CN211828056U - Automatic modulation system for white balance of display screen and automatic resistance value adjusting device - Google Patents
Automatic modulation system for white balance of display screen and automatic resistance value adjusting device Download PDFInfo
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- CN211828056U CN211828056U CN202020663019.5U CN202020663019U CN211828056U CN 211828056 U CN211828056 U CN 211828056U CN 202020663019 U CN202020663019 U CN 202020663019U CN 211828056 U CN211828056 U CN 211828056U
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Abstract
The utility model discloses a display screen white balance automatic modulation system and automatic resistance adjusting device, the system includes: the system comprises an optical acquisition subsystem, a control subsystem and at least one automatic resistance value adjusting device; wherein: the light collection subsystem is used for collecting light data of the display screen and transmitting the light data to the control subsystem; the control subsystem is used for analyzing the optical data and outputting a control signal to the automatic resistance value adjusting device; the automatic resistance value adjusting device is used for receiving the control signal and automatically adjusting the resistance value of the resistor. Through the embodiment of the utility model provides a, the light data through analysis light collection forms control signal, according to control signal automatically regulated resistance value, and accommodation is wide, and the precision is high, and the framework is simple, and is with low costs, can replace original manual regulation resistance to carry out the mode of testing, and is simple swift, and labour saving and time saving can realize the white balance automatic modulation of display screen.
Description
Technical Field
The utility model relates to an electronic information field, in particular to display screen white balance automatic modulation system and automatic resistance adjusting device.
Background
The driving mode of the display screen is matrix driving, a constant-current output driving chip is used in a circuit, the current of the constant current is controlled by the resistance value of an external resistor of the driving chip, in the actual manufacturing process, a first prototype is required to be produced for debugging each batch of products to determine the resistance value of the external resistor, and the debugging process is called white balance debugging.
According to different connection designs of external resistor circuits of the driving chip, two existing white balance debugging methods are available. One is to replace the fixed resistor by manual welding according to the tested screen brightness, and finally replace the fixed resistor to a corresponding resistance value. The second is to use an adjustable resistor for debugging, and when the appropriate resistance value is debugged, the fixed resistor is replaced by the adjustable resistor.
The two modes require manual and uninterrupted debugging, and the debugging generally needs 0.5H-1H once according to experience, so that the time and the labor are consumed.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a pair of display screen white balance automatic modulation system and automatic resistance adjusting device, the light data through analysis light collection form control signal, according to control signal automatically regulated resistance, accommodation is wide, and the precision is high, and the framework is simple, and is with low costs, can replace the mode that original manual regulation resistance carried out the test, and is simple swift, and labour saving and time saving can realize the white balance automatic modulation of display screen.
The utility model provides an above-mentioned technical problem adopted technical scheme as follows:
according to an aspect of the embodiments of the present invention, there is provided a display screen white balance automatic modulation system, the system includes: the system comprises an optical acquisition subsystem, a control subsystem and at least one automatic resistance value adjusting device; wherein:
the light collection subsystem is used for collecting light data of the display screen and transmitting the light data to the control subsystem;
the control subsystem is used for analyzing the optical data and outputting a control signal to the automatic resistance value adjusting device;
and the automatic resistance value adjusting device is used for receiving the control signal and automatically adjusting the resistance value of the resistor.
In one possible design, the control subsystem is configured to analyze the optical data transmitted by the optical acquisition subsystem and output a control signal to the automatic resistance adjustment apparatus, and includes: and the control subsystem receives the optical data transmitted by the optical acquisition subsystem, compares and analyzes the optical data with preset optical expected optical data, and outputs a control signal to the automatic resistance value adjusting device according to an analysis result.
In a possible design, the outputting a control signal to the automatic resistance value adjusting device according to the analysis result to automatically adjust the resistance value specifically includes:
if the analysis result is that the received optical data is matched with preset expected optical data, a control signal which does not need to adjust the resistance value is output to the automatic resistance value adjusting device;
if the analysis result is that the received optical data is larger than the preset optical expected optical data, outputting a control signal for increasing the resistance value to the automatic resistance value adjusting device;
and if the analysis result is that the received optical data is smaller than the preset optical expected optical data, outputting a control signal for reducing the resistance value to the automatic resistance value adjusting device.
In one possible design, the automatic resistance value adjusting device includes: the device comprises a light source, a photosensitive resistor, a constant current driver, a resistor connecting probe and a control signal connector; wherein:
the control signal connector is used for receiving the control signal transmitted by the control subsystem and transmitting the control signal to the constant current driver;
the constant current driver is used for providing a constant driving current for the luminous source according to the control signal, and comprises at least one output current port;
the luminous source is used for providing light energy for the photoresistor and automatically adjusting luminous intensity according to the driving current output by the constant current driver;
the photoresistor is used for receiving the light of the luminous source;
the resistance is connected with the probe, one end of the resistance is connected with the photosensitive resistor, and the other end of the resistance is connected with the display screen needing resistance adjustment.
In one possible design, the device further includes a power supply connector, and the power supply connector is used for connecting a connection port with an external power supply to supply power to the adjusting device.
In one possible design, the device further comprises a structural housing for protecting the internal electronics and preventing external light from entering to affect accuracy.
In one possible design, the display screen white balance automatic modulation system comprises three automatic resistance value adjusting devices, and the control subsystem analyzes light data transmitted by the light gun and outputs three control signals to the automatic resistance value adjusting devices respectively; and each automatic resistance value adjusting device is respectively used for receiving one path of control signal transmitted by the control subsystem and respectively and automatically adjusting the resistance value of the resistor.
According to the utility model discloses another aspect of the embodiment provides an automatic resistance value adjusting device, the device includes: the device comprises a light source, a photosensitive resistor, a constant current driver, a resistor connecting probe and a control signal connector; wherein:
the control signal connector is used for receiving the control signal transmitted by the control subsystem and transmitting the control signal to the constant current driver;
the constant current driver is used for providing a constant driving current for the luminous source according to the control signal, and comprises at least one output current port;
the luminous source is used for providing light energy for the photoresistor and automatically adjusting luminous intensity according to the driving current output by the constant current driver;
the photoresistor is used for receiving the light of the luminous source;
the resistance is connected with the probe, one end of the resistance is connected with the photosensitive resistor, and the other end of the resistance is connected with the display screen needing resistance adjustment.
In one possible design, the device further includes a power supply connector, and the power supply connector is used for connecting a connection port with an external power supply to supply power to the adjusting device.
In one possible design, the device further comprises a structural housing for protecting the internal electronics and preventing external light from entering to affect accuracy.
Compared with the prior art, the embodiment of the utility model provides a pair of display screen white balance automatic modulation system and automatic resistance adjusting device, the system includes: the system comprises an optical acquisition subsystem, a control subsystem and at least one automatic resistance value adjusting device; wherein: the light collection subsystem is used for collecting light data of the display screen and transmitting the light data to the control subsystem; the control subsystem is used for analyzing the optical data transmitted by the optical acquisition subsystem and outputting a control signal to the automatic resistance value adjusting device; and the automatic resistance value adjusting device is used for receiving the control signal sent by the control subsystem and automatically adjusting the resistance value of the resistor. Through the embodiment of the utility model provides a, the light data through analysis light collection forms control signal, makes automatic resistance value adjusting device according to control signal automatically regulated resistance value, and accommodation is wide, and the precision is high, and the framework is simple, and is with low costs, can replace the mode that original manual regulation resistance carried out the test, and is simple swift, and labour saving and time saving can realize the white balance automatic modulation of display screen.
Drawings
Fig. 1 is a schematic structural diagram of an automatic white balance modulation system for a display screen according to the present invention;
fig. 2 is a schematic diagram of a color temperature map composed of three colors of RGB provided by the present invention;
fig. 3 is a schematic structural diagram of an automatic resistance value adjusting device according to the present invention;
fig. 4 is a schematic structural diagram of another automatic resistance value adjusting device according to the present invention;
fig. 5 is a schematic structural diagram of another display screen white balance automatic modulation system according to the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention clearer and more obvious, the following description of the present invention with reference to the accompanying drawings and embodiments is provided for further details. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "part", or "unit" used to denote elements are used only for the convenience of description of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
In one embodiment, as shown in fig. 1, the present invention provides a display screen white balance automatic modulation system, comprising: a light collection subsystem 10, a control subsystem 20, at least one automatic resistance value adjustment device 30; wherein:
the optical acquisition subsystem 10 is configured to acquire optical data of a display screen and transmit the optical data to the control subsystem 20; wherein the optical data includes data of at least one of: brightness, color temperature. Preferably, the display screen is an LED display screen.
The control subsystem 20 is configured to analyze the optical data transmitted by the optical acquisition subsystem 10, and output a control signal to the automatic resistance adjusting device 30.
The automatic resistance value adjusting device 30 is configured to receive the control signal sent by the control subsystem 20, and automatically adjust the resistance value of the resistor.
In this embodiment, a control signal is formed by analyzing the light data collected by the light, so that the automatic resistance value adjusting device automatically adjusts the resistance value according to the control signal, and finally, the resistance value is changed into a fixed resistance according to the modulation. The adjusting range is wide, the precision is high, the framework is simple, the cost is low, the mode of testing the original manual adjusting resistor can be replaced, the operation is simple and rapid, the time and the labor are saved, and the white balance automatic modulation of the display screen can be realized.
Optionally, the light collection subsystem 10 includes a light gun or a colorimetric luminance meter. The light gun or the chromaticity luminance meter collects light data of the LED display screen and transmits the light data to the control subsystem 20; wherein the optical data includes data of at least one of: brightness, color temperature.
In one embodiment, the control subsystem 20 is configured to analyze the optical data transmitted by the optical acquisition subsystem 10 and output a control signal to the automatic resistance adjusting apparatus 30, and includes: the control subsystem 20 receives the optical data transmitted from the optical acquisition subsystem 10, compares and analyzes the optical data with the preset optical expected optical data, and outputs a control signal to the automatic resistance value adjusting device 30 to automatically adjust the resistance value according to the analysis result.
Specifically, outputting a control signal to the automatic resistance value adjusting device 30 according to the analysis result to automatically adjust the resistance value specifically includes:
if the analysis result is that the received optical data matches with the preset expected optical data, outputting a control signal not to adjust the resistance value to the automatic resistance value adjusting device 30;
if the analysis result is that the received optical data is greater than the preset optical expected optical data, outputting a control signal for increasing the resistance value to the automatic resistance value adjusting device 30;
if the analysis result is that the received light data is smaller than the preset light expected light data, a control signal for reducing the resistance value is output to the automatic resistance value adjusting device 30.
Preferably, the control subsystem 20 includes a control computer, and the control computer is configured to analyze the optical data transmitted by the optical acquisition subsystem 10 and output a control signal to the automatic resistance value adjusting device 30.
The display screen is composed of a plurality of light-emitting modules, the brightness of each light-emitting module is determined by the luminous intensity of the lamp wick during working, a driving circuit is formed on each light-emitting module by a driving chip, the driving chip outputs constant current for the lamp wick, the constant current is determined by the resistance value of a resistor externally connected with the driving chip, and the constant current driving current can be changed by adjusting the resistance value of the resistor, so that the maximum brightness of the light-emitting modules is changed.
The color temperature is a curve, and the color temperature standards of the common LED display screen are 6500K, 7500K and 8000K. As shown in fig. 2, it is a color temperature map composed of three colors of RGB. The color temperature is denoted by RGB three colors. The X axis is related to R, R influences the X direction, and the higher the brightness of R is, the larger the X value is; the Y axis is related to G, G influences the Y direction, and the higher the brightness of G, the larger the Y value; b affects X and Y directions simultaneously, and the larger the brightness of B is, the smaller the X and Y values are. In order to adjust to the required color temperature, the brightness of the three colors of R, G and B needs to be adjusted respectively.
In this embodiment, the external resistor end of the driving chip is connected to the automatic resistor resistance adjusting device 30, the automatic resistor resistance adjusting device 30 serves as the external resistor of the driving chip, and the resistance value of the driving chip is automatically adjusted by the automatic resistor resistance adjusting device 30, so that the magnitude of the constant current driving current of the driving chip is changed, and the maximum brightness of the light emitting module is changed.
In this embodiment, the desired RGB data is included in the preset desired light data. The light collection subsystem collects light data, including current RGB data of the display screen. The control subsystem compares and analyzes the current RGB data of the light data with expected RGB in preset light expected light data, and outputs a control signal to the automatic resistance value adjusting device to automatically adjust the resistance value according to an analysis result so as to adjust the matching of the current RGB data and the expected RGB data.
In this implementation, the control subsystem analyzes the light data collected by the light and the preset light expected light data to form a control signal, so that the automatic resistance value adjusting device automatically adjusts the resistance value of the resistor according to the control signal, and finally, the resistor is replaced by a fixed resistor according to the modulated resistance value. The adjusting range is wide, the precision is high, the framework is simple, the cost is low, the mode of testing the original manual adjusting resistor can be replaced, the operation is simple and rapid, the time and the labor are saved, and the white balance automatic modulation of the display screen can be realized.
In one embodiment, as shown in fig. 3, the automatic resistance value adjusting apparatus 30 includes: a light source 31, a photoresistor 32, a constant current driver 33, a resistance connection probe 34 and a control signal connector 35; wherein:
the control signal connector 35 is configured to receive the control signal transmitted by the control subsystem 20, and transmit the control signal to the constant current driver 33. For example, in fig. 3, the control signal connector 35 is a connector P1.
The constant current driver 33 is configured to provide a driving current with a constant magnitude for the light emitting source 31 according to the control signal. The constant current driver 33 has PWM and current gain functions, thereby adjusting the magnitude of the constant current output current of the constant current driver 33. The constant current driver 33 includes at least one output current port.
Preferably, the constant current driver 33 is a constant current driving chip. Such as the constant current driving chip U1 shown in fig. 3.
The light source 31 is configured to provide light energy to the photo resistor 32, and automatically adjust the light intensity according to the driving current output by the constant current driver 33. The larger the driving current output by the constant current driver 33 is, the higher the luminous intensity of the luminous source 31 is, and the higher the luminous brightness is; the smaller the driving current output by the constant current driver 33 is, the lower the light emission intensity of the light emission source 31 is, and the lower the light emission luminance is. Specifically, the light emitting source 31 is connected to an output current port of the constant current driver 33. For example, in fig. 3, the light emitting source 31 is an LED 1.
Preferably, the light-emitting source 31 is a white or green LED, because the wavelength range to which the photoresistor 32 is most sensitive to light is generally around 550 nm.
The light dependent resistor 32 is used for receiving the light of the light source 31. The resistance value of the photo resistor 32 can change along with the change of the light intensity of the light source 31, and the resistance value of the photo resistor 32 is inversely proportional to the light intensity of the light source 31, and the stronger the light intensity of the light source 31 is, the lower the resistance value of the photo resistor 32 is; the weaker the light intensity of the light source 31 is, the higher the resistance value of the light dependent resistor 32 is. For example, in fig. 3, the photo-resistor 32 is RD 1.
The photo-resistor 32 and the light source 31 are usually combined together, that is, one photo-resistor 32 and one light source 31 are combined together for use.
Preferably, the photoresistor 32 is generally selected to have a relatively low resistance at standard test luminous fluxes (e.g., 10 Lux).
The resistor is connected with the probe 34, one end of the resistor is connected with the photosensitive resistor 32, and the other end of the resistor is connected with the display screen unit board which needs resistance adjustment, so that the resistance value of the display screen unit board can be automatically adjusted according to the received control signal. For example, in fig. 3, the resistance connection probe 34 is probe P2.
The resistive connection probes 34 may be in the form of probes, solderable connections or other means that facilitate connection to resistive test sites on display panel elements.
Specifically, the resistance connection probe 34 is connected to an external resistor end of a driving chip of a light emitting module on the display screen unit board to be resistance-adjusted, so as to replace a fixed resistor, thereby realizing automatic adjustment of the resistance value of the resistor of the display screen unit board according to a received control signal.
In this embodiment, the light source 31, the photo resistor 32 and the resistance connection probe 34 generally form a group of resistance value adjusting modules for use, that is, one light source 31, one photo resistor 32 and one resistance connection probe 34 form a group of resistance value adjusting modules for use, and one group of resistance value adjusting modules can adjust a resistance value to realize automatic adjustment of a resistance value of the display screen unit board according to a received control signal.
In fig. 3, the automatic adjustment of the resistance value of one resistor of the display screen unit board is realized according to the received control signal, and the process is as follows:
the control signal connector 35 (port P1) receives a control signal from the control subsystem, the control signal is a GAMMAR timing sequence, and is input to the S-terminal input terminal of the constant current driver 33 (chip U1), the constant current driver 33 (chip U1) has a function of providing constant current output, and has a current gain function, the current gain refers to a function of adjusting the magnitude of the output energizing current, which is generally 8 bits (256 levels), by self-establishing a multi-level shunt resistor inside the constant current driver 33 (chip U1), the constant current driver 33 (chip U1) has a plurality of output current ports (for example 16 ports), the current of each output current port is the same, and the output current of the output current port can be controlled by combining CLK, LAT and OE control signals, so as to achieve the effect of changing the luminous intensity of the luminous source 31(LED1), the output current is larger and the brightness is higher, the smaller the output current, the lower the luminance. The photo resistor 32(RD1) receives the light emitted from the light source 31, and when the light intensity of the light source 31(LED1) changes, the resistance of the photo resistor 32(RD1) changes accordingly, and the stronger the light intensity, the lower the resistance. The resistance connection probe 34 (interface P2) is connected to 1 driving chip external resistance end of the lamp bead of the display screen light-emitting module to replace a fixed resistor. Therefore, the resistance value of the display screen unit board can be automatically adjusted according to the received control signal.
Preferably, as shown in fig. 4, when the constant current driver 33 includes a plurality of output current ports, a plurality of groups of resistance value adjusting modules may be controlled, that is, a plurality of groups of resistance value adjusting modules (a plurality of light emitting sources, a plurality of photo resistors, and a plurality of resistance connecting probes) not more than the output current ports may be provided as required, and the resistance values of the plurality of resistors are automatically adjusted according to the same control signal.
The constant current driver 33 includes a plurality of output current ports. The display screen comprises a plurality of light-emitting modules, each light-emitting module is driven by a driving chip, and the external resistance end of each driving chip is connected with the resistance connecting probe 34 of the automatic resistance value adjusting device. When the constant current driver includes a plurality of output current ports, a plurality of sets of resistance value adjusting modules, which are not more than the output current ports and are composed of the plurality of light emitting sources 31, the plurality of photoresistors 32 and the plurality of resistance connection probes 34, may be provided as required. At this moment, a plurality of resistance connection probes can be connected with a plurality of driving chip external connection resistance ends, so that the driving current of a plurality of driving chips can be changed according to the received same control signal drive, and the automatic adjustment of a plurality of resistance values of a plurality of resistors of the same color temperature (for example, the same R color) of the display screen unit board is realized.
For example, in fig. 4, the constant current driver 33 includes 16 output current ports OUT1-OUT 15. And 3 groups of resistance value adjusting modules are formed by 3 luminous sources 31 (LEDs 1-LEDs 3), 3 photoresistors 32(RD1-RD3) and 3 resistance connecting probes 34 (P2-P4). At this time, 3 of the resistance connection probes 34(P2-P4) may be connected to the external resistor terminals of 3 driver chips, so that the driving currents of the 3 driver chips may be changed according to the received same control signal, and the automatic adjustment of the 3 resistance values of the 3 resistor chips of the same color temperature (e.g., the same R color) of the display screen unit panel may be realized.
In fig. 4, the automatic adjustment of the resistance values of 3 resistors of the same color temperature of the display screen unit board is realized according to the received control signal, and the process is as follows:
the control signal connector 35(P1 port) receives a control signal from the control subsystem, the control signal is a GAMMAR timing sequence, and is input to the S terminal input end of the constant current driver 33 (chip U1), the constant current driver 33 (chip U1) has a function of providing constant current output, and has a current gain function, the current gain refers to a function of adjusting the magnitude of output energizing current by self-establishing a multi-stage shunt resistor inside the constant current driver 33 (chip U1), and is generally 8 bits (256 stages), the constant current driver 33 (chip U1) has a plurality of output current ports (for example 16 ports), the current of each output current port is the same, and the output current of the output current port can be controlled by combining CLK, LAT, and OE control signals, so as to change the intensity of the 3 light emitting sources 31 (LEDs 1-LEDs 3) to increase the brightness of the output current, the smaller the output current, the lower the luminance. The 3 photo resistors 32(RD1-RD3) respectively receive light emitted by the 3 light emitting sources 31(LED1-LED3), and when the light emitting intensity of the light emitting sources 31(LED1-LED3) changes, the resistance values of the photo resistors 32(RD1-RD3) also change accordingly, and the higher the light intensity is, the lower the resistance values are. The 3 resistance connection probes 34 (interfaces P2-P4) are connected to the external resistance ends of 3 driving chips of the lamp beads of the display screen light-emitting module to replace fixed resistors. Therefore, the automatic adjustment of the resistance values of the 3 resistors of the display screen unit board with the same color temperature can be realized according to the received control signal.
In one embodiment, as shown in fig. 3, the adjusting device 30 further includes a power supply connector 36, and the power supply connector 36 is used for connecting a connection port with an external power supply to supply power to the adjusting device. The input power supply voltage range of the external power supply is between 3.3V and 5V, the specific power supply voltage value is determined according to the luminous source, generally, the red light LED is adopted as the luminous source, the power supply voltage can be as low as 3.3V, and the green light LED, the blue light LED or the white light LED is adopted as the luminous source, and the power supply voltage can be as low as 4.2V.
Preferably, the control signal connector 35 and the power supply connector 36 may be the same connector, and the control signal and power supply connector 38 is a connection port for connecting an external input control signal and an external power supply, and may provide a function of connecting the external input control signal and the external power supply.
In one embodiment, the adjustment device 30 further comprises a structural housing (not shown), which is a sealed enclosure for protecting the internal electronics and preventing external light from entering and affecting accuracy.
Preferably, the color of the shell of the structure 37 is black matte, so that the shell can play a role in protecting internal electronic devices and preventing external light from entering to influence precision.
In one embodiment, as shown in fig. 5, the display screen white balance automatic modulation system includes three automatic resistance value adjusting devices 30. At this time, the control subsystem 20 analyzes the light data transmitted by the light gun, and outputs three control signals to the automatic resistance adjusting device 30.
Each of the automatic resistance value adjusting devices 30 is configured to receive a control signal transmitted by the control subsystem 20, and respectively and automatically adjust the resistance value. That is, one of the automatic resistance adjusting devices 30 receives one of the R color control signals transmitted by the control subsystem 20, one of the automatic resistance adjusting devices 30 receives one of the G color control signals transmitted by the control subsystem 20, and one of the automatic resistance adjusting devices 30 receives one of the B color control signals transmitted by the control subsystem 20.
In this embodiment, the light data collected by the light and the predetermined light expected light data are analyzed by the control computer to form RGB three-way control signals, so that the three automatic resistance value adjusting devices automatically adjust the corresponding resistance values according to the respective control signals, and finally, the fixed resistance is replaced according to the modulated resistance value. The adjusting range is wide, and the precision is high, and the framework is simple, and is with low costs, can replace the mode that original manual adjustment resistance carried out the test, and is simple swift, labour saving and time saving can adjust the RGB three-colour of LED display screen simultaneously to realize the white balance automatic modulation of display screen.
The technical solution of the present invention is further described in detail with reference to specific examples.
Example 1:
in one embodiment, the present invention provides a white balance automatic modulation system, as shown in fig. 1. In this embodiment, the light collection subsystem 10 is illustrated by taking a light gun as an example, the control subsystem 20 is illustrated by taking a control computer as an example, the display screen is illustrated by taking an LED display screen as an example, and the control signal connector 35 and the power supply connector 36 are integrated in the same connector as the control signal and power supply connector 38.
In this embodiment, as shown in fig. 1, the present invention provides an LED display screen white balance automatic modulation system, including: a light gun 10, a control computer 20 and an automatic resistance value adjusting device 30; wherein:
the light gun 10 is used for collecting light data of the LED display screen and transmitting the light data to the control computer 20; wherein the optical data includes data of at least one of: brightness, color temperature.
The control computer 20 is configured to analyze the light data transmitted from the light gun 10, and output a control signal to the automatic resistance value adjusting device 30. The method comprises the following steps: the control computer 20 receives the light data transmitted from the light gun 10, compares and analyzes the light data with the preset light expected light data, and outputs a control signal to the automatic resistance value adjusting device 30 to automatically adjust the resistance value according to the analysis result.
Specifically, outputting a control signal to the automatic resistance value adjusting device 30 according to the analysis result to automatically adjust the resistance value specifically includes:
if the analysis result is that the received optical data matches with the preset expected optical data, outputting a control signal not to adjust the resistance value to the automatic resistance value adjusting device 30;
if the analysis result is that the received optical data is greater than the preset optical expected optical data, outputting a control signal for increasing the resistance value to the automatic resistance value adjusting device 30;
if the analysis result is that the received light data is smaller than the preset light expected light data, a control signal for reducing the resistance value is output to the automatic resistance value adjusting device 30.
The automatic resistance value adjusting device 30 receives the control signal sent by the control computer 20, and automatically adjusts the resistance value of the resistor. As shown in fig. 3, the automatic resistance value adjusting apparatus 30 includes: the device comprises a light source 31, a photoresistor 32, a constant current driver 33, a resistance connecting probe 34, a structural shell, a control signal and power supply connector 38; wherein:
the control signal and power supply connector 38 is configured to receive a control signal transmitted by the control computer 20, and transmit the control signal to the constant current driver 33; and the connection port is connected with an external power supply and provides power for the adjusting device. For example, in fig. 3, the control signal and power connector 38 is a connector P1.
The constant current driver 33 is a constant current driving chip (e.g., the constant current driving chip U1 shown in fig. 3) configured to provide a driving current of a constant magnitude for the light emitting source 31 according to the control signal. The constant current driver 33 has PWM and current gain functions, thereby adjusting the magnitude of the constant current output current of the constant current driver 33. The constant current driver 33 includes at least one output current port.
The light source 31 is configured to provide light energy to the photo resistor 32, and automatically adjust the light intensity according to the driving current output by the constant current driver 33. The light emitting source 31 is connected to an output current port of the constant current driver 33. In this embodiment, the light source is a white LED, for example, in fig. 3, the light source 31 is an LED 1.
The light dependent resistor 32 is used for receiving the light of the light source 31. For example, in fig. 3, the photo-resistor 32 is RD 1.
One end of the resistor connecting probe 34 is connected with the photosensitive resistor 32, and the other end of the resistor connecting probe is connected to an external resistor end of a driving chip of an LED light-emitting module on the LED display screen unit board which needs to be subjected to resistance adjustment, so that a fixed resistor is replaced, and the resistance value of the resistor of the LED display screen unit board is automatically adjusted according to a received control signal. In this embodiment, the resistive connection probe 34 is in the form of a stylet. For example, in fig. 3, the resistance connection probe 34 is probe P2.
In this embodiment, the light source 31, the photo resistor 32 and the resistance connection probe 34 generally form a group of resistance value adjusting modules for use, that is, one light source 31, one photo resistor 32 and one resistance connection probe 34 form a group of resistance value adjusting modules for use, and one group of resistance value adjusting modules can adjust a resistance value to realize automatic adjustment of a resistance value of the LED display screen unit board according to a received control signal.
The structure shell is a sealed shell, is black and matte in color and is used for protecting internal electronic devices and preventing external light from entering to influence precision.
In this embodiment, the control signal is formed by analyzing the light data collected by the light and the preset light expected light data by the control computer, so that the automatic resistance value adjusting device automatically adjusts the resistance value of the resistor according to the control signal, and finally, the resistor is replaced by a fixed resistor according to the modulated resistance value. The LED display screen has the advantages of wide adjusting range, high precision, simple structure, low cost, simplicity, rapidness, time saving and labor saving, can replace the original mode of manually adjusting the resistor for testing, and can adjust the brightness or the RGB color temperature of the LED display screen, thereby realizing the automatic white balance modulation of the LED display screen.
Example 2:
in one embodiment, the present invention provides a white balance automatic modulation system, as shown in fig. 5. In this embodiment, the light collection subsystem 10 is illustrated by taking a light gun as an example, the control subsystem 20 is illustrated by taking a control computer as an example, the display screen is illustrated by taking an LED display screen as an example, and the control signal connector 35 and the power supply connector 36 are integrated in the same connector as the control signal and power supply connector 38.
In this embodiment, as shown in fig. 5, the present invention provides an LED display screen white balance automatic modulation system, including: the light gun comprises a light gun 10, a control computer 20 and three automatic resistance value adjusting devices 30; wherein:
the light gun 10 is used for collecting light data of the LED display screen and transmitting the light data to the control computer 20; wherein the optical data comprises a color temperature. The color temperature is denoted by RGB three colors.
The control computer 20 is configured to analyze the light data transmitted by the light gun 10, and output three control signals to the automatic resistance adjusting device 30. The method comprises the following steps: the control computer 20 receives the light data transmitted from the light gun 10, compares and analyzes the light data with the preset light expected light data, and outputs RGB three-way control signals to the automatic resistance value adjusting device 30 to automatically adjust the resistance value according to the analysis result.
Specifically, the outputting RGB three-way control signals to the automatic resistance value adjusting device 30 according to the analysis result to automatically adjust the resistance value specifically includes:
if the analysis result is that the received light data is matched with the preset expected light data, outputting three control signals of RGB without adjusting the resistance value to the automatic resistance value adjusting device 30;
if the analysis result is that the received light data is larger than the preset light expected light data, outputting three control signals of RGB for increasing the resistance value to the automatic resistance value adjusting device 30;
if the analysis result is that the received light data is smaller than the preset light expected light data, three control signals of RGB with reduced resistance values are output to the automatic resistance value adjusting device 30.
Each of the automatic resistance value adjusting devices 30 is configured to receive a control signal transmitted by the control computer 20, and respectively and automatically adjust the resistance value. Namely, one of the automatic resistance value adjusting devices 30 receives one R color control signal transmitted by the control computer 20, one of the automatic resistance value adjusting devices 30 receives one G color control signal transmitted by the control computer 20, and one of the automatic resistance value adjusting devices 30 receives one B color control signal transmitted by the control computer 20.
As shown in fig. 3, each of the automatic resistance adjusting devices 30 includes: the device comprises a light source 31, a photoresistor 32, a constant current driver 33, a resistance connecting probe 34, a structural shell, a control signal and power supply connector 38; wherein:
the control signal and power supply connector 38 is configured to receive a control signal transmitted by the control computer 20, and transmit the control signal to the constant current driver 33; and the connection port is connected with an external power supply and provides power for the adjusting device. For example, in fig. 3, the control signal and power connector 38 is a connector P1.
The constant current driver 33 is a constant current driving chip (e.g., the constant current driving chip U1 shown in fig. 3) configured to provide a driving current of a constant magnitude for the light emitting source 31 according to the control signal. The constant current driver 33 has PWM and current gain functions, thereby adjusting the magnitude of the constant current output current of the constant current driver 33. The constant current driver 33 includes at least one output current port.
The light source 31 is configured to provide light energy to the photo resistor 32, and automatically adjust the light intensity according to the driving current output by the constant current driver 33. The light emitting source 31 is connected to an output current port of the constant current driver 33. In this embodiment, the light source is a white LED, for example, in fig. 3, the light source 31 is an LED 1.
The light dependent resistor 32 is used for receiving the light of the light source 31. For example, in fig. 3, the photo-resistor 32 is RD 1.
One end of the resistor connecting probe 34 is connected with the photosensitive resistor 32, and the other end of the resistor connecting probe is connected to an external resistor end of a driving chip of an LED light-emitting module on the LED display screen unit board which needs to be subjected to resistance adjustment, so that a fixed resistor is replaced, and the resistance value of the resistor of the LED display screen unit board is automatically adjusted according to a received control signal. In this embodiment, the resistive connection probe 34 is in the form of a stylet. For example, in fig. 3, the resistance connection probe 34 is probe P2.
In this embodiment, the light source 31, the photo resistor 32 and the resistance connection probe 34 generally form a group of resistance value adjusting modules for use, that is, one light source 31, one photo resistor 32 and one resistance connection probe 34 form a group of resistance value adjusting modules for use, and one group of resistance value adjusting modules can adjust a resistance value to realize automatic adjustment of a resistance value of the LED display screen unit board according to a received control signal. For example, the automatic adjustment of the resistance value of the R color controlling resistor of the LED display screen unit board is realized according to the received R color control signal.
The structure shell is a sealed shell, is black and matte in color and is used for protecting internal electronic devices and preventing external light from entering to influence precision.
In this embodiment, the light data collected by the light and the predetermined light expected light data are analyzed by the control computer to form RGB three-way control signals, so that the three automatic resistance value adjusting devices automatically adjust the corresponding resistance values according to the respective control signals, and finally, the fixed resistance is replaced according to the modulated resistance value. The adjusting range is wide, and the precision is high, and the framework is simple, and is with low costs, can replace the mode that original manual adjusting resistance carried out the test, and is simple swift, labour saving and time saving can adjust the RGB three-colour of LED display screen simultaneously to realize the white balance automatic modulation of LED display screen.
Furthermore, as shown in fig. 4, on the basis of embodiment 2, when the constant current driver 33 of each automatic resistance value adjusting device 30 includes a plurality of output current ports, a plurality of sets of resistance value adjusting modules, which are not more than the output current ports and are composed of a plurality of light emitting sources 31, a plurality of photo resistors 32 and a plurality of resistance connection probes 34, may be provided as required. At this time, the plurality of resistance connection probes 34 may be connected to external resistance ends of the plurality of driver chips, so that the driver currents of the plurality of driver chips may be changed according to the received same control signal, and the automatic adjustment of the resistance values of the plurality of resistors of the same color temperature (for example, the same R color) of the LED display screen unit panel may be realized. On the basis that this embodiment 2 is equipped with three automatic resistance value adjusting device, can realize simultaneously the automatically regulated of a plurality of resistance values of same colour temperature in the RGB three-colour of LED display screen cell board.
For example, as shown in fig. 4, the constant current driver 33 includes 16 output current ports OUT1-OUT 15. And 3 groups of resistance value adjusting modules are formed by 3 luminous sources 31 (LEDs 1-LEDs 3), 3 photoresistors 32(RD1-RD3) and 3 resistance connecting probes 34 (P2-P4). At this time, 3 of the resistance connection probes 34(P2-P4) may be connected to the external resistor terminals of 3 driver chips, so that the driving currents of the 3 driver chips may be changed according to the received same control signal, and the automatic adjustment of the 3 resistance values of the 3 resistor chips of the same color temperature (e.g., the same R color) of the display screen unit panel may be realized. And finally, replacing the resistance value of the resistor according to the modulation with a fixed resistor.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (10)
1. An automatic white balance modulation system for a display screen, the system comprising: the system comprises an optical acquisition subsystem, a control subsystem and at least one automatic resistance value adjusting device; wherein:
the light collection subsystem is used for collecting light data of the display screen and transmitting the light data to the control subsystem;
the control subsystem is used for analyzing the optical data and outputting a control signal to the automatic resistance value adjusting device;
and the automatic resistance value adjusting device is used for receiving the control signal and automatically adjusting the resistance value of the resistor.
2. The system of claim 1, wherein the control subsystem is configured to analyze the light data and output a control signal to the automatic resistance adjustment device, comprising: and the control subsystem receives the optical data transmitted by the optical acquisition subsystem, compares and analyzes the optical data with preset optical expected optical data, and outputs a control signal to the automatic resistance value adjusting device according to an analysis result.
3. The system according to claim 2, wherein the outputting a control signal to the automatic resistance adjusting device according to the analysis result to automatically adjust the resistance of the resistor comprises:
if the analysis result is that the received optical data is matched with preset expected optical data, a control signal which does not need to adjust the resistance value is output to the automatic resistance value adjusting device;
if the analysis result is that the received optical data is larger than the preset optical expected optical data, outputting a control signal for increasing the resistance value to the automatic resistance value adjusting device;
and if the analysis result is that the received optical data is smaller than the preset optical expected optical data, outputting a control signal for reducing the resistance value to the automatic resistance value adjusting device.
4. The system of claim 1, wherein the automatic resistance value adjustment device comprises: the device comprises a light source, a photosensitive resistor, a constant current driver, a resistor connecting probe and a control signal connector; wherein:
the control signal connector is used for receiving the control signal transmitted by the control subsystem and transmitting the control signal to the constant current driver;
the constant current driver is used for providing a constant driving current for the luminous source according to the control signal, and comprises at least one output current port;
the luminous source is used for providing light energy for the photoresistor and automatically adjusting luminous intensity according to the driving current output by the constant current driver;
the photoresistor is used for receiving the light of the luminous source;
the resistance is connected with the probe, one end of the resistance is connected with the photosensitive resistor, and the other end of the resistance is connected with the display screen needing resistance adjustment.
5. The system of claim 4, wherein the device further comprises a power supply connector for connecting to a connection port of an external power source to supply power to the regulating device.
6. The system of claim 4, wherein the device further comprises a structural enclosure for protecting internal electronics and preventing external light from entering and affecting accuracy.
7. The system of claim 1, wherein the display white balance automatic modulation system comprises three automatic resistance value adjusting devices, and the control subsystem analyzes the light data transmitted from the light collection subsystem and outputs three control signals to the automatic resistance value adjusting devices respectively; and each automatic resistance value adjusting device is respectively used for receiving one path of control signal transmitted by the control subsystem and respectively and automatically adjusting the resistance value of the resistor.
8. An automatic resistance value adjusting device, characterized in that the device comprises: the device comprises a light source, a photosensitive resistor, a constant current driver, a resistor connecting probe and a control signal connector; wherein:
the control signal connector is used for receiving the control signal transmitted by the control subsystem and transmitting the control signal to the constant current driver;
the constant current driver is used for providing a constant driving current for the luminous source according to the control signal, and comprises at least one output current port;
the luminous source is used for providing light energy for the photoresistor and automatically adjusting luminous intensity according to the driving current output by the constant current driver;
the photoresistor is used for receiving the light of the luminous source;
the resistance is connected with the probe, one end of the resistance is connected with the photosensitive resistor, and the other end of the resistance is connected with the display screen needing resistance adjustment.
9. The device of claim 8, further comprising a power supply connector for connecting to a connection port of an external power source to supply power to the regulating device.
10. The device of claim 8, further comprising a structural enclosure for protecting internal electronics and preventing external light from entering and affecting accuracy.
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