TWI775116B - LED display device - Google Patents

Abstract

An LED display device has: a plurality of cascaded display modules, each of which has a plurality of LED display units in a cascade configuration, wherein a first unit of the LED display units receives an input through a composite connection interface DC voltage and a display signal, and any preceding LED display unit among the LED display units is electrically connected to a succeeding LED display unit through a composite connection interface, so that each LED display unit obtains the input Power supply of DC voltage and receiving the display signal, and obtain corresponding display data from the display signal to drive an LED module in each LED display unit; wherein, each LED display unit uses a timing controller to receive and transmit the A display signal, and a scan signal and a pixel voltage are generated according to the display signal to respectively provide a row driver and a column driver inside the display signal to drive the LED module.

Description

LED display device

The present invention relates to a display device, especially a highly integrated thin LED display device.

Please refer to FIG. 1 , which shows a block diagram of a conventional LED TV. Referring to FIG. 1 , a conventional LED TV 10 includes a power module 11 , a video receiving card 12 , a timing control unit 13 , a row driving circuit 14 , a column driving circuit 15 and an LED array 16 .

The power module 11 is used for generating DC voltages V ₁ , V ₂ , V ₃ and V ₄ according to an AC voltage AC to supply power to the video receiving card 12 , the timing control unit 13 , the row driving circuit 14 and the column driving circuit 15 respectively.

The video receiving card 12 is used to receive a video signal _SV through a USB interface or a WiFi interface and transmit it to the timing control unit 13 .

The timing control unit 13 is used for generating the scan signal S _SCAN and the gray scale signal S _GL according to the video signal S _V .

The row driving circuit 14 is used to turn on the LED array 16 row by row according to the control of the scan signal S _SCAN .

The column driving circuit 15 is used for generating driving voltages for pixels in each row according to the gray-scale signal S _GL corresponding to the scanning signal S _SCAN to drive the active LED array 16 to generate a picture.

However, since the power module 11 and the video receiving card 12 have relatively large volumes, the conventional LED TV 10 needs a box to accommodate the power module 11 and the video receiving card 12, which is not conducive to the thinning of the LED TV.

As can be seen from the above description, a novel LED display device is urgently needed in the art.

One object of the present invention is to provide an LED display device, which can transmit an input DC voltage and a video signal through a composite connection interface to save a power module and a video receiving card, thereby optimizing the overall appearance of the LED display device thickness.

Another object of the present invention is to provide an LED display device, which can realize the size expansion of the LED display device by arranging a timing controller, a row driver and a column driver in each LED display unit of the LED display device sex.

Another object of the present invention is to provide an LED display device, which can meet the narrow border requirements of the LED display device by arranging a timing controller, a row driver and a column driver in each LED display unit of the LED display device. or borderless requirements.

In order to achieve the above object, an LED display device is proposed, which has:

a substrate; and

A plurality of cascaded display modules located on the substrate, each of the cascaded display modules has a plurality of LED display units in a cascade configuration, wherein a first unit of the LED display units passes through a The composite connection interface receives an input DC voltage and a video signal, and any one of the preceding LED display units among the LED display units is electrically connected to a succeeding LED display unit through the composite connection interface connected, so that each of the LED display units obtains the power supply of the input DC voltage and receives the video signal, and obtains corresponding grayscale data from the video signal to drive an LED module in each of the LED display units ;

Wherein, each of the LED display units has a timing controller, a row driver and a column driver. The timing controller is used to receive and transmit the video signal, and to generate a scan signal and a grayscale signal according to the video signal to It is respectively provided to the row driver and the column driver to drive the LED module to display a picture.

In a possible embodiment, each of the column drivers is a common anode column driver or a common cathode column driver.

In one embodiment, the composite connection interface includes a power interface and a multimedia interface, and the multimedia interface may be a high-definition multimedia interface (HDMI), a VGA interface, a color-difference terminal interface, or a An AV terminal interface, wherein the power interface is used for transmitting the input DC voltage, and the multimedia interface is used for transmitting the video signal.

In one embodiment, each of the LED display units has a power conversion circuit to convert the input DC voltage into at least a DC power supply voltage for supplying power to the timing controller, the row driver and the column driver.

In one embodiment, the LED display device further has a multimedia data receiving unit, and the multimedia data receiving unit has a plurality of the composite connection interfaces to be coupled with the plurality of cascaded display modules, so as to provide the input DC voltage and the video signal of each of the cascaded display modules

In one embodiment, the multimedia data receiving unit has an AC-DC conversion circuit to convert an AC power source into the input DC voltage.

In one embodiment, the multimedia data receiving unit has the timing controller to generate the video signals required by the cascaded display modules according to an input video signal.

In one embodiment, the multimedia data receiving unit has a multimedia processing unit for receiving an input video signal and generating the input video signal according to the input video signal.

In one embodiment, the multimedia data receiving unit has a wired communication interface to receive the input video and audio signal from a storage device.

In one embodiment, the multimedia data receiving unit has a wireless communication interface for receiving the input video and audio signal from an information processing device.

In order to enable your examiners to further understand the structure, characteristics, purpose, and advantages of the present invention, drawings and detailed descriptions of preferred embodiments are attached as follows.

The principle of the present invention is:

(1) A composite connection interface is used to transmit an input DC voltage and a video signal between any two adjacent LED display units in each cascaded LED display module of an LED display device, so that an LED display The device can omit a power module and a video receiving card, thereby optimizing the overall thickness of the LED display device; and

(2) A timing controller, a row driver and a column driver are arranged in each LED display unit to make the screen size of the LED display device expandable, and to enable the LED display device to meet the requirements of narrow borders or no borders .

Please refer to FIG. 2 , which shows a block diagram of an embodiment of the LED display device of the present invention. As shown in FIG. 2, an LED display device 100 has a substrate 100a, a plurality of cascaded display modules 110 on the substrate 100a, and a multimedia data receiving unit 120, wherein the multimedia data receiving unit 120 is used for communicating according to a The voltage AC generates an input DC voltage and receives an input video signal S _AV , and generates each video signal S _V required by the cascaded display modules 110 according to the input video signal S _AV .

Each cascaded display module 110 has a plurality of LED display units 111 in a cascade configuration, wherein a first unit of the LED display units 111 receives the data provided by the multimedia data receiving unit 120 through a composite connection interface An input DC voltage V _IN and a video signal S _V , and any preceding LED display unit 111 among the LED display units 111 is electrically connected to a succeeding LED display unit 111 through a composite connection interface , so that each LED display unit 111 obtains the power supply of the input DC voltage V _IN and receives the video signal S _V , and obtains corresponding grayscale data from the video signal S _V to drive one of the LED display units 111 LED modules.

Please refer to FIG. 3 , which shows a block diagram of an embodiment of the LED display unit 111 of the LED display device of FIG. 2 . As shown in FIG. 3, the LED display unit 111 has a composite connection interface 111a, a power conversion circuit 111b, a timing controller 111c, a row driver 111d, a column driver 111e, an LED module 111f and a composite connection interface 111g.

The composite connection interface 111a is used for receiving an input DC voltage V _IN and a video signal S _V provided by the multimedia data receiving unit 120 .

The power conversion circuit 111b is used to convert the input DC voltage V _IN into DC supply voltages V ₁ , V ₂ , V ₃ to supply power to the timing controller 111 c , the row driver 111 d and the column driver 111 e respectively.

The timing controller 111c is used for receiving the video signal S _V and transmitting the video signal S _V to a subsequent LED display unit 111 through the composite connection interface 111g, and generating a scanning signal S _SCAN and a gray scale according to the video signal S _V The signal S _GL is respectively provided to the row driver 111d and the column driver 111e to drive the LED module 111f to display a picture.

The row driver 111d is used to turn on the LED modules 111f row by row according to the control of the scan signal S _SCAN .

The column driver 111e is used for generating the driving current of each row of pixels according to the gray-scale signal S _GL corresponding to the scanning signal S _SCAN , so as to drive the LED module 111 f to generate a picture.

The LED module 111f is an LED array having a plurality of LEDs and each LED determines its brightness (gray scale) according to the driving current.

In addition, the column driver 111e can be a common-anode column driver or a common-cathode column driver, that is, when the LED module 111f is a common-anode LED module, the column driver 111e can be a common-anode column driver; When the module 111f is a common cathode type LED module, the column driver 111e can be a common cathode type column driver.

In addition, the composite connection interfaces 111a and 111g each include a power interface and a video signal interface, wherein the power interface is used for transmitting the input DC voltage V _IN , the video signal interface is used for transmitting the video signal S _V , and The video signal interface can be a high definition multimedia interface (HDMI), a VGA interface, a component interface or an AV interface.

Please refer to FIG. 4 , which is a block diagram of an embodiment of the multimedia data receiving unit 120 of the LED display device of FIG. 2 . As shown in FIG. 4 , the multimedia data receiving unit 120 has a plurality of composite connection interfaces 120 a , an AC-DC converting circuit 121 , a timing controller 122 and a multimedia processing unit 123 .

The composite connection interfaces 120a are used for coupling with a plurality of cascaded display modules 110 to provide the input DC voltage V _IN and the video signal S _V of the cascaded display modules 110 .

The AC-DC conversion circuit 121 is used to convert an AC power source AC into an input DC voltage V _IN .

The timing controller 122 is used for generating each video signal S _V required by the cascaded display modules 110 according to an input video signal S _VI .

The multimedia processing unit 123 is used for receiving an input video signal S _AV and transmitting the input video signal S _VI contained in the input video signal S _AV to the timing controller 122 .

In addition, the multimedia data receiving unit 120 may have a wired communication interface, such as a USB (universal serial bus; universal serial bus) interface, a PCI (peripheral component interconnect; peripheral component interconnect) interface, and a PCI-E (peripheral component interconnect express) interface ; Peripheral Component Fast Interconnect) interface or Thunderbolt (Thunderbolt) interface to receive input video and audio signals S _AV from a storage device. Accordingly, the LED display device 100 can play a multimedia file stored in the storage device.

In addition, the multimedia data receiving unit 120 may have a wireless interface, such as a WiFi interface, a Bluetooth interface or a Zigbee interface, to receive the input video and audio signal S _AV from an information processing device. Accordingly, the LED display device 100 can play a multimedia file provided by the information processing device, wherein the multimedia file can be stored in a memory in the information processing device, or the information processing device can pass through a network obtained files.

Thus, the above has completely and clearly explained the LED display device of the present invention; and, from the above, it can be known that the present invention has the following advantages:

(1) The LED display device of the present invention can transmit an input DC voltage and a video signal through a composite connection interface to save a power module and a video receiving card, and in some embodiments, the HUB and switch can also be omitted power module, thereby optimizing the overall thickness of the LED display device.

(2) The LED display device of the present invention does not need a video sending card and a receiving card, which can greatly reduce the cost.

(3) The LED display device of the present invention can be quickly installed and used without debugging, and has no use threshold.

(4) The LED display device of the present invention does not need an additional box, and the module is the box.

(5) The LED display device of the present invention can realize the size expandability of the LED display device by arranging a timing controller, a row driver and a column driver in each LED display unit of the LED display device.

(6) In the LED display device of the present invention, a timing controller, a row driver and a column driver can be arranged in each LED display unit of the LED display device, so that the LED display device can meet the requirements of narrow frame or no frame. .

It must be emphasized that the above-mentioned disclosure in this case is a preferred embodiment, and any partial changes or modifications originating from the technical ideas of this case and easily inferred by those who are familiar with the art are within the scope of the patent of this case. category of rights.

To sum up, regardless of the purpose, means and effect of this case, it shows that it is completely different from the conventional technology, and its first invention is suitable for practical use, and indeed meets the patent requirements of the invention. Society is to pray for the best.

10: Known LED TV

11: Power Module

12: Video receiving card

13: Timing control unit

14: Row driver circuit

15: Column driver circuit

16: LED array

100: LED display device

100a: Substrate

110: Cascading Display Modules

111: LED display unit

111a: Composite connection interface

111b: Power Conversion Circuits

111c: Timing Controller

111d: row driver

111e: Column driver

111f: LED module

111g: Composite connection interface

120: Multimedia data receiving unit

120a: Composite Connection Interface

121: AC-DC conversion circuit

122: Timing Controller

123: Multimedia processing unit

FIG. 1 shows a block diagram of a conventional LED TV; FIG. 2 is a block diagram illustrating an embodiment of the LED display device of the present invention; 3 is a block diagram illustrating an embodiment of an LED display unit of the LED display device of FIG. 2; and FIG. 4 is a block diagram illustrating an embodiment of the multimedia data receiving unit of the LED display device of FIG. 2 .

100: LED display device

100a: Substrate

110: Cascading Display Modules

111: LED display unit

120: Multimedia data receiving unit

Claims (9)

An LED display device has: a substrate; a plurality of cascaded display modules located on the substrate, each of the cascaded display modules has a plurality of LED display units in a cascaded configuration, wherein the LEDs A first unit of the display units receives an input DC voltage and a video signal through a composite connection interface, and any preceding LED display unit of the LED display units communicates with an on-board display unit through the composite connection interface. The rear LED display units are electrically connected, so that each of the LED display units obtains the power supply of the input DC voltage and receives the video signal, and obtains corresponding grayscale data from the video signal to drive each of the LED display units. an LED module inside; and a multimedia data receiving unit, the multimedia data receiving unit has a plurality of the composite connection interfaces to be coupled with the plurality of cascaded display modules, so as to provide each of the cascaded displays The module inputs the DC voltage and the video signal; wherein, each of the LED display units has a timing controller, a row driver and a column driver, and the timing controller is used for receiving and transmitting the video signal, and according to the video The signal generates a scan signal and a grayscale signal, which are respectively provided to the row driver and the column driver to drive the LED module to display a picture. The LED display device according to claim 1, wherein each of the column drivers is a common anode column driver or a common cathode column driver. The LED display device of claim 1, wherein the composite connection interface includes a power interface and a video signal interface, wherein the power interface is used for transmitting the input DC voltage, and the video signal interface is used for transmit the video signal. The LED display device according to claim 3, wherein each of the LED display units has a power conversion circuit to convert the input DC voltage into at least a DC power supply voltage for supplying power to the timing controller, the row driver and the column drive. The LED display device of claim 1, wherein the multimedia data receiving unit has an AC-DC conversion circuit to convert an AC power source into the input DC voltage. The LED display device of claim 1, wherein the multimedia data receiving unit has the timing controller to generate the video signals required by the cascaded display modules according to an input video signal. The LED display device of claim 6, wherein the multimedia data receiving unit has a multimedia processing unit for receiving an input video signal and generating the input video signal according to the input video signal. The LED display device of claim 7, wherein the multimedia data receiving unit has a wired communication interface to receive the input video and audio signal from a storage device. The LED display device of claim 7, wherein the multimedia data receiving unit has a wireless communication interface for receiving the input video and audio signal from an information processing device.

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