CN201600531U - Lcd backlight device - Google Patents
Lcd backlight device Download PDFInfo
- Publication number
- CN201600531U CN201600531U CN2009202057437U CN200920205743U CN201600531U CN 201600531 U CN201600531 U CN 201600531U CN 2009202057437 U CN2009202057437 U CN 2009202057437U CN 200920205743 U CN200920205743 U CN 200920205743U CN 201600531 U CN201600531 U CN 201600531U
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- light source
- lcd
- light guide
- lighting device
- back lighting
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Abstract
The utility model relates to an LCD backlight device comprising a PCB board, an LCD which is arranged on the PCB board and driven by the PCB board and at least one display symbol arranged at the inner part of the LCD. The LCD backlight device further comprises at least one light source and at least one light guide piece; and the at least one light guide piece is arranged between the at least one light source and the display symbol so as to transmit light emitted by the at least one light source to the display symbol. The LCD backlight device has simple structure, the area of a screen illuminated is actually very small and is less than 1/10 of the area of the entire LCD screen, even 1/20, so that the power consumption is low and the cost is low; furthermore, when a photoresistor is adopted, an LED lamp is used only when an external light source is not bright enough or the outside has no light source, so that the LCD backlight device is more power-saving; and therefore, a product using the LCD backlight device can use a common battery used on the market, and is unnecessarily connected with a commercial power, so that the LCD backlight device is convenient to be carried and moved.
Description
Technical field
The utility model relates to a kind of display device, more particularly, relates to a kind of LCD back lighting device.
Background technology
Liquid crystal indicator (LCD:Liquid Crystal Display) utilizes external fields of force such as electric field, magnetic field, heat to make the Liquid Crystal Molecules Alignment state variation become the element of another ordered state.The variation of this molecules align can cause the optical property of liquid crystal photoelectric tube to change, thereby regulates incident light.Therefore liquid crystal indicator can utilize battery-operated because the electric energy of its consumption is few for a long time.Because liquid crystal indicator itself is non-luminophor, therefore, in LCD commonly used, adopt the LED lamp usually as back light, its defective is, use LED to illuminate the whole screen of LCD, light-receiving area is big.And only need be concerning the LCD display device that numeral shows for LCD clock and so on, really the screen area that need be illuminated is in the extreme little in fact, be less than 1/10 of whole lcd screen area, even 1/20, this wide part that makes LED send has all slatterned, therefore efficient is very low, and power consumption is big.
Therefore, need a kind of simple in structure, power consumption is few and cost is low LCD back lighting device.
The utility model content
The technical problems to be solved in the utility model is, and is low at the efficient of the LCD back lighting device of prior art, and the defective that power consumption is big provides a kind of simple in structure, power consumption is few and cost is low LCD back lighting device.
The technical scheme that its technical matters that solves the utility model adopts is: construct a kind of LCD back lighting device, comprise pcb board, be arranged on the described pcb board and be subjected to described pcb board LCD driven, be arranged at least one displaying symbol of described LCD inside; It further comprises at least one light source and at least one light guide, and described at least one light guide is arranged between described at least one light source and the described displaying symbol and is transmitted to described displaying symbol so that described at least one light source is sent light.
In LCD back lighting device described in the utility model, described light guide comprises at least one light guide sheet, and the shape of described light guide sheet and the shape of described displaying symbol are complementary.
In LCD back lighting device described in the utility model, described light guide comprises at least one group of light guide bundles, comprise many optical fiberses in described each group light guide bundles, described many fiber-optic ends are tied up bunchy and are fixed on the dead ahead of at least one light source, and the other end is equidistantly arranged each other to constitute the stroke of described displaying symbol.
In LCD back lighting device described in the utility model, described each group light guide bundles is the optical fiber winding displacement.
In LCD back lighting device described in the utility model, described at least one light source comprises at least one LED lamp, and described at least one LED lamp rear side is provided with collector lens, and described light guide is arranged on the focus of described collector lens.
In LCD back lighting device described in the utility model, described at least one light source comprises external light source, is provided with collector lens between described external light source and the described light guide, and described light guide is arranged on the focus of described collector lens.
In LCD back lighting device described in the utility model, further be provided with on the described pcb board be used to detect external light source and generate sensitization resistance that light source selects signal with link to each other with described sensitization resistance with receive described light source selection signal and select described at least one LED lamp or external light source as the light source selected cell of light source.
In LCD back lighting device described in the utility model, described LCD back lighting device further comprises at least one light guide bundles support, described light guide bundles support comprises the tapered portion in the dead ahead that is arranged on described at least one light source and is arranged on the frame section at described displaying symbol place, wherein said many fiber-optic ends are tied up bunchy and are fixed in the described tapered portion, the shape of described frame section and the shape of described displaying symbol are complementary and comprise a plurality of holes, and every optical fibers is separately fixed in the hole.
In LCD back lighting device described in the utility model, described light guide bundles support further comprises the channel part that is arranged between described tapered portion and the frame section, described channel part comprises a plurality of passages, each passage leads to each hole of frame section respectively from described tapered portion, the described optical fibers of each root is set to respectively in each passage.
In LCD back lighting device described in the utility model, described pcb board comprises the clock circuit that is used to generate clock signal and from described clock circuit receive clock signal and described clock signal is converted to first control module of the drive signal that drives described LCD.
In LCD back lighting device described in the utility model, described pcb board comprises and is used to the temperature sensing device responding to ambient temperature and generate temperature sensor signal and receives described temperature sensor signal and described temperature sensor signal is converted to second control module of the drive signal that drives described LCD from described temperature sensing device; And/or be used to receive the FM FM signal and convert described FM FM signal the frequency modulation device of frequency modulation induced signal to and receive described frequency modulation induced signal and described frequency modulation induced signal is converted to the 3rd control module of the drive signal that drives described LCD from described frequency modulation device.
LCD back lighting device of the present utility model is simple in structure, and the screen area that is illuminated is in the extreme little in fact, is less than 1/10 of whole lcd screen area, even 1/20, so power consumption is few and cost is low.Further, after adopting sensitization resistance, have only externally the bright inadequately or outside LED lamp, therefore power saving more just enabled when not having light source of light source; The product of the LCD back lighting device that such use is so just can use market battery commonly used, need not to be electrically connected with the city, so is easy to carry and moves.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation according to first embodiment of LCD back lighting device of the present utility model;
Fig. 2 is the structural representation according to second embodiment of LCD back lighting device of the present utility model;
Fig. 3 is the structural representation according to the 3rd embodiment of LCD back lighting device of the present utility model;
Fig. 4 is the structural representation according to the 4th embodiment of LCD back lighting device of the present utility model.
Embodiment
Fig. 1 is the structural representation according to first embodiment of LCD back lighting device of the present utility model.As shown in Figure 1, LCD back lighting device of the present utility model comprises pcb board 3, is arranged on the described pcb board 3 and is subjected to described pcb board 3 LCD driven 2, is arranged at least one displaying symbol 1 of described LCD 2 inside.LCD back lighting device of the present utility model also further comprises at least one light source 4 and light guide sheet 8, and described at least one light guide sheet 8 is arranged between described at least one light source 4 and the described displaying symbol 1 and is transmitted to described displaying symbol 1 so that described at least one light source 4 is sent light; Like this, the light that light emitted is come out can be transmitted to displaying symbol 1 by light guide (light guide sheet, light guide plate or light guide bundles), and then shows all or part of of described displaying symbol by pcb board 3 driving LCD.
Those skilled in the art know that described light guide sheet 8 can be extremely thin transparent light guide sheet, so more help the propagation of light and concentrate.In another embodiment of the present utility model, also can adopt light conductor or other light guides.In the present embodiment, this displaying symbol is four 8 shape time showing numerals.In the present embodiment, described LCD back lighting device can comprise 4 LED lamps and 4 light conductor/light guide sheet, and the light that each light conductor/light guide sheet is sent a LED is sent to a displaying symbol.And the shape of the shape of described light conductor/light guide sheet 8 and described displaying symbol 1 is complementary.As shown in Figure 1, this light conductor/light guide sheet 8 can be the taper framework, and its tip is arranged on LED lamp dead ahead, and the shape of open end and 8 shape time showing numerals is complementary.In other embodiment of the present utility model, also can comprise the LED lamp and the light conductor/light guide sheet of other quantity, the utility model is not subjected to the restriction of the quantity of LED lamp, light conductor/light guide sheet and display digit.
Fig. 2 is the structural representation according to second embodiment of LCD back lighting device of the present utility model.In the embodiment shown in Fig. 2, described light guide comprises at least one group of light guide bundles 6, comprises many optical fiberses 7 in described each group light guide bundles 6.One end of described many optical fiberses 7 is tied up bunchy and is fixed on the dead ahead of a LED lamp 22, and the other end is equidistantly arranged each other to constitute the stroke of described displaying symbol 1.In a preferred embodiment of the present utility model, described each group light guide bundles 6 is optical fiber winding displacements.In the embodiment shown in Fig. 2, described at least one light source is meant LED lamp 22, and described at least one LED lamp 22 rear side are provided with collector lens 23, and described light guide bundles 6 is arranged on the focus of described collector lens 23.And all optical fiberses 7 that constitute the stroke of displaying symbol all conduct the light that LED lamp 22 sends.
Fig. 3 is the structural representation according to the 3rd embodiment of LCD back lighting device of the present utility model.As shown in Figure 3, LCD back lighting device of the present utility model promptly comprises internal light source, and just the LED lamp 22, comprise external light source 24 again, just daylight, light or other light sources.In this embodiment, further be provided with sensitization resistance 27 and the light source selected cell (not shown) that is used to detect external light source and generates light source selection signal on the described pcb board 3.Sense extraneous light when strong when sensitization resistance 27, the light source selected cell is promptly selected external light source, and senses extraneous light when more weak when sensitization resistance 27, the light source selected cell selects LED lamp 22 as light source, like this, and in the time of by day, basically need not use the LED lamp, more can power saving.
In the preferred embodiment shown in Fig. 3, this LCD back lighting device also can comprise collector lens 25.This collector lens is arranged between external light source 24 and the LED lamp 22, and light guide bundles or light guide sheet are arranged on focus 26 places of collector lens 25.Like this, the light of LED lamp emission in the time of no matter, still the light that receives from external light source can carry out optically focused by collector lens 25, strengthens its brightness, thereby further saves the energy.This external light source can obtain by perforate on instrument that uses this LCD back lighting device or equipment.In another preferred embodiment of the present utility model, also can adopt prefocus cup to replace collector lens, light source adopts astigmatic LED lamp simultaneously.
Fig. 4 is the structural representation according to the 4th embodiment of LCD back lighting device of the present utility model.As shown in Figure 4, described LCD back lighting device further comprises at least one light guide bundles support 30, described light guide bundles support 30 comprises the tapered portion 31 in the dead ahead that is arranged on described at least one light source 4 and is arranged on the frame section 32 at described displaying symbol place, one end of wherein said many optical fiberses 7 is tied up bunchy and is fixed in the described tapered portion 31, the shape of described frame section 32 and the shape of described displaying symbol are complementary and comprise a plurality of holes, and every optical fibers 7 is separately fixed in the hole.Those skilled in the art know that this optical fibers 7 can be an optical fiber, also can be the fibers that posts light tight film or be coated with glass, plastics or other transparent materials of light non-transmittable layers.
In another preferred embodiment of the present utility model, described light guide bundles support further comprises the channel part that is arranged between described tapered portion 31 and the frame section 32, described channel part comprises a plurality of passages, each passage leads to each hole of frame section 32 respectively from described tapered portion 31, the described optical fibers of each root is set to respectively in each passage.
In other embodiment of the present utility model, also the light guide bundles support can be designed to other shapes, or style, as long as being applicable to, it supports and fixing optical fibers.
Each LCD can be driven and be controlled the demonstration of displaying symbol by pcb board 3:
When this LCD back lighting device is applied to the LCD clock, described pcb board 3 comprises the clock circuit that is used to generate clock signal and converts first control module of the drive signal that drives described LCD 2 to from described clock circuit receive clock signal and with described clock signal, thus the demonstration time.
When this LCD back lighting device is applied to temperature-detecting device, described pcb board 3 comprises and is used to the temperature sensing device responding to ambient temperature and generate temperature sensor signal and receives described temperature sensor signal and convert described temperature sensor signal second control module of the drive signal that drives described LCD 2 to from described temperature sensing device, just can demonstrate variation of ambient temperature.
When this LCD back lighting device is applied to the frequency modulation pick-up unit, be used to receive the FM FM signal and convert described FM FM signal the frequency modulation device of frequency modulation induced signal to and receive described frequency modulation induced signal and convert described frequency modulation induced signal the 3rd control module of the drive signal that drives described LCD to, thereby demonstrate frequency change from described frequency modulation device.
Those skilled in the art are familiar with and can adopt various control methods very much.Just be not repeated at this, known various control methods may be used to the utility model.
LCD back lighting device of the present utility model is simple in structure, and the screen area that is illuminated is in the extreme little in fact, is less than 1/10 of whole lcd screen area, even 1/20, so power consumption is few and cost is low.Further, after adopting sensitization resistance, has only externally the bright inadequately or outside LED lamp of just enabling when not having light source of light source, therefore power saving more, the product of the LCD back lighting device that such use is so just can use market battery commonly used, therefore need not to be electrically connected, be easy to carry and move with the city.
And LCD back lighting device of the present utility model can be applied to every field, and such as the time showing of LCD clock, the temperature of LCD temperature measuring equipment shows, and the frequency of LCD frequency modulation device shows or the like.In addition, those skilled in the art know, except being used for above-mentioned LCD clock, LCD temperature measuring equipment and LCD frequency modulation device, LCD display device of the present utility model also can be used for other fields that need adopt the numeral of LCD demonstration variation, such as a LCD clock temperature device that temperature, time showing are gathered together.According to instruction of the present utility model, those skilled in the art can understand and can be with LCD display device applications of the present utility model in every field.
The utility model is described according to specific embodiment, but it will be understood by those skilled in the art that when not breaking away from the utility model scope, can carry out various variations and be equal to replacement.In addition, for adapting to the specific occasion or the material of the utility model technology, can carry out many modifications and not break away from its protection domain the utility model.Therefore, the utility model is not limited to specific embodiment disclosed herein, and comprises that all drop into the embodiment of claim protection domain.
Claims (10)
1. a LCD back lighting device comprises pcb board (3), is arranged on described pcb board (3) and goes up and be subjected to described pcb board (3) LCD driven (2), is arranged on inner at least one displaying symbol (1) of described LCD (2); It is characterized in that, further comprise at least one light source (4) and at least one light guide, described at least one light guide is arranged between described at least one light source (4) and the described displaying symbol (1) and is transmitted to described displaying symbol (1) so that described at least one light source (4) is sent light.
2. LCD back lighting device according to claim 1 is characterized in that, described light guide comprises at least one light guide sheet (8), and the shape of the shape of described light guide sheet (8) and described displaying symbol (1) is complementary.
3. LCD back lighting device according to claim 1, it is characterized in that, described light guide comprises at least one group of light guide bundles (6), comprise many optical fiberses (7) in described each group light guide bundles (6), one end of described many optical fiberses (7) is tied up bunchy and is fixed on the dead ahead of at least one light source (4), and the other end is equidistantly arranged each other to constitute the stroke of described displaying symbol (1).
4. LCD back lighting device according to claim 3 is characterized in that, described each group light guide bundles (6) is the optical fiber winding displacement.
5. LCD back lighting device according to claim 1, it is characterized in that, described at least one light source (4) comprises at least one LED lamp (22), and described at least one LED lamp (22) rear side is provided with collector lens (23), and described light guide is arranged on the focus of described collector lens (23).
6. LCD back lighting device according to claim 1 or 5, it is characterized in that, described at least one light source (4) comprises external light source (24), is provided with collector lens (23) between described external light source (24) and the described light guide, and described light guide is arranged on the focus of described collector lens.
7. LCD back lighting device according to claim 6, it is characterized in that, further be provided with on the described pcb board (3) be used to detect external light source and generate sensitization resistance that light source selects signal with link to each other with described sensitization resistance with receive described light source selection signal and select described at least one LED lamp (22) or external light source (24) as the light source selected cell of light source.
8. LCD back lighting device according to claim 3, it is characterized in that, described LCD back lighting device further comprises at least one light guide bundles support (30), described light guide bundles support (30) comprises the tapered portion (31) in the dead ahead that is arranged on described at least one light source (4) and is arranged on the frame section (32) at described displaying symbol place, one end of wherein said many optical fiberses (7) is tied up bunchy and is fixed in the described tapered portion (31), the shape of described frame section (32) and the shape of described displaying symbol are complementary and comprise a plurality of holes, and every optical fibers (7) is separately fixed in the hole.
9. according to the described LCD back lighting device of arbitrary claim among the claim 1-5,7 and 8, it is characterized in that described pcb board (3) comprises the clock circuit that is used to generate clock signal and from described clock circuit receive clock signal and described clock signal is converted to first control module of the drive signal that drives described LCD (2).
10. LCD back lighting device according to claim 9, it is characterized in that described pcb board (3) comprises and is used to the temperature sensing device responding to ambient temperature and generate temperature sensor signal and receives described temperature sensor signal and described temperature sensor signal is converted to second control module of the drive signal that drives described LCD (2) from described temperature sensing device; And/or be used to receive the FM FM signal and convert described FM FM signal the frequency modulation device of frequency modulation induced signal to and receive described frequency modulation induced signal and described frequency modulation induced signal is converted to the 3rd control module of the drive signal that drives described LCD (2) from described frequency modulation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202057437U CN201600531U (en) | 2009-09-30 | 2009-09-30 | Lcd backlight device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202057437U CN201600531U (en) | 2009-09-30 | 2009-09-30 | Lcd backlight device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201600531U true CN201600531U (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202057437U Expired - Fee Related CN201600531U (en) | 2009-09-30 | 2009-09-30 | Lcd backlight device |
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| CN (1) | CN201600531U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113272882A (en) * | 2020-09-02 | 2021-08-17 | 祝君芬 | LCD and LED mixed display screen and LCD and LED mixed screen clock |
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2009
- 2009-09-30 CN CN2009202057437U patent/CN201600531U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113272882A (en) * | 2020-09-02 | 2021-08-17 | 祝君芬 | LCD and LED mixed display screen and LCD and LED mixed screen clock |
| WO2022047667A1 (en) * | 2020-09-02 | 2022-03-10 | 祝君芬 | Lcd and led hybrid display screen and lcd and led hybrid screen clock |
| CN113272882B (en) * | 2020-09-02 | 2022-11-29 | 祝君芬 | LCD and LED mixed display screen and LCD and LED mixed screen clock |
| US12001173B2 (en) | 2020-09-02 | 2024-06-04 | Yuguang Lin | LCD and led hybrid display screen and LCD and led clock with LCD and led hybrid display screen |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101006 Termination date: 20120930 |