WO2019237980A1

WO2019237980A1 - Three primary color light-based display screen, display device, and method for adjusting brightness of three primary colors

Info

Publication number: WO2019237980A1
Application number: PCT/CN2019/090178
Authority: WO
Inventors: 林健源; 张冬灿
Original assignee: 深圳Tcl新技术有限公司
Priority date: 2018-06-12
Filing date: 2019-06-05
Publication date: 2019-12-19
Also published as: CN108806618B; CN108806618A

Abstract

Three primary color light-based display screen (100), a display device, and a method for adjusting brightness of three primary colors. The three primary color light-based display screen (100) comprises: a three primary color light adjustment circuit (10) and a backlight module (20); the backlight module (20) comprises three primary color light bars (30) for emitting light in three primary colors; the three primary color light adjustment circuit (10) comprises a driving circuit (101), a main controller (102), and sensors (103); the sensors (103) respectively acquires the luminous flux intensity of light in three primary colors emitted by the three primary color light bars (30); the main controller (102) determines the actual brightness ratio of the light in three primary colors according to the luminous flux intensity and a preset algorithm, and outputs duty cycle adjustment signals according to a result of comparison with a preset brightness ratio so as to drive the three primary color light bars (30). The current brightness of the light in three primary colors is detected by the main controller (102), and the actual brightness ratio of the light in three primary colors is calculated; when the actual brightness ratio is inconsistent with the preset brightness ratio, driving signals are adjusted to drive the three primary color light bars (30) to adjust the current brightness and perform display, so that color cast is eliminated.

Description

Display screen with three primary colors, display device and method for adjusting brightness of three primary colors Ranch

Technical field

The present application relates to the technical field of display screens, and in particular, to a display screen with three primary colors, a display device, and a method for adjusting the brightness of the three primary colors.

Background technique

The LCD TV display can adopt the time-mixing method, which uses the visual inertia of the human eye. For medium-brightness light stimulation, the visual retention time is about 0.05 to 0.2 seconds, which is the response time of the optic nerve on the retina. The light appears at the same place on the same surface, and the human eye will feel that the three primary colors of light appear at the same time, and have the effect of adding the three primary colors.

Using this principle: the color LCD display can be made into a red, green, and blue (Red \ Green \ Blue, R \ G \ B) three-primary light source, and the LCD panel can omit the color filter film and only pass the thin film transistor (Thin Film Transistor (TFT) switch controls the strength of the three primary color lights to achieve the effect of color mixing and reduce costs. This method sequentially drives and lights in the order of R \ G \ B. The R \ G \ B primary color lamp control signal needs to be connected to the LCD panel field. The frequency control signals are synchronized and need to be synchronized with each other, and at the same time, the interval timing is field frequency time. It can be seen that white light (W) is obtained by adding the three primary colors of red (R), green (G), and blue (B), and their luminous flux ratio is ΦR: ΦG: ΦB = 1: 4.5907: 0.0601, but R, G, B Tri-color lamps have different degrees of light decay. R decays faster than G, and G decays faster than B. Therefore, in the long-term use process, color cast may occur.

Application content

The main purpose of the present application is to provide a three-primary-color display screen, a display device, and a method for adjusting the brightness of the three-primary color, in order to solve the technical problem that the time-mixing method of the display screen of the existing display device is prone to color cast.

In order to achieve the above object, the present application provides a three-primary-color display screen. The three-primary-color display screen includes: a three-primary-color adjustment circuit and a backlight module. The backlight module includes a three-primary-color light emitting device. A three-primary-color light bar, the three-primary-color light adjusting circuit includes a driving circuit, a main controller, and a sensor;

The sensors are configured to separately collect light flux intensities of three primary color lights emitted by the three primary color light bars, and output the light flux intensities to the main controller;

The main controller is configured to determine the actual brightness ratio of the three primary colors of light according to the luminous flux intensity and a preset algorithm, compare the actual brightness ratio with a preset brightness ratio, and output a duty cycle adjustment signal according to the comparison result to The driving circuit;

The driving circuit is configured to drive the three primary color light bars according to the duty cycle adjustment signal.

Optionally, the main controller is further configured to convert the intensity of the light flux into the intensity of light, and convert the intensity of the light into the brightness of the light, and obtain the actual brightness ratio of the three primary color lights by the brightness of the light.

Optionally, the main controller is further configured to obtain the sphericity of the liquid crystal display, and use the ratio of the luminous flux intensity to the sphericity as the light intensity of the three primary colors of light, and the ratio of the light intensity to the display area as the illumination. brightness.

Optionally, the three-primary-color display screen further includes a voltage input circuit and an operational amplifier circuit;

An output terminal of the sensor is connected to a first input terminal of the operational amplifier circuit, an input terminal of the voltage input circuit is connected to a power source, and an output terminal of the voltage input circuit is connected to a second input terminal of the operational amplifier circuit. An output terminal of the operational amplifier circuit is connected to the main controller.

Optionally, the three-primary-color display screen further includes a movement board, and the movement board includes a dimming control signal output terminal, an enable signal output terminal, a power output terminal, and a first ground terminal. The device includes a dimming control signal input terminal, an enable signal input terminal, a power input terminal, and a second ground terminal. The dimming control signal output terminal is connected to the dimming control signal input terminal, and the enable signal output terminal is connected. The enable signal input terminal, the power output terminal is connected to the power input terminal, and the first ground terminal is connected to the second ground terminal.

Optionally, the main controller is further configured to divide the dimming control signal and output three dimming control signals to the driving circuit.

Optionally, the three-primary-color display screen further includes a logic board, the logic board includes a liquid crystal driving output terminal, the main controller further includes a liquid crystal driving input terminal, and the liquid crystal driving output terminal is connected to the liquid crystal driving Input

The main controller is further configured to synchronize the three-way dimming control signal with the liquid crystal driving signal of the liquid crystal driving input terminal and output the same to the driving circuit.

Optionally, the driving circuit is further configured to boost the connected power supply voltage to a preset driving voltage, and output the preset driving voltage to the main controller.

Optionally, the driving circuit is connected to the three primary color light bars through a preset interface.

In addition, in order to achieve the above object, the present application also proposes a display device. The display device includes a device body and a three-primary-color display screen as described above.

In addition, in order to achieve the above object, the present application also proposes a method for adjusting the brightness of the three primary colors. The method for adjusting the brightness of the three primary colors includes:

Step S10, detecting a parameter state of the three primary colors of light;

Step S20: Calculate the actual brightness ratio of the three primary lights according to the parameter status of the three primary lights;

Step S30, then comparing the actual brightness ratio with a preset brightness ratio;

In step S40, the width of the driving duty ratio of the three primary color light bars is adjusted according to the comparison result.

In the present application, the main controller detects the current brightness of the three primary color light emitted by the three primary color light bar, and calculates the actual brightness ratio of the three primary color light. When the actual brightness ratio is not consistent with the preset brightness ratio, it is driven by adjusting the driving signal. The three-primary color light bar adjusts the current brightness and displays it so that the actual brightness ratio of the three-primary color light reaches a preset brightness ratio, thereby ensuring a good light mixing effect and further eliminating the phenomenon of color cast.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solutions in the embodiments of the present application or the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structure shown in these drawings without paying creative labor.

1 is a schematic structural diagram of an embodiment of a three-primary-color display screen according to the present application;

FIG. 2 is a schematic diagram of the implementation principle of the time-mixed liquid crystal backlight module of the present application; FIG.

3 is a schematic flowchart of a method for automatically adjusting brightness of three primary colors according to the present application;

4 is a schematic structural diagram of another embodiment of a three-primary-color display screen of the present application;

FIG. 5 is a schematic structural diagram of a light intensity detection circuit for a display screen of three primary colors of the present application; FIG.

FIG. 6 is a functional module diagram of an embodiment of the main controller of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

Label	name	Label	name
100	Tri-primary light display	30	Tricolor light bar
10	Tri-primary light adjustment circuit	40	Voltage input circuit
20	Backlight module	50	Operational amplifier circuit
101	Drive circuit	60	Movement board
102	Master controller	70	Logic board
103	sensor

The implementation, functional characteristics and advantages of the purpose of this application will be further described with reference to the embodiments and the drawings.

detailed description

In the following, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back, etc.) in the embodiment of the present application, the directional indication is only used to explain in a specific posture (as shown in the accompanying drawings) (Shown) the relative positional relationship, movement, etc. of the components below, if the specific posture changes, the directional indicator will change accordingly.

In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for description purposes, and cannot be understood as instructions or hints Its relative importance or implicitly indicates the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on those that can be realized by a person of ordinary skill in the art. When the combination of technical solutions conflicts or cannot be achieved, such a combination of technical solutions should be considered non-existent. Is not within the scope of protection claimed in this application. Ranch

The present application provides an embodiment of a three-primary-color display screen 100.

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of an embodiment of a three-primary-color display screen 100. In the embodiment of the present application, the three-primary-color display screen 100 includes a three-primary-color adjustment circuit 10 and a backlight module 20. The backlight module 20 includes a three-primary-color light bar 30 for emitting three-primary-color light. The three-primary-color light adjusting circuit 10 includes a driving circuit 101, a main controller 102, and a sensor 103. The sensor 103 is configured to collect three-primary-color light emitted by the three-primary-color light bar 30, and collect data of the collected three-primary-color light. Output to the main controller 102, the three output terminals of the main controller 102 are respectively connected to the three input terminals of the driving circuit 101, and the three output terminals of the driving circuit 101 are respectively connected to the three primary color lights Three control ends of the strip 30.

It should be noted that the three-primary-color display screen 100 is provided with a three-primary-color adjustment circuit 10, and the three-primary-color adjustment circuit 10 can be used to adjust in real-time when the brightness of the light on the three-primary color light bar 30 is faded. The brightness of the light on the three primary color light bar 30 ensures that the light flux ratio of the three primary color light emitted by the three primary color light bar 30 reaches a preset optimal ratio value, for example, ΦR: ΦG: ΦB = 1: 4.5907: 0.0601, to avoid The light on the three-primary color light bar 30 is subject to color decay.

As shown in Figure 2, the principle of the time-mixing method of the liquid crystal backlight module is to remove the filter film of the LCD screen and provide R \ G \ B three primary colors of light from the backlight. In order to achieve the principle of three primary colors, R \ G \ B The three primary color light sources must be turned on in sequence and only a single color of light passes through each time, so the backlight control frequency and the new LCD screen must be three times the refresh rate of the original LCD screen. The R \ G \ B primary color light control signal and the LCD panel field The frequency control signals are synchronized and kept in sync with each other, while the interval timing with each other is the field frequency time; STV is the LCD drive control signal, PWMR \ PWMG \ PWMB is the backlight R \ G \ B three-primary light source drive control signal, and the middle arrow duty cycle is adjusted to control the backlight brightness.

The sensors 103 are configured to separately collect light flux intensities of the three primary color lights emitted by the three primary color light bars 30 and output the light flux intensities to the main controller 102.

It can be understood that the sensor 103 may be the light sensor 103 or other types of sensors 103, which is not limited in this embodiment. In this embodiment, the light sensor 103 is used as an example for description. The sensors 103 are respectively arranged on the three primary color light bars 30, so that the light parameters of the three primary color lights emitted from the three primary color light bars 30 can be collected in real time, and the collected light parameters are output to the main controller 102, which can monitor the three primary lights in real time. The light state of the three primary color lights emitted from the primary color light bar 30.

As shown in FIG. 1, three sensors 103 are added to the R / G / B three-color backlight module 20 to detect the light intensity of the R / G / B three-color light emitted by the three color bars of R / G / B. Among them, the sensors 103 respectively provided on the three primary color light strips, and the sensors 103 output the detected light intensity data of the three primary color light emitted by the three color strips of R / G / B to the main controller 102. Three input / output (In / Out) ports of the receiver 102 receive data output from the sensor 103, thereby implementing data interaction with the sensor 103.

The main controller 102 is configured to determine the actual brightness ratio of the three primary colors of light by the converted luminous flux intensity and a preset algorithm, compare the actual brightness ratio with the preset brightness ratio, and output a duty cycle adjustment according to the comparison result. A signal is sent to the driving circuit 101.

In a specific implementation, the main controller 102 adjusts the duty cycle through three I / O ports of PWMR / PWMG / PWMB to adjust the brightness of the actual R / G / B three primary color lights, thereby achieving a white display.

As shown in FIG. 3, the method for automatically adjusting the brightness of the three primary colors. First, step S10, the parameter status of the three primary colors is detected by the sensor 103, and step S20, the actual brightness ratio of the three primary colors is calculated according to the parameter status of the three primary colors. In step S30, the actual brightness ratio is compared with the preset brightness ratio. In step S40, the width of the driving duty ratio of the three-primary color light bar is adjusted according to the comparison result, thereby adjusting the brightness of the three-primary color light, and solving the long-term use of R / G / The problem of color cast caused by the inconsistent light decay of the three primary colors of B.

The driving circuit 101 is configured to drive the three primary color light bars 30 for displaying according to the duty cycle adjustment signal.

It should be noted that the driving circuit 101 may be provided in the main controller 102 or outside the main controller 102, and is connected to the driving circuit 101 by adjusting the driving signal of the main controller 102. The three primary color light bars 30 drive the three primary color lights on the three primary color light bars 30 to perform corresponding brightness display.

It can be understood that the three primary color light bars 30 may be provided in the backlight module or outside the backlight module, which is not limited in this embodiment. In this embodiment, the The backlight module is used as an example for description, and the display screen may be a light emitting diode (Light Emitting Diode). The Emitting Diode (LED) display can also be a liquid crystal (Liquid Crystal Display, LCD) display, which is not limited in this embodiment.

In the technical solution provided in this embodiment, the photometric information of the three primary color light emitted by the three primary color light bar 30 is collected by the sensor 103, and the main controller 102 calculates the actual luminance ratio of the three primary color light by using the photometric information of the three primary color light output by the sensor 103. When the actual brightness ratio is inconsistent with the preset brightness ratio, the three primary color light bars 30 are adjusted by the driving signal to adjust the current brightness and display.

Referring to FIG. 4, FIG. 4 is a schematic structural diagram of another embodiment of a three-primary-color display screen 100. The main controller 102 is further configured to convert the intensity of light flux into light intensity, and convert the intensity of light into light intensity. , To obtain the actual brightness ratio of the three primary colors of light by the brightness of the light.

It should be noted that the signal received by the sensor 103 is the luminous flux intensity, and the ratios of the R \ G \ B luminous flux intensity are ΦR: ΦG: ΦB. The main controller 102 converts the calculation of the luminous flux intensity into the light intensity, and uses I It means that the unit is cd and Candela. According to the formula I = Φ / Sr, where Sr is the unit sphere, so IR = ΦR / Sr, IG = ΦG / Sr, IB = ΦB / Sr.

Further, the main controller 102 is further configured to obtain the sphericity of the liquid crystal display, and use the ratio of the luminous flux intensity to the sphericity as the light intensity of the three primary colors of light, and the ratio of the light intensity to the display area as the illumination. brightness.

It can be understood that the white color of the LCD screen is composed of three colors: red, green, and blue. The unit is cd / m ^ 2, that is, nit. The corresponding brightness is expressed by Lvr, Lvg, and Lvb, respectively. By the formula Lvr = IR / S = ΦR / (Sr * S), Lvg = IG / S = ΦG / (Sr * S), Lvb = IB / S = ΦB / (Sr * S) Calculate the brightness, where S is the area of the display and the unit is m ^ 2, in order to keep the white color of the LCD screen constant, the brightness ratio of red, green and blue needs to be kept constant, so: Lvr: Lvg: Lvb = 1: 4.5907: 0.0601, it can be seen that Lvr: Lvg: Lvb = 1: 4.5907: 0.0601 is The preset brightness ratio may also be other brightness ratios. This embodiment does not limit this. The brightness ratio of the actual three primary colors is calculated by the above calculation formula. The actual brightness ratio and Lvr: Lvg: Lvb = 1: 4.5907: 0.0601. The brightness ratios of the three primary colors are compared to determine whether there is a phenomenon of color decay in the three primary colors, and the brightness of the three primary colors is adjusted through the judgment result, thereby realizing the detection of the brightness through the luminous flux parameters and improving the flexibility of the three primary color light detection.

Further, the three-primary-color display screen 100 further includes a voltage input circuit 40 and an operational amplifier circuit 50;

An output terminal of the sensor 103 is connected to a first input terminal of the operational amplifier circuit 50, an input terminal of the voltage input circuit 40 is connected to a power source, and an output terminal of the voltage input circuit 40 is connected to a first input terminal of the operational amplifier circuit 50. Two input terminals, and the output terminal of the operational amplifier circuit 50 is connected to the main controller 102.

As shown in the schematic diagram of the structure of the light intensity detection circuit shown in FIG. 5, in this embodiment, a light intensity detection circuit with a green wavelength of 492 to 577 nm is used as an example, but it is not limited to green light, but also red light, etc. No restrictions. The light intensity detection circuit is mainly composed of a voltage input circuit 40 composed of ST232 and an adjustment circuit, and an operational amplifier circuit 50 composed of a TL0832CD chip, where D1 is a green light sensor 103, and the voltage input circuit 40 converts the input VCC into an operation. The VCC + and VCC- required by the amplifier. The operational amplifier circuit 50 amplifies and outputs the voltage detected by the D1 green light sensor 103 to P1. P1 is an output connection circuit connected to an external circuit, such as the main controller 102. In this embodiment, The connection to the main controller 102 is taken as an example for description. In addition to the ST232 and TL0832CD chips, other chips that implement the same or similar functions may be used, which is not limited in this embodiment.

In specific implementation, ST232 is connected to the input voltage VCC and GND, C6 and C7 rectify the input voltage, ports 1 and 3 on ST232 are connected to capacitor C19, and ports 4 and 5 on ST232 are connected to capacitor C16. For rectification, ports 2 and 6 on ST232 are connected to an adjustment circuit. The adjustment circuit includes resistors R8, R9, R10, and R11 connected in series. One end of R8 is connected to port 2 on ST232, and the other of R8 is One end is connected to one end of R10, the other end of R10 is connected to one end of R11, the other end of R11 is one end of R9, the other end of R9 is port 6 on ST232, and the capacitors C4 and C5 are connected in parallel. , C8, C9, C10, C11, C12, C13, C14, C15, C17, and C18. Port 2 on ST232 is connected to one end of C10, the other end of C10 is one of C5, and the other end of C5 is on ST232. Port 6, port 2 on ST232 is connected to one end of C4, the other end of C4 is one end of C18, the other end of C18 is port 6 on ST232, one end of C8 is connected to the other end of R8, the The other end of C8 is connected to one end of C11, and the other end of C11 is connected to one end of R9. One end of C9 is connected to one end of R10, the other end of C9 is connected to one end of C12, the other end of C12 is connected to one end of R9, and one end of C15 is connected to the other end of R10, The other end of the C15 is connected to one end of the C13, the other end of the C13 is connected to one end of the R11, one end of the C17 is connected to the other end of the R10, and the other end of the C17 is connected to the C14 One end, the other end of the C14 is connected to one end of the R11, and outputs voltages VCC + and VCC-.

The operational amplifier circuit includes a TL082CD chip. The anode of the light sensor D1 is connected to the sampling resistor R3 and the divided voltage R2. The cathode of the light sensor D1 is connected to one end of R1. The other end of R1 is connected to port 1 of the TL082CD chip. One end of R1 is also connected to one end of C1, the other end of C1 is connected to one end of C2, the other end of C2 is connected to port 1 of the TL082CD chip, one end of C3 is connected to the cathode of D1, and the other end of C3 is connected to the port of TL082CD chip. 1. One end of R4 is connected to the other end of R1, the other end of R4 is grounded, one end of R12 is connected to port 1 of the TL082CD chip, the other end of R12 is connected to one end of R6, and the other end of R6 is connected to port 6 of the TL082CD chip. Port 2 is connected to the cathode of D1, port 3 of the TL082CD chip is grounded, port 4 of the TL082CD chip is connected to VCC-, port 8 of the TL082CD chip is connected to VCC +, port 5 of the TL082CD chip is grounded, and port 6 of the TL082CD chip is connected to one end of R7. The other end of R7 is connected to port 7 of the TL082CD chip. Port 7 of TL082CD chip is connected to one end of R5, the other end of R5 is grounded, and the sampling voltage SIGNAL-OUT is output.

Further, the three-primary-color display screen 100 further includes a movement plate 60, which includes a dimming control signal output terminal, an enable signal output terminal, a power output terminal, and a first ground terminal. The main controller 102 includes a dimming control signal input terminal, an enable signal input terminal, a power input terminal, and a second ground terminal. The dimming control signal output terminal is connected to the dimming control signal input terminal and the enable signal. An output terminal is connected to the enable signal input terminal, the power output terminal is connected to the power input terminal, and the first ground terminal is connected to the second ground terminal.

Further, the main controller 102 is further configured to perform division processing on the dimming control signal and output three dimming control signals to the driving circuit 101.

Further, the three-primary-color display screen 100 further includes a logic board 70, the logic board 70 includes a liquid crystal driving output terminal, the main controller further includes a liquid crystal driving input terminal, and the liquid crystal driving output terminal is connected to the LCD drive input;

The main controller 102 is further configured to synchronize the three-way dimming control signal with the liquid crystal driving signal of the liquid crystal driving input terminal and output the same to the driving circuit 101.

As shown in the functional block diagram of the master controller shown in FIG. 6, in this embodiment, the driving circuit U1 has several input and output interfaces, wherein the two input interfaces are respectively connected to the first ground terminal of the movement board and Power output terminal, four output interfaces are connected to the LED +, LEDR, LEDG and LEDB of the three primary color light strips 30 respectively. The movement board 60 includes a dimming control signal output terminal, an enable signal output terminal, a power output terminal and a first A ground terminal. The main controller 102 includes a dimming control signal input terminal, an enable signal input terminal, a power input terminal, and a second ground terminal. The dimming control signal output terminal is connected to the dimming control signal input terminal. The enable signal output terminal is connected to the enable signal input terminal, the power output terminal is connected to the power input terminal, and the first ground terminal is connected to the second ground terminal.

The movement board 60 includes a power output terminal 24v and a dimming control signal output terminal PDIM, which represents a pulse width modulation dimming control signal and an enable signal output terminal, and BLON represents a backlight enable control signal and a first ground terminal, GND Display input. The logic board 70 includes a liquid crystal drive output terminal and outputs a control signal STV. STV indicates a field frequency signal input. PDIM, STV, and BLON are all input to the main controller U2. BLON is used to control the main controller U2 to enable the work. , The high-level master U2 works, the low-level master U2 does not work, the STV field frequency signal, after receiving the main controller U2, the PDIM dimming control signal is processed to synchronize with it, and the frequency remains the same as the STV, According to the processed PDIM signal, the main controller U2 refers to the PDIM signal processing to output three PWM numbers, which are used to individually control the turning on and brightness adjustment of the R \ G \ B three primary color light bar 30 light sources, which are expressed as PWMR \ PWMG \ PWMB The above three PWM control signals need to be synchronized, have the same frequency, and are spaced from each other. The main controller U2 processes and outputs PWMR \ PWMG \ PWMB to the drive circuit U1, which is connected to the drive circuit through a preset interface. The three primary color light bar 30 . The driving circuit U1 can control the voltage R \ G \ B by increasing the duty cycle. The LED three-primary color light bar 30 switches and brightness, and the control signal of the three-primary color light bar 30 is LEDR \ LEDG \ LEDB, so as to ensure that the liquid crystal display of the three-primary color light bar 30 works normally.

It should be noted that the R \ G \ B The LED three-primary color light bar 30 is connected through a common anode, and may also be connected in other forms, which is not limited in this embodiment.

Further, the driving circuit 101 is further configured to boost the connected power supply voltage to a preset driving voltage and output the preset driving voltage to the main controller 102.

In this embodiment, the driving circuit 101 boosts the input voltage by 24V, which satisfies the driving voltage required for the light bar of the actual complete solution, so as to maintain the normal operation of the components in the system. The driving circuit 101 and the main controller 102 may be OZ9909 and MSP430 can also be other chips that can implement the same or similar functions, which is not limited in this embodiment.

The present application also proposes a display device, which includes the three-primary-color display screen 100 as described above. For a specific structure of the three-primary-color display screen 100, refer to the foregoing embodiment. It has all the technical solutions of all the above embodiments, and therefore has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated one by one here.

The above are only optional embodiments of the present application, and thus do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of the application, or directly or indirectly applied to other related technologies The fields are equally covered by the patent protection scope of this application.

Claims

A three-primary-color display screen, wherein the three-primary-color display screen includes a three-primary-color adjustment circuit and a backlight module, and the backlight module includes a three-primary-color light bar for emitting three-primary-color light, The three-primary-color light adjusting circuit includes a driving circuit, a main controller, and a sensor;

The sensors are configured to separately collect light flux intensities of three primary color lights emitted by the three primary color light bars, and output the light flux intensities to the main controller;

The main controller is configured to determine the actual brightness ratio of the three primary colors of light according to the luminous flux intensity and a preset algorithm, compare the actual brightness ratio with a preset brightness ratio, and output a duty cycle adjustment signal according to the comparison result to The driving circuit;

The driving circuit is configured to drive the three primary color light bars according to the duty cycle adjustment signal.
The three-primary-color display screen according to claim 1, wherein the main controller is further configured to convert the luminous flux intensity into light intensity, and convert the light intensity into light intensity, and obtain the three primary colors by the light intensity. The actual brightness ratio of the light.
The three-primary-color display screen according to claim 2, wherein the main controller is further configured to obtain a spherical degree of the liquid crystal display, and a ratio of the luminous flux intensity to the spherical degree is used as the light intensity of the three-primary-color light. , The ratio of the light intensity to the area of the display screen is used as the light brightness.
The three-primary-color display screen according to claim 1, wherein the three-primary-color display screen further comprises a voltage input circuit and an operational amplifier circuit;

An output terminal of the sensor is connected to a first input terminal of the operational amplifier circuit, an input terminal of the voltage input circuit is connected to a power source, and an output terminal of the voltage input circuit is connected to a second input terminal of the operational amplifier circuit. An output terminal of the operational amplifier circuit is connected to the main controller.
The three-primary-color display screen according to claim 1, wherein the three-primary-color display screen further comprises a movement board, the movement board comprising a dimming control signal output terminal, an enable signal output terminal, and a power supply. An output terminal and a first ground terminal, the main controller includes a dimming control signal input terminal, an enable signal input terminal, a power input terminal and a second ground terminal, and the dimming control signal output terminal is connected to the dimming control A signal input terminal, the enable signal output terminal is connected to the enable signal input terminal, the power output terminal is connected to the power input terminal, and the first ground terminal is connected to the second ground terminal.
The three-primary-color display screen according to claim 5, wherein the main controller is further configured to divide the dimming control signal and output three dimming control signals to the driving circuit.
The three-primary-color display screen according to claim 6, wherein the three-primary-color display screen further comprises a logic board, the logic board includes a liquid crystal drive output terminal, and the main controller further includes a liquid crystal drive input terminal. The liquid crystal driving output terminal is connected to the liquid crystal driving input terminal;

The main controller is further configured to synchronize the three-way dimming control signal with the liquid crystal driving signal of the liquid crystal driving input terminal and output the same to the driving circuit.
The three-primary-color display screen according to claim 7, wherein the driving circuit includes an input interface and an output interface, and the input interface is respectively connected to the first ground terminal and the power output terminal of the movement board, and Output interfaces are respectively connected to the three primary color light bars.
The tri-primary light display screen according to claim 1, wherein the driving circuit is further configured to boost the connected power supply voltage to a preset driving voltage and output the preset driving voltage to the main Controller.
The three-primary-color display screen according to claim 1, wherein the driving circuit is connected to the three-primary-color light bar through a preset interface.
A display device, wherein the display device includes: a device body and a display screen of three primary colors;

The three-primary-color display screen includes a three-primary-color light adjustment circuit and a backlight module. The backlight module includes a three-primary-color light bar for emitting three-primary-color light. The three-primary-color adjustment circuit includes a driving circuit. , Master controller and sensors;

The sensors are configured to separately collect light flux intensities of three primary color lights emitted by the three primary color light bars, and output the light flux intensities to the main controller;

The main controller is configured to determine the actual brightness ratio of the three primary colors of light according to the luminous flux intensity and a preset algorithm, compare the actual brightness ratio with a preset brightness ratio, and output a duty cycle adjustment signal according to the comparison result to The driving circuit;

The driving circuit is configured to drive the three primary color light bars according to the duty cycle adjustment signal.
The display device according to claim 11, wherein the main controller is further configured to convert the luminous flux intensity into a light intensity, and convert the light intensity into a light intensity, and obtain the actual brightness of the three primary colors of light by the light intensity. proportion.
The display device according to claim 12, wherein the main controller is further configured to obtain a sphericity of the liquid crystal display screen, and use the ratio of the luminous flux intensity and the sphericity as the light intensity of the three primary color lights, The ratio to the display area is used as the brightness of the light.
The display device according to claim 11, wherein the three-primary-color display screen further comprises a voltage input circuit and an operational amplifier circuit;

An output terminal of the sensor is connected to a first input terminal of the operational amplifier circuit, an input terminal of the voltage input circuit is connected to a power source, and an output terminal of the voltage input circuit is connected to a second input terminal of the operational amplifier circuit. An output terminal of the operational amplifier circuit is connected to the main controller.
The display device according to claim 11, wherein the three-primary-color display screen further comprises a movement board, the movement board comprising a dimming control signal output terminal, an enable signal output terminal, a power output terminal, and a first A ground terminal, the main controller includes a dimming control signal input terminal, an enable signal input terminal, a power input terminal, and a second ground terminal; the dimming control signal output terminal is connected to the dimming control signal input terminal; The enable signal output terminal is connected to the enable signal input terminal, the power output terminal is connected to the power input terminal, and the first ground terminal is connected to the second ground terminal.
The display device according to claim 15, wherein the main controller is further configured to divide the dimming control signal and output three dimming control signals to the driving circuit.
The display device according to claim 16, wherein the three-primary-color display screen further comprises a logic board, the logic board includes a liquid crystal driving output terminal, the main controller further includes a liquid crystal driving input terminal, and the liquid crystal A driving output terminal connected to the liquid crystal driving input terminal;

The main controller is further configured to synchronize the three-way dimming control signal with the liquid crystal driving signal of the liquid crystal driving input terminal and output the same to the driving circuit.
The three-primary-color display screen according to claim 17, wherein the driving circuit includes an input interface and an output interface, and the input interface is respectively connected to the first ground terminal and the power output terminal of the movement board, and The output interfaces are respectively connected to the three primary color light bars; the driving circuit is further configured to boost the connected power supply voltage to a preset driving voltage and output the preset driving voltage to the main controller.
The display device according to claim 11, wherein the driving circuit is connected to the three primary color light bars through a preset interface.
A method for adjusting the brightness of three primary colors, wherein the method for adjusting the brightness of three primary colors includes:

Step S10, detecting a parameter state of the three primary colors of light;

Step S20: Calculate the actual brightness ratio of the three primary lights according to the parameter status of the three primary lights;

Step S30, then comparing the actual brightness ratio with a preset brightness ratio;

In step S40, the width of the driving duty ratio of the three primary color light bars is adjusted according to the comparison result.