WO2017045381A1 - 一种拼接屏 - Google Patents

一种拼接屏 Download PDF

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Publication number
WO2017045381A1
WO2017045381A1 PCT/CN2016/076047 CN2016076047W WO2017045381A1 WO 2017045381 A1 WO2017045381 A1 WO 2017045381A1 CN 2016076047 W CN2016076047 W CN 2016076047W WO 2017045381 A1 WO2017045381 A1 WO 2017045381A1
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WO
WIPO (PCT)
Prior art keywords
light source
light
fixing plate
splicing screen
source fixing
Prior art date
Application number
PCT/CN2016/076047
Other languages
English (en)
French (fr)
Inventor
杨凡
林涉
王鑫
Original Assignee
京东方科技集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/327,766 priority Critical patent/US10203535B2/en
Publication of WO2017045381A1 publication Critical patent/WO2017045381A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13336—Combining plural substrates to produce large-area displays, e.g. tiled displays
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G1/00—Mirrors; Picture frames or the like, e.g. provided with heating, lighting or ventilating means
    • A47G1/06—Picture frames
    • A47G1/0616—Ornamental frames, e.g. with illumination, speakers or decorative features
    • A47G1/0622—Ornamental frames, e.g. with illumination, speakers or decorative features with illumination
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/0015—Fastening arrangements intended to retain light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/05—Optical design plane
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a splicing screen.
  • splicing screens With the rapid development of display technology, splicing screens came into being. Because of its large scene display effect, it can bring users an immersive visual experience. Therefore, splicing screens are widely used in exhibitions.
  • the splicing screen includes a casing 1', a backlight module 2', and a plurality of display modules 3' spliced to each other.
  • the box body 1' is located on the periphery of the plurality of display modules 3' for fixing a plurality of display modules 3', and the exhibition object 4' is placed on the bottom of the box;
  • the backlight module 2' is located on the four side walls of the box body 1' Used to provide light for all display modules 3'.
  • the backlight module 2' includes a light source 21' and a diffusion plate 22' which are disposed on the four side walls of the casing 1'. The light from the light source 21' passes through the diffuser 22' and is radiated into the entire casing 1' to provide light to the entire splicing screen.
  • the inventor of the present application has found that the splicing screen having the above structure is in use, because the central area of the splicing screen is far from the backlight module, so that the brightness of the central area of the splicing screen is low, thereby causing the brightness of the splicing screen. Poor uniformity.
  • the uniformity of the brightness is the ratio obtained by dividing the lowest brightness by the highest brightness, and the smaller the ratio, the worse the uniformity of the brightness of the splicing screen.
  • the present invention provides a splicing screen, which includes a box body, a backlight module, and a plurality of display modules spliced with each other, the box body including four side walls and a box bottom, the plurality of The display module is fixed to the box body opposite to the bottom of the box, wherein the backlight module comprises a plurality of light boards disposed on four side walls, each of the light boards comprising: a bottom plate a light source fixing plate, and a light source fixed on the light source fixing plate, wherein the light source fixing plate is connected to the first side of the bottom plate adjacent to the display module, and forms an angle with the bottom plate .
  • the light source is fixed on the inclined light source fixing plate, and the light source fixing plate forms an angle with the bottom plate, thereby causing the light emitted by the light source. It can be irradiated to the central area of the bottom of the box and reflected, which increases the amount of light reflected into the human eye in the central area, thereby improving the brightness of the central area of the splicing screen and achieving the purpose of improving the uniformity of the brightness of the splicing screen.
  • FIG. 1 is a structural diagram of a splicing screen in the prior art
  • Figure 2 is a cross-sectional view of Figure 1 taken along the line A-A';
  • Figure 3 is a block diagram of a splicing screen in accordance with one embodiment of the present invention.
  • Figure 4 is a structural view of a light panel in accordance with one embodiment of the present invention.
  • Figure 5 is an enlarged view of a region B in Figure 4.
  • Figure 6 is a cross-sectional view of Figure 3 taken along the line C-C';
  • Figure 7 is a cross-sectional view of Figure 3 taken along the line E-E'.
  • the embodiment of the invention provides a splicing screen, as shown in FIG.
  • the splicing screen comprises a box body 1, a backlight module and a plurality of display modules 2 spliced to each other.
  • the box body 1 includes four side walls and a box bottom.
  • the plurality of display modules 2 are fixed to the box body 1 opposite to the box bottom, and the backlight module comprises four sides arranged in the circumferential direction of the box body 1 in sequence.
  • the light source fixing plate 32 is located on a side close to the display module 2, and is connected to the first side of the bottom plate 31 adjacent to the display module 2, and And forming an angle with the bottom plate 31.
  • the shape of the bottom plate 31 is a rectangle.
  • the display module 2 may be a liquid crystal panel.
  • each of the light panels 3 in the direction in which the light source fixing plates 32 extend may be the same as the length of the corresponding side walls or may be smaller than the length of the corresponding side walls.
  • the length of each of the lamp panels 3 in the direction in which the light source fixing plates 32 extend is the same as the length of the corresponding side walls, only one light panel 3 needs to be provided on each of the side walls.
  • each of the lamp panels 3 has a length in the extending direction of the light source fixing plate 32 smaller than the length of its corresponding side wall, a plurality of light panels 3 are disposed on each of the side walls.
  • the lamp panel 3 has better flexibility, since the lamp panel 3 can be applied to splicing screens having different sizes only by adjusting the number of the lamp panels 3.
  • the light panels 3 have the same size, they do not need to be separately designed as needed, and are easy to transport.
  • the backlight module when the splicing screen includes nine 55-inch display modules 2 that are spliced together, the backlight module includes 18 light panels 3, wherein the longer two sides of the cabinet 1 Six light panels 3 are respectively arranged on the wall, and three light panels 3 are respectively arranged on the shorter two side walls of the casing 1.
  • the length of each of the light plates 3 located on the longer two side walls of the casing 1 in the extending direction of the light source fixing plate 32 is about 1/6 of the length of the casing 1, and is located in the casing 1
  • the length of each of the short two side walls 3 in the direction in which the light source fixing plate 32 extends is about 1/3 of the width of the casing 1.
  • the above-mentioned light board 3 When the above-mentioned light board 3 is applied to a splicing screen of other sizes, for example, when the above-mentioned light board 3 is applied to a splicing screen including four 55-inch display modules 2 which are spliced together, only the long length of the box 1 is required.
  • Four of the above-mentioned lamp panels 3 are respectively disposed on the two side walls, and two of the above-mentioned lamp panels 3 are respectively disposed on the shorter two side walls of the casing 1.
  • the light board 3 is detachably attached to the side wall of the cabinet 1.
  • the bottom plate 31 is provided with a plurality of screw holes, and the detachable connection of the single lamp plate 3 and the side walls can be realized by the screw holes on the bottom plate 31.
  • the light panel 3 may include a plurality of connection mechanisms 33 on both sides of the bottom plate 31.
  • the connecting mechanism 33 may be a connecting piece, and each connecting piece is provided with at least one screw hole, and the screw holes on the connecting pieces of the adjacent two light boards 3 are connected by bolts to realize the connection between the adjacent two light boards 3 Detachable connection.
  • the connecting mechanism 33 may be a slot through which the slots of the adjacent two light panels 3 are connected by a pin to achieve a detachable connection between two adjacent light panels 3.
  • Other connections are also conceivable by those skilled in the art to achieve a detachable connection between two adjacent light panels 3.
  • the exhibition object 4 is placed on the bottom of the box, and the exhibition object 4 is, for example, a sand table, a model map, or the like.
  • Display module 2 during the exhibition In a transparent state, the light emitted by the light source is irradiated onto the exhibition object 4, and is reflected by the exhibition object 4 out of the display module 2, thereby reaching the human eye.
  • the display module 2 can also display the introduction information of the exhibition object 4 and the like at an appropriate position, so that the visitor can understand the exhibition object 4.
  • the light source is fixed on the inclined light source fixing plate, and the light source fixing plate forms an angle with the bottom plate, so that the light emitted by the light source can be irradiated to the central area of the bottom of the box and
  • the reflection increases the amount of light reflected into the human eye in the central region, thereby improving the brightness of the central region of the splicing screen, and achieving the purpose of improving the uniformity of the brightness of the splicing screen.
  • the diffusing plate is not included in the splicing screen provided by the embodiment of the present invention, not only the width of the non-display area of the splicing screen can be reduced, but also the splicing screen is more concise and beautiful, and the diffusion in the prior art can be avoided.
  • Many technical problems caused by the board For example, when a whole diffusing plate is used on one side wall, the supporting of the diffusing plate is high, the middle is prone to collapse or bulge, the technical problem of the diffusion plate is difficult to transport and install; and the splicing is performed on one side wall. When multiple diffusers are used, shadows are generated at the seams, which causes technical problems in which the visual effect of the splicing screen is lowered.
  • the light source may include a plurality of chip on board light emitting diodes (COB LEDs) packaged in a chip package mode, and the plurality of COB LEDs are sequentially arranged on the light source fixing plate 32 along the extending direction of the sidewalls. Since the chip of COB LED has good heat dissipation, high light efficiency and short production cycle, when COB LED is used as the light source, not only the brightness of the light source is high, the brightness can be increased, and the light source has good heat dissipation performance. At the same time, the cost of the light source can be made lower.
  • a plurality of COB LEDs fixed on each of the light source fixing plates 32 are connected to each other by a crimp connection.
  • the number of COB LEDs fixed on each light source fixing plate should be determined by many factors such as the brightness of the COB LED, the brightness required by the splicing screen, and the transmittance of the display module.
  • the number of COB LEDs fixed on each of the light source fixing plates 32 may be 20 to 24, preferably 20.
  • the number of COB LEDs fixed on the light source fixing plate 32 in each of the light panels 3 may be the same, or may be adjusted according to the position of the light board 3 to further improve the uniformity of the brightness of the splicing screen.
  • the splicing screen includes nine 55-inch display modules that are spliced together, and the nine display modules are respectively labeled as display modules No. 1 to No. 9. Adjacent to the display modules 1, 3, 7, and 9 are the two sides of the cabinet.
  • Wall, and adjacent to the display modules 2, 4, 6, and 8 are only one side wall of the box, so if the number of COB LEDs fixed on the light source fixing plate 32 of each of the light boards 3 is the same, Will make the position of the display module 2, 4, 6, and 8 darker, the brightness of the display module position of 2, 4, 6, and 8 and the brightness of the display module position of 1, 3, 7, and 9. The difference between the two is not conducive to improving the uniformity of the brightness of the splicing screen.
  • the number of COB LEDs fixed on the light source fixing plate 32 in the light board 3 corresponding to the display modules 2, 4, 6, and 8 can be relatively large, and corresponds to the display modules 1, 3, 7, and 9.
  • the number of COB LEDs fixed on the light source fixing plate 32 in the light board 3 is small to reduce the brightness at the position of the display module 2, 4, 6, and 8 and the display modes of the 1, 3, 7, and 9 The difference between the brightness at the group position to further increase the uniformity of the brightness of the splicing screen.
  • the power of the COB LEDs fixed on the light source fixing plate 32 in each of the light plates 3 may be the same or different.
  • the structure of the backlight module is relatively simple; when the power of the COB LEDs fixed on the light source fixing plate 32 in each of the light plates 3 is not At the same time, the structure of the backlight module is more complicated, but the brightness uniformity of the splicing screen can be further improved. Specifically, for the splicing screen shown in FIG.
  • the power of the COB LED fixed on the light source fixing plate 32 in the light board 3 corresponding to the display modules 2, 4, 6, and 8 can be made larger, and The power of the COB LED fixed on the light source fixing plate 32 in the lamp board 3 corresponding to the 1, 3, 7 and 9 display modules is small to reduce the brightness at the position of the display module 2, 4, 6, and 8
  • the difference between the brightness at the position of the display module of 1, 3, 7, and 9 is used to further improve the uniformity of the brightness of the splicing screen.
  • the angle formed between the light source fixing plates and the bottom plates among the plurality of light plates disposed on the four side walls may be the same.
  • the light emitted by each of the COB LEDs on the light source fixing plate disposed in each of the side walls can be irradiated to the edge of the bottom of the box to a position L/2 from the side wall, wherein L It is the length of the case 1 so that all the light emitted by the COB LED can cover the entire bottom of the case.
  • L It is the length of the case 1 so that all the light emitted by the COB LED can cover the entire bottom of the case.
  • the angle a1 of the angle formed between the light source fixing plate 32 and the bottom plate 31 is determined in accordance with the length L of the casing 1, the thickness D, and the light-emitting angle ⁇ of the COB LED. Specifically, when the light-emitting angle ⁇ of the COB LED is fixed, the longer the length L of the casing 1 is, the larger the angle a1 of the angle formed between the light source fixing plate 32 and the bottom plate 31 is, and the smaller the thickness D of the casing 1 is. The angle a1 of the angle formed between the light source fixing plate 32 and the bottom plate 31 is larger.
  • the length L of the casing 1 is 3.6 to 3.8 m (for example, 3.6 m), and the width of the casing 1 is W is 2.0 to 2.2 m (for example, 2.1 m), and the thickness D of the casing 1 is 0.55 to 0.75 m (for example, 0.55 m), and the structure of the light source fixing plate 32 is described in detail.
  • the length of each of the light panels 3 in the direction in which the light source fixing plates 32 extend is 535 to 560 mm, preferably 535 mm, and the width of each of the light panels 3 in the direction perpendicular to the direction in which the light source fixing plates 32 extend is 550 to 750 mm.
  • the length and width of the lamp panel 3 are not limited to the above values.
  • the length of the light board 3 along the extending direction of the light source fixing plate 32 can be set according to the width of the display module 2, so as to minimize the influence of the splicing between the light boards 3 on the display effect of the splicing screen. Illustratively, as shown in FIG.
  • the splicing screen when the splicing screen includes nine display modules 2 spliced to each other in a 3*3 manner, and each of the display modules 2 has a size of 1150 mm*635 mm, the splicing screen may include 18 Light board 3 of the above size.
  • the width of the lamp panel 3 in the direction perpendicular to the direction in which the light source fixing plate 32 extends may be equal to or close to the thickness D of the casing 1.
  • the light source fixing plate 32 has a width of 20 to 26 mm.
  • the angle a1 formed between the light source fixing plate 32 and the bottom plate 31 is 108° to 113°, preferably It is 110° so that the light from all COB LEDs can cover the entire bottom of the box.
  • the angle formed between the light source fixing plate 32 and the bottom plate 31 in the lamp panel 3 disposed on the longer two side walls is smaller than that set at a shorter length.
  • the light source fixing plate 32 in the lamp plate 3 on the two side walls forms an angle with the bottom plate 31 so that the light emitted by all the COB LEDs can cover the entire bottom of the case.
  • the light emitted by the COBLED on the light source fixing plate 32 of the light board 3 disposed on the longer two side walls can be irradiated to the edge of the bottom of the box to a position of W/2 from the side wall, wherein , W is the width of the box 1.
  • the angle a2 of the angle formed between the light source fixing plate 32 and the bottom plate 31 is determined in accordance with the width W of the casing 1, the thickness D, and the illuminating angle ⁇ of the COB LED. Specifically, when the light-emitting angle ⁇ of the COB LED is fixed, the larger the width W of the casing 1 is, the larger the angle a2 of the angle formed between the light source fixing plate 32 and the bottom plate 31 is, and the smaller the thickness D of the casing 1 is. The angle a2 of the angle formed between the light source fixing plate 32 and the bottom plate 31 is larger.
  • the light emitted by the COBLED on the light source fixing plate 32 of the light board 3 disposed on the shorter two side walls can be irradiated to the edge of the bottom of the box to a position of the side wall L/2, wherein L is the cabinet 1 length.
  • the angle a1 of the angle formed between the light source fixing plate 32 and the bottom plate 31 is determined in accordance with the length L of the casing 1, the thickness D, and the illuminating angle ⁇ of the COB LED.
  • the length L of the casing 1 is The larger the angle a1 of the angle formed between the light source fixing plate 32 and the bottom plate 31, the smaller the thickness D of the casing 1, and the larger the angle formed between the light source fixing plate 32 and the bottom plate 31.
  • the light board 3 may further include a shielding member 34 extending from one side of the light source fixing plate 32 away from the bottom plate 31, and the shielding member 34 and the light source fixing plate 32 form a bent structure.
  • the shielding member 34 can effectively prevent excessive light from being emitted from the periphery of the splicing screen, thereby effectively preventing glare phenomenon around the splicing screen, and is beneficial to improving the display effect of the splicing screen.
  • the cross-sectional shape of the bent structure formed by the shutter 34 and the light source fixing plate 32 may be triangular or trapezoidal.
  • the utilization of the light emitted by the light source can be improved in the following manner:
  • the light source fixing plate 32 is covered with a reflective layer to reflect the light incident on the light source fixing plate 32 to be reused;
  • the shielding member 34 is covered with a reflective layer for reflecting the light blocked by the shielding member 34 to be reused.
  • the bottom plate 31 is covered with a reflective layer to improve the reflection effect of the bottom plate on the light;
  • the plate 3 further includes a reflecting plate 35 connected to the second side of the bottom plate 31 away from the display module 2, and the second side is disposed opposite to the first side, and the reflecting plate 35 can reflect the light directed thereto and make It is re-used.
  • the bottom plate 31, the light source fixing plate 32, the connecting mechanism 33, the shielding member 34 and the reflecting plate 35 of the light board 3 are made of aluminum, so that the heat dissipation performance of the light board 3 is good, and the performance of the light source is stabilized and maintained.
  • the performance of the backlight module is stable.
  • the splicing screen in the prior art and the splicing screen in the embodiment of the present invention is the same in that the splicing screens comprise nine 55-inch display modules that are spliced together.
  • the difference between the prior art and the splicing screen in the embodiment of the present invention is that, as shown in FIG. 1 and FIG. 2, the backlight module 2 ′ in the splicing screen of the prior art includes the LED light source 21 ′ and the diffusion plate 22 .
  • the backlight module of the splicing screen in the embodiment of the present invention includes 18 light boards 3, wherein the two longer side walls are respectively provided with six light boards 3, the shorter two 3 light plates 3 are respectively disposed on the side walls, as shown in FIG. 4 and FIG.
  • the angle formed between the light source fixing plate 32 and the bottom plate 31 on each of the light plates 3 is 110°, and the light source is COB LED, 20 COB LEDs are fixed on the light source fixing plate 32 of each light board 3.
  • the parameters of the COB LED are as follows: Part Number: MC-13BT-930-H-0305-C; correlated color temperature (CCT) : 9300K; luminous flux (Flux): 320lm; energy efficiency level (Eff): 118lm / W; voltage: 9V; current: 300mA.
  • the target performance of the splicing screen in the prior art and the splicing screen in the embodiment of the present invention is: the power consumption of the light source is 1202 W, and the brightness of the central area is 100 nit.
  • the test results show that the splicing screen of the prior art, the power consumption of the LED light source 21' is as high as 1280 W, and the brightness of the central area is 70 nit.
  • the power consumption of the COB LED is only 1162.2 W, the central area.
  • the brightness is 100.4 nit.
  • the power consumption of the splicing screen in the prior art is high, and the center brightness is not up to standard, and the splicing screen in the embodiment of the present invention can meet the brightness requirement of the central area in the case of low power consumption.

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  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种拼接屏，该拼接屏包括箱体（1）、背光模组和相互拼接的多个显示模组（2），所述箱体（1）包括四个侧壁和一个箱底，所述多个显示模组（2）与所述箱底相对地固定于所述箱体（1）上，所述背光模组包括设置于四个侧壁上的多个灯板（3），每个所述灯板（3）包括：底板（31），光源固定板（32），以及固定于所述光源固定板（32）上的光源，其中所述光源固定板（32）与所述底板（31）的靠近所述显示模组（2）的第一边连接，并且与所述底板（31）之间形成夹角。

Description

一种拼接屏 技术领域
本发明涉及显示技术领域，尤其涉及一种拼接屏。
背景技术
随着显示技术的高速发展，拼接屏应运而生。由于其具有大场景的显示效果，能够为用户带来身临其境的视觉体验，因此，拼接屏被广泛应用于展览场合中。
具体地，如图1和图2所示，拼接屏包括箱体1’、背光模组2’和相互拼接的多个显示模组3’。箱体1’位于多个显示模组3’外围，用于固定多个显示模组3’，展览物体4’放置于箱底上；背光模组2’位于箱体1’的四个侧壁上，用于为所有显示模组3’提供光线。背光模组2’包括设置于箱体1’的四个侧壁上的光源21’和扩散板22’。光源21’发出的光线经过扩散板22’，照射至整个箱体1’内，进而为整个拼接屏提供光线。
本申请的发明人发现，具有上述结构的拼接屏在使用过程中，由于拼接屏的中心区域距离背光模组较远，从而使得拼接屏的中心区域的亮度较低，进而导致拼接屏的亮度的均匀度差。亮度的均匀度为最低亮度除以最高亮度所得的比值，该比值越小，拼接屏的亮度的均匀度越差。
发明内容
本发明的目的在于提供一种拼接屏，用于提高拼接屏的亮度的均匀度。
为达到上述目的，本发明提供一种拼接屏，所述拼接屏包括箱体、背光模组和相互拼接的多个显示模组，所述箱体包括四个侧壁和一个箱底，所述多个显示模组与所述箱底相对地固定于所述箱体上，其特征在于，所述背光模组包括设置于四个侧壁上的多个灯板，每个所述灯板包括：底板，光源固定板，以及固定于所述光源固定板上的光源，其中所述光源固定板与所述底板的靠近所述显示模组的第一边连接，并且与所述底板之间形成夹角。
由于在本发明提供的拼接屏中，光源固定于倾斜的光源固定板上，且该光源固定板与底板之间形成夹角，从而使得上述光源发出的光线 能够照射到箱底的中心区域并反射，提高了中心区域反射入人眼的光线的量，进而能够提高拼接屏的中心区域的亮度，达到提高拼接屏的亮度的均匀度的目的。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍。显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为现有技术中的拼接屏的结构图；
图2为图1沿A-A’方向的截面图；
图3为根据本发明的一个实施例的拼接屏的结构图；
图4为根据本发明的一个实施例的灯板的结构图；
图5为图4中区域B的放大图；
图6为图3沿C-C’方向的截面图；
图7为图3沿E-E’方向的截面图。
附图标记说明：
1-箱体；2-显示模组；3-灯板；31-底板；32-光源固定板；33-连接机构；34-遮挡件；35-反射板；4-展览物体。
具体实施方式
下面将结合附图，对本发明实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明的实施例，本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例提供了一种拼接屏，如图3所示。该拼接屏包括箱体1、背光模组和相互拼接的多个显示模组2。箱体1包括四个侧壁和一个箱底，多个显示模组2与所述箱底相对地固定于所述箱体1上，背光模组包括沿箱体1的周向依次设置于四个侧壁上的多个灯板3。如图4和图5所示，每个灯板3包括：底板31，光源固定板32，以及固定于所述光源固定板32上的光源。所述光源固定板32位于靠近显示模组2的一侧，与所述底板31的靠近所述显示模组2的第一边连接，并 且与所述底板31之间形成夹角。示例性地，底板31的形状为矩形。示例性地，上述显示模组2可以为液晶面板。
每个灯板3沿光源固定板32延伸方向上的长度可以与其对应的侧壁的长度相同也可以小于其对应的侧壁的长度。当每个灯板3沿光源固定板32延伸方向上的长度与其对应的侧壁的长度相同时，每个侧壁上只需要设置一个灯板3即可。可替换地，当每个灯板3沿光源固定板32延伸方向上的长度小于其对应的侧壁的长度时，每个侧壁上设置有多个灯板3。这样，灯板3具有较好的灵活性，因为只需要对灯板3的个数进行调节，就可将上述灯板3应用于具有不同尺寸的拼接屏中。而且，由于灯板3具有相同的尺寸，而无需根据需要单独设计，并且容易运输。
示例性地，如图3所示，当拼接屏包括相互拼接的9个55寸的显示模组2时，背光模组包括18个灯板3，其中，箱体1的较长的两个侧壁上分别设置有六个灯板3，在箱体1的较短的两个侧壁上分别设置有三个灯板3。此时，位于箱体1的较长的两个侧壁上的每个灯板3沿光源固定板32延伸方向上的长度约为箱体1的长度的1/6，位于箱体1的较短的两个侧壁上的每个灯板3沿光源固定板32延伸方向上的长度约为箱体1的宽度的1/3。当将上述灯板3应用于其他尺寸的拼接屏时，例如将上述灯板3应用于包括相互拼接的4个55寸的显示模组2的拼接屏时，只需要在箱体1的较长的两个侧壁上分别设置四个上述灯板3，在箱体1的较短的两个侧壁上分别设置两个上述灯板3。
灯板3可拆卸地连接于箱体1的侧壁上。示例性地，如图4所示，底板31上设置有多个螺孔，通过底板31上的螺孔可以实现单个灯板3与侧壁的可拆卸连接。灯板3可以包括位于底板31的两个侧边上的多个连接机构33。示例性地，连接机构33可以是连接片，每个连接片上设置有至少一个螺孔，通过螺栓连接相邻两个灯板3的连接片上的螺孔，实现相邻两个灯板3之间的可拆卸连接。可替换地，连接机构33可以是插槽，通过销钉连接相邻两个灯板3的插槽，实现相邻两个灯板3之间的可拆卸连接。本领域技术人员也可以想到其他连接方式来实现相邻两个灯板3之间的可拆卸连接。
当拼接屏应用于展览场合中时，如图3所示，展览物体4放置在箱底上，展览物体4例如沙盘、模型图等。在展览过程中，显示模组2 呈透明状态，光源发出的光线照射至展览物体4上，被展览物体4反射出显示模组2，进而到达人眼。在展览过程中，显示模组2也可以在适当位置处显示展览物体4的介绍信息等内容，以便于参观者了解展览物体4。
由于在本发明实施例提供的拼接屏中，光源固定于倾斜的光源固定板上，且该光源固定板与底板之间形成夹角，从而使得上述光源发出的光线能够照射到箱底的中心区域并反射，提高了中心区域反射入人眼的光线的量，进而能够提高拼接屏的中心区域的亮度，达到提高拼接屏的亮度的均匀度的目的。
此外，由于在本发明实施例提供的拼接屏中不包括扩散板，因此，不仅能够减小拼接屏的非显示区域的宽度，使拼接屏更简洁美观，还能够避免现有技术中由于使用扩散板而导致的诸多技术问题。例如，在一个侧壁上采用一整张扩散板时，导致扩散板的支撑难度高，中间容易出现塌陷或凸出，扩散板运输安装难度高的技术问题；以及在一个侧壁上采用相互拼接的多个扩散板时，在拼缝处会产生阴影，导致拼接屏的视觉效果下降的技术问题。
光源可以包括多个采用板上芯片封装模式封装的发光二极管(Chip On Board Light Emitting Diode，COB LED)，多个COB LED在光源固定板32上沿侧壁的延伸方向依次排列。由于COB LED的芯片散热好，光效高，且制作周期短，因此，采用COB LED作为光源时，不仅可以使得光源的亮度高、亮度可提升范围大，还能使得光源具有很好的散热性能，同时还能使得光源的成本较低。示例性地，每个光源固定板32上固定的多个COB LED之间采用压线连接的方式相互连接。每个光源固定板上固定的COB LED的个数应该由COB LED的亮度、拼接屏所需求的亮度及显示模组的透过率等多个因素决定。示例性地，每个光源固定板32上固定的COB LED的个数可以为20～24个，优选为20个。
进一步地，每个灯板3中的光源固定板32上固定的COB LED的个数可以相同，也可以根据该灯板3所在位置进行相应调节，以进一步提高拼接屏的亮度的均匀度。示例性地，如图3所示，拼接屏包括相互拼接的9个55寸的显示模组，上述9个显示模组分别标号为1号～9号显示模组。由于与1、3、7、9号显示模组相邻的是箱体的两个侧 壁，而与2、4、6、8号显示模组相邻的仅是箱体的一个侧壁，因此若每个灯板3的光源固定板32上固定的COB LED的个数相同，则会使得2、4、6、8号显示模组的位置处较暗，2、4、6、8号显示模组位置处的亮度与1、3、7、9号显示模组位置处的亮度之间的差异较大，不利于提高拼接屏的亮度的均匀度。可以通过使与2、4、6、8号显示模组对应的灯板3中的光源固定板32上固定的COB LED的个数较多，与1、3、7、9号显示模组对应的灯板3中的光源固定板32上固定的COB LED的个数较少，来减小2、4、6、8号显示模组位置处的亮度与1、3、7、9号显示模组位置处的亮度之间的差异，以进一步提高拼接屏的亮度的均匀度。
类似地，每个灯板3中的光源固定板32上固定的COB LED的功率可以相同也可以不同。当每个灯板3中的光源固定板32上固定的COB LED的功率相同时，背光模组的结构较简单；当每个灯板3中的光源固定板32上固定的COB LED的功率不同时，背光模组的结构较复杂，但能够进一步提高拼接屏的亮度的均匀度。具体地，对于如图3所示的拼接屏，可以通过使与2、4、6、8号显示模组对应的灯板3中的光源固定板32上固定的COB LED的功率较大，与1、3、7、9号显示模组对应的灯板3中的光源固定板32上固定的COB LED的功率较小，来减小2、4、6、8号显示模组位置处的亮度与1、3、7、9号显示模组位置处的亮度之间的差异，以进一步提高拼接屏的亮度的均匀度。
当箱体1的长度和宽度相同时，设置于四个侧壁上的多个灯板中的光源固定板与底板之间形成的夹角的角度可以相同。如图6所示，设置于每个侧壁上的灯板中的光源固定板上的每个COB LED发出的光线能照射至箱底的边缘到距离侧壁L/2的位置处，其中，L为箱体1的长度，从而以使得所有COB LED发出的光线能够覆盖整个箱底。如图6所示，光源固定板32与底板31之间形成的夹角的角度a1的大小是根据箱体1的长度L、厚度D、COB LED的发光角θ综合确定的。具体地，当COB LED的发光角θ固定时，箱体1的长度L越大，光源固定板32与底板31之间形成的夹角的角度a1越大，箱体1的厚度D越小，光源固定板32与底板31之间形成的夹角的角度a1越大。
下面以箱体1的长度L为3.6～3.8m(例如3.6m)，箱体1的宽度 W为2.0～2.2m(例如2.1m)，箱体1的厚度D为0.55～0.75m(例如0.55m)为例，对其中的光源固定板32的结构进行详细描述。
示例性地，每个灯板3沿光源固定板32延伸方向上的长度为535～560mm，优选为535mm，且每个灯板3沿垂直于光源固定板32延伸方向上的宽度为550～750mm。需要说明的是，灯板3的长度和宽度不局限于以上数值。灯板3沿光源固定板32延伸方向上的长度可以根据显示模组2的宽度进行设定，以尽量使得灯板3之间的拼接对拼接屏的显示效果的影响最小。示例性地，如图3所示，当拼接屏包括以3*3方式相互拼接的9个显示模组2，每个显示模组2的尺寸为1150mm*635mm时，拼接屏可以包括18个具有上述尺寸的灯板3。灯板3沿垂直于光源固定板32延伸方向上的宽度可以与箱体1的厚度D相等或相近。
示例性地，光源固定板32的宽度为20～26mm。
示例性地，如图3所示，当COB LED的发光角θ为-60°～60°时，光源固定板32与底板31之间形成的夹角的角度a1为108°～113°，优选为110°，以使得所有COB LED发出的光线能够覆盖整个箱底。
可替换地，当箱体1的长度和宽度不同时，设置于较长的两个侧壁上的灯板3中的光源固定板32与底板31之间形成的夹角小于设置于较短的两个侧壁上的灯板3中的光源固定板32与底板31之间形成的夹角，以使得所有COB LED发出的光线能够覆盖整个箱底。如图7所示，设置于较长的两个侧壁上的灯板3中的光源固定板32上的COBLED发出的光线能照射至箱底的边缘到距离侧壁W/2的位置处，其中，W为箱体1的宽度。光源固定板32与底板31之间形成的夹角的角度a2的大小是根据箱体1的宽度W、厚度D、COB LED的发光角θ综合确定的。具体地，当COB LED的发光角θ固定时，箱体1的宽度W越大，光源固定板32与底板31之间形成的夹角的角度a2越大，箱体1的厚度D越小，光源固定板32与底板31之间形成的夹角的角度a2越大。设置于较短的两个侧壁上的灯板3中的光源固定板32上的COBLED发出的光线能照射至箱底的边缘到距离侧壁L/2的位置处，其中，L为箱体1的长度。光源固定板32与底板31之间形成的夹角的角度a1的大小是根据箱体1的长度L、厚度D、COB LED的发光角θ综合确定的。具体地，当COB LED的发光角θ固定时，箱体1的长度L越 大，光源固定板32与底板31之间形成的夹角的角度a1越大，箱体1的厚度D越小，光源固定板32与底板31之间形成的夹角的角度越大。
如图4和图5所示，灯板3还可以包括从光源固定板32远离底板31的一边延伸出的遮挡件34，遮挡件34与光源固定板32形成弯折结构。遮挡件34能够有效防止过多的光线从拼接屏周边射出，进而能够有效防止拼接屏周边出现眩光现象，有利于提高拼接屏的显示效果。示例性地，遮挡件34与光源固定板32形成的弯折结构的截面形状可以为三角形或者梯形。
此外，还可以通过以下方式提高光源发出的光线的利用率：方式一，光源固定板32上覆盖有反射层，以便将射向光源固定板32上的光线反射，使其重新被利用；方式二，遮挡件34上覆盖有反射层，以便将遮挡件34遮挡的光线反射，使其重新被利用；方式三，底板31上覆盖有反射层，以便提高底板对光线的反射效果；方式四，灯板3还包括反射板35，反射板35与底板31的远离显示模组2的第二边连接，第二边与第一边相对设置，反射板35能够将射向其的光线反射，并使其重新被利用。
灯板3包括的底板31、光源固定板32、连接机构33、遮挡件34和反射板35的材质均为铝，以使得灯板3的散热性能良好，有利于维持光源的性能稳定，进而维持背光模组的性能稳定。
为了便于本领域技术人员理解本发明实施例中的拼接屏的优势，下面对现有技术中的拼接屏和本发明实施例中的拼接屏进行如下对比：
现有技术中和本发明实施例中的拼接屏的相同点在于，拼接屏均包括相互拼接的9个55寸的显示模组。现有技术中和本发明实施例中的拼接屏的不同点在于，如图1和图2所示，现有技术中的拼接屏中的背光模组2’包括LED光源21’和扩散板22’，如图3所示，本发明实施例中的拼接屏的背光模组包括18个灯板3，其中，较长的两个侧壁上分别设置有6个灯板3，较短的两个侧壁上分别设置有3个灯板3，如图4和图5所示，每个灯板3上的光源固定板32与底板31之间形成的夹角的角度为110°，光源为COB LED，每个灯板3的光源固定板32上固定20个COB LED，该COB LED的参数如下：型号(Part Number)：MC-13BT-930-H-0305-C；相关色温(CCT)：9300K；光通量(Flux)：320lm；能效水平(Eff)：118lm/W；电压：9V；电流： 300mA。
现有技术中的拼接屏和本发明实施例中的拼接屏需要达到的目标性能为：光源的功耗为1202W，中心区域的亮度均为100nit。
测试结果表明，现有技术中的拼接屏，LED光源21’的功耗高达1280W，中心区域的亮度为70nit，而本发明实施例中的拼接屏，COBLED的功耗仅为1162.2W，中心区域的亮度则为100.4nit。综上所述可知，现有技术中的拼接屏的功耗高，且中心亮度不达标，而本发明实施例中的拼接屏在功耗较低的情况下，可以满足中心区域的亮度需求。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所附权利要求的保护范围为准。

Claims (16)

  1. 一种拼接屏，包括箱体、背光模组和相互拼接的多个显示模组，所述箱体包括四个侧壁和一个箱底，所述多个显示模组与所述箱底相对地固定于所述箱体上，其特征在于，所述背光模组包括设置于四个侧壁上的多个灯板，每个所述灯板包括：底板，光源固定板，以及固定于所述光源固定板上的光源，其中所述光源固定板与所述底板的靠近所述显示模组的第一边连接，并且与所述底板之间形成夹角。
  2. 根据权利要求1所述的拼接屏，其特征在于，所述光源包括多个采用板上芯片封装模式封装的发光二极管，多个所述发光二极管在所述光源固定板上沿所述侧壁的延伸方向依次排列。
  3. 根据权利要求2所述的拼接屏，其特征在于，所述箱体的长度和宽度相同，设置于四个侧壁上的多个灯板中的光源固定板与底板之间形成的夹角的角度相同，并且每个侧壁上的所述发光二极管发出的光线能照射至所述箱底的边缘到距离所述侧壁L/2的位置处，其中，L为所述箱体的长度。
  4. 根据权利要求3所述的拼接屏，其特征在于，每个所述灯板沿所述光源固定板延伸方向上的长度为535～560mm，每个所述灯板沿垂直于所述光源固定板延伸方向上的宽度为550～750mm。
  5. 根据权利要求3所述的拼接屏，其特征在于，所述光源固定板的宽度为20～26mm。
  6. 根据权利要求3所述的拼接屏，其特征在于，在所述发光二极管的发光角为-60°～60°时，所述光源固定板与所述底板之间形成的夹角的角度为108°～113°。
  7. 根据权利要求2所述的拼接屏，其特征在于，所述箱体的长度和宽度不同，设置于较长的两个侧壁上的灯板中的光源固定板与底板之间形成的夹角的小于设置于较短的两个侧壁上的灯板中的光源固定板与底板之间形成的夹角，设置于较长的两个侧壁上的灯板中的光源固定板上的发光二极管发出的光线能照射至所述箱底的边缘到距离所述侧壁W/2的位置处，设置于较短的两个侧壁上的灯板中的光源固定板上的发光二极管发出的光线能照射至所述箱底的边缘到距离所述侧壁L/2的位置处，其中，L为所述箱体的长度，W为所述箱体的宽度。
  8. 根据权利要求7所述的拼接屏，其特征在于，所述箱体的长度为3.6～3.8m，所述箱体的宽度为2.0～2.2m，所述箱体的厚度为0.55～0.75m。
  9. 根据权利要求1所述的拼接屏，其特征在于，所述光源固定板上覆盖有反射层。
  10. 根据权利要求1所述的拼接屏，其特征在于，所述灯板还包括从所述光源固定板远离所述底板的一边延伸出的遮挡件，所述遮挡件与所述光源固定板形成弯折结构。
  11. 根据权利要求10所述的拼接屏，其特征在于，所述遮挡件上覆盖有反射层。
  12. 根据权利要求10或11所述的拼接屏，其特征在于，所述遮挡件与所述光源固定板形成的弯折结构的截面形状为三角形或者梯形。
  13. 根据权利要求1所述的拼接屏，其特征在于，所述底板上覆盖有反射层。
  14. 根据权利要求1所述的拼接屏，其特征在于，所述灯板还包括反射板，所述反射板与所述底板的远离所述显示模组的第二边连接，所述第二边与所述第一边相对设置。
  15. 根据权利要求1所述的拼接屏，其特征在于，所述灯板可拆卸地连接于所述箱体的侧壁上。
  16. 根据权利要求15所述的拼接屏，其特征在于，所述灯板还包括位于所述底板的两个侧边上的多个连接机构。
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