System and method for monitoring and displaying ambient temperature of liquid crystal display television

Abstract

The invention relates to a liquid crystal display television technology, and discloses a liquid crystal display television environment temperature monitoring and displaying system and a liquid crystal display television environment temperature monitoring and displaying method, which are used for monitoring and displaying indoor environment temperature under the condition of not increasing television hardware cost and improving the intelligent level and user experience of a television. The system comprises a temperature compensation circuit which is arranged in the liquid crystal display television, comprises a thermistor and is used for outputting corresponding compensation reference voltage according to the change of environment temperature sensed by the thermistor; the SOC chip is connected with the temperature compensation circuit and used for reading the compensation reference voltage output by the temperature compensation circuit and calculating the current environment temperature according to the relation between the environment temperature and the compensation reference voltage; and the display module is connected with the SOC chip and is used for displaying the current environment temperature calculated by the SOC chip on a user interface of the liquid crystal television. The invention is suitable for various liquid crystal televisions with temperature compensation circuits.

Description

Technical Field

[0001] The present invention relates to liquid crystal television technology, and particularly to a liquid crystal television ambient temperature monitoring and display system and method. Background Art

[0002] With the popularization of intelligent electronic products, consumers have higher and higher requirements for smart home devices. As one of the core devices for home entertainment, smart LED televisions have been widely used in home environments. However, although current smart LED televisions have a variety of functions, they have deficiencies in ambient temperature monitoring:

[0003] Like other traditional intelligent devices (such as smartphones or computers), although temperature data can be obtained through installed weather forecast applications, the obtained is outdoor ambient temperature data and cannot accurately reflect the real-time ambient temperature inside the user's home.

[0004] On the other hand, liquid crystal televisions are usually equipped with thermistors for temperature compensation inside. These thermistors are mainly used to maintain the normal operation of the circuit and extend the service life of the television. However, the temperature compensation function of these thermistors has not been fully utilized to provide additional ambient temperature information for users.

[0005] Therefore, designing a liquid crystal television ambient temperature monitoring and display system and method to directly utilize the thermistors equipped in the liquid crystal television to achieve the monitoring of the indoor ambient temperature and display it on the television screen can not only improve the user experience but also increase the practicality and intelligence level of the smart television. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: to propose a liquid crystal television ambient temperature monitoring and display system and method to achieve the monitoring and display of the indoor ambient temperature without increasing the hardware cost of the television, and improve the intelligence level and user experience of the television.

[0007] The technical solution adopted by the present invention to solve the above technical problem is:

[0008] On the one hand, the present invention provides a liquid crystal television ambient temperature monitoring and display system, including:

[0009] A temperature compensation circuit provided in the liquid crystal television and containing a thermistor, which is used to output a corresponding compensation reference voltage according to the change of the ambient temperature sensed by the thermistor;

[0010] An SOC chip connected to the temperature compensation circuit, which is used to read the compensation reference voltage output by the temperature compensation circuit and calculate the current ambient temperature according to the relationship between the ambient temperature and the compensation reference voltage;

[0011] A display module connected to the SOC chip, which is used to display the current ambient temperature calculated by the SOC chip on the user interface of the LCD TV.

[0012] Further, the temperature compensation circuit includes: a first resistor, a second resistor, a third resistor, and a capacitor; the first resistor is a thermistor, the second resistor is connected in parallel with the first resistor and then connected in series with the third resistor; the third resistor is connected to the compensation reference voltage output terminal and grounded through the capacitor.

[0013] Further, the thermistor is a negative temperature coefficient (NTC) thermistor or a positive temperature coefficient (PTC) thermistor.

[0014] Further, the method for obtaining the relationship between the ambient temperature and the compensation reference voltage includes:

[0015] Using an experimental method, measure the compensation reference voltage output by the temperature compensation circuit at known different ambient temperatures respectively; fit the relationship between the ambient temperature and the compensation reference voltage according to the ambient temperature values and the corresponding compensation reference voltage values.

[0016] Further, the temperature compensation circuit is a circuit in the Tcon driving circuit, MIC / Wifi circuit, Bcon driving circuit, Power circuit or Camera internal circuit of the LCD TV.

[0017] On the other hand, the present invention also provides a method for monitoring and displaying the ambient temperature of an LCD TV, including:

[0018] Read the compensation reference voltage output by the temperature compensation circuit through the SOC chip, and calculate the current ambient temperature according to the relationship between the ambient temperature and the compensation reference voltage;

[0019] Display the current ambient temperature calculated by the SOC chip on the user interface of the LCD TV.

[0020] Further, the method for obtaining the relationship between the ambient temperature and the compensation reference voltage includes:

[0021] Using an experimental method, measure the compensation reference voltage output by the temperature compensation circuit at known different ambient temperatures respectively; fit the relationship between the ambient temperature and the compensation reference voltage according to the ambient temperature values and the corresponding compensation reference voltage values.

[0022] Further, displaying the current ambient temperature calculated by the SOC chip on the user interface of the LCD TV includes:

[0023] Display the current ambient temperature on the user interface by one or more of text description, image or animation display, and voice broadcast.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention utilizes the compensated reference voltage value output by the temperature compensation circuit including a thermistor in a liquid crystal television, and based on the relationship between the compensated reference voltage and the temperature reflected by the thermistor, the current ambient temperature is deduced inversely. Since the temperature compensation circuit is an existing circuit in circuit modules such as the Tcon driving circuit, the MIC / Wifi circuit, the Bcon driving circuit, the Power circuit, and the Camera internal circuit in the liquid crystal television, the present invention does not require additional hardware structure design and does not increase the hardware cost. Instead, only software design needs to be carried out in the television program to realize the monitoring and display of the indoor ambient temperature, thereby improving the intelligent level and market competitiveness of the television, and enabling users to directly understand the current indoor ambient temperature condition from the television screen, improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a block diagram of the liquid crystal television ambient temperature monitoring and display system in the present invention;

[0027] Figure 2 is a schematic diagram of the temperature compensation circuit structure in the present invention;

[0028] Figure 3 is a curve graph of the relationship between the output voltage and the temperature of the temperature compensation circuit using a negative temperature coefficient thermistor in the present invention;

[0029] In the figure, the markings: R1 is the first resistor, R2 is the second resistor, R3 is the third resistor, C1 is the capacitor, and V1 is the compensated reference voltage output terminal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present invention aims to provide a liquid crystal television ambient temperature monitoring and display system and method to realize the monitoring and display of the indoor ambient temperature without increasing the television hardware cost, and improve the intelligent level and user experience of the television. Its core idea is: Currently, temperature compensation circuits are designed in circuit modules such as the Tcon driving circuit, the MIC / Wifi circuit, the Bcon driving circuit, the Power circuit, or the Camera internal circuit in the liquid crystal television. The resistance value of the thermistor in the temperature compensation circuit changes with the temperature, causing the compensated reference voltage output by the temperature compensation circuit to also change, thereby realizing basic functions such as maintaining the normal operation of the circuit and ensuring the service life of the television in different ambient temperatures. The present invention is based on the characteristic that the temperature change will bring about a change in the compensated reference voltage. By reading the output voltage of the temperature compensation circuit and combining the pre-determined relationship between the ambient temperature and the compensated reference voltage, the current ambient temperature is deduced inversely and displayed on the television screen.

[0031] In terms of specific implementation, the structure of the ambient temperature monitoring and display system for a liquid crystal television in the present invention is as shown in Figure 1 and includes:

[0032] A temperature compensation circuit containing a thermistor disposed in the liquid crystal television, configured to output a corresponding compensation reference voltage according to the change in the ambient temperature sensed by the thermistor;

[0033] An SOC chip connected to the temperature compensation circuit, configured to read the compensation reference voltage output by the temperature compensation circuit and calculate the current ambient temperature according to the relationship between the ambient temperature and the compensation reference voltage;

[0034] A display module connected to the SOC chip, configured to display the current ambient temperature calculated by the SOC chip on the user interface of the liquid crystal television.

[0035] Among them, an exemplary structure of the temperature compensation circuit is as shown in Figure 2 and includes: a first resistor R1, a second resistor R2, a third resistor R3, and a capacitor C1; the first resistor R1 is a thermistor, the second resistor R2 is connected in parallel with the first resistor R1 and then connected in series with the third resistor R3; the third resistor R3 is connected to the compensation reference voltage output terminal V1 and grounded through the capacitor C1.

[0036] In the above temperature compensation circuit, the first resistor R1 is connected in parallel with the second resistor R2. Connecting the second resistor R2 in parallel can make the temperature response curve of the thermistor more linear and can play a failure protection role; then connecting the third resistor R3 in series to construct this voltage division circuit to adapt the loop voltage to the voltage range that needs to be controlled and output. The third resistor R3 is connected to the compensation reference voltage output terminal V1 and grounded through the capacitor C1. The capacitor C1 plays a role in filtering and anti-interference. The output compensation reference voltage is connected to the IC corresponding to the circuit module where the temperature compensation circuit is located. The output voltage value inside the IC is controlled according to the change of the reference voltage of this temperature compensation network, that is, the final output voltage will change correspondingly according to the temperature compensation slope curve, achieving the effect of temperature compensation.

[0037] Since fixed resistors R2 and R3 are connected in series and parallel in the design of the temperature compensation circuit, within a specific temperature range, the resistance value of this temperature compensation network tends to change linearly. Accordingly, the temperature compensation voltage controlled by the corresponding IC will also have a corresponding temperature-voltage slope curve change. Due to different characteristics of thermistors, the temperature compensation circuit can be divided into two types: PTC (positive temperature coefficient) and NTC (negative temperature coefficient). Taking the temperature compensation circuit using a negative temperature coefficient thermistor as an example, the curve graph of the relationship between the output compensation voltage and temperature is as shown in Figure 3As shown, at temperature T0, the compensation voltage is the standard value U0. When the temperature drops to the low temperature T1, the compensation voltage is slightly increased to U1 after temperature compensation. And when the temperature drops to the low temperature T2, the compensation voltage is further compensated and increased to U2. Similarly, if the temperature rises to the high temperature T3, the compensation voltage is adjusted and decreased to U3.

[0038] Based on the characteristics of the compensation voltage output by the temperature compensation circuit changing with temperature within a specific temperature range as described above, the present invention measures the output voltage of the temperature compensation circuit corresponding to each known temperature point within the applicable temperature range by means of experiments. Then, according to the measurement results, the relationship between the ambient temperature and the compensation reference voltage is determined by fitting. This relationship and the calculation logic are written into the program of the TV SOC. Thus, based on the compensation reference voltage read by the SOC from the temperature compensation circuit, the current ambient temperature is directly calculated in combination with the relationship between the ambient temperature and the compensation reference voltage. And through the software UI design, the ambient temperature obtained in real time is placed in the main interface UI of the TV. For example, the current ambient temperature can be displayed on the user interface in one or more ways such as text description, image or animation display, and voice broadcast, so that the user can intuitively obtain the real-time ambient temperature information.

[0039] It should be noted that the temperature compensation circuit has been actually applied to various circuit modules in the liquid crystal TV, including but not limited to the Tcon driving circuit, the MIC / Wifi circuit, the Bcon driving circuit, the Power circuit, and the Camera internal circuit. Different types of temperature compensation circuits mainly based on PTC / NTC thermistors are designed. When implementing the solution, any module with a PTC / NTC thermistor temperature compensation circuit can be arbitrarily selected according to the actual situation to form an ambient temperature monitoring and display system with the TV's SOC chip and the display module, which has a certain universality.

[0040] Although the embodiments of the present invention have been described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and all are within the protection scope of the present invention.

Claims

1. A liquid crystal TV ambient temperature monitoring and display system, characterized in that, Including: A temperature compensation circuit provided in a liquid crystal TV and including a thermistor, which is used to output a corresponding compensation reference voltage according to the change of the ambient temperature sensed by the thermistor; An SOC chip connected to the temperature compensation circuit, which is used to read the compensation reference voltage output by the temperature compensation circuit and calculate the current ambient temperature according to the relationship between the ambient temperature and the compensation reference voltage; A display module connected to the SOC chip, which is used to display the current ambient temperature calculated by the SOC chip on the user interface of the liquid crystal TV.

2. The liquid crystal TV ambient temperature monitoring and display system according to claim 1, wherein The temperature compensation circuit includes: a first resistor, a second resistor, a third resistor and a capacitor; the first resistor is a thermistor, the second resistor is connected in parallel with the first resistor and then connected in series with the third resistor; the third resistor is connected to the compensation reference voltage output terminal and grounded through the capacitor.

3. The liquid crystal TV ambient temperature monitoring and display system according to claim 2, wherein The thermistor is a negative temperature coefficient thermistor or a positive temperature coefficient thermistor.

4. The liquid crystal TV ambient temperature monitoring and display system according to claim 1, wherein The obtaining method of the relationship between the ambient temperature and the compensation reference voltage includes: Adopting an experimental method to measure the compensation reference voltages output by the temperature compensation circuit at known different ambient temperatures respectively; fitting the relationship between the ambient temperature and the compensation reference voltage according to the ambient temperature values and the corresponding compensation reference voltage values.

5. The liquid crystal TV ambient temperature monitoring and display system according to any one of claims 1-4, wherein The temperature compensation circuit is a circuit in the Tcon driving circuit, MIC / Wifi circuit, Bcon driving circuit, Power circuit or Camera internal circuit of the liquid crystal TV.

6. A method for monitoring and displaying the ambient temperature of a liquid crystal television, which is applied to the liquid crystal television ambient temperature monitoring and display system according to any one of claims 1-5, and is characterized in that, The method includes: Reading the compensation reference voltage output by the temperature compensation circuit through the SOC chip and calculating the current ambient temperature according to the relationship between the ambient temperature and the compensation reference voltage; Displaying the current ambient temperature calculated by the SOC chip on the user interface of the liquid crystal TV.

7. The liquid crystal TV ambient temperature monitoring and display method according to claim 6, wherein The obtaining method of the relationship between the ambient temperature and the compensation reference voltage includes: Adopting an experimental method to measure the compensation reference voltages output by the temperature compensation circuit at known different ambient temperatures respectively; fitting the relationship between the ambient temperature and the compensation reference voltage according to the ambient temperature values and the corresponding compensation reference voltage values.

8. The liquid crystal TV ambient temperature monitoring and display method according to claim 6, wherein Displaying the current ambient temperature calculated by the SOC chip on the user interface of the liquid crystal TV includes: Displaying the current ambient temperature on the user interface by one or more of text description, image or animation display, and voice broadcast.

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