White light emitting diode module
View Patent ↗Disclosed is a white light emitting diode module including a conducting wire frame, a first primary color chip, a second primary color chip and a phosphor layer. The conducting wire frame has an accommodating groove. The first primary color chip is installed at the bottom of the middle of the accommodating groove, and the first primary color chip transmits a first light emitting source with a wavelength λ 1 . The second primary color chip is stacked on top of the first primary color chip and the second primary color chip transmits a second light emitting source with a wavelength λ 2 . The phosphor layer is formed on the second primary color chip and excited to produce a fluorescent light with a wavelength λ 3 . Therefore, the stacked LED chips and the phosphor can be used to obtain a white light source with high color saturation.
1. A white light emitting diode module, comprising:
a conducting wire frame, having an accommodating groove;
a first primary color chip, installed at the bottom of the middle of the accommodating groove, and having a light emitting surface area A 1 , and the first primary color chip transmitting a first light emitting source with a wavelength λ 1 , and 500 nm≦λ 1 ≦ 550 nm;
a second primary color chip, stacked on top of the first primary color chip, and having a light emitting surface area A 2 , and transmitting a second light emitting source with a wavelength λ 2 , and 380 nm≦ 2 ≦ 470 nm, and the first light emitting source and the second light emitting source being mixed to form a stacked light source; and
a phosphor layer, disposed on the second primary color chip, and emitting a fluorescent light with a wavelength λ 3 , and 600 nm≦λ 3 ≦ 670 nm;
wherein, the light emitting surface area A 1 of the first primary color chip and the light emitting surface area A 2 the second primary color chip satisfy the relation of 1<A 1 /A 2 ≦ 2,
wherein the phosphor layer is a phosphor plate attached onto the second primary color chip and having a light emitting surface area A 3 , and the light emitting surface area A 2 of the second primary color chip and the light emitting surface area A 3 of the phosphor plate satisfy the relation of 0.8 ≦A 3 /A 2 ≦ 1.
2. The white light emitting diode module of claim 1 , wherein the phosphor layer is filled and disposed in the accommodating groove, and covered onto the first primary color chip and the second primary color chip.
3. The white light emitting diode module of claim 1 , wherein the phosphor layer is formed on the first primary color chip and the second primary color chip by physical vapor deposition.
4. The white light emitting diode module of claim 1 , wherein the first primary color chip and the second primary color chip are coupled to positive and negative electrodes of the conducting wire frame by a plurality of conducting wires respectively.
5. The white light emitting diode module of claim 1 , wherein the first primary color chip has a plurality of bumps attached in the accommodating groove of the conducting wire frame, and the second primary color chip is coupled to positive and negative electrodes of the conducting wire frame by a plurality of conducting wires.