WO2016173096A1

WO2016173096A1 - Device combining led display and reflective display

Info

Publication number: WO2016173096A1
Application number: PCT/CN2015/081380
Authority: WO
Inventors: 海耶斯罗伯特·安德鲁; 郭媛媛; 周国富
Original assignee: 深圳市国华光电科技有限公司; 深圳市国华光电研究院; 华南师范大学
Priority date: 2015-04-27
Filing date: 2015-06-12
Publication date: 2016-11-03
Also published as: CN104795002A

Abstract

A device (100) combining LED display and reflective display, comprising: at least one display panel (10), comprising an LED component (12), a reflective display component (11) and a support piece (13) configured to support the LED component (12) and the reflective display component (11), the LED component (12) and the reflective display component (11) being arranged in a way of getting close to each other; at least one driving unit (40), separately connected to the LED component (12) and the reflective display component (11) so as to simultaneously or separately change display statuses of the LED component (12) and the reflective display component (11); and a control unit (50), connected to the driving unit (40) and configured to send a control command to the driving unit (40) according to a light environment where the device (100) is positioned so as to change the display statuses of the LED component (12) and the reflective display component (11). The device (100) not only can use a reflective display component (11) with a higher contrast ratio to display in the daytime, but also can use an LED component (12) with a higher brightness to display at night, thereby saving energy while guaranteeing an excellent display effect.

Description

Device combining LED display and reflective display

Technical field

The invention relates to a display device, in particular to a device combining LED display and reflective display, which is suitable for the fields of digital sign display, large area outdoor display, building decoration and the like.

Background technique

LED displays are increasingly used in cities to display rich living content and advertising messages. Especially at night, these displays use illuminating LED display technology to generate dynamic images that attract eyeballs very efficiently. However, these displays have disadvantages, such as insufficient contrast in the LED display during daylight hours, and the display is worse than traditional static printing signs. If a clearer image is to be displayed, it is necessary to increase the power output of the light-emitting element to obtain higher brightness and contrast, thereby greatly increasing energy consumption. We have noticed that traditional printed signs are better at daytime display because they are directly reflected by the reflection of external light.

Current reflective display technologies such as Electrofluic Display System, EFD) can also be called electrowetting display technology (EWD), and electrochromic display technology (Electrochromic Display, ECD). The microfluidic display technology can be specifically referred to the publication WO2003/071346, a well known application of which is electronic ink (E-ink) or electronic paper (E-paper). Electrowetting refers to changing the wettability of a droplet on a substrate by changing the voltage between the droplet and the insulating substrate, that is, changing the contact angle to cause the droplet to expand and contract. Electrochromism refers to the stable, reversible color change of the optical properties (reflectance, transmittance, absorptivity, etc.) of a material under the action of an applied electric field, which appears as a reversible change in color and transparency in appearance. Therefore, reflective display elements fabricated using the above principles generally have excellent contrast properties. However, displays using these technologies have poor brightness at night.

Therefore, there is a need to implement a green energy saving, and it is possible to display a moving image with high contrast during daytime or nighttime, attracting the attention of the observer.

Summary of the invention

The object of the present invention is to solve the deficiencies of the prior art and to provide a device combining LED display and reflective display, which can obtain an efficient display effect in a high light environment and a dim environment.

In order to achieve the above object, the present invention adopts the following technical solutions:

An apparatus for combining LED display and reflective display is provided, comprising: at least one display panel comprising an LED element, a reflective display element, and a support for supporting the LED element and the reflective display element, the LED An element and the reflective display element are arranged in an orderly interleaving manner; at least one driving unit, the driving unit being respectively connected to the LED element and the reflective display element to change the LED simultaneously or separately a display state of the element and the reflective display element; a control unit coupled to the drive unit, configured to send a control command to the drive unit to change the LED element and the light according to an illumination environment in which the device is located The display state of the reflective display element. In a preferred embodiment, the LED element and the reflective display element can share a single drive unit and/or a control element.

Wherein, the reflective display element includes, but is not limited to, a microfluidic display element, an electrowetting display element, and/or an electrochromic display element.

Preferably, the LED element is connected to a support of a display panel, the reflective display element being disposed between the LED elements and tiling on the support such that an edge of the reflective display element The edges of the adjacent LED elements are matched. Preferably, in another aspect, the LED element is disposed in the reflective display element, and the reflective display element and the LED element are coupled together to a support of the display panel.

Further, a portion of the LED element is located on an upper portion of the reflective display element such that a portion of the light emitted by the LED element can be illuminated onto the reflective display element.

Preferably, the display panel further includes: a circuit board respectively connected to the LED element and the reflective display element, and integrally integrated with the support; a protective layer, the protective layer is disposed on the The support member and/or overlying the LED element and the reflective display element enable the LED element and the reflective display element to resist environmental attack.

Further, in order to perform modular installation on a plurality of display panels, the apparatus further includes: a bracket for encapsulating the display panel, the bracket is provided with a plurality of mounting holes; and a lining for assembling the brackets The liner includes a positioning mechanism for positioning the bracket and a mounting mechanism that mates with the bracket.

Preferably, the control unit sends a control command to the driving unit according to an external lighting environment or according to a predetermined instruction, so that in a high light environment, the reflective display element is displayed while the LED element is not displayed, and In a low light environment, the reflective display element is not displayed while the LED elements are displayed. Preferably, the apparatus further includes a light sensor such that the control unit receives data of the light sensor to determine an ambient light environment. Preferably, in another aspect, the control unit sends a control command to the driving unit, so that the reflective display element and the LED element are synchronously displayed, and the brightness of the LED element is adjusted according to a change in brightness of the illumination environment. While the reflective display element remains displayed and does not refresh. The reflective display element receives or reflects a portion of the light of the illuminated LED element.

The invention has the beneficial effects that the display panel combined with the illuminating and reflective display elements can be displayed during the day using a reflective display element with higher contrast, and can be displayed at night by using a brighter LED component. Therefore, while ensuring excellent display effect, energy can be saved; the arrangement of the reflective display element and the LED element can fully utilize the space between the LED elements to achieve higher display resolution; Different display states between the component and the reflective component that receives the light can obtain a variety of reflective, light-transmitting and light-mixing display effects; provide protective components to protect the display components in the display panel in an outdoor environment, and improve the use Lifetime; LED components and reflective display components can share a single drive unit or a control component, which not only saves electrical components but also achieves energy-saving optimization purposes; the display panel has a modular package structure, reduces manufacturing costs, and is easy to expand and assemble, which is convenient in the future. Inspection and disassembly.

DRAWINGS

1 is an array of LED elements of a prior art LED panel;

Figure 2 shows a first embodiment of a display panel in a device according to the invention;

Figure 3 is a cross-sectional view of the display panel of Figure 2;

Figure 4 shows a second embodiment of a display panel in a device according to the invention;

Figure 5 shows a third embodiment of a display panel in a device according to the invention;

Figure 6 is a schematic front elevational view of one embodiment of a device in accordance with the present invention, wherein a display panel is detached from the lower right corner of the device;

Figure 7 is a schematic rear view of one embodiment of a device in accordance with the present invention.

detailed description

Exemplary embodiments in accordance with the present invention will be described in detail below with reference to the accompanying drawings. The same reference numbers are used throughout the drawings.

Figure 1 is a schematic view showing the structure of a conventional LED panel in which the LED element 12 occupies only a very small portion of the entire surface of the display area. For example, for a conventional LED panel, the LED element 12 has a diameter of 3 mm and a pitch of 10 mm, and the LED element 12 only occupies about 7% of the display surface area of the panel. Therefore, most of the remaining blank areas (about 90% of the total display area) are not utilized.

In one embodiment in accordance with the present invention, the reflective display element 11 can be closely disposed between the LED elements 12 of the display panel 10, as shown in FIG. The reflective display element 11 can adopt the existing reflective display technology, and the display content can be seen by reflecting external light. Suitable reflective display technologies are, for example, microfluidic display technology (EFD) or electrowetting display technology (EWD), electrochromic display technology (ECD), and the like. For static content-based or low-refresh monochrome display applications, an electronic paper (E-ink) display component (a type of EFD) can be used because the display component basically only refreshes the display content. It consumes power and is very energy efficient when displaying content at rest. For applications that require full color display and need to display video, EFD or EWD display components can be used. ECD technology is also suitable for use in the present invention. The display elements of the technology simultaneously have the property of changing their own color and transparency, and can be used not only for reflected light but also for light transmissive applications. In the present embodiment, the LED element 12 can be a well-known in-line, patch or any package type component, thereby serving as an LED dot matrix pixel on the display panel 10.

FIG. 3 is a cross-sectional view showing the display panel 10 of the present embodiment. The display panel 10 includes a support member. The reflective display element 11 and the LED element 12 are fixedly spaced apart on the support element. Preferably, the support element comprises a circuit board to which the reflective display element 11 and the LED element 12 are soldered. Preferably, the apparatus 100 according to the present invention also provides a bracket 14 for each display panel 10 that is disposed at the bottom of the support member for protecting the circuit board and encapsulating the display panel 10. The bracket 14 is provided with a mounting hole 15.

In the present embodiment, a portion of the LED element 12 can protrude beyond the surface of the reflective display element 11 so that the LED element 12 can achieve a maximum emission angle and can also emit a portion of the light to the adjacent reflective display element 11. This has the advantage that the illuminating performance of the LED can be fully utilized, and part of the light of the LED element 12 can be captured by the reflective display element 11 to enhance display. For example, as shown in FIG. 3, while the LED element 12 emits light outward, a small portion of the light is directed toward the reflective display element 11, and when the reflective display element 11 displays white, it even displays the same color as the light. At that time, all the light of the LED can be fully utilized, and the display brightness and the chromaticity of the corresponding illuminating color can be increased. Optionally, a protective layer 16 may be provided between the display element (including the LED element 12 and the reflective display element 11) and the support member 13 for protecting the metal contact portion of the display element from moisture and gas in the external environment. It is oxidized by oxidation. In the case where the protection requirement is higher, the protective layer 16 may be disposed on the display element so that the protective layer 16 completely covers all the display elements, thereby providing a more effective protection effect.

Referring to FIG. 4, in another embodiment of the display panel 10, the LED elements 12 may be disposed in the reflective display element 11, preferably in the middle of each of the closely-reflected reflective display elements 11, for maximum display. Space utilization. In another embodiment, the LED element 12 and the reflective display element 11 may be configured in any shape, as shown in FIG. 5, for example, the LED element 12 may be in the form of a strip and a strip, and arranged in a mixed manner with the reflective display element 11, Match their edges to each other. In this arrangement, the illuminated LED elements 12 and the reflective reflective display elements 11 interact with each other to achieve a variety of mixed display effects, resulting in a display of interest. For example, the reflective display element 11 is implemented as an ECD display element, and the LED element 12 can be embedded inside the ECD display element, changing the color and transparency of the ECD display element while the LED element 12 is illuminated. The device 100 including such a display panel 10 is very suitable for wall decoration of a building, providing a pleasant display effect. In addition, those skilled in the art should understand that the number and shape of the display elements in the drawings are merely exemplary and are not intended to limit the invention.

6 is a front elevational view of one embodiment of an apparatus 100 incorporating LED display and reflective display in accordance with the present invention. Figure 7 is a schematic illustration of the back side of the device 100. The apparatus 100 includes a plurality of display panels 10 including LED elements 12 and reflective display elements 11; a cradle 14 for packaging the display panel 10 (not shown in Figures 6 and 7); for detecting ambient light Light sensor 20; a lining plate 30 for assembling the display panel 10; a driver connected to the display panel 10; and a controller connected to the driver. To describe the structural features of the device 100, the display panel 10 is removed at the lower right corner of the device 100. In the present embodiment, the lining plate 30 includes a positioning structure 31 and a mounting structure 32 to mount the plurality of display panels 10 adjacent to the lining plate 30 by the bracket 14. Specifically, the positioning structure 31 of the lining plate 30 may be a pin hole, a positioning convex surface or the like, and the mounting structure 32 of the lining plate 30 may be a screw mounting hole 15, a rivet hole or the like. Correspondingly, a mounting structure 32 and a positioning structure 31 that cooperate with the bracket 14 of the display panel 10 are also provided. In this way, a large-area display device 100 can be assembled by any number of display panels 10 for ease of installation and maintenance.

The light sensor 20 is preferably disposed on the front side of the device 100, and the control unit 50 and the drive unit 40 are preferably disposed on the back of the device 100. Each of the display panels 10 may include a socket 17 that is connected to the LED elements 12 and the reflective display elements 11 through a circuit board to facilitate connection and expansion of the plurality of display panels 10. Preferably, the driving unit 40 can simultaneously integrate the circuit elements required for the LED element 12 and the reflective display element 11, reducing the repeated configuration of the same circuit elements of the two types of display elements, and reducing the cost. Then, the sockets 17 of all the display panels 10 are connected to the driving unit 40 by means of a bus, so that driving of a plurality of display elements can be realized with one or a small number of driving units 40. It is also possible to integrate each of the display panels 10 with one drive unit 40 and configure the sockets 17 as input and output interfaces of the drive unit 40 to realize modular drive of the single display panel 10.

In the present embodiment, the mode switching control command of the display unit 10 of the control unit 50 is transmitted to the driving unit 40. Specifically, during the day, the control unit 50 sends a control command to the driving unit 40 to cause the display panel 10 to operate in the reflective mode, that is, to turn off the LED element 12 in the display panel 10 and display the reflective display element 11, thereby reducing The power consumption and the display contrast of the image are greatly increased; at night, the controller sends a control command to the driving unit 40 to cause the display panel 10 to operate in the lighting mode, that is, to cause the LED elements 12 in the display panel 10 to emit light and reflect The display element 11 does not operate, thereby obtaining a nighttime display effect of the cymbal. Preferably, the control unit 50 receives the data of the light sensor 20 to determine an ambient lighting environment to determine the switching timing of the day mode and the night mode. Moreover, in some applications, the control unit 50 sends control commands to the drive unit 40 such that the reflective display element 11 and the LED elements 12 are simultaneously displayed, adjusting the display state of the display elements, such as brightness and Color, and causing the reflective display element 11 to receive a portion of the light of the illuminated LED element 12. In some applications, due to the high and low variation of the brightness of the light during the day, the illumination intensity of the LED element 12 can be controlled by the control unit during this time, thereby providing a light source for the reflective display element 11, and the reflective display element 11 can Keep the display but not refresh to save energy. The control unit 50 can also control the plurality of display panels 10 to cooperate to display the desired image according to preset instructions or input data.

Although the description of the present invention has been described in considerable detail and particularly in terms of several embodiments, it is not intended to be limited to any such details or embodiments or any particular embodiments. The appended claims are intended to provide a broad understanding of the scope of the invention, and the scope of the invention. In addition, the present invention has been described above by way of example of the invention, which is intended to provide a useful description, and the non-substantial modifications of the present invention, which are not yet foreseen, may still represent equivalent modifications of the invention.

Claims

A device (100) incorporating an LED display and a reflective display, characterized in that the device (100) comprises:

At least one display panel (10) comprising an LED element (12), a reflective display element (11), and a support for supporting the LED element (12) and the reflective display element (11) ( 13), the LED element (12) and the reflective display element (11) are arranged in an orderly staggered manner;

At least one driving unit (40) connected to the LED element (12) and the reflective display element (11), respectively, to simultaneously or separately change the LED element (12) and a display state of the reflective display element (11);

a control unit (50) connected to the driving unit (40) for transmitting a control command to the driving unit (40) according to an illumination environment in which the device (100) is located to change the LED element (12) And a display state of the reflective display element (11).
The device (100) incorporating LED display and reflective display according to claim 1, wherein the reflective display element (11) comprises: a microfluidic display element, an electrowetting display element and/or an electrochromic Display component.
A device (100) incorporating LED display and reflective display according to claim 1, wherein said LED element (12) is connected to a support (13) of a display panel (10), said reflective A display element (11) is disposed between the LED elements (12) and tiled over the support (13) such that an edge of the reflective display element (11) is adjacent to the LED element (12) The edge matches.
A device (100) incorporating LED display and reflective display according to claim 1, wherein said LED element (12) is disposed in said reflective display element (11) and said reflective display The component (11) and the LED component (12) are connected together to a support (13) of the display panel (10).
A device (100) incorporating an LED display and a reflective display according to claim 3 or 4, wherein a portion of the LED element (12) is located at an upper portion of the reflective display element (11) such that A part of the light emitted by the LED element (12) can be irradiated onto the reflective display element (11).
The device (100) of the combination of the LED display and the reflective display according to claim 1, wherein the display panel (10) further comprises:

a circuit board electrically connected to the LED element (12) and the reflective display element (11), and integrated with the support (13);

a protective layer (16) disposed on the support (13) and/or over the LED element (12) and the reflective display element (11) such that the LED The element (12) and the reflective display element (11) are resistant to environmental attack.
The device (100) of the combination of the LED display and the reflective display of claim 1, wherein the device (100) further comprises:

a bracket (14) for encapsulating the display panel (10), the bracket (14) is provided with a plurality of mounting holes (15);

a liner (30) for assembling the bracket (14), the liner (30) including a positioning mechanism for positioning the bracket (14) and a mounting mechanism for mating with the bracket (14) .
The device (100) according to claim 1, characterized in that the control unit (50) sends a control command to the driving unit according to an ambient lighting environment or according to a predetermined instruction ( 40) to:

In a high light environment, the reflective display element (11) is displayed while the LED element (12) is not displayed;

In a low light environment, the reflective display element (11) is not displayed while the LED element (12) is displayed.
A device (100) incorporating LED display and reflective display according to claim 8, wherein said device (100) further comprises a light sensor (20) for said control unit (50) to receive said light The data of the sensor (20) determines the ambient light environment.
A device (100) incorporating LED display and reflective display according to claim 1, wherein said control unit (50) sends a control command to said drive unit (40) for said reflective display element (11) synchronously displaying with the LED element (12) and causing the reflective display element (11) to receive a portion of the light of the illuminated LED element (12).