CN111818695A - Control system, method and display module - Google Patents
Control system, method and display module Download PDFInfo
- Publication number
- CN111818695A CN111818695A CN202010653713.3A CN202010653713A CN111818695A CN 111818695 A CN111818695 A CN 111818695A CN 202010653713 A CN202010653713 A CN 202010653713A CN 111818695 A CN111818695 A CN 111818695A
- Authority
- CN
- China
- Prior art keywords
- ambient light
- microcontroller
- light sensor
- memory
- communication bus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004891 communication Methods 0.000 claims abstract description 61
- 238000001514 detection method Methods 0.000 claims description 8
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical compound OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 230000000007 visual effect Effects 0.000 description 5
- 238000012546 transfer Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
- H05B45/12—Controlling the intensity of the light using optical feedback
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention relates to a control system, a control method and a display module, which comprise a time schedule controller, a microcontroller, an ambient light sensor and a first memory; the time schedule controller is connected with the microcontroller through a communication bus, and the ambient light sensor and the first memory are both mounted on the communication bus; in the setting stage, when receiving the control instruction of the ambient light sensor, the time schedule controller writes the state data corresponding to the control instruction of the ambient light sensor into the first memory through the communication bus so as to adjust the working state of the microcontroller to the ambient light sensor in the working stage. The invention can realize the storage of the working state of the ambient light sensor set by a user, solve the problem of collocation between the module of the display and the system in the power-off state of the PCBA and improve the competitiveness of the product.
Description
Technical Field
The invention relates to the technical field of display, in particular to a control system, a control method and a display module.
Background
Ambient Light Sensors (ALS) are increasingly used in various displays and lighting devices to save power and improve user experience. With the ALS solution, the system can automatically adjust the brightness of the display screen according to the ambient light intensity. Because the power consumption of the backlight illumination occupies a large proportion of the total power consumption of the system, the dynamic backlight brightness control is implemented, and a large amount of power can be saved. In addition, the method can improve the user experience and lead the brightness of the display screen to be automatically adjusted to the optimal state according to the ambient light conditions.
In the prior art, when a user needs to turn on or turn off the ALS, instruction data needs to be sent to the timing controller through upper computer software in a one-way mode, when a system in the display is in a dormant state, a Printed Circuit Board Assembly (PCBA) is in a power-down state, when the PCBA is powered on again, the display can only work in an initial default state, and the user does not use previous setting of the user, and at the moment, the user can only use the upper computer software to send the instruction data to the timing controller once again, so that the display can work normally according to needs.
Disclosure of Invention
In view of this, an object of the present invention is to provide a control system, a method and a display module, which can store the working state of the ambient light sensor set by the user, solve the problem of collocation between the module and the system of the display in the power-off state of the PCBA, and prompt the competitiveness of the product.
In order to achieve the above object, a first aspect of embodiments of the present invention provides a control system, which includes, as one implementation manner, a timing controller, a microcontroller, an ambient light sensor, and a first memory;
the time schedule controller is connected with the microcontroller through a communication bus, and the ambient light sensor and the first memory are both mounted on the communication bus;
in the setting stage, after receiving an ambient light sensor control instruction, the timing controller writes state data corresponding to the ambient light sensor control instruction into the first memory through the communication bus, so as to adjust the working state of the microcontroller on the ambient light sensor in the working stage.
As one embodiment, the timing controller further includes a first I/O port, and the timing controller is connected to the microcontroller through the first I/O port, so that in a setup phase, when the timing controller receives the ambient light sensor control instruction, the timing controller sends a notification signal to the microcontroller, so that the microcontroller adjusts an operating state, and the timing controller and the microcontroller are prevented from using the communication bus at the same time.
As one embodiment, the ambient light sensor control command includes an on command and an off command, and when the timing controller receives the off command, the timing controller first notifies the microcontroller through the first I/O port to stop detecting ambient light, releases the communication bus, and then writes an off state into the first memory through the communication bus; when the time schedule controller receives the starting instruction, the time schedule controller firstly writes the starting state into the first memory through the communication bus, and then informs the microcontroller through the first I/O port that the detection of the ambient light can be started, so that the communication bus is occupied by the microcontroller.
As one embodiment, the control system further includes a second memory, which is mounted on the communication bus and used for storing data of the timing controller.
In one embodiment, the communication bus is an I2C bus, and the memory is an EEPROM memory.
As one embodiment, the microcontroller further includes a wide-narrow viewing angle control signal input end, and when the microcontroller receives a narrow viewing angle control signal through the wide-narrow viewing angle control signal input end, the microcontroller acquires state data corresponding to the ambient light sensor control instruction stored in the first memory, and adjusts a working state of the microcontroller on the ambient light sensor.
To achieve the above object, a second aspect of the present invention provides a control method, as one embodiment thereof, including:
after receiving an ambient light sensor control instruction, the time schedule controller writes state data corresponding to the ambient light sensor control instruction into a first memory through a communication bus;
the microcontroller adjusts the working state of the ambient light sensor according to the state data in the first memory.
As one of the embodiments, the control method further includes: and the upper computer reads the state data from the first memory before sending the control instruction of the ambient light sensor to the time sequence controller so as to keep the state displayed by the upper computer consistent with the state of the ambient light sensor.
In one embodiment, the ambient light sensor control commands include an on command and an off command,
when the time schedule controller receives the closing instruction, the time schedule controller informs the microcontroller to stop detecting the ambient light through a first I/O port, releases the communication bus, and writes closing state data into the first memory through the communication bus;
when the time schedule controller receives the starting instruction, the time schedule controller firstly writes starting state data into the first memory through the communication bus, and then informs the microcontroller through the first I/O port that the detection of ambient light can be started, so that the communication bus is occupied by the microcontroller.
In order to achieve the above object, a third aspect of the present invention provides a display module, as an embodiment, including an LED string, an LED driver, and the control system of any of the above embodiments, where the LED driver is connected to the microcontroller, and the LED string is connected to the LED driver; the microcontroller also receives a first pulse width modulation signal sent by the time sequence controller, and outputs a second pulse width modulation signal to the LED driver according to the first pulse width modulation signal and the detection data of the ambient light sensor so as to set the current output by the LED driver to the LED lamp string.
In summary, the present invention provides a control system, a control method and a display module, including a timing controller, a microcontroller, an ambient light sensor and a first memory, wherein the timing controller is connected to the microcontroller through a communication bus, the ambient light sensor and the first memory are both mounted on the communication bus, and in a setup phase, when receiving an ambient light sensor control instruction, the timing controller writes state data corresponding to the ambient light sensor control instruction into the first memory through the communication bus, so as to control a communication state between the microcontroller and the ambient light sensor in a working phase. The invention can realize the storage of the working state of the ambient light sensor set by a user, solve the problem of collocation between the module of the display and the system in the power-off state of the PCBA and prompt the competitiveness of the product.
Drawings
Fig. 1 is a schematic structural diagram of a control system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a control system according to a second embodiment of the present invention.
Fig. 3 is a flowchart of an implementation of a control method according to a third embodiment of the present invention.
Fig. 4 is a flowchart illustrating an implementation of a control method according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a backlight control device according to a fourth embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a display module according to a fifth embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer and more complete, the technical solutions of the present invention will be described below with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all, of the embodiments of the present invention, and are only used for explaining the present invention, and are not used to limit the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of a control system according to an embodiment of the present invention. As shown in fig. 1, the control system includes a timing controller 10, a microcontroller 11, an ambient light sensor 12, and a first memory 13; the time schedule controller 10 is connected with the microcontroller 11 through a communication bus, and the ambient light sensor 12 and the first memory 13 are both mounted on the communication bus; in the setting stage, when receiving the control command of the ambient light sensor, the timing controller 10 writes the state data corresponding to the control command of the ambient light sensor into the first memory 13 through the communication bus, so as to adjust the operating state of the microcontroller 11 on the ambient light sensor 12 in the operating stage.
The setting stage and the working stage are not fixed corresponding to the normal working stage and the abnormal working stage of the display, but the operation of a user is used as a judgment standard, when the user needs to send an instruction to the timing controller through the upper computer software, the setting stage is adopted, and other running states are the working stages in the technical scheme of the invention.
It should be noted that in this embodiment, the first memory 13 is a memory chip whose data is not lost after power failure, and can erase existing information and reprogram the memory, for example, an EEPROM (electrically erasable programmable read only memory) is a memory whose data is not lost after power failure, and is often used to store some configuration information so as to load the system when the system is powered up again.
It should be noted that, in the embodiment of the present invention, each element may be integrated on a PCB (Printed Circuit Board).
Therefore, the control system provided by the embodiment can store the working state of the ambient light sensor set by the user, solve the problem of collocation between the module of the display and the system in the power-off state of the PCBA, and prompt the competitiveness of the product.
Example two
Referring to fig. 2, fig. 2 is a schematic structural diagram of a control system according to a second embodiment of the present invention. As shown in fig. 2, the control system includes a timing controller 10, a microcontroller 11, an ambient light sensor 12, and a first memory 13; the time schedule controller 10 is connected with the microcontroller 11 through a communication bus, and the ambient light sensor 12 and the first memory 13 are both mounted on the communication bus; in the setting stage, when receiving the control command of the ambient light sensor 12, the timing controller 10 writes the state data corresponding to the control command of the ambient light sensor into the first memory 13 through the communication bus, so as to adjust the operating state of the microcontroller 11 on the ambient light sensor 12 in the operating stage.
In one embodiment, the communication bus is an I2C bus.
Specifically, the I2C (Inter-Integrated Circuit) bus is a simple, bi-directional two-wire synchronous serial bus developed by Philips corporation. It requires only two wires to transfer information between devices connected to the bus. The master device is used to initiate the bus to transfer data and generate a clock to open up the transferred devices, when any addressed device is considered a slave device, the relationship between master and slave, transmit and receive on the bus is not constant, but depends on the direction of data transfer at that time. If the host wants to send data to the slave device, the host addresses the slave device first, then actively sends the data to the slave device, and finally the host terminates the data transmission; if the host is to receive data from the slave device, the slave device is first addressed by the master device, then the host receives the data sent by the slave device, and finally the host terminates the receiving process. In which case the host is responsible for generating the timing clock and terminating the data transfer.
In an embodiment, the timing controller 10 further includes a first I/O port, and the timing controller 10 is connected to the microcontroller 11 through the first I/O port, so that in the setting stage, when the timing controller 10 receives the control command of the ambient light sensor 12, the timing controller 10 sends a notification signal to the microcontroller 11, so that the microcontroller 11 adjusts the working state, and the timing controller 10 and the microcontroller 11 are prevented from using a communication bus at the same time.
In particular, in the present embodiment, since two host elements of the timing controller 10 and the microcontroller 11 exist on the communication bus, when both elements operate the ambient light sensor 12 or the first memory 13, there is a risk that data of both elements may be erroneous. For example, if two or more masters initiate data transmission simultaneously, the I2C bus acts as a true multi-master bus, and data errors occur, so that while any device can act as both a master and a slave, only one master is allowed at a time. In order to avoid such a situation, in the present embodiment, an I/O port is added, and the timing controller 10 sends a notification signal to the microcontroller 11, and meanwhile, the problem of data error is effectively avoided by matching with the system flow.
In one embodiment, the control command of the ambient light sensor 12 includes a turn-on command and a turn-off command, when the timing controller 10 receives the turn-off command, the timing controller 10 first notifies the microcontroller 11 through the first I/O port to stop detecting the ambient light, releases the communication bus, and then writes the turn-off state into the first memory 13 through the communication bus; when the timing controller 10 receives the on command, the timing controller 10 first writes the on state into the first memory 13 through the communication bus, and then notifies the microcontroller 11 through the first I/O port that the detection of the ambient light can be started, so that the communication bus is occupied by the microcontroller 11.
Specifically, by adding the first I/O port, by sending a notification signal, for example, representing different setting states of the ambient light sensor 12, i.e., on and off, by a high-low level, and by matching with the above system flow, it can be ensured that only one host on the communication bus is using the bus, and it can also be ensured that the display state of the host is consistent with the state of the ambient light sensor 12 controlled by the microcontroller 11.
It should be noted that, for the display, when the system is awakened from sleep, i.e. the PCBA is powered down to power up, at the moment the PCBA is powered up, the microcontroller 11 will read the state of the ambient light sensor 12 from the first memory 13, and the upper computer also reads the state of the ambient light sensor 12 from the first memory 13 through the timing controller 10, so as to make it keep consistent with the setting state of the user.
It is worth mentioning that the ambient light sensor 12 is a passive device, which cannot actively transmit data, and can only actively read or not read by the microcontroller 11, so that the state of the ambient light sensor 12 in this application is substantially what kind of operating state the microcontroller 11 performs on the ambient light sensor 12, i.e. reading data or not reading data, so that the ambient light sensor 12 controls the command to control the microcontroller 11.
In one embodiment, the first I/O port is a GPIO port.
Specifically, GPIO (General-purpose input/output), a General purpose input/output, is abbreviated as P0-P3, which functions like an 8051 single chip microcomputer, and its PIN can be freely used by a user through program control, and the PIN can be used as General Purpose Input (GPI) or General Purpose Output (GPO) or General Purpose Input and Output (GPIO) depending on practical considerations.
In one embodiment, the timing controller 10 further includes an Aux port for receiving an ambient light sensor control command sent by the upper computer.
In one embodiment, the control system further includes a second memory 14, the second memory 14 being mounted on the communication bus for storing data of the timing controller 10.
Specifically, both the second memory 14 and the first memory 13 may be an EEPROM or a Ferroelectric RAM (FRAM).
In an embodiment, the microcontroller further includes a wide-narrow viewing angle control signal input end, and when the microcontroller receives the narrow viewing angle control signal through the wide-narrow viewing angle control signal input end, the microcontroller acquires state data corresponding to the control instruction of the ambient light sensor stored in the first memory, and adjusts the working state of the microcontroller on the ambient light sensor.
Specifically, for better optimization of the display effect in the narrow viewing angle display mode, the brightness of the display module is automatically adjusted by combining with the ambient light. Therefore, in this embodiment, the wide-narrow viewing angle control signal is used as a precondition for controlling the working state of the microcontroller to the ambient light sensor, and when the microcontroller receives the narrow viewing angle control signal, the microcontroller acquires state data corresponding to the ambient light sensor control instruction stored in the first memory, and adjusts the working state of the microcontroller to the ambient light sensor. For example, if the wide and narrow viewing angle control signal is the narrow viewing angle control signal, but the status data corresponding to ALS OFF is stored in the first memory, the microcontroller does not adjust the brightness of the display module according to the ambient light data. Only when the wide and narrow visual angle control signal is the narrow visual angle control signal and the state data corresponding to ALS ON is stored in the first memory, the microcontroller adjusts the brightness of the display module by combining the ambient light data.
In summary, the control system provided in this embodiment can store the working state of the ambient light sensor set by the user, solve the problem of collocation between the module of the display and the system in the power-off state of the PCBA, and prompt the competitiveness of the product.
EXAMPLE III
Referring to fig. 1-3, fig. 3 is a flowchart of a control method according to a third embodiment of the present invention. As shown in fig. 3, the control method includes:
step S1: after receiving the control instruction of the ambient light sensor, the time schedule controller writes the state data corresponding to the control instruction of the ambient light sensor into the first memory through the communication bus;
step S2: the microcontroller adjusts the working state of the ambient light sensor according to the state data in the first memory.
In one embodiment, the method further comprises: and the upper computer reads the state data from the first memory before sending the control instruction of the ambient light sensor to the time sequence controller so as to keep the state displayed by the upper computer consistent with the state of the ambient light sensor.
Specifically, referring to fig. 1 to 3 in combination, in the setup phase, when the upper computer sends the ambient light control command through the AUX interface on the timing controller 10, in order to avoid abnormal sending, if the first memory stores on-state data, then sending the on-state data through the upper computer is abnormal sending, so that the state of the ambient light sensor displayed on the upper computer needs to be kept consistent with the actual state of the ambient light sensor, and therefore, before the upper computer sends the ambient light control command, the state data needs to be read from the first memory to keep the state of the ambient light sensor consistent with the state of the upper computer.
In one embodiment, the ambient light sensor control commands include an on command and an off command,
when the time sequence controller receives a closing instruction, the time sequence controller firstly informs the microcontroller to stop detecting the ambient light through the first I/O port, releases the communication bus, and then writes closing state data into the first memory through the communication bus;
when the time schedule controller receives the opening instruction, the time schedule controller firstly writes opening state data into the first memory through the communication bus, and then informs the microcontroller through the first I/O port that the environment light can be detected, so that the communication bus is occupied by the microcontroller.
Specifically, referring to fig. 4, fig. 4 is a flowchart illustrating an implementation of a control method according to an embodiment of the present invention. As shown in fig. 4, when the state of the Ambient Light Sensor (ALS) is set by the host computer, the upper computer first reads the ALS ON/OFF state in the first memory, i.e., an open or closed state, and when the ALS ON state is read, the state is displayed ON the upper computer, and an ALS OFF control button (corresponding to an ALS OFF control instruction) is provided, when the ALS OFF is clicked, the upper computer sends a corresponding instruction to the time schedule controller through the AUX interface, after the time schedule controller receives the corresponding instruction, sending a pulse signal to the microcontroller through the GPIO port, stopping reading the ALS by the microcontroller after receiving the pulse signal, releasing the communication bus, so that the timing controller writes ALS OFF data into the first memory, and the microcontroller adjusts the working state of the ALS according to the ALS OFF data, namely, does not read the ALS. After the operation is executed, the keys of the ALS ON can be displayed ON the upper computer again, and the previous setting is changed.
Similarly, when reading the ALS OFF state, displaying the state ON the upper computer, providing a control key (corresponding to an ALS ON control instruction) of ALS ON, after clicking the ALS ON, sending a corresponding instruction to the time schedule controller by the upper computer through an AUX interface, writing ALS OFF data into the first memory by the time schedule controller, then sending a pulse signal to the microcontroller through a GPIO port, and after receiving the pulse signal, occupying a communication bus by the microcontroller to read the ALS. Of course, after the operation is performed, the ALS OFF key can be displayed ON the upper computer again to change the previous setting of ALS ON.
In one embodiment, step S2: before the microcontroller adjusts the working state of the ambient light sensor according to the state data in the first memory, the method further comprises the following steps:
the microcontroller acquires the state of a wide and narrow visual angle control signal input by the front end;
when the wide and narrow visual angle control signal is a narrow visual angle, the microcontroller acquires state data corresponding to the control instruction of the ambient light sensor stored in the first memory, and adjusts the working state of the ambient light sensor.
For other details of the embodiment of the control method, reference is made to the description of the above embodiment, which is not repeated herein.
Example four
Referring to fig. 5, fig. 5 is a schematic structural diagram of a display module according to a fourth embodiment of the present invention. As shown in fig. 5, the backlight control device includes an LED driver 15 and the control system according to any of the above embodiments, the LED driver 15 is connected to the microcontroller 11; the microcontroller 11 also receives a first pulse width modulation signal sent by the timing controller 10, and outputs a second pulse width modulation signal to the LED driver 15 according to the first pulse width modulation signal and the detection data of the ambient light sensor 12, so as to set the current output from the LED driver 15 to the LED light string.
Specifically, in the setup phase, the timing controller 10 writes state data corresponding to the ambient light sensor control command into the first memory 13 through the communication bus when receiving the ambient light sensor control command, so as to control the communication state between the microcontroller 11 and the ambient light sensor 12 in the working phase.
When the ambient light sensor 12 is in the off state, that is, when the microcontroller 11 does not read and process the ambient light intensity information of the ambient light sensor 12, the timing controller 10 sends a PWM input signal to the microcontroller 11, and the microcontroller 11 outputs a corresponding PWM output signal to the LED driver 15, so as to set the current output from the LED driver 15 to the LED string.
When the ambient light sensor 12 is in the on state, that is, the microcontroller 11 reads and processes the ambient light intensity information of the ambient light sensor 12, the timing controller 10 sends the PWM input signal to the microcontroller 11, and the microcontroller 11 outputs the corresponding PWM output signal to the LED driver 15 according to the ambient light intensity information, so as to set the current output from the LED driver 15 to the LED light string, thereby realizing the brightness of the automatic adjustment module according to the current ambient light.
Therefore, the backlight control device provided by the embodiment can store the working state of the ambient light sensor set by the user, solve the problem of collocation between the module of the display and the system in the power-off state of the PCBA, and prompt the competitiveness of the product.
EXAMPLE five
Referring to fig. 6, fig. 6 is a schematic structural diagram of a display module according to a fifth embodiment of the present invention. As shown in fig. 6, on the basis of the fourth embodiment, the display module further includes an LED string 16, and the LED string 16 is connected to the LED driver 15. In this embodiment, the display panel may be a display panel with a changeable wide and narrow viewing Angle (i.e. HVA, Hybrid View Angle), and when the display panel is switched to the narrow viewing Angle mode, the brightness of the display module may be automatically adjusted according to the ambient light brightness detected by the Ambient Light Sensor (ALS). In other embodiments, the HVA display panel may not be limited.
The display module should avoid changing the brightness level too fast, because the instant change of the light intensity may cause the backlight brightness of the display module to change unnecessarily, which often causes discomfort to the user. Therefore, when data processing is carried out through the microcontroller, the backlight brightness of the display module is adjusted only after the light intensity deviates from a specific range for a certain time. For example, if the normal light intensity is 180lux, the current of the LED string is adjusted when the light intensity is reduced to below 160lux or increased to above 200lux, and the duration time exceeds several seconds, so as to adjust the brightness of the display module.
For other details of the embodiment of the display module, please refer to the description of the above embodiment, which is not repeated herein.
In summary, the display module provided in this embodiment can realize storing the operating condition of the ambient light sensor set by the user, solve the problem of collocation between the module of the display and the system in the power-off state of the PCBA, and prompt the competitiveness of the product.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Claims (10)
1. A control system is characterized by comprising a time schedule controller, a microcontroller, an ambient light sensor and a first memory;
the time schedule controller is connected with the microcontroller through a communication bus, and the ambient light sensor and the first memory are both mounted on the communication bus;
in the setting stage, after receiving an ambient light sensor control instruction, the timing controller writes state data corresponding to the ambient light sensor control instruction into the first memory through the communication bus, so as to adjust the working state of the microcontroller on the ambient light sensor in the working stage.
2. The control system according to claim 1, wherein the timing controller further comprises a first I/O port, and the timing controller is connected to the microcontroller through the first I/O port, so as to send a notification signal to the microcontroller when the timing controller receives the ambient light sensor control command during the setup phase, so that the microcontroller adjusts the operating state to avoid the timing controller and the microcontroller using the communication bus at the same time.
3. The control system of claim 2, wherein the ambient light sensor control instructions include an on instruction and an off instruction,
when the time schedule controller receives the closing instruction, the time schedule controller firstly informs the microcontroller to stop detecting the ambient light through the first I/O port, releases the communication bus, and then writes closing state data into the first memory through the communication bus;
when the time schedule controller receives the starting instruction, the time schedule controller firstly writes starting state data into the first memory through the communication bus, and then informs the microcontroller through the first I/O port that the detection of ambient light can be started, so that the communication bus is occupied by the microcontroller.
4. The control system of any one of claims 1-3, further comprising a second memory, mounted on the communication bus, for storing data of the timing controller.
5. The control system of claim 4, wherein the communication bus is an I2C bus and the memory is an EEPROM memory.
6. The control system according to claim 1, wherein the microcontroller further includes a wide-narrow viewing angle control signal input terminal, and when the microcontroller receives a narrow viewing angle control signal through the wide-narrow viewing angle control signal input terminal, the microcontroller acquires state data corresponding to the ambient light sensor control instruction stored in the first memory, and adjusts the operating state of the microcontroller on the ambient light sensor.
7. A control method, comprising:
after receiving an ambient light sensor control instruction, the time schedule controller writes state data corresponding to the ambient light sensor control instruction into a first memory through a communication bus;
the microcontroller adjusts the working state of the ambient light sensor according to the state data in the first memory.
8. The control method according to claim 7, characterized by further comprising:
and the upper computer reads the state data from the first memory before sending the control instruction of the ambient light sensor to the time sequence controller so as to keep the state displayed by the upper computer consistent with the state of the ambient light sensor.
9. The control method of claim 8, wherein the ambient light sensor control commands comprise an on command and an off command,
when the time schedule controller receives the closing instruction, the time schedule controller informs the microcontroller to stop detecting the ambient light through a first I/O port, releases the communication bus, and writes closing state data into the first memory through the communication bus;
when the time schedule controller receives the starting instruction, the time schedule controller firstly writes starting state data into the first memory through the communication bus, and then informs the microcontroller through the first I/O port that the detection of ambient light can be started, so that the communication bus is occupied by the microcontroller.
10. A display module comprising an LED string, an LED driver and the control system of any one of claims 1-6, wherein the LED driver is connected to the microcontroller and the LED string is connected to the LED driver;
the microcontroller also receives a first pulse width modulation signal sent by the time sequence controller, and outputs a second pulse width modulation signal to the LED driver according to the first pulse width modulation signal and the detection data of the ambient light sensor so as to set the current output by the LED driver to the LED lamp string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010653713.3A CN111818695B (en) | 2020-07-08 | 2020-07-08 | Control system, method and display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010653713.3A CN111818695B (en) | 2020-07-08 | 2020-07-08 | Control system, method and display module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111818695A true CN111818695A (en) | 2020-10-23 |
| CN111818695B CN111818695B (en) | 2022-12-20 |
Family
ID=72842644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010653713.3A Active CN111818695B (en) | 2020-07-08 | 2020-07-08 | Control system, method and display module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111818695B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112233626A (en) * | 2020-10-29 | 2021-01-15 | 昆山龙腾光电股份有限公司 | Backlight adjusting device, backlight adjusting method and display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107564479A (en) * | 2017-09-12 | 2018-01-09 | 京东方科技集团股份有限公司 | Backlight adjusting method and backlight regulating system |
| CN107808104A (en) * | 2017-11-30 | 2018-03-16 | 北京集创北方科技股份有限公司 | Integrated control device and display system |
| CN107990978A (en) * | 2017-11-22 | 2018-05-04 | 广东欧珀移动通信有限公司 | Environment light detection method, device, storage medium and electronic equipment |
| CN109446144A (en) * | 2018-10-29 | 2019-03-08 | 北京控制与电子技术研究所 | A kind of general purpose I 2C bus control unit for supporting User Agreement |
-
2020
- 2020-07-08 CN CN202010653713.3A patent/CN111818695B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107564479A (en) * | 2017-09-12 | 2018-01-09 | 京东方科技集团股份有限公司 | Backlight adjusting method and backlight regulating system |
| CN107990978A (en) * | 2017-11-22 | 2018-05-04 | 广东欧珀移动通信有限公司 | Environment light detection method, device, storage medium and electronic equipment |
| CN107808104A (en) * | 2017-11-30 | 2018-03-16 | 北京集创北方科技股份有限公司 | Integrated control device and display system |
| CN109446144A (en) * | 2018-10-29 | 2019-03-08 | 北京控制与电子技术研究所 | A kind of general purpose I 2C bus control unit for supporting User Agreement |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112233626A (en) * | 2020-10-29 | 2021-01-15 | 昆山龙腾光电股份有限公司 | Backlight adjusting device, backlight adjusting method and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111818695B (en) | 2022-12-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101378614B (en) | LED lighting kenel control system and method | |
| US7971085B2 (en) | Method and apparatus for supplying power, and display device | |
| JP4593231B2 (en) | Power supply device and liquid crystal display device having the same | |
| TWI547937B (en) | Display backlight adjustment method, display backlight adjustment apparatus and computer program product for adjusting display backlight | |
| JP6184776B2 (en) | Visible light communication system | |
| CN111681615B (en) | Backlight control circuit and backlight control method | |
| US9013370B2 (en) | Display system for meeting room and control method thereof | |
| WO2022022078A1 (en) | Display module, control method and apparatus, electronic device, and storage medium | |
| KR20130122695A (en) | Power conservation | |
| CN111818695B (en) | Control system, method and display module | |
| CN112181502A (en) | OPS computer control method and device of all-in-one machine equipment and storage medium | |
| CN105404209B (en) | A kind of system and method by USB transmission control display screen backlight illumination | |
| CN102004541A (en) | Image display system and method | |
| CN108320721B (en) | Brightness adjusting device and brightness adjusting method thereof | |
| KR100726594B1 (en) | Interface device and interfacing method | |
| US10936514B2 (en) | Control system and control method for controlling memory modules | |
| CN107994925B (en) | Method for communication through power line | |
| CN113721795A (en) | Touch screen control device, touch screen control method and display device | |
| CN111061161A (en) | Double-display panel and intelligent household equipment | |
| US12008181B2 (en) | Electronic device and control method thereof | |
| CN214148048U (en) | Range hood control switching device | |
| CN116867042A (en) | Power consumption control method, system, device and medium | |
| CN113467729B (en) | Electronic device and multi-screen display method | |
| CN220627041U (en) | Data reading circuit, electronic whiteboard and data reading system | |
| CN109144223B (en) | Touch screen clock output method, mobile terminal and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |