A three-color electronic paper low-temperature blooming solution

Abstract

The application provides a three-color electronic paper low-temperature blooming solution, which effectively solves the problem of electronic paper low-temperature character blooming. According to the adjustment of the driving waveform according to the display state of the three-color particles, the adjustment process includes setting the level of the charged particles in the vibration area; if the black color of the black background part is deeper, and the white color and red color characters are shallower, then: the level of four steps in the vibration area of the black color waveform is set to 0; if the white color of the white background part is reddish, and the red color character is shallower, then: the first step in the vibration area of the white color waveform is given a positive level, the second step is 0 level, and the third step and the fourth step are given a negative level; if the black character of the red background part has a white edge, then: in the vibration area of the red color waveform, a plurality of steps are evenly divided into two groups, and the two groups are given levels with opposite positive and negative polarities and the same amplitude, so that the particles are uniformly distributed. The adjustment process further includes setting the power supply sequence of the three-color particles in the display area of the waveform and adjusting the display state of the three-color particles by different levels.

Description

Technical Field

[0001] This invention relates to the field of electronic paper display technology, and more particularly to a solution for low-temperature blooming of three-color electronic paper. Background Technology

[0002] Three-color electronic paper technology is a "microcup display technology" that uses black, white, and red as its colors. Its basic principle is that charged nanoparticles suspended in a liquid migrate under the influence of an electric field. The series of voltage sequences that control the direction of the electric field is the electronic paper's driving waveform. By controlling the position of the particles within the microcup using the driving waveform, different colors are displayed. Waveform adjustments are made to ensure good display effects for the electronic paper products. The quality of each batch of newly produced electronic paper will vary slightly, and there will also be slight differences in the manufacturing process. Therefore, we need to modify the waveform to correct these differences and ensure that each batch of products achieves the same display effect. Some products may exhibit low-temperature character blooming.

[0003] The aforementioned low-temperature character blooming phenomenon refers to the blurring of characters on electronic paper products at low temperatures. This phenomenon indicates that particle movement is slower and particle distribution is uneven at low temperatures, causing characters to fail to display. This slow particle movement and character blooming phenomenon is related to the manufacturing process. In such cases, if normal rendering is used, black characters will be too dark, resulting in red text on a black background, white text will be unclear, red text on a white background will not be fully displayed, and black text on a red background will have white borders. Summary of the Invention

[0004] To address the technical problems in the background art, this invention provides a solution for low-temperature blooming of three-color electronic paper, effectively solving the problem of low-temperature character smudging in electronic paper.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] A solution for low-temperature blooming in three-color electronic paper includes the following steps:

[0007] Step 1: Determine the display status of the black, white, and red particles;

[0008] Step 2: Adjust the driving waveform according to the three-color particle display status. The adjustment process includes setting a positive, negative, or 0 level for the charged particles in the vibration zone of the waveform; the vibration zone is cycled multiple times in groups of at least four steps, and the following settings are made in each group of at least four steps:

[0009] 1) If the black background part is darker in black and the white and red characters are lighter, then: set the levels of four steps in the black waveform vibration area to 0; at this time: the particles in the black waveform vibration area are not powered, the black particles do not move, the black background becomes lighter, and the white and red characters become clearer;

[0010] 2) If the white background part is reddish and the red characters are lighter, then: give a positive level to the first step in the white waveform vibration area, a 0 level to the second step, and negative levels to the third and fourth steps; at this time: the red particles move downward, the white background becomes whiter, and the red characters are relatively clearer;

[0011] 3) If there are white edges on the black characters in the red background part, then: in the red waveform vibration area, divide multiple steps evenly into two groups, and give levels with opposite polarities and the same amplitude to the two groups to make the particles evenly distributed.

[0012] Step 3: The adjustment process also includes setting the power supply order of the three-color particles and adjusting the display states of the three-color particles with different positive and negative levels in the display area of the waveform; the display area includes multiple steps;

[0013] 1) In the display area of the waveform, first give at least one step of positive level to the black particles, mark the waveform as N6, and then give a 0 level. After this waveform continuously loops for a set number of times, continue to give at least one step of positive level, mark the waveform as N7, and then give a 0 level. At this time, the black particles are on top and the black is normally displayed;

[0014] 2) In the display area of the waveform, first give a 0 level to the white particles, and then give at least two steps of negative level to the white particles, mark the waveform as N8, and then give a 0 level. After this waveform continuously loops for a set number of times, continue to give a 0 level. At this time, the white particles are on top and the white is normally displayed;

[0015] 3) In the display area of the waveform, first give a 0 level to the red particles, and then give at least two steps of negative level A to the red particles, mark the waveform as N9. At this time, the black particles are smaller, the black particles move downward, and the white particles move upward. Then give at least one step of positive level B to the red particles, mark the waveform as N11, B < A. After this waveform continuously loops for a set number of times, at this time, the red particles are on top and the red is excellent;

[0016] Step 4: In the voltage balancing area of the waveform, give a voltage with the opposite polarity to the self-voltage of the charged particles to neutralize the polarity.

[0017] Further, in the above Step 3, the position and step settings of waveform N8 are: the step of N8 is greater than the step of N6, and when the black particles are at a positive level, that is, in the N6 position, the white particles cannot be at a negative level, that is, cannot be in the N8 position, that is, the N8 position is staggered from the corresponding position of N6.

[0018] Furthermore, in step three, the position of waveform N9 is set as follows: when the black particle is at a positive level, i.e., at position N6, the red particle cannot be at a negative level, i.e., cannot be at position N9. That is, the corresponding positions of N9 and N6 are offset.

[0019] Furthermore, the voltage waveform applied to the charged particles is a square wave.

[0020] Furthermore, the voltage waveform in the display area is cycled multiple times in groups of four steps, and then cycled again in groups of four steps. The waveforms marked N6 and N8 are both in the first four steps, and the waveform marked N7 is in the last four steps.

[0021] Furthermore, in step 3), after the waveforms of N9 and N11 have been cycled multiple times, the following settings are also made:

[0022] Give the red particle a negative level for at least one step, the waveform is labeled N10, then the level is 0, and then give the red particle a positive level for at least one step, the waveform is labeled N12. The waveforms labeled N9 and N11 are in the first four steps, and the waveforms labeled N10 and N12 are in the last four steps.

[0023] Furthermore, the step size of N10 is set to be smaller than the step size of N9.

[0024] Furthermore, in step three, to avoid white borders on black characters in the red display area, the step size of N12 is set to be greater than the step size of N11.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] This invention is a versatile driving waveform debugging method that is effective for low-temperature display of black, white, and red characters. It can solve the problem of low-temperature blooming of characters in three-color products. Attached Figure Description

[0027] Figure 1 This is a timing diagram of the driving voltage of the present invention;

[0028] Figure 2 This is a diagram showing the state of the electronic paper display before the debugging method of the present invention.

[0029] Figure 3 This is a diagram showing the state of the electronic paper display after the debugging method of the present invention. Detailed Implementation

[0030] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0031] like Figure 1As shown, a solution for low-temperature blooming in three-color electronic paper includes the following steps:

[0032] Step 1: Determine the display status of the black, white, and red particles; refer to... Figure 2 ;

[0033] Step Two: Adjust the driving waveform according to the three-color particle display status. The adjustment process includes setting a positive, negative, or 0 level for the charged particles in the vibration zone of the waveform; the vibration zone is cycled multiple times in groups of at least four steps. Within each group of at least four steps, see... Figure 1 The following settings should be made for Part ②:

[0034] 1) If the black background is darker and the white and red characters are lighter, then: set the level of the four steps in the black waveform vibration area to 0. Figure 1 The waveform is marked as N1; at this time: the particles in the black waveform vibration zone are not charged, the black particles are not moving, the black background color becomes lighter, and the white and red characters are clearer;

[0035] 2) If the white background appears reddish and the red characters are light, then: apply a positive level to the first step of the white waveform vibration zone. Figure 1 The waveform in the middle step is marked as N2, and the second step is at a 0 level; the third and fourth steps are given a negative level, and the waveform is marked as N3; at this time: the red particles move downwards, the white background becomes whiter, and the red characters become relatively clearer;

[0036] 3) If the black text on a red background has a white border, then: within the red waveform vibration zone, divide the multiple step sizes into two groups, and assign each group a voltage level with opposite polarities and the same amplitude. Figure 1 The positive polarity waveform is marked as N4. Figure 1 The negative polarity waveform is marked as N5 to ensure uniform particle distribution.

[0037] In this embodiment, the absolute values ​​of the positive and negative levels of the black, white, and red colors set in step two are all equal, and the voltage waveforms applied to the charged particles are all square waves.

[0038] Step 3: The adjustment process also includes setting the power supply sequence of the three-color particles and adjusting the display state of the three-color particles with different positive and negative levels in the waveform display area; the display area includes multiple step sizes; Reference Figure 1 The following adjustments are made to parts ③ and ④:

[0039] 1) First, apply a positive level of at least one step to the black particles in the waveform display area. Figure 1 The waveform is marked as N6, then returns to a 0 level. This waveform is continuously cycled a set number of times, and then a positive level of at least one step is applied. Figure 1The middle waveform is marked as N7, and then it becomes the 0 level. At this time, the black particles are on top and the black color is normally displayed;

[0040] 2) First give the white particles a 0 level in the display area of the waveform, and then give the white particles a negative level of at least two steps; Figure 1 The middle waveform is marked as N8, and then it becomes the 0 level. After this waveform continuously cycles for a set number of times, it continues to be the 0 level. At this time, the white particles are on top and the white color is normally displayed;

[0041] 3) First give the red particles a 0 level in the display area of the waveform, and then give the red particles a negative level A of at least two steps; Figure 1 The middle waveform is marked as N9. At this time, the black particles are smaller, the black particles move downward, and the white particles move upward. Then give the red particles a positive level B of at least one step; Figure 1 The middle waveform is marked as N11, B < A, and then it becomes the 0 level. After this waveform continuously cycles for a set number of times, at this time, the red particles are on top and the red color is excellent;

[0042] Step Four: Refer to Figure 1 In the first part of [], give the charged particles a voltage with the opposite polarity to their own voltage in the voltage balancing area of the waveform to neutralize the polarity.

[0043] In this embodiment, the voltage waveforms given to the charged particles are all square waves.

[0044] In this embodiment, the waveform in the voltage balancing area of the first part cycles once, the waveform in the vibration area of the second part cycles 30 times, the waveform in the display area of the third part cycles 8 times, and the waveform in the display area of the fourth part cycles 1 time.

[0045] In this embodiment, the voltage waveform in the display area cycles 8 times with the first four steps as a group (i.e., the third part), and then cycles once again with the next four steps as a group for the fourth part. The waveform marked as N6 and the waveform marked as N8 are both in the third part, and the waveform marked as N7 is in the fourth part.

[0046] In this embodiment, the specific details of the third and fourth parts of the display area are as follows:

[0047] 1) First give the black charged particles a positive voltage in the third part of the display area, marked as N6. After a period of time, continue to give a positive voltage in the fourth part of the display area, marked as N7. The black particles move upward and the black color is normally displayed;

[0048] 2) Give the white charged particles a negative voltage N8 in the third part of the display area, N8 > N6. The white particles are on top and the white color is excellent. Do not give any level in the fourth part of the display area, and the white particles do not move. The black and red waveforms are normally excellent, making the black and red characters on the white background part more clearly visible;

[0049] 3) In display areas ③ and ④, first apply negative voltages to the red charged particles, marked as N9 and N10 respectively. The black particles are smaller and move downward, while the white particles move upward. Then apply small positive voltages to the charged particles, marked as N11 and N12 respectively. With the red particles on top and showing well, under the condition of meeting the chromaticity requirements, the step sizes of N9 and N10 should be as small as possible, and the step size of N10 < the step size of N9.

[0050] In step 3 described above, the position and step size of waveform N8 are set as follows: the step size of N8 is greater than the step size of N6, and when the black particles are at the positive level (i.e., at the N6 position), the white particles cannot be at the negative level (i.e., cannot be at the N8 position), that is, the position of N8 is错开 from the corresponding position of N6.

[0051] In step 3 described above, the position of waveform N9 is set as follows: when the black particles are at the positive level (i.e., at the N6 position), the red particles cannot be at the negative level (i.e., cannot be at the N9 position), that is, the position of N9 is错开 from the corresponding position of N6.

[0052] In step 3 described above, the duration of applying negative voltage to the red particles in the display area should be as short as possible, the step sizes of N9 and N10 should be as small as possible, and the step size of N10 is less than the step size of N9.

[0053] In step 3 described above, in the red display area, to avoid white edges on black characters, set the step size of N12 to be greater than the step size of N11.

[0054] Figure 2 , Figure 3 This is a comparison diagram of the electronic paper display states before and after the debugging method of the present invention.

[0055] Next, use the improved waveform to test the optical values (L value, A value) of the same three - color electronic paper module at low temperature.

[0056] The data is as follows:

[0057]

[0058] Due to different batches, there are slight differences in the production process of electronic paper, resulting in differences in the quality of electronic paper. For some electronic paper products, character blooming occurs at low temperature. This phenomenon indicates that the particle movement is relatively slow at low temperature, and the particle distribution is uneven, resulting in the characters not being displayed clearly. This slow particle movement and character blooming phenomenon are related to the manufacturing process. In this case, if the normal display method is used, the black characters will be too dark, with black background and red characters, white characters will not be displayed clearly, white background and red characters cannot be fully displayed, and there will be white edges on red background and black characters.

[0059] The principle of this invention is explained as follows: In order to improve the phenomenon of low-temperature character bleeding, this application provides a method in the driving waveform section to adopt segmented brightening for different character display effects. Brightening is performed according to the actual display effect of the character, with darker colors being brightened less and lighter colors being brightened more, so that the three types of particles reach a balanced state. Since the black, white and red particles have different volumes, the brightening step size and number of times for the three colors are also different. By adjusting the brightening number and step size, the three colors of black, white and red can be displayed normally, thereby solving the problem of low-temperature character Blooming.

[0060] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A solution for low-temperature blooming in three-color electronic paper, characterized in that, It includes the following steps: Step 1: Determine the display states of black, white, and red particles. Step 2: Adjust the driving waveform according to the display states of the three-color particles. The adjustment process includes setting positive level, negative level or 0 level for charged particles in the vibration area of the waveform. The vibration area is cycled multiple times in groups of four-step lengths. In each group of four-step lengths, the following settings are made: If the black part of the black background is darker and the white and red characters are lighter, then: Set the levels of the four steps in the vibration area of the black waveform to 0. At this time: The particles in the vibration area of the black waveform are not powered, the black particles do not move, the black background becomes lighter, and the white and red characters become clearer. If the white background part is reddish and the red characters are lighter, then: Give a positive level to the first step in the vibration area of the white waveform, 0 level to the second step, and negative levels to the third and fourth steps. At this time: The red particles move downward, the white background becomes whiter, and the red characters are relatively clearer. If there is a white edge around the black characters on the red background part, then: In the vibration area of the red waveform, divide multiple step lengths into two groups evenly, and give levels with opposite polarities and the same amplitude to the two groups to make the particles evenly distributed. Step 3: The adjustment process also includes setting the power supply order of the three-color particles and adjusting the display states of the three-color particles with different positive and negative levels in the display area of the waveform. The display area includes multiple step lengths. 1) First give the black particles at least one step length of positive level in the display area of the waveform, and mark the waveform as N6, then 0 level. After this waveform continues to cycle for a set number of times, continue to give at least one step length of positive level, and mark the waveform as N7, then 0 level. At this time, the black particles are on top and the black is normally displayed. 2) First give the white particles 0 level in the display area of the waveform, and then give the white particles at least two step lengths of negative level, mark the waveform as N8, then 0 level. After this waveform continues to cycle for a set number of times, continue to be 0 level. At this time, the white particles are on top and the white is normally displayed. 3) First give the red particles 0 level in the display area of the waveform, and then give the red particles at least two step lengths of negative level A, mark the waveform as N9. At this time, the black particles move downward and the white particles move upward. Then give the red particles at least one step length of positive level B, mark the waveform as N11, B < A. After this waveform continues to cycle for a set number of times, at this time, the red particles are on top and the red is excellent. Step 4: Give a voltage with the opposite voltage polarity to the charged particles themselves in the voltage leveling area of the waveform to neutralize the polarity.

2. The solution for low-temperature blooming of three-color electronic paper according to claim 1, characterized in that, In the above Step 3, the position and step length of waveform N8 are set as follows: The step length of N8 is greater than that of N6, and when the black particles are at the positive level, that is, in the N6 position, the white particles cannot be at the negative level, that is, cannot be in the N8 position, that is, the N8 position is staggered from the corresponding position of N6.

3. The solution for low-temperature blooming of three-color electronic paper according to claim 1, characterized in that, In the above Step 3, the position of waveform N9 is set as follows: When the black particles are at the positive level, that is, in the N6 position, the red particles cannot be at the negative level, that is, cannot be in the N9 position, that is, the N9 position is staggered from the corresponding position of N6.

4. The solution for low-temperature blooming of three-color electronic paper according to claim 1, characterized in that, The voltage waveforms given to the charged particles are all square waves.

5. The solution for low-temperature blooming of three-color electronic paper according to claim 1, characterized in that, The voltage waveform in the display area is cycled multiple times in groups of four steps, and then cycled again in groups of four steps. The waveforms marked N6 and N8 are both in the first four steps, and the waveform marked N7 is in the last four steps.

6. The solution for low-temperature blooming of three-color electronic paper according to claim 5, characterized in that, In step 3), after the waveforms of N9 and N11 have been cycled multiple times, the following settings are also made: Give the red particle a negative level for at least one step, the waveform is labeled N10, then the level is 0, and then give the red particle a positive level for at least one step, the waveform is labeled N12. The waveforms labeled N9 and N11 are in the first four steps, and the waveforms labeled N10 and N12 are in the last four steps.

7. The solution for low-temperature blooming of three-color electronic paper according to claim 6, characterized in that, Set the step size of N10 to be smaller than the step size of N9.

8. The solution for low-temperature blooming of three-color electronic paper according to claim 6, characterized in that, In step three, in the red display area, to avoid white borders on black characters, the step size of N12 is set to be larger than the step size of N11.

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