TW201828274A - Electronic paper display apparatus - Google Patents

Abstract

An electronic paper display apparatus including an electronic paper display panel and a driver apparatus is provided. The electronic paper display panel displays image frames and includes a plurality of display modes. The driver apparatus is electrically connected to the electronic paper display panel. The driver apparatus determines what display mode the electronic paper display panel is according to image data. The driver apparatus selects driving signals to drive the electronic paper display panel to display the image frames according to the display mode of the electronic paper display panel. The image data is encoded according to one of a plurality of encoding methods to include information of the display mode of the electronic paper display panel.

Description

Electronic paper display device

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

The electronic paper display device is a new type of display device, which has the advantages of being light and thin, durable, and energy-saving and environmentally-friendly, and has been widely used in electronic readers (for example, electronic books, electronic newspapers) or other electronic components (for example, ,electronic label). In the prior art, electronic paper display devices typically have a variety of different display modes. Under the current architecture, the system application master must pass display mode messages or parameters to the drive device. In software engineering, parameters or header messages must travel through different software layers, so it is easy to generate interface communication problems caused by the need for parameter transfer. Under the larger software architecture, this approach requires long-term planning and large software modifications.

The invention provides an electronic paper display device, wherein the image data comprises display mode information of the electronic paper display panel.

The electronic paper display device of the present invention includes an electronic paper display panel and a driver device. The electronic paper display panel is used to display image images and includes a variety of different display modes. The driver device is electrically connected to the electronic paper display panel. The driver device is configured to determine, according to the image data, what display mode the electronic paper display panel is. The driver device selects a driving signal according to a display mode of the electronic paper display panel to drive the electronic paper display panel to display an image screen. The image data is used to encode information including a display mode of the electronic paper display panel according to one of a plurality of encoding methods.

In an embodiment of the invention, the encoding method includes a plurality of gradation tables. According to the display mode of the electronic paper display panel, one of the tone scale tables is selected to encode the image data.

In an embodiment of the invention, the different display modes correspond to different tone scale tables. Each gradation table includes a plurality of coding sequences. The pixel data in the image data is encoded according to the coding order of the selected tone scale table.

In an embodiment of the invention, the display mode of the electronic paper display panel includes a black and white display mode. The tone scale table corresponding to the black and white display mode includes two different encoding sequences. The driver device determines that the display mode of the electronic paper display panel is a black and white display mode according to at least one of two different encoding sequences.

In an embodiment of the invention, the black and white display mode includes a first black and white display mode and a second black and white display mode. The coding sequence included in the tone scale table corresponding to the first black and white display mode and the second black and white display mode is different.

In an embodiment of the invention, the display mode of the electronic paper display panel includes a grayscale display mode. The tone scale table corresponding to the gray scale display mode includes three or more different code sequences. The driver device determines that the display mode of the electronic paper display panel is a grayscale display mode according to at least one of three or more different encoding sequences.

In an embodiment of the invention, the grayscale display mode includes a first grayscale display mode and a second grayscale display mode. The coding sequence included in the tone scale table corresponding to the first gray scale display mode and the second gray scale display mode is different.

In an embodiment of the invention, the different display modes correspond to different driving signals.

In an embodiment of the invention, the driver device includes a software timing controller.

In an embodiment of the invention, the electronic paper display device described above includes two display screens, and the electronic paper display panel serves as one of the two display screens.

Based on the above, in an exemplary embodiment of the present invention, the image data includes information of a display mode of the electronic paper display panel, and the driver device determines, according to the image data, which display mode the electronic paper display panel is.

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 terms "coupled" and "electrically connected" as used throughout the specification (including the scope of the claims) may be used in any direct or indirect connection. For example, if the first device is described as being coupled to the second device, it should be construed that the first device can be directly connected to the second device, or the first device can be connected through other devices or some kind of connection means. Connected to the second device indirectly. In addition, the term "signal" may mean at least one current, voltage, charge, temperature, data, electromagnetic wave or any other one or more signals.

1 is a schematic diagram showing an electronic paper display device according to an embodiment of the present invention. Referring to FIG. 1, the electronic paper display device 100 of the present embodiment includes a driver device 140 and an electronic paper display panel 120. The driver device 140 is electrically connected to the electronic paper display panel 120. The driver device 140 includes a timing controller circuit 110 and a driving circuit 130. The electronic paper display panel 120 includes an active area 122. In the embodiment, the driving circuit 130 is used for the electronic paper display panel 120 to display an image frame in the active area 122 thereof. In an embodiment, the driving circuit 130 can also be disposed independently of the electronic paper display panel 120.

In the present embodiment, the electronic paper display panel 120 includes a plurality of different display modes, such as a quick display mode, an input method display mode, a reading high quality display mode, and an image high quality display mode. However, the number and type names are not intended to limit the invention. In the present embodiment, the timing controller circuit 110 determines which display mode the electronic paper display panel 120 is based on the image data DS2. The timing controller circuit 110 selects the driving signal DS1 according to the display mode of the electronic paper display panel, and supplies it to the driving circuit 130 to drive the electronic paper display panel 120 to display the image image.

In the embodiment, the image data DS2 is used to encode information including the display mode of the electronic paper display panel 120 according to one of a plurality of encoding modes. In an embodiment, the image data DS2 may be, for example, an external microcontroller (MCU), a system on chip (SOC), or other embedded system as a system application host for image data. DS2 is encoded. The system application host controls the display function of the electronic paper display panel 120 by controlling the timing controller circuit 110. In such an application, the display control and display mode of the electronic paper display panel 120 will be selected by the system application host. Therefore, the system application host can encode the image data DS2 so that the image data DS2 includes the information of the display mode of the electronic paper display panel 120.

In this embodiment, the encoding mode includes a plurality of tone scale tables. Depending on the display mode of the electronic paper display panel 120, one of the tone scale tables is selected to encode the image data DS2. Table 1 below is a plurality of gradation tables according to an embodiment of the present invention, and each column corresponds to a gradation table of a display mode: (Table 1)

In Table 1, different display modes correspond to different tone scale tables. Each gradation table includes a plurality of coding sequences. In the present embodiment, the quick display mode and the input method display mode are, for example, a black and white display mode. The order of the codes included in the tone scale table corresponding to the quick display mode and the input mode display mode are different. For example, if the electronic paper display panel 120 is to display an image frame in the fast display mode, the black pixel data in the image data DS2 is encoded, for example, by the code sequence "11-00-00", and the white pixel data is encoded. For example, the coding is performed by the coding sequence "EE-FF-FF". If the electronic paper display panel 120 is to display an image screen in the input method display mode, the black pixel data in the image data DS2 is encoded by, for example, the encoding sequence "00-00-12", and the white pixel data is, for example, The coding sequence "FF-EE-EC" is used for encoding.

In the present embodiment, the reading high-quality display mode and the image high-quality display mode are, for example, grayscale display modes, and three or more different grayscales can be displayed. Therefore, the coding order included in the tone scale table corresponding to the reading high-quality display mode and the image high-quality display mode is different. For example, if the electronic paper display panel 120 is to display an image frame in the reading high-quality display mode, the black pixel data in the image data DS2 is encoded by, for example, the encoding sequence "00-00-00", white. The pixel data is encoded, for example, by the coding sequence "FF-FF-FF", and the gray pixel data is encoded by the coding sequence "18-18-18" using the first gray as an example. The coding order of the remaining gray pixel data can be deduced by the same as those listed in the table, and will not be described here. If the electronic paper display panel 120 is to display an image screen in the image high-quality display mode, the black pixel data in the image data DS2 is encoded by the encoding sequence "04-04-04", for example, white pixel data. For example, the coding is performed by the coding sequence "F4-F4-F4", and the gray pixel data is encoded by the coding sequence "14-14-14" by taking the first gray as an example. The coding order of the remaining gray pixel data can be deduced by the same as those listed in the table, and will not be described here.

In this embodiment, the timing controller circuit 110 can determine which display mode of the display mode of the electronic paper display panel 120 according to at least one of different coding sequences. For example, if the black pixel data in the image data DS2 is encoded, for example, in the code sequence "00-00-00", the timing controller circuit 110 can determine that the display mode of the electronic paper display panel 120 is a high-quality display. The mode selects a drive waveform corresponding to the read high-quality display mode and transmits it to the drive circuit 130. The method for determining the display mode of the electronic paper display panel 120 by the timing controller circuit 110 according to the coding sequence of the pixel data can be understood by referring to Table 1, and details are not described herein again.

In this embodiment, the tone scale table is a representation rule of pixel data, and different values are used to represent different colors (gray) and display modes in the pixel data to include the mode information in the pixel data. The gradation table listed in Table 1 is for illustrative purposes only, and the present invention is not limited thereto. In addition, in this embodiment, the timing controller circuit 110 selects different driving signals corresponding to different display modes, and the driving manner thereof can obtain sufficient teaching, suggestion, and implementation instructions by the general knowledge in the technical field, and thus is no longer Narration.

In the present embodiment, the timing controller circuit 110 is, for example, a Software Timing Controller. In this application, the function of the hardware controller can be replaced by a microcontroller (Microcontroller Unit (MCU) or a central processing unit (CUP) in software processing. At this time, the electronic paper display The device 100 does not require an external hard-dissolving timing controller, which can improve performance, reduce production cost, and greatly shorten the product development process, and is suitable for applications in mobile communication devices, such as dual-screen mobile phones or mobile phone back cases. Therefore, in an embodiment, the electronic paper display device 100 includes, for example, two or more display screens, the electronic paper display panel 120 serves as one of two display screens, and the other display panel may be a liquid crystal display panel ( Any combination of liquid-crystal display (LCD) or Organic Light-Emitting Diode (OLED), but is not limited thereto.

In summary, in an exemplary embodiment of the present invention, the driving method is at least applicable to an electronic paper display device having a plurality of display mode switching requirements. The purpose of mode message delivery is achieved without passing parameters or header messages. In software engineering, the interface or header message can be saved through different software layers and the interface communication problem caused by the need of parameter transfer can be avoided, so that the image transfer process can be changed without changing the image transfer process. The purpose of the mode message delivery.

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‧‧‧Electronic paper display device

110‧‧‧Sequence controller circuit

120‧‧‧electronic paper display panel

122‧‧‧active area

130‧‧‧Drive circuit

140‧‧‧Drive device

DS1‧‧‧ drive signal

DS2‧‧‧ image data

1 is a schematic diagram showing an electronic paper display device according to an embodiment of the present invention.

Claims (10)

An electronic paper display device comprising: an electronic paper display panel for displaying an image frame and comprising a plurality of different display modes; and a driver device electrically connected to the electronic paper display panel for displaying an image according to an image Determining a display mode of the electronic paper display panel, and selecting a driving signal according to a display mode of the electronic paper display panel to drive the electronic paper display panel to display an image image, wherein the image data is used according to one of a plurality of encoding modes The code is encoded to include information on the display mode of the electronic paper display panel. The electronic paper display device of claim 1, wherein the encoding modes comprise a plurality of tone scale tables, and one of the color tone tables is selected according to a display mode of the electronic paper display panel The image data is encoded. The electronic paper display device of claim 2, wherein the different display modes correspond to different tone scale tables, each of the tone scale tables includes a plurality of code sequences, and the pixel data in the image data is The encoding is encoded according to the selected encoding order of the gradation table. The electronic paper display device of claim 3, wherein the display mode of the electronic paper display panel comprises a black and white display mode, the tone scale table corresponding to the black and white display mode comprises two different encoding sequences, and the The driver device determines, according to at least one of the two different encoding sequences, that the display mode of the electronic paper display panel is the black and white display mode. The electronic paper display device of claim 4, wherein the black and white display mode comprises a first black and white display mode and a second black and white display mode, and corresponding to the first black and white display mode and the second black and white display mode. The coding sequences included in the gradation tables are all different. The electronic paper display device of claim 3, wherein the display mode of the electronic paper display panel comprises a grayscale display mode, and the tone scale table corresponding to the grayscale display mode includes three or more different encoding sequences. And the driver device determines, according to at least one of the three or more different encoding sequences, that the display mode of the electronic paper display panel is the grayscale display mode. The electronic paper display device of claim 6, wherein the grayscale display mode comprises a first grayscale display mode and a second grayscale display mode, and corresponding to the first grayscale display mode and the first The coding sequences included in the gradation tables of the two gray scale display modes are all different. The electronic paper display device of claim 1, wherein the different display modes correspond to different driving signals. The electronic paper display device of claim 1, wherein the driver device comprises a soft release timing controller. The electronic paper display device of claim 1, wherein the electronic paper display device comprises two display screens, and the electronic paper display panel is one of the two display screens.