CN113945272A - Light sensing device, ambient light measuring method thereof and electronic equipment - Google Patents
Light sensing device, ambient light measuring method thereof and electronic equipment Download PDFInfo
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- CN113945272A CN113945272A CN202010696670.7A CN202010696670A CN113945272A CN 113945272 A CN113945272 A CN 113945272A CN 202010696670 A CN202010696670 A CN 202010696670A CN 113945272 A CN113945272 A CN 113945272A
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- 238000000034 method Methods 0.000 title claims description 14
- 238000005259 measurement Methods 0.000 claims abstract description 40
- 238000002834 transmittance Methods 0.000 claims abstract description 34
- 238000009792 diffusion process Methods 0.000 claims abstract description 20
- 238000004364 calculation method Methods 0.000 claims description 9
- 238000000691 measurement method Methods 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 4
- 238000012886 linear function Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
- G01J1/0448—Adjustable, e.g. focussing
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/163—Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
Abstract
The application discloses light sense device includes: an ambient light sensor; a diffusion layer disposed on the ambient light sensor; an electrochromic layer disposed on the ambient light sensor, the light transmittance of the electrochromic layer decreasing when the ambient light brightness reaches an ambient light sensor measurement threshold; the transmittance of the electrochromic layer is controlled, so that the light intensity transmitted to the ambient light sensor can be reduced, the brightness interval matched with the range of the ambient light sensor is reached, and the transmittance of the electrochromic sheet is controlled to be simpler and easier than the design of printing ink, so that the ambient light sensor is sensitive to the brightness recognition of a dark light environment, and the problem of inaccurate measurement cannot occur.
Description
Technical Field
The application relates to the technical field of optical sensors, in particular to a light sensor, an ambient light measuring method of the light sensor and electronic equipment.
Background
The ambient light sensor is a standard device on the terminal equipment, and is used for sensing brightness and color temperature information of the environment where the terminal equipment is located, adjusting the screen brightness and color temperature of the terminal equipment and achieving a good visual effect.
The ambient light sensor on the present terminal equipment is used in combination with the diffusion layer, and the light is adjusted through the printing ink on the screen cover plate so as to reach the light brightness interval matched with the ambient light sensor range.
However, the range of the ambient light sensor to the brightness is limited, the range easily reaches the peak value, at this time, the light entering amount needs to be adjusted through the ink, and if the ink design is not good, the ambient light sensor is not sensitive to the brightness recognition, and the measurement is not accurate.
Disclosure of Invention
In view of this, the present application provides a light sensing device, an ambient light measuring method thereof, and an electronic device, so as to solve the problems that the existing ambient light sensor has a limited range for light, the range easily reaches a peak value, at this time, the amount of light entering needs to be adjusted by ink, and if the ink design is not good, the ambient light sensor is not sensitive to brightness recognition, and the measurement is not accurate.
The present application in a first aspect provides a light sensing device comprising: an ambient light sensor; a diffusion layer disposed on the ambient light sensor; the light transmittance of the electrochromic layer is reduced when the ambient light brightness reaches the ambient light sensor measurement threshold.
Wherein the diffusion layer is located between the ambient light sensor and the electrochromic layer; alternatively, the electrochromic layer is located between the diffusion layer and the ambient light sensor.
Wherein the light sensing device further comprises: and the control circuit is electrically connected with the electrochromic layer and is used for controlling the light transmittance of the electrochromic layer.
Wherein the electrochromic layer returns to a transparent state when an ambient light brightness value is below the ambient light sensor measurement threshold.
A second aspect of the present invention provides an ambient light measuring method of the light-sensing device described in any one of the above, wherein the light-sensing device includes: an ambient light sensor; a diffusion layer disposed on the ambient light sensor; and an electrochromic layer disposed on the diffusion layer; the ambient light measuring method of the light sensing device comprises the following steps: detecting a brightness value of ambient light using an ambient light sensor; monitoring the brightness value; if the brightness value reaches the measurement threshold value, controlling the electrochromic layer to reduce the light transmittance so as to reduce the light intensity transmitted to the ambient light sensor; and switching a calculation mode of the brightness value, and calculating the brightness value output by the ambient light sensor by using the calculation mode to obtain a real brightness value exceeding the measurement threshold.
Wherein the method further comprises: and if the brightness value is lower than the measurement threshold value, controlling the electrochromic layer to be restored to the transparent state.
Wherein, the calculation mode of the brightness value comprises the following steps: when the brightness value does not reach the measurement threshold, the brightness value is calculated in the following mode: kx, where y is a luminance value of the ambient light when the ambient light sensor measures the ambient light luminance, x is an actual luminance of the ambient light, and k is a fixed value representing a linear relationship between the actual luminance of the ambient light sensed by the ambient light sensor and the luminance value; after the brightness value reaches the measurement threshold, the brightness value is calculated in the following manner: k 'x + b, wherein y is the luminance numerical value of ambient light that ambient light sensor measured ambient light, and x is the actual luminance of ambient light, and k' is the fixed value, represents the linear relation between the actual luminance of ambient light and the luminance numerical value that ambient light sensor sensed when electrochromic layer light transmissivity reduces, and b is the luminance numerical value of the weakest ambient light that ambient light sensor can sense when electrochromic layer light transmissivity reduces.
Wherein the threshold is less than or equal to a highest value of the ambient light sensor range.
The number of the threshold values is at least two, the light transmittance of each threshold value corresponding to the electrochromic layer is different, and the higher the value of the threshold value is, the lower the light transmittance of the electrochromic layer is.
A third aspect of the present application provides an electronic apparatus including the light-sensing device as described in any one of the above.
The application foretell light sense device and ambient light measuring method, electronic equipment, light transmissivity through control electrochromic layer, can reduce the light intensity of transmitting to the ambient light sensor, thereby behind the luminance of ambient light surpassed the range of ambient light sensor, the light sense device also can make the ambient light sensor measure the ambient light of higher luminance in its range, and the transmittance of control electrochromic layer is simpler and easier than the design of printing ink, consequently, make the ambient light sensor comparatively sensitive to the luminance discernment of dark light environment, and wider to the measuring interval of ambient light brightness, the inaccurate problem of measurement also can not appear.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is an exploded view of an embodiment of a light sensing device;
FIG. 2 is an exploded view of another embodiment of the light sensing device of the present application;
FIG. 3 is a schematic flow chart of an ambient light measurement method of a light sensing device according to an embodiment of the present application;
fig. 4 is a linear relationship diagram between the luminance value measured by the ambient light sensor and the actual luminance in the ambient light measuring method of the light sensing device according to the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application. The following embodiments and their technical features may be combined with each other without conflict.
Referring to fig. 1 and 2, the present application provides a light sensing device, including: an ambient light sensor 1, a diffusion layer 2, an electrochromic layer 3; the diffusion layer 2 is arranged on the ambient light sensor 1; an electrochromic layer 3 is provided on the ambient light sensor 1, the light transmittance of which decreases when the ambient light brightness reaches the ambient light sensor measurement threshold.
In other embodiments, the electrochromic layer 3 returns to the transparent state when the ambient light brightness value is lower than the measurement threshold of the ambient light sensor 1, without affecting the light intensity sensed by the ambient light sensor.
The ambient light sensor measurement threshold may be its measurement peak. When the ambient light sensor 1 reaches or is about to reach the measurement threshold, the light transmittance of the electrochromic layer 3 is controlled to be reduced, the light intensity transmitted to the ambient light sensor 1 can be reduced, and the light brightness interval matched with the range of the ambient light sensor 1 is reached.
As shown in fig. 1, in the present embodiment, the diffusion layer 2 is located between the ambient light sensor 1 and the electrochromic layer 3.
When the ambient light sensor 1 reaches or is about to reach the measurement range, the ambient light firstly passes through the electrochromic layer 3 before being sensed by the ambient light sensor 1, is weakened by the electrochromic layer 3 and then passes through the diffusion layer 2 to reach the ambient light sensor 1, so that the ambient light sensor 1 senses and measures the ambient light.
In addition, the light-sensing device further includes: and the control circuit is electrically connected with the electrochromic layer and is used for controlling the light transmittance of the electrochromic layer.
In this embodiment, the control circuit may be a voltage output circuit for outputting a voltage to control the light transmittance of the electrochromic layer 3 to decrease with an increase in the output voltage and to control the electrochromic layer 3 to return to the transparent state when the ambient light luminance value is lower than the measurement threshold of the ambient light sensor 1.
In other embodiments, the control circuit may also be a current output circuit for outputting a current to control the light transmittance of the electrochromic layer 3 to decrease in lock with an increase in the output current, and to control the electrochromic layer 3 to return to the transparent state when the ambient light brightness value is lower than the ambient light sensor 1 measurement threshold.
In other embodiments, the control circuit may also be a temperature output circuit for increasing the temperature of the electrochromic layer 3, so that the electrochromic layer 3 decreases the light transmittance with increasing temperature, and controlling the electrochromic layer 3 to return to the transparent state when the ambient light brightness value is lower than the ambient light sensor 1 measurement threshold.
In other embodiments, the electrochromic layer 3 is located between the diffusion layer 2 and the ambient light sensor 1, as shown in figure 2.
When the ambient light sensor 1 reaches or is about to reach the measuring range, the ambient light firstly passes through the diffusion layer 2 and then passes through the electrochromic layer 3 before being sensed by the ambient light sensor 1, and then is attenuated by the electrochromic layer 3 and then reaches the ambient light sensor 1, so that the ambient light sensor 1 senses and measures the ambient light.
Referring to fig. 3, an embodiment of the present application further provides an ambient light measurement method of a light sensor, where the light sensor includes: an ambient light sensor; a diffusion layer disposed on the ambient light sensor; an electrochromic layer disposed on the diffusion layer; the ambient light measurement method of the light sensing device comprises the following steps: s1, detecting the brightness value of the ambient light by using an ambient light sensor; s2, monitoring the brightness value; s3, if the brightness value reaches the measurement threshold value, controlling the electrochromic layer to reduce the light transmittance so as to reduce the light intensity transmitted to the ambient light sensor; and S4, switching the calculation mode of the brightness value, and calculating the brightness value output by the ambient light sensor by using the calculation mode to obtain the real brightness value exceeding the measurement threshold value.
In this embodiment, after the brightness value measured by the ambient light sensor reaches the preset threshold, the light transmittance of the electrochromic layer is reduced, so as to weaken the light intensity sensed by the ambient light sensor. In other embodiments, before the brightness value measured by the ambient light sensor does not reach the preset threshold, the electrochromic layer is controlled to be in a transparent state, and the light intensity sensed by the ambient light sensor is not affected.
When the brightness value measured by the ambient light sensor does not reach the threshold value and reaches the preset threshold value, different calculation methods are respectively adopted:
when the brightness value does not reach the measurement threshold value, the brightness value is calculated in the following mode: y ═ kx, where y is the luminance value of the ambient light when the ambient light sensor measures the ambient light luminance, x is the actual luminance of the ambient light, and k is a fixed value representing the linear relationship between the actual luminance of the ambient light sensed by the ambient light sensor and the luminance value, as shown in fig. 4, since y ═ kx is a linear function, the relationship between the luminance value and the actual luminance of the ambient light can be represented in a two-dimensional coordinate system, and the value of the slope k depends on the light transmittance exhibited by the electrochromic layer, and the values of the slope k are different for electrochromic layers with different light transmittances;
after the brightness value reaches the measurement threshold, the brightness value is calculated in the following manner: as shown in fig. 4, since y ═ k ' x + b is a linear function, the relationship between the luminance value and the actual luminance of the ambient light can be represented in a two-dimensional coordinate system, and the value of the slope k ' and the value of b depend on the light transmittance exhibited by the electrochromic layer, and the values of the slope k ' and the intercept b are different for the electrochromic layers with different light transmittances.
In this embodiment, the measurement threshold may be less than or equal to the highest value of the range of the ambient light sensor and greater than the lowest value of the range of the ambient light.
In this embodiment, there may be at least two measurement thresholds, each threshold corresponding to a different light transmittance of the electrochromic layer, and the higher the value of the threshold, the lower the light transmittance of the electrochromic layer.
Through setting up different threshold values, can correspond the different light transmittances of electrochromic layer to make ambient light sensor can measure the ambient light of wider bright interval.
In this embodiment, controlling the electrochromic layer to reduce the light transmittance using the control circuit may include: and outputting voltage to the electrochromic layer by using a control circuit, so that the electrochromic layer reduces the light transmittance after the voltage is applied.
In other embodiments, controlling the electrochromic layer to reduce the light transmittance using the control circuit may further include: outputting current to the electrochromic layer by using a control circuit, so that the light transmittance of the electrochromic layer is reduced after the current is applied to the electrochromic layer;
in other embodiments, controlling the electrochromic layer to reduce the light transmittance using the control circuit may further include: the control circuit is used to raise the temperature of the electrochromic layer so that the electrochromic layer reduces the light transmission rate after the temperature is raised.
The ambient light measuring method of the light sensor provided by the embodiment of the application has the following working principle: light transmissivity through control electrochromic layer, can reduce the light intensity that transmits to environment light sensor, thereby after the luminance of environment light surpassed environment light sensor's range, the light sense device also can make environment light sensor measure the environment light of higher luminance in its range, and the transmissivity of control electrochromic layer is more simple and easy than the design of printing ink, consequently make environment light sensor comparatively sensitive to the luminance discernment of dim light environment, and wider to environment light brightness's measurement interval, the inaccurate problem of measurement also can not appear.
The embodiment of the application also provides electronic equipment which comprises the light sensing device and is used for realizing the sensitivity adjustment method of the light sensing device. The electronic device may be a mobile terminal.
Although the application has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. This application is intended to embrace all such modifications and variations and is limited only by the scope of the appended claims. In particular regard to the various functions performed by the above described components, the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the specification.
That is, the above description is only an embodiment of the present application, and not intended to limit the scope of the present application, and all equivalent structures or equivalent flow transformations made by using the contents of the specification and the drawings, such as mutual combination of technical features between various embodiments, or direct or indirect application to other related technical fields, are included in the scope of the present application.
In addition, in the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be considered as limiting the present application. In addition, structural elements having the same or similar characteristics may be identified by the same or different reference numerals. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The previous description is provided to enable any person skilled in the art to make and use the present application. In the foregoing description, various details have been set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not shown in detail to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Claims (10)
1. A light sensing device, comprising:
an ambient light sensor;
a diffusion layer disposed on the ambient light sensor;
the light transmittance of the electrochromic layer is reduced when the ambient light brightness reaches the ambient light sensor measurement threshold.
2. A light sensing device as defined in claim 1,
the diffusion layer is positioned between the ambient light sensor and the electrochromic layer;
alternatively, the electrochromic layer is located between the diffusion layer and the ambient light sensor.
3. A light sensing device as defined in claim 1,
the light sensing device further includes:
and the control circuit is electrically connected with the electrochromic layer and is used for controlling the light transmittance of the electrochromic layer.
4. A light sensing device as defined in claim 1,
the electrochromic layer returns to a transparent state when an ambient light brightness value is below the ambient light sensor measurement threshold.
5. An ambient light measurement method of a light-sensing device, the light-sensing device comprising: an ambient light sensor; a diffusion layer disposed on the ambient light sensor; and an electrochromic layer disposed on the diffusion layer; the ambient light measuring method of the light sensing device comprises the following steps:
detecting a brightness value of ambient light using an ambient light sensor;
monitoring the brightness value;
if the brightness value reaches the measurement threshold value, controlling the electrochromic layer to reduce the light transmittance so as to reduce the light intensity transmitted to the ambient light sensor;
and switching a calculation mode of the brightness value, and calculating the brightness value output by the ambient light sensor by using the calculation mode to obtain a real brightness value exceeding the measurement threshold.
6. The ambient light measurement method of an optical sensor device according to claim 5, wherein:
the method further comprises the following steps: and if the brightness value is lower than the measurement threshold value, controlling the electrochromic layer to be restored to the transparent state.
7. The ambient light measurement method of an optical sensor device according to claim 5, wherein:
the calculation method of the light quantity value comprises the following steps:
when the brightness value does not reach the measurement threshold, the brightness value is calculated in the following mode: kx, where y is a luminance value of the ambient light when the ambient light sensor measures the ambient light luminance, x is an actual luminance of the ambient light, and k is a fixed value representing a linear relationship between the actual luminance of the ambient light sensed by the ambient light sensor and the luminance value;
after the brightness value reaches the measurement threshold, the brightness value is calculated in the following manner: k 'x + b, wherein y is the luminance numerical value of ambient light that ambient light sensor measured ambient light, and x is the actual luminance of ambient light, and k' is the fixed value, represents the linear relation between the actual luminance of ambient light and the luminance numerical value that ambient light sensor sensed when electrochromic layer light transmissivity reduces, and b is the luminance numerical value of the weakest ambient light that ambient light sensor can sense when electrochromic layer light transmissivity reduces.
8. The ambient light measurement method of an optical sensor device according to claim 5, wherein:
the measurement threshold is less than or equal to a highest value of the ambient light sensor range.
9. The ambient light measurement method of an optical sensor device according to claim 5, wherein:
the number of the measurement thresholds is at least two, the light transmittance of each measurement threshold corresponding to the electrochromic layer is different, and the higher the value of the measurement threshold is, the lower the light transmittance of the electrochromic layer is.
10. An electronic apparatus, comprising the light-sensing device as claimed in any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010696670.7A CN113945272A (en) | 2020-07-17 | 2020-07-17 | Light sensing device, ambient light measuring method thereof and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010696670.7A CN113945272A (en) | 2020-07-17 | 2020-07-17 | Light sensing device, ambient light measuring method thereof and electronic equipment |
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| CN113945272A true CN113945272A (en) | 2022-01-18 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180120661A1 (en) * | 2016-10-31 | 2018-05-03 | Google Inc. | Electrochromic Filtering in a Camera |
| US20200074959A1 (en) * | 2018-08-31 | 2020-03-05 | Apple Inc. | Color Ambient Light Sensor With Adjustable Neutral Density Filter |
-
2020
- 2020-07-17 CN CN202010696670.7A patent/CN113945272A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180120661A1 (en) * | 2016-10-31 | 2018-05-03 | Google Inc. | Electrochromic Filtering in a Camera |
| US20200074959A1 (en) * | 2018-08-31 | 2020-03-05 | Apple Inc. | Color Ambient Light Sensor With Adjustable Neutral Density Filter |
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