WO2017071527A1

WO2017071527A1 - Terminal screen and brightness control system and brightness control method

Info

Publication number: WO2017071527A1
Application number: PCT/CN2016/102769
Authority: WO
Inventors: 王瑞珉; 秦牧云; 周孟特; 余鑫
Original assignee: 华为技术有限公司
Priority date: 2015-10-30
Filing date: 2016-10-20
Publication date: 2017-05-04
Also published as: CN106652971A; CN106652971B

Abstract

Provided are a terminal screen and a brightness control system and a brightness control method, which can improve the accuracy in detecting the ambient light intensity, and thus improve the accuracy in controlling the brightness of a terminal screen. The terminal screen sequentially comprises a protective layer (101), a photovoltaic cell layer (102) and a display layer (103) from top to bottom, wherein the protective layer (101) is used for protecting the photovoltaic cell layer (102) and the display layer (103); the photovoltaic cell layer (102) is used for converting optical energy into electrical energy for outputting; and the display layer (103) is used for displaying terminal data information.

Description

Terminal screen and brightness control system, brightness control method

This application claims priority to Chinese Patent Application No. 201510737347.9, entitled "A Terminal Screen and Brightness Control System, Brightness Control Method" on October 30, 2015, the entire contents of which are incorporated by reference. In this application.

Technical field

The embodiments of the present invention relate to the field of terminal technologies, and in particular, to a terminal screen, a brightness control system, and a brightness control method.

Background technique

In various terminals having a screen, such as a wearable device, a mobile phone, and a tablet, the terminal screen is a large power consumption component. In order to reduce the power consumption of the terminal screen, it is usually necessary to control the brightness of the terminal screen in real time according to the ambient light intensity. At present, a mainstream terminal screen mainly includes a protection layer and a display layer from top to bottom, wherein: a protection layer for protecting the display layer and a display layer for displaying terminal data information. Controlling the brightness of the terminal screen is essentially controlling the brightness of the display layer of the terminal screen.

In order to realize real-time control of the brightness of the terminal screen according to the ambient light intensity, one solution in the prior art is to place an ambient light sensor behind the terminal screen to detect the ambient light intensity, and control the brightness of the terminal screen according to the detection result of the ambient light sensor. .

However, in the prior art solution, the ambient light needs to pass through the protective layer and the display layer of the terminal screen to illuminate the ambient light sensor, and there is a large transmission path loss, and the display layer illumination above the environmental sensor also affects. Ambient light sensor, which causes the ambient light intensity detected by the ambient light sensor to deviate greatly from the actual ambient light intensity; and, during the use of the terminal, when the ambient light to ambient light sensor transmission path happens to be by a finger or other object When it is cut off, it will also cause the ambient light intensity detected by the ambient light sensor to deviate greatly from the actual ambient light intensity. Obviously, the solution in the prior art cannot guarantee the detection precision of the ambient light intensity, and thus the control precision of the brightness of the terminal screen cannot be guaranteed.

Summary of the invention

The embodiment of the invention provides a terminal screen, a brightness control system and a brightness control method, which can improve the detection precision of the ambient light intensity, thereby improving the control precision of the brightness of the terminal screen.

In a first aspect, a terminal screen is provided, which includes a protective layer, a photovoltaic cell layer and a display layer in order from top to bottom, wherein:

The protective layer is configured to protect the photovoltaic cell layer and the display layer;

The photovoltaic cell layer is configured to convert light energy into electrical energy output;

The display layer is configured to display terminal data information.

With reference to the first aspect, in a first possible implementation, the method further includes a touch layer, the touch layer being located between the protective layer and the photovoltaic cell layer, or located in the photovoltaic cell layer and the Between layers.

In conjunction with the first aspect, or the first possible implementation of the first aspect, in a second possible implementation, the protective layer is specifically a glass protective layer.

With reference to the first aspect, the first possible implementation of the first aspect, or the second possible implementation of the first aspect, in a third possible implementation, the photovoltaic cell layer is specifically an organic compound photovoltaic Battery layer.

In a second aspect, a brightness control system for a terminal screen is provided. The terminal screen includes a protection layer, a photovoltaic cell layer and a display layer in order from top to bottom, wherein: the protection layer is used to protect the photovoltaic cell layer and The display layer; the photovoltaic cell layer for converting light energy into electrical energy output; the display layer for displaying terminal data information; the brightness control system comprising:

a determining module, configured to determine an output power of the photovoltaic cell layer of the terminal screen; determining an ambient light intensity according to the determined output power;

And a control module, configured to control brightness of the screen of the terminal according to the determined ambient light intensity.

In conjunction with the second aspect, in a first possible implementation, the determining module is specifically configured to determine an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy.

In conjunction with the first possible implementation of the second aspect, in a second possible implementation manner, the method further includes:

a charging module, configured to charge the terminal battery based on the electrical energy output by the photovoltaic cell layer;

a sampling module, configured to sample a charging current when the terminal battery is charged;

The determining module is specifically configured to determine, according to the charging current, an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy.

With reference to the second possible implementation of the second aspect, in a third possible implementation, the determining module is specifically configured to determine, when the ambient light is natural light, the visible light in the photovoltaic cell layer The output power generated by converting to electrical energy is: (1-η%) of the total output power of the photovoltaic cell layer; when the ambient light is illumination light, determining that the photovoltaic cell layer converts visible light in ambient light into electrical energy The output power produced is: the total output power of the photovoltaic cell layer;

Wherein, the total output power of the photovoltaic cell layer is determined according to the charging current and the voltage of the terminal battery; n% is that when the ambient light is natural light, the photovoltaic cell layer converts invisible light in ambient light into electrical energy. The resulting output power is a percentage of the total output power of the photovoltaic cell layer.

In conjunction with the third possible implementation of the second aspect, in a fourth possible implementation, the invisible light comprises infrared light.

With reference to the third possible implementation of the second aspect, or the fourth possible implementation of the second aspect, in a fifth possible implementation, the sampling module is specifically configured to output and characterize the charging Characterizing the voltage of the current;

The determining module is further configured to: when the characterization voltage is greater than a preset value, determine that the ambient light is natural light; and when the characterization voltage is not greater than a preset value, determine that the ambient light is illumination light.

In a third aspect, a method for controlling brightness of a terminal screen is provided. The terminal screen includes a protective layer, a photovoltaic cell layer and a display layer in order from top to bottom, wherein: the protective layer is used to protect the photovoltaic cell layer and The display layer; the photovoltaic cell layer is configured to convert light energy into electrical energy output; the display layer is configured to display terminal data information; and the brightness control method comprises:

Determining an output power of the photovoltaic cell layer of the terminal screen;

Determining ambient light intensity based on the determined output power;

The brightness of the terminal screen is controlled according to the determined ambient light intensity.

With reference to the third aspect, in a first possible implementation manner, determining an output power of a photovoltaic cell layer of the terminal screen, specifically:

Determining an output power produced by the photovoltaic cell layer converting visible light in ambient light into electrical energy.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner, determining, by the photovoltaic cell layer, the output power generated by converting visible light in ambient light into electrical energy, specifically includes:

Charging the terminal battery based on the electrical energy output by the photovoltaic cell layer;

Sampling the charging current when the terminal battery is charged;

And determining, according to the charging current, an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner, determining, according to the charging current when the terminal battery is charged, determining that the photovoltaic cell layer converts visible light in ambient light into electrical energy The resulting output power, including:

When the ambient light is natural light, determining that the photovoltaic cell layer converts visible light in ambient light into electrical energy produces an output power of (1-η%) of the total output power of the photovoltaic cell layer;

When the ambient light is illumination light, determining that the photovoltaic cell layer converts visible light in ambient light into electrical energy produces an output power of: a total output power of the photovoltaic cell layer;

In conjunction with the third possible implementation of the third aspect, in a fourth possible implementation, the invisible light comprises infrared light.

With reference to the third possible implementation manner of the third aspect, or the fourth possible implementation manner of the third aspect, in the fifth possible implementation manner, when sampling the charging current of the terminal battery during charging, Specifically, a characterization voltage characterizing the magnitude of the charging current is obtained;

Specifically, the following method is used to determine whether the ambient light is natural light:

When the characterization voltage is greater than a preset value, determining that the ambient light is natural light; and when the characterization voltage is not greater than a preset value, determining that the ambient light is illumination light.

A fourth aspect provides a brightness control system for a terminal screen, wherein the terminal screen includes a protection layer, a photovoltaic cell layer and a display layer in order from top to bottom, wherein: the protection layer is used to protect the photovoltaic cell layer and The display layer; the photovoltaic cell layer for converting light energy into electrical energy output; the display layer for displaying terminal data information; the brightness control system comprising:

a processor for determining an output power of a photovoltaic cell layer of the terminal screen; determining an ambient light intensity according to the determined output power; and controlling a brightness of the terminal screen according to the determined ambient light intensity.

In conjunction with the first possible implementation of the fourth aspect, in a second possible implementation, the processor is specifically configured to determine an output generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy power.

In conjunction with the second possible implementation of the fourth aspect, in a third possible implementation manner, the method further includes:

a charger for charging the terminal battery based on the electrical energy output by the photovoltaic cell layer;

The processor is further configured to sample a charging current when the terminal battery is charged;

The processor is specifically configured to determine, according to the charging current, an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy.

In conjunction with the third possible implementation of the fourth aspect, in a fourth possible implementation, the processor is configured to determine, when the ambient light is natural light, the visible light in the photovoltaic layer The output power produced by the conversion to electrical energy is: the total output power of the photovoltaic cell layer (1-η%); when the ambient light is illumination light, determining that the photovoltaic cell layer converts visible light in ambient light into electrical energy by an output power: total output power of the photovoltaic cell layer; The total output power of the photovoltaic cell layer is determined according to the charging current and the voltage of the terminal battery; η% is generated when the photovoltaic cell layer converts invisible light in ambient light into electrical energy when the ambient light is natural light. The proportion of output power in the total output power of the photovoltaic cell layer.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation, the processor is specifically configured to output a characterization voltage that is indicative of a magnitude of the charging current;

The processor is further configured to: determine that the ambient light is natural light when the characteristic voltage is greater than a preset value; and determine that the ambient light is illumination light when the characteristic voltage is not greater than a preset value.

The terminal screen provided by the first aspect, the brightness control system of the terminal screen provided by the second aspect, the brightness control method of the terminal screen provided by the third aspect, or the brightness control system of the terminal screen provided by the fourth aspect, the terminal screen includes protection a layer, a photovoltaic cell layer and a display layer, wherein the photovoltaic cell layer is used to convert light energy into electrical energy output, and the stronger the ambient light intensity, the greater the output power of the photovoltaic cell layer, so the environment can be determined according to the output power of the photovoltaic cell layer. Light intensity controls the brightness of the terminal screen. Compared with the prior art, the transmission path loss of the photovoltaic cell layer irradiated by the ambient light to the terminal screen is small, and the display layer is located under the photovoltaic cell layer, and the display layer illumination does not affect the photovoltaic cell layer; and, the photovoltaic cell layer area It is relatively large and is not easily blocked by fingers or other objects; therefore, compared with the prior art, the ambient light intensity determined according to the output power of the photovoltaic cell layer is relatively accurate, and the control precision of the terminal screen brightness is also high.

DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be a In the drawing:

FIG. 1 is a schematic structural diagram of a terminal screen according to an embodiment of the present disclosure;

2 is a second schematic structural diagram of a terminal screen according to an embodiment of the present invention;

FIG. 3 is a third schematic structural diagram of a terminal screen according to an embodiment of the present disclosure;

4 is a schematic structural diagram of a brightness control system of a terminal screen according to an embodiment of the present invention;

FIG. 5 is a second schematic structural diagram of a brightness control system of a terminal screen according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a sampling module in a brightness control system of a terminal screen according to an embodiment of the present disclosure;

FIG. 7 is a schematic flowchart of control of a brightness control system of a terminal screen according to an embodiment of the present disclosure;

FIG. 8 is a third schematic structural diagram of a brightness control system of a terminal screen according to an embodiment of the present disclosure;

FIG. 9 is a schematic flowchart diagram of a method for controlling brightness of a terminal screen according to an embodiment of the present invention.

detailed description

The present invention provides a terminal screen, a brightness control system, and a brightness control method, in order to provide an implementation scheme for improving the detection accuracy of the ambient light intensity, and thereby improving the brightness of the terminal screen brightness. The preferred embodiments are described by way of example only, and are not intended to be limiting And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

The embodiment of the invention provides a terminal screen. As shown in FIG. 1 , the protection layer 101, the photovoltaic cell layer 102 and the display layer 103 may be sequentially arranged from top to bottom, wherein:

a protective layer 101 for protecting the photovoltaic cell layer 102 and the display layer 103;

a photovoltaic cell layer 102 for converting light energy into electrical energy output;

The display layer 103 is configured to display terminal data information.

That is, the terminal screen provided by the embodiment of the present invention may include a three-layer structure:

The first layer is the protective layer 101, which can protect other layers of the terminal screen;

The second layer is the photovoltaic cell layer 102. The stronger the intensity of the ambient light, the greater the output power of the photovoltaic cell layer 102; that is, the photovoltaic cell layer 102 has the characteristics that the output power is positively correlated with the ambient light intensity, so this feature can be utilized. The ambient light intensity is determined according to the output power of the photovoltaic cell layer 102, and the brightness of the terminal screen is controlled;

The third layer is the display layer 103, and the brightness of the screen of the control terminal is substantially the brightness of the control display layer 103. degree.

Since the display layer 103 is located at the lowermost layer of the terminal screen, the transmittance of the protective layer 101 and the photovoltaic cell layer 102 should both be greater than 0, so that the user can view the terminal data information displayed on the display layer 103. The specific light transmittance of the protective layer 101 and the photovoltaic cell layer 102 is not limited in the embodiment of the present invention.

In a specific embodiment of the present invention, the protective layer 101 may be a glass protective layer and has a low cost.

In another embodiment of the present invention, the protective layer 101 may also be a sapphire protective layer with high abrasion resistance.

In other embodiments of the present invention, the protective layer 101 may also be a protective layer of other materials, which is not specifically limited in the embodiment of the present invention.

In a specific embodiment of the invention, the photovoltaic cell layer 102 can be an organic compound photovoltaic cell layer that is susceptible to a transparent effect.

In other embodiments of the present invention, the photovoltaic cell layer 102 may also be other types of photovoltaic cell layers, which are not specifically limited in the embodiment of the present invention.

The current terminal device is a touch screen terminal. Therefore, the terminal screen provided by the embodiment of the present invention may further include a touch layer 104, and convert the operation of the user on the screen of the terminal, such as clicking, sliding, etc., into a terminal control signal to implement the terminal. Touch function. That is, the terminal screen provided by the embodiment of the present invention may include a four-layer structure.

In a specific embodiment of the present invention, the touch layer 104 can be located between the protective layer 101 and the photovoltaic cell layer 102 as shown in FIG. 2; that is, the first layer of the terminal screen is the protective layer 101, The second layer is the touch layer 104, the third layer is the photovoltaic cell layer 102, and the fourth layer is the display layer 103.

With the structure of the terminal screen shown in FIG. 2, the touch sensitivity of the terminal is higher.

In another embodiment of the present invention, the touch layer 104 can also be located between the photovoltaic cell layer 102 and the display layer 103 as shown in FIG. 3; that is, the first layer of the terminal screen is the protective layer 101. The second layer is the photovoltaic cell layer 102, the third layer is the touch layer 104, and the fourth layer is the display layer 103.

Compared with the structure of the terminal screen shown in FIG. 2, the structure of the terminal screen shown in FIG. 3 is adopted, and the ring is used. The transmission path of the photovoltaic cell layer that illuminates the terminal screen is shorter, and thus is more advantageous for the brightness control of the terminal screen.

That is, the terminal screen structure shown in FIG. 1 can be applied to various non-touch screen terminals, and the terminal screen structure shown in FIG. 2 or FIG. 3 can be applied to various touch screen terminals. The terminal may be, but not limited to, a wearable device, a mobile phone, a tablet, or the like.

In actual implementation, the structural form of the adopted terminal screen may be specifically determined according to the requirements of the actual application scenario.

Obviously, compared with the prior art, with the terminal screen provided by the embodiment of the present invention, the transmission path loss of the photovoltaic cell layer irradiated by the ambient light to the terminal screen is small, and the display layer is located below the photovoltaic cell layer, and the display layer does not emit light. It will affect the photovoltaic cell layer; and, the photovoltaic cell layer has a large area and is not easily blocked by fingers or other objects. Therefore, compared with the prior art, the ambient light intensity determined according to the output power of the photovoltaic cell layer is relatively accurate, and the control precision of the terminal screen brightness is also high.

The embodiment of the present invention further provides a brightness control system for the terminal screen, as shown in FIG. 4, which may include:

a determining module 401, configured to determine an output power of a photovoltaic cell layer of the terminal screen; determining an ambient light intensity according to the determined output power;

The control module 402 is configured to control the brightness of the screen of the terminal according to the ambient light intensity determined by the determining module 401.

In the prior art, each photovoltaic cell has a relationship between output power and ambient light intensity, that is, a corresponding relationship between output power and ambient light intensity. Therefore, after determining the output power of the photovoltaic cell layer, the determining module 401 can determine the ambient light intensity according to the correspondence.

In a specific embodiment of the present invention, the determining module 401 may be specifically configured to determine a total output power of the photovoltaic cell layer of the terminal screen; and determine the ambient light intensity according to the determined total output power.

In general, ambient light is either illumination or natural light.

The light of the illumination light is basically visible to the human eye, that is, when the ambient light is illumination light, the photovoltaic cell layer The total output power is all the output power produced by converting visible light into electrical energy.

The light of natural light is partially visible to the human eye, and the other part is invisible to the human eye. When the ambient light is natural light, the total output power of the photovoltaic cell layer consists of two parts, one of which is the output generated by converting visible light into electrical energy. Power, another part is the output power produced by converting invisible light into electrical energy.

Therefore, in order to make the brightness control scheme more reasonable, in another embodiment of the present invention, the determining module 401 may be specifically configured to determine an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy, and utilizing The output power corresponding to visible light determines the ambient light intensity. At this time, the determined ambient light intensity is substantially visible light intensity, thereby controlling the brightness of the terminal screen, thereby avoiding the brightness of the terminal screen in the natural light environment, so that the user gets a better experience. .

It should be noted that the visible in the embodiment of the present invention is all visible to the human eye, and the invisibility appearing in the embodiment of the present invention means that the human eye is invisible.

Further, the control module 402 is specifically configured to control the brightness of the display layer of the terminal screen according to the ambient light intensity determined by the determining module 401; the stronger the ambient light intensity determined by the determining module 401, the higher the brightness of the control module 402 controls the terminal screen. That is, the brightness of the display layer of the control terminal screen is higher; the weaker the ambient light intensity determined by the determination module 401 is, the lower the brightness of the control screen is controlled by the control module 402, that is, the lower the brightness of the display layer of the control terminal screen.

In actual implementation, the foregoing determining module 401 and the control module 402 may be implemented by using two processor chips, or may be implemented by using one processor chip.

In the brightness control system provided by the embodiment of the present invention, the total output power of the photovoltaic cell layer of the terminal screen may be determined in various manners, or the output power generated by the photovoltaic cell layer converting visible light in the ambient light into electrical energy may be determined.

The specific implementation of the brightness control system of the terminal screen provided by the embodiment of the present invention is illustrated by taking an example of determining the output power generated by the photovoltaic cell layer to convert visible light in the ambient light into electrical energy.

As shown in FIG. 5, the brightness control system of the terminal screen provided by the embodiment of the present invention may specifically include:

The charging module 501 is configured to charge the terminal battery based on the electrical energy output by the photovoltaic cell layer;

a sampling module 502, configured to sample a charging current when the terminal battery is charged;

a determining module 503, configured to determine, according to the charging current, an output power generated by the photovoltaic cell layer converting visible light in the ambient light into electrical energy; determining the ambient light intensity according to the determined output power;

The control module 504 is configured to control the brightness of the screen of the terminal according to the ambient light intensity determined by the determining module 401.

The charging module 501 is substantially a power management system, and converts the electrical energy output by the photovoltaic cell layer into a charging current for charging the terminal battery.

The sampling module 502 can specifically sample the charging current through the sampling resistor R, and output a characteristic voltage V characterizing the magnitude of the charging current. The sampling module 502 can be implemented by using the circuit shown in FIG. 6 or by using other current sampling circuits in the prior art.

The determining module 503 can determine the magnitude of the charging current according to the magnitude of the characterization voltage output by the sampling module 502. When the sampling module 502 adopts the circuit shown in FIG. 6 as a specific implementation circuit, the charging current I can be determined based on the following formula:

I=(V/n)/R;

Where n is the magnification of the amplifier in Figure 6.

Further, when the ambient light is natural light, the determining module 503 determines that the output power P ₁ generated by the photovoltaic cell layer converting visible light in the ambient light into electrical energy is: (1-η%) of the total output power of the photovoltaic cell layer; Wherein, the total output power of the photovoltaic cell layer is determined according to the charging current I and the voltage V _{bat of the} terminal battery; η% is the output power generated by the photovoltaic cell layer converting the invisible light in the ambient light into electrical energy when the ambient light is natural light. The proportion of the total output power of the photovoltaic cell layer; that is, at this time:

_{_{P 1 = I × V bat ×}} (1-η%);

When the ambient light is illumination light, the determining module 503 determines that the output power P ₂ generated by the photovoltaic cell layer converting visible light in the ambient light into electrical energy is: the total output power of the photovoltaic cell layer; that is, at this time:

P ₂ = I × V _bat .

When the ambient light is natural light, the invisible light mainly includes infrared light and ultraviolet light, and the proportion of ultraviolet light is small, so it can be ignored. That is, at this time, the above η% may specifically be a ratio of the output power generated by the photovoltaic cell layer converting infrared light in the ambient light into electrical energy when the ambient light is natural light, in the total output power of the photovoltaic cell layer.

Further, the determining module 503 is further configured to determine whether the ambient light is natural light or illumination light according to the characteristic voltage output by the sampling module 502. Specifically, when the characteristic voltage output by the sampling module 502 is greater than a preset value, determining that the ambient light is natural light When the characterization voltage output by the sampling module 502 is not greater than a preset value, it is determined that the ambient light is illumination light, that is, the ambient light is a light at this time.

The following describes the principle of determining the above preset value and how to determine it.

The difference between illumination and natural light illumination (unit lux) is relatively large. For example, a 40w illumination bulb has an illumination of 50lux, a home illumination has an illumination of 200lux, an office illumination has an illumination of 500lux, a supermarket illumination has an illumination of 1000lux, and a rainy natural light illumination of 10,000lux, a cloudy day. The natural light has an illuminance of 20,000 lux, the natural light of a cloudy day has an illuminance of 50,000 lux, and the natural light of a sunny day has an illuminance of 100,000 lux.

It can be seen from the illuminance data of the illumination lamp and the natural light in the above various cases that the illumination of the illumination light is generally less than 1000 lux, and the illumination of the natural light is generally 10,000 lux or more. Therefore, it is possible to first set the illuminance boundary line between the illumination light and the natural light, that is, between the maximum illumination of the common illumination light and the minimum illumination of the natural light (according to the above illumination data, that is, the values at 1000 lux and 10000 lux) as the illumination score. The boundary line is then used as the basis for determining the preset value by using the voltage corresponding to the illuminance boundary line. For example, the voltage corresponding to the illuminance dividing line can be used as a preset value.

The voltage corresponding to the above illuminance dividing line can be specifically determined by using the illuminance-voltage curve of the photovoltaic material used in the photovoltaic cell layer. The illuminance-voltage curve may be linear or non-linear, but each has a characteristic that the corresponding voltage also increases as the illuminance increases, and the corresponding voltage also decreases when the illuminance decreases, wherein each A photovoltaic material corresponds to an illuminance-voltage curve, corresponding to different photovoltaic materials The illuminance-voltage curves are generally different.

For example: suppose 5000 lux is used as the boundary line between illumination light and natural light, and photovoltaic material A used in photovoltaic cell layer. If the illuminance-voltage curve of photovoltaic material A is on the curve, the voltage corresponding to 5000 lux is 0.8V, and 0.8V is preset. The value is determined when the characterization voltage output by the sampling module 502 is less than 0.8V, and the ambient light is determined to be illumination light; when the characterization voltage output by the sampling module 502 is greater than 0.8V, the ambient light is determined to be natural light.

In the embodiment of the present invention, the determining module 503 and the control module 504 may be implemented by using an MCU (Micro Controller Unit), and the analog voltage output by the sampling module 502 is sampled by the analog-to-digital converter in the MCU. The specific control process can be as shown in FIG. 7, and specifically includes the following steps:

Step 701: Determine whether the characteristic voltage V is greater than a preset value.

When the characterization voltage V is greater than the preset value, the ambient light is natural light, and the process proceeds to step 702;

When the characterization voltage V is not greater than the preset value, the ambient light is illumination light at this time, and the process proceeds to step 703.

Step 702, based on the formula _{_{P 1 = I × V bat ×}} (1-η%) determining a photovoltaic cell layer converts the visible ambient light energy to the generated power output, proceeds to step 704.

Step 703: Determine, according to the formula P ₂ =I×V _bat , the output power generated by the photovoltaic cell layer converting visible light in the ambient light into electrical energy, and proceed to step 704.

Step 704: Determine, according to a correspondence between the output power and the ambient light intensity, an ambient light intensity corresponding to the determined output power.

Step 705: Control the brightness of the display layer of the terminal screen according to the determined ambient light intensity.

In addition, the embodiment of the present invention further provides a brightness control system for the terminal screen, as shown in FIG. 8, which may include:

The processor 81 is configured to determine an output power of the photovoltaic cell layer of the terminal screen; determine an ambient light intensity according to the determined output power; and control a brightness of the terminal screen according to the determined ambient light intensity.

Further, the processor is specifically configured to determine an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy.

Further, the method further includes: a charger 82, wherein the processor 81 and the charger 82 are connected through a communication bus 83;

a charger 82, configured to charge the terminal battery based on the electrical energy output by the photovoltaic cell layer;

The processor 81 is further configured to sample a charging current when the terminal battery is charged;

The processor 81 is specifically configured to determine, according to the charging current, an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy.

Further, the processor is specifically configured to determine, when the ambient light is natural light, an output power generated by converting the visible light in the ambient light into electrical energy by the photovoltaic cell layer: a total output power of the photovoltaic cell layer (1-η%); when the ambient light is illumination light, determining that the photovoltaic cell layer converts visible light in ambient light into electrical energy by an output power: total output power of the photovoltaic cell layer; The total output power of the photovoltaic cell layer is determined according to the charging current and the voltage of the terminal battery; η% is generated when the photovoltaic cell layer converts invisible light in ambient light into electrical energy when the ambient light is natural light. The proportion of output power in the total output power of the photovoltaic cell layer.

Further, the processor 81 is specifically configured to output a characterization voltage that characterizes the magnitude of the charging current;

The processor 81 is further configured to determine that the ambient light is natural light when the characteristic voltage is greater than a preset value, and determine that the ambient light is illumination light when the characteristic voltage is not greater than a preset value.

It should be noted that the processor 81 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the program of the present invention. Integrated circuit.

The control system provided by the embodiment of the present invention can be applied to the terminal screen shown in any of FIG. 1, FIG. 2 or FIG. 3, and can improve the detection precision of the ambient light intensity, thereby improving the control precision of the terminal screen brightness.

The brightness control of the above terminal screen provided according to the above embodiment of the present invention is based on the same inventive concept. The system of the present invention further provides a method for controlling the brightness of the terminal screen, as shown in FIG. 9, which may include the following steps:

Step 901: Determine an output power of a photovoltaic cell layer of the terminal screen.

Step 902: Determine an ambient light intensity according to the determined output power.

Step 903: Control the brightness of the screen of the terminal according to the determined ambient light intensity.

Step 901: determining output power of the photovoltaic cell layer of the terminal screen, specifically:

Determining the output power produced by the photovoltaic cell layer to convert visible light in ambient light into electrical energy.

In a specific embodiment of the present invention, determining the output power generated by the photovoltaic cell layer to convert the visible light in the ambient light into the electrical energy may include:

Charging the terminal battery based on the electrical energy output from the photovoltaic cell layer;

Charging current when sampling the terminal battery;

Based on the charging current, the output power generated by the photovoltaic cell layer to convert visible light in ambient light into electrical energy is determined.

Further, determining the output power generated by the photovoltaic cell layer converting the visible light in the ambient light into the electrical energy according to the charging current when the terminal battery is charged may include:

When the ambient light is natural light, determining that the photovoltaic cell layer converts visible light in the ambient light into electrical energy produces an output power of (1-η%) of the total output power of the photovoltaic cell layer;

When the ambient light is illumination light, determining that the photovoltaic cell layer converts visible light in the ambient light into electrical energy produces an output power of: a total output power of the photovoltaic cell layer;

Wherein, the total output power of the photovoltaic cell layer is determined according to the charging current and the voltage of the terminal battery; η% is the output power generated by the photovoltaic cell layer converting the invisible light in the ambient light into electrical energy when the ambient light is natural light. The proportion of the total output power of the layer.

Among them, the invisible light may include, but is not limited to, infrared light.

Preferably, when the charging current of the terminal battery is charged, a characteristic voltage characterizing the magnitude of the charging current is specifically obtained;

Specifically, the ambient light can be determined as follows:

When the characterization voltage is greater than the preset value, determining that the ambient light is natural light; and when the characterization voltage is not greater than the preset value, determining that the ambient light is illumination light.

The control method provided by the embodiment of the present invention can be applied to the terminal screen shown in any of FIG. 1, FIG. 2 or FIG. 3, and the specific steps may be specifically referred to the specific description of the foregoing embodiment of the brightness control system, and details are not described herein.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing a particular function in a block or blocks of a flow or a flow and/or a block diagram of a flow diagram.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements a particular function in a block or blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. Instructions are provided for implementation in the flowchart A process or a plurality of processes and/or a block diagram of the steps of a particular function in a block or blocks.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

A terminal screen, comprising a protective layer, a photovoltaic cell layer and a display layer in order from top to bottom, wherein:

The protective layer is configured to protect the photovoltaic cell layer and the display layer;

The photovoltaic cell layer is configured to convert light energy into electrical energy output;

The display layer is configured to display terminal data information.
The terminal screen of claim 1 , further comprising a touch layer, the touch layer being located between the protective layer and the photovoltaic cell layer, or located in the photovoltaic cell layer and the display Between the layers.
The terminal screen according to claim 1 or 2, wherein the protective layer is specifically a glass protective layer.
A terminal screen according to any one of claims 1 to 3, wherein the photovoltaic cell layer is specifically an organic compound photovoltaic cell layer.
A brightness control system for a terminal screen, wherein the terminal screen includes a protective layer, a photovoltaic cell layer and a display layer in order from top to bottom, wherein: the protective layer is used to protect the photovoltaic cell layer and the a display layer; the photovoltaic cell layer for converting light energy into an electrical energy output; the display layer for displaying terminal data information; the brightness control system comprising:

a determining module, configured to determine an output power of the photovoltaic cell layer of the terminal screen; determining an ambient light intensity according to the determined output power;

And a control module, configured to control brightness of the screen of the terminal according to the determined ambient light intensity.
The brightness control system according to claim 5, wherein the determining module is specifically configured to determine an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy.
The brightness control system of claim 6 further comprising:

a charging module, configured to charge the terminal battery based on the electrical energy output by the photovoltaic cell layer;

a sampling module, configured to sample a charging current when the terminal battery is charged;

The determining module is specifically configured to determine, according to the charging current, an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy.
The brightness control system according to claim 7, wherein the determining module is configured to determine an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy when the ambient light is natural light. Is: (1-η%) of the total output power of the photovoltaic cell layer; when the ambient light is illumination light, determining that the photovoltaic cell layer converts visible light in ambient light into electrical energy to generate output power: The total output power of the photovoltaic cell layer;

Wherein, the total output power of the photovoltaic cell layer is determined according to the charging current and the voltage of the terminal battery; n% is that when the ambient light is natural light, the photovoltaic cell layer converts invisible light in ambient light into electrical energy. The resulting output power is a percentage of the total output power of the photovoltaic cell layer.
The brightness control system of claim 8 wherein said invisible light comprises infrared light.
The brightness control system according to claim 8 or 9, wherein the sampling module is specifically configured to output a characterization voltage characterizing the magnitude of the charging current;

The determining module is further configured to: when the characterization voltage is greater than a preset value, determine that the ambient light is natural light; and when the characterization voltage is not greater than a preset value, determine that the ambient light is illumination light.
A brightness control method for a terminal screen, wherein the terminal screen includes a protective layer, a photovoltaic cell layer and a display layer in order from top to bottom, wherein: the protective layer is used to protect the photovoltaic cell layer and the a display layer; the photovoltaic cell layer for converting light energy into an electrical energy output; the display layer for displaying terminal data information; the brightness control method comprising:

Determining an output power of the photovoltaic cell layer of the terminal screen;

Determining ambient light intensity based on the determined output power;

The brightness of the terminal screen is controlled according to the determined ambient light intensity.
The brightness control method according to claim 11, wherein the output power of the photovoltaic cell layer of the terminal screen is determined, specifically:

Determining an output power produced by the photovoltaic cell layer converting visible light in ambient light into electrical energy.
The brightness control method according to claim 12, wherein determining the output power generated by the photovoltaic cell layer to convert visible light in ambient light into electrical energy comprises:

Charging the terminal battery based on the electrical energy output by the photovoltaic cell layer;

Sampling the charging current when the terminal battery is charged;

And determining, according to the charging current, an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy.
The brightness control method according to claim 13, wherein determining the output power generated by the photovoltaic cell layer converting visible light in the ambient light into electrical energy according to the charging current when the terminal battery is charged includes:

When the ambient light is natural light, determining that the photovoltaic cell layer converts visible light in ambient light into electrical energy produces an output power of (1-η%) of the total output power of the photovoltaic cell layer;

When the ambient light is illumination light, determining that the photovoltaic cell layer converts visible light in ambient light into electrical energy produces an output power of: a total output power of the photovoltaic cell layer;

Wherein, the total output power of the photovoltaic cell layer is determined according to the charging current and the voltage of the terminal battery; n% is that when the ambient light is natural light, the photovoltaic cell layer converts invisible light in ambient light into electrical energy. The resulting output power is a percentage of the total output power of the photovoltaic cell layer.
The brightness control method according to claim 14, wherein the invisible light comprises infrared light.
The brightness control method according to claim 14 or 15, wherein when the charging current of the terminal battery is sampled, a characteristic voltage characterizing the magnitude of the charging current is specifically obtained;

Specifically, the following method is used to determine whether the ambient light is natural light:

When the characterization voltage is greater than a preset value, determining that the ambient light is natural light; when the characterization voltage is not When it is greater than the preset value, it is determined that the ambient light is illumination light.
A brightness control system for a terminal screen, wherein the terminal screen includes a protective layer, a photovoltaic cell layer and a display layer in order from top to bottom, wherein: the protective layer is used to protect the photovoltaic cell layer and the a display layer; the photovoltaic cell layer for converting light energy into an electrical energy output; the display layer for displaying terminal data information; the brightness control system comprising:

a processor for determining an output power of a photovoltaic cell layer of the terminal screen; determining an ambient light intensity according to the determined output power; and controlling a brightness of the terminal screen according to the determined ambient light intensity.
The brightness control system according to claim 17, wherein the processor is specifically configured to determine an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy.
The brightness control system of claim 18, further comprising:

a charger for charging the terminal battery based on the electrical energy output by the photovoltaic cell layer;

The processor is further configured to sample a charging current when the terminal battery is charged;

The processor is specifically configured to determine, according to the charging current, an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy.
The brightness control system according to claim 19, wherein the processor is configured to determine an output power generated by the photovoltaic cell layer converting visible light in ambient light into electrical energy when the ambient light is natural light. Is: (1-η%) of the total output power of the photovoltaic cell layer; when the ambient light is illumination light, determining that the photovoltaic cell layer converts visible light in ambient light into electrical energy to generate output power: The total output power of the photovoltaic cell layer; wherein the total output power of the photovoltaic cell layer is determined according to the charging current and the voltage of the terminal battery; η% is when the ambient light is natural light, the photovoltaic cell layer The ratio of the output power produced by the invisible light converted into electrical energy in ambient light to the total output power of the photovoltaic cell layer.
A brightness control system according to claim 20, wherein said processor has The body is configured to output a characterization voltage characterizing the magnitude of the charging current;

The processor is further configured to: determine that the ambient light is natural light when the characteristic voltage is greater than a preset value; and determine that the ambient light is illumination light when the characteristic voltage is not greater than a preset value.