CN104010208B - A kind of LCD TV with infrared positioning function and its infrared positioning method - Google Patents

Abstract

The invention discloses a liquid crystal television with an infrared positioning function and an infrared positioning method thereof, which comprises the steps of: through each infrared light-sensitive element arranged horizontally/vertically on the edge of the liquid crystal display screen, the infrared light source signal projected on the liquid crystal display screen Carry out current detection, and make one-to-one statistics on the current detected by these infrared photosensitive elements; compare the current detected by each infrared photosensitive element in the horizontal/vertical direction, and determine the horizontal/vertical infrared photosensitive element that detects the largest current Components; calculate the distance from the horizontal/vertical infrared photosensitive element that detects the largest current to the origin, and generate the corresponding position coordinates; feed back the position coordinates to the processor of the LCD screen, and the processor will display it on the LCD screen in the form of a cursor The projection position of the infrared light source is displayed on the screen; the LCD TV has an infrared positioning function, and the interactive entertainment function effect between the user and the TV is enhanced.

Description

A liquid crystal television with infrared positioning function and its infrared positioning method

technical field

The invention relates to the field of liquid crystal display manufacturing, in particular to a liquid crystal television with an infrared positioning function and an infrared positioning method thereof.

Background technique

At present, there are many positioning technologies on the market that are a certain distance away from the LCD screen, that is, the user can control the content on the LCD screen within a certain distance from the LCD screen, which is similar to the game operation of cutting fruit in the air, but this Not only the cost of new technology products cannot be controlled, but also the structure is relatively complex, and the corresponding effect is not satisfactory. It can be said that in the field of liquid crystal screen sensing, this technology is still close to the initial development stage, and there is still room for further development.

Therefore, the prior art still needs to be improved and developed.

Contents of the invention

In view of the above-mentioned deficiencies in the prior art, the present invention provides a liquid crystal television with an infrared positioning function and an infrared positioning method thereof, aiming at solving the problems of development cost and complex structure of the technology.

The adopted technical scheme is as follows:

An infrared positioning method for a liquid crystal display, comprising the steps of:

The infrared light source signals projected onto the liquid crystal display are detected by each infrared photosensitive element horizontally/vertically arranged on the edge of the liquid crystal display, and the currents detected by these infrared photosensitive elements are counted one by one;

Comparing the magnitude of the current detected by each infrared photosensitive element in the horizontal/vertical direction, and determining the horizontal/vertical infrared photosensitive element that detects the largest current;

Calculate the distance from the horizontal/vertical infrared sensor that detects the largest current to the origin, and generate the corresponding position coordinates;

The position coordinates are fed back to the processor of the liquid crystal display, and the processor displays the projected position of the infrared light source on the liquid crystal display in the form of a cursor.

In the infrared positioning method for a liquid crystal display, the step of comparing the magnitude of the current detected by each infrared photosensitive element in the horizontal/vertical direction, and determining the horizontal/vertical infrared photosensitive element that detects the largest current is specifically: :

The current detected by each infrared sensor in the horizontal/vertical direction is amplified by the operational amplifier and converted into a voltage output;

Perform analog-to-digital conversion on the voltage parameters of the voltage output to generate binary numbers, and temporarily store the converted binary numbers;

The temporarily stored binary numbers are formed into a horizontal/vertical array, and the maximum value in the horizontal/vertical array is found out through judgment and comparison, so as to determine the horizontal/vertical infrared photosensitive element that detects the largest current.

In the infrared positioning method for liquid crystal display screens, the steps of calculating the distance from the horizontal/vertical infrared photosensitive element with the largest detected current to the origin, and generating corresponding position coordinates are specifically:

Calculate the distance from the horizontal infrared photosensitive element that detects the maximum current to the origin to determine the X-direction coordinate value of the infrared light source on the liquid crystal display screen, and express it as Xm;

Calculate the distance from the vertical infrared photosensitive element that detects the largest current to the origin to determine the Y-direction coordinate value of the infrared light source on the liquid crystal display screen, and express it as Yn;

Generate the corresponding position coordinates (Xm, Yn) from the calculated Xm and Yn,

Wherein, m represents the number of horizontal infrared photosensitive elements in the horizontal direction, and n represents the number of vertical infrared photosensitive elements in the vertical direction.

In the infrared positioning method for liquid crystal display screens, the formulas for calculating the distance from the horizontal/vertical infrared photosensitive element with the largest detected current to the origin are respectively:

Xm=D×m,

Yn=D×n,

Wherein, D represents the separation distance between adjacent horizontal/vertical infrared photosensitive elements.

In the infrared positioning method for liquid crystal display screens, when only the infrared photosensitive element in one horizontal or vertical direction detects the current of the infrared light source, it is determined that the infrared light source is an invalid position signal.

A liquid crystal television with an infrared positioning function, comprising:

The infrared detection module is used to detect the current of the infrared light source signal projected on the liquid crystal display through the infrared photosensitive elements arranged horizontally/vertically on the edge of the liquid crystal display, and to detect the current detected by these infrared photosensitive elements One-to-one statistics;

The position calculation module is used to compare the current detected by each infrared photosensitive element in the horizontal/vertical direction, and determine the horizontal/vertical infrared photosensitive element with the largest detected current; it is also used to calculate the horizontal/vertical infrared photosensitive element with the largest detected current The distance from the component to the origin, and generate the corresponding position coordinates;

The processor is used to feed back the position coordinates generated by the position calculation module to the liquid crystal display for internal processing, and display the projected position of the infrared light source on the liquid crystal display in the form of a cursor.

The LCD TV with infrared positioning function, wherein the infrared detection module is an infrared receiving and scanning sensor, and the infrared receiving and scanning sensor includes:

The first infrared receiving tube arranged horizontally on the upper or lower side of the liquid crystal display, and the second infrared receiving tube vertically arranged on the left or right side of the liquid crystal display, and the infrared photosensitive elements are evenly spaced on the first infrared receiving tube and the second infrared receiving tube.

The LCD TV with infrared positioning function, wherein, the position calculation module is an arithmetic unit, and the arithmetic unit also includes a formula for calculating the distance from the horizontal/vertical infrared photosensitive element that detects the largest current to the origin:

Xm=D×m,

Yn=D×n,

Among them, Xm represents the distance from the horizontal infrared photosensitive element that detects the largest current to the origin, Yn represents the distance from the vertical infrared photosensitive element that detects the largest current to the origin, m represents the number of horizontal infrared photosensitive elements in the horizontal direction, and n represents The number of vertical infrared photosensitive elements in the vertical direction, D represents the distance between adjacent horizontal/vertical infrared photosensitive elements.

In the LCD TV with infrared positioning function, the processor is a TV chip.

The LCD TV with infrared positioning function, wherein, the display area of the LCD display is provided with an infrared filter diaphragm for filtering out visible light;

A metal frame is arranged outside the edge of the liquid crystal display to prevent the position of the infrared light source from overflowing the liquid crystal display.

Beneficial effects of the present invention:

Compared with the prior art, the present invention provides an LCD TV with an infrared positioning function and its infrared positioning method, so that the LCD TV has the function of infrared positioning, and the user can cut fruit, Games that require direction positioning, such as airplanes, enhance the functional effect of interactive entertainment between the user and the TV. Not only that, the technical principle adopted by the present invention is simple and easy to realize, and at the same time, the cost is low.

Description of drawings

Fig. 1 is the implementation flow chart of embodiment 1 of the infrared positioning method for liquid crystal display screen of the present invention;

Fig. 2 is a flow chart of specific steps of S200 in Fig. 1;

Fig. 3 is a flowchart of specific steps of S300 in Fig. 1;

Fig. 4 is a logic flow chart of Embodiment 2 of the infrared positioning method for liquid crystal display screens of the present invention;

Fig. 5 is the modular block diagram of the LCD TV with infrared positioning function of the present invention;

Fig. 6 is the structural representation of the infrared receiving module in the LCD TV with infrared positioning function of the present invention;

Fig. 7 is a schematic diagram of the principle of an infrared receiving module in a liquid crystal television having an infrared positioning function according to the present invention;

FIG. 8 is a schematic structural view of a specific embodiment of a liquid crystal television with an infrared positioning function according to the present invention;

Fig. 9 is a structural schematic diagram of an improvement measure for preventing the position of the infrared light source from overflowing the TV screen in the LCD TV with infrared positioning function of the present invention.

detailed description

The present invention provides an infrared positioning method for liquid crystal display screens and liquid crystal televisions. In order to make the purpose, technical solutions and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Embodiment one:

Please refer to FIG. 1 . FIG. 1 is an implementation flow chart of Embodiment 1 of an infrared positioning method for a liquid crystal display according to the present invention.

As shown in Figure 1, the described infrared positioning method for liquid crystal display, it comprises steps:

Step S100, through the infrared photosensitive elements arranged horizontally/vertically on the edge of the liquid crystal display screen, respectively detect the current of the infrared light source signal projected on the liquid crystal display screen, and make a one-to-one correspondence between the currents detected by these infrared photosensitive elements registration.

Wherein, the current data collected in the horizontal direction and the vertical direction are independent of each other, and correspondingly, the horizontal direction and the vertical direction are also completely separated when the current magnitude is compared subsequently.

In this embodiment, before step S100, it should also include an operation step for the user to emit an infrared light source to the display area on the liquid crystal display, specifically:

The user can hold an infrared emitter similar in structure to an ordinary TV remote control but capable of emitting a specific infrared light source. The position pointed by the user is determined on the LCD screen, that is, the positioning function, so as to realize the infrared positioning function.

After step S100 is completed, go to step S200.

Step S200 , comparing the magnitudes of currents detected by each infrared photosensitive element in the horizontal/vertical direction, and determining the horizontal/vertical infrared photosensitive element that detects the largest current.

As shown in FIG. 2, FIG. 2 is a flow chart of the specific steps of S200 in FIG. 1, and the step S200 specifically includes:

Step S210, the current detected by each infrared photosensitive element in the horizontal/vertical direction is amplified by the operational amplifier and converted into a voltage output;

Step S220, performing analog-to-digital conversion on the voltage parameter of the voltage output to generate a binary number, and temporarily storing the converted binary number;

Step S230, form the temporarily stored binary numbers into a horizontal/vertical array, and find out the maximum value in the horizontal/vertical array through judgment and comparison, so as to determine the horizontal/vertical infrared photosensitive element that detects the largest current.

The above steps S210, S220 and S230 are to process the current values collected by each photosensitive element in the horizontal/vertical direction in step S100, so as to determine the horizontal/vertical infrared photosensitive element with the largest detected current. The measured current value is converted into an array through a series of data, in order to adapt to the application of the single-chip microcomputer, and facilitate the processing of relevant data by the single-chip microcomputer (the voice recognition of the single-chip microcomputer is a binary number), and the maximum current detected by the single-chip computer is calculated. Horizontal/vertical infrared sensor.

Further, enter step S300.

Step S300, calculating the distance from the horizontal/vertical infrared photosensitive element with the largest detected current to the origin, and generating corresponding position coordinates.

As shown in FIG. 3 , FIG. 3 is a flowchart of specific steps of S300 in FIG. 1 , and the step S300 specifically includes:

Step S310, calculating the distance from the horizontal infrared photosensitive element that detects the largest current to the origin, so as to determine the X-direction coordinate value of the infrared light source on the liquid crystal display screen, and express it as Xm;

Step S320, calculating the distance from the vertical infrared photosensitive element with the largest detected current to the origin, so as to determine the Y-axis coordinate value of the infrared light source on the liquid crystal display screen, and express it as Yn;

Step S330, generating corresponding position coordinates (Xm, Yn) from the calculated Xm and Yn,

Wherein, m represents the number of horizontal infrared photosensitive elements in the horizontal direction, and n represents the number of vertical infrared photosensitive elements in the vertical direction.

Further, in the step 300, the formulas for calculating the distance from the horizontal/vertical infrared sensor with the largest current to the origin are respectively:

Xm=D×m,

Yn=D×n,

Wherein, D represents the separation distance between adjacent horizontal/vertical infrared photosensitive elements.

Taking the determination of the X-direction coordinate value of the infrared light source in the horizontal direction as an example, the principle of this embodiment is further described in detail as follows:

When the effective infrared light source is in front of the screen, the infrared photosensitive elements (such as infrared diodes or triodes, preferably silicon photosensitive diodes in this embodiment) arranged uniformly in the horizontal direction receive the light of the infrared light source respectively, but due to the infrared The distance between the photosensitive element and the infrared light source is different, so that the current intensities detected by the infrared photosensitive elements from x1 to xm are all different. The closer to the light source, the greater the current. According to geometric principles, the shortest distance from a point to a line is the point when perpendicular to the line.

Then it can be determined that when the current detected by the infrared photosensitive element xm is the largest, the position of the infrared photosensitive element xm is the vertical point of the infrared light source perpendicular to the X axis. According to the principle of the geometric coordinate system, the The distance from the infrared photosensitive element xm to the origin is the X-direction coordinate value Xm of the infrared light source. Therefore, the X-direction coordinate value of the infrared light source can be obtained through the above calculation formula of Xm=D×m.

The Y-coordinate value Yn of the infrared light source can be obtained in the same way.

After the position coordinates of the infrared light source are determined in step S300, go to step S400.

In step S400, the position coordinates are fed back to the processor of the liquid crystal display, and the processor displays the projected position of the infrared light source on the liquid crystal display in the form of a cursor.

Embodiment two:

Please refer to Fig. 4, Fig. 4 is a logic flow chart of Embodiment 2 of the infrared positioning method for liquid crystal display screens of the present invention, and further explains the present invention in conjunction with specific embodiments:

As shown in Figure 4, the method embodiment includes:

In step a, the TV is turned on and in the state of waiting to receive a position signal, and then enters step b;

Step b, there is an infrared light source in front of the TV, and then enter step c or step f;

Step c, when the infrared light source is directly in front of the TV screen, then enter step d;

In step d, distance coordinates (Xm, Yn) are given for both horizontal and vertical photosensitive reception, and then enter step e;

Step e, the TV chip receives the position signal and processes and displays the corresponding action on the screen, which is completed;

Generate another branch step f in step b;

Step f, when the infrared light source is on the side of the TV screen, then enter step g;

Step g, provide Xm or Yn on one side horizontally or vertically, and then enter step h;

Step h, invalid position signal, return to step b again.

In step a, the TV is turned on and is in the state of receiving the position signal, and there is step b. There is an infrared light source in front of the TV. At this time, there are two situations. Situation 1: step c, when the infrared light source is directly in front of the TV screen, then step d Both the horizontal and vertical sensors send out the position coordinates (Xm, Yn), and continue to step e. The TV chip makes a corresponding display according to the position signal; case two: step f, the infrared light source is on the side of the screen, and step g is unilaterally given horizontally or vertically. Xm or Yn position signal, the TV chip determines that the position information is invalid in step h, and judges again.

That is to say, when only the infrared photosensitive element in the horizontal or vertical direction detects the current intensity of the infrared light source, it is determined that the infrared light source is an invalid position signal.

Based on the above method embodiment, the present invention also provides a liquid crystal television with an infrared positioning function,

Please refer to FIG. 5 . FIG. 5 is a block diagram of a LCD TV with an infrared positioning function according to the present invention.

As shown in Figure 5, the LCD TV includes:

The infrared detection module 510 is used to respectively detect the current of the infrared light source signal projected on the liquid crystal display through each infrared photosensitive element arranged horizontally/vertically on the edge of the liquid crystal display, and to detect the current detected by these infrared photosensitive elements Perform one-to-one corresponding statistics, specifically as described in step S100 above.

As shown in FIG. 6, FIG. 6 is a schematic structural diagram of an infrared receiving module in a liquid crystal television with an infrared positioning function according to the present invention. The infrared detection module 510 is an infrared receiving scanning sensor, which includes:

The first infrared receiving tube 511 horizontally arranged on the upper or lower side of the liquid crystal display, and the second infrared receiving tube 512 vertically arranged on the left or right side of the liquid crystal display, the infrared photosensitive element (i.e. The horizontal infrared photosensitive elements 600a and the vertical infrared photosensitive elements 600b) are evenly spaced on the first infrared receiving tube 511 and the second infrared receiving tube 512 (the specific number of infrared photosensitive elements is determined by the size of the display screen).

As shown in Figure 7, Figure 7 is a schematic diagram of the principle of the infrared receiving module of the LCD TV with infrared positioning function of the present invention, x1~xm represent the horizontal infrared photosensitive elements in the horizontal direction, and y1~yn represent the horizontal infrared photosensitive elements in the vertical direction Components, (Xm, Yn) represent the position coordinates of the infrared light source projected onto the screen, D represents the distance between adjacent horizontal/vertical infrared photosensitive elements, L1~Lm represent the infrared light source to each horizontal infrared photosensitive element in the horizontal direction L1~Ln represent the distance from the infrared light source to each vertical infrared photosensitive element in the vertical direction. The distance from each infrared photosensitive element to the infrared light source is different, and the detected current intensity is different.

The position operation module 520 is used to compare the current magnitudes detected by each infrared photosensitive element in the horizontal/vertical direction, and determine the horizontal/vertical infrared photosensitive element that detects the largest current; it is also used to calculate the horizontal/vertical infrared photosensitive element that detects the largest current. The vertical distance from the infrared photosensitive element to the origin, and generate the corresponding position coordinates, as described in the above step S200 and step S300.

Wherein, the position calculation module 520 is an arithmetic unit (that is, a single-chip microcomputer), and the arithmetic unit also includes a formula for calculating the distance from the horizontal/vertical infrared sensor with the largest current detected to the origin:

Xm=D×m,

Yn=D×n,

Among them, Xm represents the distance from the horizontal infrared photosensitive element that detects the largest current to the origin, Yn represents the distance from the vertical infrared photosensitive element that detects the largest current to the origin, m represents the number of horizontal infrared photosensitive elements in the horizontal direction, and n represents The number of vertical infrared photosensitive elements in the vertical direction, D represents the distance between adjacent horizontal/vertical infrared photosensitive elements.

The processor 530 is configured to feed back the position coordinates generated by the position calculation module to the liquid crystal display for internal processing, and display the projected position of the infrared light source on the liquid crystal display in the form of a cursor, specifically as described in step 400 above.

Wherein, the processor 530 is a TV chip, and correspondingly, the arithmetic unit can be integrated on the TV chip.

Please refer to FIG. 8 . FIG. 8 is a schematic structural diagram of a specific embodiment of a liquid crystal television with an infrared positioning function according to the present invention.

As shown in Figure 8, the LCD TV includes a TV main body 700, and an infrared receiving scanning sensor 710 arranged on the side of the TV main body 700. The infrared receiving scanning sensor 710 is provided with silicon photodiodes (including horizontal silicon photodiodes 711a and The vertical silicon photodiode 711b) is provided with an arithmetic unit and a processor (not shown in the figure) inside the TV body 700 .

The position signal of the infrared light source is determined by the infrared photosensitive element, and the projected position coordinates of the infrared light source on the TV screen are calculated, and the TV processor displays the action of the infrared light source on the screen in the form of a cursor.

The present invention can support customers to use the remote controller to play games that require direction positioning such as cutting fruit and airplanes, which greatly increases the user's interactive experience.

As shown in Figure 9, Figure 9 is a structural schematic diagram of the improvement measures for preventing the position of the infrared light source from overflowing the TV screen in the LCD TV with infrared positioning function of the present invention. When the infrared light source is not directly in front of the screen, in order to prevent misjudgment A metal frame 800 is set outside the edge of the TV, and the metal frame 800 is made of an infrared-impermeable metal material to prevent the position of the infrared light source from overflowing the liquid crystal display screen. When the infrared light source is outside the screen, the infrared receiving scanning sensor 710 in the horizontal or vertical direction only has a value in one direction, and the other does not receive a value, so the TV chip can determine it as an invalid position signal.

Furthermore, an infrared filter film 900 is arranged in the display area of the liquid crystal display screen to filter out visible light and only allow infrared light of about 940nm from the infrared light source to pass through.

In this embodiment, the infrared photosensitive element is preferably a silicon photosensitive diode, whose peak response is about 80-100 μm, and is most sensitive to infrared light with a wavelength of 940 nm, so the infrared emitting light source also uses a 940 nm infrared light source.

To sum up, the LCD TV with infrared positioning function and its infrared positioning method provided by the present invention enable the LCD TV to have the function of infrared positioning. Games that require direction positioning, such as games, enhance the interactive entertainment function between the user and the TV. Not only that, the technical principle adopted by the present invention is simple and easy to realize, and at the same time, the cost is low.

It should be understood that the application of the present invention is not limited to the above examples, and those skilled in the art can make improvements or transformations according to the above descriptions, and all these improvements and transformations should belong to the protection scope of the appended claims of the present invention.

Claims (7)

1. an infrared positioning method for liquid crystal display, is characterized in that, comprises steps: The infrared light source signals projected onto the liquid crystal display are detected by the infrared photosensitive elements arranged horizontally and vertically on the edge of the liquid crystal display, and the currents detected by these infrared photosensitive elements are counted one by one; Comparing the magnitude of the current detected by each infrared photosensitive element in the horizontal and vertical directions, and determining the horizontal and vertical infrared photosensitive element that detects the largest current; Calculate the distance from the horizontal and vertical infrared photosensitive element with the largest current detected to the origin, and generate the corresponding position coordinates; The position coordinates are fed back to the processor of the liquid crystal display, and the processor displays the projected position of the infrared light source on the liquid crystal display in the form of a cursor; The steps of calculating the distance from the horizontal and vertical infrared photosensitive elements with the largest current to the origin and generating the corresponding position coordinates are as follows: Calculate the distance from the horizontal infrared photosensitive element that detects the maximum current to the origin to determine the X-direction coordinate value of the infrared light source on the liquid crystal display screen, and express it as Xm; Calculate the distance from the vertical infrared photosensitive element that detects the largest current to the origin to determine the Y-direction coordinate value of the infrared light source on the liquid crystal display screen, and express it as Yn; Generate the corresponding position coordinates (Xm, Yn) from the calculated Xm and Yn, Among them, m represents the number of horizontal infrared photosensitive elements in the horizontal direction, and n represents the number of vertical infrared photosensitive elements in the vertical direction; The formulas for calculating the distances from the horizontal and vertical infrared photosensitive elements with the largest detected current to the origin are respectively: Xm=D×m, Yn=D×n, Wherein, D represents the separation distance between adjacent horizontal and vertical infrared photosensitive elements. 2. The infrared positioning method for liquid crystal display according to claim 1, characterized in that, comparing the current magnitudes detected by each infrared photosensitive element in the horizontal and vertical directions, and determining the level and the maximum detected current The steps of the vertical infrared photosensitive element are as follows: The current detected by each infrared sensor in the horizontal and vertical directions is amplified by the operational amplifier and converted into a voltage output; Perform analog-to-digital conversion on the voltage parameters of the voltage output to generate binary numbers, and temporarily store the converted binary numbers; The temporarily stored binary numbers are formed into horizontal and vertical arrays, and the maximum value in the horizontal and vertical arrays is found out through judgment and comparison, so as to determine the horizontal and vertical infrared photosensitive elements that detect the largest current. 3. The infrared positioning method for liquid crystal display according to claim 1, characterized in that, when only the infrared photosensitive element in one direction horizontally or vertically detects the current of the infrared light source, then it is determined that the infrared light source is invalid position signal. 4. A liquid crystal television with an infrared positioning function, characterized in that it comprises: The infrared detection module is used to respectively detect the current of the infrared light source signal projected on the liquid crystal display through the infrared photosensitive elements arranged horizontally and vertically on the edge of the liquid crystal display, and perform current detection on the current detected by these infrared photosensitive elements. One-to-one statistics; The position calculation module is used to compare the current detected by each infrared photosensitive element in the horizontal and vertical directions, and determine the horizontal and vertical infrared photosensitive element that detects the largest current; it is also used to calculate the horizontal and vertical infrared photosensitive element that detects the largest current The distance from the component to the origin, and generate the corresponding position coordinates; The processor is used to feed back the position coordinates generated by the position calculation module to the liquid crystal display for internal processing, and display the projection position of the infrared light source on the liquid crystal display in the form of a cursor; The position calculation module is an arithmetic unit, and the arithmetic unit also includes a formula for calculating the distance from the horizontal and vertical infrared photosensitive elements that detect the maximum current to the origin: Xm=D×m, Yn=D×n, Among them, Xm represents the distance from the horizontal infrared photosensitive element that detects the largest current to the origin, Yn represents the distance from the vertical infrared photosensitive element that detects the largest current to the origin, m represents the number of horizontal infrared photosensitive elements in the horizontal direction, and n represents The number of vertical infrared photosensitive elements in the vertical direction, D represents the distance between adjacent horizontal and vertical infrared photosensitive elements. 5. The LCD TV with infrared positioning function according to claim 4, wherein the infrared detection module is an infrared receiving scanning sensor, and the infrared receiving scanning sensor comprises: The first infrared receiving tube arranged horizontally on the upper or lower side of the liquid crystal display, and the second infrared receiving tube vertically arranged on the left or right side of the liquid crystal display, and the infrared photosensitive elements are evenly spaced on the first infrared receiving tube and the second infrared receiving tube. 6. The liquid crystal television with infrared positioning function according to claim 4, wherein the processor is a television chip. 7. The liquid crystal television with infrared positioning function according to claim 4, characterized in that, the display area of the liquid crystal display is provided with an infrared filter diaphragm for filtering out visible light; A metal frame is arranged outside the edge of the liquid crystal display to prevent the position of the infrared light source from overflowing the liquid crystal display.