TWI611387B - Electronic paper displayer device - Google Patents

Abstract

An electronic paper display device includes an electronic paper display substrate and a power supply circuit. An electronic paper display panel and a drive circuit are disposed on the electronic paper display substrate. The power supply circuit is electrically connected to the electronic paper display panel and the driving circuit. The power supply circuit is configured to output the first driving signal to the electronic paper display panel, and output the voltage signal to the driving circuit. The power supply circuit includes a level shifter. The power supply circuit uses the level shifter to output the first driving signal to the electronic paper display panel. The drive circuit includes a source driver. The driving circuit uses the source driver to output the second driving signal to the electronic paper display panel according to the voltage signal.

Description

Electronic paper display device

This invention relates to a display device, and more particularly to an electronic paper display device.

With the advancement of electronic technology, related applications of electronic paper have become more and more popular in people's lives, and electronic paper display panels that provide high display resolution or low display resolution can be designed according to user needs. However, since the current electronic paper display device requires a large circuit layout space and a production cost to configure the driving circuit of the electronic paper panel, the circuit layout space is limited. Therefore, in order to increase the application range of the electronic paper display device and the circuit layout space, it is advantageous to combine other functional circuits. How to reduce the production cost of electronic paper display devices and increase the layout space of circuits is an important issue at present. In view of this, the present invention will set forth the solutions of several embodiments below.

The present invention provides an electronic paper display device which can increase the circuit layout space and reduce the production cost.

An electronic paper display device of the present invention includes an electronic paper display substrate and a power supply circuit. An electronic paper display panel and a drive circuit are disposed on the electronic paper display substrate. The power supply circuit is electrically connected to the electronic paper display panel and the driving circuit. The power supply is used to output the first driving signal to the electronic paper display panel, and output the voltage signal to the driving circuit. The power supply circuit includes a level shifter. The power supply circuit uses the level shifter to output the first driving signal to the electronic paper display panel. The drive circuit includes a source driver. The driving circuit uses the source driver to output the second driving signal to the electronic paper display panel according to the voltage signal.

In an embodiment of the invention, the electronic paper display device further includes a timing controller (TCON). The timing controller is configured to provide a first control signal to the power supply circuit, so that the power supply circuit determines the output timing of the first driving signal according to the first control signal by using the level shifter.

In an embodiment of the invention, the timing controller described above is not disposed on the electronic paper display substrate. The timing controller is electrically connected to the driving circuit and the power supply circuit to control the output timing of the first driving signal and the second driving signal.

In an embodiment of the invention, the timing controller further provides a second control signal to the driving circuit, so that the driving circuit uses the source driver to determine the output timing of the second driving signal according to the second control signal.

In an embodiment of the invention, the timing controller described above is disposed on a printed circuit board.

In an embodiment of the invention, the timing controller is disposed on an electronic paper display substrate, and the timing controller is integrated in the driving circuit.

In an embodiment of the invention, the driving circuit outputs a first control signal by using a timing controller, so that the driving circuit controls the output timings of the first driving signal and the second driving signal.

In an embodiment of the invention, the first driving signal is a gate driving signal, and the second driving signal is a source driving signal.

In an embodiment of the invention, the electronic paper display substrate is an array substrate, and the electronic paper display substrate includes a gate driving circuit.

In an embodiment of the invention, the electronic paper display substrate is a flexible substrate.

Based on the above, the electronic paper display device of the embodiment of the present invention can effectively reduce the development by integrating the level shifter into the power supply circuit so that the power supply circuit can directly provide the driving signal to the electronic paper display panel. Cost and increase circuit layout space.

The above described features and advantages of the invention will be apparent from the following description.

The invention is illustrated by the following examples, but the invention is not limited to the illustrated embodiments. Further combinations are also allowed between the embodiments. The term "electrical connection" as used throughout the specification (including the scope of the claims) may be used to refer to any direct or indirect means of attachment. In addition, the term "signal" may refer to at least one current, voltage, charge, temperature, data, electromagnetic wave or any other one or more signals.

1 is a block diagram of an electronic paper display substrate according to an embodiment of the invention. Referring to FIG. 1, an electronic paper display device 100 includes an electronic paper display substrate 110, which may be a glass substrate or a flexible substrate. Further, an electronic paper display panel 120 and a drive circuit 130 are disposed on the electronic paper display substrate 110. The driving circuit 130 is electrically connected to the electronic paper display panel 120. In this embodiment, the driving circuit 130 may include a source driver and is used to drive the electronic paper display panel 120. In this example, the electronic paper display substrate 110 is manufactured by a Gate on Array (GOA) technology. That is, the gate driving circuit is directly formed in the electronic paper display substrate 110. Since the electronic paper display panel 120 is disposed on the electronic paper display substrate 110, the electronic paper display panel 120 can be combined with the gate driving circuit without external connection. A gate drive circuit provided on another circuit substrate. Accordingly, the electronic paper display device 100 can reduce the number of external drive circuit chips to increase the circuit layout space.

In this embodiment, the electronic paper display panel 120 can be an Electro-Phoretic Display (EPD), an Electro-Wetting Display (EWD), or a Cholesteric Liquid Crystal Display (CLCD). Or other bi-stable display panels, the invention is not limited thereto.

2 is a block diagram of an electronic paper display device according to an embodiment of the invention. Referring to FIG. 2, the electronic paper display device 200 includes an electronic paper display substrate 210, a power supply circuit 240, a level shifter 250, and a timing controller 260. The electronic paper display substrate 210 is provided with an electronic paper display panel 220 and a driving circuit 230 , wherein the driving circuit 230 is electrically connected to the electronic paper display panel 220 . In the present embodiment, the power supply circuit 240 outputs the first voltage signal VS1 to the level shifter 250 and outputs the second voltage signal VS2 to the driving circuit 230. The drive circuit 230 in this example may further include a source driver.

The power supply circuit 240 can be a Power Management Integrated Circuit (PMIC) and is used to provide a plurality of high and low operating voltage signals required by the driver circuit 230 and the level shifter 250. Specifically, the level shifter 250 can generate the first driving signal DS1 to the electronic paper display panel 220 according to the first voltage signal VS1. The driving circuit 230 can generate the second driving signal DS2 to the electronic paper display panel 220 according to the second voltage signal VS2. In this embodiment, the first driving signal DS1 can be a gate driving signal, and the second driving signal DS2 can be a source driving signal. Therefore, the electronic paper display panel 220 can provide an image display function according to the first driving signal DS1 and the second driving signal DS2.

In an embodiment, the first driving signal DS1 may further include a high gate voltage (VGH) and a low gate voltage (VGL), and the level shifter 250 may display according to the electronic paper. The driving specifications of the panel 220 are used to adjust the voltage levels of the high and low gate voltages, and the invention is not limited thereto.

The timing controller 260 is configured to control the output timings of the first driving signal DS1 and the second driving signal DS2, wherein the timing controller 260 is electrically connected to the driving circuit 230 and the level shifter 250. The timing controller 260 provides the first control signal CS1 to the level shifter 250 to cause the level shifter 250 to determine the output timing of the first driving signal DS1 according to the first control signal CS1. The timing controller 260 provides the second control signal CS2 to the driving circuit 230, so that the driving circuit 230 determines the output timing of the second driving signal DS2 according to the second control signal CS2. In this example, the power supply circuit 240, the level shifter 250, and the timing controller 260 can be externally disposed on an additional printed circuit board (PCB) and electrically connected to the electronic paper display. The electronic paper display panel 220 on the substrate 210 and the drive circuit 230.

The technical features of the electronic paper display substrate and the electronic paper display panel of FIG. 2 can be sufficiently taught and explained in the embodiment and the embodiment of FIG. 1 and therefore will not be described again.

3 is a block diagram of an electronic paper display device according to another embodiment of the present invention. Referring to FIG. 3, the electronic paper display device 300 includes an electronic paper display substrate 310 and a power supply circuit 340. The electronic paper display substrate 310 is provided with an electronic paper display panel 320 and a driving circuit 330, wherein the driving circuit 330 is electrically connected to the electronic paper display panel 320. In this example, the driver circuit 330 can include a source driver 331. The power supply circuit 340 is configured to provide the first driving signal DS1 to the electronic paper display panel 320, and provide the voltage signal VS to the source driver 331 of the driving circuit 330, so that the source driver 331 generates the second driving signal DS2 according to the voltage signal VS. To the electronic paper display panel 320.

Compared with the embodiment of FIG. 2, the level shifter 341 of the present embodiment is integrated in the power supply circuit 340, so that the power supply circuit 340 can output the first driving signal DS1 to the electronic paper display by using the level shifter 341. Panel 320. Therefore, the power supply circuit 340 can directly drive the electronic paper display panel 320 and simultaneously provide the voltage required for the drive circuit 330. That is, the electronic paper display device 300 can be integrated into the power supply circuit 340 by integrating the level shifter 341 to save the circuit configuration space required for the external level shifter 341.

4 is a block diagram of an electronic paper display device according to another embodiment of the present invention. Referring to FIG. 4, the electronic paper display device 400 includes an electronic paper display substrate 410 and a power supply circuit 440. The electronic paper display substrate 410 is provided with an electric paper display panel 420 and a driving circuit 430 thereon, and the driving circuit 430 is electrically connected to the electronic paper display panel 420. In the present embodiment, the drive circuit 430 includes a source driver 431. In this example, the power supply circuit 440 is configured to provide the first driving signal DS1 to the electronic paper display panel 420, and provide the voltage signal VS to the source driver 431 of the driving circuit 430, so that the source driver 431 generates the first signal according to the voltage signal VS. The second driving signal DS2 is connected to the electronic paper display panel 420.

In this example, the electronic paper display device 400 further includes a timing controller 460 and is not disposed on the electronic paper display substrate 410, for example, may be disposed on another circuit substrate, and is electrically connected to the driving circuit 430 and the power supply circuit. 440. Therefore, the timing controller 460 can provide the first control signal CS1 to the level shifter 441 integrated in the power supply circuit 440, and provide the second control signal CS2 to the source driver 431 integrated in the driving circuit 430. In this embodiment, the power supply circuit 440 can determine the output timing of the first driving signal DS1 according to the first control signal CS1, and the driving circuit 430 can determine the output timing of the second driving signal DS2 according to the second control signal CS2.

In particular, since the level shifter 441 is integrated into the power supply circuit 440, the electronic paper display device 400 can save the circuit configuration space of the external level shifter 441. Moreover, the electronic paper display device 400 further includes a timing controller 460 for controlling the output timing of the first driving signal DS1 and the second driving signal DS2. Since the timing controller 460 is externally connected to the electronic paper display panel 420, the timing controller 460 can select its memory size according to different resolution requirements, and in particular, can be applied to an electronic paper display device with high resolution requirements. That is, the circuit architecture of the present embodiment can be applied to a higher resolution electronic paper display device.

FIG. 5 is a block diagram of an electronic paper display device according to another embodiment of the present invention. Referring to FIG. 5, the electronic paper display device 500 includes an electronic paper display substrate 510 and a power supply circuit 540. An electronic paper display panel 520 and a driving circuit 530 are disposed on the electronic paper display substrate 510 and electrically connected to the electronic paper display panel 520. In the present embodiment, the drive circuit 530 includes a source driver 531. The power supply circuit 540 is configured to provide the first driving signal DS1 to the electronic paper display panel 520, and provide the voltage signal VS to the source driver 531 of the driving circuit 530, so that the source driver 531 generates the second driving signal DS2 according to the voltage signal VS. To the electronic paper display panel 520.

In this example, the driving circuit 530 further includes a timing controller 532 disposed on the electronic paper display substrate 510 and integrated in the driving circuit 530. Therefore, the driving circuit 530 can output the control signal CS to the level shifter 541 integrated in the power supply circuit 540 by using the timing controller, so that the power supply circuit 540 can determine the output of the first driving signal DS1 according to the control signal CS. Timing. Moreover, the driving circuit 530 can provide the second driving signal DS2 to the electronic paper display panel 520.

In the present embodiment, since the level shifter 541 is integrated into the power supply circuit 540, and the timing controller 532 is integrated into the driving circuit 530, the electronic paper display device 500 can save the external level shifter 541. And the circuit configuration space of the timing controller 532. Since the timing controller 532 is integrated into the driving circuit 530, the timing controller 532 is more suitable for a control chip that is smaller in size and smaller in memory. That is, the circuit architecture of the present embodiment can be applied to a lower resolution electronic paper display device.

In summary, in the embodiment of the present invention, the level shifter can be integrated into the power supply circuit to save the circuit layout space of the electronic paper display device. Moreover, the power supply circuit and the driving circuit of the electronic paper display device can be externally connected with a timing controller to control the output timing of the driving signal for driving the electronic paper display panel, and the circuit structure can be applied to a higher resolution electronic paper display. panel. Alternatively, the timing controller can be integrated into the driving circuit of the electronic paper display device to save space in the circuit layout, wherein the circuit architecture can be applied to a lower resolution electronic paper display panel. Therefore, since the level shifter of the present invention is integrated into the power supply circuit, and the timing controller can select whether to be disposed on the electronic paper display substrate according to different resolution requirements, so as to effectively reduce development cost and increase circuit layout space. .

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100, 200, 300, 400, 500‧‧‧ electronic paper display devices
110, 210, 310, 410, 510‧‧‧electronic paper display substrate
120, 220, 320, 420, 520‧‧‧ electronic paper display panel
130, 230, 330, 430, 530‧‧‧ drive circuits
240, 340, 440, 540‧‧‧ power supply circuit
250, 341, 441, 541‧‧ ‧ position shifters
260, 460, 532‧‧‧ timing controller
331, 431, 531‧‧‧ source drivers
CS, CS1, CS2‧‧‧ control signals
DS1, DS2‧‧‧ drive signals
VS, VS1, VS2‧‧‧ voltage signal

1 is a block diagram of an electronic paper display substrate according to an embodiment of the invention. 2 is a block diagram of an electronic paper display device according to an embodiment of the invention. 3 is a block diagram of an electronic paper display device according to another embodiment of the present invention. 4 is a block diagram of an electronic paper display device according to another embodiment of the present invention. FIG. 5 is a block diagram of an electronic paper display device according to another embodiment of the present invention.

300‧‧‧Electronic paper display device

310‧‧‧Electronic paper display substrate

320‧‧‧electronic paper display panel

330‧‧‧Drive circuit

331‧‧‧Source Driver

340‧‧‧Power supply circuit

341‧‧‧ Position shifter

DS1‧‧‧ first drive signal

DS2‧‧‧second drive signal

VS‧‧‧ voltage signal

Claims (10)

An electronic paper display device comprising: an electronic paper display substrate on which an electronic paper display panel and a driving circuit are disposed; and a power supply circuit electrically connected to the electronic paper display panel and the driving circuit for outputting a first driving signal to the electronic paper display panel, and outputting a voltage signal to the driving circuit, wherein the power supply circuit includes a one-bit shifter, and the power supply circuit outputs the first A driving signal is sent to the electronic paper display panel, wherein the driving circuit comprises a source driver, and the driving circuit uses the source driver to output a second driving signal to the electronic paper display panel according to the voltage signal. The electronic paper display device of claim 1, wherein the electronic paper display device further comprises a timing controller, and the timing controller is configured to provide a first control signal to the power supply circuit to enable the power supply The supply circuit uses the level shifter to determine the output timing of the first driving signal according to the first control signal. The electronic paper display device of claim 2, wherein the timing controller is not disposed on the electronic paper display substrate, and is electrically connected to the driving circuit and the power supply circuit to control the first The driving signal and the output timing of the second driving signal. The electronic paper display device of claim 3, wherein the timing controller further provides a second control signal to the driving circuit, so that the driving circuit uses the source driver to determine according to the second control signal. The output timing of the second driving signal. The electronic paper display device of claim 3, wherein the timing controller is disposed on a printed circuit board. The electronic paper display device of claim 2, wherein the timing controller is disposed on the electronic paper display substrate, and the timing controller is integrated in the driving circuit. The electronic paper display device of claim 6, wherein the driving circuit outputs the first control signal by using the timing controller, so that the driving circuit controls the output of the first driving signal and the second driving signal. Timing. The electronic paper display device of claim 1, wherein the first driving signal is a gate driving signal, and the second driving signal is a source driving signal. The electronic paper display device of claim 1, wherein the electronic paper display substrate is an array substrate, and the electronic paper display substrate comprises a gate driving circuit coupled to the electronic paper display panel. The electronic paper display device of claim 1, wherein the electronic paper display substrate is a flexible substrate.