be supplied to the light sources belonging to the light sources, and a third driving current may be supplied to the light sources belonging to the third dimming block 230 according to the analog dimming signal.

The input of the driving elements 400 may be activated by a scan signal from the dimming driver 170. The driving elements 400 receive an analog dimming signal from the dimming driver 170 while the input is activated, store the received analog dimming signal, and supply a driving current corresponding to the received analog dimming signal to a plurality of light sources. can be supplied. Additionally, while the input is deactivated, the driving elements 400 may supply driving current corresponding to the stored analog dimming signal to a plurality of light sources.

For example, when the dimming driver 170 outputs a scan signal through the first scan line S1, the input of the first driving element 410 may be activated. The first driving element 410 may receive and store an analog dimming signal through the first data line (D1), the second data line (D2), and the third data line (D3). The first driving element 410 generates a driving current to the light sources of the first dimming block 210, the light sources of the second dimming block 220, and the third dimming block 230 according to the received analog dimming signal. can be supplied.

Thereafter, when the dimming driver 170 outputs a scan signal through the second scan line S2, the input of the second driving element 420 may be activated. The second driving element 420 may receive an analog dimming signal through the first data line (D1), the second data line (D2), and the third data line (D3). The second driving element 420 supplies a driving current to the light sources of the fourth dimming block 240, the light sources of the fifth dimming block 250, and the light sources of the sixth dimming block 260 according to the received analog dimming signal. can be supplied. At this time, the input of the first driving element 410 is deactivated, but the light sources of the first dimming block 210, the light sources of the second dimming block 220, and the third dimming block 230 are activated according to the stored analog dimming signal. Driving current can be supplied to light sources.

In this way, the first driving element 400 may receive analog dimming signals through the plurality of data lines D1, D2, and D3, and receive a scan signal through the scan line S1. The first driving element 400 may supply driving currents according to a plurality of analog dimming signals to the plurality of dimming blocks 210, 220, and 230 based on receiving the scan signal.

To implement such active matrix driving, the plurality of driving elements 400 may include driving circuits 401, 402, and 403 as shown in FIG. 12, for example. At this time, each of the driving circuits 401, 402, and 403 may correspond to each of the dimming blocks.

Each of the plurality of driving elements 400 includes a first driving circuit 401 for driving the dimming blocks 210, 240, and 270 in the first row and a first driving circuit 401 for driving the dimming blocks 220, 250, and 280 in the second row. It may include a second driving circuit 402 and a third driving circuit 403 for driving the dimming blocks 230, 260, and 290 in the third row.

Each of the driving circuits 401, 402, and 403 may include a driving transistor (Tdr), a switching transistor (Tsw), and a storage capacitor (Cst). The configuration of each of the driving circuits 401, 402, and 403 may be the same as the driving circuit 301 described with FIG. 10.

At this time, the first driving circuit 401, the second driving circuit 402, and the third driving circuit 403 may share one scan line. Additionally, each of the first driving circuit 401, the second driving circuit 402, and the third driving circuit 403 may receive analog dimming signals from different data lines.

The circuit shown in FIG. 12 is only an example of the driving element 400, and is not limited thereto.

In this way, each of the driving elements 400 can supply driving current to a plurality of dimming blocks arranged in the same row (or belonging to the same group). In this case, the driving elements 400 may simultaneously receive a scan signal through one scan line and a plurality of analog dimming signals through a plurality of data lines.

Figure 13 shows an example of a dimming driver and a light source device included in a display device according to an embodiment. Figure 14 shows an example of a driving element included in a display device according to an embodiment.

Referring to FIGS. 13 and 14 , the display device 10 includes a dimming driver 170, a plurality of driving elements 500 (510, 520, 530), and a plurality of light sources 111.

The plurality of light sources 111 include light emitting diodes, and may be divided into a plurality of dimming blocks 200 (210, 220, 230, 240, 250, 260, 270, 280, 290). For example, light sources belonging to the same dimming block may be connected to each other in series and supplied with the same driving current.

The plurality of driving elements 500 may receive an analog dimming signal from the dimming driver 170 and supply driving current to the plurality of light sources 111 according to the received analog dimming signal.

As shown in FIG. 13, each of the driving elements 500 can supply driving current to light sources included in three dimming blocks located in the same row. For example, the first driving element 510 may supply driving current to a plurality of light sources belonging to the first dimming block 210, the fourth dimming block 240, and the seventh dimming block 270. The second driving element 520 may supply driving current to a plurality of light sources belonging to the second dimming block 220, the fifth dimming block 250, and the eighth dimming block 280. Additionally, the third driving element 530 may supply driving current to a plurality of light sources belonging to the third dimming block 230, the sixth dimming block 260, and the ninth dimming block 290.

The driving elements 500 may supply different driving currents to light sources belonging to different dimming blocks according to analog dimming signals.

Each of the driving elements 500 may include driving circuits 501, 502, and 503 as shown in FIG. 14. Each of the driving circuits 501, 502, and 503 may correspond to each of the dimming blocks, and the input is activated by the scan signal of the dimming driver 170 and the analog dimming signal from the dimming driver 170 while the input is activated. can receive.

For example, when the dimming driver 170 outputs a scan signal through the first scan line S1, each of the first driving element 510, the second driving element 520, and the third driving element 530 1 The input of the driving circuit 501 may be activated. The first driving element 510 may receive an analog dimming signal through the first data line D1, and the second driving element 520 may receive an analog dimming signal through the second data line D2. , the third driving element 530 may receive an analog dimming signal through the third data line D3.

Thereafter, when the dimming driver 170 outputs a scan signal through the second scan line S2, each of the first driving element 510, the second driving element 520, and the third driving element 530 The input of the driving circuit 502 may be activated. The first driving element 510 may receive an analog dimming signal through the first data line D1, and the second driving element 520 may receive an analog dimming signal through the second data line D2. , the third driving element 530 may receive an analog dimming signal through the third data line D3.

In this way, each of the driving elements 400 may receive scan signals through a plurality of scan lines (S1, S2, and S3) and receive an analog dimming signal through the data line (D1, D2, or D3). Each of the driving elements 400 may sequentially supply driving currents to a plurality of dimming blocks based on sequentially receiving scan signals.

To implement such active matrix driving, the plurality of driving elements 500 may include a driving circuit as shown in FIG. 14, for example.

Each of the plurality of driving elements 500 includes a first driving circuit 501 for driving the dimming blocks 210, 220, and 230 in the first row and a first driving circuit 501 for driving the second rows 240, 250, and 260. It may include a second driving circuit 502 and a third driving circuit 503 for driving the third rows 270, 280, and 290.

Each of the first driving circuit 501, the second driving circuit 502, and the third driving circuit 503 may include a driving transistor (Tdr), a switching transistor (Tsw), and a storage capacitor (Cst). The configuration of each of the first driving circuit 501, the second driving circuit 502, and the third driving circuit 503 may be the same as the driving circuit (driving element) described with FIG. 10.

At this time, the first driving circuit 501, the second driving circuit 502, and the third driving circuit 503 may share one data line. Additionally, the input of the first driving circuit 501, the second driving circuit 502, and the third driving circuit 503 may be activated by a scan signal through different scan lines.

The circuit shown in FIG. 14 is only an example of the driving element 500, and is not limited thereto.

In this way, each of the driving elements 500 can supply driving current to a plurality of dimming blocks arranged in the same row. In this case, the driving elements 500 may receive scan signals through a plurality of scan lines and a plurality of analog dimming signals through one data line.

Additionally, each of the driving elements may supply driving current to light sources included in the plurality of dimming blocks 200.

The plurality of dimming blocks 200 may be arranged in a matrix form, and the plurality of dimming blocks 200 may be driven in an active matrix manner.

For example, each of the driving elements may supply driving current to each of the dimming blocks (more specifically, light sources included in the dimming blocks) in an active matrix manner.

As another example, each of the driving elements may supply driving current to a plurality of dimming blocks belonging to the same group (or the same row). In other words, the driving element may include driving circuits that supply driving current to a plurality of dimming blocks belonging to the same group.

At this time, each of the driving elements may receive a scan signal through one scan line and may receive a plurality of analog dimming signals through a plurality of data lines. Additionally, each of the driving elements may include one scan pin in contact with one scan line and a plurality of data pins each connected to a plurality of data lines.

As another example, each of the driving elements may supply driving current to a plurality of dimming blocks belonging to different groups (or different rows). In other words, the driving element may include driving circuits that supply driving current to a plurality of dimming blocks belonging to different groups.

At this time, each of the driving elements may sequentially receive a plurality of scan signals through a plurality of scan lines, and may sequentially receive a plurality of analog dimming signals through one data line. Additionally, each of the driving elements may include a plurality of scan pins in contact with a plurality of scan lines and one data pin each connected to one data line.

Figure 15 shows an example of a dimming driver and a light source device included in a display device according to an embodiment.

Referring to FIG. 15, the display device 10 includes a dimming driver 170, a plurality of driving elements 600 (610, 620), and a plurality of light sources 111.

The plurality of driving elements 600 may receive an analog dimming signal from the dimming driver 170 and supply driving current to the plurality of light sources 111 according to the received analog dimming signal.

The plurality of light sources 111 include light emitting diodes, and may be divided into a plurality of dimming blocks 200 (210, 220, 230, 240, 250, 260, 270, 280, 290). For example, light sources belonging to the same dimming block may be connected to each other in series and supplied with the same driving current.

As shown in FIG. 15, each of the driving elements 600 can supply driving current to light sources included in six dimming blocks located in two rows/three columns (2*3). For example, the first driving element 610 includes a first dimming block 210, a second dimming block 220, a third dimming block 230, a fourth dimming block 240, and a fifth dimming block 250. ) and the light sources belonging to the sixth dimming block 260 can be supplied with driving current.

Each of the driving elements 600 may include six driving circuits corresponding to six dimming blocks. For example, the first driving element 610 includes a first dimming block 210, a second dimming block 220, a third dimming block 230, a fourth dimming block 240, and a fifth dimming block 250. ) and a first driving circuit, a second driving circuit, a third driving circuit, a fourth driving circuit, a fifth driving circuit, and a sixth driving circuit corresponding to the sixth dimming block 260.

The driving circuits can each drive six dimming blocks. For example, when the dimming driver 170 outputs a scan signal through the first scan line S1, the input of the first driving circuit, the second driving circuit, and the third driving circuit included in the first driving element 610 This can be activated. The input-activated first driving circuit, second driving circuit, and third driving circuit may receive an analog dimming signal through the first data line (D1), the second data line (D2), and the third data line (D3). and a driving current can be supplied to the first dimming block 210, the second dimming block 220, and the third dimming block 230.

When the dimming driver 170 outputs a scan signal through the second scan line S2, the inputs of the fourth driving circuit, the fifth driving circuit, and the sixth driving circuit included in the first driving element 610 may be activated. there is. The input-activated fourth driving circuit, fifth driving circuit, and sixth driving circuit may receive an analog dimming signal through the first data line (D1), the second data line (D2), and the third data line (D3). and a driving current can be supplied to the fourth dimming block 240, the fifth dimming block 250, and the sixth dimming block 260.

In this way, each of the driving elements 600 may receive a scan signal through a plurality of scan lines (S1, S2) and an analog dimming signal through a plurality of data lines (D1, D2, D3).

The number of scan lines S1 and S2 connected to the driving elements 600 may correspond to the number of rows to which the dimming blocks 200 driven by the driving elements 600 belong. Additionally, the number of pins through which the driving element 600 receives the scan signal may correspond to the number of rows to which the dimming blocks 200 driven by the driving elements 600 belong.

The number of data lines D1, D2, and D3 connected to the driving elements 600 may correspond to the number of columns to which the dimming blocks 200 driven by the driving elements 600 belong. Additionally, the number of pins through which the driving element 600 receives the analog dimming signal may correspond to the number of columns to which the dimming blocks 200 driven by the driving elements 600 belong.

Referring to FIG. 16, the display device 10 includes a dimming driver 170, a plurality of driving elements 700 (710, 720), and a plurality of light sources 111.

The plurality of driving elements 700 may receive an analog dimming signal from the dimming driver 170 and supply driving current to the plurality of light sources 111 according to the received analog dimming signal.

The plurality of light sources 111 include light emitting diodes, and may be divided into a plurality of dimming blocks 200 (210, 220, 230, 240, 250, 260, 270, 280, 290). For example, light sources belonging to the same dimming block may be connected to each other in series and supplied with the same driving current.

As shown in FIG. 16, each of the driving elements 700 can supply driving current to light sources included in six dimming blocks located in three rows/two columns (3*2). For example, the first driving element 610 includes a first dimming block 210, a second dimming block 220, a fourth dimming block 240, a fifth dimming block 250, and a seventh dimming block 270. ) and the light sources belonging to the eighth dimming block 280 can be supplied with driving current.

Each of the driving elements 700 may include six driving circuits corresponding to six dimming blocks. For example, the first driving element 610 includes a first dimming block 210, a second dimming block 220, a fourth dimming block 240, a fifth dimming block 250, and a seventh dimming block 270. ) and a first driving circuit, a second driving circuit, a fourth driving circuit, a fifth driving circuit, a seventh driving circuit, and an eighth driving circuit corresponding to the eighth dimming block 280.

The driving circuits can each drive six dimming blocks. For example, when the dimming driver 170 outputs a scan signal through the first scan line S1, the first driving circuit and the second driving circuit included in the first driving element 710 may be activated. The first driving circuit and the second driving circuit with the input activated may receive an analog dimming signal through the first data line (D1) and the second data line (D2), and the first dimming block 210 and the second A driving current may be supplied to the dimming block 220.

When the dimming driver 170 outputs a scan signal through the second scan line S2, the inputs of the fourth and fifth driving circuits included in the first driving element 710 may be activated. The fourth and fifth driving circuits with activated inputs can receive analog dimming signals through the first data line (D1) and the second data line (D2), and the fourth dimming block 240 and the fifth A driving current may be supplied to the dimming block 250.

Additionally, when the dimming driver 170 outputs a scan signal through the third scan line S3, the inputs of the seventh and eighth driving circuits included in the first driving element 710 may be activated. The seventh and eighth driving circuits with activated inputs can receive analog dimming signals through the first data line (D1) and the second data line (D2), and the seventh dimming block 270 and the eighth A driving current may be supplied to the dimming block 280.

In this way, each of the driving elements 700 may receive a scan signal through a plurality of scan lines (S1, S2, S3) and an analog dimming signal through a plurality of data lines (D1, D2).

The number of scan lines S1, S2, and S3 connected to the driving elements 700 may correspond to the number of rows to which the dimming blocks 200 driven by the driving elements 700 belong. Additionally, the number of pins through which the driving element 700 receives the scan signal may correspond to the number of rows to which the dimming blocks 200 driven by the driving elements 700 belong.

The number of data lines D1 and D2 connected to the driving elements 700 may correspond to the number of columns to which the dimming blocks 200 driven by the driving elements 700 belong. Additionally, the number of pins through which the driving element 700 receives the analog dimming signal may correspond to the number of columns to which the dimming blocks 200 driven by the driving elements 700 belong.

As shown in Figures 15 and 16, even if the driving element drives the same number of dimming blocks, the number of scan signals and the number of analog dimming signals received by the driving element may be different depending on the arrangement of the driven dimming blocks. Accordingly, the driving element 600 shown in FIG. 15 and the driving element 700 shown in FIG. 16 are different driving elements.

In this way, the driving element can supply driving current to light sources included in the plurality of dimming blocks. In this case, dimming blocks whose driving current is supplied by the same driving element may form a “driving area” on the substrate. In other words, the driving area may represent an area occupied by a plurality of dimming blocks driven by one driving element in the light source device 100 or the display device 1.

Figure 17 shows an example of the first side of a substrate included in a display device according to an embodiment. Figure 18 shows a portion of the substrate shown in Figure 17. Figure 19 shows an example of a second side of a substrate included in a display device according to an embodiment. FIG. 20 shows a cross section in the direction A-A' shown in FIG. 17.

Referring to FIGS. 17, 18, 19, and 20, on the first surface 112a of the substrate 112, a plurality of light sources 111 emitting monochromatic light (for example, blue light), and a plurality of light sources 111 A plurality of driving elements 1100 that control the driving current supplied to each of the light sources 111 may be provided.

The plurality of light sources 111 include light sources connected to each other in series, and the light sources connected to each other in series may form a dimming block 1200. For example, as shown in FIG. 17, nine light sources connected in series can form a dimming block. In other words, the plurality of light sources 111 provided on the substrate 112 may be divided into a plurality of dimming blocks 1200.

Each of the plurality of driving elements 1100 may drive the dimming blocks 1200. More specifically, each of the plurality of driving elements 1100 may control the driving current supplied to the dimming blocks 1200. For example, as shown in FIG. 18, the first driving element 1110 includes a first dimming block 1210, a second dimming block 1220, a third dimming block 1230, and a fourth dimming block 1240. Light sources can be driven, and the first dimming block 1210, the second dimming block 1220, the third dimming block 1230, and the fourth dimming block 1240 can be arranged in one column and four rows. Additionally, the second driving element 1120 may drive the light sources of the fifth dimming block 1250, the sixth dimming block 1260, the seventh dimming block 1270, and the eighth dimming block 1280. The fifth dimming block 1250, the sixth dimming block 1260, the seventh dimming block 1270, and the eighth dimming block 1280 may be arranged in one column and four rows.

On the first surface 112a of the substrate 112, electrically conductive lines 1310, 1320, and 1330 through which a driving current can flow may be provided. For example, the electrically conductive lines 1310, 1320, and 1330 formed on the first surface 112a are first lines connecting the light sources 111 so that driving current is supplied to each of the light sources 111. 1310 and a second line connecting between the driving elements 1100 and the light sources 111 to supply driving current to the light sources 111 of each of the dimming blocks 1200 in the driving elements 1100. It may include lines 1320 and third lines 1330 connecting the dimming driver 170 and the driving elements 1100 to transmit a dimming signal to the driving elements 1100.

The first lines 1310 may connect the light sources 111 constituting each of the dimming blocks 1200 in series. The light sources 111 constituting each of the dimming blocks 1200 may be arranged in a matrix form with rows and columns aligned. For example, as shown in FIG. 18, nine light sources 111 constituting one dimming block may be arranged in three rows and three columns. Nine light sources 111 may be connected in series through eight first lines 1310. The eight first lines 1310 may connect the nine light sources 111 in a zigzag shape, the English letter “S”, or the number “2”.

The light sources 111 constituting each of the dimming blocks 1200 may be connected in different patterns through first lines 1310. For example, as shown in FIG. 18, the light sources constituting each of the first dimming block 1210 and the second dimming block 1220 are formed in a first pattern (in the shape of the English letter “S”) by first lines. Can be connected, and the light sources constituting each of the third dimming block 1230 and the fourth dimming block 1240 can be connected in a second pattern (shape of number “2”) by first lines.

In this way, the first lines 1310 can electrically connect the light sources 111 inside each of the dimming blocks 1200.

Each of the second lines 1320 may connect between the driving elements 1100 and the dimming blocks 1200. The second lines 1320 include dimming blocks 1210, 1220, 1230, and 1240 driven by the first driving element 1110 and dimming blocks 1250 and 1260 driven by the second driving element 1120. , 1270, 1280). In other words, the second lines 1320 are a first driving area including light sources driven by the first driving element 1110 and a second driving area containing light sources driven by the second driving element 1120. It can be placed in between.

The second lines 1320 may extend from the driving elements 1100 toward the dimming blocks 1200 in a specific direction. For example, as shown in FIG. 18, the first dimming block 1210, the second dimming block 1220, the third dimming block 1230, and the fourth dimming block ( 1240) may be arranged in a row in the y-axis direction. The second lines 1320 are connected to the first dimming block 1210, the second dimming block 1220, the third dimming block 1230, and the fourth dimming block 1240 in the y-axis direction from the first driving element 1110. ) can be extended to each.

In this way, the second lines 1320 may extend in a predetermined direction (eg, the y-axis direction shown in FIG. 18) between the dimming blocks 1200.

The third lines 1330 may extend from the dimming driver 170 to the driving elements 1100 to transmit the scan signal and the dimming signal of the dimming driver 170 to the driving elements 1100.

As shown in FIG. 18 , the third lines 1330 are disposed between the dimming blocks 1200 and may extend in the same direction as the second lines 1320 extend.

In this way, the second lines 1320 and third lines 1330 for driving and controlling the light sources 111 are provided between the dimming blocks 1200, more specifically between the driving areas, and are provided in a predetermined manner. It may extend in a direction (for example, the y-axis direction as shown in FIG. 18). Additionally, first lines 1310 connecting the light sources 111 may be provided between the light sources within the dimming block.

As described above, various electrical components (e.g., light sources, driving elements, lines of electrical conductors, etc.) for emitting light may be provided on the first surface 112a of the substrate 112. there is.

On the other hand, an electrically conductive ground plate 1500 connected to the ground of the display device 1 may be provided on the second surface 112b of the substrate 112. For example, as shown in FIG. 19, the electrically conductive ground plate 1500 provided on the second surface 112b of the substrate 112 has a pattern (e.g., a pattern for driving and controlling the light sources 111). , lines, etc.) may not be formed.

Therefore, during the process of manufacturing the substrate 112, a mask for forming a pattern on the second surface 112b of the substrate 112 is not required, and an etching process for forming a pattern on the second surface 112b is required. It may not be required. As a result, the process for manufacturing the substrate 112 is simplified, and the cost for manufacturing the substrate 112 can be reduced.

A plurality of holes 1400 may be formed on the substrate 112. As shown in FIG. 20 , each of the plurality of holes 1400 may extend through the substrate 112 from the first surface 112a to the second surface 112b of the substrate 112. Each of the plurality of holes 1400 may be larger in size than each of the vias 1510.

The holes 1400 of the substrate 112 may be used for various purposes.

The holes 1400 of the substrate 112 may be used to fix the substrate 112 during the process of mounting the light sources 111 and the driving elements 1100 on the substrate 112.

The light sources 111 and the driving elements 1100 may be mounted on the substrate 112 using, for example, surface mount technology (SMT). The substrate 112 may be fixed to a carrier jig so that the substrate 112 does not move while the light sources 111 and the driving elements 1100 are mounted on the substrate 112.

The carrier jig may include a fixing protrusion or a fixing pin for fixing the substrate 112. The fixing protrusion or fixing pin of the carrier jig may be inserted into the holes 1400 formed in the substrate 112 to fix the substrate 112. While the fixing protrusion or fixing pin of the carrier jig is inserted into the holes 1400 and the substrate 112 is fixed to the carrier jig, the light sources 111 and the driving elements 1100 are attached to the substrate 112 by heat and pressure. It can be installed.

In order to mount the light sources 111 and the driving elements 1100 on the substrate 112, the holes 1400 are arranged approximately uniformly on the substrate 112 so that the heat and pressure applied to the substrate 112 can be distributed. It can be.

The holes 1400 of the substrate 112 may be used as via holes.

The light sources 111 may be connected in series between the output terminals of the driving elements 1100 and the ground through first lines 1310. For example, among the nine light sources shown in FIG. 18, the light source of the first stage may be electrically connected to the driving element through the second line. Additionally, among the nine light sources, the second stage light source may be connected to the ground. Specifically, the light source of the second stage among the nine light sources may be electrically connected to the ground plate 1500 of the second side 112b through a via 1510 penetrating the substrate 112. Each of the vias 1510 may extend through the substrate 112 from the first side 112a to the second side 112b of the substrate 112.

Additionally, various ground patterns may be provided on the first surface 112a of the substrate 112. The ground patterns provided on the first side 112a can protect the circuits of the board 112 from electromagnetic interference (EMI) generated from the control assembly 50 and/or the power assembly 60. , electromagnetic compatibility (EMC) can be secured. Additionally, a ground plate 1500 connected to the ground of the display device 1 may be provided on the second surface 112b of the substrate 112.

The ground plate 1500 of the second side 112b is connected through vias 1510 and/or holes 1400 so that the ground patterns provided on the first side 112a can be connected to the ground of the display device 1. It may be electrically connected to ground patterns provided on the first side (112a).

In order to electrically connect the ground plate 1500 of the second side 112b with the ground patterns provided on the first side 112a, an electrically conductive material is placed inside the holes 1400 as shown in FIG. 20. For example, a metal film) may be applied. In other words, the holes 1400 formed in the substrate 112 can be used as via holes.

When charges accumulate on the ground plate 1500, the potential of the ground plate 1500 may change. As a result, the light sources 111 and/or the driving elements 1100 operate incorrectly or a large inrush current flows into the light sources 111 and/or the driving elements 1100, causing the light sources 111 and/or the driving elements 1100 to operate incorrectly. /Or the driving elements 1100 may be damaged.

The holes 1400 may be arranged approximately uniformly on the substrate 112 so that the ground plate 1500 can maintain a uniform potential.

Although the diameter of each of the holes 1400 is slightly smaller than the spacing between the light sources 111, the holes 1400 may interfere with the placement of electrically conductive lines. Accordingly, the holes 1400 can be arranged so as not to interfere with the arrangement of the electrically conductive lines 1310, 1320, and 1330.

The first lines 1310 connect the light sources 111 to each other in series within the dimming block, and the second lines 1320 and/or third lines 1330 may be arranged between the dimming blocks. there is.

Each of the holes 1400 may be provided in the dimming blocks 1200 so as not to interfere with the arrangement of the electrically conductive lines 1310, 1320, and 1330.

As shown in FIG. 18, the light sources 111 are arranged in a matrix form by aligning rows and columns, and the first lines 1310 are in the shape of the English letter "S" or the number "2" along the light sources 111. It can be arranged in any form. As a result, there is an area between the light sources 111 where the first lines 1310 are not arranged.

For example, an electrically conductive line is not disposed in an area surrounded by four adjacent light sources 1211, 1212, 1213, and 1214 in the first dimming block 1210. Therefore, the first hole 1410 disposed in the area surrounded by the four light sources 1211, 1212, 1213, and 1214 adjacent to each other in the first dimming block 1210 interferes with the arrangement of the first lines 1310. You may not do it.

On the other hand, second lines 1320 and/or third lines 1330 may be disposed in the area between the dimming blocks 1200. Specifically, dimming blocks 1210, 1220, 1230, and 1240 driven by the first driving element 1110 and dimming blocks 1250, 1260, 1270, and 1280 driven by the second driving element 1120. There are second lines 1320 extending from the first driving element 1110 to the dimming blocks 1210, 1220, 1230, and 1240, and second lines extending from the dimming driver 170 to the first driving element 1110. Three lines 1330 may be arranged. If the first hole 1410 is disposed between the dimming blocks 1210, 1220, 1230, and 1240 and the dimming blocks 1250, 1260, 1270, and 1280, the first hole 1410 is positioned between the second lines. It may interfere with the arrangement of 1320 and/or third lines 1330.

In this way, the holes 1400 may be placed in the dimming blocks 1200 so as not to interfere with the arrangement of the second lines 1320 and/or the third lines 1330. Specifically, the holes 1400 may be provided in an approximately square area surrounded by four light sources adjacent to each other. The four light sources are light sources within one dimming block and can be connected to each other in series.

Figure 21 shows an example of the first side of a substrate included in a display device according to an embodiment. Figure 22 shows a portion of the substrate shown in Figure 21.

21 and 22, on the first surface 112a of the substrate 112, a plurality of light sources 111 emitting monochromatic light (for example, blue light), and a plurality of light sources 111 A plurality of driving elements 1600 may be provided to control the driving current supplied to each.

The plurality of light sources 111 include light sources connected to each other in series as shown in FIG. 21, and the light sources connected to each other in series may form a dimming block 1700.

Each of the plurality of driving elements 1600 may drive the dimming blocks 1700. More specifically, each of the plurality of driving elements 1600 may control the driving current supplied to the dimming blocks 1700. As shown in FIG. 22, the first driving element 1610 includes a first dimming block 1710, a second dimming block 1720, a third dimming block 1730, a fourth dimming block 1740, and a fifth dimming block. The light sources of the block 1750 and the sixth dimming block 1760 can be driven. The dimming blocks 1710, 1720, 1730, 1740, 1750, and 1760 driven by the first driving element 1610 may be arranged in two columns and three rows.

On the first surface 112a of the substrate 112, electrically conductive lines 1810, 1820, and 1830 are connected between the light sources 111, first lines 1810, and driving elements 1600. Second lines 1820 connecting the light sources 111 and third lines 1830 connecting the dimming driver 170 and the driving elements 1600 may be provided.

The first lines 1810 may connect the light sources 111 constituting each of the dimming blocks 1200 in series. As shown in FIG. 22, eight first lines 1810 connect nine light sources 111 in a zigzag shape or in the form of the English letter “S” or in the form of the number “2” within the dimming block. You can.

Each of the second lines 1820 may connect between the driving elements 1600 and the dimming blocks 1700. The second lines 1820 may be arranged between dimming blocks driven by one driving element. For example, each of the second lines 1820 may be disposed between dimming blocks 1710, 1720, 1730, 1740, 1750, and 1760 driven by the first driving element 1110.

Dimming blocks 1710, 1720, 1730, 1740, 1750, and 1760 may be arranged in 2 columns and 3 rows. The dimming blocks 1710, 1720, and 1730 may be arranged in a first row, and the dimming blocks 1740, 1750, and 1760 may be arranged in a second row. The second lines 1820 may be disposed between the first row of dimming blocks 1710, 1720, and 1730 and the second row of dimming blocks 1740, 1750, and 1760.

The second lines 1820 may extend from the driving elements 1600 toward the dimming blocks 1700 in a specific direction. For example, as shown in FIG. 22, the second lines 1820 are connected to the first dimming block 1710, the second dimming block 1720, and the third dimming block in the y-axis direction from the first driving element 1610. It may extend to each of the block 1730, the fourth dimming block 1740, the fifth dimming block 1750, and the sixth dimming block 1760.

The third lines 1830 may extend from the dimming driver 170 to the driving elements 1600 to transmit the scan signal and the dimming signal of the dimming driver 170 to the driving elements 1600.

Third lines 1830 may be disposed between dimming blocks. However, the third lines 1830 may be disposed outside the dimming blocks driven by one driving element.

As shown in FIG. 22, the third lines 1830 may be disposed outside the dimming blocks 1710, 1720, 1730, 1740, 1750, and 1760 driven by the first driving element 1110. . In addition, the third lines 1830 are between the dimming blocks 1710, 1720, 1730, 1740, 1750, and 1760 driven by the first driving element 1110 and the dimming blocks driven by other driving elements. can be placed.

In this way, the second lines 1820 may be arranged between dimming blocks driven by one driving element. Additionally, the third rides 1830 may be disposed between dimming blocks driven by different driving elements.

A plurality of holes 1900 may be formed on the substrate 112. Each of the plurality of holes 1900 may extend through the substrate 112 from the first surface 112a to the second surface 112b of the substrate 112.

The holes 1900 may be used to fix the substrate 112 during the process of mounting the light sources 111 and the driving elements 1600 on the substrate 112. Additionally, the holes 1900 may be used as via holes.

Although the diameter of each of the holes 1900 is slightly smaller than the spacing between the light sources 111, the holes 1900 may interfere with the placement of electrically conductive lines. Accordingly, the holes 1900 can be arranged so as not to interfere with the placement of electrically conductive lines.

Each of the holes 1900 may be provided in the dimming blocks 1200 so as not to interfere with the arrangement of the electrically conductive lines 1810, 1820, and 1830.

As shown in FIG. 22, the light sources 111 are arranged in a matrix form by aligning rows and columns, and the first lines 1810 are in the shape of the English letter “S” or the number “2” along the light sources 111. "It can be placed in the form. As a result, there is a region between the light sources 111 where the first lines 1810 are not disposed. For example, an electrically conductive line is not disposed in an area surrounded by four adjacent light sources 1711, 1712, 1713, and 1714 in the first dimming block 1710.

Each of the holes 1900 may be placed in an area surrounded by four light sources adjacent to each other within the dimming block. Here, four light sources adjacent to each other may be connected in series. Accordingly, each of the holes 1900 may be arranged so as not to interfere with the arrangement of the first lines 1810, the second lines 1820, and/or the third lines 1830.

As described above, the disclosed embodiments have been described with reference to the attached drawings. A person skilled in the art to which the disclosed embodiments belong will understand that the disclosed embodiments may be implemented in forms different from the disclosed embodiments without changing the technical idea or essential features of the disclosed embodiments. The disclosed embodiments are illustrative and should not be construed as limiting.

10: display device 11: main body
12: Screen 20: Liquid crystal panel
30: panel driver 50: control assembly
60: Power assembly 80: Content receiving unit
81: Receiving terminal 82: Tuner
90: Image processing unit 91: Processor
92: Memory 100: Light source device
110: light source module 111: light source
112: substrate 120: reflective sheet
120a: Through hole 130: Diffusion plate
140: optical sheet 141: diffusion sheet
142: first prism sheet 143: second prism sheet
144: Reflective polarizing sheet 170: Dimming driver
180: transparent dome 190: light emitting diode
200: Dimming block

Claims (20)

liquid crystal panel;
A plurality of light sources emitting light; and
It includes a substrate including a plurality of dimming blocks arranged in rows and columns,
Each of the plurality of dimming blocks includes at least four light sources connected in series among the plurality of light sources,
At least four light sources included in one dimming block are arranged in rows and columns on the first side of the substrate,
The substrate is provided with a plurality of holes penetrating the substrate,
Each of the plurality of holes electrically connects a first side of the substrate to a second side of the substrate,
A display device in which each of the plurality of holes is provided in an area surrounded by at least four light sources included in one dimming block. According to paragraph 1,
The substrate includes electrically conductive lines,
A display device wherein the electrically conductive lines pass between a dimming block and another dimming block. According to paragraph 1,
The substrate includes first lines connecting in series at least four light sources included in the one dimming block,
A display device where each of the plurality of holes is disposed between the first lines. According to paragraph 3,
Each of the plurality of dimming blocks includes nine light sources,
The nine light sources are arranged in three rows and three columns,
The first lines connect the nine light sources in the form of the English letter “S” or the number “2.” The method of claim 1, wherein the display device:
a first driving element that controls driving current supplied to at least four light sources included in each of the first dimming blocks among the plurality of dimming blocks; and
Further comprising a second driving element that controls driving current supplied to at least four light sources included in each of the second dimming blocks among the plurality of dimming blocks,
The first dimming blocks, the second dimming blocks, the first driving element, and the second driving element are provided on the first side of the substrate. According to clause 5,
The first dimming blocks and the second dimming blocks are arranged in a row,
The substrate includes second lines extending from the first driving element to each of the first dimming blocks,
The second lines are provided between the first dimming blocks and the second dimming blocks. According to clause 6,
The substrate includes third lines transmitting a dimming signal to the first driving element,
The third lines are provided between the first dimming blocks and the second dimming blocks. According to clause 5,
The first dimming blocks are arranged in a plurality of rows and a plurality of columns,
The substrate includes second lines extending from the first driving element to each of the first dimming blocks,
The second lines are provided between first dimming blocks arranged in a plurality of rows and a plurality of columns. According to clause 8,
The substrate includes third lines transmitting a dimming signal to the first driving element,
The third lines are provided between the first dimming blocks and the second dimming blocks. According to clause 5,
The first driving element is disposed between the first dimming blocks,
The second driving element is a display device disposed between the second dimming blocks. According to clause 10,
A display device wherein the relative position of the first driving element within the first dimming blocks is different from the relative position of the second driving element within the second dimming blocks. The method of claim 5, wherein each of the first driving element and the second driving element,
first transistor;
a capacitor connected to the control terminal of the first transistor; and
A display device including a second transistor connected to a control terminal of the first transistor. According to paragraph 1,
The substrate includes a ground plate provided on the second side,
A display device wherein the ground plate is electrically connected to the plurality of holes. The method of claim 1, wherein each of the plurality of light sources is:
A display device including a light emitting diode provided on a substrate using a chip on board (COB) method and an optical dome with an arcuate or semicircular cross section. According to clause 14,
The intensity of a first light beam emitted from the light emitting diode in a first direction perpendicular to the substrate is smaller than the intensity of a second light beam emitted from the light emitting diode in a second direction different from the first direction. A plurality of light sources emitting light; and
It includes a substrate including a plurality of dimming blocks arranged in rows and columns,
Each of the plurality of dimming blocks includes at least four light sources connected in series among the plurality of light sources,
At least four light sources included in one dimming block are arranged in rows and columns on the first side of the substrate,
The substrate is provided with a plurality of holes penetrating the substrate,
Each of the plurality of holes electrically connects a first side of the substrate to a second side of the substrate,
A light source device in which each of the plurality of holes is provided in an area surrounded by at least four light sources included in one dimming block. According to clause 16,
The substrate includes electrically conductive lines,
A light source device wherein the electrically conductive lines pass between a dimming block and another dimming block. According to clause 16,
The substrate includes first lines connecting in series at least four light sources included in the one dimming block,
Each of the plurality of holes is disposed between the first lines. According to clause 18,
Each of the plurality of dimming blocks includes nine light sources,
The nine light sources are arranged in three rows and three columns,
The first lines connect the nine light sources in the form of the English letter “S” or the number “2.” According to clause 16,
The substrate includes a ground plate provided on the second side,
The ground plate is electrically connected to the plurality of holes.

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