CN111880678A - Control method, device and equipment and backlight module - Google Patents
Control method, device and equipment and backlight module Download PDFInfo
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- CN111880678A CN111880678A CN202010584626.7A CN202010584626A CN111880678A CN 111880678 A CN111880678 A CN 111880678A CN 202010584626 A CN202010584626 A CN 202010584626A CN 111880678 A CN111880678 A CN 111880678A
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Abstract
The embodiment of the invention provides a control method, a control device, control equipment and a backlight module. The control method comprises the following steps: acquiring a touch instruction sent to display equipment by a user, wherein the touch instruction comprises a touch point of the user to the display equipment; determining a local area where a touch point is located in the display device; and reducing the brightness of the local area where the touch point is located. According to the method, the fact that the sight of the user sending the touch instruction is concentrated in the local area where the touch point is located when the user watches the display device is determined through the touch instruction, and then the brightness of the local area where the touch point is located is reduced, so that the user close to the display device does not feel dazzling due to overhigh brightness, the user far away from the display device can clearly see the display content on the display device, and the visual experience of the user is improved.
Description
Technical Field
The invention relates to the technical field of internet, in particular to a control method, a control device, control equipment and a backlight module.
Background
Currently, in public areas such as classrooms, conference rooms, and the like, interactive display devices are often provided for writing communications.
Taking an electronic whiteboard set in a classroom as an example, the farther from the electronic whiteboard, the poorer the viewing effect for the viewer. In order to enable a viewer far away from the electronic whiteboard to clearly see the board book, the electronic whiteboard needs to be brightened. However, the brightness of the electronic whiteboard is increased, which may cause a viewer (such as a teacher writing a blackboard writing) near the electronic whiteboard to feel dazzling.
Therefore, how to improve the visual experience of the user on the display device becomes a technical problem to be solved urgently.
Disclosure of Invention
The embodiment of the invention provides a control method, a control device, control equipment and a backlight module, which are used for improving the visual experience of a user.
In a first aspect, an embodiment of the present invention provides a control method, where the control method includes:
acquiring a touch instruction sent to display equipment by a user, wherein the touch instruction comprises a touch point of the user to the display equipment;
determining a local area where a touch point is located in the display device;
and reducing the brightness of the local area where the touch point is located.
In a second aspect, an embodiment of the present invention provides a control apparatus, which is applied to a display device, and includes:
the acquisition module is used for acquiring a touch instruction sent to the display equipment by a user, wherein the touch instruction comprises a touch point of the user to the display equipment;
the determining module is used for determining a local area where the touch point is located in the display equipment;
and the control module is used for reducing the brightness of the local area where the touch point is located.
In a third aspect, an embodiment of the invention provides a backlight module, which includes a processor, wherein the backlight module includes a first circuit board and a second circuit board
The processor is used for acquiring a touch instruction sent to the display equipment by a user, wherein the touch instruction comprises a touch point of the user to the display equipment; determining a local area where a touch point is located in the display device; and reducing the brightness of the local area where the touch point is located.
In a fourth aspect, an embodiment of the present invention provides an electronic device, which includes a processor and a memory, where the memory stores executable code, and when the executable code is executed by the processor, the processor is enabled to implement at least the control method in the first aspect.
An embodiment of the present invention provides a non-transitory machine-readable storage medium having stored thereon executable code, which, when executed by a processor of an electronic device, causes the processor to implement at least the control method of the first aspect.
In the control scheme provided by the embodiment of the invention, a touch instruction sent by a user to a display device is obtained first, wherein the touch instruction comprises a touch point of the user to the display device, and the touch point is, for example, a contact point of a finger and the display device when the finger of the user touches the display device. The touch instruction reflects the operation intention of the user on the display device, and therefore, the touch point in the display device is the position intended to be controlled when the user sends the touch instruction. The distance between the user who sends the touch instruction and the display device is short, so that the range in which the user can pay attention to the display device is limited. Obviously, when a user who issues a touch instruction views the display device, the user must focus the line of sight on the touch point and a local area around the touch point (i.e., a local area where the touch point is located). Furthermore, by reducing the brightness of the local area where the touch point is located, the phenomenon that a user close to the display device feels dazzling due to overhigh brightness can be avoided, and the visual experience of the user is improved. And because the brightness of other areas except the local area where the touch point is located in the display equipment does not need to be reduced, the display content on the display equipment can be clearly seen by a user far away from the display equipment.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a usage scenario of a display device according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a control method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a transparent layer according to an embodiment of the disclosure;
fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present invention;
FIG. 5 is a schematic flow chart of another control method according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a control device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device corresponding to the control device provided in the embodiment shown in fig. 6.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
In addition, the sequence of steps in each method embodiment described below is only an example and is not strictly limited.
Fig. 1 is a schematic diagram of a usage scenario of a display device according to an embodiment of the present invention, as shown in fig. 1, the scenario includes: a display device and a plurality of users viewing the display device. In fig. 1, a user a is closer to the display device and a user b is farther from the display device.
In fact, the user a may be performing a touch operation on the display device. For example, the display device is an electronic whiteboard provided in a classroom, the user a is a teacher, and the teacher may be selecting lecture contents on the electronic whiteboard. And the user b is a student and is far away from the electronic whiteboard.
With reference to fig. 1, the control scheme provided by the embodiment of the present invention solves the practical problems that: the viewing effect of a display device is typically affected by the brightness of the device and the viewing distance. I.e. the farther away from the display device, the lower the brightness of the display device, the poorer the viewing effect. In fig. 1, in order to enable a user b far from the display device to see the display content on the display device, the display device needs to be turned on, but the turning on of the display device causes a user a (such as a teacher) near the display device to feel dazzling when viewing the display content on the display device.
Therefore, how to improve the visual experience of the user on the display device for the user at different distances from the display device becomes an urgent technical problem to be solved.
In order to solve the above technical problem, a core idea of a control scheme provided by an embodiment of the present invention is:
firstly, a touch instruction sent to a display device by a user is obtained, wherein the touch instruction comprises a touch point of the user to the display device. Most users sending touch instructions are users close to the display device, so that the range in which such users can pay attention to the display device is limited, and therefore, in order to avoid visual stimulation brought to the users due to overhigh brightness, the position where the sight is concentrated when the users watch the display device needs to be determined first, and then the brightness of the concentrated sight is reduced, so that the visual experience of the users is improved. Generally, a touch instruction generally reflects the operation intention of a user on a display device, and thus a touch point in the display device can be regarded as a position intended to be controlled by such a user when the user issues the touch instruction. Therefore, by reducing the brightness of the local area where the touch point is located, the visual stimulation of the display device to the user can be reduced, and the user close to the display device is prevented from feeling dazzling due to overhigh brightness. Meanwhile, because the range that the user nearer to the display device can pay attention to in the display device is limited, the brightness of other areas in the display device except the local area can not influence the visual experience of the user nearer to the display device, so that the brightness of other areas does not need to be changed, the user farther from the display device can be ensured to clearly see the display content on the display device, and the visual experience of the user is also facilitated to be improved.
The following description will be made of the execution of the control method in conjunction with the following embodiments.
Fig. 2 is a flowchart of a control method according to an embodiment of the present invention, where the control method is applied to a display device. As shown in fig. 2, the control method includes the steps of:
201. the method comprises the steps of obtaining a touch instruction sent to display equipment by a user, wherein the touch instruction comprises a touch point of the user to the display equipment.
202. And determining a local area where the touch point is located in the display device.
In the embodiment of the invention, in order to reduce the visual stimulation of the display device to the user at a short distance, the position where the sight line is concentrated when the user watches the display device needs to be determined, so that the brightness of the position where the sight line is concentrated is reduced, and the visual stimulation brought to the user by overhigh brightness is avoided. Therefore, a touch instruction sent by a user to the display device needs to be obtained first, and then the subsequent steps are realized based on the touch points included in the control instruction.
The embodiment of the invention is suitable for various electronic devices with display functions, and the electronic devices are simply called display devices in the text. The embodiment of the invention is particularly suitable for interactive display equipment. The interactive display device is, for example, a display device provided in a public area, including, but not limited to, an electronic whiteboard provided in a classroom, a conference screen provided in a conference room, and an electronic score screen provided in a basketball court.
The display equipment can be integrated with one or combination of multiple functions of a projector, an electronic whiteboard, a curtain, a sound device, a television, a video conference terminal and the like, so that the display equipment can be suitable for group communication occasions, and the systematized conference requirements of remote audio and video communication in a conference, high-definition display of conference documents in various formats, video file playing, field sound, screen writing, file marking, storage, printing, distribution and the like are intensively met. Meanwhile, the display equipment is also internally provided with a television receiving function and surround sound, and can meet the requirements of audio-visual entertainment during working. The display devices are widely applied to the fields of education and teaching, enterprise meetings, commercial exhibition and the like, and can effectively improve the communication environment and improve the group communication efficiency.
In practical applications, the display device is, for example, an Interactive intelligent tablet (IIP), where the Interactive intelligent tablet is an integrated device that controls display contents through a touch technology to implement human-computer interaction operations. The interactive smart tablet is referred to herein as a smart tablet. The smart Panel includes, but is not limited to, a Plasma Display Panel (PDP), a Liquid Crystal Display (LCD), and a Light Emitting Diode (LED).
Optionally, the display device has a sensor for collecting touch information, so as to obtain a touch instruction sent to the display device by a user through the sensor. In practical applications, the touch command is, for example: an operation when the user touches the screen of the display device, and an operation trajectory (hereinafter also referred to as a movement trajectory of the touch point). Taking the display device as an electronic whiteboard as an example, when a user uses a touch pen to perform writing on the electronic whiteboard, the touch instruction includes, for example, a movement track left by the touch pen contacting the display device, and the movement track can be displayed as writing, graphics, and the like.
Specifically, in 201, when the user issues a touch instruction to the display device, the display device acquires the touch instruction of the user to identify where the user's sight line is focused from the touch instruction.
Optionally, the display device may obtain a touch instruction issued when the user touches the display device, where the touch instruction includes a touch point of the user on the display device. Optionally, a moving track of the touch point may be formed when the touch point continuously moves. The touch command is, for example: the user uses a finger to tap the display device so as to select a certain display content, and in this case, the touch point is a contact point between the finger and the display device. Or, the user uses the stylus to write on the display device to form a blackboard writing, in this case, the touch point is the contact point between the stylus and the display device, and the plurality of touch points formed during writing may finally form the movement track of the stylus, i.e. the blackboard writing.
Thus, in 202, the display device may determine a local area in the display device where the touch point is located.
In fact, the local area where the touch point is located in the display device contains the part of the display device selected by the user through the touch instruction. The local area is, for example, a display area where a certain display content is located in the display device when the user taps the conference screen to select the display content. Alternatively, the local area may also include a portion covered by the movement track of the touch point in the display device, and the local area is, for example, a display area where a writing board currently written by the user is located in the electronic whiteboard.
After the user touches the display device with a finger or a touch pen (such as a passive pen), the display device may identify a touch point of the user on the display device in S201, and locate a position coordinate where the touch point is located in the display device. Further, in S202, the position coordinates of the touch point are taken as a center in the display device, and a display area within a preset range around the center is taken as a local area where the touch point is located in the display device. It is understood that the setting method of the preset range is different for different types of display devices. In practical application, the shape and size of the preset range can be adjusted according to the watching experience of the user.
Alternatively, in another embodiment, the display device may be divided into a plurality of local areas in advance, and the correspondence between the position coordinates of each point in the touch screen and the plurality of local areas may be entered. Further, in S202, a local area corresponding to the touch point is determined from the plurality of local areas based on the position coordinates of the touch point, as the local area where the touch point is located in the display device.
In practical applications, the display device may include a touch positioning module, and the touch positioning module may be capable of identifying and positioning the touch points. Alternatively, the touch location module may be implemented as an infrared touch module and a capacitive touch module.
The Infrared Touch module is, for example, an Infrared technology Touch screen (Infrared Touch screen), which is herein referred to simply as an Infrared Touch screen. The infrared touch screen consists of a touch screen, an infrared transmitting module and a receiving module, wherein the infrared transmitting module and the receiving module are arranged on an outer frame of the touch screen. The infrared emitting module and the receiving module construct an infrared detection network on the surface of the touch screen, and an object (such as a finger) for sending a touch instruction can change infrared rays on a contact point (namely a touch point), so that position coordinates of the touch point are obtained to respond to the touch instruction.
The capacitive touch module is, for example, a capacitive touch screen, which is referred to as a capacitive screen for short. The capacitance screen is a four-layer composite glass screen, the inner surface and the interlayer of the glass screen are respectively coated with a layer of Indium Tin Oxide (ITO), the outermost layer is a thin silica glass protective layer, such as a silica glass protective layer with the thickness of 0.0015mm, the interlayer ITO coating is used as a working surface, four electrodes are led out from four corners, and the inner layer ITO is a shielding layer to ensure a good working environment. When the finger of the user touches the metal layer, a coupling capacitor is formed between the user and the surface of the capacitive screen due to the electric field of the human body. For high frequency current, the capacitor is a direct conductor and the finger draws a small current from the touch point. The absorbed currents respectively flow out of the electrodes at the four corners of the capacitive screen, and the positions of the touch points are obtained by accurately calculating the proportions of the four currents because the currents flowing out of the four electrodes are in direct proportion to the distances from the fingers to the four corners. The accuracy of the position coordinates can reach 99%, and the response speed of the capacitive screen is less than 3 ms.
203. And reducing the brightness of the local area where the touch point is located.
In the embodiment of the invention, the display equipment comprises a backlight source, a polaroid and a light-transmitting layer arranged between the backlight source and the polaroid. Optionally, the polarizer includes an upper polarizer and a lower polarizer. Among at least two polaroids included in the display equipment, the lower polaroid is closer to the backlight source. In practical applications, in order to make the light-transmitting layer closer to the backlight source and to make the brightness control effect better, the light-transmitting layer may be disposed between the backlight source and the lower polarizer. Optionally, the backlight is a backlight panel. The backlight source, or backlight module, is mainly used to provide light energy. The upper polarizer and the lower polarizer both have the function of allowing light to pass through in a single direction. The lower polarizer is used for allowing the light emitted by the backlight source to pass in a single direction.
Optionally, the light transmissive layer comprises a plurality of light transmissive regions. Aiming at the display equipment with different sizes, the division of a plurality of light transmission areas in the light transmission layer is adjusted to meet the requirements of different use scenes. In order to make the brightness control effect of the display device more exquisite, the number and area of the light-transmitting areas can be determined according to the use scene of the display device. Taking the transparent layer shown in fig. 3 as an example, the transparent layer is divided into M × N transparent regions. The size of the light-transmitting areas can be equal or unequal according to actual requirements.
For example, for an electronic whiteboard in a classroom, because the teacher's range of motion and height are limited, the electronic whiteboard generally has a geometric center portion with a large number of uses and a peripheral portion with a small number of uses, and therefore, to make the brightness change of the display device more exquisite, the area of the light-transmitting region corresponding to the geometric center portion is smaller than the area of the light-transmitting region corresponding to the peripheral portion.
In practice, one possible structure of the display device is shown in fig. 4. In fig. 4, the display apparatus 400 includes an upper polarizer, an upper glass substrate, a color filter, an upper conductive layer, a liquid crystal layer, a thin film transistor layer, a lower glass substrate, a lower polarizer, a light transmissive layer, and a backlight. In the display device 400 shown in fig. 4, the upper and lower glass substrates each have a groove structure on the inner side thereof, and an alignment film is attached to the groove structure so that liquid crystal molecules are aligned along the grooves. The ITO transparent conductive layer, i.e., the upper conductive layer, is used to provide a conductive path. The thin film transistor layer functions like a switch, and the thin film transistor can control signal voltage on the IC control circuit and transmit the signal voltage to the liquid crystal molecules so as to determine the deflection angle of the liquid crystal molecules. The liquid crystal molecular layer, namely the liquid crystal layer, is used for changing the polarization state of light, and the arrangement and the polarization state of the liquid crystal molecular layer are determined by electric force and elastic force. The color filter is used for mixing and adjusting each color and brightness.
It should be noted that the display device according to the embodiment of the present invention is not limited to the structure and the arrangement order shown in fig. 4. For display devices with different structures, the positions of the light-transmitting layers are different.
In combination with the above-described structure of the display device, that is, the display device includes a backlight source, a polarizer and a light-transmitting layer disposed between the backlight source and the polarizer, in 203, the brightness of the local region where the touch point is located is reduced, which may be implemented as:
selecting a first light transmission region corresponding to a first local region where the touch point is located from the light transmission layer, wherein the light transmission layer comprises a plurality of light transmission regions, and the first light transmission region is one or more of the plurality of light transmission regions; and adjusting the light transmittance of the first light transmission area to reduce the brightness of the first local area.
For the purpose of distinguishing, the local area where the touch point is located in the current brightness adjustment process is called a first local area.
In an embodiment of the invention, the transparent layer includes a plurality of transparent regions. Alternatively, the display area of the display device may be divided into a plurality of partial areas, and the correspondence between the plurality of partial areas and the plurality of light-transmitting areas may be determined. Specifically, the plurality of local regions correspond to the plurality of light-transmitting regions one to one, for example, the first local region may correspond to one of the plurality of light-transmitting regions, and the first light-transmitting region is the light-transmitting region. Alternatively, each local region may correspond to a plurality of the plurality of light-transmitting regions. For example, assuming that the light-transmitting layer includes n light-transmitting regions, the first local region may correspond to m light-transmitting regions of the n light-transmitting regions, where n is greater than m. Optionally, the correspondence between the plurality of local areas and the plurality of light-transmitting areas may be adjusted according to actual requirements, so as to flexibly control the brightness adjustment range.
The light transmittance of the first light-transmitting region is represented by: the first light-transmitting area shields light radiated from the backlight to the first partial area in the display device. That is, the higher the light transmittance of the first light-transmitting area is, the lower the degree of shielding light emitted from the backlight source is, and thus, the higher the brightness of the first partial area in the corresponding display device is. Of course, the principle of brightness control of the other local areas in the display device is similar to that of the first local area, and the similarities are not expanded.
For example, assuming that the display device is an electronic whiteboard provided in a classroom and the teacher is writing on the board. Assuming that the first local area is a certain local area P in the electronic whiteboard, if it is detected that the stylus of the teacher enters the local area P, it may be determined that the teacher will perform writing in the local area P, in this case, a light-transmitting area Q (i.e., a first light-transmitting area) corresponding to the local area P may be selected from the light-transmitting layers, and the light-transmitting rate of the light-transmitting area Q may be reduced, for example, if the color of the light-transmitting area Q changes from colorless to colored, so that the brightness of the local area P is reduced, and the teacher may not feel dazzling. Meanwhile, the light transmittance of the areas except for other light transmission areas is unchanged, so that the brightness of other local areas except for the local area P in the electronic whiteboard is still unchanged, and students can conveniently watch the blackboard-writing in other local areas.
Optionally, the touch point is taken as the center of the first local area, so that the center of the first light-transmitting area is determined based on the position coordinates of the touch point. In order to improve the visual experience of the user, the light transmittance in the first light transmission area can be changed in a gradual trend from the center to the outside, that is, the closer to the center of the first light transmission area, the lower the light transmittance is, so that the brightness of the first partial area is gradually changed in the same trend.
Alternatively, the light transmittance of the first light-transmitting area may be set to be the lowest, and the light transmittances of the surrounding light-transmitting areas may be set to be at a plurality of levels according to the distance from the position of the touch point with the first light-transmitting area as the center. For example, if the light transmittance of the first light-transmitting area is set to be the lowest and the level of the first light-transmitting area is set to be the highest, the closer the position of the touch point in the surrounding light-transmitting areas is, the higher the level of the light-transmitting area is, and the lower the light transmittance of the light-transmitting area is. Therefore, the brightness of the display equipment is in a gradual change trend, the stimulation to the vision of the user is reduced, and the visual experience of the user is improved.
Specifically, adjusting the light transmittance of the first light-transmitting area to reduce the brightness of the first local area may be implemented as: and changing the first light transmission area from the first initial light transmission rate to the target light transmission rate by adjusting the temperature of the first light transmission area, so that the brightness of the first local area is reduced to the target brightness.
The first initial light transmittance is higher than the target light transmittance, the light-transmitting layer is made of a thermochromic material, and the deeper the color of the light-transmitting layer is, the lower the light transmittance of the light-transmitting layer is.
The light transmitting layer is made of thermochromic Materials (thermochromic Materials), and the deeper the color of the light transmitting layer, the lower the light transmitting rate of the light transmitting layer. Thermochromic (Thermochromism) refers to the property of certain compounds and mixtures to change in the visible absorption spectrum when heated or cooled. Substances with thermochromic properties are called thermochromic materials. From the thermodynamic perspective, thermochromic materials can be divided into two broad categories, namely irreversible thermochromic materials and reversible thermochromic materials. In practical applications, the light-transmitting layer can be made of a reversible thermochromic material.
The reversible thermochromic material is characterized in that when the material is heated to a certain temperature or a temperature range, the color of the material is obviously changed to show a new color, and after the temperature is restored to the initial temperature, the color is restored, so that the color change is reversible. Therefore, the material is an intelligent material with a color memory function and can be repeatedly used. Reversible thermochromic materials have different color change mechanisms due to the different properties of these materials. For example, at normal temperature, the reversible thermochromic material shows a certain specific color, the color disappears and becomes colorless after being heated, and the original color is immediately recovered after being cooled; or the reversible thermochromic material is colorless at normal temperature, and the color becomes darker after being heated or becomes another color, and the reversible thermochromic material returns to the original colorless after being cooled.
Based on the principle, in order to enable the light transmission layer to play a role in blocking light, different thermochromic materials can be selected to be made into the light transmission layer according to the characteristics of different backlight sources. In the light-transmitting layer, the light transmittance of each light-transmitting region varies with a change in temperature, and thus, the brightness of each partial region in the display device varies with a change in light transmittance of the corresponding light-transmitting region.
For adjusting the temperature of the first light transmission area, the purpose of controlling the light transmittance of the first light transmission area is achieved, and corresponding temperature adjusting modules are required to be arranged for the plurality of light transmission areas. Therefore, the temperature of the corresponding light-transmitting area is controlled through the temperature adjusting module. Alternatively, the correspondence relationship between the plurality of local regions and the plurality of light-transmitting regions is predetermined. For example, the transparent layer is divided into a plurality of transparent regions, and the temperature adjustment modules are disposed in the plurality of transparent regions. The plurality of light transmitting areas can correspond to the plurality of temperature adjusting modules one to one. Alternatively, the plurality of light-transmitting regions may correspond to the same temperature adjustment module, for example, a plurality of adjacent light-transmitting regions are divided into a group, and each group of light-transmitting regions corresponds to one temperature adjustment module. In practical application, the specific setting mode of the temperature adjusting module can be determined according to actual requirements.
Specifically, the step of adjusting the temperature of the first light transmission region may be implemented as: applying a first-direction current to a temperature adjusting module corresponding to the first light-transmitting area, and triggering the temperature adjusting module to release heat so as to heat the first light-transmitting area; or, a second direction current is applied to the temperature adjusting module corresponding to the first light transmission area, and the temperature adjusting module is triggered to absorb heat so as to cool the first light transmission area. Wherein, the first direction current and the second direction current are opposite to each other.
In practical applications, the temperature adjustment module is an electric circuit having a heating capability and a cooling capability, such as a thermoelectric effect element. Thermoelectric effect elements include, but are not limited to, peltier elements, seebeck elements. In the case of a peltier element, the peltier element includes a cold side, a hot side, and a conductor loop connected to the cold side and the hot side. The conductor loop is composed of, for example, a P-type thermoelectric semiconductor and an N-type thermoelectric semiconductor.
Still taking the light-transmitting layer shown in fig. 3 as an example, each light-transmitting region is provided with a corresponding temperature adjustment module. The working principle of the temperature adjustment module corresponding to each light-transmitting area is described in detail below by taking the first light-transmitting area as an example:
the temperature adjusting module corresponding to the first light-transmitting area is assumed to be a peltier element. The Peltier element mainly uses the Peltier Effect (Peltier Effect) to realize heating and cooling of the first light-transmitting region. The peltier effect means that when a current passes through a circuit composed of different conductors, heat absorption and heat release phenomena occur at joints of the different conductors along with the difference in current direction, in addition to irreversible joule heat generation. In short, under the action of an external electric field, charge generates directional motion, and a part of internal energy is brought to the other end of the electric field. Specifically, since the charges are at different energy levels in different materials, excess energy is released when the charges move from a high level to a low level; conversely, when moving from a low level to a high level, energy is absorbed from the outside. Energy is absorbed in the form of heat at the interface of the two materials. The peltier effect is reversible and if the direction of current flow is reversed, the heat absorption is converted to heat release.
Based on the peltier effect, through applying first direction current to the temperature regulation module that first printing opacity is regional to, trigger this temperature regulation module and release heat to the realization mode that heats first printing opacity region can be: it is assumed that the peltier element comprises a cold side, a hot side and a conductor loop connected to the cold side and the hot side. It is assumed that the conductor loop in the peltier element is connected to an external circuit via the ends a, b. When a voltage in a first direction is applied across the ends a and b of the conductor loop of the peltier element by an external circuit, a current flows from the end a to the end b of the conductor loop, and the direction of the current is referred to as a first direction current. Therefore, under the action of the current in the first direction, electrons in the conductor loop generate directional motion, and the hot end of the Peltier element is triggered to release heat to the first light-transmitting area, so that the first light-transmitting area is heated.
Based on the above hypothesis, applying the second direction current to the temperature adjustment module corresponding to the first light transmission region, triggering the temperature adjustment module to absorb heat, so as to implement the cooling of the first light transmission region in the manner that: when a second-direction voltage opposite to the first-direction voltage is applied across the ends a and b of the conductor loop of the peltier element by an external circuit, a current flows from the end b to the end a of the conductor loop, and the current direction is referred to as a second-direction current. Therefore, electrons in the conductor loop generate directional motion under the action of current in the second direction, and the cold end of the Peltier element is triggered to absorb heat of the first light transmission area, so that the first light transmission area is cooled.
Of course, the temperature adjustment modules corresponding to other light-transmitting regions in the light-transmitting layer can also be implemented by using the above principle except for the first light-transmitting region, and are not expanded here.
In practical application, the current applied to the temperature adjusting module can be divided into a plurality of grades according to the color change conditions of different thermochromic materials, so that the brightness change of a local area is smoother, and the visual experience of a user is improved. And setting and fine-tuning each grade according to the actual use scene of the display equipment.
In 203, after the first light-transmitting area is changed from the first initial light transmittance to the target light transmittance by adjusting the temperature of the first light-transmitting area, if the touch point moves out of the first local area, the first light-transmitting area is restored from the target light transmittance to the first initial light transmittance by adjusting the temperature of the first light-transmitting area.
Specifically, the temperature of the first light transmission area is restored to the initial temperature by applying a reverse current to the temperature adjustment module corresponding to the first light transmission area, so that the first light transmission area is restored to the first initial light transmission rate from the target light transmission rate.
For example, continuing to assume that the display device is an electronic whiteboard provided in a classroom and the teacher is writing on the board. Assuming that the first local area is a certain local area P in the electronic whiteboard, if it is detected that the stylus of the teacher moves out of the local area P, it can be determined that the teacher has finished writing on the blackboard in the local area P, in this case, the light transmittance of the light-transmitting area Q (i.e., the first light-transmitting area) corresponding to the local area P can be increased, so that the brightness of the local area P is increased, and the student can watch the writing on the blackboard of the teacher conveniently.
In practical applications, the movement track of the touch point may also be tracked, so as to control the brightness of the corresponding local area in the display device along with the movement track of the touch point, for example, reduce the brightness of the local area where the touch point is located in the display device along with the movement track of the touch point. And if the disappearance of the touch point is detected and another touch point is not detected again within the preset time after the disappearance of the touch point is determined, determining that the user stops touching the display device, and under the condition, restoring the light transmittance of each light transmittance area to the initial light transmittance by adjusting the temperature of each light transmittance area in the light transmittance layer. Optionally, the preset duration may be set according to different usage scenarios to meet the user requirements of each usage occasion.
In 203, after the first light transmission region is changed from the first initial light transmission to the target light transmission by adjusting the temperature of the first light transmission region, if the touch point moves from the first partial region to another partial region in the display device (for distinction, the another partial region is hereinafter referred to as a second partial region), another light transmission region corresponding to the second partial region is selected from the plurality of light transmission regions (for distinction, the another light transmission region is hereinafter referred to as a second light transmission region); changing the second light transmission area from second initial light transmission rate to target light transmission rate by adjusting the temperature of the second light transmission area, so that the brightness of the second local area is reduced to the target brightness, wherein the second initial light transmission rate is higher than the target light transmission rate; and restoring the first light transmission area from the target light transmission rate to the first initial light transmission rate by adjusting the temperature of the first light transmission area.
The first initial transmittance and the second initial transmittance may be the same or different. In practical application, the initial light transmittance of different light transmission areas can be set to different values according to ambient light, so that negative effects brought by the viewing experience of a user (for example, the problem that the user cannot clearly see the display content due to reflection of light display) are reduced, and the viewing experience of the user is improved. For example, the initial transmittance set for the light-transmitting area on one side of the display device close to the window is higher than the initial transmittance on the other side of the display device, so that the brightness in the area on one side of the display device close to the window is higher, and the visual experience reduction caused by light reflection is avoided.
It is understood that the step of adjusting the temperature of the second light-transmitting region is similar to the step of adjusting the temperature of the first light-transmitting region, and the description of the similarity is omitted.
For example, continuing to assume that the display device is an electronic whiteboard provided in a classroom and the teacher is writing on the board. Assuming that the first local area is a certain local area P in the electronic whiteboard and the second local area is a certain local area T in the electronic whiteboard, if it is detected that the pointer of the teacher moves from the local area P to the local area T, it can be determined that the teacher has finished writing on the board in the local area P, that is, the teacher is going to perform writing on the board in the local area T. In this case, the transmittance of the light-transmitting area Q (i.e., the first light-transmitting area) corresponding to the local area P may be increased, for example, the color of the light-transmitting area Q changes from color to color, so that the transmittance of the light-transmitting area Q increases from the target transmittance to the initial value 1 before the change (i.e., the first initial transmittance), thereby facilitating the students to watch the blackboard-writing of the teacher; and the light transmittance of the light-transmitting area R (namely the second light-transmitting area) corresponding to the local area T is adjusted to be low, for example, the color of the light-transmitting area R is changed from colorless to colored, so that the light transmittance is reduced from the initial value 2 (namely the second initial light transmittance) to the target light transmittance, and the teacher can be prevented from feeling dazzling.
Optionally, a transition region (e.g., a transition zone) is disposed at the boundary of each light-transmitting region, wherein the transmittance of the transition region is an average of the transmittances of the surrounding light-transmitting regions. For example, assuming that the first light-transmitting area is adjacent to the second light-transmitting area, a transition area may be disposed at a boundary between the first light-transmitting area and the second light-transmitting area, wherein the light transmittance of the transition area is an average value of the first light-transmitting area and the second light-transmitting area.
In the execution process of the control method shown in fig. 2, it is determined through the touch instruction that the line of sight of the user is concentrated in the local area where the touch point is located when the user watches the display device, and then the brightness of the local area where the touch point is located is reduced, so that the user near the display device does not feel dazzling due to too high brightness, and because the brightness of other areas except the local area in the display device does not need to be reduced, the user far from the display device is ensured to be able to clearly see the display content on the display device, and the visual experience of the user is improved.
Fig. 5 is a flowchart illustrating a control method according to an embodiment of the present invention. The control method is applied to the display device. As shown in fig. 5, the control method may include the steps of:
501. the method comprises the steps of obtaining a touch instruction sent to display equipment by a user, wherein the touch instruction comprises a touch point of the user to the display equipment.
502. And determining a local area where the touch point is located in the display device.
503. Selecting a light-transmitting area (for distinguishing, the light-transmitting area is referred to as a first light-transmitting area) corresponding to a local area (for distinguishing, the local area is referred to as a first local area) where the touch point is located from the light-transmitting layer, and reducing the light transmittance of the first light-transmitting area by adjusting the temperature of the first light-transmitting area, so that the brightness of the first local area is reduced from the initial brightness to the target brightness.
504. If the touch point moves from the first local area to another local area in the display device (for distinction, the local area is referred to as a second local area hereinafter), a light-transmitting area corresponding to the second local area is selected from the plurality of light-transmitting areas (for distinction, the light-transmitting area is referred to as a second light-transmitting area hereinafter), and by adjusting the temperatures of the first light-transmitting area and the second light-transmitting area, the light transmittance of the second light-transmitting area is reduced, the luminance of the second local area is reduced from the initial luminance to the target luminance, and at the same time, the first light-transmitting area is restored from the target light transmittance to the initial light transmittance, and the luminance of the first local area is restored to the initial luminance.
505. If the touch point cannot be detected and the touch point is not detected again within the preset time, restoring each light-transmitting area in the light-transmitting layer to the initial light-transmitting rate by adjusting the temperature of each light-transmitting area in the light-transmitting layer, so that the brightness of each local area is restored to the initial brightness.
The execution order of the above steps 501 to 505 is not limited.
In this embodiment, the transparent layer includes a plurality of transparent regions, and the first transparent region is one or more of the plurality of transparent regions. Optionally, the light transmitting layer is made of a thermochromic material, and the deeper the color of the light transmitting layer, the lower the light transmittance of the light transmitting layer.
For the detailed execution process of the control method provided in this embodiment, reference may be made to the related descriptions in the foregoing other embodiments, which are not repeated herein.
The control device of one or more embodiments of the present invention will be described in detail below. Those skilled in the art will appreciate that these control devices can each be configured using commercially available hardware components through the steps taught in this scheme.
Fig. 6 is a schematic structural diagram of a control device according to an embodiment of the present invention. The control device is applied to a display device. As shown in fig. 6, the control device includes:
an obtaining module 601, configured to obtain a touch instruction sent by a user to the display device, where the touch instruction includes a touch point of the user to the display device;
a determining module 602, configured to determine a local area where the touch point is located in the display device;
the control module 603 is configured to reduce the brightness of the local area where the touch point is located.
Optionally, the display device includes a backlight source, a polarizer, and a light transmissive layer disposed between the backlight source and the polarizer.
The control module 603 is specifically configured to: selecting a first light transmission region corresponding to a first local region where the touch point is located from the light transmission layer, wherein the light transmission layer comprises a plurality of light transmission regions, and the first light transmission region is one or more of the plurality of light transmission regions; and adjusting the light transmittance of the first light transmission area to reduce the brightness of the first local area.
Optionally, when the control module 603 adjusts the light transmittance of the first light-transmitting area to reduce the brightness of the first local area, it is specifically configured to: changing the first light transmission area from a first initial light transmission rate to a target light transmission rate by adjusting the temperature of the first light transmission area, so that the brightness of the first local area is reduced to a target brightness; the first initial light transmittance is higher than the target light transmittance, the euphotic layer is made of a thermochromic material, and the deeper the color of the euphotic layer is, the lower the light transmittance of the euphotic layer is.
Optionally, the control module 603 is further configured to: after the first light transmission area is changed from the first initial light transmission rate to the target light transmission rate by adjusting the temperature of the first light transmission area, if the touch point moves out of the first local area, the first light transmission area is restored from the target light transmission rate to the first initial light transmission rate by adjusting the temperature of the first light transmission area.
Optionally, the control device further comprises a temperature adjusting module for adjusting the temperature of the plurality of light-transmitting areas under the control of the control module 603.
When adjusting the temperature of the first light-transmitting area, the control module 603 is specifically configured to: applying a first-direction current to a temperature adjusting module corresponding to the first light-transmitting area, and triggering the temperature adjusting module to release heat so as to heat the first light-transmitting area; or applying a second direction current to the temperature adjusting module corresponding to the first light transmission area, triggering the temperature adjusting module to absorb heat, and cooling the first light transmission area. Wherein, the first direction current and the second direction current are opposite to each other.
Optionally, the control module 603 is further configured to: after the first light transmission area is changed from the first initial light transmission rate to the target light transmission rate by adjusting the temperature of the first light transmission area, if the touch point moves from the first local area to a second local area in the display device, selecting a second light transmission area corresponding to the second local area from the plurality of light transmission areas; changing the second light transmission area from a second initial light transmission rate to a target light transmission rate by adjusting the temperature of the second light transmission area, so that the brightness of the second local area is reduced to the target brightness, wherein the second initial light transmission rate is higher than the target light transmission rate; restoring the first light-transmitting area from the target light transmittance to the first initial light transmittance by adjusting the temperature of the first light-transmitting area.
Optionally, the polarizer includes a lower polarizer, and the light transmissive layer is disposed between the backlight source and the lower polarizer.
The control device shown in fig. 6 can implement the methods provided in the embodiments shown in fig. 2 to fig. 5, and parts not described in detail in this embodiment may refer to the related descriptions of the embodiments, which are not described herein again.
In one possible design, the structure of the control device shown in fig. 6 may be implemented as an electronic device. The electronic apparatus corresponds to the display device in the foregoing embodiment. As shown in fig. 7, the electronic device may include: a processor 701, a memory 702. The memory 702 stores executable codes thereon, and when the executable codes are executed by the processor 701, at least the processor 701 can realize the control method provided in the embodiment shown in fig. 2.
The electronic device may further include a communication interface 703 for communicating with other devices.
The embodiment of the invention also provides a backlight module which comprises a processor. The processor is configured to acquire a touch instruction sent by a user to the display device, where the touch instruction includes a touch point of the user to the display device; determining a local area where the touch point is located in the display device; and reducing the brightness of the local area where the touch point is located.
Optionally, the backlight module includes a backlight source, a polarizer, and a light-transmitting layer disposed between the backlight source and the polarizer, where the light-transmitting layer includes a plurality of light-transmitting regions, the touch point is located in a first local region of the display device, the light-transmitting layer includes a first light-transmitting region corresponding to the first local region, and the first light-transmitting region is one or more of the plurality of light-transmitting regions.
When the brightness of the local area where the touch point is located is reduced, the processor is specifically configured to: and adjusting the light transmittance of the first light transmission area to reduce the brightness of the first local area.
Optionally, the light-transmitting layer is made of a thermochromic material, and the deeper the color of the light-transmitting layer is, the lower the light transmittance of the light-transmitting layer is.
When the processor adjusts the light transmittance of the first light transmission region to reduce the brightness of the first local region, the processor is specifically configured to: and changing the first light transmission area from a first initial light transmission rate to a target light transmission rate by adjusting the temperature of the first light transmission area, so that the brightness of the first local area is reduced to a target brightness, wherein the first initial light transmission rate is higher than the target light transmission rate.
Optionally, the polarizer includes a lower polarizer, and the light transmissive layer is disposed between the backlight source and the lower polarizer.
Optionally, the processor is further configured to: after the first light transmission area is changed from the first initial light transmission rate to the target light transmission rate by adjusting the temperature of the first light transmission area, if the touch point moves out of the first local area, the first light transmission area is restored from the target light transmission rate to the first initial light transmission rate by adjusting the temperature of the first light transmission area.
Optionally, the backlight module further comprises a temperature adjusting module for adjusting the temperature of the plurality of light transmissive areas under the control of the processor.
The processor is specifically configured to, when adjusting the temperature of the first light-transmitting region: applying a first-direction current to a temperature adjusting module corresponding to the first light-transmitting area, and triggering the temperature adjusting module to release heat so as to heat the first light-transmitting area; or applying a second direction current to the temperature adjusting module corresponding to the first light transmission area, triggering the temperature adjusting module to absorb heat, and cooling the first light transmission area. Wherein, the first direction current and the second direction current are opposite to each other.
Optionally, the processor is further configured to: after the first light transmission area is changed from the first initial light transmission rate to the target light transmission rate by adjusting the temperature of the first light transmission area, if the touch point moves from the first local area to a second local area in the display device, selecting a second light transmission area corresponding to the second local area from the plurality of light transmission areas; changing the second light transmission area from a second initial light transmission rate to a target light transmission rate by adjusting the temperature of the second light transmission area, so that the brightness of the second local area is reduced to the target brightness, wherein the second initial light transmission rate is higher than the target light transmission rate; restoring the first light-transmitting area from the target light transmittance to the first initial light transmittance by adjusting the temperature of the first light-transmitting area.
The processor related to the embodiment of the invention can be regarded as a control computing center, and the processor comprises hardware structures such as a CPU, a RAM, a Flash, a USB, an RS232, an IO control port and the like without limitation.
The embodiment of the invention also provides another backlight module which comprises a backlight source, a polaroid and a light-transmitting layer arranged between the backlight source and the polaroid, wherein the light-transmitting layer comprises a plurality of light-transmitting areas.
In practical applications, the plurality of light-transmitting areas respectively correspond to different local areas in the display device.
Optionally, the light-transmitting layer is made of a thermochromic material, and the deeper the color of the light-transmitting layer is, the lower the light transmittance of the light-transmitting layer is.
Optionally, the backlight module further comprises a temperature adjusting module for adjusting the temperature of the plurality of light transmissive areas under the control of the processor.
Optionally, the polarizer includes a lower polarizer, and the light transmissive layer is disposed between the backlight source and the lower polarizer. In practical applications, the backlight source may be a backlight plate.
The backlight module can be used for realizing the display device provided in the embodiment shown in fig. 2.
In addition, an embodiment of the present invention provides a non-transitory machine-readable storage medium, on which executable code is stored, and when the executable code is executed by a processor of an electronic device, the processor is caused to execute the control method provided in the foregoing embodiment shown in fig. 2.
The above-described apparatus embodiments are merely illustrative, wherein the various modules illustrated as separate components may or may not be physically separate. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that the embodiments can be implemented by adding necessary general hardware platform, and of course, can also be implemented by a combination of hardware and software. With this understanding in mind, the above-described aspects and certain aspects that make contribution to the present invention may be embodied in the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein (including, but not limited to, disk storage, CD-ROM, optical storage, etc.).
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (11)
1. A control method, comprising:
acquiring a touch instruction sent to display equipment by a user, wherein the touch instruction comprises a touch point of the user to the display equipment;
determining a local area where the touch point is located in the display device;
and reducing the brightness of the local area where the touch point is located.
2. The method according to claim 1, wherein the display device comprises a backlight source, a polarizer, and a light-transmissive layer disposed between the backlight source and the polarizer;
the reducing the brightness of the local area where the touch point is located includes:
selecting a first light transmission region corresponding to a first local region where the touch point is located from the light transmission layer, wherein the light transmission layer comprises a plurality of light transmission regions, and the first light transmission region is one or more of the plurality of light transmission regions;
and adjusting the light transmittance of the first light transmission area to reduce the brightness of the first local area.
3. The method of claim 2, wherein adjusting the light transmittance of the first light-transmitting area to reduce the brightness of the first local area comprises:
changing the first light transmission area from a first initial light transmission rate to a target light transmission rate by adjusting the temperature of the first light transmission area, so that the brightness of the first local area is reduced to a target brightness;
the first initial light transmittance is higher than the target light transmittance, the euphotic layer is made of a thermochromic material, and the deeper the color of the euphotic layer is, the lower the light transmittance of the euphotic layer is.
4. The method of claim 3, wherein after changing the first light-transmitting region from the first initial transmittance to the target transmittance by adjusting the temperature of the first light-transmitting region, further comprising:
and if the touch point moves out of the first local area, the first light transmission area is recovered from the target light transmission rate to the first initial light transmission rate by adjusting the temperature of the first light transmission area.
5. The method of claim 3, wherein after changing the first light-transmitting region from the first initial transmittance to the target transmittance by adjusting the temperature of the first light-transmitting region, further comprising:
if the touch point moves from the first local area to a second local area in the display device, selecting a second light-transmitting area corresponding to the second local area from the plurality of light-transmitting areas;
changing the second light transmission area from a second initial light transmission rate to a target light transmission rate by adjusting the temperature of the second light transmission area, so that the brightness of the second local area is reduced to the target brightness, wherein the second initial light transmission rate is higher than the target light transmission rate;
restoring the first light-transmitting area from the target light transmittance to the first initial light transmittance by adjusting the temperature of the first light-transmitting area.
6. The method of claim 2, wherein the polarizer comprises a lower polarizer, and the light transmissive layer is disposed between the backlight and the lower polarizer.
7. A control apparatus, applied to a display device, comprising:
the acquisition module is used for acquiring a touch instruction sent to the display equipment by a user, wherein the touch instruction comprises a touch point of the user to the display equipment;
the determining module is used for determining a local area where the touch point is located in the display device;
and the control module is used for reducing the brightness of the local area where the touch point is located.
8. A backlight module is characterized in that the backlight module comprises a processor, wherein
The processor is configured to acquire a touch instruction sent by a user to the display device, where the touch instruction includes a touch point of the user to the display device; determining a local area where the touch point is located in the display device; and reducing the brightness of the local area where the touch point is located.
9. The backlight module according to claim 8, wherein the backlight module comprises a backlight source, a polarizer, and a light transmissive layer disposed between the backlight source and the polarizer, the light transmissive layer comprising a plurality of light transmissive regions, wherein
The touch point is located in a first local area in the display device, the light-transmitting layer comprises a first light-transmitting area corresponding to the first local area, and the first light-transmitting area is one or more of the light-transmitting areas;
when the brightness of the local area where the touch point is located is reduced, the processor is specifically configured to: and adjusting the light transmittance of the first light transmission area to reduce the brightness of the first local area.
10. The backlight module as claimed in claim 9, wherein the light transmissive layer is made of a thermochromic material, and the deeper the color of the light transmissive layer, the lower the light transmittance of the light transmissive layer.
11. An electronic device, comprising: a processor and a memory, wherein the memory has stored thereon executable code which, when executed by the processor, causes the processor to perform the control method of any one of claims 1 to 6.
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