CN204242564U - Adopt the display of direct-light type LED backlight module - Google Patents
Adopt the display of direct-light type LED backlight module Download PDFInfo
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- CN204242564U CN204242564U CN201420763639.0U CN201420763639U CN204242564U CN 204242564 U CN204242564 U CN 204242564U CN 201420763639 U CN201420763639 U CN 201420763639U CN 204242564 U CN204242564 U CN 204242564U
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Abstract
The utility model relates to display, discloses a kind of display adopting direct-light type LED backlight module.In the utility model, the light intensity of backlight module can environmentally light light intensity regulate automatically, improve the legibility of display and can visual fatigue be alleviated, light intensity also should be able to adjust according to surrounding environment and user's request, avoid user not see displaying contents when surround lighting is very strong, or feel dazzling when surround lighting is very dark.In the utility model, comprise three primary colors sensor, controller, LED drive module, direct-light type LED backlight module; Three primary colors sensor is connected with controller, for the three primary colors light intensity input control device of surround lighting that will detect; Controller is connected with LED drive module, for the three primary colors intensity control LED drive module of environmentally light; LED drive module is connected with direct-light type LED backlight module, for regulating the primaries intensity of direct-light type LED backlight module according to the output signal of controller.
Description
Technical field
The utility model relates to display, particularly adopts the display of direct-light type LED backlight module.
Background technology
At present, LCD (liquid crystal) display has been widely used in business, industry and the field such as military.And LED backlight is National 863 emphasis brainstorm subject, it has clear superiority in stability, visuality, environmental protection, luminescence efficiency, color saturation, volume, Dynamic controlling etc., popularizes rapidly.
That traditional LCD backlight adopts is cold-cathode fluorescence lamp (CCFL), and color reducibility is poor, only can provide 72% of colour gamut in NTSC (NationalTelevision System Committee) standard; And LED backlight color reducibility is good, can reach 105% of colour gamut in NTSC standard, even more than 120%, and the life-span is long, not mercurous.
LED-backlit module is generally divided into side-light type and straight-down negative by incoming position, can be divided into RGB LED and white light LEDs by LED kind.Compared with side-light type back light, direct-light-type backlight is distributed in the rear of panel due to LED, Luminance Distribution evenly.RGB LED-backlit have employed the trichromatic LED of RGB as individual lighting elements, compared with white light LEDs, has better brightness, contrast and color reducibility.By analyzing, straight-down negative RGB LED is more suitable for as the LCD display backlight under cabin ambient.
Utility model content
The purpose of this utility model is to provide a kind of display adopting direct-light type LED backlight module, the light intensity of the backlight module of display can the three primary colors light intensity of environmentally light regulate automatically, improve the legibility of display and can alleviate visual fatigue, the light intensity of display also should be able to adjust according to surrounding environment and user's request.
For solving the problems of the technologies described above, embodiment of the present utility model discloses a kind of display adopting direct-light type LED backlight module, comprises three primary colors sensor, controller, LED drive module, direct-light type LED backlight module;
Three primary colors sensor is connected with controller, for the three primary colors light intensity input control device of surround lighting that will detect;
Controller is connected with LED drive module, for the three primary colors intensity control LED drive module of the surround lighting according to input;
LED drive module is connected with direct-light type LED backlight module, for regulating the primaries intensity of direct-light type LED backlight module according to the output signal of controller.
Compared with prior art, the key distinction and effect thereof are the utility model embodiment:
The light intensity of the backlight module of display can the three primary colors light intensity of environmentally light regulate automatically, improve the legibility of display and can visual fatigue be alleviated, the light intensity of display also should be able to adjust according to surrounding environment and user's request, avoid user not see displaying contents when surround lighting is very strong, or feel dazzling when surround lighting is very dark.
Further, adopt RGB LED as backlight module, the most high energy of the gamut range of display reaches about 150% of NTSC colour gamut, and meanwhile, RGB LED backlight supports that backlight area adjustment technology, dynamic contrast can reach 10,000,000 1 grade.
Further, because LED light source is pointolite, the area source that piecemeal makes it possible to be formed brightness uniformity is carried out to backlight module screen, and large-sized liquid crystal display can be applicable to.
Further, when sampling to light intensity signal, 1s samples 600 points averaging, can the undesired signal of filtering 50Hz and 60Hz.
Further, detected the temperature of described direct-light type LED backlight module by temperature sensor, can ensure that LED normally works.
Further, each module of display is connected by CAN, and communication reliability is high, and cost is low.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation adopting the display of direct-light type LED backlight module in the utility model first embodiment;
Fig. 2 is a kind of structural representation adopting the display of direct-light type LED backlight module in the utility model second embodiment;
Fig. 3 is a kind of structural representation adopting the display of direct-light type LED backlight module in the utility model the 3rd embodiment.
Embodiment
In the following description, many ins and outs are proposed in order to make reader understand the application better.But, persons of ordinary skill in the art may appreciate that even without these ins and outs with based on the many variations of following embodiment and amendment, also can realize each claim of the application technical scheme required for protection.
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
The utility model first embodiment relates to a kind of display adopting direct-light type LED backlight module, and Fig. 1 is the structural representation of the display of this employing direct-light type LED backlight module.
Specifically, as shown in Figure 1, the display of this employing direct-light type LED backlight module comprises three primary colors sensor, controller, LED drive module, direct-light type LED backlight module.
Three primary colors sensor is connected with controller, for the three primary colors light intensity input control device of surround lighting that will detect.
Controller is connected with LED drive module, for the three primary colors intensity control LED drive module of the surround lighting according to input.
LED drive module is connected with direct-light type LED backlight module, for regulating the primaries intensity of direct-light type LED backlight module according to the output signal of controller.
Preferably, three primary colors sensor is also connected with direct-light type LED backlight module, for detecting trichromatic actual light intensity in backlight module.
Preferably, controller controls LED drive module and exports corresponding pwm signal, and for the light intensity of adjusting ambient light.
In the present embodiment, the light intensity of the backlight module of display can the three primary colors light intensity of environmentally light regulate automatically, improve the legibility of display and can visual fatigue be alleviated, the light intensity of display also should be able to adjust according to surrounding environment and user's request, avoid user not see displaying contents when surround lighting is very strong, or feel dazzling when surround lighting is very dark.
The utility model second embodiment relates to a kind of display adopting direct-light type LED backlight module, and the second embodiment improves on the basis of the first embodiment, and main improvements are:
Direct-light type LED backlight module is RGB LED-backlit module.Adopt RGB LED as backlight module, the most high energy of the gamut range of display reaches about 150% of NTSC colour gamut, and meanwhile, RGB LED backlight supports that backlight area adjustment technology, dynamic contrast can reach 10,000,000 1 grade.
Three primary colors sensor is photodiode, for light signal being converted to the trichromatic electric signal of red, green, blue.
Direct-light type LED backlight module adopts block design, and each segmented areas all connects LED drive module.Because LED light source is pointolite, the area source that piecemeal makes it possible to be formed brightness uniformity is carried out to backlight module screen, and large-sized liquid crystal display can be applicable to.
The sample frequency of controller to the three primary colors light intensity signal of input is 600Hz.When sampling to light intensity signal, 1s is adopted to sample 600 points averaging, can the undesired signal of filtering 50Hz and 60Hz.
The utility model the 3rd embodiment relates to a kind of display adopting direct-light type LED backlight module, and the 3rd embodiment improves on the basis of the second embodiment, and main improvements are:
Also comprise manual adjustments module, manual adjustments module is connected with controller, for regulating the primaries intensity of direct-light type LED backlight module, thus can regulate light intensity according to the hobby of user.
Also comprise temperature sensor, be connected with direct-light type LED backlight module, for detecting the temperature of direct-light type LED backlight module.Detected the temperature of direct-light type LED backlight module by temperature sensor, can ensure that LED normally works.
Controller and three primary colors sensor, connected by CAN between LED drive module.Each module of display is connected by CAN, and communication reliability is high, and cost is low.
Embodiment one
Fig. 2 is the LCD display structural representation adopting direct LED backlight.
Because LED light source is pointolite, need to carry out optical design to it, form the area source of brightness uniformity.Carried out piecemeal to backlight module screen in addition, every block region adopts three LED drive integrated circults to control the luminous intensity of primitive colours LED respectively.
Because human eye gets used to the object of the occurring in nature seen by ambient light effects, the light characteristic at occurring in nature object is simulated in the brightness of the backlight module of the present embodiment design, when R, G, B three-color LED brightness wherein reaches maximal value, the white balance of display screen reaches best.
The light intensity of electric circuit inspection surround lighting, make surround lighting resolve into red, green, blue signal through three primary colors sensor, its size represents with xR, xG, xB respectively, and then environmentally the intensity of light regulates the primaries intensity of backlight respectively.The trichromatic light intensity sent is needed to represent with yR, yG, yB respectively backlight module.Backlight module is made to need the pass of the three primary colors light intensity of three primary colors light intensity and the surround lighting sent to be: yi=kixi+bi.
In relational expression, i desirable R, G, B; The light intensity of backlight i-th kind of color that bi is surround lighting when being 0, ki sets with reference to the intensity properties of occurring in nature common objects under natural light irradiation, ki and bi is greater than 0, and its value is stored in single-chip microcomputer, and can according to user need change.
Control module is constantly measured the light intensity of surround lighting and the three primary colors actual light intensity of backlight module by three primary colors sensor, control LED drive integrated circult exports corresponding pwm signal, thus the light intensity realizing backlight module can regulate automatically according to the illumination of surrounding environment light.
If user is unsatisfied with the light intensity automatically regulated, can according to the light intensity of personal like's manual adjustments backlight module.Three primary colors light intensity before backlight module regulates is yi, and the three primary colors light intensity after manual shift is y'i, calculates b'i, k'i by y'i: b'i and k'i calculated may be very little, for this situation, is provided with bmini and kmini in circuit.Relatively b'i and bmini, using larger value as the bi value after adjustment stored in circuit; Relatively k'i and kmini, using larger value as the ki value after adjustment stored in single-chip microcomputer.Thus the amendment completed relation between backlight module light intensity and ambient light intensity.The initial value setting bi and ki during system initialization is bsi and ksi, and is stored in single-chip microcomputer, and user can make bi and ki revert to bsi and ksi by button.
Embodiment two
Cabinet type display device mainly concentrates on middle size, and what design herein is the backlight drive circuit of 7 cun of liquid crystal display.The circuit theory diagrams of detection and drive part as shown in Figure 2.
Adopt STC12C5624AD single-chip microcomputer as control module in circuit; Adopt RICHTEK company (Liqi Sci-Techn Co., Ltd.) LM 2733 booster power produced, drive red, green, blue three-color LED respectively; Using LM20 as temperature sensor, detect the temperature of LED at any time, ensure that LED normally works; Select photodiode MCS3AS as three primary colors sensor, light signal is converted to the trichromatic electric signal of red, green, blue; By whether resetting to initial value and hand-operating light by key control.
For improving the reliability of system, the backlight module of liquid crystal is divided into 9 regions.Meanwhile, be filtering 50Hz, 60Hz undesired signal, when the light intensity signal of this circuit to surround lighting and backlight module is sampled, adopt 1s to sample method that 600 points average.
For ensureing the reliability of communication, the design adopts CAN communication.The serial communications network that CAN network is a kind of effective support distributed AC servo system or controls in real time, its bus specification is formulated as international standard by ISO ISO (International Standards Organization), and is acknowledged as one of the most promising fieldbus.Because its design cost is low, communication reliability is high, be widely used in each data communication detected between topworks in control system.
Using single-chip microcomputer, three primary colors sensor, temperature sensor, LED drive integrated circult as a node, adopt SJA1000 and TJA1040 as the communication device of node.Backlit message and surround lighting information are sent in CAN by node single-chip microcomputer, also can receive the information in CAN simultaneously.The transfer rate that the design adopts is 500kbps.
More than by investigating to backlight of LCD, in conjunction with the requirement of cabin ambient to display, devise a kind of straight-down negative RGB LED backlight drive circuit for passenger cabin, its energy automatic or manual regulates the brightness in display backlight source.Use after tested, adopt the LCD display of the design's technology still to possess readability when light is brighter around, ensure that the safety and reliability of display display information.
Because the design adopts zoning design, its backlight circuit design proposal also can be used in large scale liquid crystal display.
The utility model devises a kind of driving circuit LED backlight being applied to display, wherein have employed direct-light type LED backlight Driving technique leading in the world, and by backlight module subregion, utilizes CAN technology to ensure effective communication.The design of circuit enables the light intensity of display backlight module, and environmentally the three primary colors light intensity of light or user preferences automatic or manual regulate.And this design can meet the viewing demand of indoor user better.
It should be noted that, in the claim and instructions of this patent, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element " being comprised " limited by statement, and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Although by referring to some preferred implementation of the present utility model, the utility model illustrated and describe, but those of ordinary skill in the art should be understood that and can do various change to it in the form and details, and does not depart from spirit and scope of the present utility model.
Claims (10)
1. adopt a display for direct-light type LED backlight module, it is characterized in that, comprise three primary colors sensor, controller, LED drive module, direct-light type LED backlight module;
Described three primary colors sensor is connected with described controller, for the three primary colors light intensity of the surround lighting detected is inputted described controller;
Described controller is connected with described LED drive module, for the surround lighting according to described input three primary colors intensity control described in LED drive module;
Described LED drive module is connected with described direct-light type LED backlight module, for regulating the primaries intensity of described direct-light type LED backlight module according to the output signal of described controller.
2. the display of employing direct-light type LED backlight module according to claim 1, is characterized in that, described three primary colors sensor is also connected with described direct-light type LED backlight module, for detecting trichromatic actual light intensity in backlight module.
3. the display of employing direct-light type LED backlight module according to claim 1, is characterized in that, described direct-light type LED backlight module is RGB LED-backlit module.
4. the display of employing direct-light type LED backlight module according to claim 1, is characterized in that, described three primary colors sensor is photodiode, for light signal being converted to the trichromatic electric signal of red, green, blue.
5. the display of employing direct-light type LED backlight module according to claim 1, it is characterized in that, also comprise manual adjustments module, described manual adjustments module is connected with described controller, for regulating the primaries intensity of described direct-light type LED backlight module.
6. the display of employing direct-light type LED backlight module according to claim 1, is characterized in that, described direct-light type LED backlight module adopts block design, and each segmented areas all connects described LED drive module.
7. the display of employing direct-light type LED backlight module according to claim 1, is characterized in that, the sample frequency of described controller to the three primary colors light intensity signal of input is 600Hz.
8. the display of employing direct-light type LED backlight module according to claim 1, it is characterized in that, described controller controls described LED drive module and exports corresponding pwm signal, and for the light intensity of adjusting ambient light.
9. the display of employing direct-light type LED backlight module according to claim 1, is characterized in that, also comprise temperature sensor, is connected with described direct-light type LED backlight module, for detecting the temperature of described direct-light type LED backlight module.
10. the display of employing direct-light type LED backlight module according to claim 1, is characterized in that, described controller and described three primary colors sensor, connected by CAN between LED drive module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420763639.0U CN204242564U (en) | 2014-12-05 | 2014-12-05 | Adopt the display of direct-light type LED backlight module |
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| CN201420763639.0U CN204242564U (en) | 2014-12-05 | 2014-12-05 | Adopt the display of direct-light type LED backlight module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10132490B1 (en) | 2017-10-17 | 2018-11-20 | Fung Academy Limited | Interactive apparel ecosystems |
| CN112614465A (en) * | 2020-12-21 | 2021-04-06 | 苏州长风航空电子有限公司 | Method and device for accurately controlling backlight brightness of airborne display |
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2014
- 2014-12-05 CN CN201420763639.0U patent/CN204242564U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10132490B1 (en) | 2017-10-17 | 2018-11-20 | Fung Academy Limited | Interactive apparel ecosystems |
| CN112614465A (en) * | 2020-12-21 | 2021-04-06 | 苏州长风航空电子有限公司 | Method and device for accurately controlling backlight brightness of airborne display |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150401 Termination date: 20191205 |