TW202005471A - LED planar light source device and display - Google Patents

Abstract

A LED (Light Emitting Diode) planar light source device includes at least one first substrate, at least one power transmitting unit and at least one LED module. The first substrate is transparent. The power transmitting unit is connected to one edge of the first substrate and wirelessly transmits at least one AC (Alternating Current) signal with a frequency. The LED module is disposed on one side of the first substrate and includes a power receiving unit, a DC-AC (Direct Current to Alternating Current) converting unit and a plurality of LED units. The power receiving unit receives the AC signal. The AC signal is output from the power receiving unit into the DC-AC converting unit, and the AC signal is converted to a DC power by the DC-AC converting unit. The DC power is provided for the LED units. Therefore, it is beneficial for the LED planar light source device to light from dual sides and flexibly adjust the size thereof.

Description

Light emitting diode plane light source device and display

The invention relates to a LIGHT EMITTING DIODE (LED) planar light source device and display, and in particular to a wirelessly powered luminous diode planar light source device and display.

The light-emitting diode has the advantages of power saving and flexible configuration, so that the light-emitting diode is gradually applied to various electronic devices. In addition, the light-emitting diodes are mostly in the form of point light sources. Therefore, it is necessary to connect a plurality of light-emitting diodes in series to become a planar light source, and the conventional light-emitting diode planar light sources are usually set in an opaque circuit On the board, the planar light source of the light-emitting diode can only face a single light-emitting direction.

However, the single light emitting direction characteristic limits the application range of the light emitting diode planar light source, and the market needs to develop light emitting diode planar light sources of various sizes to be applied to electronic devices or installation spaces of different sizes. The polar body planar light source may be forced to be discarded due to the incompatibility of the new installation space if it is to be changed to other uses.

Therefore, how to promote the flexible and flexible application of light-emitting diode planar light sources has become the focus of development in the market.

The invention provides a light-emitting diode planar light source device and a display, which supply power to the light-emitting diode modules by wireless power supply, thereby facilitating assembly or pivotal connection between the light-emitting diode modules to have light emission on both sides And the application advantages of flexible size adjustment.

According to the present invention, a light emitting diode planar light source device is provided, which includes at least a first substrate, at least a power emitting unit, and at least a light emitting diode module. The first substrate is transparent. The power transmission unit is connected to one side of the first substrate and wirelessly transmits at least one AC signal, and the AC signal has a frequency. The light-emitting diode module is disposed on one side of the first substrate and includes a power receiving unit, an AC-DC conversion unit, and a plurality of light-emitting diode units. The power receiving unit receives the AC signal. The AC signal is output from the power receiving unit to the AC/DC conversion unit, and the AC signal is converted into the DC power by the AC/DC conversion unit. The DC power supply is used to supply the light emitting diode unit. Thereby, the light-emitting diode planar light source device can emit light on both sides.

According to the foregoing light-emitting diode planar light source device, the number of the first substrate may be at least two, and the first substrate is assembled and connected.

According to the foregoing light-emitting diode planar light source device, wherein the number of power emitting units may be at least two and the same as the number of the first substrate, each power emitting unit is connected to the side of the corresponding first substrate, and the power emitting unit Assemble the connection.

According to the foregoing light-emitting diode planar light source device, the light-emitting diode unit can be divided into at least two light groups, each light group has a light color, and the two light colors are different from each other.

According to the foregoing light emitting diode planar light source device, wherein the AC signal emitted by the power emitting unit may be at least two, the two frequencies of the two AC signals are different from each other, and the two light groups respectively correspond to the two AC signals With controlled luminescence.

According to the foregoing light-emitting diode planar light source device, wherein the number of power emitting units may be at least two, the two frequencies of the two power emitting units are different from each other, and the two light groups respectively correspond to the two AC signals to Controlled glow.

According to the foregoing light-emitting diode planar light source device, it may further include at least one second substrate, which is transparent and disposed parallel to the first substrate, and the light-emitting diode module is sandwiched between the first substrate and the second substrate.

According to the foregoing light-emitting diode planar light source device, a part of the light-emitting diode unit may emit light toward the first substrate, and another part of the light-emitting diode unit may emit light away from the first substrate.

With the aforementioned light-emitting diode planar light source device, it is helpful for the light-emitting diode planar light source device to generate a desired luminous color through a simple interface.

According to the present invention, another display is provided, comprising the aforementioned light-emitting diode planar light source device and at least one display film. The display film is disposed on the other surface of the first substrate of the light-emitting diode planar light source device, and the display film receives image signals to display images. In this way, the light-emitting diode planar light source device 100 can be used as a backlight of the display 800.

According to the aforementioned display, a part of the light emitting diode unit may emit light toward the first substrate, and another part of the light emitting diode unit may emit away from the first substrate. In this way, the two sides of the display can have different applications.

100‧‧‧Light emitting diode plane light source device

110‧‧‧The first substrate

120‧‧‧Second substrate

130, 230, 330, 430, 530, 630

135‧‧‧Housing

136、137、138‧‧‧Assembly structure

140‧‧‧Power expansion unit

150, 250, 350, 450, 550, 650‧‧‧ LED module

160‧‧‧Power receiving unit

170‧‧‧AC-DC converter unit

180, 180r, 180g, 180b, 180r1, 180g1, 180b1, 180r2, 180g2, 180b2 ‧‧‧ LED unit

191, 192, 193, 194‧‧‧ color block

800‧‧‧Monitor

809‧‧‧Display film

d1, d2‧‧‧Light direction

FIG. 1 is a schematic diagram of a light-emitting diode planar light source device according to a first embodiment of the present invention; FIG. 2 is a block diagram of a light-emitting diode module of the first embodiment; FIG. 3 is a first embodiment of the invention A schematic view of an example of a light emitting diode module; FIG. 4 shows an enlarged side view of the light emitting diode module in FIG. 3; FIG. 5 shows a schematic view of the power transmitting unit of the first embodiment; FIG. 7 is a schematic diagram of a display according to a second embodiment of the invention; and FIG. 7 is another schematic diagram of a display according to the second embodiment.

Please refer to FIG. 1, which illustrates a schematic diagram of a light emitting diode planar light source device 100 according to a first embodiment of the present invention. As can be seen from FIG. 1, the LED light source device 100 includes a first substrate 110, power emitting units 130, 230, 330, 430, 530, 630 and LED modules 150, 250, 350, 450, 550 , 650. In addition, the light-emitting diode planar light source device according to the present invention may be a visible light source or an invisible light source, wherein the invisible light source may be a far-infrared light source, an ultraviolet light source, etc., and is not limited thereto. In the first embodiment, the light-emitting diode planar light source device 100 is a visible light source.

Please refer to FIG. 2, which illustrates a block diagram of the light emitting diode module 150 of the first embodiment. It can be seen from FIGS. 1 to 2 that the first substrate 110 is transparent. The power transmitting unit 130 is connected to the side (not otherwise labeled) of the first substrate 110 and wirelessly transmits an AC signal, and the AC signal has a frequency. The light emitting diode module 150 is disposed on one side of the first substrate 110 and includes a power receiving unit 160, an AC/DC conversion unit 170, and a plurality of light emitting diode units 180. The power receiving unit 160 receives the AC signal. The AC signal is output from the power receiving unit 160 to the AC/DC conversion unit 170, and the AC signal is converted into the DC power by the AC/DC conversion unit 170. The DC power supply is used to supply the light emitting diode unit 180. Thereby, with respect to the conventional light emitting diode planar light source, there is only a single light emitting direction (such as the light emitting direction d2 in FIG. 1), and the light emitting diode planar light source device 100 according to the present invention has both the light emitting direction d1 and d2, even more light directions. Furthermore, the light-emitting diode planar light source device 100 can be used as a window. The size of the parts in the light-emitting diode module can be small and the connecting wires can be close to fine and transparent. The outward side of the light-emitting diode flat light source device 100 (light emitting Direction d2) The light emission can be used as an advertising billboard, so it cannot be seen that the light emitting diode planar light source device 100 is inward, which can prevent prying eyes from outside.

Further, the power transmitting unit 130 may include an oscillating circuit unit, a power amplifier, a transmitting antenna, etc. (not shown) provided on the circuit board. The circuit board may be a hard board or a flexible board (flexible circuit board). The power supply The transmitting unit 130 may be electrically powered by a battery or a connection room. In addition, the structure of the transmitting antenna may be a coil applied to near-field transmission or an antenna applied to far-field transmission. The frequency and power specifications of the AC signal transmitted by the transmitting antenna may be based on the transmission distance (related to the size of the first substrate 110) Make a better choice. Further, the transmitting antenna may also be a pivoting antenna, that is, the structural shape of the transmitting antenna may be adjusted to achieve suitable frequency, directivity and other specifications. The frequency of the AC signal can be UHF or HF band, and then can be kHz, MHz or GHz level.

Furthermore, the power receiving unit 160 of the light emitting diode module 150 may include a receiving antenna, a filtering unit, etc. (not shown). The receiving antenna receives the AC signal emitted by the transmitting antenna, which can be correspondingly applied to near-field transmission Coils or antennas used for far-field transmission. Specifically, the upper AC-DC conversion unit 170 may be composed of one or more of diodes, transistors, integrated circuits, and passive components to convert the AC signal from the AC-DC conversion unit 170 to a DC power supply to supply the light-emitting diode unit 180.

It can be seen from FIG. 1 that the number of the first substrates can be at least two, and the first substrates are assembled or pivoted for connection. In this way, since the light-emitting diode module on the first substrate does not need to be additionally connected to the outside by a physical power line or use a battery, it helps to adjust the size of the light-emitting diode planar light source device 100 according to the application requirements, and is also exempt from application The inconvenience of replacing the battery in the large-size external wall curtain also helps the LED light source device 100 to be re-assembled into another size and compatible with the new installation space for continued use when it is changed to other uses. Specifically, the number of the first substrates in the first embodiment is six (one of which is the first substrate 110, and the other five are not labeled), and all of the six first substrates have assembly structures (such as grooves and protrusions) Etc., but not limited to this) to assemble or pivot. The light-emitting diode modules 150, 250, 350, 450, 550, and 650 are respectively disposed on one side of the six first substrates and each include a power receiving unit, an AC-DC conversion unit, and a plurality of light-emitting diode units, in which the light-emitting diodes The body modules 150, 250, 350, 450, 550, and 650 may be the same as or different from each other, and their possible specific implementations are described in detail in the following related paragraphs.

The number of power transmission units in the first embodiment may be at least two and the same as the number of the first substrate. Specifically, the number of power transmission units in the first embodiment is six (that is, the power transmission units 130, 230, 330 , 430, 530, 630), and the same number as the first substrate, each power transmitting unit is connected to the side of the corresponding first substrate (for example, in FIG. 1 the power transmitting unit 130 is connected to the side of the first substrate 110) , And the power transmitting units 130, 230, 330, 430, 530, 630 are assembled or hinged to connect, wherein the power transmitting units 130, 230, 330, 430, 530, 630 may be the same as or different from each other, and it is possible Specific implementations are described in the relevant paragraphs below. In addition, in other light emitting diode planar light source devices (not shown) according to the present invention, the number of power emitting units and the number of the first substrate may be a multiple of 2 or may be different.

As shown in FIG. 1, the light-emitting diode planar light source device 100 may further include at least one power expansion unit 140 whose structural shape cooperates with at least one of the power transmission units 130, 230, 330, 430, 530, and 630 for Assembly or pivoting, so the plurality of power expansion units 140 can have different structural shapes to improve the assembly flexibility of the light emitting diode planar light source device 100, and the power expansion unit 140 does not have the function of a power transmission unit.

Please refer to FIG. 3, which illustrates a schematic diagram of the light emitting diode module 150 of the first embodiment. As can be seen from FIG. 3, the light-emitting diode unit 180 is divided into three light groups, each light group has a light color, and the three light colors are different from each other, thereby providing the light-emitting diode planar light source device 100 with light color conversion and combination flexibility. Specifically, the complex light-emitting diode unit 180 is further divided into light-emitting diode units 180r, 180g, and 180b. The light-emitting diode unit 180r belongs to the red light group and its light color is red, and the light-emitting diode unit 180g It belongs to the green light group and its light color is green, and the light emitting diode unit 180b belongs to the blue light group and its light color is blue. In addition, the distribution of red light group, green light group, and blue light group (ie, light-emitting diode units 180r, 180g, and 180b, respectively) is not limited, and the distribution position is not limited. Red light group, green light group, blue light group It can be distributed in three independent blocks, and red light group, green light group, and blue light group can also be staggered (as shown in Figure 3), and then one red light unit 180r, green light group in the red light group One light emitting diode unit 180g in the blue light group, one light emitting diode unit 180b in the blue light group may be closely adjacent to form a light emitting unit group, and further the light emitting diode units 180r, 180g, 180b in the one light emitting unit group may have The assembly structure (such as grooves, protrusions, etc., but not limited to this) is to be assembled or pivoted, so that one light-emitting unit group can pass through the different intensities of the three light colors of the included light-emitting diode units 180r, 180g, 180b Various required colors are formed, and the light-emitting diode module 150 may be composed of a plurality of light-emitting unit groups thereon to form a planar light source of the required color.

Please refer to FIG. 1, the AC signals emitted by the power transmitting unit 130 may be three types, the three AC signals each have a different frequency, and the light emitting diode units 180r, 180g, 180b respectively correspond to the three AC signals to receive Controlled light. For example, the user can avoid designing a more complicated software programming interface, and the simple hardware interface controls the presence or absence of the three AC signals of the power transmitting unit 130 or the size of the transmission power, so that the three AC received by the power receiving unit 160 The signals have different powers, and the AC/DC conversion unit 170 controls the light intensity ratio between the light emitting diode units 180r, 180g, and 180b, so that the light emitting diode module 150 exhibits a desired light emitting color. In addition, the power transmitting unit 130 may use one transmitting antenna to transmit three AC signals of different frequencies, or may use three transmitting antennas to respectively emit three AC signals of different frequencies. The power receiving unit 160 may use one receiving antenna to receive three AC signals of different frequencies, or may use three receiving antennas to receive three AC signals of different frequencies, respectively.

For further example, the power transmission units 130, 230, 330, 430, 530, and 630 each emit three different frequencies of AC signals, and the light-emitting diode modules 150, 250, 350, 450, 550, and 650 each have a red light group. , Green light group, blue light group, light emitting diode modules 150, 250, 350, 450, 550, 650 and power emitting units 130, 230, 330, 430, 530, 630 one-to-one correspondence and controlled light emission.

Please continue to refer to FIG. 1, the light-emitting diode units 180r, 180g, and 180b respectively correspond to the three AC signals, and controlled light emission may be implemented in another manner. For example, the power transmission units 130, 330, and 530 each emit an AC signal of one frequency, and the three frequencies are different. The light emitting diode units 180r, 180g, and 180b correspond to the power transmission units 130, 330, and 530, respectively. The AC signal is controlled to emit light, and the light emitting diode module 150 exhibits a desired light emitting color by the ratio of the light emitting intensity between the light emitting diode units 180r, 180g, and 180b.

For further example, the light-emitting diode modules 150, 250, 350, 450, 550, and 650 each have a red light group, a green light group, and a blue light group, and the light-emitting diode modules 150, 250, 350, 450, 550 All the red light groups in 650 correspond to the AC signal sent by the power emitting unit 130 to emit red light in a controlled manner. All the green light groups in the light-emitting diode modules 150, 250, 350, 450, 550 and 650 are respectively Corresponding to the AC signal emitted by the power emitting unit 330 to emit green light in a controlled manner, all blue light groups in the LED modules 150, 250, 350, 450, 550, and 650 respectively correspond to the AC signal emitted by the power emitting unit 530 The blue light is emitted in a controlled manner, and additional power emitting units 230, 430, and 630 can be added to emit AC signals as needed to assist in adjusting the luminous intensity of the red light group, green light group, or blue light group.

Please refer to FIG. 4, which shows an enlarged side view of the light emitting diode module 150 in FIG. 3. It can be seen from FIGS. 1 and 4 that the light-emitting diode planar light source device 100 may further include at least one second substrate 120, which is transparent and disposed parallel to the first substrate 110, and the light-emitting diode module 150 is sandwiched between Between the first substrate 110 and the second substrate 120, wherein the second substrate 120 can be a transparent hard board, flexible board or thin film, which helps reduce the possibility of damage to the light emitting diode module 150 and can expand its application range . Furthermore, the power emitting unit 130 connects the side of the first substrate 110 and the side of the second substrate 120 (not otherwise labeled). In addition, the light-emitting diode modules 250, 350, 450, 550, and 650 can also be sandwiched between the corresponding first substrate and the corresponding second substrate, respectively, and the second substrates can also be assembled or pivoted with each other. To connect.

Please refer to FIG. 5, which illustrates a schematic diagram of the power transmitting unit 130 of the first embodiment. As can be seen from FIG. 5, the power transmitting unit 130 may further include a housing 135, which houses the circuit board and the oscillating circuit unit, power amplifier, transmitting antenna, etc. (not shown), and the housing 135 includes an assembly structure 136, 137 and 138. Specifically, the assembly structure 136 is a groove and the number is two, and the first substrate 110 and the second substrate 120 can be embedded in the two assembly structures 136 respectively for connection and assembly with the power transmitting unit 130. The assembling structure 137 is a screw hole, and the assembling structure 138 is a screw. The assembling structure 138 and the assembling structure in the form of screw holes on the assembling structure 137 and the power transmitting unit 330 (not shown) can be used to connect the power transmitting units 130 and 330 Assemble or pivot to connect. In addition, the power transmission unit 130, 230, 330, 430, 530, 630 and the power expansion unit 140 can be assembled or pivoted in the manner described in this paragraph, but not limited thereto.

It can be seen from FIG. 4 that the light emitting diode unit 180 can be further divided into light emitting diode units 180r1, 180g1, 180b1, 180r2, 180g2, and 180b2, and a part of the light emitting diode unit 180 (180r1, 180g1, 180b1) emits light. The direction d1 may be toward the first substrate 110 (ie, the light source is emitted from the first substrate 110), and the light emitting direction d2 of another part (180r2, 180g2, 180b2) in the light emitting diode unit 180 may be away from the first substrate 110 (ie, from the second The substrate 120 emits a light source), that is, the light emitting directions d1 and d2 are opposite, so that the two surfaces of the light emitting diode planar light source device 100 have different applications. In other embodiments according to the present invention (not shown in the figure), at least one of the light emitting diode units may emit light on both sides.

Please refer to FIG. 6, which illustrates a schematic diagram of a display 800 according to a second embodiment of the invention. As can be seen from FIG. 6, the display 800 includes the light-emitting diode planar light source device 100 and the display film 809 described in the first embodiment. The display film 809 is disposed on the other surface of the six first substrates of the light emitting diode planar light source device 100 (corresponding to the light emitting direction d1). The display film 809 receives the image signal to display the image. In this way, the light-emitting diode planar light source device 100 can be used as a backlight of the display 800.

Please refer to FIG. 7, which illustrates another schematic diagram of the display 800 of the second embodiment. As can be seen from FIGS. 6 and 7, specifically, a part of the light emitting diode unit 180 can emit light in a direction d1 toward the first substrate (that is, emit light sources from six first substrates), as shown in FIG. 6, And the red light group, green light group and blue light group are densely and staggeredly distributed and have the same luminous intensity, and the whole is regarded as the white luminous color. The light emitting direction d2 of the other part of the light emitting diode unit 180 can be away from the first substrate (that is, the light sources are emitted from six second substrates), as shown in FIG. 7, and the red light group, green light group, and blue light group are dense The staggered distribution and the luminous intensity can be different, the whole is regarded as a single uniform desired luminous color. In this way, the display 800 can be applied as a window, and the outward side of the display 800 (lighting direction d2) can be used as an advertising billboard, so it can not be seen inward of the display 800, which can prevent outside personnel from peeping. A display film 809 is provided on one side (emission direction d1) and can receive image signals to display images, so that the display 800 has a TV function.

Furthermore, as shown in FIG. 7, the outward side of the display 800 (emission direction d2) can be further divided into color blocks 191, 192, 193, and 194. The color block 191 includes a first red light group and a first green light. The light group, the first blue light group, and the color block 191 are controlled by the first set of three different frequency AC signals. The color block 192 includes a second red light group, a second green light group, and a second blue light group. The color block 192 is controlled by a second set of three different frequency AC signals. The color block 193 includes a third red light group, a third green light group, and a third blue light group. The color block 193 is controlled by a third set of three different frequency AC signals. The color block 194 includes a fourth red light group, a fourth green light group, and a fourth blue light group. The color block 194 is controlled by the fourth group of AC signals of three different frequencies. In this way, the color blocks 191, 192, 193, and 194 are respectively controlled by four sets of AC signals to generate four different light-emitting colors, and the power transmission unit can be controlled through a simple interface to make the color blocks 191, 192, and 193. 194 are different from each other and change at any time, thereby increasing the richness and variability of the color of the advertising kanban. The number of color blocks and patterns are not limited to this.

Although the present invention has been disclosed as above in the embodiments, it is not intended to limit the present invention. Any person who is familiar with this art can make various changes and modifications within the spirit and scope of the present invention, so the protection of the present invention The scope shall be determined by the scope of the attached patent application.

100‧‧‧Light emitting diode plane light source device

110‧‧‧The first substrate

120‧‧‧Second substrate

130, 230, 330, 430, 530, 630

140‧‧‧Power expansion unit

150, 250, 350, 450, 550, 650‧‧‧ LED module

160‧‧‧Power receiving unit

170‧‧‧AC-DC converter unit

180‧‧‧ LED unit

d1, d2‧‧‧Light direction

Claims (10)

A light-emitting diode planar light source device includes: at least a first substrate, which is transparent; at least a power emitting unit, which is connected to one side of the first substrate and wirelessly transmits at least one AC signal, the AC signal Has a frequency; and at least one light-emitting diode module, which is disposed on one side of the first substrate and includes: a power receiving unit that receives the AC signal; an AC/DC conversion unit that receives the AC signal from the power source The unit is output to the AC-DC conversion unit, and the AC signal is converted from the AC-DC conversion unit to a DC power supply; and a plurality of light-emitting diode units, the DC power supply is used to supply the light-emitting diode units. The light emitting diode planar light source device as described in item 1 of the patent application range, wherein the number of the first substrates is at least two, and the first substrates are assembled and connected. The light-emitting diode planar light source device as described in item 2 of the patent application range, wherein the number of the power emitting units is at least two and is the same as the number of the first substrate, and each of the power emitting units is connected to the corresponding first substrate And the power transmitting units are assembled and connected. The light-emitting diode planar light source device as described in item 1 of the patent application range, wherein the light-emitting diode units are divided into at least two light groups, each of the two light groups has a light color, and the two light colors are not mutually the same. The light emitting diode planar light source device as described in item 4 of the patent application range, wherein the AC signal emitted by the power transmitting unit is at least two, the two frequencies of the two AC signals are different from each other, and the two light groups are respectively There should be two AC signals to control the light emission. The light emitting diode planar light source device as described in item 4 of the patent application scope, wherein the number of the power emitting units is at least two, the two frequencies of the two power emitting units are different from each other, and the two light groups correspond to the two The AC signal emits light in a controlled manner. The light-emitting diode planar light source device as described in item 1 of the patent application scope further comprises: at least a second substrate which is transparent and arranged parallel to the first substrate, and the light-emitting diode module is sandwiched between the Between the first substrate and the second substrate. The light-emitting diode planar light source device as described in item 1 of the patent application range, wherein the light-emitting direction of some of the light-emitting diode units is directed to the first substrate, and the light-emitting direction of the other part of the light-emitting diode units Away from the first substrate. A display comprising: the light-emitting diode planar light source device as described in item 1 of the patent scope; and at least one display film provided on the other side of the first substrate of the light-emitting diode planar light source device, the The display film receives an image signal to display an image. The display according to item 9 of the patent application scope, wherein a part of the light emitting diode units emit light toward the first substrate, and another part of the light emitting diode units emit light away from the first substrate.

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