CN115327812A

CN115327812A - Full-array light-emitting diode curved-surface lamp panel, curved-surface backlight module and curved-surface liquid crystal display

Info

Publication number: CN115327812A
Application number: CN202110513071.1A
Authority: CN
Inventors: 陈杰; 廖俊旭; 吴秉霖
Original assignee: Maven Optronics Co Ltd
Current assignee: Maven Optronics Co Ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2022-11-11

Abstract

The invention provides a full-array light-emitting diode curved-surface lamp panel, a curved-surface backlight module comprising the lamp panel and a curved-surface liquid crystal display comprising the backlight module. The lamp plate comprises a flexible reflector and a plurality of lamp strips, the plurality of lamp strips are provided with a plurality of light-emitting diodes, the plurality of lamp strips are attached to the rear side surface of the flexible reflector along the height direction of the lamp plate, and the light-emitting diodes of the plurality of lamp strips are exposed out of a liquid crystal display panel from the opening of the flexible reflector. Along the width direction of this lamp plate, this flexible reflection piece flexible forms a reflection curved surface of this lamp plate. Moreover, each light bar comprises a strip-shaped printed circuit board consisting of a plurality of dimming partition circuits, and full-array regional dimming of the lamp panel can be realized by independently controlling the current of each dimming partition circuit.

Description

Full-array light-emitting diode curved-surface lamp panel, curved-surface backlight module and curved-surface liquid crystal display

Technical Field

The present invention relates to a Light Emitting Diode (LED) lamp Panel, a Light Emitting Diode (LED) Backlight Module, and a Liquid Crystal Display (LCD). More particularly, the present invention relates to a Curved Light Panel (Curved Full-Array LED Light Panel), a Curved backlight module and a Curved liquid crystal display.

Background

Full-Array Local Dimming (Full-Array Local Dimming) is a technology for regulating and controlling the brightness of a backlight source of a liquid crystal display by regions, and the backlight source is divided into different regions and is regulated in brightness change of different degrees, so that the power consumption of the liquid crystal display can be greatly reduced, the Contrast Ratio (Contrast Ratio) of a display picture can be improved, the gray scale number can be increased, and the ghost can be reduced. The technology of the liquid crystal display can more easily display vivid and rich colors to improve the image quality as the image contrast of the liquid crystal display is higher. Full-array local Dimming ideally is desirable to control the brightness of each Light Emitting Diode (LED) in the LED backlight module separately and independently, but generally speaking, all LEDs in the LED backlight module are divided into a plurality of Dimming Zones (Dimming Zones) and the consistent brightness of the LEDs in each Dimming zone is controlled separately and independently. When the number of the dimming partitions is set to be larger, the size of the dimming partition is smaller, and the image contrast quality is better, and through proper design of the dimming partition, the image contrast can reach 1,000,000.

In order to implement a full-array area dimming flat liquid crystal display (i.e., a flat liquid crystal display including a flat led backlight module), a non-flexible printed circuit board (i.e., a flat printed circuit board) is conventionally used as a light emitting diode panel in the led backlight module, wherein the light emitting diodes disposed on a front side surface of the non-flexible printed circuit board are divided into a plurality of dimming sections, and a driving circuit for controlling the plurality of dimming sections respectively and independently may be disposed on a rear side surface of the non-flexible printed circuit board.

Curved lcds offer advantages such as more realistic experience, reduced image distortion, relaxed eyes, and larger perceived visual field than flat lcds, and are therefore widely used in medium-sized lcd monitors or large-sized lcd tvs. At present, curved-surface liquid crystal displays mostly use curved side-in light bars and curved-surface light guide plates as backlight modules thereof, and therefore, full-array area dimming cannot be realized. If the flexible printed circuit board is used as a full-array area dimming backlight panel required by a curved surface of a curved surface computer liquid crystal monitor or a curved surface liquid crystal television, and the required area is relatively large, the cost of the flexible printed circuit board is too high, and the curved surface liquid crystal display is a straight line along the height direction and only needs to form a curved surface along the width direction. In other words, the curved lcd only needs a one-dimensional curved surface, and the flexible printed circuit board can form two-dimensional curved surfaces along the height direction and the width direction at the same time, so the mechanical strength of the flexible printed circuit board along the height direction is not enough to support the weight of the driving circuit required by the full-array local dimming to form a straight line, which is not the best choice. Therefore, there is no suitable method for improving the contrast and image quality of a curved-surface lcd (i.e., a curved-surface lcd including a curved-surface led backlight module) by full-array local dimming.

Therefore, how to improve the above-mentioned shortcomings and apply the full-array local dimming to the medium-large curved-surface liquid crystal display, so that the industry successfully establishes a solution meeting the market requirement, is an important problem in the technical field of the present invention.

Disclosure of Invention

To solve at least the above problems, the present invention provides a Full-Array LED Curved Panel (Full-Array LED Curved Light Panel) which comprises a plurality of Light Bars (Light Bars) and a Flexible Reflective Sheet (Flexible Reflective Sheet), wherein each of the plurality of Light Bars comprises a Bar-Shaped printed circuit board (Bar-Shaped PCB) and a plurality of LEDs disposed on a front side surface of the Bar-Shaped PCB. The circuit of the strip-shaped printed circuit board of each light bar is further divided into a plurality of Dimming Zone Circuits (Dimming Zone Circuits). Each Dimming partition circuit is electrically connected with at least one light emitting diode to adjust the light emitting intensity of the at least one light emitting diode of the Dimming partition circuit, so that Local Dimming (Local Dimming) of the full-array light emitting diode curved lamp panel is realized. The flexible reflector has a plurality of first openings corresponding to positions of a full array of light emitting diodes. The plurality of light bars are attached to a rear side surface of the flexible reflection sheet along a height direction of the flexible reflection sheet by an adhesive, and the plurality of light emitting diodes of the plurality of light bars are exposed from the plurality of first openings of the flexible reflection sheet toward a liquid crystal display Panel (LCD Panel). Along a width direction of the flexible reflector plate, the rear side surface of the flexible reflector plate is bent towards a front side surface of the flexible reflector plate to form a reflecting curved surface of the full-array light-emitting diode curved-surface lamp panel.

In order to solve at least the above problems, the present invention further provides a Full-Array LED Curved Backlight Module (a Curved-surface LED Backlight Module), which may include the above Full-Array LED Curved panel, an Optical Film set (Optical Film Stack), and a Rear Frame (real Frame), wherein the Optical Film set is disposed facing the front side surface of the flexible reflector, and the Rear Frame is configured to accommodate the Full-Array LED Curved panel and the Optical Film set.

In order to solve at least the above problems, the present invention further provides a curved liquid crystal display, which may include a curved liquid crystal display panel, the full-array led curved backlight module, and a Front Frame (Front Frame), wherein the full-array led curved backlight module is used to provide a light source required by the curved liquid crystal display panel, and the Front Frame is used to accommodate the curved liquid crystal display panel and is combined with the rear Frame of the full-array led curved backlight module.

As described above, the full-array led curved panel provided by the present invention includes a flexible reflector and a plurality of light bars that are not connected to each other, wherein the plurality of light bars are attached to a rear surface of the flexible reflector, each light bar includes a strip-shaped pcb and a plurality of leds disposed on a front surface of the strip-shaped pcb, and the plurality of leds disposed on the strip-shaped pcb are exposed from a plurality of first openings of the flexible reflector toward a liquid crystal display panel. By such an arrangement, a non-flexible printed circuit board can be selected as the plurality of strip-shaped printed circuit boards. Compared with a flexible printed circuit board, the non-flexible printed circuit board has lower cost and enough mechanical strength to support the weight of a driving circuit which is required by full-array regional dimming and is arranged on the printed circuit board, so the full-array light-emitting diode curved lamp panel provided by the invention is beneficial to realizing the full-array regional dimming. Therefore, the full-array light-emitting diode curved-surface lamp panel, the full-array light-emitting diode curved-surface backlight module and the curved-surface liquid crystal display provided by the invention can provide curved-surface display and also have a full-array regional dimming function.

The foregoing is not intended to limit the present invention but merely to generally describe the technical problems which can be solved, the technical means which can be employed and the technical effects which can be achieved. Further details of various embodiments of the present invention can be understood by those of ordinary skill in the art from a review of the attached drawings and the description of the embodiments that follow.

Drawings

The accompanying drawings may assist in describing various embodiments of the invention, wherein:

FIG. 1 is an exploded view of a curved liquid crystal display according to some embodiments of the invention;

FIG. 2 is an exploded view of a full-array LED curved backlight module according to some embodiments of the invention;

FIG. 3A illustrates a full array LED curved panel according to some embodiments of the invention;

FIG. 3B is an exploded view of the full array LED curved panel shown in FIG. 3A;

FIG. 4 illustrates a printed circuit board and electrical schematic diagram of a light bar in a full-array LED curved panel, in accordance with certain embodiments of the present invention;

FIGS. 5A and 5B respectively illustrate a PCB of a light bar in a full-array LED curved panel according to some other embodiments of the present invention;

FIG. 6 illustrates a schematic diagram of a full-array area dimming backlight source provided by a full-array LED curved backlight module according to some embodiments of the invention;

FIG. 7 illustrates an optical film set support pin in a full-array LED curved backlight module according to some embodiments of the invention;

FIG. 8 illustrates a partial structure of a full array LED curved backlight module according to some embodiments of the invention;

FIG. 9 illustrates curvature of a liquid crystal display according to some embodiments of the invention;

FIG. 10A illustrates a continuous thermal transfer tape according to some embodiments of the present invention;

FIG. 10B illustrates strips of thermally conductive adhesive tape that are not connected to one another, in accordance with certain embodiments of the present invention;

fig. 11A illustrates electrical and signal connections between a light bar and the centralized local dimming driver module and the local dimming controller module in the full-array led curved backlight module according to some embodiments of the present invention;

fig. 11B illustrates electrical and signal connections between a light bar and the centralized local dimming driver module and the local dimming controller module in a full-array led curved backlight module according to some other embodiments of the present invention;

fig. 12A and 12B illustrate the arrangement, electrical connection and control structure of the local dimming controller module and the centralized local dimming driver module in the full-array led curved backlight module according to some embodiments of the present invention;

FIG. 13 illustrates electrical and signal connections between a light bar and a distributed local dimming driver module and local dimming controller module in a full-array LED curved backlight module according to some embodiments of the present invention; and

fig. 14A and 14B illustrate the configuration, electrical connection and control structure of the local dimming controller module and the distributed local dimming driver module in the full-array led curved backlight module according to some embodiments of the invention.

[ notation ] to show

As follows:

1: curved surface liquid crystal display

91: full-array light-emitting diode curved surface backlight module

93: curved surface liquid crystal display panel

95: front frame

x, y, z: mutually perpendicular axes

21: full-array LED curved lamp panel

23: optical film group

25: heat-conducting adhesive tape

27: rear frame

11: light bar

11A: front side surface of light bar

11B: rear side surface of light bar

111: strip-shaped printed circuit board

113: light emitting diode

115: optical diaphragm group support pin

13: flexible reflector sheet

13A: front side surface of a flexible reflector sheet

13B: rear side surface of flexible reflector sheet

131: first opening of flexible reflector

133: second opening of the flexible reflector

Z1-Zn: dimming partition circuit

P1: first pitch

VLED: power supply port

LED-1 to LED-n: driving signal port

H1: height of the light strip

W1: width of light bar

OD: optical distance

P2: second pitch

R1: first radius

R2: second radius

117: connector with a locking member

20: main printed circuit board

201: local dimming controller module

203: centralized local dimming driver module

203A, 203B, 201B: connector with a locking member

111-1 to 111-m: strip-shaped printed circuit board

2031-1 to 2031-m: sub-module of centralized regional dimming driver module

30: communication module

32: temporary memory system

34: multi-channel signal generator

36: multi-channel current driving circuit

CH1 to CHn: channel

205. 205-1 to 205-m: distributed local dimming driver module

Detailed Description

The present invention is illustrated by various examples, which are not intended to limit the present invention to only those embodiments in accordance with the described operations, environments, applications, structures, processes, or steps. For the sake of easy explanation, those not directly related to the embodiments of the present invention or those understood without specific explanation will be omitted in this document and the drawings. In the drawings, the sizes of the elements (elements) and the ratios between the elements are merely examples, and are not intended to limit the present invention. In the following, the same reference numerals correspond to the same components, except where otherwise specified.

Unless specifically stated otherwise, "a" and "an" are not intended to be limiting in number, and should be interpreted as "one or more". The terms "comprising" or "including" do not exclude the presence of other elements than those listed unless the context clearly dictates otherwise. The term "and/or" means any and all combinations of the listed items unless the context clearly dictates otherwise.

Reference is now made to FIG. 1, which is an exploded view of a curved liquid crystal display, according to some embodiments of the present invention. The illustration of fig. 1 is provided as an example and not intended to limit the claims.

As shown in fig. 1, a curved lcd 1 may include a full-array led curved backlight module 91, a curved lcd panel 93, and a front frame 95. The full-array led curved backlight module 91 may be used to provide the light source for the curved lcd panel 93, and the front frame 95 may be used to accommodate the curved lcd panel 93 and be combined with a rear frame included in the full-array led curved backlight module 91.

The curved liquid crystal display panel 93 may be a liquid crystal display panel used in various curved liquid crystal displays, and is assembled in the front and rear frames while forming a curved surface. For example, the curved Liquid Crystal Display Panel 93 may be a Thin Film Transistor Liquid Crystal Display (TFT-LCD) Panel. The TFT-LCD panel may include a multi-layered structure, which basically includes a lower polarizing plate, a thin film transistor substrate, a liquid crystal layer, an upper polarizing plate, a color filter, and the like, from bottom to top. When current passes through the transistor on the TFT substrate, the liquid crystal molecules in the liquid crystal layer can be deflected, so that the polarization of light can be changed, and the bright and dark states of pixels can be determined by utilizing the polarizer. In addition, each pixel of the color filter can include three colors of red, blue, green and so on, and the pixels emitting red, blue, green and so on form an image picture.

Referring to fig. 1 and 2, fig. 2 is an exploded view of a full-array led curved backlight module according to some embodiments of the invention. The illustration of fig. 2 is provided as an example and not to limit the claims.

As shown in fig. 2, the curved backlight module 91 may include a curved panel 21, an Optical Film Stack (Optical Film Stack) 23, a thermal tape 25, and a Rear Frame (real Frame) 27. The structure of the rear frame 27 and the front frame 95 of the curved liquid crystal display 1 are matched with each other for combining with the front frame 95 of the curved liquid crystal display 1.

The optical film assembly 23 may include a Quantum Dot Enhancement Film (QDEF), a brightness enhancement film, a diffusion film, or a combination thereof. The quantum dot enhanced film can convert the backlight light source generated by the full-array light emitting diode curved lamp panel 21 into a white backlight light source, for example, the full-array light emitting diode curved lamp panel 21 is composed of blue light emitting diodes, the generated blue light can be partially converted into red light and green light of relatively pure colors after passing through the quantum dot enhanced film, and the partial blue light and the partial converted red light and green light form a white backlight light source. The brightening membrane is a membrane for correcting the direction of light by means of the principle of refraction and reflection of light, can concentrate the light on the front, can recycle and utilize the light which is not utilized outside the visual angle, and can improve the overall brightness and uniformity to achieve the brightening effect, so the brightening membrane is also called as a light-gathering Sheet or a Prism Sheet (Prism Sheet). Diffusion sheet the diffusion sheet is capable of providing a uniform surface light source for the curved liquid crystal display 1. In particular, since the diffusion film has scattering particles, light continuously passes through two media with different refractive indexes when passing through the diffusion film, and thus the light undergoes many refraction, reflection and scattering phenomena, which results in an optical diffusion effect.

Referring to fig. 1, 2, 3A and 3B, fig. 3A illustrates a full-array led curved panel according to some embodiments of the invention, and fig. 3B is an exploded view of the full-array led curved panel shown in fig. 3A. The illustration in fig. 3A and 3B is for exemplary purposes only and is not intended to limit the present disclosure.

As shown in fig. 3A and 3B, the curved panel 21 may include a plurality of light bars 11 and a flexible reflector 13. Each light bar 11 has a front surface 11A and a rear surface 11B, and each light bar 11 includes a strip-shaped pcb 111 and a plurality of leds 113 disposed on the front surface 11A of the strip-shaped pcb 111. The flexible reflector 13 has a front surface 13A and a back surface 13B, and has a plurality of first openings 131 corresponding to positions of a full array of leds. The plurality of first openings 131 may be rectangular openings, circular openings, or other shaped openings. Referring to fig. 1, fig. 2, fig. 3A and fig. 3B together, the plurality of light bars 11 are respectively attached to the rear side surface 13B of the flexible reflective sheet 13 by an adhesive along a height direction (a direction parallel to the y-axis) of the flexible reflective sheet 13, and the plurality of light emitting diodes 113 of the plurality of light bars 11 are exposed from the plurality of first openings 131 of the flexible reflective sheet 13 toward the liquid crystal display panel 93 of the curved liquid crystal display 1. Along a width direction (a direction parallel to the x axis) of the flexible reflector 13, the rear surface 13B of the flexible reflector 13 is curved toward the front surface 13A of the flexible reflector 13 to form a curved reflective surface of the curved led lamp panel 21.

The thickness of the flexible reflector 13 can be determined according to the requirement. For example, a thickness of the flexible reflective sheet 13 may be no greater than 500 microns, no greater than 300 microns, no greater than 200 microns, no greater than 100 microns, or no greater than other values.

The reflectivity of the flexible reflector 13 can be determined according to the requirement. For example, the reflectivity of the flexible reflective sheet 13 may be not less than 85%, not less than 90%, or not less than 95%, or not less than other values.

The plurality of leds 113 of the plurality of light bars 11 may be composed of one of the following: blue light emitting diode, white light emitting diode converted by photoluminescence material, deep violet light emitting diode, ultraviolet light emitting diode, or combination of red light emitting diode, green light emitting diode and blue light emitting diode arranged alternatively. If the plurality of leds 113 are blue leds, deep violet leds or uv leds, the optical film assembly 23 may comprise a quantum dot enhancement film for converting blue light into white light; if the plurality of leds 113 are white leds converted by photoluminescent materials or a combination of red leds, green leds and blue leds arranged alternately, the optical film set 23 does not need to include a quantum dot enhancement film.

The LEDs 113 of the light bars 11 can be submillimeter-sized LEDs (Mini LEDs) or conventional-sized LEDs. Under the condition of extremely low power consumption, the use of a large number of full-array submillimeter light-emitting diodes can improve the brightness of the full-array light-emitting diode curved-surface lamp panel 21 to reach the brightness of a full picture of 1,000 nits (nits), and the local picture range can reach the ultrahigh brightness of 2,000 nits. In addition, the backlight light source with more dimming subareas can be realized by using more full-array sub-millimeter light-emitting diodes, and the adjustment of the brightness change of different degrees is carried out, so that the power consumption of the liquid crystal display can be greatly reduced, the Contrast Ratio (Contrast Ratio) of a display picture is improved, the gray scale number is increased, the ghost shadow is reduced, and when the Contrast Ratio of the liquid crystal display is higher, vivid and rich colors can be more easily displayed so as to improve the image quality of the liquid crystal display.

The material of the strip-shaped printed circuit board 111 can be determined according to the application requirements. For example, the strip-shaped printed circuit board 111 may be a printed circuit board composed of one of the following materials: epoxy resin (FR-4), bismaleimide-modified triazine resin (BT), aluminum (Aluminum), or Polyimide (Polyimide). In addition, the strip-shaped printed circuit board 111 may be a non-flexible printed circuit board or a flexible printed circuit board.

Referring to fig. 1, fig. 2, fig. 3A, fig. 3B, and fig. 4, fig. 4 illustrates a printed circuit board of a light bar in a full-array led curved panel and a circuit diagram thereof according to some embodiments of the invention. The illustration of fig. 4 is for exemplary purposes only and is not intended to limit the present claims.

As shown in fig. 4, the circuit of the strip-shaped pcb 113 of each light bar 11 can be divided into a plurality of Dimming Zone Circuits (Dimming Zone Circuits), and each Dimming Zone circuit is electrically connected to at least one led 113 to adjust the light intensity of the at least one led of the Dimming Zone circuit, so as to implement the local Dimming of the full-array led curved-surface lamp panel 21. For example, the curved led panel 21 may include m light bars 11, the circuit of the strip-shaped pcb 113 of each light bar 11 is divided into n dimming partition circuits (denoted as Z1-Zn), and p leds 113 are disposed in each dimming partition circuit, so that the curved led backlight module 91 can provide m × n × p led light sources. The number of dimming partitions of the full-array led curved backlight module 91, i.e. the number of mxn, can be set to be several tens to several tens of thousands according to the application requirement. The p leds in each dimming partition circuit may be connected in series, in parallel, or a combination thereof. The anodes of the LEDs in the plurality of dimming partition circuits (labeled Z1-Zn) may be commonly connected to a power supply port VLED, and the cathodes of the LEDs in the plurality of dimming partition circuits may be respectively connected to a driving signal port (labeled LED-1-LED-n).

As shown in fig. 4, in some embodiments, the leds 113 on each light bar 11 may be arranged in two columns parallel to each other. In addition, the ratio of the number of the m light bars to the height H1 and the width W1 of the light bars 11 can be determined according to the size of the curved liquid crystal display panel; for example, the ratio of the height H1 to the width W1 of each light bar 11 may be not less than 5, not less than 10, not less than 20, or not less than other values. In an embodiment of a 32-inch curved liquid crystal display panel, such as the light bar 11 shown in fig. 4, the height H1 and the width W1 may be 406 mm and 16.2 mm, respectively.

Referring next to fig. 5A and 5B, fig. 5A and 5B respectively illustrate a printed circuit board and a circuit of a light bar in a full-array led curved panel according to some other embodiments of the invention. The content shown in fig. 5A or fig. 5B is only used as an example and is not intended to limit the claims of the present application.

As shown in fig. 5A, in some embodiments, the leds 113 in each light bar 11 can be arranged as a single column, and the ratio of the height H1 to the width W1 of each light bar 11 can be not less than 5, not less than 10, not less than 20, not less than 30, or not less than other values. As shown in fig. 5B, in some embodiments, the leds 113 on each light bar 11 can also be arranged in three parallel columns, and the ratio of the height H1 to the width W1 of each light bar 11 can be not less than 5, not less than 10, not less than 15, or not less than other values. In some embodiments, the leds 113 on each light bar 11 can be arranged in more columns parallel to each other.

Referring to fig. 1-5 and fig. 6, fig. 6 illustrates a schematic diagram of a full-array local dimming backlight source provided by a full-array led curved backlight module according to some embodiments of the present invention. In the above, the full-array local dimming module of the lcd divides the image signal into m × n dimming areas, performs brightness analysis and calculation according to each image area of the corresponding dimming area, and then automatically controls the brightness of the backlight light source of each area. Therefore, the backlight light source for dimming the full-array area can be used for adjusting the brightness change in different areas and different degrees, the power consumption can be greatly reduced, the contrast of a display picture is improved, the gray scale number is increased, the ghost shadow is reduced, and the image quality of the full-array area dimming liquid crystal display is improved. Compared with the traditional non-local dimming LCD, the backlight light source is generally in a full bright state, and when a dark-state picture is displayed, the backlight light source can only be realized by reducing the liquid crystal transmittance, so that the backlight light source does not help to reduce the power consumption. In contrast, when the full-array local dimming lcd displays a dark-state image, the brightness of the plurality of leds 113 in the dimming partition is reduced accordingly to display the dark-state image, so that the power consumption of the entire backlight source can be reduced. The illustration of fig. 6 is for exemplary purposes only and is not intended to limit the present claims.

As described above, the full-array led curved panel 21 includes the flexible reflector 13 and the plurality of light bars 11 that are not connected to each other, wherein the plurality of light bars 11 are attached to the rear side surface 13B of the flexible reflector 13, each light bar 11 includes a strip-shaped printed circuit board 111 and a plurality of leds 113 disposed on the front side surface 11A of the strip-shaped printed circuit board 111, and the plurality of leds 113 disposed on the strip-shaped printed circuit board 111 are exposed from the plurality of first openings 131 of the flexible reflector 13 toward the lcd panel 93 of the curved lcd 1. With this arrangement, a non-flexible printed circuit board can be selected as the strip-shaped printed circuit board 111 while maintaining the curved display. Compared with a flexible printed circuit board, the flexible printed circuit board has low cost, and if the driving circuit required by regional dimming needs to be arranged on the lamp strip 11, the flexible printed circuit board has enough mechanical strength to support the weight of the driving circuit required by full-array regional dimming, so that the flexible printed circuit board is more favorable for manufacturing, and the full-array light-emitting diode curved lamp panel 21 is favorable for realizing full-array regional dimming of the curved lamp panel. Accordingly, the curved lamp panel 21 of the full-array led, the curved backlight module 91 of the full-array led, and the curved lcd 1 can provide curved display and have a function of dimming the full-array area. Therefore, as shown in fig. 6, through various local dimming algorithms, the full-array led curved backlight module 91 can form a curved light source with uneven brightness according to the curved image to be displayed, thereby improving the image quality of the curved liquid crystal display 1.

Referring to fig. 3A, 3B, 7 and 8, fig. 7 illustrates an optical film set supporting pin of a full-array led curved backlight module according to some embodiments of the invention, and fig. 8 illustrates a partial structure of the full-array led curved backlight module according to some embodiments of the invention. The illustration of fig. 7 or 8 is for exemplary purposes only and is not intended to limit the present claims.

As shown in fig. 3A, 3B, 7 and 8, in some embodiments, the flexible reflective sheet 13 may further include a plurality of second openings 133, and the plurality of light bars further include a plurality of optical film set Support pins (Support pins) 115. The plurality of second openings 133 may be rectangular openings, circular openings, or other openings to meet different requirements. The plurality of optical film set supporting pins 115 may be disposed on the front side surface 11A of the plurality of strip-shaped printed circuit boards 111 of the plurality of light bars 11 and exposed from the plurality of second openings 133 of the flexible reflective sheet 13 toward the liquid crystal display panel 93 of the curved liquid crystal display 1. In addition, the Optical diaphragm group 23 is disposed in contact with the plurality of Optical diaphragm group support pins 115 exposed from the plurality of second openings 133 of the flexible reflection sheet 13 to form an Optical Distance (Optical Distance) OD between the flexible reflection sheet 13 and the Optical diaphragm group 23. In other words, the height of the optical film group support pin 115 determines the optical distance OD between the flexible reflection sheet 13 and the optical film group 23. The optical distance OD can be determined as desired. For example, the optical distance OD may be no greater than 40 mm, no greater than 30 mm, no greater than 20 mm, no greater than 10 mm, no greater than 5 mm, no greater than 3 mm, or no greater than other values.

Please refer to fig. 4 and 8. First, as shown in fig. 4, the plurality of leds 113 of the plurality of light bars 11 have substantially the same first pitch P1 along the height direction (the direction parallel to the y-axis) of the flexible reflector 13. The size of the first pitch P1 can be determined according to the height of the curved lamp panel and the number of the light emitting diodes 113. As shown in fig. 8, along a curved surface of the flexible reflector 13, the plurality of light emitting diodes 113 of the plurality of light bars 11 have substantially the same second pitch P2. The size of the second interval P2 can be determined according to the width of the curved lamp panel of the full-array light-emitting diode, the number of the lamp strips 11 and the size of the lamp strips 11. The difference between the first pitch P1 and the second pitch P2 can be determined according to the uniformity requirement of the backlight source. For example, the ratio between the first pitch P1 and the second pitch P2 may be no greater than 2, no greater than 1.5, no greater than 1.25, or no greater than other values.

Referring to FIG. 9, a curvature of a liquid crystal display according to some embodiments of the invention is illustrated. The illustration of fig. 9 is provided as an example and is not intended to limit the present disclosure.

In some embodiments, the liquid crystal display 1 may provide a curved display with a single curvature, but in some other embodiments, the liquid crystal display 1 may also provide a curved display with a plurality of curvatures. In an embodiment where the lcd 1 provides a single curvature curved display, the flexible reflector 13 in the curved panel 21 of the full-array led may be formed as a single curvature reflector. In addition, in the embodiment of the lcd 1 providing curved display with multiple curvatures, the flexible reflector 13 in the curved panel 21 of the full-array led can be curved to form a reflector with multiple curvatures. For example, as shown in fig. 9, the lcd 1 provides two curved displays with different curvatures corresponding to the first radius R1 and the second radius R1, respectively, and the flexible reflector 13 in the full-array led curved panel 21 can be formed as a reflector with the first curvature and the second curvature.

Referring to fig. 2, 3A, 3B and 10A, fig. 10A illustrates a Continuous thermal Conductive Adhesive Tape (Continuous thermal Adhesive Tape) according to some embodiments of the present invention. The illustration of fig. 10A is for exemplary purposes only and is not intended to limit the present claims. As shown in fig. 2, 3A, 3B and 10A, in some embodiments, the rear surfaces 11B of the plurality of light bars 11 can be attached to the rear frame 27 of the full-array led curved backlight module 91 by a continuous thermal conductive tape 25.

Referring to fig. 2, 3A, 3B and 10B, fig. 10B illustrates Bar-Shaped thermal Conductive Tapes (Bar-Shaped thermal Conductive Tapes) that are not connected to each other according to some embodiments of the present invention. The illustration in FIG. 10B is provided as an example and is not intended to limit the present disclosure. As shown in fig. 2, fig. 3A, fig. 3B and fig. 10B, in some embodiments, the rear side surfaces 11B of the light bars 11 may also be respectively attached to the rear frame 27 of the full-array led curved backlight module 91 by a plurality of strip-shaped heat conductive tapes 25 that are not connected to each other. In some embodiments, the continuous thermal tape 25 or the plurality of strips of thermal tape 25 is made of Glass Fiber Fabric (Glass Fiber Fabric). The thermal conductivity of the thermal conductive tape 25 may be determined as desired. For example, the thermal conductivity of the continuous thermal tape 25 or the plurality of strips of thermal tape 25 may be no greater than 3.5W/mK, no greater than 2.5W/mK, no greater than 1.5W/mK, or no greater than other values.

In some embodiments, the rear surfaces 11B of the plurality of light bars 11 can be fixed to the rear frame 27 of the full-array led backlight module 91 by various known fixing elements (e.g., screws).

Referring to fig. 11A and 11B, fig. 11A illustrates electrical and signal connections between a light bar and the centralized local dimming driver module and the local dimming controller module in the full-array led curved backlight module according to some embodiments of the invention, and fig. 11B illustrates electrical and signal connections between a light bar and the centralized local dimming driver module and the local dimming controller module in the full-array led curved backlight module according to some other embodiments of the invention. The illustration of FIG. 11A or FIG. 11B is for exemplary purposes only and is not intended to limit the present claims.

As shown in fig. 11A, in some embodiments, the full-array led curved backlight Module 91 further includes at least one main pcb 20, and the at least one main pcb 20 includes a Local Dimming Controller Module (Local Dimming Controller Module) 201 and a centralized Local Dimming Driver Module (Local Dimming Driver Module) 203 disposed on the at least one main pcb 20. The local dimming controller module 201 controls a plurality of driving current signals required by the plurality of dimming partition circuits of the plurality of strip-shaped pcb 111 of the plurality of light bars 11 through the centralized local dimming driver module 203, respectively and independently. In addition, the curved lamp panel 21 of the full-array led in the curved backlight module 91 further includes a plurality of connectors 117, and the plurality of connectors 117 are respectively disposed on the front side surfaces 11A of the plurality of strip-shaped printed circuit boards 111 of the plurality of light bars 11, so that the plurality of strip-shaped printed circuit boards 111 are electrically connected to the at least one main printed circuit board 20 through wires. More specifically, each connector 117 can mate with a connector 203A on at least one main pcb 20 for electrically connecting the corresponding strip pcb 111 to the cpm driver module 203 via wires. In addition, the centralized local dimming driver module 203 can be electrically connected to the local dimming controller module 201 through wires by the connector 203B and the connector 201B on the at least one main pcb 20. The centralized local dimming driver module 203 and the local dimming controller module 201 may be disposed on a plurality of main pcb 20 as shown in fig. 11A, respectively, but may also be disposed on a single main pcb 20 (not shown).

As shown in fig. 11A, in fig. 11B, the full-array led curved backlight module 91 further includes at least one main pcb 20, and the at least one main pcb 20 includes a local dimming controller module 201 and a centralized local dimming driver module 203. However, in fig. 11B, the connectors 117 of the full-array led curved backlight module 91 are respectively disposed on the rear side surfaces 11B of the strip-shaped pcbs 111 of the light bars 11, rather than the front side surfaces 11A as shown in fig. 11A.

Referring to fig. 11A, 11B, 12A and 12B, fig. 12A and 12B illustrate an arrangement, an electrical connection and a control structure of a local dimming controller module and a centralized local dimming driver module in a full-array led curved backlight module according to some embodiments of the present invention. Fig. 12A and 12B are only used as an example and are not intended to limit the present invention.

In the content shown in fig. 12A and 12B, the local Dimming controller module 201 disposed on the at least one main pcb 20 is configured to generate the divisional luminance Information (Brightness Information of Zones) according to the luminance Information (Brightness Information) and the divisional Information (Zone Information) of each image and an image synchronization signal, wherein the divisional luminance Information includes a plurality of divisional luminance values (Brightness Data of Zones) respectively corresponding to a plurality of Dimming Zones (Dimming Zones), and the plurality of Dimming Zones respectively correspond to a plurality of Dimming Zone circuits (e.g., n Dimming Zones: Z1-Zn) of each strip pcb 111 of the plurality of strip pcbs 111 of the plurality of light strips 11 (e.g., m light strips).

For example, the local dimming controller module 201 may be implemented as a Micro Controller Unit (MCU)/Microcontroller. The micro control unit is a microcomputer integrating a Central Processing Unit (CPU), a memory, a timer/counter, and various input/output interfaces on an integrated circuit chip. Initially, the mcu can read the preset partition information in its memory. Then, the micro control unit can receive an image synchronization signal and synchronously receive the brightness information of an image according to the pulse wave time sequence of the image synchronization signal. Then, the micro-control unit converts the brightness data (i.e., R, G, B three-color information) of each pixel of the image into 8-bit (0-255) gray values, and homogenizes the gray values of the brightness data of the pixels contained in the same partition according to the partition information to obtain the homogenized gray value of each partition. The gray value homogenized by each partition is a set of partition brightness data, and these gray values are called partition brightness information. In addition, the mcu transmits the brightness information of the partitions to the centralized local dimming driver 203 in real time according to the pulse timing of the video synchronization signal.

With continued reference to fig. 12A and 12B, the centralized local dimming driver module 203 disposed on the at least one main pcb 20 may include a plurality of sub-modules (e.g., m sub-modules labeled 2031-1 to 2031-m in fig. 12B), and each sub-module may include a communication module 30, a register system 32 electrically connected to the communication module 30, a multi-channel signal generator 34 electrically connected to the register system 32, and a multi-channel current driving circuit 36 electrically connected to the multi-channel signal generator 34.

The communication module 30 is used for receiving the image synchronization signal and the partition brightness information from the local dimming controller module 201, and storing the partition brightness information into the register system 32 according to the pulse timing of the image synchronization signal.

The register system 32 may include a plurality of independent registers for respectively storing a corresponding portion of the partition brightness information (i.e., a partition brightness data corresponding to a dimming partition) according to the pulse timing of the image synchronization signal. The independent registers are mapped to the channels CH1 CHn, and the channels CH1 CHn correspond to the dimming partition circuits Z1 Zn of each strip-shaped PCB 111.

The multi-channel signal generator 34 is configured to generate a plurality of current driving signals corresponding to the plurality of channels CH1 to CHn for each light bar 11 according to the partition brightness information. For example, the multi-channel signal generator 34 may be a multi-channel Pulse Width Modulation (PWM) signal generator, which converts each piece of partition brightness data into a Duty Cycle (Duty Cycle) of a PWM signal (i.e., a current driving signal) and transmits the PWM signal to a corresponding channel. If an 8-bit (8-bit) digital signal is taken as an example, the duty cycle of the PWM signal is defined as follows:

D＝G/255×100％

where D is the duty cycle and G is the divisional luminance data (expressed in gray scale).

The multi-channel current driving circuit 36 has a plurality of driving signal ports (labeled as LED-1 to LED-n) corresponding to the plurality of channels CH1 to CHn, respectively. The multi-channel current driving circuit 36 is used for controlling the driving currents of the light emitting diodes 113 corresponding to the channels CH1 to CHn respectively and independently according to the plurality of current driving signals generated by the multi-channel signal generator 34, so as to realize local dimming of the full-array backlight module.

Referring to fig. 13, electrical and signal connections between a light bar and a distributed local dimming driver module and a local dimming controller module in a full-array led curved backlight module according to some embodiments of the invention are illustrated. The illustration of fig. 13 is for exemplary purposes only and is not intended to limit the present claims.

As shown in fig. 13, in some embodiments, the full-array led curved backlight module 91 further comprises a main pcb 20, and the main pcb 20 comprises a local dimming controller module 201 disposed on the main pcb 20. In addition, the curved lamp panel 21 of the full-array led in the curved backlight module 91 further includes a plurality of connectors 117, and the plurality of connectors 117 are respectively disposed on the rear side surfaces 11B of the plurality of strip-shaped pcb's 111 of the plurality of light bars 11. The full-array led curved backlight module 91 further includes a plurality of distributed local dimming driver modules 205, and the distributed local dimming driver modules 205 are respectively disposed on the rear side surfaces 11B of the strip-shaped printed circuit boards 111 of the light bars 11. More specifically, each connector 117 is electrically connected to the connector 201B on the main pcb 20 through wires, such that the distributed local dimming driver module 205 disposed on the rear surface 11B of the strip pcb 111 of the corresponding light bar 11 is electrically connected to the local dimming controller module 201 disposed on the main pcb 20 through wires. The local dimming controller module 201 controls a plurality of driving current signals required by the plurality of dimming partition circuits of the plurality of strip-shaped printed circuit boards 111 of the plurality of light bars 11 through the plurality of distributed local dimming driver modules 205 respectively and independently.

Referring to fig. 13, 14A and 14B, fig. 14A and 14B illustrate an arrangement, electrical connection and control structure of the local dimming controller module and the distributed local dimming driver module in the full-array led curved backlight module according to some embodiments of the present invention. Fig. 14A and 14B are only used as examples and are not intended to limit the claims of the present disclosure.

In terms of function, the local dimming controller module 201 in fig. 14A is substantially the same as the local dimming controller module 201 in fig. 12A. Therefore, in the content shown in fig. 14A and 14B, the local dimming controller module 201 can also be used to generate the local brightness information according to the brightness information and the partition information of each image and an image synchronization signal, and transmit the partition brightness information to the distributed local dimming driver modules 205 (or indicated as 205-1-205-m) in real time according to the pulse timing of the image synchronization signal. For further details of the local dimming controller module 201, reference may be made to the above illustration of fig. 14A and 14B.

Functionally, the distributed local dimming driver modules 205-1 to 205-m shown in fig. 14B are substantially the same as the sub-modules 2031-1 to 2031-m included in the centralized local dimming driver module 203 shown in fig. 12B. Therefore, in the context of fig. 14A and 14B, each of the distributed local dimming driver modules 205-1-205-m may also include a communication module 30, a register system 32 electrically connected to the communication module 30, a multi-channel signal generator 34 electrically connected to the register system 32, and a multi-channel current driving circuit 36 electrically connected to the multi-channel signal generator 34. For additional details of the communication module 30, the register system 32, the multi-channel signal generator 34, and the multi-channel current driving circuit 36, reference may be made to the above examples with respect to fig. 12A and 12B.

The above embodiments are not intended to limit the present invention. Any other embodiments that can be modified, changed, adjusted, and integrated with the above-described embodiments, as long as they can be easily understood by those skilled in the art to which the present invention pertains, are intended to be covered by the claims of this document.

Claims

1. The utility model provides a full array emitting diode curved surface lamp plate, contains:

each light bar in the plurality of light bars comprises a strip-shaped printed circuit board and a plurality of light emitting diodes arranged on the front side surface of the strip-shaped printed circuit board, wherein the circuit of the strip-shaped printed circuit board of each light bar is divided into a plurality of dimming partition circuits, each dimming partition circuit is electrically connected with at least one light emitting diode so as to adjust the light emitting intensity of the at least one light emitting diode of the dimming partition circuit, and therefore the regional dimming of the full-array light emitting diode curved panel is realized; and

the flexible reflector plate is provided with a plurality of first openings corresponding to the positions of a full array of light-emitting diodes;

wherein the plurality of light bars are attached to a rear side surface of the flexible reflector sheet along a height direction of the flexible reflector sheet by an adhesive, and the plurality of light emitting diodes of the plurality of light bars are exposed from the plurality of first openings of the flexible reflector sheet towards a liquid crystal display panel; and

wherein, along a width direction of this flexible reflection piece, this rear surface of this flexible reflection piece is towards a front side surface bending of this flexible reflection piece to form a reflection curved surface of this full array emitting diode curved surface lamp plate.

2. The full-array light emitting diode curved panel of claim 1, wherein:

the flexible reflector further comprises a plurality of second openings; and

the plurality of light bars further include a plurality of optical film group supporting pins disposed on front side surfaces of the plurality of strip-shaped printed circuit boards of the plurality of light bars and exposed from the plurality of second openings of the flexible reflective sheet toward the liquid crystal display panel.

3. The full-array led cambered lamp panel of claim 2, wherein the plurality of first openings and the plurality of second openings are rectangular openings or circular openings.

4. The full-array led curved panel of claim 1, wherein the leds of the light bars are composed of one of: blue light emitting diode, white light emitting diode converted by photoluminescence material, deep violet light emitting diode, ultraviolet light emitting diode, or combination of red light emitting diode, green light emitting diode and blue light emitting diode arranged alternately.

5. The full-array led curved panel of claim 1, wherein the plurality of leds of the plurality of light bars are sub-millimeter leds.

6. The full-array led curved panel of claim 1, wherein the plurality of leds of the plurality of light bars are arranged in one column or a plurality of columns parallel to each other.

7. The full-array light emitting diode curved panel of claim 1, wherein:

along the height direction of the flexible reflector, the plurality of light emitting diodes of the plurality of light bars have substantially the same first interval; and

along a curved surface of the flexible reflector, the plurality of light emitting diodes of the plurality of light bars have substantially the same second spacing.

8. The full-array light emitting diode curved panel of claim 7, wherein a ratio between the first pitch and the second pitch is not greater than 2, not greater than 1.5, or not greater than 1.25.

9. The full-array led curved panel of claim 1, wherein each of the plurality of strip pcbs is formed of one of the following materials: epoxy resin, bismaleimide-modified triazine resin, aluminum, or polyimide.

10. The full-array led contoured lamp panel of claim 1, wherein the flexible reflector sheet has a thickness of no greater than 500 microns, no greater than 300 microns, no greater than 200 microns, or no greater than 100 microns.

11. The full-array led curved panel of claim 1, wherein a reflectivity of the flexible reflector sheet is not less than 85%, not less than 90%, or not less than 95%.

12. The full-array led curved panel of claim 1, wherein the flexible reflector sheet is formed as a reflector sheet with a single curvature or a reflector sheet with multiple curvatures.

13. The full-array led curved panel of claim 1, wherein the plurality of light bars are attached to a rear frame by a continuous thermal tape or by a plurality of non-connected strips of thermal tape.

14. The full-array led cambered lamp panel of claim 13, wherein the continuous thermal conductive tape or the plurality of strip-shaped thermal conductive tapes is made of glass fiber fabric.

15. The curved panel of claim 13, wherein the continuous thermal tape or the plurality of strips have a thermal conductivity of no greater than 3.5W/mK, no greater than 2.5W/mK, or no greater than 1.5W/mK.

16. The full-array light emitting diode curved panel of claim 1, further comprising: the plurality of connectors are respectively arranged on the front side surface or the rear side surface of the plurality of strip-shaped printed circuit boards of the plurality of light bars so that the plurality of strip-shaped printed circuit boards are electrically connected to at least one external main printed circuit board through wires, wherein a local dimming controller module and a centralized local dimming driver module are arranged on the at least one main printed circuit board, and the local dimming controller module respectively and independently controls a plurality of driving current signals required by the plurality of dimming partition circuits of the plurality of strip-shaped printed circuit boards of the plurality of light bars through the centralized local dimming driver module.

17. The full-array light emitting diode curved panel of claim 1, further comprising:

the connectors are respectively arranged on the rear side surfaces of the strip-shaped printed circuit boards of the light bars so that the strip-shaped printed circuit boards are electrically connected to an external main printed circuit board through wires, and a local dimming controller module is arranged on the main printed circuit board; and

a plurality of distributed local dimming driver modules respectively arranged on the rear side surfaces of the plurality of strip-shaped printed circuit boards of the plurality of light bars;

wherein the local dimming controller module controls a plurality of driving current signals required by the plurality of dimming partition circuits of the plurality of strip-shaped printed circuit boards of the plurality of light bars through the plurality of distributed local dimming driver modules respectively and independently, and each of the plurality of distributed local dimming driver modules comprises:

a communication module for receiving an image synchronization signal and the partition brightness information from the local dimming controller module;

a register system electrically connected to the communication module and including a plurality of independent registers for respectively storing a corresponding portion of the partition brightness information according to a pulse timing of the image synchronization signal, wherein the independent registers are mapped to a plurality of channels respectively corresponding to a plurality of dimming partition circuits of each strip-shaped printed circuit board;

a multi-channel signal generator electrically connected to the register system for generating a plurality of current driving signals corresponding to the plurality of channels according to the partition brightness information; and

a multi-channel current driving circuit electrically connected to the multi-channel signal generator for respectively and independently controlling the driving current of the light emitting diodes corresponding to the channels according to the plurality of current driving signals.

18. A full-array LED curved backlight module comprises:

the full array light emitting diode cambered lamp panel of claim 1;

an optical film set disposed facing the front surface of the flexible reflection sheet; and

and the rear frame is used for accommodating the full-array light-emitting diode curved-surface lamp panel and the optical diaphragm group.

19. The full-array led curved backlight module of claim 18, wherein:

the flexible reflector further comprises a plurality of second openings;

the plurality of light bars further comprise a plurality of optical diaphragm group supporting pins which are arranged on the front side surfaces of the plurality of strip-shaped printed circuit boards of the plurality of light bars and are exposed from the plurality of second openings of the flexible reflection sheet towards the liquid crystal display panel; and

the optical diaphragm set is disposed in contact with the plurality of optical diaphragm set support pins exposed from the plurality of second openings of the flexible reflector to form an optical distance between the flexible reflector and the optical diaphragm set.

20. The full-array led curved backlight module of claim 19, wherein the optical distance is not greater than 40 mm, not greater than 30 mm, not greater than 20 mm, not greater than 10 mm, not greater than 5 mm, or not greater than 3 mm.

21. The full-array led curved backlight module of claim 18, wherein the optical film assembly comprises a quantum dot enhancement film, a brightness enhancement film, or a diffusion film.

22. The full array led curved backlight module of claim 18, further comprising:

at least one main printed circuit board; and

a plurality of connectors respectively arranged on the front side surface or the rear side surface of the plurality of strip-shaped printed circuit boards of the plurality of light bars so that the plurality of strip-shaped printed circuit boards are electrically connected to the at least one main printed circuit board through wires;

wherein the at least one main printed circuit board comprises:

a local dimming controller module, which is arranged on the at least one main printed circuit board and generates partition brightness information according to the brightness information and partition information of each image and an image synchronization signal, wherein the partition brightness information comprises a plurality of partition brightness data respectively corresponding to a plurality of dimming partitions, and the plurality of dimming partitions respectively correspond to a plurality of dimming partition circuits of each strip-shaped printed circuit board in the plurality of strip-shaped printed circuit boards of the plurality of light bars; and

a centralized local dimming driver module disposed on the at least one main printed circuit board, wherein the centralized local dimming driver module comprises a plurality of sub-modules, and each sub-module comprises:

a register system electrically connected to the communication module and including a plurality of independent registers, wherein the independent registers are used for respectively storing a corresponding part of the partitioned brightness information according to a pulse timing sequence of the image synchronization signal, the independent registers are mapped to a plurality of channels, and the channels correspond to a plurality of dimming partition circuits of a corresponding strip-shaped printed circuit board respectively;

23. The full-array led curved backlight module of claim 18, further comprising:

a main printed circuit board; and

a plurality of connectors respectively arranged on the rear side surfaces of the plurality of strip-shaped printed circuit boards of the plurality of light bars so that the plurality of strip-shaped printed circuit boards are electrically connected to the main printed circuit board through wires;

wherein, this main printed circuit board contains:

a local dimming controller module disposed on the main printed circuit board and configured to generate divisional luminance information according to luminance information and divisional information of each image and an image synchronization signal, wherein the divisional luminance information includes a plurality of divisional luminance data respectively corresponding to a plurality of dimming divisions corresponding to the plurality of dimming division circuits of the plurality of strip-shaped printed circuit boards of the plurality of light bars; and

wherein, the plurality of strip-shaped printed circuit boards of the plurality of light bars further comprise a plurality of distributed local dimming driver modules respectively arranged on the rear side surfaces of the plurality of strip-shaped printed circuit boards of the plurality of light bars, and each distributed local dimming driver module of the plurality of distributed local dimming driver modules further comprises:

a register system electrically connected to the communication module and including a plurality of independent registers, wherein the independent registers are used for respectively storing a corresponding part of the partition brightness information according to a pulse timing sequence of the image synchronization signal, the independent registers are respectively mapped to a plurality of channels, and the channels respectively correspond to a plurality of dimming partition circuits of a corresponding strip-shaped printed circuit board;

a multi-channel current driving circuit electrically connected to the multi-channel signal generator for respectively and independently controlling the driving currents of the light emitting diodes corresponding to the channels according to the plurality of current driving signals.

24. A curved-surface liquid crystal display, comprising:

a curved liquid crystal display panel;

the full-array led curved backlight module according to claim 18, for providing a light source required by the curved lcd panel; and

and the front frame is used for accommodating the curved liquid crystal display panel and is combined with the rear frame of the full-array light-emitting diode curved backlight module.