Display and display device

Abstract

The invention discloses a displayer and a display device.The displayer comprises a display screen, a backlight structure, a condensing device and a driving circuit, the backlight structure and the display screen are arranged in a stacked mode, and the edge of the backlight structure protrudes out of the periphery of the display screen; the condensing device is located between the inner side of the edge of the backlight structure and the periphery of the display screen; the driving circuit comprises a signal collector and a controller, the signal collector is electrically connected with the controller, the controller is electrically connected with the condensing device, the signal collector is used for collecting the humidity value of the environment where the displayer is located, and the controller is used for adjusting the intensity of condensed water vapor of the condensing device according to the humidity value. And the display can dynamically adjust the condensation intensity of the condenser according to the real-time change of the environment humidity. Therefore, water vapor is prevented from invading the edge of the display screen and even condensing on the central display area of the display screen or the surface of an internal optical lens, and the definition and color rendition degree of pictures are ensured.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display and display device. Background Technology

[0002] In traditional monitor manufacturing, LCD screens are typically assembled using frame adhesive. However, this method has significant drawbacks: the adhesive cannot completely and effectively isolate external moisture, and its sealing performance is limited by the aging characteristics of the adhesive. When the monitor operates in a high-humidity environment, moisture can easily penetrate into the glass panel, causing corrosion of the GDL signal lines near the adhesive. Simultaneously, moisture can also increase the size and severity of existing black spots within the panel, severely impacting the monitor's lifespan and display quality. Summary of the Invention

[0003] This application provides a display and display device that can effectively prevent moisture from entering the interior of the display screen.

[0004] In a first aspect, this application provides a display, comprising: Display screen; The backlight structure is stacked with the display screen, and the edge of the backlight structure protrudes beyond the outer periphery of the display screen. A condensation device is located between the inner edge of the backlight structure and the outer periphery of the display screen. The drive circuit includes a signal acquisition unit and a controller. The signal acquisition unit and the controller are electrically connected, and the controller is electrically connected to the condensing device. The signal acquisition unit is used to acquire the humidity value of the environment in which the display is located, and the controller is used to adjust the condensing intensity of the condensing device according to the humidity value.

[0005] In some feasible implementations, the side of the condensation device away from the backlight structure is attached to the outer periphery of the display screen, and / or the side of the condensation device away from the display screen is attached to the inner edge of the backlight structure.

[0006] In some feasible implementations, the display also includes a buffer layer located between the condenser and the outer periphery of the display screen.

[0007] In some feasible implementations, the backlight structure has two water collection tanks on the side facing the display screen. On the projection of the display screen onto the backlight structure, the two water collection tanks are located on both sides of the display screen, and the projection of the condensation device onto the backlight structure is at least partially located in the water collection tanks.

[0008] In some feasible implementations, there is a gap between the water collection tank and the condensation device.

[0009] In some feasible implementations, the drive circuit also includes a processor connected between the signal acquisition unit and the controller. The processor is used to convert the humidity value acquired by the signal acquisition unit into a voltage signal, and the voltage signal is positively correlated with the humidity value.

[0010] In some feasible implementations, the driving circuit includes a reference voltage terminal, and the processor includes a converter, a first operational amplifier, a second operational amplifier, a third operational amplifier, and a fourth operational amplifier. The converter has a signal input terminal and a signal output terminal. The first operational amplifier has a first non-inverting terminal, a first inverting terminal, and a first output terminal. The second operational amplifier has a second non-inverting terminal, a second inverting terminal, and a second output terminal. The third operational amplifier has a third non-inverting terminal, a third inverting terminal, and a third output terminal. The fourth operational amplifier has a fourth non-inverting terminal, a fourth inverting terminal, and a fourth output terminal. The signal input terminal is electrically connected to the signal acquisition unit, the signal output terminal is connected to the first non-inverting terminal, the first inverting terminal is connected to the reference voltage terminal, the first output terminal is connected to the second inverting terminal, the second non-inverting terminal is grounded, the second output terminal is connected to the third inverting terminal, the third non-inverting terminal is grounded, the third output terminal is connected to the fourth non-inverting terminal, the fourth inverting terminal is grounded, and the fourth output terminal is electrically connected to the controller.

[0011] In some feasible implementations, the drive circuit also includes a comparator connected between the fourth output terminal and the controller. The fourth output terminal is used to output a voltage signal to the comparator. The comparator or the controller has a first threshold voltage and a second threshold voltage preset. The controller has a first driving voltage and a second driving voltage preset. When the voltage signal is greater than the first threshold voltage and less than the second threshold voltage, the controller inputs the first driving voltage to the condensing device. When the voltage signal is greater than the second threshold voltage, the controller inputs the second driving voltage to the condensing device. The second driving voltage is greater than the first driving voltage.

[0012] In some feasible implementations, the driving circuit includes a voltage input terminal, and the controller includes a first resistor, a second resistor, a transistor, a diode, and a field-effect transistor. The first resistor is connected in series between the fourth output terminal and the base of the transistor, the second resistor is connected in series between the collector of the transistor and the gate of the field-effect transistor, the cathode of the diode is connected to the emitter of the transistor, the anode of the diode is grounded, the drain of the field-effect transistor is connected to the voltage input terminal, and the condenser is connected between the source of the field-effect transistor and ground.

[0013] In a second aspect, this application provides a display device, including a power supply module and a display as described in the first aspect.

[0014] The condenser is located between the outer perimeter of the display screen and the edge of the backlight structure, at the edge of the non-visible display area. By setting up a signal acquisition unit and controller, and forming a closed-loop control with the condenser, the display can dynamically adjust the condenser's condensation intensity according to real-time changes in ambient humidity. The area where the condenser is located becomes the lowest-temperature area inside the display. According to the principle of water vapor condensation, water vapor will preferentially condense at the lowest temperature edge, thus preventing water vapor from penetrating the edge of the display screen or even condensing in the central display area or on the surface of the internal optical lenses, ensuring image clarity and color reproduction. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0016] Figure 1 This is a schematic diagram of the structure of the display provided in this application; Figure 2 A structural schematic diagram of another state of the display provided in this application; Figure 3 for Figure 1 A schematic diagram of the display's structure in the thickness direction; Figure 4 for Figure 1 Another structural diagram of the display in the thickness direction is shown. Figure 5 This is a schematic diagram illustrating the principle of graded adjustment of the drive circuit in this application. Figure 6 for Figure 5 A schematic diagram of the driving circuit shown. Figure 7 This is a schematic diagram of the principle of stepless adjustment of the drive circuit in this application. Figure 8 for Figure 7 A schematic diagram of the driving circuit shown. Figure 9 A schematic diagram of the display device provided in this application.

[0017] Attached image captions: 100 - Display screen, 200 - Backlight structure, 300 - Cooling device, 400 - Drive circuit, 410 - Signal acquisition unit, 420 - Controller, 421 - First resistor, 422 - Second resistor, 423 - Transistor, 424 - Diode, 425 - Field-effect transistor, 430 - Processor, 431 - Converter, 432 - First operational amplifier, 4321 - First non-inverting input, 4322 - First inverting input, 4323 - First output terminal, 433 - Second operational amplifier, 4331 - Second non-inverting input, 4332 - Second inverting input, 4333 - Second output terminal, 434 - Third operational amplifier, 4341 - Third non-inverting input, 4342 - Third inverting input, 4343 - Third output terminal, 435 - Fourth operational amplifier, 4351 - Fourth non-inverting input, 4352 - Fourth inverting input, 4353 - ... Fourth output terminal, 436-Voltage input terminal, 437-Ground terminal, 438-Reference voltage terminal, 440-Comparator, 441-Fifth operational amplifier, 442-Sixth operational amplifier, 443-Seventh operational amplifier, 444-Eighth operational amplifier, 461-Third resistor, 462-Fourth resistor, 463-Fifth resistor, 464-Sixth resistor, 465-Seventh resistor, 466-Eighth resistor, 467-Ninth resistor, 468-Tenth resistor, 469-Eleventh resistor, 470-Twelfth resistor, 471-Thirteenth resistor, 472-Fourteenth resistor, 473-Fifteenth resistor, 474-Sixteenth resistor, 475-First pull-up resistor, 476-Second pull-up resistor, 500-Circuit board, 510-Power input pad, 520-Ground pad, 600-Water collection tank, 700-Voltage regulator; 1000 - Display device, 1001 - Display, 1002 - Power supply module. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the application will be described in further detail below with reference to the accompanying drawings.

[0019] Please see Figures 1 to 8 The display 1001 provided in this application includes a display screen 100, a backlight structure 200, a condensation device 300, and a driving circuit 400. The backlight structure 200 is stacked with the display screen 100, and the edge of the backlight structure 200 protrudes beyond the outer periphery of the display screen 100. The condensation device 300 is located between the inner edge of the backlight structure 200 and the outer periphery of the display screen 100. The driving circuit 400 includes a signal acquisition unit 410 and a controller 420. The signal acquisition unit 410 and the controller 420 are electrically connected, and the controller 420 is electrically connected to the condensation device 300. The signal acquisition unit 410 is used to acquire the humidity value of the environment in which the display 1001 is located, and the controller 420 is used to adjust the intensity of water vapor condensation by the condensation device 300 according to the humidity value.

[0020] The display screen 100 is a glass panel used to display image information, such as a liquid crystal display (LCD). The edge of the backlight structure 200 protrudes beyond the outer periphery of the display screen 100. The length and width of the backlight structure 200 are greater than those of the display screen 100, and the edge of the backlight structure 200 extends towards the outer periphery of the display screen 100 to form a recessed area accommodating the display screen 100. The backlight structure 200 is located on the backlight side of the display screen 100 and is used to provide a surface light source for the display screen 100.

[0021] The condensation device 300 is located on the outer periphery of the display screen 100 and the inner edge of the backlight structure 200. The condensation device 300 is a device used to reduce the local temperature to cause water vapor condensation, such as a condenser plate, a semiconductor cooler, a flexible thin-film cooling device, or a fluid circulation cooling pipe. The signal acquisition device 410 is a sensor used to sense the operating environment status of the display 1001, such as a humidity sensor, a temperature and humidity integrated sensor, or a dew point sensor. It can be installed inside the casing of the display 1001, at the rear heat dissipation holes, or exposed on the bezel of the display 1001.

[0022] The drive circuit 400 is located inside the display 1001. For an example, please refer to [link to example]. Figure 1 and Figure 2 The driving circuit 400 is disposed on the circuit board 500 of the display 1001. The circuit board 500 is foldable relative to the backlight structure 200. The circuit board 500 has a set of power supply pads, including a power input pad 510 and a ground pad 520. This set of pads is located in the area where the circuit board 500 needs to be bent during assembly, or on the connecting tabs extending from the circuit board 500. A metal connection module is embedded on the back side of the backlight structure 200 corresponding to the positions of the circuit board 500 pads. The metal connection module can be a metal spring, metal contact, conductive post, or metallized via embedded in the backplate or frame. The metal connection module is electrically connected to the electrodes of the condensation device 300 through connecting lines embedded inside the backlight structure 200, such as enameled wire or metal busbar. During the assembly of the display 1001, the circuit board 500 is folded towards the back of the backlight structure 200. When the circuit board 500 is folded to a predetermined position and secured, for example by adhesive bonding or snap-fit ​​locking, the power input pad 510 and ground pad 520 on the circuit board 500 form a physical compression contact with the exposed metal connection module on the back of the backlight structure 200. At this time, the current path is: from the power supply of the circuit board 500 to the power input / ground pad 520, then to the metal connection module of the backlight structure 200, and then through the connecting wire to the condensation device 300, thereby realizing a closed-loop circuit without the need for soldering wires.

[0023] The condenser 300 is located between the outer periphery of the display screen 100 and the edge of the backlight structure 200, i.e., at the edge of the non-display visible area. By setting up a signal acquisition unit 410 and a controller 420, and forming a closed-loop control with the condenser 300, the display 1001 can dynamically adjust the condensation intensity of the condenser according to the real-time changes in ambient humidity. The area where the condenser 300 is located becomes the area with the lowest internal temperature of the display 1001. According to the principle of water vapor condensation, water vapor will preferentially condense at the edge with the lowest temperature, thereby preventing water vapor from penetrating the edge of the display screen 100 or even condensing in the central display area or on the surface of the internal optical lenses, ensuring the clarity and color reproduction of the image. Compared with passive physical anti-condensation, this application can activate the condenser 300 in advance when the humidity has not yet reached the dew point or has just reached the dew point, or reduce the cooling intensity to save energy when the humidity decreases. This active control mechanism significantly improves the display reliability in environments with high humidity and large temperature differences, effectively preventing fogging inside the screen or condensation on the outside.

[0024] In the embodiments of this application, the condensation device 300 is installed within the space formed by the inner edge of the backlight structure 200 and the outer periphery of the display screen 100. To achieve optimal condensation efficiency and structural stability, the installation and fitting methods of the condensation device 300 include, but are not limited to, the following embodiments: Please see Figure 3 The side of the condensing device 300 away from the backlight structure 200 is attached to the outer periphery of the display screen 100, that is, the inner cooling surface of the condensing device 300 is attached to the outer peripheral sidewall of the display screen 100. In this embodiment, the cooling surface of the condensing device 300 is directly in close contact with the glass sidewall of the display screen 100. To reduce thermal resistance, a thermally conductive silicone grease or thermally conductive adhesive with high thermal conductivity can be filled between the two. A small gap can be reserved between the side of the condensing device 300 away from the display screen 100 and the inner edge of the backlight structure 200, or an elastic buffer layer can be provided.

[0025] Please see Figure 4 The side of the condensation device 300 away from the backlight structure 200 is attached to the outer periphery of the display screen 100, and the side of the condensation device 300 away from the display screen 100 is attached to the inner edge of the backlight structure 200. That is, the inner side of the condensation device 300 is attached to the outer periphery of the display screen 100, and the outer side of the condensation device 300 is attached to the inner edge of the backlight structure 200. This structure applies a pre-tightening force to the edge of the backlight structure 200, pressing the condensation device 300 tightly against the outer periphery of the display screen 100.

[0026] By directly attaching the condensation device 300 to the outer periphery of the display screen 100, heat conduction occurs directly between the condensation device 300 and the display screen 100. This direct heat conduction path allows the temperature at the edge of the display screen 100 to drop rapidly and precisely below the dew point. Compared to air cooling or indirect cooling, direct contact significantly improves the condensation rate, ensuring that when ambient humidity increases sharply, water vapor condenses at the screen edge immediately, preventing it from intruding from the edge of the display screen 100 or even spreading into the visible display area. This avoids corrosion damage to the internal components of the display screen 100 by water vapor and eliminates the risk of fogging in the center of the screen, ensuring the clarity of the displayed image. The backlight structure 200 is usually the main supporting structure in the display module, and its mechanical strength is much higher than that of the brittle glass display screen 100. By fixing the backlight structure 200 together with the inner edge of the backlight structure 200 and the outer periphery of the display screen 100, and using the backlight structure 200 as a mounting base, the connection reliability of the condensation device 300 can be significantly improved. Especially in applications involving vibration, such as vehicle-mounted or outdoor displays, this fixing method can effectively prevent the condenser 300 from becoming loose due to vibration or impact, which could cause damage to the display screen 100.

[0027] In some feasible implementations, the display 1001 further includes a buffer adhesive layer located between the condensation device 300 and the outer periphery of the display screen 100. The buffer adhesive layer is made of an elastic insulating material, such as rubber, polymer foam, or a double-sided adhesive to composite material. In this embodiment, the buffer adhesive layer is a frame adhesive, which can be foam tape, solid adhesive strip, or an elastomer formed by curing liquid adhesive.

[0028] A buffer adhesive layer tightly wraps around or adheres to the outer periphery of the display screen 100, with the condensation device 300 located on the side of the buffer adhesive layer facing away from the display screen 100. When the condensation device 300 is a flexible device, such as a flexible thin-film cooling device, it can conform to the arc-shaped structure of both edges of the display screen 100, allowing for better adhesion between the condensation device 300 and the outer periphery of the display screen 100. By selecting a flexible adhesive material with good thermal conductivity, such as thermally conductive silicone or thermally conductive graphite sheets, the adhesive layer can squeeze out air, allowing the cooling energy of the condensation device 300 to be efficiently and evenly conducted to the edge of the display screen 100, greatly improving the efficiency of cooling and condensation. The buffer adhesive layer itself has a certain thermal resistance. By adjusting the thickness and thermal conductivity of the adhesive layer, the cooling depth at the edge of the display screen 100 can be finely adjusted. This prevents excessive penetration of cooling energy into other areas of the backlight structure 200, avoiding unnecessary heat loss, while ensuring that condensation occurs precisely in the edge area wrapped by the adhesive layer, preventing condensate from spreading into the screen interior.

[0029] Please see Figure 3 and Figure 4The backlight structure 200 has two water collection tanks 600 on the side facing the display screen 100. On the projection of the display screen 100 onto the backlight structure 200, the two water collection tanks 600 are located on both sides of the display screen 100. The projection of the condensation device 300 onto the backlight structure 200 is at least partially located in the water collection tanks 600. The two water collection tanks 600 are located on the left and right sides (or top and bottom sides) of the display screen 100, and extend parallel to the two short sides (or two long sides) of the display screen 100. The projection of the condensation device 300 onto the backlight structure 200 is at least partially located in the water collection tanks 600, for example, as... Figure 3 As shown, the outer periphery of the display screen 100 is arc-shaped, the condensation device 300 is completely fitted to the outer periphery of the display screen 100, the location of the water collection tank 600 covers the dripping area of ​​the condensed water on the condensation device 300, and the bottom of the water collection tank 600 forms the collection area of ​​the condensed water; or, as Figure 4 As shown, when the outer periphery of the display screen 100 is linear, the condensing device 300 can be partially embedded in the water collection tank 600, with the other part protruding from the tank opening and contacting the outer periphery of the display screen 100. The water condensed by the condensing device 300 drips straight into the water collection tank 600 under the action of gravity.

[0030] During use, the airflow generated by air convection or heat exchange often circulates along both sides of the display screen 100 (such as the left and right sides or the top and bottom sides). By placing the water collection tanks 600 on both sides of the display screen 100, regardless of which side of the display screen 100 generates condensation, or when the display screen 1001 is placed at different angles, the water droplets will flow to the water collection tanks 600 on both sides under the influence of gravity, ensuring comprehensive collection. For example, when the two water collection tanks 600 are respectively located on the left and right sides of the display screen 100, condensation can drip into the water collection tanks 600 under gravity when the display screen 1001 is placed flat, and water in the water collection tanks 600 can drain out of the display screen 1001 under gravity when the display screen 1001 is placed upright.

[0031] There is a gap between the water collection tank 600 and the condensation unit 300. For example, see [link to example]. Figure 3 or Figure 4 After the condensing device 300 is embedded in the water collection tank 600, along the thickness direction of the display 1001, the bottom of the condensing device 300 is higher than the bottom surface of the water collection tank 600, and there is a gap between the bottom of the condensing device 300 and the bottom surface of the water collection tank 600; or, as shown in the figure, the water collection tank 600 is recessed in the backlight structure 200, the condensing device 300 is not located in the water collection tank 600, and there are gaps between the condensing device 300 and the bottom and side surfaces of the water collection tank 600.

[0032] The gap is filled with still air or is a semi-open space communicating with the outside of the display 1001. This gap physically separates the outer surface of the condenser 300 from the inner wall of the water collection tank 600, preventing direct contact and significantly reducing the risk of moisture contacting live parts, thus improving the overall electrical safety level. By maintaining the gap, condensate from the condenser 300 can more easily drip into the water collection tank 600. Furthermore, the gap cuts off the direct heat conduction path from the condenser 300 to the water collection tank 600, forcing the cooling capacity of the condenser 300 to dissipate primarily through the air above or the side of the display screen 100. This allows the cooling capacity to be more concentrated on the edge of the display screen 100, rather than being wasted on cooling the water collection tank 600.

[0033] Please see Figure 5 and Figure 7 The drive circuit 400 also includes a processor 430, which is connected between the signal acquisition unit 410 and the controller 420. The processor 430 converts the humidity value collected by the signal acquisition unit 410 into a voltage signal, and the voltage signal is positively correlated with the humidity value. The signal acquisition unit 410 periodically collects the humidity value of the environment in which the display 1001 is located. This humidity value can be directly provided by a sensor in digital signal form or read through an analog interface. The processor 430 internally maps and converts the received humidity value into a corresponding voltage signal through a preset circuit or algorithm program. The magnitude of the voltage signal is positively correlated with the magnitude of the humidity value; that is, when the ambient humidity increases, the amplitude of the voltage signal output by the processor 430 increases accordingly. Conversely, when the ambient humidity decreases, the amplitude of the voltage signal output by the processor 430 decreases accordingly.

[0034] The controller 420 can directly determine the humidity level of the environment in which the display 1001 is located based on the voltage signal transmitted from the processor 430, and thus output the corresponding cooling power to control the condensing intensity of the condensing device 300. For example, the stronger the voltage signal, the greater the driving voltage output by the controller 420 to the condensing device 300, and the stronger the condensing intensity of the condensing device 300. This conversion method also allows for continuously varying voltage signals, enabling the control of the condensing device 300 to be both binary control and precise, continuous power adjustment based on humidity levels. This avoids the energy consumption and noise caused by frequent start-stop of the condensing device 300, and improves the stability of the system.

[0035] Please see Figure 6The driving circuit 400 includes a voltage input terminal 436, a ground terminal 437, and a reference voltage terminal 438. The processor 430 includes a converter 431, a first operational amplifier 432, a second operational amplifier 433, a third operational amplifier 434, and a fourth operational amplifier 435. The converter 431 has a signal input terminal and a signal output terminal. The first operational amplifier 432 has a first non-inverting input 4321, a first inverting input 4322, and a first output terminal 4323. The second operational amplifier 433 has a second non-inverting input 4331, a second inverting input 4332, and a second output terminal 4333. The third operational amplifier 434 has a third non-inverting input 4341, a third inverting input 4342, and a third output terminal 4323. The third output terminal 4343 and the fourth operational amplifier 435 have a fourth non-inverting input 4351, a fourth inverting input 4352 and a fourth output terminal 4353; the signal input terminal is electrically connected to the signal acquisition unit 410, the signal output terminal is connected to the first non-inverting input 4321, the first inverting input 4322 is connected to the reference voltage terminal 438, the first output terminal 4323 is connected to the second inverting input 4332, the second non-inverting input 4331 is grounded, the second output terminal 4333 is connected to the third inverting input 4342, the third non-inverting input 4341 is grounded, the third output terminal 4343 is connected to the fourth non-inverting input 4351, the fourth inverting input 4352 is grounded, and the fourth output terminal 4353 is electrically connected to the controller 420.

[0036] In this embodiment, voltage input terminal 436 is the main power supply interface of the drive circuit 400, electrically connected to the power input pad 510, used to provide operating voltage for active devices in the entire drive circuit 400, such as the processor 430, and simultaneously provide drive current for the condenser 300. Ground terminal 437 is the common reference potential point of the drive circuit 400, electrically connected to the ground pad 520, used to provide the same reference potential for all circuits in the drive circuit 400, forming a signal loop and current return path. Reference voltage terminal 438 is the high-precision reference voltage input interface of the drive circuit 400, electrically connected to the output terminal of the reference voltage source, used to provide a stable, low-drift DC voltage reference point.

[0037] The converter 431 is a microcontroller. The data pin of the signal acquisition unit 410 is connected to the SDA pin of the microcontroller. A first pull-up resistor 475 is externally connected to the SDA signal line. One end of the first pull-up resistor 475 is connected to the SDA signal line, and the other end is connected to the voltage input terminal 436. The clock pin of the signal acquisition unit 410 is connected to the SCL pin of the microcontroller. A second pull-up resistor 476 is externally connected to the SCL signal line. One end of the second pull-up resistor 476 is connected to the SCL signal line, and the other end is connected to the voltage input terminal 436.

[0038] The microcontroller integrates a timer, and the signal acquisition unit 410 can periodically acquire the humidity value of the environment surrounding the display 1001 according to the internal timer of the microcontroller, for example, acquiring the humidity value once every 100 milliseconds. The microcontroller reads the ambient humidity value detected by the signal acquisition unit 410 through an interface. The humidity value RH ranges from 0% to 100%. The microcontroller converts the read humidity value into an initial analog voltage signal through the internally integrated digital-to-analog converter module. The initial analog voltage Vt is then conditioned by a four-stage operational amplifier circuit consisting of a first operational amplifier 432, a second operational amplifier 433, a third operational amplifier 434, and a fourth operational amplifier 435 to achieve impedance matching, level shifting, and linear amplification.

[0039] First-stage operational amplifier: The initial analog voltage Vt flows into the first non-inverting input 4321 of the first operational amplifier 432 through the fourth resistor 462, and the reference voltage is input to the first inverting input 4322 of the first operational amplifier 432 through the third resistor 461. Based on the virtual short and virtual open characteristics of the operational amplifier, the fourth resistor 462 and the sixth resistor 464 form a voltage divider circuit, and the third resistor 461 and the fifth resistor 463 form a feedback network. Solving the simultaneous equations, the formula for calculating the output voltage Va of the first output terminal 4323 of the first operational amplifier 432 is:

[0040] In the above formula, V a Vt is the output voltage of the first output terminal 4323 of the first operational amplifier 432, and Vt is the initial analog voltage output by the microcontroller. R3 is the reference voltage, R4 is the third resistor (461), R5 is the fourth resistor (462), R6 is the fifth resistor (463), and R6 is the sixth resistor (464).

[0041] The second stage operational amplifier: The output voltage Va of the first output terminal 4323 is input to the second inverting input 4332 of the second operational amplifier 433 through the seventh resistor 465. This stage circuit is an inverting amplifier structure. According to the principle of virtual short continuity, the current flowing through the seventh resistor 465 is equal to the current flowing through the feedback eighth resistor 466. The formula for calculating the output voltage Vb of the second output terminal 4333 of the second operational amplifier 433 is:

[0042] In the above formula, Vb is the output voltage of the second output terminal 4333 of the second operational amplifier 433. a R7 is the output voltage of the first output terminal 4323 of the first operational amplifier 432, R8 is the seventh resistor 465, and R8 is the eighth resistor 466.

[0043] The third operational amplifier stage: The output voltage Vb of the second output terminal 4333 is input to the third inverting input 4342 of the third operational amplifier 434 through the ninth resistor 467. The output voltage Vb of the second output terminal 4333 is connected to the third output terminal 4343 of the third operational amplifier 434 through the tenth resistor 468. This stage circuit is an inverting amplifier structure. The output voltage Vc of the third output terminal 4343 of the third operational amplifier 434 is calculated as follows:

[0044] In the above formula, Vc is the output voltage of the third output terminal 4343 of the third operational amplifier 434, Vb is the output voltage of the second output terminal 4333 of the second operational amplifier 433, R9 is the ninth resistor 467, and R10 is the tenth resistor 468.

[0045] Fourth-stage operational amplifier: The output voltage Vc of the third output terminal 4343 is output to the fourth non-inverting input 4351 of the fourth operational amplifier 435 through the twelfth resistor 470. The reference voltage Ve is connected to the voltage divider circuit containing the fourth non-inverting input 4351 of the fourth operational amplifier 435 through the eleventh resistor 469. The fourth operational amplifier 435 is in the form of a voltage follower or adder. The voltage at the fourth non-inverting input 4351 of the fourth operational amplifier 435 is the weighted average of Vc and Ve. The fourth inverting input 4352 is connected to the fourth output terminal 4353 through the voltage divider network formed by the thirteenth resistor 471 and the fourteenth resistor 472. According to the virtual short principle, the output voltage of the fourth output terminal 4353, that is, the output voltage Vd of the entire processor 430, is calculated by solving the simultaneous equations as follows:

[0046] In the above formula, Vd is the output voltage of the fourth output terminal 4353, which is also the output voltage of the entire processor 430; Vc is the output voltage of the third output terminal 4343; Ve is the reference voltage; R11 is the eleventh resistor 469; R12 is the twelfth resistor 470; R13 is the thirteenth resistor 471; and R14 is the fourteenth resistor 472.

[0047] At this point, the initial analog voltage Vt is converted into a voltage signal Vd that has a specific linear relationship with the humidity value through the complex calculation of a four-stage operational amplifier circuit, and then sent to the subsequent stage, such as the controller 420.

[0048] Compared to directly using the initial analog voltage Vt signal output by the microcontroller, this scheme introduces a reference voltage Ve through the first operational amplifier 432 for subtraction / differential operations, effectively eliminating errors caused by sensor temperature drift or system zero-point drift, ensuring signal accuracy. Through the inverting proportional amplification of the second operational amplifier 433 and the third operational amplifier 434, the signal amplification factor can be flexibly adjusted by changing the resistor ratio. This allows the circuit to adapt to sensors with different sensitivities or subsequent controllers 420 with different voltage input ranges. The fourth operational amplifier 435 performs a weighted summation of the output voltage Vc at the third output terminal and the system reference voltage Ve, adjusting the signal level to a suitable voltage range for the subsequent comparator circuit (i.e., level shifting). Simultaneously, utilizing the high input impedance and low output impedance characteristics of the operational amplifiers, the synthesized signal is buffered and isolated, providing a stable, low-impedance drive voltage for the subsequent circuits.

[0049] For some feasible implementation methods, please refer to Figure 6 The drive circuit 400 also includes a voltage regulator 700. The input terminal of the voltage regulator 700 is connected to the power input terminal through a fifteenth resistor 473. A sixteenth resistor 474 is connected between the output terminal of the voltage regulator 700 and the ground terminal 437. The voltage regulator outputs a reference voltage Ve, and the formula for calculating Ve is:

[0050] In the above formula, Ve is the reference voltage, and V f R15 is the fifteenth resistor with a voltage of 473, and R16 is the sixteenth resistor with a voltage of 474.

[0051] In this application, the condensing device 300 can be adjusted in stages or steplessly.

[0052] During tiered adjustment, the controller 420 is a logic controller 420, such as a microcontroller. Please refer to [link / reference]. Figure 5 and Figure 6 The drive circuit 400 also includes a comparator 440, which is connected between the fourth output terminal 4353 and the controller 420. The fourth output terminal 4353 is used to output a voltage signal to the comparator 440. The comparator 440 or the controller 420 is preset with a first threshold voltage and a second threshold voltage. The controller 420 is preset with a first driving voltage and a second driving voltage. When the voltage signal is greater than the first threshold voltage and less than the second threshold voltage, the controller 420 inputs the first driving voltage to the condensing device 300. When the voltage signal is greater than the second threshold voltage, the controller 420 inputs the second driving voltage to the condensing device 300.

[0053] The first and second threshold voltages are related to the ambient humidity level of the display 1001. For example, when the voltage signal is greater than or equal to the first threshold voltage and less than the second threshold voltage, the ambient humidity is determined to be at a moderate level. At this time, the controller 420 inputs a first driving voltage to the condensing device 300. This first driving voltage is usually low, used to maintain the condensing device 300 operating at low power, which saves energy and prevents condensation. When the voltage signal is greater than or equal to the second threshold voltage, the ambient humidity is determined to be at a high level or close to its peak. At this time, the controller 420 inputs a second driving voltage to the condensing device 300. This second driving voltage is higher than the first driving voltage, used to drive the condensing device 300 to operate at full power to quickly reduce humidity.

[0054] The comparator 440 or controller 420 may also have multiple preset threshold voltages, and the corresponding controller 420 can output different drive voltages to the condensing device 300. For example, as shown in the figure, the comparator 440 includes a fifth operational amplifier 441, a sixth operational amplifier 442, a seventh operational amplifier 443, and an eighth operational amplifier 444. The non-inverting inputs of the fifth operational amplifier 441, the sixth operational amplifier 442, the seventh operational amplifier 443, and the eighth operational amplifier 444 are all connected to the fourth output terminal 4353 to receive the output voltage Vd of the fourth output terminal 4353. The inverting inputs of the fifth operational amplifier 441, the sixth operational amplifier 442, the seventh operational amplifier 443, and the eighth operational amplifier 444 are respectively connected to four threshold voltages Vr1, Vr2, Vr3, and Vr4. The four threshold voltages Vr1, Vr2, Vr3, and Vr4 correspond to four humidity levels: low, medium, high, and peak, respectively. The outputs of the fifth operational amplifier 441, the sixth operational amplifier 442, the seventh operational amplifier 443, and the eighth operational amplifier 444 are all connected to the controller 420.

[0055] When the humidity level is low, the fifth operational amplifier 441 is turned on and outputs a high level 1. The sixth operational amplifier 442, the seventh operational amplifier 443 and the eighth operational amplifier 444 output a low level 0. At this time, the controller 420 receives an address bit level of 1000 and outputs a low-level drive voltage to the condensing device 300. When the humidity level is medium, the fifth operational amplifier 441 and the sixth operational amplifier 442 are turned on and output a high level 1. The seventh operational amplifier 443 and the eighth operational amplifier 444 output a low level 0. At this time, the controller 420 receives an address bit level of 1100 and outputs a medium-level drive voltage to the condenser 300. When the humidity level is high, the fifth operational amplifier 441, the sixth operational amplifier 442 and the seventh operational amplifier 443 output a high level 1, and the eighth operational amplifier 444 outputs a low level 0. At this time, the controller 420 receives the address bit level as 1110 and outputs a high-level drive voltage to the condensing device 300. When the humidity level is at its peak, the fifth operational amplifier 441, the sixth operational amplifier 442, the seventh operational amplifier 443, and the eighth operational amplifier 444 are all turned on, outputting a high level of 1. At this time, the controller 420 receives an address bit level of 1111 and outputs the peak level drive voltage to the condenser 300.

[0056] Combination Figure 6 The following are examples (the specific values ​​can be adjusted according to actual needs to control humidity): When R3=R4=R5=R6=R11=R12=R13=R14=10k, R8=R9=R10=1k, R7=20k, R15=1.2k, and R16=6k, the voltage regulator 700 has a built-in reference voltage source V. f =2.5V, conversion relationship: 1V for every 20% humidity, for example, 3V for 60% humidity, 3.5V for 70% humidity, etc.

[0057] Based on the above values, the voltage regulator 700 outputs a reference voltage Ve = 3V. The initial analog voltage Vt is converted by the processor 430 into a voltage signal Vd = 0.1 × (RH - RH0) / 2 + 3, which is linearly related to the humidity value, where RH0 = 60%, RH is the current humidity value, and RH0 is the reference humidity value. That is, Vd = 0.1 × (Vt - 3) / 2 + 3. The correspondence between the humidity level and the voltage signal Vd is shown in Table 1. Table 1

[0058] Taking low humidity as an example, Table 1 is explained as follows: When the ambient humidity RH is between 61% and 70%, the boundary humidity is 60%, and the corresponding initial analog voltage Vt after conversion is 3V. After processing by the processor 430, the final output voltage signal is 3V. If the voltage signal output by the processor 430 is greater than 3V but less than 3.025V, the display 1001 is considered to be in a low humidity environment.

[0059] Table 2 shows the correspondence between the four threshold voltages Vr1, Vr2, Vr3, and Vr4 corresponding to the fifth operational amplifier 441, the sixth operational amplifier 442, the seventh operational amplifier 443, and the eighth operational amplifier 444, and the humidity level. Taking a low humidity level as an example, Table 2 is explained as follows: The threshold voltage corresponding to the fifth operational amplifier 441 is 3V. When the humidity RH is greater than 60%, the voltage signal output by the processor 430 is greater than 3V, and the fifth operational amplifier 441 is turned on.

[0060] Table 2

[0061] The correspondence between the controller 420 and the drive voltage output to the condenser 300 according to different humidity levels is shown in Table 3: Table 3

[0062] Taking low humidity level as an example, Table 2 is explained as follows: At this time, the fifth operational amplifier 441 is turned on, outputting a high level of 1; the sixth operational amplifier 442, the seventh operational amplifier 443, and the eighth operational amplifier 444 output a low level of 0. At this time, the controller 420 receives an address bit level of 1000 and outputs a low-level drive voltage of 3.3V to the condenser 300. It should be noted that the receive address 1 in Table 3 is... Figure 6 X0 in the controller 420 shown, and receive address 2 in Table 3 are... Figure 6 X1 in the controller 420 shown, and the receive address 3 in Table 3 are... Figure 6 X2 in the controller 420 shown, and the receive address 4 in Table 3 are... Figure 6 X4 in the controller 420 shown.

[0063] The controller 420 outputs different drive voltages to the condenser 300. When the output drive voltage is 0V, the condenser 300 does not work; when the output is 3.3V, the condenser 300 operates at low intensity; when the output is 5.0V, the condenser 300 operates at medium intensity; when the output is 7.5V, the condenser 300 operates at high intensity; and when the output is 10.0V, the condenser 300 operates at peak intensity. The different intensities of the condenser 300 indicate differences in the condensation and waterproofing effect, thus achieving graded adjustment of the condensation and waterproofing intensity of the condenser 300 based on the ambient humidity level.

[0064] For stepless adjustment, please refer to [link / reference]. Figure 7 and Figure 8The controller 420 includes a first resistor 421, a second resistor 422, a transistor 423, a diode 424, and a field-effect transistor 425. The first resistor 421 is connected in series between the fourth output terminal 4353 and the base of the transistor 423. The second resistor 422 is connected in series between the collector of the transistor 423 and the gate of the field-effect transistor 425. The cathode of the diode 424 is connected to the emitter of the transistor 423, and the anode of the diode 424 is grounded. The drain of the field-effect transistor 425 is connected to the voltage input terminal 436. The condenser 300 is connected between the source of the field-effect transistor 425 and the ground terminal 437. In this embodiment, the diode 424 is a Zener diode 424, and the field-effect transistor 425 is an N-type field-effect transistor 425.

[0065] The output voltage Vd of the fourth output terminal 4353 reaches the base of transistor 423 through the first resistor 421. A Zener diode 424 is connected to the emitter of the transistor. This Zener diode 424 utilizes its reverse breakdown characteristic to stably lock the emitter voltage of transistor 423 to its regulated value VD1. Based on this, the base-on threshold voltage Uo of transistor 423 is clamped to a fixed value. The formula for calculating Uo is:

[0066] In the above formula, Uo is the base turn-on threshold voltage of transistor 423, VD1 is the emitter stable voltage of transistor 423, and VBE is the emitter junction voltage drop of transistor 423 (approximately 0.7V for silicon transistors and approximately 0.3V for germanium transistors).

[0067] Since the voltage difference across the first resistor 421 is Vd-Uo, the formula for calculating the base current Ib flowing through the first resistor 421 is:

[0068] In the above formula, Ib is the base current of transistor 423, Vd is the output voltage through the fourth output terminal 4353, Uo is the base turn-on threshold voltage of transistor 423, and R1 is the first resistor 421.

[0069] Transistor 423 operates in the amplification region, and its collector current Ic is controlled by the base current Ib. The formula for calculating Ic is:

[0070] In the above formula, Ic is the collector current of transistor 423, Ib is the base current of transistor 423, and β is the transistor amplification factor.

[0071] The collector current of the triode 423 flows through the second resistor 422 connected to the gate of the field-effect transistor 425, generating a voltage drop across the second resistor 422, thereby forming the gate drive voltage Vg of the field-effect transistor 425. The calculation formula for the gate drive voltage Vg is as follows:

[0072] In the above formula, Vg is the gate drive voltage of the field-effect transistor 425, Ic is the collector current of the triode 423, β is the amplification factor of the triode, Vd is the output voltage through the fourth output terminal 4353, Uo is the base conduction threshold voltage of the triode 423, R1 is the first resistor 421, and R2 is the second resistor 422. Since Uo, β, R1, and R2 are all fixed parameters, the gate drive voltage Vg of the field-effect transistor 425 is proportional to the voltage difference (Vd - Uo) across the first resistor 421. Also, because Uo is a fixed value, the gate drive voltage Vg is proportional to the voltage signal Vd input to the controller 420. And the voltage signal Vd is positively correlated with the ambient humidity value. When the ambient humidity is higher, the Vd output by the processor 430 through conversion and calculation to the controller 420 is larger, and then the gate drive voltage of the field-effect transistor 425 is also larger.

[0073] The condensation device 300 is connected between the source of the field-effect transistor 425 and the ground terminal 437, forming a source follower structure. The supply voltage of the condensation device 300 is the source-to-ground voltage, and its value is approximately equal to the product of the drain current Id and the equivalent resistance RL of the condensation device 300. When the gate drive voltage Vg increases, the conduction degree of the field-effect transistor 425 deepens, and the drain current Id flowing through the field-effect transistor 425 increases accordingly. The increase in the drain current Id directly leads to an increase in the voltage drop across the condensation device 300, that is, the obtained supply power increases. Therefore, as Vd increases, the supply voltage of the condensation device 300 increases synchronously, and the condensation intensity increases. When Vd < Uo, the triode 423 cannot obtain sufficient base bias and is in the cut-off state, resulting in the gate drive voltage of the field-effect transistor 425 being 0, the field-effect transistor 425 is turned off, and the condensation device 300 does not work. When Vd ≥ Uo, the triode 423 conducts and enters the amplification region. As the ambient humidity continues to increase, the Vd value increases synchronously, the gate drive voltage Vg increases, and thus the power of the condensation device 300 is continuously adjusted to achieve stepless adjustment of the condensation intensity of the condensation device 300.

[0074] This embodiment utilizes the linear amplification regions of transistor 423 and field-effect transistor 425 to achieve continuously variable power control. Every minute change in the ambient humidity of the display 1001 is translated into a corresponding change in the cooling power of the condenser 300, eliminating the jerky feeling when switching the operating levels of the condenser 300, resulting in smoother and more precise control. Since the condenser 300 is connected to the source of the field-effect transistor 425, it is a typical source follower. When the temperature of the condenser 300 increases, causing a change in its resistance or an increase in current, the source voltage increases, which in turn reduces the gate drive voltage, thereby suppressing further increases in current. This built-in negative feedback mechanism has excellent temperature stability and current limiting characteristics, preventing the condenser 300 from overheating and burning out.

[0075] Please see Figure 9 This application provides a display device 1000, including a power supply module 1002 and a power supply module 1003. Figure 1 The display 1001 is shown. The power supply module 1002 provides operating voltage to the display 1001. The drive circuit 400 within the display 1001 can dynamically and precisely adjust the condensation intensity of the condensation device 300 in stages or steplessly according to the actual changes in humidity of the display device 1001 or its surrounding environment. By introducing a closed-loop humidity detection and condensation control mechanism at the system level, the display device 1000 can proactively cope with complex and changing environmental humidity, especially during the rainy season, in bathrooms, outdoors, or in spaces with large temperature differences. This device effectively prevents condensation from occurring inside the display 1001 or on its back panel, thereby avoiding problems such as short circuits, component corrosion, or decreased display quality caused by condensation, significantly improving the survivability and long-term reliability of the display device 1000 in harsh environments. Furthermore, by integrating the power supply module 1002 with the condensation-enabled display 1001, this application achieves coordinated operation of the power supply and control logic. The reasonable circuit layout, such as the folding design of the circuit board 500, not only solves the electrical connection problem, but also facilitates the utilization of the internal space and the design of the heat dissipation channel, so that the display device 1000 can maintain the trend of thinness and lightness while still having excellent thermal management capabilities.

[0076] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0077] Furthermore, the use of terms such as "first," "second," etc., in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0078] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0079] Furthermore, the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.

[0080] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display, characterized in that, include: Display screen; A backlight structure is stacked with the display screen, and the edge of the backlight structure protrudes beyond the outer periphery of the display screen; A condensation device is located between the inner edge of the backlight structure and the outer periphery of the display screen. The driving circuit includes a signal acquisition unit and a controller. The signal acquisition unit and the controller are electrically connected, and the controller is electrically connected to the condensing device. The signal acquisition unit is used to acquire the humidity value of the environment in which the display is located, and the controller is used to adjust the condensing intensity of the condensing device according to the humidity value.

2. The display as claimed in claim 1, characterized in that, The side of the condensation device away from the backlight structure is attached to the outer periphery of the display screen, and / or the side of the condensation device away from the display screen is attached to the inner edge of the backlight structure.

3. The display as claimed in claim 2, characterized in that, The display also includes a buffer adhesive layer located between the condensation device and the outer periphery of the display screen.

4. The display according to any one of claims 1-3, characterized in that, The backlight structure has two water collection tanks on the side facing the display screen. On the projection of the display screen onto the backlight structure, the two water collection tanks are located on both sides of the display screen. The projection of the condensation device onto the backlight structure is at least partially located in the water collection tanks.

5. The display as claimed in claim 4, characterized in that, There is a gap between the water collection tank and the condensation device.

6. The display as claimed in claim 1, characterized in that, The driving circuit also includes a processor connected between the signal collector and the controller. The processor is used to convert the humidity value collected by the signal collector into a voltage signal, and the voltage signal is positively correlated with the humidity value.

7. The display as claimed in claim 6, characterized in that, The driving circuit includes a reference voltage terminal, and the processor includes a converter, a first operational amplifier, a second operational amplifier, a third operational amplifier, and a fourth operational amplifier. The converter has a signal input terminal and a signal output terminal. The first operational amplifier has a first non-inverting terminal, a first inverting terminal, and a first output terminal. The second operational amplifier has a second non-inverting terminal, a second inverting terminal, and a second output terminal. The third operational amplifier has a third non-inverting terminal, a third inverting terminal, and a third output terminal. The fourth operational amplifier has a fourth non-inverting terminal, a fourth inverting terminal, and a fourth output terminal. The signal input terminal is electrically connected to the signal acquisition unit, the signal output terminal is connected to the first non-inverting terminal, the first inverting terminal is connected to the reference voltage terminal, the first output terminal is connected to the second inverting terminal, the second non-inverting terminal is grounded, the second output terminal is connected to the third inverting terminal, the third non-inverting terminal is grounded, the third output terminal is connected to the fourth non-inverting terminal, the fourth inverting terminal is grounded, and the fourth output terminal is electrically connected to the controller.

8. The display as claimed in claim 7, characterized in that, The driving circuit further includes a comparator connected between the fourth output terminal and the controller. The fourth output terminal is used to output a voltage signal to the comparator. The comparator or controller has a first threshold voltage and a second threshold voltage preset. The controller has a first driving voltage and a second driving voltage preset. When the voltage signal is greater than the first threshold voltage and less than the second threshold voltage, the controller inputs the first driving voltage to the condensing device. When the voltage signal is greater than the second threshold voltage, the controller inputs the second driving voltage to the condensing device. The second driving voltage is greater than the first driving voltage.

9. The display as claimed in claim 7, characterized in that, The driving circuit includes a voltage input terminal, and the controller includes a first resistor, a second resistor, a transistor, a diode, and a field-effect transistor. The first resistor is connected in series between the fourth output terminal and the base of the transistor. The second resistor is connected in series between the collector of the transistor and the gate of the field-effect transistor. The cathode of the diode is connected to the emitter of the transistor, and the anode of the diode is grounded. The drain of the field-effect transistor is connected to the voltage input terminal, and the condensation device is connected between the source of the field-effect transistor and the ground terminal.

10. A display device, characterized in that, It includes a power supply module and a display as described in any one of claims 1-9.

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