CN214587963U - Light modulation device and display device - Google Patents
Light modulation device and display device Download PDFInfo
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- CN214587963U CN214587963U CN202023099660.XU CN202023099660U CN214587963U CN 214587963 U CN214587963 U CN 214587963U CN 202023099660 U CN202023099660 U CN 202023099660U CN 214587963 U CN214587963 U CN 214587963U
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Abstract
The utility model discloses a dimming device and display device. The dimming device of the embodiment of the utility model comprises a light detector for detecting the brightness of the environment light; a memory for storing configuration parameters; and a first port of the micro control unit is connected with the light detector to receive the ambient light brightness, and a second port of the micro control unit is connected with the memory to receive the configuration parameters, wherein the micro control unit obtains a brightness control signal according to the ambient light brightness and the configuration parameters corresponding to the ambient light brightness, and the brightness control signal is used for dimming. According to the utility model discloses dimming device and display device can be applicable to the adjusting luminance of different systems, has promoted the variety of product.
Description
Technical Field
The utility model relates to a show technical field, in particular to dimming device and display device.
Background
The backlight adjusting method of the liquid crystal display device includes analog dimming for adjusting backlight brightness by adjusting an amount of current supplied to each LED, and digital dimming such as Pulse Width Modulation (PWM) dimming for adjusting backlight brightness by adjusting a ratio of switching time of the LEDs.
The dimming devices of the prior art have no versatility. The dimming device and the dimming scheme used in one system are only applicable to the system, but cannot be applied to other systems. Therefore, a new light control device and a display device that can be applied to different systems are desired.
SUMMERY OF THE UTILITY MODEL
In view of the above, an object of the present invention is to provide a light modulation device and a display device, which can be applied to light modulation of different systems, and improve the diversity of products.
According to an aspect of the utility model, a provide a dimming device, include: the optical detector is used for detecting the brightness of the environment light; a memory for storing configuration parameters; and a first port of the micro control unit is connected with the light detector to receive the ambient light brightness, and a second port of the micro control unit is connected with the memory to receive the configuration parameters, wherein the micro control unit obtains a brightness control signal according to the ambient light brightness and the configuration parameters corresponding to the ambient light brightness, and the brightness control signal is used for dimming.
Preferably, the photodetector includes: the acquisition unit is used for detecting the brightness of the environment light; the conversion unit is connected with the acquisition unit to receive the ambient light brightness and convert the ambient light brightness into ambient light data; the comparison unit is connected with the conversion unit to acquire the ambient light data and compares the acquired adjacent ambient light data, wherein the acquisition unit acquires the ambient light brightness according to a fixed frequency detection; and outputting the same ambient light data to the micro control unit when the ambient light data in the set time are the same.
Preferably, the dimming device further includes: a connector for providing the original brightness control signal.
Preferably, the connector is connected with the micro control unit to provide the wide and narrow viewing angle signals to the micro control unit.
Preferably, the dimming device further includes: the logic board is connected with the connector and the micro control unit respectively to receive the original brightness control signal and process the original brightness control signal to obtain a first intermediate brightness control signal; the logic board is connected with the input end of the micro control unit so as to transmit the first intermediate brightness control signal to the micro control unit; and the micro control unit obtains the brightness control signal according to the ambient light brightness, the configuration parameters and the first intermediate brightness control signal.
Preferably, the dimming device further comprises a first resistor; the first end of the first resistor is connected with the logic board; and the second end of the first resistor is connected with the output end of the micro control unit.
Preferably, the light detector is connected with the micro control unit through a data line and a control line respectively so as to transmit the ambient light brightness to the micro control unit.
Preferably, the memory is connected to the data line and the control line, respectively, to transmit the configuration parameters to the micro control unit.
Preferably, the dimming device further includes: and the light source is connected with the micro control unit to receive the brightness control signal and realize dimming under the control of the brightness control signal.
According to another aspect of the present invention, there is provided a display device comprising the display device as described above.
According to the utility model discloses dimming device and display device, little the control unit obtains luminance control signal according to ambient light brightness and configuration parameter, can be applicable to the not dimming of same system, has promoted the variety of product.
According to the dimming device and the display device provided by the embodiment of the utility model, the ambient light brightness is obtained according to the fixed frequency detection; when the ambient light brightness within the set time is the same, the ambient light data is output to the micro control unit to adjust the light, so that the accuracy of the light adjustment is ensured.
According to the utility model discloses dimming device and display device, line and space have been practiced thrift to at least some data lines of light detector and memory sharing and/or control line.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a dimming device according to a first embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a dimming device according to a second embodiment of the present invention.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. Numerous specific details of the invention, such as structure, materials, dimensions, processing techniques and techniques of components, are set forth in the following description in order to provide a more thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
Fig. 1 shows a schematic structural diagram of a dimming device according to a first embodiment of the present invention, as shown in fig. 1, the dimming device according to the first embodiment of the present invention includes a micro control unit 10, a light detector 20 and a memory 30.
Specifically, the light detector 20 is connected to the external environment and is used for detecting the ambient light intensity. Optionally, the light detector 20 detects the current ambient light intensity of the external environment, for example, the current ambient light intensity is detected in real time according to a certain frequency.
The memory 30 is used to store configuration parameters.
A first port of the micro control unit 10 is connected to the light detector 20 to receive the ambient light level; a second port of the mcu 10 is connected to the memory 30 for receiving configuration parameters; the micro control unit obtains a brightness control signal according to the ambient light brightness and the configuration parameters corresponding to the ambient light brightness, and the brightness control signal is used for dimming.
In an alternative embodiment of the present invention, the mcu 10 selects and determines at least a part of the configuration parameters from the memory 30 according to the received ambient light level, i.e. the configuration parameters corresponding to the received ambient light level. The mcu 10 obtains a brightness control signal according to the ambient light brightness and the configuration parameters corresponding to the ambient light brightness. The brightness control signal is used for dimming of the dimming device.
In an optional embodiment of the present invention, the light modulation device further comprises a light source. The light source is connected to the micro control unit 10 to receive the brightness control signal and to perform dimming under the control of the brightness control signal.
Fig. 2 shows a schematic structural diagram of a second light modulation device according to the present invention, and as shown in fig. 2, the second light modulation device according to the present invention includes a micro control unit 10, a light detector 20, a memory 30, a connector 40, and a logic board 50.
Specifically, a Micro Controller Unit (MCU) 10 obtains a brightness control signal according to the ambient light brightness. Optionally, the micro control unit 10 obtains a brightness control signal according to the ambient light brightness and the configuration parameters. Alternatively, the dimming device adjusts the backlight brightness by adjusting a ratio of a switching time of the light source (e.g., LED) using Pulse Width Modulation (PWM) dimming, and the brightness control signal obtained by the micro control unit 10 is PWMO (Pulse Width Modulation output) data. Alternatively, the dimming device employs analog dimming, and adjusts the backlight brightness by adjusting the amount of current supplied to each light source, and the brightness control signal obtained by the micro control unit 10 is a current value.
The light detector 20 is connected to the micro control unit 10 for detecting the ambient light level. Optionally, the light detector 20 detects the current ambient light intensity, for example, at a certain frequency, and detects the current ambient light intensity in real time. Optionally, the light detector 20 is connected to the micro-control unit 10 via a Data line (SDA; Data signal line such as I2C bus) and a control line (SCL), respectively, to transmit the detected ambient light level to the micro-control unit 10.
The memory 30 is used to store configuration parameters. Optionally, the memory 30 is a 2K memory (2K EEPROM) for storing configuration parameters required for outputting a target under private (private). The memory 30 is connected to the microcontroller unit 10 via a Data line (SDA; Data signal line, for example the I2C bus) and a control line (SCL) in order to transmit the stored configuration parameters to the microcontroller unit 10. Optionally, a memory is connected to the data and control lines, respectively, connected to the light detector to transmit configuration parameters to the micro control unit 10. The light detector 20 shares at least a portion of the data lines and/or control lines with the memory 30.
The connector 40 is connected to a front-end device (system) for providing the original brightness control signal. Alternatively, the original luminance control signal is PWMI (Pulse Width Modulation In) data. Optionally, the connector 40 is connected with the micro control unit 10 to provide an HVA (Hybrid Viewing Angle) signal to the micro control unit 10.
A logic board (T-CON)50 is connected to the connector 40 and the micro control unit 10, respectively. The logic board 50 is connected to the connector 40 to receive the original brightness control signal and process the original brightness control signal to obtain a first intermediate brightness control signal. The logic board 50 is connected to an input of the micro control unit 10 to transmit a first intermediate brightness control signal to the micro control unit 10. The micro control unit 10 obtains a brightness control signal according to the ambient light brightness, the configuration parameter and the first intermediate brightness control signal. Optionally, the micro control unit 10 adjusts the first intermediate brightness control signal according to the ambient light brightness and the configuration parameter, so as to obtain the brightness control signal. Alternatively, the original brightness control signal and the first intermediate brightness control signal are both PWM (pulse width modulation) signals, and the duty ratio and the frequency of the two PWM signals are the same. Optionally, a logic board 50 is connected to the output of the micro control unit 10. Optionally, the dimming device further comprises a first resistor 60, and a first end of the first resistor 60 is connected to the logic board 50. A second terminal of the first resistor 60 is connected to an output of the microcontroller unit 10. The logic board 50 is connected to the output of the microcontroller unit 10 via a first resistor 60, the resistance value of the first resistor 60 being, for example, 49.9k Ω.
In an optional embodiment of the present invention, the dimming device outputs the final brightness control signal according to the HVA signal. When the HVA signal is a first signal (for example, high level), the mcu 10 selects the configuration parameters to configure and output the brightness control signal, which is output as the final brightness control signal. When the HVA signal is the second signal (for example, low level), the first intermediate luminance control signal output from the logic board 50 is output as the final luminance control signal.
In an alternative embodiment of the present invention, the light detector 20 comprises an acquisition unit, a conversion unit and a comparison unit. The collecting unit is used for detecting the ambient light brightness, for example, the ambient light brightness is detected and obtained according to a fixed frequency. The conversion unit is connected with the acquisition unit to receive the ambient light brightness and convert the ambient light brightness into ambient light data. The comparing unit is connected to the converting unit to obtain the ambient light data, and compares the obtained adjacent ambient light data, and outputs the ambient light data to the micro control unit 10 when the ambient light data in the set time is the same. Alternatively, it is defined that the light detector 20 is initialized once every 250ms (and possibly other times), the brightness (ambient light level) data is read once, the data is read 4 times in 2s, the data is updated 4 times when the data is the same, and the same ambient light data is transmitted to the micro control unit 10.
In an alternative embodiment of the present invention, the micro control unit 10 includes a computing unit for computing (target PWMO duty computing module), and the ambient light data obtained by the light detector 20 is transmitted to the computing unit.
In an alternative embodiment of the present invention, the logic board 50 obtains the original brightness control signal through the connector 40. The logic board 50 captures the original brightness control signal, and if the original brightness control signal is changed, transmits the changed original brightness control signal to the calculation unit of the micro control unit 10. Alternatively, the logic board 50 continuously acquires the original brightness control signal, and if the original brightness control signal is changed, and the logic board 50 continuously acquires the original brightness control signals for a set number of times (for example, three times) that are the same, the changed original brightness control signal is transmitted to the computing unit of the micro control unit 10.
In an alternative embodiment of the present invention, the configuration parameters stored in the memory 30 include Extended Display Identification DATA (EDID). The micro control unit 10 reads the duty ratio and the brightness from the EDID and calculates the maximum brightness. Alternatively, the micro control unit 10 reads the duty ratio, the brightness of the Privary PWMI step10 from the EDID and calculates the maximum brightness. Optionally, the mcu 10 reads at least one of the duty ratio values of each stage, the division of the ambient light brightness range, the maximum module brightness required for different ambient light brightness ranges, the module brightness variation speed when the corresponding PWMI step varies in different ambient light brightness ranges, and the variation speed of different duty ratio stages when PWMO is output from the memory 30.
In an optional embodiment of the present invention, the micro control unit 10 obtains the brightness control signal through comparison calculation according to the newly obtained PWMI, the external environment light, and the configuration parameter. Optionally, a calculation unit in the micro control unit 10 performs the comparison calculation.
In the utility model discloses an optional embodiment, the luminance control signal that will have output at present and the luminance control signal that will be exported (calculation is obtained) are compared, select the corresponding PWMO rate of change, then begin to change PWMO gradually, until gradually change to the luminance control signal that the calculation was obtained.
In an optional embodiment of the present invention, the dimming device outputs the final brightness control signal according to the HVA signal. When the HVA signal is a first signal, for example, high (private), the micro control unit 10 reads the current ambient light brightness obtained by the light detector 20, and reads the configuration parameters (private related parameters) in the memory 30; the micro control unit 10 calls a calculation method of the brightness control signal, and performs calculation according to the configuration parameter (privacy parameter), the privacy calculation method, and the ambient light brightness. The micro control unit 10 outputs the calculated brightness control signal (private corresponds to PWMO). When the HVA signal is a second signal, for example, low (shading), the PWMO output of the mcu 10 is turned off, and the first intermediate brightness control signal (T-PWM) output from the logic board 50 is provided to the rear end (the output end of the dimming device) through the first resistor 60.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.
In accordance with the embodiments of the present invention as set forth above, these embodiments are not exhaustive and do not limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best utilize the invention and its various embodiments with various modifications as are suited to the particular use contemplated. The present invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. A dimming device, comprising:
the optical detector is used for detecting the brightness of the environment light;
a memory for storing configuration parameters; and
a micro-control unit, a first port of the micro-control unit is connected with the light detector to receive the ambient light brightness, a second port of the micro-control unit is connected with the memory to receive the configuration parameters,
the micro control unit obtains a brightness control signal according to the ambient light brightness and the configuration parameter corresponding to the ambient light brightness, and the brightness control signal is used for dimming;
the dimming device further includes:
a connector for providing the original brightness control signal.
2. The dimming device of claim 1, wherein the light detector comprises:
the acquisition unit is used for detecting the brightness of the environment light;
the conversion unit is connected with the acquisition unit to receive the ambient light brightness and convert the ambient light brightness into ambient light data; and
a comparison unit connected with the conversion unit to acquire the ambient light data and compare the acquired adjacent ambient light data,
the acquisition unit detects and acquires the ambient light brightness according to a fixed frequency;
and outputting the same ambient light data to the micro control unit when the ambient light data in the set time are the same.
3. The dimming apparatus of claim 1, wherein the connector is connected to the micro control unit to provide the wide and narrow viewing angle signals to the micro control unit.
4. The dimming device of claim 1, further comprising:
a logic board connected with the connector and the micro control unit respectively,
the logic board is connected with the connector to receive the original brightness control signal and process the original brightness control signal to obtain a first intermediate brightness control signal;
the logic board is connected with the input end of the micro control unit so as to transmit the first intermediate brightness control signal to the micro control unit;
and the micro control unit obtains the brightness control signal according to the ambient light brightness, the configuration parameters and the first intermediate brightness control signal.
5. The dimming device of claim 4, further comprising a first resistor;
the first end of the first resistor is connected with the logic board;
and the second end of the first resistor is connected with the output end of the micro control unit.
6. The dimming apparatus of claim 1, wherein the light detector is connected to the micro-control unit via a data line and a control line, respectively, to transmit the ambient light level to the micro-control unit.
7. The dimming apparatus of claim 6, wherein the memory is connected to the data line and the control line, respectively, to transmit the configuration parameters to the micro control unit.
8. The dimming device of claim 1, further comprising:
and the light source is connected with the micro control unit to receive the brightness control signal and realize dimming under the control of the brightness control signal.
9. A display device, comprising:
the dimming device of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023099660.XU CN214587963U (en) | 2020-12-21 | 2020-12-21 | Light modulation device and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023099660.XU CN214587963U (en) | 2020-12-21 | 2020-12-21 | Light modulation device and display device |
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| CN214587963U true CN214587963U (en) | 2021-11-02 |
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| CN202023099660.XU Active CN214587963U (en) | 2020-12-21 | 2020-12-21 | Light modulation device and display device |
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