EP2081172A1 - Anzeigetafel und Anzeigesystem - Google Patents
Anzeigetafel und Anzeigesystem Download PDFInfo
- Publication number
- EP2081172A1 EP2081172A1 EP08000921A EP08000921A EP2081172A1 EP 2081172 A1 EP2081172 A1 EP 2081172A1 EP 08000921 A EP08000921 A EP 08000921A EP 08000921 A EP08000921 A EP 08000921A EP 2081172 A1 EP2081172 A1 EP 2081172A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pixels
- display
- display panel
- circuit boards
- frame
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Images
Classifications
-
- 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
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
- G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
- G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
- G09F2013/222—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent with LEDs
-
- 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
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
Definitions
- the present invention generally relates to display panels, more particularly, the present invention relates to a LED display panel for use in a large-scale modular display composed of a plurality of such panels.
- Display units for entertainment, architectural, and advertising purposes have commonly been constructed of numbers of light emitting elements, such as light emitting diodes (LEDs). These LEDs may be selectively turned on and off to create patterns, graphics, and video displays for both informational and aesthetic purposes. It is well known to construct these displays of tiles or large panels, each containing a number of LEDs, which may be assembled in position for an entertainment show or event, or as an architectural or advertising display.
- LEDs light emitting diodes
- a display apparatus comprises a plurality of light-emitting element panels, each having a support frame and a plurality of light-emitting element bars arranged in parallel at regular intervals and connected to the support frame.
- the light-emitting element bar has a thin display module which comprises pixels mounted on the front surface of a long wiring board. Each pixel has LEDs (light-emitting diodes).
- the display system according to EP 1 293 955 is not susceptible to wind, the background of display can be seen and the display can be illuminated from behind.
- the object of the present invention is to improve transparency of the display structure retaining the advantages of manufacturing the display panels using standard printed circuit board technology.
- the general purpose of the present invention is to provide a display panel having improved transparency while retaining or even improving manufacturability and reliability of the prior art displays.
- Transparency of a prior art display is mostly limited by the width of light-emitting element bars which in turn is mostly defined by the width of printed circuit boards (PCBs) placed inside the bars.
- PCBs printed circuit boards
- the width of the circuit board needs to be reduced.
- the width of printed circuit boards in prior art displays already is about 16 mm and a further reduction of the width is problematic.
- a narrower PCB will be less reliable and more expensive in manufacturing.
- the PCBs are turned at 90 degree to the display viewing surface.
- the side profile of the PCB is much thinner than its front face, the display panel will have a substantially more empty, transparent space.
- the PCBs being turned through 90 degrees, the LEDs will emit light in a side direction or parallel to the viewing surface.
- reflectors or light guides may be used to re-direct lights into required direction.
- mounting additional elements, such as reflectors or light guides on the PCB may significantly complicate assembling and rise cost of the display panel.
- Another solution may be to mount LEDs at an angle to the PCB, for example using LEDs with leads and bending these leads.
- LEDs with leads are more expensive, and a process of mounting LEDs with bent leads, or a process of bending LED leads after the mounting would significantly complicate assembling and therefore rise cost, and reduce reliability of the display.
- LEDs For a long time side-view or side-emitting LEDs have been widely used as light sources of backlight units of a small-sized liquid crystal displays (LCDs) in mobile phones, Personal Digital Assistants (PDAs) and so on.
- LCDs liquid crystal displays
- PDAs Personal Digital Assistants
- SMT surface mount technology
- a display panel having a plurality of pixels disposed on a surface of the display panel, wherein the plurality of pixels are configured to receive an electrical signal and power.
- the display panel further comprises a frame, and a plurality of elongated circuit boards connected to the frame, wherein the plurality of pixels are disposed on the plurality of elongated circuit boards. Further, the circuit boards are oriented perpendicular with respect to the display surface.
- the pixels comprise light emitting diodes (LEDs) of surface-mount side-view type.
- the pixels comprise LEDs of three different colours, thus allowing create full colour images.
- the pixels comprise LED drivers mounted on the circuit boards together with the LEDs. Mounting the LED drivers on the same circuit board allows to reduce a number of wires connected to the circuit board.
- the circuit boards are connected to the frame by detachable connectors, thus allowing an easy replacement of damaged board.
- a display system including a plurality of display panels.
- Each of the plurality of display panels includes a plurality of pixels disposed on a surface of the display panel, wherein the plurality of pixels are configured to receive an electrical signal and power.
- the display panel further comprises a frame, and a plurality of elongated circuit boards connected to the frame, wherein the plurality of pixels are disposed on the plurality of elongated circuit boards. Further, the circuit boards are oriented perpendicular with respect to the display surface.
- the pixels comprise LEDs of surface-mount side-view type.
- a method for displaying an image includes providing a display panel, wherein the display panel comprises: a plurality of pixels disposed on a surface of the display panel, wherein the plurality of pixels are configured to receive adata signal and power; a frame; and a plurality of elongated circuit boards connected to the frame, wherein the plurality of pixels are disposed upon the plurality of elongated circuit boards, wherein the circuit boards are oriented substantially perpendicular with respect to the display surface, and the pixels comprise LEDs of surface-mount side-view type.
- the method further comprises sending the data signal to the display panel, wherein the plurality of pixels are further configured to display the image based on the data signal.
- combination of side emitting LEDs mounted at a printed circuit board by surface-mount technology and turning the PCB orthogonal to the viewing surface may increase transparency of the display by more than 40%, and allow to build transparent video displays with a smaller pixel pitch.
- surface-mount side-view type light emitting diode herein is meant a LED lamp or LED package, designed for surface mount technology (SMT), that emits light substantially in parallel to the mounting surface.
- the lamp or package may comprise one or several LEDs.
- LED devices are usually called side-view or side-emitting LEDs.
- SMT Surface mount technology
- PCBs printed circuit boards
- An SMT component is usually smaller than its leaded counterpart because it has either smaller leads or no leads at all.
- Electronic devices so made are called surface-mount devices or SMDs.
- LED driver herein is meant a driver circuit configured to vary the intensity of light emitted from the LEDs.
- LED drives are made as specialised integral circuit (IC), for example, DM412 manufactured by Silicon Touch Technology, Taiwan.
- the display panel 24 includes a frame 26 having a plurality of elongated circuit boards 28 connected thereto. Further, each elongated circuit board 28 includes pixels 30 mounted on it, each of the pixels 30 including one or several LEDs of surface-mount side-view type. Thus, the display panel includes multiple circuit boards connected to the frame, and each of the circuit boards including multiple pixels.
- the display panel 24 further comprises a control unit (not shown) configured to control the plurality of pixels 30 to display an image according to an input data signal.
- the control unit may be housed inside the frame 26 as in this preferred embodiment, or it may be made as a separate module attached to the frame. In case the control unit is made as a separate module one control unit may control one or several display panels.
- Each panel control unit may be directly connected to the main control unit of the display system, or panel control units may be connected in series to each other and then to the main control unit.
- the control unit may include communication means for receiving data signals from the main processor and LED drivers for controlling the LEDs.
- the frame 26 consists of a number of metal tubes mechanically joined together to form a strong and stable construction.
- the frame may be made of a thin, rigid, lightweight material such as a metal so that the entire frame is very lightweight.
- metals can include aluminium or other lightweight metals.
- plastic, fibreglass, carbonaceous materials and other lightweight materials and various combinations thereof can be used.
- frame 26 Mechanical construction of frame 26 is such that it is sufficiently thin and flat, and does not reduce transparency of the display panel.
- FIG 4 shows an enlarged perspective view of the upper right corner part of the display panel 24.
- the elongated circuit boards 28 are oriented substantially perpendicular with respect to the display surface, which means that the planar surface of the circuit board is orthogonal to the viewing plane of the display. With this orientation, the thinner side of the circuit board 28 is exposed to the visible path through the display surface thereby enhancing the transparency of the display panel 24.
- Each circuit board 28 is made from a monolith single piece fibreglass material, preferably a non-reflective or substantially non-reflective material having a black pigment.
- the circuit board 28 is made as a single printed circuit board.
- the circuit board can be made from one-ply or multi-ply printed circuit board, mechanically and electrically connected together by means of connectors or other connecting means.
- the thickness of the printed circuit board is sufficiently smaller than its width. Thus, for an observer who looks at the front of the display panel, the transparency of the display panel 24 is substantially increased in comparison with a prior art display panel.
- the circuit boards 28 may be connected to the frame 26 by any way known in the art, for example, by using bolts, screws, pins, connectors with latches or any other connecting means.
- Each pixel 30 may include one or more LEDs of surface-mount side-view type.
- the pixel includes LEDs of three colours, so called RGB LEDs of red, green and blue colours, in a single surface-mount ceramic package, for example, NSSM038AT manufactured by Nichia, Japan.
- the pixels may include a single colour LED of red, green, blue, yellow, amber, or white colour.
- the pixels may include several individual LEDs or LED packages. Further, LEDs may be mounted on one or the both surfaces of the circuit board. Thus, the total light output power is increased with almost the same transparency level.
- the LEDs are located in such a way that a light emitting surface of each LED is laying close to the edge of the circuit board.
- the circuit board does not deteriorate visibility of the light emitted from the LEDs, and a wide viewing angle is achieved.
- the plurality of circuit boars 28 are mounted at the frame 26 in parallel to each other with a regular arrangement to achieve a distortion-free image displayed over the display panel 24.
- the plurality of pixels 30 are also mounted at the circuit boars 28 with a regular arrangement to form a regularly arranged pattern of pixels.
- the pitch between the pixels is 40 mm in vertical and horizontal directions, however those skilled in the art will appreciate that other pitch values are possible depending on intended use of the display.
- the panel 24 receives control signals from a main processor (not shown) by means of data cables (not shown) and uses those signals to activate and modulate the illumination of the pixels 30 that create a portion of an overall display image.
- FIG. 5 Another preferred embodiment is shown in FIG. 5 .
- the panel 34 in this embodiment is similar to the panel 24 shown on FIGs. 3 and 4 , it includes a frame 36 and elongated circuit boards 38 connected to the frame 36 and pixels 40 mounted on the circuit boards 38.
- pixels 40 include LEDs and LED drivers 42 mounted on the same elongated circuit board 38.
- each LED is connected to a corresponding LED driver by a separate wire, when 10 pixels are mounted on each board and each pixel comprises three LEDs, more than 30 wires are needed to connect the circuit board with its control unit, whereas if corresponding LED drivers are mounted on the same circuit board with the LEDs, then the circuit board may be connected to the control unit only by tree wires.
- the circuit board 38 may be removably connected to the frame 36, for example, by a detachable connector 44, thus allowing an easy replacement of a damaged circuit board 38.
- a detachable connector 44 may be removably connected to the frame 36 by any mechanical arrangement, for example, inserted in a slot made in the frame 36.
- the panel 34 on FIG. 5 further comprises a data and power input 46 by which the display panel is connected to an external control unit (not shown) or another display panel (not shown).
- the elongated circuit boards of the preferred embodiments shown in FIGs. 3 , 4 , and 5 may be surrounded by a light transmitting material to protect them from elements.
- the light transmitting material is to be in the form of a tube, still more preferably, of a tube of an elliptical or rectangular cross-section.
- the circuit boards may be covered with a light transmitting material, for example, a shrink-wrapped film or lacquer.
- the display panel described above is the smallest user-configurable lighting element of a large-scale display and contains all the electronic circuitry necessary to power and drive an array of pixels. Several panels may be combined together to form a large-area transparent display system.
- FIG. 6 shows a display system 50 in accordance with one or more embodiments of the present invention.
- the display system 50 comprises a plurality of display panels 52, such as panels described above. Each panel comprise a plurality of pixels 56 mounted on circuit boards 58.
- a plurality of display panels 52 are arranged in two columns and two rows per column.
- various other combinations of the display panels 52 may be connected to each other to provide other configurations of the overall display.
- the display system 50 further includes a power unit 62 configured to provide power to the pixels 56 and electronics of the display panel 52 and a main processor 60 providing a data signal to control units 54 of the display panels 52.
- the data signal may be any data signal known in the art, such as an analogue video signal, a digital video signal, or a still image.
- the control unit 54 is configured to control one or more pixels 56 to emit a colour of light based on the input data signal and the location of the one or more pixels.
- the display panel 52 may include a single control unit 54 configured to provide a control signal to each pixel 56 of the display panel 52, or the display panel 52 may contain more than one control unit 54, wherein each control unit 54 is configured to provide a control signal to a subset of pixels 56.
- each pixel 56 may include a driver circuit, and the control unit 54 may send a control signal to each driver circuit, whereby the driver circuit controls the intensity of each LED to produce a specified colour.
- each elongated circuit board 58 of the display panel 52 may instead include a control unit 54 configured to send a control signal to each driver circuit of the pixels on the board.
- the driver circuits of the pixels 56 may constitute the control unit 54.
- the data signal from the main processor 60 may be sent to each driver circuit of each pixel 56.
- a driver circuit for a pixel would then pull the respective data for the corresponding pixel from the data signal.
- a control unit 54 and driver circuits may be used such that the pixels of the display panel are controlled to emit a colour of light according to the data signal.
- the signals between the main processor 60, the control unit 54, the driver circuits, and the pixels 56 may be transmitted by any way known in the art, such as by cables, traces on a PCB, or wireless communication.
- a cable from the main processor 60 may be connected to a signal input on the display panel 52.
- the control unit 54, the driver circuits, and/or the pixels 56 may be electrically connected to the input data signal by traces on a PCB.
- the panel 50 may receive the data signal from the main processor 60 by wireless communication.
- Embodiments of the present invention may provide one or more of the following advantaged.
- First, embodiments disclosed herein may provide for a display panel and a display system having increased transparency.
- Second, embodiments disclosed herein may provide for a display panel having an improved manufacturability. By using standard printed circuit board technology the display panel may be easily manufactured.
- Third, embodiments disclosed herein may provide for a display panel with improve reparability allowing easily replace damaged circuit board with pixels without dismounting a panel.
- each panel has 10 PCB and each PCB has 10 pixels mounted on it.
- the distance between pixels in the preferred embodiment is 40 mm in both vertical and horizontal directions, thus the size of one panel is 500x500 mm and the panel as well as a display made of such panels have a transparency ratio of more than 85%.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08000921A EP2081172A1 (de) | 2008-01-18 | 2008-01-18 | Anzeigetafel und Anzeigesystem |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08000921A EP2081172A1 (de) | 2008-01-18 | 2008-01-18 | Anzeigetafel und Anzeigesystem |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2081172A1 true EP2081172A1 (de) | 2009-07-22 |
Family
ID=39133859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08000921A Withdrawn EP2081172A1 (de) | 2008-01-18 | 2008-01-18 | Anzeigetafel und Anzeigesystem |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2081172A1 (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102117579A (zh) * | 2009-12-31 | 2011-07-06 | 林谊 | 一种高透明led显示模块 |
WO2013012937A1 (en) * | 2011-07-18 | 2013-01-24 | Elite Multimedia Productions, Inc. | Flexible led panel system |
CN103065560A (zh) * | 2013-01-11 | 2013-04-24 | 林谊 | 一种led显示屏显示单元及其生产方法 |
TWI416441B (zh) * | 2009-09-10 | 2013-11-21 | Formolight Technologies Inc | LED display kanban |
CN111243454A (zh) * | 2020-03-25 | 2020-06-05 | 利亚德智慧显示(深圳)有限公司 | 显示屏 |
CN113539129A (zh) * | 2021-07-14 | 2021-10-22 | 广州市耐贝西照明有限公司 | 一种幻彩屏及产生幻彩图案的方法 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5900850A (en) | 1996-08-28 | 1999-05-04 | Bailey; James Tam | Portable large scale image display system |
US6237290B1 (en) | 1998-10-27 | 2001-05-29 | Avix Inc. | High-rise building with large scale display device inside transparent glass exterior |
EP1293955A2 (de) | 2001-09-14 | 2003-03-19 | Kast Co., Ltd. | Anzeigevorrichtung |
US6677918B2 (en) | 2001-09-21 | 2004-01-13 | Yuji Yuhara | Light emitting diode display system |
US6699341B2 (en) | 2000-06-20 | 2004-03-02 | Schott Glas | Process for the fabrication of glass ceramic structures |
US20060067640A1 (en) * | 2004-09-24 | 2006-03-30 | Min-Hsun Hsieh | Illumination package |
US20070176854A1 (en) | 2006-01-25 | 2007-08-02 | Element Labs, Inc. | Irregular screen format for led and oled systems |
US20070279338A1 (en) | 2006-05-01 | 2007-12-06 | Element Labs, Inc. | Display system having pixels |
-
2008
- 2008-01-18 EP EP08000921A patent/EP2081172A1/de not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5900850A (en) | 1996-08-28 | 1999-05-04 | Bailey; James Tam | Portable large scale image display system |
US6237290B1 (en) | 1998-10-27 | 2001-05-29 | Avix Inc. | High-rise building with large scale display device inside transparent glass exterior |
US6699341B2 (en) | 2000-06-20 | 2004-03-02 | Schott Glas | Process for the fabrication of glass ceramic structures |
EP1293955A2 (de) | 2001-09-14 | 2003-03-19 | Kast Co., Ltd. | Anzeigevorrichtung |
US6677918B2 (en) | 2001-09-21 | 2004-01-13 | Yuji Yuhara | Light emitting diode display system |
US20060067640A1 (en) * | 2004-09-24 | 2006-03-30 | Min-Hsun Hsieh | Illumination package |
US20070176854A1 (en) | 2006-01-25 | 2007-08-02 | Element Labs, Inc. | Irregular screen format for led and oled systems |
US20070279338A1 (en) | 2006-05-01 | 2007-12-06 | Element Labs, Inc. | Display system having pixels |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI416441B (zh) * | 2009-09-10 | 2013-11-21 | Formolight Technologies Inc | LED display kanban |
CN102117579A (zh) * | 2009-12-31 | 2011-07-06 | 林谊 | 一种高透明led显示模块 |
WO2013012937A1 (en) * | 2011-07-18 | 2013-01-24 | Elite Multimedia Productions, Inc. | Flexible led panel system |
US20140253414A1 (en) * | 2011-07-18 | 2014-09-11 | Jeremy Byrd | Flexible LED Panel System |
US9269291B2 (en) * | 2011-07-18 | 2016-02-23 | Jeremy Byrd | Flexible LED panel system |
CN103065560A (zh) * | 2013-01-11 | 2013-04-24 | 林谊 | 一种led显示屏显示单元及其生产方法 |
CN103065560B (zh) * | 2013-01-11 | 2015-09-09 | 深圳市晶泓科技有限公司 | 一种led显示屏显示单元及其生产方法 |
CN111243454A (zh) * | 2020-03-25 | 2020-06-05 | 利亚德智慧显示(深圳)有限公司 | 显示屏 |
CN113539129A (zh) * | 2021-07-14 | 2021-10-22 | 广州市耐贝西照明有限公司 | 一种幻彩屏及产生幻彩图案的方法 |
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