KR20130142653A - Electronic paper display with high performance speaker function - Google Patents

Abstract

The present invention relates to an electronic paper display device having a speaker function so that an electronic paper itself can perform the speaker function without a separate speaker by combining a solid vibration module (piezoelectric module) and the electronic paper. The device of the present invention comprises an electronic paper sheet which displays a picture, a piezoelectric module which contacts the electronic paper sheet so that the electronic paper sheet can generate the sound without the separate speaker, a piezoelectric driving unit which receives an input of an audio signal to drive the piezoelectric module, an electronic paper driving unit which receives an input of a video signal to drive the electronic paper, and a frame which supports the electronic paper sheet, wherein the piezoelectric module may be attached to a lower plate of the electronic paper sheet or to the frame. The electronic paper display device having a speaker function according to the present invention can provide the audio-visual characteristics without an external speaker by combining the electronic paper with the bone conduction speaker technology, thereby advantageously reducing the manufacturing cost along with having a thin profile by reducing the size of the electronic paper display device.

Description

ELECTRONIC PAPER DISPLAY WITH HIGH PERFORMANCE SPEAKER FUNCTION}

The present invention relates to an electronic paper display device having a speaker function that combines a solid vibration module (piezoelectric module) and an electronic paper so that the electronic paper itself functions as a speaker without a separate speaker.

In general, electronic paper is a kind of reflective flexible display, which has high readability, wide viewing angle, and high contrast ratio between bright white background and black particles like conventional paper and ink. This maintained bistable characteristic minimizes power loss. Such electronic paper is a new display element that replaces paper printed matter and existing display media, and various applications such as electronic newspapers, e-books, and advertisement billboards are expected.

E-Ink's microcapsules and Sipix's microcups provide electrophoresis, Gyricon's twist ball, and Bridgestone's QR-LPD (Quick Response Liquid Powder Display). The electrophoretic method using the microcapsules is known to be the best.

As shown in FIG. 1, the electrophoretic electronic paper using the microcapsules includes a transparent fluid 16, a positively charged white particulate 12, and a negative charge in a transparent microcapsule 10 having a diameter of about 200 μm to 300 μm. To disperse the black fine particles 14 and to position the microcapsules 10 between the upper and lower transparent electrodes 22 and 24 and to display black or white depending on the direction of the electric field applied to the electrodes 22 and 24. It is.

Since a display device such as an electronic paper requires a separate micro speaker to provide audiovisual characteristics, the size of the product increases and the manufacturing cost increases.

The present invention has been proposed to solve the above problems, an object of the present invention is to combine the solid-state vibration module (piezoelectric module) and electronic paper based on the bone conduction speaker technology can provide audio-visual characteristics without a separate external speaker The present invention provides an electronic paper display device.

In order to achieve the above object, the device of the present invention comprises an electronic paper sheet for displaying an image, and a piezoelectric module that is in close contact with the electronic paper sheet so that the electronic paper sheet generates sound without a separate speaker. do. The electronic paper display device further includes a piezoelectric driver for driving the piezoelectric module by receiving an audio signal, an electronic paper driver for driving the electronic paper by receiving a video signal, and a frame supporting the electronic paper sheet. The piezoelectric module may be attached to the lower plate or the frame of the electronic paper sheet.

The electronic paper sheet is any one of an electrophoretic method using a microcapsule or a microcup, a method using a twist ball, a method using a QR-LPD (Quick Response Liquid Powder Display), and an electrowetting method. The piezoelectric module is manufactured in such a manner that the piezoelectric module is in close contact with the electronic paper sheet for supporting vibration, a lower electrode, an upper electrode, and a piezoelectric vibration vibrating according to a voltage applied between the lower electrode and the upper electrode. An element and a housing for accommodating these parts, the driving signal transmitted from the piezoelectric drive part is applied between the lower electrode and the upper electrode to vibrate the piezoelectric element, and the vibration of the piezoelectric element provides the support means. The electronic paper sheet is transferred to the electronic paper sheet and configured to generate sound.

In addition, an apparatus according to another embodiment of the present invention comprises an electronic paper sheet for displaying an image; A piezoelectric module attached to the electronic paper sheet for vibrating the electronic paper sheet; An edge for adjusting acoustic characteristics while supporting the electronic paper sheet in a frame; And a frame for supporting the electronic paper sheet connected to the edge, wherein the edge has a material having a rigidity different from that of the electronic paper sheet or a pattern having a predetermined shape.

In addition, an apparatus according to another embodiment of the present invention includes a first electronic paper sheet for displaying an image; A second electronic paper sheet for displaying an image; A first piezoelectric module for driving the first electronic paper sheet; A second piezoelectric module for driving the second electronic paper sheet; And a frame for separating and accommodating the first electronic paper sheet and the second electronic paper sheet, and supporting each electronic paper sheet to have a split screen and stereo characteristics.

And an apparatus according to another embodiment of the present invention comprises an electronic paper driver for driving one electronic paper sheet in accordance with a video signal; An electronic paper sheet displaying an image of a video signal according to the driving of the electronic paper driving unit; At least two piezoelectric driving units for driving at least two piezoelectric modules in accordance with one audio signal; At least two places are distributed and attached to one electronic paper sheet, each of which includes at least two piezoelectric modules vibrated by the at least two piezoelectric actuators to vibrate the one electronic paper sheet It is characterized by driving the paper sheet in multiple points.

Electronic paper display device having a speaker function according to the present invention can combine the electronic paper and bone conduction speaker technology to provide audio and visual characteristics without a separate external speaker, thereby reducing the size of the electronic paper display to enable a thin There is an advantage to reduce the manufacturing cost.

In addition, the electronic paper display device having the speaker function of the present invention can be applied to a large display by driving one electronic paper sheet in multiple points, and can provide a multi-screen and stereo function by dividing the electronic paper display screen.

1 is a schematic diagram showing the electrophoresis of the electrophoresis method using a microcapsule,
FIG. 2 is a block diagram showing an overall configuration of an electronic paper display apparatus having a speaker function according to a first embodiment of the present invention;
3 is an exploded perspective view illustrating an electronic paper display device having a speaker function according to a first embodiment of the present invention;
4 is a perspective view showing an electronic paper display device having a speaker function according to a first embodiment of the present invention;
FIG. 5 is a side cross-sectional view of the electronic paper display device having the speaker function shown in FIG. 4;
6 is an exploded perspective view showing an electronic paper display device having a speaker function according to a second embodiment of the present invention;
7 is a perspective view illustrating an electronic paper display device having a speaker function according to a second embodiment of the present invention;
8 is a side cross-sectional view of the electronic paper display device having the speaker function shown in FIG. 7;
9 is a perspective view illustrating an electronic paper display device having a speaker function according to a third embodiment of the present invention;
FIG. 10 is a block diagram showing an overall configuration of an electronic paper display apparatus having a speaker function according to a third embodiment of the present invention;
11 is a perspective view illustrating an electronic paper display apparatus having a speaker function according to a fourth embodiment of the present invention;
FIG. 12 is a block diagram illustrating an overall configuration of an electronic paper display apparatus having a speaker function according to a fourth embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings. The following examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention.

First Embodiment

FIG. 2 is a block diagram illustrating an overall configuration of an electronic paper display apparatus having a speaker function according to a first embodiment of the present invention.

As shown in FIG. 2, the electronic paper display apparatus 100 having a speaker function according to the first embodiment of the present invention includes a power supply unit 102 and an electronic paper driver for driving an electronic paper by receiving a video signal. 104, a piezoelectric driver 106 for receiving an audio signal and driving the piezoelectric module, and a piezoelectric module 120 for driving the electronic paper sheet 110 according to the signal of the piezoelectric driver 106 to generate sound. And an electronic paper sheet 110 for generating sound waves according to the vibration of the piezoelectric module 120 while displaying an image according to the driving of the electronic paper driving unit 104.

Referring to FIG. 2, the power supply unit 102 charges a battery (not shown) with a DC power input through a DC IN terminal, receives a charging voltage from the battery, and receives the electronic paper sheet 110 and the piezoelectric module 120. The piezoelectric drive unit 106 drives the piezoelectric module 120 with an audio signal input through the AUDIO IN terminal, and the electronic paper drive unit 104 supplies a video signal for displaying an image. Accordingly, a driving voltage is applied to the pixel electrode of the electronic paper sheet 110 to display a still image or a quasi-dynamic image.

The piezoelectric module 120 is in close contact with the substrate or frame of the electronic paper sheet 110 and vibrates the electronic paper sheet 110 according to an audio signal, thereby causing the electronic paper display apparatus 100 to generate sound without a separate external speaker. To have characteristics.

The electronic paper display apparatus 100 may be adopted and used in various application products. In the case of an application product such as an electronic wallpaper using the flexible characteristics of the electronic paper, the electronic paper display apparatus 100 may be used alone, It may be used in combination with a main body having a communication unit for storing an audio signal and a video signal, receiving a user's manipulation signal, and communicating with an external device.

FIG. 3 is an exploded perspective view illustrating an electronic paper display apparatus having a speaker function according to a first embodiment of the present invention, and FIG. 4 illustrates an electronic paper display apparatus having a speaker function according to a first embodiment of the present invention. 5 is a perspective view of the combination, and FIG. 5 is a side cross-sectional view of the electronic paper display apparatus having the speaker function shown in FIG. 4.

Electronic paper display apparatus 100 having a speaker function according to a first embodiment of the present invention, as shown in Figures 3 to 5, the main body 130 having a frame and the electronic paper sheet 110 and the electronic paper sheet It consists of a piezoelectric module 120 attached to the substrate or frame of (110). In the drawing of the first embodiment, the piezoelectric module 120 is simply shown as being directly attached to the lower substrate of the electronic paper sheet 110, but in the case of the actual product, a receiving space may be formed in a part of the frame so as not to be exposed to the outside. .

3 to 5, the electronic paper sheet 110 may be implemented in various ways. In the case of the microcapsule type, as shown in FIG. 5, the lower transparent electrode 112 corresponding to the pixel is formed on the lower portion Between the substrate 111 and the upper substrate 115 on which the upper transparent electrode 114 is formed, a plurality of microcapsules 113 including color fine particles 113b and 113c having a charge and a fluid 113a are positioned. The pixel is displayed in a predetermined color according to the electric field applied between the lower transparent electrode 112 and the upper transparent electrode 114. In the first embodiment, the microcapsule method is taken as an example, but the present invention may be similarly applied to the electronic paper sheet 110 of various other methods.

As shown in FIG. 5, the piezoelectric module 120 is in contact with the electronic paper sheet 110 to support the vibration 121 and the substrate 120 to transmit vibrations, the lower electrode 123, and the piezoelectric element 124. And the upper electrode 125 and the housing 127 for accommodating the same, thereby vibrating the piezoelectric element 124 by applying a driving signal transmitted from the piezoelectric driver 106 to the lower electrode 123 and the upper electrode 125. In addition, the vibration of the piezoelectric element 124 is transmitted to the electronic paper sheet 110 through the support substrate 122 and the support 121, so that the electronic paper sheet 110 generates sound. In this case, the upper electrode 125 is fixed to the housing 127 by the epoxy 126. And by adjusting the frequency characteristics of the sound according to the shape of the enclosed space formed by the support 121 and the support substrate 122 and the housing 127 formed of a high quality without distortion over the entire band from low to high Sound can be generated.

The electronic paper display device 100 according to the first embodiment of the present invention can charge a built-in battery with a DC power input through a DC IN terminal, and can be used while being portable by operating as a battery power source. In particular, the power consumption is small due to the characteristics of electronic paper, so it can be used for a long time.

When a video signal is input through the video input terminal (Video IN), and an audio signal is input through the audio input terminal (Audio IN), the electronic paper driver 104 generates a pixel electrode of the electronic paper sheet 110 according to the video signal. The electronic paper sheet 110 displays an image by applying a voltage to the 112, and the piezoelectric driver 106 drives the piezoelectric module 120 in close contact with the electronic paper sheet 110 according to the audio signal. The seat 110 generates sound without a separate speaker.

Second Embodiment

FIG. 6 is an exploded perspective view illustrating an electronic paper display device having a speaker function according to a second embodiment of the present invention, FIG. 7 is a combined perspective view of the electronic paper display device having a speaker function shown in FIG. 6, and FIG. 8. 6 is a side cross-sectional view of an electronic paper display device having a speaker function shown in FIG.

Unlike the first embodiment, the electronic paper display apparatus 200 having the speaker function according to the second embodiment of the present invention has an edge 240 having a material or shape different in rigidity between the frame 230 and the electronic paper sheet 210. ) To improve acoustic characteristics.

As shown in FIGS. 6 and 7, the electronic paper display apparatus 200 having the speaker function according to the second exemplary embodiment of the present invention is attached to the electronic paper sheet 210 and the electronic paper sheet 210 to be electronic. Piezoelectric module 220 for vibrating paper sheet 210, edge 240 for adjusting acoustic characteristics while supporting electronic paper sheet 210 on frame 230, and electronic paper connected to edge 240 It consists of a frame 230 for supporting the seat 210.

6 to 8, the electronic paper sheet 210 is an electrophoretic method using a microcapsule or a microcup, a method using a twist ball, a method using a QR-LPD (Quick Response Liquid Powder Display). , Which is manufactured by one of the methods of electrowetting and displays images such as text, graphics or quasi-video according to the video signal (Nideo IN) as in the first embodiment.

The piezoelectric module 220 is made of a piezoelectric member according to an audio signal including a support means for being in close contact with the electronic paper sheet 210 to transmit vibrations, a lower electrode, a piezoelectric element, an upper electrode, and a housing for accommodating them, as in the first embodiment. Vibrating the device causes the electronic paper sheet 210 to generate sound.

Frame 230 is a mechanical configuration for supporting the electronic paper sheet 210 may be made in a variety of shapes according to the application, the edge 240 is made of a material having a different rigidity from the electronic paper sheet 210 or grooved By forming a pattern or the like to change the vibration characteristics of the electronic paper sheet to improve the acoustic characteristics, particularly in the low frequency band.

In the electronic paper display device 200 according to the second embodiment of the present invention, when a video signal is input through a video input terminal (Video IN) and an audio signal is input through an audio input terminal (Audio IN), The paper driving unit applies a voltage to the pixel electrode of the electronic paper sheet 210 according to the video signal so that the electronic paper sheet 210 displays an image, and the piezoelectric driving unit is in close contact with the electronic paper sheet 210 according to the audio signal. By driving the piezoelectric module 220, the electronic paper sheet 210 generates sound without a separate speaker.

Third Embodiment

FIG. 9 is a perspective view illustrating an electronic paper display apparatus having a speaker function according to a third embodiment of the present invention, and FIG. 10 is a block diagram illustrating the entire configuration of the electronic paper display apparatus having a speaker function according to a third embodiment of the present invention. It is also. The third embodiment of the present invention displays two images by driving two screens in which the electronic paper sheet 310 is divided into two regions 310-1 and 310-2, respectively, and displays two electronic paper sheets 310. The piezoelectric modules 320-1 and 320-2 are attached to the -1,310-2 to have a stereo function. As a modification of the third embodiment, one video signal may be applied to the first electronic paper sheet 310-1 and the second electronic paper sheet 310-2 to display one image at twice the size.

As shown in FIGS. 9 and 10, the electronic paper display apparatus 300 having the speaker function according to the third embodiment of the present invention has a first electronic paper sheet 310-according to the first video signal Video 1. 1) first electronic paper driver 302-1 for driving 1) and first electronic paper sheet 310-1 for displaying an image of the first video signal according to the driving of the first electronic paper driver 302-1; ), The first piezoelectric driver 304-1 for driving the first piezoelectric module 320-1 according to the first audio signal Audio 1, and the first piezoelectric driver 304-1 according to the driving of the first piezoelectric module 320-1. The first piezoelectric module 320-1 which vibrates the first electronic paper sheet 310-1 to generate sound, and the second electronic paper sheet 310-2 are driven according to the second video signal Video 2. A second electronic paper driver 302-2, a second electronic paper sheet 310-2 for displaying an image of a second video signal according to the driving of the second electronic paper driver 302-2, and 2 Depending on the audio signal (Audio 2) D. Vibrating the second electronic paper sheet 310-2 according to the driving of the second piezoelectric driving unit 304-2 and the second piezoelectric driving unit 304-2 for driving the second piezoelectric module 320-2. To separate and accommodate the second piezoelectric module 320-2, the first electronic paper sheet 310-1 and the second electronic paper sheet 310-2, and to support each electronic paper sheet. Frame 330 may provide a split screen and stereo characteristics.

9 and 10, the electronic paper sheets 310-1 and 310-2 and the piezoelectric modules 320-1 and 320-2 are the same as in the above-described embodiment, and the frame 330 is formed in the center partition wall 332. By separating the first electronic paper sheet (310-1) and the second electronic paper sheet (320-2) through it to exclude the interference caused by the vibration of the two electronic paper sheets (310-1, 310-2) to enable independent driving do. In addition, as an alternative to the third embodiment, an edge may be added between each electronic paper sheet 310-1.310-2 and the frame 330.

In the electronic paper display device 300 according to the third embodiment of the present invention, a first video signal is input through a first video input terminal Video 1 and a first audio input terminal is input through an first audio input terminal Audio 1. When the first audio signal is input, the first electronic paper driver 302-1 applies a voltage to the pixel electrode of the first electronic paper sheet 310-1 according to the first video signal, thereby applying the first electronic paper sheet 310-1. 1) displays an image, and the first piezoelectric driver 304-1 drives the first piezoelectric module 320-1 in close contact with the first electronic paper sheet 310-1 according to the first audio signal. The first electronic paper sheet 310-1 generates the first sound without a separate speaker.

In addition, when the second audio signal is input through the second audio input terminal Audio 2, the second piezoelectric driver 304-2 is in close contact with the second electronic paper sheet 310-2 according to the second audio signal. By driving the piezoelectric module 320-2 to allow the second electronic paper sheet 310-2 to generate a second sound without a separate speaker, the second sound can be operated in stereo by the first sound and the second sound. In this case, the video signal may be inputted by two different video signals, respectively, to display two images, or one video signal may be divided to display one image at twice the size.

Fourth Embodiment

FIG. 11 is a perspective view illustrating an electronic paper display apparatus having a speaker function according to a fourth embodiment of the present invention, and FIG. 12 is a block diagram illustrating the entire configuration of the electronic paper display apparatus having a speaker function according to a fourth embodiment of the present invention. It is also. In the fourth embodiment of the present invention, one electronic paper sheet is driven by at least two piezoelectric modules to drive a multipoint. In the fourth embodiment of the present invention, one electronic paper sheet 410 is driven by four piezoelectric modules ( 420-1 ~ 420-4).

The electronic paper display apparatus 400 having the speaker function according to the fourth embodiment of the present invention drives one electronic paper sheet 410 according to the video signal Video IN, as shown in FIGS. 11 and 12. The electronic paper driver 402, one electronic paper sheet 310 for displaying an image of a video signal according to the driving of the electronic paper driver 402, and one audio signal according to one audio signal Audio IN. First to fourth piezoelectric driving units 404-1 to 404-4 and first to fourth piezoelectric driving units 404-1 to 404- for driving the fourth piezoelectric modules 420-1 to 420-4, respectively. According to the driving of 4), the electronic paper sheet 410 is composed of first to fourth piezoelectric modules 420-1 to 4 that vibrate at four locations, respectively, to generate sound. The sheet 410 may be driven at multiple points to generate a large sound.

11 and 12, the electronic paper driver 402, the piezoelectric driver 404-1 to 404-4, the electronic paper sheet 410, and the piezoelectric modules 420-1 to 420-4 are described above. The same as the embodiment, and as a modification of the fourth embodiment, one piezoelectric drive unit may be configured to drive four piezoelectric modules 420-1 to 420-4 simultaneously.

In the electronic paper display device 400 according to the fourth embodiment of the present invention, when a video signal is input through a video input terminal (Video IN) and an audio signal is input through an audio input terminal (Audio IN), the electronic paper driving unit Reference numeral 402 denotes a voltage applied to the pixel electrode of the electronic paper sheet 410 according to the video signal so that the electronic paper sheet 410 displays an image corresponding to the video signal, and the first to fourth piezoelectric driving units 404-. 1 to 404-4 drive one to four piezoelectric modules 420-1 to 420-4 distributed and attached to four places of the electronic paper sheet 410 according to the audio signal. 410 causes very loud sound without a separate speaker.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

100,200,300,400: Electronic paper display device
102: power supply
104,302-1,302-2,402: Electronic paper drive unit
106,304-1,304-2,404-1 ~ 404-4: Piezoelectric drive part
110,210,310-1,310-2,410: Electronic paper sheet
120,220,320-1,320-2,420-1 ~ 420-4: Piezoelectric Module
130,230,330: frames

Claims (10)

Electronic paper sheet which displays image,
The electronic paper display device having a speaker function comprising a piezoelectric module that is in close contact with the electronic paper sheet and generates the sound without a separate speaker. The method of claim 1, wherein the electronic paper display device
A piezoelectric driver for driving the piezoelectric module by receiving an audio signal;
An electronic paper driver configured to receive a video signal and drive the electronic paper;
Electronic paper display device having a speaker function characterized in that it further comprises a frame for supporting the electronic paper sheet. The method of claim 2, wherein the piezoelectric module
Electronic paper display device having a speaker function, characterized in that attached to the lower plate or the frame of the electronic paper sheet. The method of claim 1, wherein the electronic paper sheet
It is manufactured by any one of electrophoresis method using a microcapsule or microcup, a method using a twist ball, a method using a QR-LPD (Quick Response Liquid Powder Display), or an electrowetting method. Electronic paper display device having a speaker function characterized in. The method of claim 1, wherein the piezoelectric module
A support means for being in close contact with the electronic paper sheet to transmit vibration, a lower electrode, an upper electrode, a piezoelectric element vibrating according to a voltage applied between the lower electrode and the upper electrode, and a housing for accommodating these parts Consist of
The driving signal transmitted from the piezoelectric driving unit is applied between the lower electrode and the upper electrode to vibrate the piezoelectric element, and the vibration of the piezoelectric element is transmitted to the electronic paper sheet through the supporting means, thereby transmitting the electronic paper sheet. Electronic paper display device having a speaker function, characterized in that configured to generate sound. An electronic paper sheet displaying an image;
A piezoelectric module attached to the electronic paper sheet for vibrating the electronic paper sheet;
An edge for adjusting acoustic characteristics while supporting the electronic paper sheet in a frame; And
Electronic paper display device having a speaker function, characterized in that consisting of a frame for supporting the electronic paper sheet connected to the edge. The method of claim 6, wherein the edge is
Electronic paper display device having a speaker function, characterized in that the electronic paper sheet is different in rigidity or has a pattern of a predetermined shape. A first electronic paper sheet for displaying an image;
A second electronic paper sheet for displaying an image;
A first piezoelectric module for driving the first electronic paper sheet;
A second piezoelectric module for driving the second electronic paper sheet; And
The first electronic paper sheet and the second electronic paper sheet is separated and accommodated, and composed of a frame for supporting each electronic paper sheet
Electronic paper display device having a speaker function characterized in that it has a split screen and stereo characteristics. The method of claim 8, wherein the electronic paper display device
A first electronic paper driver for driving the first electronic paper sheet according to a first video signal;
A first piezoelectric driver for driving the first piezoelectric module according to a first audio signal;
A second electronic paper driver for driving the second electronic paper sheet according to a second video signal;
And a second piezoelectric driver for driving the second piezoelectric module according to a second audio signal. An electronic paper driver for driving one electronic paper sheet according to a video signal;
An electronic paper sheet displaying an image of a video signal according to the driving of the electronic paper driving unit;
At least two piezoelectric driving units for driving at least two piezoelectric modules in accordance with one audio signal;
At least two or more distributed arrangements are attached to one electronic paper sheet, each of which includes at least two piezoelectric modules vibrated by the at least two piezoelectric actuators to vibrate the one electronic paper sheet.
Electronic paper display device having a speaker function, characterized in that for driving one electronic paper sheet multi-point.

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