The electronic paper display is a new display with low power consumption and comfortable reading. As a new display technology, e-paper displays have spawned many innovative mobile applications, such as e-books, electronic newspapers, and electronic display cards. The S1D13521 is an electronic paper display controller jointly launched by Epson and E Ink in 2008. It has a variety of new features and provides powerful technical support for E Ink electronic paper display. How to make full use of the characteristics of S1D13521 to provide a better human-computer interaction experience for the new generation of electronic paper display has become a problem to be studied and solved. This article takes the Jinke V30 handheld reader as an example to introduce some design experiences and implementation techniques in actual development.
2 S1D13521 and development platform2.1 Introduction to S1 D13521
The S1D13521 provides a variety of host processing functions, greatly reducing the host load and improving the overall performance of the system; supporting 2 048 & TImes; 1 536 resolution (50 Hz), maximum support 4 09 * 096 resolution (less than 50 Hz), Support 32 gray level display; support multi-area parallel display refresh, improve the response speed of electronic paper display. With this controller, the electronic paper display can perform partial erasing of up to 16 areas simultaneously. The dramatic increase in display response speed has made touch-screen user interaction possible, with a new range of applications such as responsive stylus input and drop-down menus. This technology provides strong support for improving the e-paper user interface experience.
The structure of the S1D13521 system is shown in Figure 1. The S1D13521 display controller is used between the host and the electronic paper display to control the display refresh of the electronic paper.
2.2 S1D13521 display control principle
The electronic paper display has a unique display refresh mechanism. Unlike the dynamic active refresh mode of displays such as CRT and TFT, the electronic paper display will only be refreshed when the data is updated, which is relatively static passive refresh.
Based on the characteristics of the electronic paper display, the S1D13521 mainly provides two functions to the upper layer, namely texture and brushing. The texture function is to copy an area of ​​the memory into the memory; the screen function is to refresh an area in the memory to the electronic paper display. The screen is divided into a full screen refresh and a block refresh of a partial rectangular area. The block brush can be further divided into a multi-level gray block brush and a black and white two-stage block brush, wherein the black and white two-stage block brush has a higher response speed.
2.3 Introduction to the development platform
The development platform of this paper uses the Jinke V30 handheld reader. The device uses the S1D13521 display controller with a 6-inch E Ink electronic paper display with a resolution of 600 & TImes; 800. The program in this application runs on the application layer. The S1D13521 programming interface packaged by the underlying driver is as follows:
3 Electronic paper human-computer interaction design3.1 Electronic paper human-computer interaction structure model
The S1D13521 greatly enhances the response speed of electronic paper, which accelerates the feedback of the display to user operations, making dynamic visual feedback possible. Based on this characteristics and advantages, this paper designs a control-feedback human-computer interaction structure model, as shown in Figure 2.
The two core parts of the model are dynamic visual feedback and touch screen input. Through a simple touch screen operation gesture, the user can conveniently and intuitively manipulate the device; the system gives dynamic visual feedback in time according to the touch screen input to guide the user to control; when the user gets the feedback information, the control action is changed according to the sensory acquisition. This is a loop of control-feedback that greatly enhances the user interaction experience.
3.2 Control gestures and interface layout
Based on the above model, this paper designs seven basic control gestures for the Jinke V30 handheld reader, and designs a reasonable interface layout based on this, as shown in Figure 3.
This design can realize the basic functions of all readers through several simple manipulation gestures, and it follows the principle of consistency of human-computer interaction design and the principle of interface simplicity. At the same time, it provides users with timely response through dynamic visual feedback. The entire interactive function.
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