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CN-122016724-A - Reflection sampling method, system and device of electronic paper and electronic paper

CN122016724ACN 122016724 ACN122016724 ACN 122016724ACN-122016724-A

Abstract

The invention discloses a reflection sampling method, a system, a device and electronic paper of electronic paper, which relate to the field of optical signal processing and comprise the steps of determining an electronic paper area to be detected and a front light partition corresponding to the electronic paper area to be detected, respectively controlling the front light partition to emit light to the corresponding electronic paper area to be detected in a first driving state and a second driving state, determining a reflection representation value according to light reflected by the electronic paper area to be detected in the first driving state and the second driving state, environment reference light and driving parameters of the front light partition, and outputting the reflection representation value when the light reflected by the electronic paper area to be detected in the first driving state and the second driving state is in a corresponding value range. Through twice sampling, the interference factors of the front light partition are determined, the interference factors of the environment are removed by combining the environment reference light, and the influence of the factors such as the direct light of the front light or the change of the environment light is considered. And the abnormal value which is not in the value range is removed, and the finally determined reflection characterization value is more accurate, so that the front light is more accurately controlled.

Inventors

  • CHEN HUITING

Assignees

  • 安徽煜图科技有限公司

Dates

Publication Date
20260512
Application Date
20260318

Claims (10)

  1. 1. The reflection sampling method of the electronic paper is characterized by comprising the following steps of: Determining a region of electronic paper to be detected and a front light partition corresponding to the region of the electronic paper to be detected; Respectively controlling the front light partition to respectively emit light to the corresponding electronic paper area to be tested in a first driving state and a second driving state, wherein the brightness of the front light partition in the first driving state is higher than that of the front light partition in the second driving state; Determining a reflection characterization value according to the light reflected by the electronic paper area to be tested, the environment reference light and the driving parameters of the front light partition in the first driving state and the second driving state; and outputting the reflection characterization value when the light reflected by the electronic paper area to be tested in the first driving state and the second driving state is in the corresponding value range.
  2. 2. The method for reflection sampling of electronic paper according to claim 1, wherein determining an electronic paper area to be measured and a front light partition corresponding to the electronic paper area to be measured comprises: Any front light partition is lightened, an electronic paper area with the largest brightness change is determined to be used as an electronic paper area to be tested in the process of the front light partition, and the lightened front light partition is used as a front light partition corresponding to the electronic paper area to be tested; Or determining the electronic paper area to be tested and the corresponding front light partition according to the position relation between the electronic paper and the front light partition.
  3. 3. The method for reflection sampling of electronic paper according to claim 1, wherein after controlling the front light partition to emit light to the corresponding electronic paper area to be tested in the first driving state and the second driving state, respectively, further comprises: setting an initial sampling period; Adjusting the initial sampling period until the obtained change frequency of the light reflected by the electronic paper area to be detected is lower than or equal to a preset frequency; sampling the electronic paper area to be tested according to the adjusted initial sampling period; and taking an average value of the light reflected by the electronic paper area to be tested, which is collected in the initial sampling period after a plurality of adjustments, and taking the average value as the light reflected by the electronic paper area to be tested in the first driving state and the second driving state.
  4. 4. The method for reflection sampling of electronic paper according to claim 1, wherein determining the reflection characterization value according to the light reflected by the electronic paper area to be measured, the environmental reference light, and the driving parameters of the front light partition in the first driving state and the second driving state comprises: Determining the light reflected by the electronic paper area to be tested in the first driving state And the light reflected by the electronic paper area to be tested in the second driving state ; Determining a differential value of the front light partition, wherein the differential value is expressed as ; Determining a reflection characterization value according to the differential value, the environment reference light and the driving parameters of the front light partition, wherein the expression of the reflection characterization value is that ; Wherein, the In order to reflect the characteristic value of the light, In order to map the function of the function, As a difference value of the values of the differences, In order to compensate for the coefficient of the coefficient, As a reference value for the environment, Driving parameters for the front light partition.
  5. 5. The method for sampling reflection of electronic paper according to claim 1, wherein outputting the reflection characterization value when the light reflected by the electronic paper area to be measured in the first driving state and the second driving state is within the corresponding value range comprises: Judging whether the difference value of the light reflected by the electronic paper area to be tested in the first driving state and the second driving state is in a corresponding value range or not; if yes, entering a step of outputting the reflection characterization value; If the difference value is larger than the maximum value of the value range, reducing the brightness of the front light partition corresponding to the first driving state or the second driving state; If the difference value is smaller than the minimum value of the value range and is a positive value, the brightness of the front light partition corresponding to the first driving state or the second driving state is improved; And if the difference value is a negative value, returning to the step of respectively controlling the front light partition to respectively emit light to the corresponding electronic paper area to be detected in the first driving state and the second driving state.
  6. 6. The method for reflection sampling of electronic paper according to claim 5, wherein determining whether the difference value of the light reflected by the electronic paper area to be tested in the first driving state and the second driving state is within the corresponding value range further comprises: Determining the mean and deviation of the differential values over a plurality of sampling periods; determining outliers in the differential values according to the mean and the deviation; rejecting the outliers; The step of judging whether the difference value of the light reflected by the electronic paper area to be tested in the first driving state and the second driving state is in the corresponding value range comprises the following steps: and judging whether the differential value after the outliers are removed is in the corresponding value range.
  7. 7. The method for reflection sampling of electronic paper according to any one of claims 1 to 6, wherein controlling the front light partition to emit light to the corresponding electronic paper area to be tested in the first driving state and the second driving state, respectively, comprises: modulating the output of each front light partition, wherein the output brightness of the modulated front light partition is ; Wherein, the The output brightness of the front light partition after the modulation at the time t, In order for the brightness to be desired, For the dithering coefficient to be a function of the dithering coefficient, A jitter sequence at time t; before determining the reflection characterization value according to the light reflected by the electronic paper area to be tested, the environment reference light and the driving parameters of the front light partition in the first driving state and the second driving state, the method further comprises: Demodulating the collected light reflected by the electronic paper area to be tested, wherein the light reflected by the electronic paper area to be tested after demodulation is ; Wherein, the For the light reflected by the electronic paper area to be measured after demodulation, And the light reflected by the electronic paper area to be detected is collected at the time t.
  8. 8. A reflection sampling system for electronic paper, comprising: The area determining unit is used for determining a front light partition corresponding to the electronic paper area to be detected; The light-emitting driving unit is used for respectively controlling the front light partition to emit light to the corresponding electronic paper area to be detected in a first driving state and a second driving state, and the brightness of the front light partition in the first driving state is higher than that of the front light partition in the second driving state; The reflection characterization value determining unit is used for determining a reflection characterization value according to the light reflected by the electronic paper area to be detected, the environment reference light and the driving parameters of the front light partition in the first driving state and the second driving state; And the output judging unit is used for outputting the reflection characterization value when the light reflected by the electronic paper area to be tested in the first driving state and the second driving state is in the corresponding value range.
  9. 9. The utility model provides a reflection sampling device of electronic paper which characterized in that includes: A memory for storing a computer program; a processor for implementing the steps of the reflection sampling method of electronic paper according to any one of claims 1 to 7 when executing the computer program.
  10. 10. An electronic paper comprising the reflection sampling device of the electronic paper according to claim 9.

Description

Reflection sampling method, system and device of electronic paper and electronic paper Technical Field The present invention relates to the field of optical signal processing, and in particular, to a method, a system, a device, and an electronic paper for reflection sampling of electronic paper. Background Electronic paper is a reflective display technology that relies on reflected ambient light for imaging rather than active light emission. The electronic paper has no active light-emitting capability and cannot be displayed normally in a weak light or dark environment, so that the electronic paper needs to be matched with front light for light supplement, and light rays emitted by the front light irradiate the surface of the electronic paper and are received by human eyes after being reflected by particles, so that display in the weak light is realized. In order to achieve the display effect of the electronic paper, feedback control is needed to be performed on the front light based on the feedback quantity of the electronic paper, but the reading of a sensor for collecting the feedback quantity is often influenced by factors such as direct front light or ambient light change, so that closed loop is unstable or misjudgment is caused, and the front light is controlled inaccurately. Disclosure of Invention The invention aims to provide a reflection sampling method, a system and a device of electronic paper and the electronic paper, wherein interference factors of front light subareas are determined through twice sampling, the interference factors of the environment are removed by combining with environment reference light, and the influence of factors such as front light direct light or environment light change is considered. And the abnormal value which is not in the value range is removed, and the finally determined reflection characterization value is more accurate, so that the front light is more accurately controlled. In order to solve the technical problems, the invention provides a reflection sampling method of electronic paper, which comprises the following steps: Determining a region of electronic paper to be detected and a front light partition corresponding to the region of the electronic paper to be detected; Respectively controlling the front light partition to respectively emit light to the corresponding electronic paper area to be tested in a first driving state and a second driving state, wherein the brightness of the front light partition in the first driving state is higher than that of the front light partition in the second driving state; Determining a reflection characterization value according to the light reflected by the electronic paper area to be tested, the environment reference light and the driving parameters of the front light partition in the first driving state and the second driving state; and outputting the reflection characterization value when the light reflected by the electronic paper area to be tested in the first driving state and the second driving state is in the corresponding value range. On the other hand, determining the electronic paper area to be measured and the front light partition corresponding to the electronic paper area to be measured includes: Any front light partition is lightened, an electronic paper area with the largest brightness change is determined to be used as an electronic paper area to be tested in the process of the front light partition, and the lightened front light partition is used as a front light partition corresponding to the electronic paper area to be tested; Or determining the electronic paper area to be tested and the corresponding front light partition according to the position relation between the electronic paper and the front light partition. On the other hand, after the front light partition is respectively controlled to respectively emit light to the corresponding electronic paper area to be tested in the first driving state and the second driving state, the method further comprises the following steps: setting an initial sampling period; Adjusting the initial sampling period until the obtained change frequency of the light reflected by the electronic paper area to be detected is lower than or equal to a preset frequency; sampling the electronic paper area to be tested according to the adjusted initial sampling period; and taking an average value of the light reflected by the electronic paper area to be tested, which is collected in the initial sampling period after a plurality of adjustments, and taking the average value as the light reflected by the electronic paper area to be tested in the first driving state and the second driving state. On the other hand, determining a reflection characterization value according to the light reflected by the electronic paper area to be measured in the first driving state and the second driving state, the environmental reference light, and the driving parameters of the front light partiti