CN111752063B

CN111752063B - Method capable of changing display mode, reading terminal and computer storage medium

Info

Publication number: CN111752063B
Application number: CN202010515062.1A
Authority: CN
Inventors: 程超; 成湘均
Original assignee: Ireader Technology Co Ltd; Zhangyue Technology Co Ltd
Current assignee: Ireader Technology Co Ltd; Zhangyue Technology Co Ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2021-04-30
Anticipated expiration: 2040-06-08
Also published as: CN111752063A

Abstract

The invention relates to a method capable of changing a display mode, a reading terminal and a computer storage medium. When the mode is switched to the non-color mode, displaying the image to be displayed in a gray scale picture; and when the color mode is switched, displaying the image to be displayed in a color picture.

Description

Method capable of changing display mode, reading terminal and computer storage medium

Technical Field

The invention relates to the technical field of display. More particularly, the present invention relates to a method, a reading terminal and a computer readable storage medium for changing display modes.

Background

With the change of reading habits of modern people, reading terminals are more and more accepted by the public. Most of the current ink screen reading terminals in the market still use black and white ink screens as the main part, so that only particles of black and white two colors can be used, and through the control of driving waveforms, gray scale effects with different shades can be provided between the black and white two colors, including the black and white two colors, 16 gray scale selections are provided at most, so that the terminal is also called as a 16-gray scale display mode, and image effects are presented by using different gray scales.

Although color ink screens are also released in the market, and the guide plate can realize color display of the whole color gamut, the technical principle of the method is that ink particles of different colors such as red, green and blue are added into an ink capsule, the different color particles are driven to move to different positions in the capsule through driving waveforms, and the three primary colors of red, green and blue are combined differently to realize various color effects.

Compared with a black-white ink screen, the color ink screen has the advantages that more ink particles of different types are added in the ink capsule, the driving mode becomes complicated due to different driving conditions of the particles of different types, and the display principle of the color ink screen is essentially different from that of the traditional black-white ink screen, so that the color ink screen cannot be compatible with black-white and color display modes.

Disclosure of Invention

To at least partially solve the technical problems mentioned in the background, the invention provides a method, a reading terminal and a computer storage medium for changing a display mode.

In one aspect, the present invention provides a reading terminal capable of changing display modes, comprising: ink screen, colored filter coating, touch screen, treater. The ink screen is used for displaying an image to be displayed and switching the keys; the color filter film is arranged on the ink screen and is provided with a plurality of pixel units, wherein each pixel unit comprises red, green and blue pixels and is used for displaying the color of the image to be displayed; the touch screen is used for receiving a touch instruction generated by clicking the switching key by a user; the processor is used for responding to the touch instruction to switch a non-color mode or a color mode. When the mode is switched to the non-color mode, displaying the image to be displayed in a gray scale picture; and when the color mode is switched, displaying the image to be displayed in a color picture.

In another aspect, the present invention provides a method for changing a display mode of a reading terminal, wherein the reading terminal comprises an ink screen. The method comprises the following steps: receiving an image to be displayed; receiving a touch instruction; judging whether the touch instruction is switched into a non-color mode or a color mode; if the mode is switched to the non-color mode, the image to be displayed is displayed by a gray picture by using the ink screen; if the mode is switched to the color mode, the image to be displayed is displayed in a color picture by using the ink screen.

In a further aspect, the invention provides a computer-readable storage medium having stored thereon computer program code for transforming a display mode of a reading terminal, which when executed by a processor performs the aforementioned method.

The reading terminal of the invention can be compatible with the non-color mode and the color mode, so that the reading terminal can achieve the purpose of flexibly selecting and displaying the gray scale picture or the color picture.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are illustrated by way of example and not by way of limitation, and like reference numerals designate like or corresponding parts throughout the several views, in which:

fig. 1 is a schematic view showing a structure of a reading terminal according to an embodiment of the present invention;

FIG. 2 is a schematic diagram showing an original color image of RGB 888;

FIG. 3 is a block diagram illustrating a color filter in combination with an ink screen according to an embodiment of the present invention;

FIG. 4 is a pixel diagram showing a color filter according to an embodiment of the present invention; and

FIG. 5 is a flow chart illustrating a method of switchable display modes according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the terms "first", "second", "third" and "fourth", etc. in the claims, the description and the drawings of the present invention are used for distinguishing different objects and are not used for describing a particular order. The terms "comprises" and "comprising," when used in the specification and claims of this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and claims of this application, the singular form of "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the specification and claims of this specification refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.

As used in this specification and claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".

The technical scheme of the invention provides a solution that the non-color mode and the color mode cannot be compatible as a whole. Different from the prior art that the black-white ink screen and the color ink screen can only be independently arranged in the reading terminal, the invention superposes the color filter film on the black-white ink screen, and the reading terminal can switch and display the gray scale picture and the color picture through the modes of image gray scale conversion, component processing and the like. And according to the requirement of the using scene for the refreshing speed, the mode is switched to a non-color mode or a color mode at any time so as to achieve the purpose of presenting more color mode selections.

The following detailed description of embodiments of the invention refers to the accompanying drawings.

An embodiment of the present invention is an electronic device, which is a reading terminal capable of operating and reading an electronic book, and fig. 1 shows a schematic diagram of the reading terminal. The reading terminal may be a mobile terminal for displaying an electronic book, such as a mobile phone, a tablet computer, an e-reader, etc., but is not limited thereto, and may also be another terminal.

As shown in fig. 1, the reading terminal 100 includes: a processor 101, a communication interface 102, a power component 103, a display 104, an audio component 105, a memory 106, and a key interface 107.

The processor 101 may be a central processing unit CPU or a specific integrated circuit ASIC or an integrated circuit configured to implement an embodiment of the invention. Furthermore, the reading terminal 100 can include multiple processors, which can be of the same type or different types of processors, such as multiple CPUs, multiple ASICs, or a CPU plus an ASIC.

The communication interface 102 is configured as a module for wireless communication between the reading terminal 100 and other devices, including bluetooth 112,

WiFi antenna

122, 4G/5G antenna communication 132, and the like. In another embodiment, the communication interface 102 further includes a Near Field Communication (NFC) module to facilitate short-range communications.

The power supply component 103 provides power to the various components of the reading terminal 100. The power supply assembly 103 may include an external power interface 113 and a charging interface circuit 123.

The display 104 is an interactive display interface between the reading terminal 100 and the user, and includes an electromagnetic film 114, a capacitive screen 124, an ink screen 134, a color filter 136, and the like.

The electromagnetic film 114 is used for receiving signals of an electromagnetic pen, and is distinguished by magnetic field changes generated by inductors under an electromagnetic pen operating process and a panel, the electromagnetic pen is a signal transmitting end, the electromagnetic film 114 is a signal receiving end, magnetic flux changes when the electromagnetic pen is close to induction, and position points are defined through operation.

The capacitive screen 124 is a touch screen for receiving signals from a user's finger input and includes one or more touch sensors to detect gestures on the touch, slide and touch screen panels. The touch sensor may detect not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation.

The electromagnetic film 114 and the capacitive screen 124 are collectively referred to as a touch screen 174.

The ink screen 134 is a display screen using electronic ink, also called electronic paper display technology, and has a main structure including a top transparent electrode layer, an electrophoretic layer, and a bottom electrode pixel layer. The electrophoretic layer is internally provided with a plurality of fine microcapsules, the microcapsules are provided with transparent liquid and a plurality of tiny electrophoretic particles, the electrophoretic particles are distributed in the transparent electrophoretic liquid to form a suspension system, the surfaces of the electrophoretic particles are easy to adsorb electric charges, and the particles capable of inducing the electric charges can move under the action of an external electric field.

Specifically, the electrophoretic particles are classified into negatively charged black particles and positively charged white particles. When a positive voltage is applied to the bottom electrode pixel layer, the white particles are repelled to move toward the top transparent electrode layer, and the black particles are attracted to move toward the bottom electrode pixel layer, in which case the pixel appears white. Conversely, when a negative voltage is applied to the bottom electrode pixel layer, the white particles are attracted to move toward the bottom electrode pixel layer, the black particles are repelled to move toward the top transparent electrode layer, and the pixel is displayed as black.

A color filter 136 is superimposed on the ink panel 134, and displays a desired color by additive color mixing by controlling the intensity of reflected light of three primary colors, red (R), green (G), and blue (B). The color filter 136 absorbs other color components by polarization effects, for example, when natural light is irradiated on a red portion of the color filter 136, it absorbs a blue-green component, only a red component is transmitted therethrough, and thus the human eye sees red. The color filter 136 can be printed directly on the ink screen or adhered to the ink screen in a membrane form, and the basic structure of the membrane form color filter includes a filter glass substrate, and each pixel on the filter glass substrate has a color light blocking layer with three primary colors of red, green, and blue. Specifically, the black particles of the ink panel 134 absorb light, and conversely, the white particles reflect light, so that if a red color is to be displayed, the electrode at the red position is charged with positive electricity to attract the black particles downward, and the white particles move toward the top transparent electrode layer, the light reflected by the white particles will display red color through the pixel at the red position corresponding to the color filter 136, and the voltage of the electrode is controlled to control the ratio of the white particles to the black particles on the top transparent electrode layer, thereby controlling the gray scale (brightness) of the pixel and indirectly controlling the shade of the red color. In summary, the movement of the black particles and the white particles in the red, green and blue microcapsules is controlled to control the gray level of the microcapsules, and the color filters 136 are used to display the red, green and blue colors with different shades for color mixing, thereby displaying the color of the specific pixel.

The display 104 also includes a sensing component 144 configured with a plurality of various sensors for providing various aspects of status detection for the electronic device. For example: the temperature sensor 154 in the sensing assembly 144 can detect the temperature change of the display 104, and the detected temperature is transmitted to the processor 101 and then to the timing controller 108 as a parameter for table lookup.

The display 104 further includes a front light and light guide plate 164 disposed at a side of the display 104 to provide a stable and uniform light source.

The audio component 105 is configured to output and/or input audio signals. For example, the audio component 105 includes a microphone 118, and when the reading terminal 100 needs to receive speech, such as a call mode, a recording mode, and a speech recognition mode, the microphone 118 is configured to receive external audio signals. The audio module 105 further comprises a speaker 128 for outputting audio signals.

The memory 106 is used for storing programs, electronic books and notes, and may be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as a disk memory.

The key interface 107 is used for controlling the page turning of the user, and is generally physical keys, which are disposed at the side of the reading terminal 100 and include a front page turning key and a back page turning key.

The timing controller 108 is used for finding out the corresponding control parameter, i.e. the driving waveform, through the lookup table. Since the black and white particles in the ink screen 134 are sensitive to temperature, the lower the temperature, the more viscous the filler fluid between the particles, the greater the resistance to particle movement, and the longer it takes to move to the same location in the microcapsule at room temperature; the particles move faster when the temperature is higher, and the time required to move to the same location in the microcapsule is relatively shorter compared to the time required at normal temperature. The temperature sensor 154 collects temperature data on the display 104, and the timing controller 108 finds corresponding control parameters according to the temperature data to select an appropriate driving waveform.

The display driver 109 converts the driving waveform into a control signal to drive the ink particles on the ink screen 134 to move, so that image data to be displayed can be imaged on the ink screen 134.

The pixel mapping relationship between the ink panel 134 and the color filter 136 is further described below with reference to fig. 2 to 4. Fig. 2 shows a schematic diagram of pixels of an image to be displayed, the image to be displayed is formed by combining colors of pixels, a data structure of the pixels is RGB888, which represents that 8 bytes are used to record a red color value, a green color value and a blue color value respectively, and a value of each color value ranges from 0 to 255. More specifically, the color of one pixel unit 21 of the image to be displayed is formed by mixing three primary colors of RGB emitted by the pixel unit, each pixel has three color components of red, green and blue, and each pixel has a corresponding color value of RGB888, wherein the component refers to an intensity value of each color within a range of 0 to 255.

Fig. 3 is a schematic diagram illustrating a structure of the color filter 136 combined with the ink panel 134 according to an embodiment of the invention, as shown in fig. 3, the color filter 136 is superimposed on the ink panel 134, and one pixel unit 310 is used as a basic unit to express three primary colors, and three adjacent pixels (e.g.,

pixels

321, 322, 323) in the ink panel 134 correspond to the pixel unit 310 of the color filter 136, wherein the

pixels

321, 322, 323 respectively generate three color components of red, green and blue.

Fig. 4 shows a schematic diagram of implementing colors by using a color filter 136 according to an embodiment of the present invention, wherein different colors such as RGB are printed on the color filter 136. In practice, to make the color expression more natural, the RGB arrangement may also be irregular, such as RBG RGB BRG BGR, and the order is predetermined during the manufacture of the color filter 136.

In some implementations, each pixel in the image to be displayed has three color components of RGB, but the position of the color filter 136 corresponding to the pixel can only print one color, and thus the three color components cannot be displayed on the color filter 136 for a single pixel. For the above reasons, this embodiment uses three pixels on the color filter 136 as one pixel unit 310, and sequentially prints three primary colors of RGB. For example, in pixel unit 310, processor 101 uses the red color printed on the first pixel 411 to represent the red color component of ink screen pixel 321 (shown in FIG. 3), and uses the green color printed on the second pixel 412 to represent the green color component of ink screen pixel 322; the blue color printed on the third pixel 413 is used to express the blue color component of the ink screen pixel 323.

Since three pixels on the ink screen 134 are mapped to one pixel unit on the color filter 136, the DPI of the color filter 136 is reduced to one third, and the DPI of the black and white ink screen 134 is generally 300, which becomes 100 after combining the color filter 136.

In more detail, the processor 101 retains the corresponding color component value of the RGB values of the pixel according to the color printed at the corresponding position on the color filter 136, and discards the rest of the color component values. The first pixel 411 of the color filter 136 is printed with red color, which is only used to express the red component of the pixel 321 of the ink panel 134, so that the green component and the blue component are not retained; similarly, the second pixel 412 of the color filter 136 is printed with green color, which is used to express only the green color component of the pixel 322 of the ink screen 134, and the red and blue color components are not retained, and so on.

The processor 101 then converts the remaining color component values into a gray scale value of 16 gray. Because different gray scales have different light and shade effects, the gray scale of a single primary color can be displayed through the color filter film, and when red is taken as an example, the gray scale can be controlled to display deep red, date red, bright red, light red, pink and the like. For one pixel unit, different color effects can be realized by controlling the combination of the gray levels of the three primary colors. In this embodiment, there are 16 shades of each primary color component of RGB, and the number of colors that can be realized by one pixel unit is 16 × 16 for 4096 colors.

Finally, the processor 101 controls the display driver 109 to drive the display of the ink screen 134. The ink screen displays the gray scale of red, green and blue pixels, and the color is mixed by the color filter film 136 to present an original color picture.

The ink screen 134 of this embodiment may also display a switch button for the user to switch between the non-color or color modes. When the user clicks the switch key, the touch screen 174 receives a touch instruction generated by the user clicking the switch key and sends the touch instruction to the processor 101, and the processor 101 responds to the touch instruction to switch the non-color mode or the color mode. If a color picture is being displayed and the user clicks the switching key, the user indicates that the user wants to switch to the non-color mode, and the processor 101 displays the image to be displayed in a gray picture; if the user clicks the switch button to indicate that the user wants to switch to the color mode, the processor 101 displays the image to be displayed in the color screen. The above-mentioned achromatic mode can display 16 gray levels instead of displaying black and white.

The mechanism for switching between achromatic and chromatic colors is described in detail below. The timing controller 108 of this embodiment may be implemented by means of an algorithm, that is, a software timing controller, in addition to being implemented by hardware as shown in fig. 1. The software timing controller is an algorithm integrated on a System-on-a-Chip (SOC Chip), and the process of color converting the gray image to the output of the driving waveform is equivalent to the execution on the SOC Chip.

When switching to the non-color mode, the processor 101 performs a gray scale calculation on an image to be displayed to convert the image into a gray scale image (in this mode, color component values of each pixel do not need to be discarded), and outputs a driving waveform corresponding to the gray scale image through the timing controller 108 to drive the ink screen to display the gray scale picture.

For example, the processor 101 calculates a gray value using three RGB color values of each pixel, and converts the image to be displayed into 8-bit gray data. The calculation mode can be any one of the following modes: 1. floating point method: gray ═ R0.3 + G0.59 + B0.11;

2. integer method: gray ═ (R30 + G59 + B11)/100;

3. a shift method: gray ═ (R77 + G151 + B28) > > 8;

4. average value method: gray ═ R + G + B)/3.

The converted gray value is 8 bits, that is, the gray value range is 0 to 255, and there are 256 different gray levels. Through a preset mapping relationship, the processor 101 converts the gray value of the pixel into a certain one of 16 gray levels, the 16 gray levels take values from 0 to 15, wherein 0 is pure white, 15 is pure black, and the middle values are gray at different depths. After the conversion is completed, gradation data is recorded using 4-bit data.

In more detail, the mapping relationship between 256 gray scales and 16 gray scales in this embodiment is: 0 to 16 of the 256 shades of gray correspond to 0 of 16 shades of gray, 17 to 32 of the 256 shades of gray correspond to 1 of 16 shades of gray, 33 to 48 of the 256 shades of gray correspond to 2 of 16 shades of gray, and so on. The conversion can also be performed by using a non-linear mapping relationship, and each gray scale in the 16 gray scale image is preset to correspond to a gray scale range in 256 gray scales.

The timing controller 108 performs table look-up (LUT) according to parameters such as a previous frame gray value, a next frame gray value, and a current ink screen temperature of each pixel in the 4-bit gray data to obtain a suitable driving waveform for driving the black-and-white particles in each pixel from a current position to a next frame image position, where the driving waveform includes information such as voltage, pulse frequency, and pulse duration, and after the driving waveform is obtained by table look-up, the driving waveform can be used to drive the ink capsules on the ink screen 134 corresponding to the pixel position, so that the black-and-white particles therein move at different distances to form corresponding gray colors. Where temperature data is provided by temperature sensor 154.

And finally, driving the ink screen 134 according to the searched driving waveform to realize the display of the image to be displayed.

Since the ink screen 134 displays images by moving black and white particles, after a plurality of pages are turned, the image sticking is often generated, especially if the page has a picture, the image sticking is more easily generated, and therefore refreshing is required to remove the image sticking so that the page is more concise. The invention adopts a 16-gray local refresh mode or a full-screen refresh mode, and when the afterimage is not serious and the fast refresh is needed, the local refresh mode can be used, for example, GU16 directly outputs 16-gray pixels which are changed with the last output without performing the screen refresh operation before the data output. In some application scenarios, the color ink screen has heavy refreshing afterimage, and a full screen refresh mode may also be used, for example, the GC16 re-outputs all pixels in the refresh area, performs a screen refresh operation on the refresh area before outputting, and can support 16 gray pixels.

In the case of displaying in the non-color mode, the gray scale effect can be displayed in the embodiment with the color filter 136 covered, because the color image is not discarded and retained according to the pixel color arrangement position of the color filter, and therefore the color component represented by the display gray scale of the pixel on the ink screen does not correspond to the color printed on the color filter 136 in the physical space, and therefore the color filter does not perform polarization filtering on the gray scale on the ink screen when the light is reflected, and the color expression capability is lost.

When switching to the color mode, the ink panel 134 displays a color picture by the color on the color filter 136. As previously mentioned, the data structure of the pixels of the image to be displayed is RGB 888. First, the processor 101 performs a quantization process on an image to be displayed to discard and retain a component value of one of red, green and blue pixels, and then converts the formed image into a grayscale image. The purpose of the conversion into the gray scale map is to be adapted to the display of the ink screen 134, the color expression of the image to be displayed is realized by the color filter 136, and the ink screen 134 itself still follows the display mechanism of black and white particles, that is, the ink screen 134 itself cannot directly display the color image, but affects the display effect of the color filter 136 by the depth of the gray scale, so as to realize various colors.

During the quantization process, the processor 101 reserves a component value of one of red, green and blue pixels on the color filter 136 corresponding to a pixel of the image to be displayed, converts the gray scale of the image to be displayed into 8-bit gray scale data according to the component value, and converts the 8-bit gray scale data into 4-bit gray scale data.

In another implementation scenario, where the data structure of some color images is RGBA8888, with an 8-bit transparency value, processor 101 ignores the transparency value directly since the transparency is not reflected by ink screen 134 of this embodiment.

Then, the timing controller 108 outputs a driving waveform corresponding to the gray image to drive the ink screen to display the gray of the rgb pixels, and the color filter film displays the color image according to the gray of the rgb pixels. And finally, driving the ink screen according to the searched driving waveform to realize the refreshing display of the image to be displayed. The refresh mode is as described above and will not be described herein.

Fig. 5 is a flow chart illustrating a method 500 of transforming a display mode of a reading terminal according to an embodiment of the present invention. As shown in fig. 5, this embodiment includes the following steps:

at step 501, an image to be displayed is received. Specifically, the reading terminal of this embodiment receives an image to be displayed.

In step 502, a touch instruction is received, a switching key is displayed on an ink screen of the reading terminal, a user clicks the switching key, and the reading terminal receives the touch instruction generated by the user clicking the switching key.

In step 503, it is determined that the touch command is switched to a non-color mode or a color mode. Specifically, the reading terminal receives the touch instruction to switch the non-color mode or the color mode, if a color picture is displayed and the user clicks the switching key, the user is indicated to switch to the non-color mode, and the reading terminal displays an image to be displayed in a gray scale picture; if the non-color picture is being displayed and the user clicks the switch key, the user indicates that the user wants to switch to the color mode, and the reading terminal displays the image to be displayed in the color picture.

At step 504, the image to be displayed is displayed in a gray scale by using the ink screen when the mode is switched to the non-color mode. The manner of converting the color picture into the gray scale picture has been described in the above embodiments, and is not described again.

At step 505, the image to be displayed is displayed in a color picture by using the ink screen when the color mode is switched. Similarly, the way of performing the quantization processing on the image to be displayed to convert the image into the grayscale image is also described in the above embodiments, and is not described again.

The method 500 outputs a driving waveform corresponding to the gray image to drive an ink screen to display the gray of the red, green and blue pixels, and the color filter film displays the color image according to the gray of the red, green and blue pixels.

Next, the method 500 performs table lookup according to parameters such as a previous frame gray value, a next frame gray value, and a current ink screen temperature of each pixel in the 4-bit gray data to obtain a suitable driving waveform for driving the black-and-white particles in each pixel from the current position to the next frame image position, where the driving waveform includes information such as voltage, pulse frequency, and pulse duration, and after the driving waveform is obtained by table lookup, the driving waveform can be used to drive the ink capsules corresponding to the pixel position on the ink screen, so that the black-and-white particles in the ink capsules move at different distances to form corresponding gray colors. And finally, driving the ink screen according to the searched driving waveform to realize the refreshing display of the image to be displayed.

The color image display effect can make the residual image heavier and the refresh speed slower, so when there is no color image display requirement, the invention can achieve the purpose of automatically switching to the non-color mode by setting the following conditions in advance, and adopts the non-color mode for display. These conditions may be:

1. judging whether the image to be displayed contains picture content by utilizing an image identification technology, and if so, using a color mode; if not, the non-color mode is used.

2. When the processor judges that the reading page is entered (no or few pictures exist in the reading page), a non-color mode is adopted; but if the color mode is used in the interfaces of the bookshelf and the book city, the color mode is still used.

3. If the image to be displayed does not contain color colors, the non-color mode is adopted.

Specifically, if the color values of the RGB three color components of each pixel of the image to be displayed meet the predetermined color value requirements, a non-color mode is used, for example, the RGB values of all pixels are 0 (black) or 255 (white) respectively, or the RGB three color values are combined to be some gray color. In other words, when the image to be displayed is detected to be in the gray format, the mode is automatically switched to the non-color mode.

In addition, the invention can also automatically switch to the non-colorful mode in the use scene sensitive to the refresh rate. The applicable scenarios are as follows:

1. when the handwritten newspaper point data is detected, the newspaper point data is coordinates of the handwritten newspaper point in the page, and the newspaper point data is transmitted and image information is transmitted. Because the handwriting function has high requirement on the refreshing speed to meet the same effect as hand feeling, a non-color mode is adopted to improve the refreshing rate.

2. As the user continues to turn pages.

3. When the video is played.

4. The user slides the waterfall page.

Specifically, when the processor detects that the bit is in a scene where the ghost is likely to occur, a high refresh rate is required and the mode is automatically switched to the non-color mode.

Furthermore, a computer-readable storage medium is disclosed, comprising a computer program for switchable display modes, which when executed by a processor performs the method according to the method described in connection with fig. 5 and its various embodiments.

It should also be appreciated that any module, unit, component, server, computer, terminal, or device executing instructions exemplified herein may include or otherwise have access to a computer-readable medium, such as a storage medium, computer storage medium, or data storage device (removable and/or non-removable) such as a magnetic disk, optical disk, or tape. Computer storage media may include volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information, such as computer readable instructions, data structures, program modules or other data.

Examples of computer storage media include RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by an application, a module, or both. Any such computer storage media may be part of, or accessible or connectable to, a device. Any application or module described herein may be implemented using computer-readable/executable instructions stored or otherwise maintained by such computer-readable media.

The technical scheme of the invention can enable the reading terminal to have the non-color mode and the color mode at the same time, and the user can randomly select and switch the non-color mode or the color mode according to the reading content. Finally, the invention further provides automatic mode switching, the processor can automatically select to display the image in a gray scale or a color picture according to the requirement of the current scene on the refresh rate through the preset condition setting, and the reading terminal can achieve the aim of flexibly selecting and displaying the gray scale or the color picture and can not influence the refresh rate.

Although the embodiments of the present invention are described above, the descriptions are only examples for facilitating understanding of the present invention, and are not intended to limit the scope and application scenarios of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A reading terminal capable of changing display modes, comprising:

the ink screen is used for displaying an image to be displayed and switching the keys;

the color filter film is arranged on the ink screen and is provided with a plurality of pixel units, wherein each pixel unit comprises red, green and blue pixels and is used for displaying the color of the image to be displayed;

the touch screen is used for receiving a touch instruction generated by clicking the switching key by a user; and

the processor is used for responding to the touch instruction to switch a non-color mode or a color mode; when the mode is switched to the non-color mode, displaying the image to be displayed in a gray scale picture; when the color mode is switched to, displaying the image to be displayed in a color picture;

wherein displaying the image to be displayed in a color picture comprises: performing quantization processing on the image to be displayed to convert the image to be displayed into a gray image, and outputting a driving waveform corresponding to the gray image to drive the ink screen to display the gray of the red, green and blue pixels; and presenting the color picture according to the gray scale of the red, green and blue pixels.

2. The reading terminal of claim 1, wherein the non-color mode is automatically switched to when the processor detects that the image to be displayed is in a gray scale format.

3. The reading terminal of claim 1, further comprising:

and the time sequence controller is used for looking up a table according to the temperature of the ink screen and outputting a driving waveform corresponding to an image to be displayed so as to drive the ink screen to display a picture.

4. The reading terminal of claim 3, wherein when switching to the non-color mode, the processor performs a gray scale calculation on the image to be displayed to convert the image to a gray scale image, and outputs a driving waveform corresponding to the gray scale image to drive the ink screen to display the gray scale image through the timing controller.

5. The reading terminal of claim 4, wherein the processor converts the image to be displayed into 8-bit gray scale data using a floating point method, an integer method, a shift method, or an average method.

6. The reading terminal of claim 5, wherein the processor converts the 8-bit gray scale data into 4-bit gray scale data, and the timing controller outputs the driving waveform according to the 4-bit gray scale data.

7. The reading terminal of claim 3, wherein the processor outputs a driving waveform corresponding to the gray image to drive the ink panel to display the gray of the RGB pixels through the timing controller when switching to the color mode, and the color filter is configured to display the color image according to the gray of the RGB pixels.

8. The reading terminal of claim 7, wherein the processor retains component values of pixels of the image to be displayed corresponding to one of the rgb pixels on the color filter during the quantization process.

9. The reading terminal of claim 8, wherein the processor converts the image to be displayed according to the component values into 8-bit grayscale data.

10. The reading terminal of claim 9, wherein the processor converts the 8-bit gray scale data into 4-bit gray scale data, and the timing controller outputs the driving waveform according to the 4-bit gray scale data.

11. The reading terminal of claim 1, wherein the color filter is printed or affixed to the ink screen.

12. A method of changing a display mode of a reading terminal, the reading terminal including an ink screen, the method comprising:

receiving an image to be displayed;

receiving a touch instruction;

judging whether the touch instruction is switched into a non-color mode or a color mode;

if the mode is switched to the non-color mode, the image to be displayed is displayed by a gray picture by using the ink screen; and

if the color mode is switched to, displaying the image to be displayed in a color picture by using the ink screen;

wherein, the step of displaying the image to be displayed in a color picture by using the ink screen comprises the following steps:

carrying out quantization processing on the image to be displayed so as to convert the image to be displayed into a gray image;

outputting a driving waveform corresponding to the gray level image to drive an ink screen to display the gray levels of the red, green and blue pixels; and

and presenting the color picture according to the gray scale of the red, green and blue pixels.

13. The method of claim 12, further comprising:

and judging whether the image to be displayed is in a gray scale format, if so, automatically switching to the non-color mode.

14. The method according to claim 12, wherein the step of displaying the image to be displayed in a gray scale screen by using the ink screen comprises:

performing gray scale calculation on the image to be displayed so as to convert the image to be displayed into a gray scale image; and

and outputting a driving waveform corresponding to the gray level image to drive the ink screen to display the gray level image.

15. The method of claim 14, wherein the step of performing gray scale calculation is to convert the image to be displayed into 8-bit gray scale data by using a floating point method, an integer method, a shift method or an average value method.

16. The method of claim 15, wherein the step of performing a gray scale calculation comprises:

converting the 8-bit gray scale data into 4-bit gray scale data;

wherein the step of outputting a driving waveform corresponding to the gray scale image is outputting the driving waveform according to the 4-bit gray scale data.

17. The method of claim 12, wherein the reading terminal further comprises a color filter, and wherein the step of performing a quantization process comprises retaining component values of pixels of the image to be displayed corresponding to one of red, green and blue pixels on the color filter.

18. The method according to claim 17, wherein said performing of the quantization processing includes performing a gray-scale conversion of the image to be displayed into 8-bit gray-scale data according to the component value.

19. The method of claim 18, wherein the step of performing a quantization process further comprises:

converting the 8-bit gray scale data into 4-bit gray scale data;

20. The method of claim 12, further comprising:

judging whether the image to be displayed comprises handwritten newspaper point data, continuous page turning, video playing or sliding waterfall flow pages; and

if yes, automatically switching to the non-color mode.

21. A computer readable storage medium having stored thereon a computer program code for transforming a display mode of a reading terminal, which when executed by a processor performs the method according to any of claims 12 to 20.