CN1568120A - Luminescent module and keyboard using same - Google Patents

Luminescent module and keyboard using same Download PDF

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Publication number
CN1568120A
CN1568120A CN 03147174 CN03147174A CN1568120A CN 1568120 A CN1568120 A CN 1568120A CN 03147174 CN03147174 CN 03147174 CN 03147174 A CN03147174 A CN 03147174A CN 1568120 A CN1568120 A CN 1568120A
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China
Prior art keywords
light
lead
emitting
end points
power
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Granted
Application number
CN 03147174
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Chinese (zh)
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CN100482028C (en
Inventor
林志南
许鸿章
许建士
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Darfon Electronics Corp
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Darfon Electronics Corp
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Priority to CNB031471749A priority Critical patent/CN100482028C/en
Publication of CN1568120A publication Critical patent/CN1568120A/en
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Publication of CN100482028C publication Critical patent/CN100482028C/en
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Abstract

The invention is a light-emitting module. It includes: the first power supply wire connects to the first power supply node, the second power supply wire connects to the second power supply node; several light emitting device, the first end point and the second end point of every light emitting device connects to the first and the second power wire. And the first power supply wires located randomly between the adjacent first end points have the same length; the second power supply wires located randomly between the adjacent second end points have the same length. From the first power supply node, through any single light emitting device, to the second power node, the length passed through is the same. Moreover, the keyboard to use the light-emitting module is also disclosed.

Description

The keyboard of light emitting module and utilization light emitting module
Technical field
The present invention is relevant for a kind of light emitting module, particularly relevant for a kind of light emitting module that can make the light-emitting component uniformly light-emitting in the light emitting module; Wherein, and openly use the keyboard of described light emitting module.
Background technology
Along with popularizing of computer, computer might use under various environment, for example in the occasion of insufficient light; In order to satisfy described demand, proposition can luminous voluntarily keyboard.
Routine techniques is under keyboard, and a plurality of light-emitting diodes are set, and by the brightness that light-emitting diode sent, makes keyboard luminous; Fig. 1 represents custom circuit.As shown in the figure, the total impedance on each current path is all inequality, with the process LED 1Current path I 1Be example, by power supply V is provided CCTo holding between the Gnd, through resistance R with reference to ground 1, R 11, R 21And the LED of flowing through 6Current path I 2Through resistance R 1-R 6, R 16, R 26-R 21Because the resistance value on the current path of each single light-emitting diode of flowing through is all inequality, so it is also inequality to flow through the size of current of each light-emitting diode, makes the brightness of each light-emitting diode differ, so cause the phenomenon of keyboard non-uniform light.
Summary of the invention
In view of this, purpose of the present invention is for providing a kind of light emitting module, by the impedance of control light emitting module inside, makes the light-emitting component in the light emitting module can uniformly light-emitting.
Another object of the present invention can be improved its illumination effect for a kind of illuminated keyboard is provided, and makes the keyboard uniformly light-emitting.
For achieving the above object, the invention provides a kind of light emitting module, comprising: one first power lead is connected to one first power supply node; One second source lead is connected to a second source node; A plurality of light-emitting devices, one first end points and one second end points of each light-emitting device are connected respectively to first and second power leads; Wherein, first power lead that is provided with between adjacent first end points of two-phase in office all has equal lengths, and the second source lead that is provided with between adjacent second end points of two-phase in office all has equal lengths; And begin by first power supply node, through single any light-emitting device and arrive the second source node, the total length of first and second power leads of process equate.
Described light-emitting device comprises: one the 3rd power lead is connected to first end points; One the 4th power lead is connected to second end points; A plurality of light-emitting components, one first end and one second end of each light-emitting component are connected respectively to third and fourth power lead; Wherein, first power lead that connects wantonly two adjacent first ends all has equal lengths, and the second source lead that connects wantonly two adjacent second ends all has equal lengths; And begin by first end points, through single any light-emitting component and arrive second end points, the total length of third and fourth power lead of process equate.
For reaching above-mentioned another purpose, the present invention also provides a kind of illuminated keyboard, comprising: a keyboard device has a base plate and at least one button, wherein button is arranged on the base plate in the mode that base plate relatively moves up and down, and base plate has first and second power lead; And, a plurality of light-emitting devices, first end points of each light-emitting device connects first power lead, and its second end points connects the second source lead.
Wherein, first power lead that is provided with between adjacent first end points of two-phase in office all has equal lengths, and the second source lead that is provided with between adjacent second end points of two-phase in office all has equal lengths; And begin by first power supply node, through single any light-emitting device and arrive the second source node, the total length of first and second power leads of process equate.
For above-mentioned and other purposes of the present invention, feature and advantage can be become apparent, below enumerate preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 represents custom circuit.
Fig. 2 represents light emitting module schematic diagram of the present invention.
Fig. 3 represents the equivalent circuit diagram of light emitting module of the present invention.
Fig. 4 represents the schematic internal view of light-emitting device.
Fig. 5 represents the schematic internal view of light-emitting device.
Fig. 6 represents the schematic diagram of 3*3 illuminated keyboard.
Symbol description
10: base plate; 12: the first power leads; 14: the second source lead;
16: light emitting module; 100: light-emitting component;
Node1: first power supply node; Node2: second source node;
R 1-1-R 1-m、R 2-1-R 2-m、R 3-1-R 3-m、R 4-1-R 4-m、
R D1-1-R D1-m、R D2-1-R D2-m、
R D3-1-R D3-m, R D4-1-R D4-m: resistance;
D 1-D m: light-emitting device;
LED 1-LED 6: light-emitting diode.
Embodiment
Fig. 2 represents light emitting module schematic diagram of the present invention.As shown in the figure, the first power lead A is connected to one first power supply node Node1; Second source lead B is connected to a second source node Node2; A plurality of light-emitting device D 1-D m, each light-emitting device D 1-D mOne first end points T 1With one second end points T 2Be connected respectively to the first power lead A and second source lead B.
Wherein, the adjacent light-emitting device D of two-phase in office is set 1-D mFirst power lead between first end points all has equal lengths L 1-1=L 1-2=...=L 1-m, LD 1-1=LD 1-2=...=LD 1-m, the adjacent light-emitting device D of two-phase in office is set 1-D mSecond source lead between second end points all has equal lengths LD 2-1=LD 2-2=...=LD 2-m, L 2-1=L 2-2=...=L 2-mAnd begin by the first power supply node Node1, through single any light-emitting device and arrive second source node Node2, the first power lead A of process and the total length of second source lead B equate, so L 1-1=L 1-2=...=L 1-m=L 2-1=L 2-2=...=L 2-m
Fig. 3 represents the equivalent circuit diagram of light emitting module of the present invention.As shown in the figure, resistance R 1-1-R 1-m, R D1-1-R D1-m, R D2-1-R D2-m, R 2-1-R 2-mRepresent circuit layout cabling (track) equivalent resistance of light emitting module, the resistance of described resistance is determined that by the length of cabling when cabling was long more, then its equiva lent impedance was big more, so work as resistance R 1-1=...=R 1-m=R 2-1=...=R 2-m, R D1-1=...=R D1-m, R D2-1=...=R D2-mThe time, then by the first power supply node Node1 to second source node Node2 the track lengths of process equate.
For example, suppose resistance R 1-1=...=R 1-m=R 2-1=...=R 2-m=2R; R D1-1=...=R D1-m=R; R D2-1=...=R D2-mDuring=R, then by the first power supply node Node1 light-emitting device D that flows through 1Current path I to second source node Node2 3Can pass through resistance R 1-1, R D1-1, R D2-1, R 2-1-R 2-m, its total resistance is 2R+R+R+2R*m, wherein, m is a resistance R 2-1-R 2-mTotal quantity; In addition, by the first power supply node Node1 light-emitting device D that flows through mCurrent path I to second source node Node2 4Can pass through resistance R 1-1-R 1-m, RD 1-m, RD 2-m, R 2-m, its total resistance is 2R*m+R+R+2R; The rest may be inferred for other.
So the total resistance of the current path of all single light-emitting devices of flowing through of the present invention is all identical, make that the size of current that flows through each light-emitting device is also identical, so, just can obtain all identical light-emitting device of luminosity.
Fig. 4 represents the schematic internal view of light-emitting device.Because the schematic internal view of each light-emitting device is all identical, so at this, only with light-emitting device D 1As representative.As shown in the figure, light-emitting device D 1Comprise: one the 3rd power lead C is connected to the first end points T 1One the 4th power lead D is connected to the second end points T 2A plurality of light-emitting components, at this with LED 1-LED mBe example, the cathode terminal of each light-emitting diode and anode tap are connected respectively to the 3rd power lead C and the 4th power lead D.
Wherein, connect the wantonly two adjacent first end T 1The first power lead A all have equal lengths, connect the wantonly two adjacent second end T 2Second source lead B all have equal lengths; And by the first end points T 1Beginning arrives the second end points T through single any light-emitting diode 2, the total length of the 3rd power lead C of process and the 4th power lead D equate.
Fig. 5 represents the schematic internal view of light-emitting device.As shown in the figure, resistance R 3-1-R 3-m, R D3-1-RD 3-m, R D4-1-R D4-m, R 4-1-R 4-mRepresent circuit layout cabling (track) equivalent resistance of light-emitting device, the resistance of described resistance is determined that by the length of cabling when cabling was long more, then its equiva lent impedance was big more, so work as resistance R 3-1=...=R 3-m=R 4-1=...=R 4-m, R D3-1=...=R D3-m, R D4-1=...=RD 4-mThe time, then by the first electricity end T 1To the second end T 2The track lengths of process equate.In addition, identical through the total resistance on the current path of single light-emitting diode with total resistance algorithm on the current path of the single light-emitting device of above-mentioned process, so repeat no more
General keyboard has a base plate and at least one button, and wherein button is arranged on the base plate in the mode of moving up and down with base plate relatively; And the luminous light-emitting component of keyboard also is arranged on the base plate.Fig. 6 represents the schematic diagram of 3*3 illuminated keyboard.Light emitting module of the present invention can have a plurality of light-emitting diodes, but because this figure is the illuminated keyboard of explanation 3*3, so at 3 light emitting modules, each light emitting module has 3 light-emitting diodes and is illustrated; As shown in the figure, base plate 10 has one first power lead 12 and second source lead 14; In the present embodiment, each light- emitting device 16,18 and 20 is connected between first power lead 12 and the second source lead 14.First power lead 12 and second source lead 14 length between each light-emitting device are identical.
Wherein, each light emitting module has 3 light-emitting diodes, each light-emitting diode 100 is arranged between a button (not shown) and the base plate 10 one to one, so the quantity of light-emitting diode 100 is identical with number of keys, the cathode terminal of light-emitting diode 100 is connected first power lead 12, and anode tap connects second source lead 14; The cathode terminal of each light-emitting diode 100 is connected to the equal in length of first power lead 12, and the length that the anode tap of each light-emitting diode 100 is connected to second source lead 14 also equates; In addition, first power lead 12 connects power Vcc, second source lead 14 earth terminal Gnd.
Because each light emitting module is identical with second source lead 14 length with first power lead 12, also can be identical so flow to the electric current of each light emitting module; And the cathode terminal of each light-emitting diode in the light emitting module is identical with the length of first power lead 12, its anode tap is also identical with the length of second source lead 14, so flowing to the electric current of each light-emitting diode also can be identical, so the brightness of each light-emitting diode is identical, uses obtaining an illuminated keyboard with uniformly light-emitting function.
Though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can change and retouching, so protection scope of the present invention is as the criterion with the claim restricted portion that is proposed.

Claims (10)

1. light emitting module comprises:
One first power lead is connected to one first power supply node;
One second source lead is connected to a second source node;
A plurality of light-emitting devices, one first end points and one second end points of each described light-emitting device are connected respectively to described first and second power leads;
Wherein, described first power lead that is provided with between adjacent described first end points of two-phase in office all has equal lengths, and the described second source lead that is provided with between adjacent described second end points of two-phase in office all has equal lengths; And begin by described first power supply node, through single any described light-emitting device and arrive described second source node, the total length of described first and second power leads of process equate.
2. light emitting module as claimed in claim 1, wherein, each described light-emitting device comprises:
One the 3rd power lead is connected to described first end points;
One the 4th power lead is connected to described second end points;
A plurality of light-emitting components, one first end and one second end of each described light-emitting component are connected respectively to described third and fourth power lead;
Wherein, described first power lead that connects wantonly two adjacent described first ends all has equal lengths, and the described second source lead that connects wantonly two adjacent described second ends all has equal lengths; And begin by described first end points, through single any described light-emitting component and arrive described second end points, the total length of described third and fourth power lead of process equate.
3. light emitting module as claimed in claim 1, wherein, described first power lead is a high potential, described second source lead is an electronegative potential.
4. light emitting module as claimed in claim 3, wherein, described light-emitting device is a light-emitting diode, and its anode connects described first power line, and its negative electrode connects described second source line.
5. light emitting module as claimed in claim 2, wherein, the described first and the 3rd power lead is a high potential, the described second and the 4th power lead is an electronegative potential.
6. light emitting module as claimed in claim 5, wherein, described light-emitting component is a light-emitting diode, and its anode connects described first power line, and its negative electrode connects described second source line.
7. illuminated keyboard comprises:
One keyboard device has a base plate and at least one button, and wherein said button is arranged on the described base plate in the mode that can described relatively base plate moves up and down, and described base plate has first and second power lead; And
A plurality of light-emitting devices, first end points of each described light-emitting device connects described first power lead, and its second end points connects described second source lead;
Wherein, described first power lead that is provided with between adjacent described first end points of two-phase in office all has equal lengths, and the described second source lead that is provided with between adjacent described second end points of two-phase in office all has equal lengths; And begin by described first power supply node, through single any described light-emitting device and arrive described second source node, the total length of described first and second power leads of process equate.
8. illuminated keyboard as claimed in claim 7, wherein, described first power lead is a high potential, described second source lead is an electronegative potential.
9. illuminated keyboard as claimed in claim 7, wherein, described light-emitting device is a light-emitting diode, and its anode connects described first power lead, and its negative electrode connects described second source lead.
10. illuminated keyboard as claimed in claim 7, these a plurality of light-emitting devices are arranged on the button below in man-to-man mode.
CNB031471749A 2003-07-08 2003-07-08 Luminescent module and keyboard using the same Expired - Lifetime CN100482028C (en)

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Application Number Priority Date Filing Date Title
CNB031471749A CN100482028C (en) 2003-07-08 2003-07-08 Luminescent module and keyboard using the same

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Application Number Priority Date Filing Date Title
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CN1568120A true CN1568120A (en) 2005-01-19
CN100482028C CN100482028C (en) 2009-04-22

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102341640A (en) * 2009-03-05 2012-02-01 夏普株式会社 Light emitting module, light emitting module unit and backlight system
CN103108996A (en) * 2010-09-17 2013-05-15 力拓艾尔坎国际有限公司 Electrical connection device, for connecting between two successive cells of a series of cells for the production of aluminium
CN108777902A (en) * 2018-08-02 2018-11-09 骆武宁 Connection method and the low-loss LED light of tunable optical are pressed in a kind of constant current of LED light
CN112596300A (en) * 2020-12-16 2021-04-02 Tcl华星光电技术有限公司 Backlight module and display device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102341640A (en) * 2009-03-05 2012-02-01 夏普株式会社 Light emitting module, light emitting module unit and backlight system
CN102341640B (en) * 2009-03-05 2014-03-12 夏普株式会社 Light emitting module, light emitting module unit and backlight system
CN103108996A (en) * 2010-09-17 2013-05-15 力拓艾尔坎国际有限公司 Electrical connection device, for connecting between two successive cells of a series of cells for the production of aluminium
CN103108996B (en) * 2010-09-17 2016-06-29 力拓艾尔坎国际有限公司 For the electric connecting device between two succeeding vats of the series of grooves of aluminum production
CN108777902A (en) * 2018-08-02 2018-11-09 骆武宁 Connection method and the low-loss LED light of tunable optical are pressed in a kind of constant current of LED light
CN112596300A (en) * 2020-12-16 2021-04-02 Tcl华星光电技术有限公司 Backlight module and display device
WO2022126737A1 (en) * 2020-12-16 2022-06-23 Tcl华星光电技术有限公司 Backlight module and display apparatus
US20220342260A1 (en) * 2020-12-16 2022-10-27 Tcl China Star Optoelectronics Technology Co., Ltd. Backlight module and display device
US11977296B2 (en) * 2020-12-16 2024-05-07 Tcl China Star Optoelectronics Technology Co., Ltd. Backlight module and display device

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