CN109509438A - Backlight drive component, backlight module and display device - Google Patents
Backlight drive component, backlight module and display device Download PDFInfo
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- CN109509438A CN109509438A CN201811629552.3A CN201811629552A CN109509438A CN 109509438 A CN109509438 A CN 109509438A CN 201811629552 A CN201811629552 A CN 201811629552A CN 109509438 A CN109509438 A CN 109509438A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application discloses a kind of backlight drive component, backlight module and display device, wherein backlight drive component includes photosensitive circuit, control circuit and backlight circuit, and photosensitive circuit is set as generating photosensitive driving signal according to environmental light intensity；Control circuit is connected with photosensitive circuit, and control circuit is set as generating backlight control signal according to photosensitive driving signal；Backlight circuit is connected with control circuit, and backlight circuit is set as generating backlight according to backlight control signal.Technical scheme can protect user's eyesight according to environmental light intensity adjusting backlight luminance so as to improve the display effect of display device.
Description
Technical field
This application involves field of display technology, in particular to a kind of backlight drive component, backlight module and display device.
Background technique
Here statement only provides background information related with the application, without inevitably constituting the prior art.Display dress
It sets and has become display platform important in the fields such as modern information technologies, have a wide range of applications in the products such as video signal.
In a kind of display device, driving signal is generated according to picture signal to be shown, to the light transmittance of pixel each in display panel
It is adjusted, the display of certain grayscale is realized in conjunction with backlight.
However, at present the backlight illumination in display device be it is fixed, when environmental light intensity changes, backlight illumination is not
The variation in environmental light intensity is adapted to, display effect is caused to be deteriorated, the eyesight of user is damaged.
Summary of the invention
The main purpose of the application is to propose a kind of backlight drive component, realizes and changes with environmental light intensity and backlight is adjustable
Display device, improve display effect, protect user's eyesight.
To achieve the above object, the backlight drive component that the application proposes, including photosensitive circuit, control circuit and backlight
Circuit, the photosensitive circuit are set as generating photosensitive driving signal according to environmental light intensity；The control circuit and the photosensitive electricity
Road is connected, and the control circuit is set as generating backlight control signal according to the photosensitive driving signal；The backlight circuit with
The control circuit is connected, and the backlight circuit is set as generating backlight according to the backlight control signal.
Optionally, the photosensitive circuit includes photo resistance and the first divider resistance, the first end of the photo resistance
It is connected to low level signal end；The first end of first divider resistance is connected to the second end of the photo resistance, and described
The second end of one divider resistance is connected to high level signal end；Wherein, the output end of the photosensitive driving signal is set to the light
The second end of quick resistance.
Optionally, one end of the photo resistance is connected to the low level signal end, the other end of the photo resistance
It is connected to the photosensitive driving signal output end, and the resistance value of the photo resistance reduces with the increase of environmental light intensity；Institute
The one end for stating the first divider resistance is connected to the high level signal end, and the other end of first divider resistance is connected to described
Photosensitive driving signal output end.
Optionally, the backlight circuit includes switching device and the second divider resistance, the gate electrode of the switching device
It is connected to the output end of the backlight control signal；The first end of second divider resistance is connected to the of the switching device
One channel electrode, and the first end of second divider resistance is connected to backlight signal end, the second of second divider resistance
End is connected to the second channel electrode of the switching device, and the second end of second divider resistance is connected to backlight assembly
Input terminal.
Optionally, the switching device is positive type metal oxide semiconductor thin film transistor (TFT).
Optionally, the control circuit includes backward diode, edge triggered flip flop, phase inverter and pull down resistor,
The cathode of the backward diode is connected to photosensitive driving signal output end；The pulse input end of the edge triggered flip flop connects
It is connected to the anode of the backward diode；The input terminal of the phase inverter is connected to the output end of the edge triggered flip flop,
The output end of the phase inverter is connected to the control signal of the edge triggered flip flop；One end of the pull down resistor is connected to institute
Low level signal end is stated, the other end of the pull down resistor is connected to the output end of the phase inverter；Wherein, the backlight control
The output end of signal is set to the output end of the phase inverter.
To achieve the above object, the application also proposes a kind of backlight module, the backlight module include backlight assembly and
Backlight drive component, the backlight drive component include photosensitive circuit, control circuit and backlight circuit, and the photosensitive circuit is set
It is set to and photosensitive driving signal is generated according to environmental light intensity；The control circuit is connected with the photosensitive circuit, the control circuit
It is set as generating backlight control signal according to the photosensitive driving signal；The backlight circuit is connected with the control circuit, institute
Backlight circuit is stated to be set as generating backlight according to the backlight control signal.
Optionally, the backlight assembly includes the multiple light emitting diodes being arranged in array.
To achieve the above object, the application is it is further proposed that a kind of display device, the display device include display panel
And backlight module, the backlight module are stacked at the back of the display panel, the backlight module include backlight assembly with
And backlight drive component, the backlight drive component include photosensitive circuit, control circuit and backlight circuit, the photosensitive circuit
It is set as generating photosensitive driving signal according to environmental light intensity；The control circuit is connected with the photosensitive circuit, the control electricity
Road is set as generating backlight control signal according to the photosensitive driving signal；The backlight circuit is connected with the control circuit,
The backlight circuit is set as generating backlight according to the backlight control signal.
Optionally, the display device includes front frame, and the front frame is covered in the front of the display panel, described photosensitive
Circuit includes the light-sensitive device of versus environmental light intensity light and shade, and the light-sensitive device is set to the viewing area of the display panel and described
Between the edge of front frame.
In technical scheme, backlight drive component includes photosensitive circuit, control circuit and backlight circuit, photosensitive electricity
Road is set as generating photosensitive driving signal according to environmental light intensity；Control circuit is connected with photosensitive circuit, and control circuit is set as root
Backlight control signal is generated according to photosensitive driving signal；Backlight circuit is connected with control circuit, and backlight circuit is set as according to backlight
It controls signal and generates backlight.By the way that photosensitive circuit is arranged, environmental light intensity is received, backlight circuit is controlled according to environmental light intensity and generates back
Light makes the backlight of display device can adapt to the variation of environmental light intensity, to facilitate the display effect of improvement display device, protects
Protect the eyesight of user.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of one embodiment of the application backlight module；
Fig. 2 is the structural schematic diagram of one embodiment of the application display device.
The embodiments will be further described with reference to the accompanying drawings for realization, functional characteristics and the advantage of the application purpose.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiment of the application, instead of all the embodiments.Base
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall in the protection scope of this application.
It is to be appreciated that if relating to directionality instruction (such as up, down, left, right, before and after ...) in the embodiment of the present application,
Then directionality instruction be only used for explain under a certain particular pose (as shown in the picture) between each component relative positional relationship,
Motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, being somebody's turn to do " first ", " second " etc. if relating to the description of " first ", " second " etc. in the embodiment of the present application
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.In addition, the meaning of the "and/or" occurred in full text is, and including three schemes arranged side by side, by taking " A and/or B " as an example, including A
The scheme that scheme or B scheme or A and B meet simultaneously.In addition, the technical solution between each embodiment can be combined with each other,
It but must be based on can be realized by those of ordinary skill in the art, when conflicting or nothing occurs in the combination of technical solution
Method realize when will be understood that the combination of this technical solution is not present, also not this application claims protection scope within.
The application proposes a kind of backlight drive component, changes the backlight intensity generated by setting photosensitive circuit, to improve
Display effect protects user's eyesight.
In the embodiment of the application, as shown in Figure 1, the backlight drive component includes:
Photosensitive circuit 111, photosensitive circuit 111 are set as generating photosensitive driving signal according to environmental light intensity；
Control circuit 112, control circuit are connected with photosensitive circuit 111, and control circuit 112 is set as being believed according to photosensitive driving
Number generate backlight control signal；And
Backlight circuit 113, backlight circuit 113 are connected with control circuit 112, and backlight circuit 113 is set as according to backlight control
Signal processed generates backlight.
Hereinafter the technical solution of the application will be elaborated by taking liquid crystal display device as an example.Liquid crystal display device includes
Backlight module and display panel, wherein backlight module includes backlight assembly and backlight drive component.Backlight assembly includes photophore
Part, luminescent device specifically can be light-emitting field-effect pipe, light emitting diode etc., and arranges or be arranged according to certain mode, knot
The leaded light device etc. being arranged in backlight assembly is closed, relatively uniform backlight is generated under the action of backlight signal, is filled as display
The light source set.Backlight drive component is electrically connected with backlight assembly, drives the operation of backlight assembly, with control backlight switch and its
The parameters such as brightness.Display panel includes multiple pixels, multiple data lines, multi-strip scanning line etc..Wherein, the pixel on display panel
Usual rectangular array shape arrangement, pixel includes pixel electrode and pixel switch device.Pixel switch device is usually film crystalline substance
Body pipe (Thin-film transistor, TFT), under the action of the scanning signal in scan line, TFT controls data line to right
The pixel electrode charging answered controls liquid in pixel to form voltage between the pixel electrode and public electrode of pixel capacitance
Brilliant deflection angle.In general, include red pixel, green pixel and blue three kinds of pixels of pixel in display panel, at least one red pixel,
One green pixel and a blue pixel form a pixel group, to show colored picture according to spacing color mixed principle.Pixel is being swept
Under the collective effect for retouching the data-signal in the scanning signal and data line on line, liquid crystal therein deflects, light transmittance phase
It should be modulated, in conjunction with the backlight that backlight assembly generates, show certain grayscale.In order to keep the pixel level on pixel electrode with
Display effect is kept, storage capacitance etc. can also be set within the pixel.It further include printed circuit board (Printed in display device
Circuit Board, PCB), PCB and source driving chip (Source-chip on film, S-COF) and grid drive chip
(Gate-chip on film, G-COF) etc. is connected, and S-COF is connected with the data line on display panel, with outputting data signals
To data line, G-COF is connected with the scan line on display panel, to export in scanning signal to scan line.It is aobvious in large scale
Show in panel, two or more S-COF and/or G-COF can also be set, to ensure effective transmission of display data.
As shown in Figure 1, backlight drive component includes photosensitive circuit 111, the optical property of photosensitive circuit 111 is with environment light
Strong variation and generate variation so that backlight drive component is able to respond the variation in environmental light intensity.Photosensitive circuit 111 produces
With the electric signal of certain functional relation between raw and environmental light intensity, which can be directly as photosensitive driving signal；Or
Amplifying device, filtering device etc. also can be set in photosensitive circuit 111 in person, the above-mentioned electric signal directly generated is amplified,
The processing such as filtering improves signal-to-noise ratio to advanced optimize the waveform of electric signal, and will treated electric signal as photosensitive driving
Signal.Control circuit 112 is connected with photosensitive circuit 111, and control circuit 111 is set as generating backlight control according to photosensitive driving signal
Signal processed, and export to the backlight circuit 113 being connected with control circuit 112, produce backlight circuit 113 according to backlight control signal
Raw backlight.Wherein, the specific control direction of control circuit 112 is related with the specifically setting of photosensitive circuit 111, backlight circuit 113.
In general, when environmental light intensity is weaker, it is desirable to which the backlight of display device is weaker, to improve display effect, protects user's eyesight.That
, if environmental light intensity is weaker, the photosensitive driving signal that photosensitive circuit 111 generates is stronger, then control circuit 112 is set as when photosensitive
When driving signal is stronger, it is weaker to generate the backlight that backlight control signal generates backlight circuit 113；If environmental light intensity is weaker, light
The photosensitive driving signal that quick circuit 111 generates is weaker, then control circuit 112 is set as when photosensitive driving signal is weaker, generates
The backlight that backlight control signal generates backlight circuit 113 is weaker.It certainly, can also be according to need in some special examples
Ask setting backlight drive component when environmental light intensity dies down, driving backlight assembly generates stronger backlight, and details are not described herein.
In the present embodiment, backlight drive component includes photosensitive circuit 111, control circuit 112 and backlight circuit 113,
Photosensitive circuit 111 is set as generating photosensitive driving signal according to environmental light intensity；Control circuit 112 is connected with photosensitive circuit 111, control
Circuit 112 processed is set as generating backlight control signal according to photosensitive driving signal；Backlight circuit 113 is connected with control circuit 112,
Backlight circuit 113 is set as generating backlight according to backlight control signal.By the way that photosensitive circuit 111 is arranged, environmental light intensity, root are received
Backlight is generated according to environmental light intensity control backlight circuit 113, the backlight of display device is made to can adapt to the variation of environmental light intensity, thus
The display effect for facilitating improvement display device, protects the eyesight of user.
Optionally, as shown in Figure 1, photosensitive circuit includes photo resistance Rs and the first divider resistance R1, photo resistance Rs
First end be connected to low level signal end；The first end of first divider resistance R1 is connected to the second end of photo resistance Rs, the
The second end of one divider resistance R1 is connected to high level signal end VDD；Wherein, the output end of photosensitive driving signal is set to photosensitive electricity
Hinder the second end of Rs.
Specifically, usually using ground terminal GND as low level signal end.First divider resistance R1 and photo resistance Rs series connection
It is connected between high level signal end VDD and low level signal end, to realize that the partial pressure to high level signal acts on, and output phase
The partial pressure answered is as photosensitive driving signal.
In a specific example, as shown in Figure 1, one end of photo resistance Rs is connected to low level signal end, photo resistance
The other end of Rs is connected to photosensitive driving signal output end, and the resistance value of photo resistance reduces with the increase of environmental light intensity；
One end of first divider resistance R1 is connected to high level signal end, and the other end of the first divider resistance R1 is connected to photosensitive driving letter
Number output end.
That is, in this example, the resistance value of photo resistance Rs reduces with the increase of environmental light intensity, work as environmental light intensity
When increase, the resistance value of photo resistance Rs becomes smaller, then can be considered short circuit between photosensitive driving signal output end and low level signal end
Or near short circuit, the photosensitive driving signal of output are in low level state；When environmental light intensity becomes smaller, the resistance value of photo resistance Rs
Become larger, then photosensitive driving signal is in high level state, specially VDD*Rs/ (R1+Rs).Usually resistance value can be selected to be greater than
Or the photo resistance being reduced rapidly when equal to a certain Intensity threshold.
Certainly, in another example, if wishing the photosensitive driving signal of the output low level state when environmental light intensity increases,
Also the photo resistance that resistance value increases with the increase of environmental light intensity, and photo resistance shown in interchange graph 1 and be can choose
The position of one divider resistance, when environmental light intensity increases, the partial pressure of photosensitive driving signal output end becomes smaller, i.e., initial low level shape
The photosensitive driving signal of state.
Optionally, as shown in Figure 1, backlight circuit includes switching device M1 and the second divider resistance R2, switching device M1
Gate electrode be connected to the output end of backlight control signal；The first end of second divider resistance R2 is connected to the of switching device M1
One channel electrode, and the first end of the second divider resistance R2 is connected to backlight signal end, the second end of the second divider resistance R2 connects
It is connected to the second channel electrode of switching device M1, and the second end of the second divider resistance R2 is connected to the input terminal of backlight assembly.
Wherein, low level signal end can be ground terminal GND, and switching device M1 is connected under the control of backlight control signal
Or shutdown, it is acted in conjunction with the partial pressure of the second divider resistance R2, the voltage swing at 120 both ends of backlight assembly will change.In general,
The voltage at 120 both ends of backlight assembly is bigger, and backlight caused by backlight assembly 120 is also stronger, therefore, is believed by backlight control
Number, the backlight illumination of generation can be realized and be adjusted, and because backlight control signal is related with photosensitive driving signal, generated
Backlight illumination it is related to environmental light intensity.
In a specific example, the type metal oxide semiconductor thin film transistor (TFT) as shown in Figure 1, switching device M1 is positive
(Positive channel Metal Oxide Semiconductor TFT, PMOS TFT)；Second divider resistance R2 connection
Between the first channel electrode and the second channel electrode of switching device M1, i.e., between source electrode and drain electrode, and the second partial pressure
One end of resistance R2 is connected to backlight signal end Vin, and the other end of the second divider resistance R2 is connected to the one of backlight assembly 120
End；The other end of backlight assembly 120 is connected to low level signal end.
The equivalent resistance value of backlight assembly 120 can be replaced with resistance Re, in this example, when backlight control signal is in height
When level state, switching device M1 conducting, the backlight signal at backlight signal end is applied directly to 120 both ends of backlight assembly, makes to carry on the back
Optical assembly 120 can generate stronger backlight；When backlight control signal is in low level state, switching device M1 shutdown, back
The backlight signal of optical-signal end is applied to 120 both ends of backlight assembly after the second divider resistance R2 partial pressure, produces backlight assembly 120
Raw backlight intensity weakens, and to adapt to the variation of environmental light intensity, protects user's eyesight.
Certainly, in another specific example, minus metal oxide semiconductor films transistor can also be selected to be used as and opened
Device is closed, and combines the voltage at backlight control signal control backlight assembly both ends, and then it is strong to control the backlight that backlight assembly generates
Degree, details are not described herein.
Control circuit 112 is set as generating backlight control signal according to photosensitive driving signal, with when environmental light intensity dies down,
For required backlight intensity accordingly dies down, optionally, as shown in Figure 1, control circuit 112 includes backward diode D3,
Edge triggered flip flop D1, phase inverter D2 and pull down resistor R3, wherein the cathode of backward diode D3 is connected to photosensitive driving
Signal output end；The pulse input end C of edge triggered flip flop D1 is connected to the anode of backward diode；The input of phase inverter D2
End is connected to the output end Q of edge triggered flip flop D1, and the output end of phase inverter D2 is connected to the control signal of edge triggered flip flop D1
D；One end of pull down resistor R3 is connected to low level signal end, and the other end of pull down resistor R3 is connected to the output of phase inverter D2
End；Wherein, the output end of backlight control signal is set to the output end of phase inverter D2.
Specifically, low level signal end can be ground signalling end GND.In circuit shown in Fig. 1, when environmental light intensity compared with
When weak, the resistance value of photo resistance Rs is larger, and the cathode level of backward diode D3 is VDD*Rs/ (R1+Rs).By prior
Suitable R1 and Rs is selected, above-mentioned level VDD*Rs/ (R1+Rs) can be made to be greater than the breakdown voltage of backward diode D3.
Due to the plus earth of backward diode D3, then backward diode D3 is breakdown at this time, edge triggered flip flop D1's
Pulse input end C generates the rising pulses that VDD*Rs/ (R1+Rs) is converted to by 0V.When the pulse of edge triggered flip flop D1 is defeated
Enter to hold C receive rising edge along when, the level value of control signal D is assigned to output end Q, at this time output end Q be in it is low
Level state, i.e. backlight control signal are in low level state.Correspondingly, switching device M1 (PMOS TFT) is off shape
The voltage of state, 120 both ends of backlight assembly is reduced to Vin*Re/ (R2+Re), the backlight of generation through the partial pressure of the second divider resistance R2
Intensity is weaker.When environmental light intensity is stronger, such as higher than 30 lumen-hour of Intensity threshold of photo resistance, the resistance value of photo resistance Rs
Smaller, the cathode of backward diode D3 is in low level state under the action of low level signal end, by reverse breakdown shape
State is restored to reverse blocking state, generates one in the pulse input end C of edge triggered flip flop D1 and is converted to low level by high level
Falling pulse.When the pulse input end C of edge triggered flip flop D1 receive trailing edge along when, the level value of control signal D
It is assigned to output end Q, output end Q is in high level state at this time, i.e. backlight control signal is in high level state.Accordingly
, switching device M1 (PMOS TFT) is in the conductive state, and the voltage at 120 both ends of backlight assembly is Vin, the backlight intensity of generation
It is weaker.
The application also proposes a kind of backlight module, as shown in Figure 1, backlight module includes that backlight assembly 120 and backlight are driven
Dynamic component, the specific structure of the backlight drive component is referring to above-described embodiment, and this is no longer going to repeat them.
Optionally, backlight assembly 120 includes the multiple light emitting diodes being arranged in array.Light emitting diode is a kind of shines
Luminescent device high-efficient, luminescent lifetime is long, and connect simply, it is used in backlight assembly 120, is ensureing the same of backlight intensity
When, energy consumption can be reduced well, while extending the service life of backlight assembly 120.
The application also proposes a kind of display device, as shown in Fig. 2, display device includes display panel and backlight module,
Backlight module is stacked at the back of display panel.Wherein, display panel includes viewing area 210 and non-display area 220, and picture is aobvious
Show in area 210 and shows, and associated driver circuitry of display device etc. can be set at 220 back of non-display area.
Optionally, display device includes front frame 300, and front frame 300 is covered in the front of display panel, and photosensitive circuit 111 wraps
The light-sensitive device 111a of versus environmental light intensity light and shade is included, light-sensitive device 111a is set to viewing area 210 and the front frame 300 of display panel
Edge between.
Front frame 300 is displayed for the assembling of device, makes its stable structure, and tailored appearance is beautiful, by by photosensor
Part 111a is arranged between the viewing area 210 of display panel and the edge of front frame 300, on the one hand consolidating convenient for light-sensitive device 111a
It is fixed, on the other hand environment light can also be blocked to avoid front frame 300, cause light-sensitive device 111a can not be according to the variation of environmental light intensity
Generate corresponding electric signal.Wherein, light-sensitive device 111a specifically can be photo resistance etc..
The foregoing is merely the alternative embodiments of the application, are not intended to limit the scope of the patents of the application, all at this
Under the inventive concept of application, using equivalent structure transformation made by present specification and accompanying drawing content, or directly/use indirectly
In the scope of patent protection that other related technical areas are included in the application.
Claims (10)
1. a kind of backlight drive component, which is characterized in that the backlight drive component includes:
Photosensitive circuit, the photosensitive circuit are set as generating photosensitive driving signal according to environmental light intensity；
Control circuit, the control circuit are connected with the photosensitive circuit, and the control circuit is set as according to the photosensitive drive
Dynamic signal generates backlight control signal；And
Backlight circuit, the backlight circuit are connected with the control circuit, and the backlight circuit is set as according to the backlight control
Signal processed generates backlight.
2. backlight drive component as described in claim 1, which is characterized in that the photosensitive circuit includes:
Photo resistance, the first end of the photo resistance are connected to low level signal end；And
First divider resistance, the first end of first divider resistance are connected to the second end of the photo resistance, and described first
The second end of divider resistance is connected to high level signal end；
Wherein, the output end of the photosensitive driving signal is set to the second end of the photo resistance.
3. backlight drive component as claimed in claim 2, which is characterized in that one end of the photo resistance is connected to described low
Level signal end, the other end of the photo resistance are connected to the photosensitive driving signal output end, and the photo resistance
Resistance value reduces with the increase of environmental light intensity；
One end of first divider resistance is connected to the high level signal end, the other end connection of first divider resistance
In the photosensitive driving signal output end.
4. backlight drive component as claimed any one in claims 1 to 3, which is characterized in that the backlight circuit includes:
Switching device, the gate electrode of the switching device are connected to the output end of the backlight control signal；And
The first end of second divider resistance, second divider resistance is connected to the first channel electrode of the switching device, and
The first end of second divider resistance is connected to backlight signal end, and the second end of second divider resistance is connected to described open
The second channel electrode of device is closed, and the second end of second divider resistance is connected to the input terminal of backlight assembly.
5. backlight drive component as claimed in claim 4, which is characterized in that the switching device is eurymeric metal oxide half
Conductor thin film transistor.
6. backlight drive component as claimed in claim 5, which is characterized in that the control circuit includes:
Backward diode, the cathode of the backward diode are connected to photosensitive driving signal output end；
Edge triggered flip flop, the pulse input end of the edge triggered flip flop are connected to the anode of the backward diode；
Phase inverter, the input terminal of the phase inverter are connected to the output end of the edge triggered flip flop, the output end of the phase inverter
It is connected to the control signal of the edge triggered flip flop；And
Pull down resistor, one end of the pull down resistor are connected to the low level signal end, and the other end of the pull down resistor connects
It is connected to the output end of the phase inverter；
Wherein, the output end of the backlight control signal is set to the output end of the phase inverter.
7. a kind of backlight module, which is characterized in that the backlight module includes:
Backlight assembly；And
Such as backlight drive component described in any one of claims 1 to 6.
8. backlight module as claimed in claim 7, which is characterized in that the backlight assembly includes the multiple hairs being arranged in array
Optical diode.
9. a kind of display device, which is characterized in that the display device includes:
Display panel；And
Backlight module as claimed in claim 7 or 8, the backlight module are stacked at the back of the display panel.
10. display device as claimed in claim 9, which is characterized in that the display device includes front frame, and the front frame covers
In the front of the display panel, the photosensitive circuit includes the light-sensitive device of versus environmental light intensity light and shade, the light-sensitive device
Between the viewing area of the display panel and the edge of the front frame.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811629552.3A CN109509438A (en) | 2018-12-28 | 2018-12-28 | Backlight drive component, backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811629552.3A CN109509438A (en) | 2018-12-28 | 2018-12-28 | Backlight drive component, backlight module and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111681605A (en) * | 2020-07-08 | 2020-09-18 | 深圳大学 | Photosensitive photoelectric device drive control circuit and display device |
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| CN111681605B (en) * | 2020-07-08 | 2021-12-07 | 深圳大学 | Photosensitive photoelectric device drive control circuit and display device |
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