CN2383085Y - Back light lighting device for liquid crystal displayer - Google Patents
Back light lighting device for liquid crystal displayer Download PDFInfo
- Publication number
- CN2383085Y CN2383085Y CN 99232059 CN99232059U CN2383085Y CN 2383085 Y CN2383085 Y CN 2383085Y CN 99232059 CN99232059 CN 99232059 CN 99232059 U CN99232059 U CN 99232059U CN 2383085 Y CN2383085 Y CN 2383085Y
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- liquid crystal
- emitting diode
- lighting device
- model
- light emitting
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Abstract
The utility model relates to a backlight illumination device for a liquid crystal display. The utility model is characterized in that a supporting structure is arranged on the back face or the side face of a display panel of the liquid crystal display, a luminescence structure which is composed of light emitting diodes is arranged on the utility model, and the luminescence structure is directly connected with a power source of a location circuit of a working part which is needed to be carried out display and observation in a parallel connection mode.
Description
The utility model relates to the backlight liquid crystal display lighting device that is used for electronic equipment or system.
The application of LCD is day by day extensive now, and is little of wrist-watch, telephone set, greatly to all adopting to some extent on many instrument and equipments.Because LCD itself can't be luminous, therefore under insufficient light or night situation,, must provide light source or illumination by means of the external world for the shown content of display is observed.Be head it off, at notification number is that CN2158095 has reported the background tabula rasa that a kind of liquid crystal display uses in to Chinese patent literature, adopt be at the display back side with light emitting diode and the mode that the reflecting surface structure of appropriate format matches, make light deflection dispersion after reflection realize in the bias light district throwing light on.In notification number is the Chinese patent literature of CN2302577, then reported a kind of LCD noctilucence structure in addition, employing be the version that light guide plate, diffusion sheet and luminous plate are set below LCD.The structure of these backlighting arrangements is all comparatively complicated, need occupy bigger work space.In addition, used backlighting arrangement also has a weak point to be at present, it must need the dedicated illumination power supply that battery or alternate manner provide, or after need being set in former operating circuit, additional special-purpose backlight power device powers by the operating circuit power supply, these obviously all make complex structure, and inconvenient; Backlighting arrangement directly is serially connected with in the operating circuit that need show observation by its power supply, but will inevitably be influential, sometimes even can cause bigger adverse effect the operating voltage or the electric current of operating circuit.Telephone set with band LCD commonly used is an example, if use the audio-frequency current that provides by telecommunication bureau or voltage as its backlight liquid crystal display mains lighting supply, because the operating voltage or the electric current itself that are provided are very limited, and the required power consumption of its lighting circuit work is kept constant relatively, therefore under voltage fluctuation or some other situation, when guaranteeing this lighting circuit work, will certainly cause adverse effect to speech quality.In other field, also have similar situation.
Given this, the purpose of this utility model is to provide a kind of power supply power supply that both can directly utilize this working portion place circuit that need show observation for addressing the above problem, and what can not have a negative impact to the operate as normal of this operating circuit again is used for the backlight liquid crystal display lighting device.
The structure that the utility model is used for the backlight liquid crystal display lighting device is, displaying plate face or side in LCD are provided with supporting structure, it is provided with the ray structure that is made of light emitting diode, and this ray structure is directly connected on the power supply of the working portion place circuit that need show observation with parallel way.Here said need show the power supply of the working portion place circuit of observation, this working portion of illuminated demonstration is optionally decided at the equipment at its place or the physical circuit position in the system: if this working portion of the illuminated demonstration of these needs is located immediately in the main operating circuit of its place equipment or system, said this ray structure promptly should be directly parallel on the power supply of this main operating circuit at its place; If this working portion of the illuminated demonstration of these needs is a certain forked working circuit that is arranged in its place equipment or system, said this ray structure then should be directly parallel on the power supply of this forked working circuit at its place.Said herein ray structure, both can use an independent light emitting diode, also can be by the form of forming with the interconnective a plurality of light emitting diodes of serial or parallel connection form, can also make said ray structure is at least by the light-emitting diode group parallel with one another light emitting diode matrix forms that form of two row with series connection.
The inventor of present patent application finds that various types of light emitting diodes can also have suitable pressure stabilization function and function when realizing its lighting function under a stable condition in work and experiment.Gallium arsenide phosphide gallium phosphide LED with multiple model commonly used is an example, volt-ampere characteristic during by its operate as normal can be known and find out, when the forward working current when its work changes in 20 milliamperes to 50 milliamperes scopes, the variation of its forward voltage drop only is 0.2 volt, and when its forward working current continues to increase, the amplitude of variation of forward voltage drop also will reduce rapidly.This has clearly illustrated that promptly it can have the effect of tangible stable operating voltage in certain condition or scope.And this characteristic and effect are also confirmed by present patent application inventor's work and experiment.The basis of the backlighting arrangement that the utility model is above-mentioned has made full use of this characteristic of light emitting diode just.Light emitting diode in the ray structure of above-mentioned backlighting arrangement is when reality is used; no matter be single or a plurality of; connected mode is series connection or parallel connection or is array format; because on its all be to be directly connected in the working portion place circuit that this need show observation power supply of---no matter this circuit is main circuit or branch circuit---with parallel way; so used electric energy of ray structure in this luminous lighting branch road in parallel; it is the electric energy of the remainder after guaranteeing the required electric energy of this working portion circuit operate as normal; even normal or abnormal fuctuation within a narrow range takes place in the curtage of this working portion place circuit within the specific limits; make the lighting current that enters in the luminous lighting branch road also produce corresponding variation; but these variations and fluctuation not only can not influence the voltage at itself and operating circuit parallel connected end place; also can make the voltage at this parallel connected end place can not produce tangible fluctuation on the contrary within the specific limits; thereby to its voltage of operating circuit at working portion place in parallel stablized; reach the desired power supply of operating circuit self power supply, the result that can not have a negative impact again of both can directly having utilized in the utility model foregoing invention purpose to the work of this operating circuit.Can realize and stable concrete magnitude of voltage as for this luminous lighting structure, can according to the operating voltage of main operating circuit require and in the luminous lighting structure type or the model of actual employed light emitting diode, realize by quantity and/or the connected mode of adjusting used light emitting diode in the luminous lighting structure.
Below foregoing of the present utility model is further described with example shown in the drawings.But this should be interpreted as that the scope of the above-mentioned theme of the utility model only limits to following example.
Fig. 1 is the synoptic diagram of a kind of structure of the utility model LCD backlight lighting device.
Fig. 2 is the synoptic diagram of the another kind of structure of the utility model LCD backlight lighting device.
Fig. 3 is the synoptic diagram of a kind of circuit structure in the utility model LCD backlight lighting device.
In this backlight liquid crystal display lighting device as shown in the figure, the back side at the display board 1 of LCD is provided with board-like supporting structure 2---as shown in Figure 1, or be provided with the supporting structure 2 of strip in the side of the display board 1 of LCD---as shown in Figure 2.For example can adopt glass plate or glass bar, or the supporting structure spare of other appropriate configuration form.On it with set, bonding or be provided with the ray structure 3 that constitutes by light emitting diode by modes such as web members, and this ray structure 3 is directly connected on the power supply of the working portion place circuit that need show observation with parallel way.According to the real work voltage needs of this operating circuit, this ray structure 3 can be for by two row or the multiple row form with the light-emitting diode group light emitting diode matrix that forms parallel with one another that become of series connection.In circuit structure shown in Figure 4, this luminous lighting structure 3 is to be composed in parallel by the identical light-emitting diode group of five row, and every row light-emitting diode group is in series mutually by the light emitting diode of four same model.
Claims (2)
1. be used for the backlight liquid crystal display lighting device, it is characterized in that being provided with supporting structure in the displaying plate face or the side of LCD, it is provided with the ray structure that is made of light emitting diode, and this ray structure is directly connected on the power supply of the working portion place circuit that need show observation with parallel way.
2. the backlight liquid crystal display lighting device that is used for as claimed in claim 1 is characterized in that said ray structure is at least by the light-emitting diode group parallel with one another light emitting diode matrix forms that form of two row with series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99232059 CN2383085Y (en) | 1999-07-09 | 1999-07-09 | Back light lighting device for liquid crystal displayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99232059 CN2383085Y (en) | 1999-07-09 | 1999-07-09 | Back light lighting device for liquid crystal displayer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2383085Y true CN2383085Y (en) | 2000-06-14 |
Family
ID=34020812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99232059 Expired - Fee Related CN2383085Y (en) | 1999-07-09 | 1999-07-09 | Back light lighting device for liquid crystal displayer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2383085Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532630A (en) * | 2003-12-26 | 2009-09-16 | 夏普株式会社 | Backlight and liquid crystal display device |
| CN1896586B (en) * | 2005-07-15 | 2011-06-15 | 三星Led株式会社 | Surface light source using led and backlight unit having the surface light source |
-
1999
- 1999-07-09 CN CN 99232059 patent/CN2383085Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532630A (en) * | 2003-12-26 | 2009-09-16 | 夏普株式会社 | Backlight and liquid crystal display device |
| CN1896586B (en) * | 2005-07-15 | 2011-06-15 | 三星Led株式会社 | Surface light source using led and backlight unit having the surface light source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |