CN208970088U

CN208970088U - A kind of LED light source module and LED digital display

Info

Publication number: CN208970088U
Application number: CN201822015643.XU
Authority: CN
Inventors: 曾维燕; 张金龙; 曾友华
Original assignee: Xiamen Hualian Electronics Co Ltd
Current assignee: Xiamen Hualian Electronics Co Ltd
Priority date: 2018-12-03
Filing date: 2018-12-03
Publication date: 2019-06-11
Anticipated expiration: 2028-12-03

Abstract

The utility model relates to LED technology fields.The utility model discloses a kind of LED light source module and LED digital displays, wherein, LED light source module includes printed board and the LED core blade unit being arranged in printed board, LED core blade unit includes the first LED chip and the second LED chip of reverse parallel connection, the first end of first LED chip and the second LED chip is electrically connected the first end as LED core blade unit, the second end of second LED chip is electrically connected the second end as LED core blade unit with the second end of the first LED chip by normally closed switch, printed board is equipped with first line and the second route, the first end of LED core blade unit is connect by first line with the first control output end for controlling chip, the second end of LED core blade unit is connect by the second route with the second control output end for controlling chip, printing The first testing weld pad, the second testing weld pad and third testing weld pad being electrically connected respectively with the second end of first line, the second route and the second LED chip are additionally provided on plate.

Description

A kind of LED light source module and LED digital display

Technical field

The utility model belongs to LED technology field, more particularly to a kind of LED light source module and has the LED light source mould The LED digital display of block.

Background technique

LED digital display is a kind of semiconductor devices that number display is shown with function, and household electrical appliances are especially in electric appliance Field is using extremely wide, such as air-conditioning, water heater, refrigerator.Conventional LED digital display mainly by printed board, reflector, The composition such as pin, panel and LED light as light-emitting component.Currently, LED digital display develops towards integrated direction. Integrated LED digital display with components such as driving IC, capacitor, resistance, touch springs occurs successively.On the one hand The integrated of display can make entire household appliances more frivolous, on the other hand household electrical appliances manufacturer can also be reduced various The process of assembly, improve production efficiency also improve simultaneously may cause in production process damage risk (such as electrostatic damage, Mechanical damage etc.), improve the reliability of product.

The LED light positive and negative polarities placed in conventional LED digital display have corresponding pin to draw, and pass through detector Device applies test electric current and backward voltage on pin can test the forward voltage, reverse leakage current, luminous intensity of every LED lamp With the photoelectric parameters such as wavelength, therefore, it is determined that whether every LED good.However, the LED digital display of existing integrated IC package In every LED both ends there is no corresponding two outer pins, and be directly on the I/O mouth of control IC, and controlled IC's Exit is the port of some signal controls, can not be directly corresponding with every LED.Currently, being utilized to promote the I/O of IC mouth Rate, the I/O mouth of many IC is designed to that the LED light of positive inverse parallel access can be driven, when the LED light number that LED digital display uses Amount be more than IC not positive-negative connected controllable quantity when or increase IC usage quantity or the LED light that will exceed and its The positive and negative I/O mouth for being coupled in parallel to IC of its LED light.The former can avoid the I/O mouth of the positive inverse parallel access IC of LED light, by printing Increasing sensing point scheme in making sheet may be implemented the light such as forward voltage, reverse leakage current, luminous intensity and the wavelength of every LED lamp The test of electrical parameter, but the I/O mouth utilization rate of IC is reduced, it is at high cost；If selecting the latter, with the I/O mouth for being effectively utilized IC, But the reverse leakage current of LED light is unable to test (because the backward voltage to a LED lamp is the positive electric of another LED light Pressure, and positive operating voltage is less than the voltage that reverse leakage current test applies, when negative testing voltage is also not up to, and Couple into the forward current of an other LED lamp have been over the upper limit value of reverse leakage, to be unable to test reality LED light reverse leakage current), as this kind of bad of electrostatic soft breakdown can not just detected, there is very big hidden danger of quality.

Summary of the invention

The purpose of this utility model is to provide a kind of LED light source modules and LED digital display to solve above-mentioned deposit The problem of.

To achieve the above object, the technical solution adopted in the utility model are as follows: a kind of LED light source module, including printed board And the LED core blade unit in printed board is set, the LED core blade unit includes the first LED chip and the of reverse parallel connection The first end of two LED chips, first LED chip and the second LED chip is electrically connected the first end as LED core blade unit, The second end of second LED chip is electrically connected with the second end of the first LED chip by normally closed switch as LED core blade unit Second end, the printed board is equipped with first line and the second route, and the first end of the LED core blade unit passes through First Line Road is connect with the first control output end of control chip, and the second end of the LED core blade unit passes through the second route and control core Second control output end of piece connects, be additionally provided in the printed board respectively with first line, the second route and the second LED chip Second end electrical connection the first testing weld pad, the second testing weld pad and third testing weld pad.

Further, the normally closed switch is normal closed light touch switch.

Further, the normally closed switch is the normal closed light touch switch of patch type, is arranged in printed board.

Further, the quantity of the LED core blade unit is multiple, and multiple LED core blade units use matrix connection type It is attached, the first line and the second route are respectively as column line and row line.

Further, the printed board is additionally provided with tertiary circuit, all 2nd LED corresponding to the second route of same The second end of chip is electrically connected with same tertiary circuit, and the tertiary circuit passes through normally closed switch and corresponding second route Electrical connection, the third testing weld pad are electrically connected with tertiary circuit.

Further, the control chip is arranged in printed board.

The invention also discloses a kind of LED digital displays, including above-mentioned LED light source module.

The advantageous effects of the utility model:

The LED core blade unit of the utility model includes the first LED chip and the second LED chip of reverse parallel connection, effectively benefit The I/O mouth of chip is controlled, the quantity of control chip is reduced, reduces cost, while passing through setting the first testing weld pad, second The photoelectric parameter for individually testing every LED chip may be implemented in testing weld pad, third testing weld pad and normally closed switch, including Reverse leakage current improves the reliability of product.In addition, being convenient for test operation using the normal closed light touch switch of patch type.

Detailed description of the invention

Fig. 1 is the circuit diagram of the LED light source module of the utility model specific embodiment；

Fig. 2 is the partial schematic diagram of the printed board of the LED light source module of the utility model specific embodiment.

Specific embodiment

Now in conjunction with the drawings and specific embodiments, the present invention will be further described.

As illustrated in fig. 1 and 2, a kind of LED light source module, including printed board 1 and the LED chip being arranged in printed board 1 Unit 6 and control chip U1, the LED core blade unit 6 include the first LED chip 61 and the second LED chip 62 of reverse parallel connection, First end (anode) electrical connection of the first end (negative terminal) and the second LED chip 62 of first LED chip 61 is used as LED chip The first end of unit 6, the second end (negative terminal) of second LED chip 62 pass through normally closed switch 2 and the first LED chip 61 the Two ends (anode) are electrically connected the second end as LED core blade unit 6, and the printed board 1 is equipped with first line 7 and the second route 8, the first end of the LED core blade unit 6 by first line 7 and controls (I/O mouthfuls) of the first control output end of chip U1 even It connects, the second end of the LED core blade unit 6 is connected by (I/O mouthfuls) of the second control output end of the second route 8 and control chip U1 It connects, is additionally provided in the printed board 1 and is electrically connected respectively with the second end of first line 7, the second route 8 and the second LED chip 62 The first testing weld pad 3, the second testing weld pad 4 and third testing weld pad 5.

In this specific embodiment, the quantity of LED core blade unit 6 is 15, but not limited to this, 15 LED core blade units 6 are adopted Be attached with matrix connection type, as shown in Figure 1, the other single LED chips of 15 LED core blade units 6 and 49 connect into 8 × 8 matrix, the first line 7 and the second route 8 are respectively as column line and row line, the first line 7 and the second line The quantity on road 8 is 8, and 8 first line 7 are connect with 8 column control output ends (R1-R8) of control chip U1 respectively, and 8 Second route 8 is connect with 8 row control output ends (C1-C8) of control chip U1 respectively.

In this specific embodiment, the printed board 1 is additionally provided with tertiary circuit 9, and it is (i.e. same to correspond to the second route of same 8 A line) the second ends (negative terminal) of all second LED chips 62 be electrically connected with same tertiary circuit 9, the tertiary circuit 9 It is electrically connected by normally closed switch 2 with corresponding second route 8, the third testing weld pad 5 is electrically connected with tertiary circuit 9.It will be same Second LED chip 62 of a line is unified to be connected to corresponding second route 8 by a tertiary circuit 9 and a normally closed switch 2, The quantity for reducing normally closed switch 2, reduces cost.

In this specific embodiment, it is more preferably the normally closed of patch type that the normally closed switch 2, which is preferably normal closed light touch switch, Touch-switch is arranged in printed board 1, convenient for controlling the on-off of normally closed switch 2 in test.

When carrying out photoelectric parameter testing to LED chip using test fixture, pressed using the probe in tooling normally closed light Switch 2 is touched, the connection between the first LED chip 61 of reverse parallel connection and the second LED chip 62 is disconnected, it then can be by the One testing weld pad 3, the second testing weld pad 4 and third testing weld pad 5 carry out independent photoelectric parameter testing, packet to each LED chip Include reverse leakage current.After the completion of test, pressing without test fixture to normal closed light touch switch 2, normal closed light touch switch 2, which returns to, to be connect Logical state, is connected between the first LED chip 61 and the second LED chip 62 of reverse parallel connection, restores normal use.

The LED core blade unit 6 of the utility model includes the first LED chip 61 and the second LED chip 62 of reverse parallel connection, is had The I/O mouth for imitating the control chip U1 utilized, reduces the quantity of control chip U1, reduces cost, while passing through the first test of setting Pad 3, the second testing weld pad 4, third testing weld pad 5 and normally closed switch 2 may be implemented individually to test every LED chip Photoelectric parameter, including reverse leakage current improve the reliability of product.

Although specifically showing and describing the utility model in conjunction with preferred embodiment, those skilled in the art is answered This is understood, in the spirit and scope for not departing from the utility model defined by the appended claims, in form and details On the utility model can be made a variety of changes, be the protection scope of the utility model.

Claims

1. a kind of LED light source module, it is characterised in that: including printed board and the LED core blade unit being arranged in printed board, institute State the first LED chip and the second LED chip that LED core blade unit includes reverse parallel connection, first LED chip and the 2nd LED The first end of chip is electrically connected the first end as LED core blade unit, and the second end of second LED chip passes through normally closed switch Be electrically connected the second end as LED core blade unit with the second end of the first LED chip, the printed board be equipped with first line and The first end of second route, the LED core blade unit is connect by first line with the first control output end for controlling chip, institute The second end for stating LED core blade unit is connect by the second route with the second control output end for controlling chip, in the printed board It is additionally provided with the first testing weld pad being electrically connected respectively with the second end of first line, the second route and the second LED chip, the second survey Test weld disk and third testing weld pad.

2. LED light source module according to claim 1, it is characterised in that: the normally closed switch is normal closed light touch switch.

3. LED light source module according to claim 2, it is characterised in that: the normally closed switch is the normally closed light of patch type Touching switch, is arranged in printed board.

4. LED light source module according to claim 1 or 2 or 3, it is characterised in that: the quantity of the LED core blade unit is Multiple, multiple LED core blade units are attached using matrix connection type, and the first line and the second route are respectively as column Route and row line.

5. LED light source module according to claim 4, it is characterised in that: the printed board is additionally provided with tertiary circuit, corresponding It is electrically connected with same tertiary circuit in the second end of all second LED chips of the second route of same, the third line Road is electrically connected by normally closed switch with corresponding second route, and the third testing weld pad is electrically connected with tertiary circuit.

6. LED light source module according to claim 5, it is characterised in that: the control chip is arranged in printed board.

7. a kind of LED digital display, it is characterised in that: including LED light source module as claimed in any one of claims 1 to 6.