LCD panel with light-shielding structure and image display system using same
View Patent ↗A display panel is used with an image display system. The display panel includes a light-transmissive substrate, a gate insulating layer, a gate conductor, a first light-shielding structure, a channel layer and a second light-shielding structure. The gate insulating layer is formed over the light-transmissive substrate. The gate conductor and the first light-shielding structure are made of the same material, formed over the gate insulating layer, and electrically isolated from each other. The first light-shielding structure has a hollow portion. The channel layer and the second light-shielding structure made of the same material and formed over the light-transmissive substrate but under the gate insulating layer. The second light-shielding structure is disposed under the hollow portion of the first light-shielding structure.
1. A display panel, comprising:
a light-transmissive substrate;
a gate insulating layer formed over the light-transmissive substrate;
a gate conductor and a first light-shielding structure made of the same material, formed over the gate insulating layer, and electrically isolated from each other, wherein the first light-shielding structure has a hollow portion; and
a channel layer and a second light-shielding structure made of the same material and formed over the light-transmissive substrate but under the gate insulating layer, wherein the second light-shielding structure is disposed under the hollow portion of the first light-shielding structure.
2. The display panel according to claim 1 wherein the channel layer and the second light-shielding structure are made of polysilicon, and the channel layer and the second light-shielding structure are formed over the light-transmissive substrate but under the gate insulating layer by the same photomask processing procedure.
3. The display panel according to claim 1 wherein the gate conductor and the first light-shielding structure are made of opaque metallic material.
4. The display panel according to claim 1 wherein a crossover region between a data line and the gate conductor is included in the hollow portion, and the second light-shielding structure is disposed under the crossover region.
5. The display panel according to claim 1 wherein the light-transmissive substrate is a glass substrate, and the display panel further comprises a buffer layer over the glass substrate but under the channel layer and the second light-shielding structure.
6. The display panel according to claim 5 further comprising a common ground wire, which is formed over the glass substrate and made of the same material as the gate conductor and the first light-shielding structure, wherein a crossover region between a data line, the common ground wire and the gate conductor is included in the hollow portion, and the second light-shielding structure is disposed under the crossover region and between the buffer layer and the gate insulating layer.
7. The display panel according to claim 1 further comprising:
a contact hole conductor formed over the light-transmissive substrate; and
a third light-shielding structure made of the same material as the second light-shielding structure, and formed over the light-transmissive substrate but under the contact hole conductor, wherein the cross-section area of the third light-shielding structure is greater than that of the contact hole conductor.
8. The display panel according to claim 7 wherein the channel layer, the second light-shielding structure and the third light-shielding structure are made of polysilicon, and the second light-shielding structure and the third light-shielding structure are formed over the light-transmissive substrate but under the gate insulating layer by the same photomask processing procedure.
9. The image display system, comprising:
the display panel according to claim 1 ; and
a power supply apparatus electrically connected to the display panel for providing electric energy to the display panel.
10. A display panel, comprising:
a light-transmissive substrate;
a gate insulating layer formed over the light-transmissive substrate;
a gate conductor and a first light-shielding structure made of the same material, formed over the gate insulating layer, and electrically isolated from each other, wherein the first light-shielding structure has a hollow portion;
a second light-shielding structure made of the same material as the third light-shielding structure, and formed over the light-transmissive substrate but under the gate insulating layer, wherein the second light-shielding structure is disposed under the hollow portion of the first light-shielding structure;
a contact hole conductor formed over the light-transmissive substrate; and
a channel layer and a third light-shielding structure made of the same material, and formed over the light-transmissive substrate, wherein the third light-shielding structure is disposed under the contact hole conductor, and the cross-section area of the third light-shielding structure is greater than that of the contact hole conductor.
11. The display panel according to claim 10 wherein the channel layer and the third light-shielding structure are made of polysilicon, and the channel layer and the third light-shielding structure are formed over the light-transmissive substrate by the same photomask processing procedure.
12. The display panel according to claim 10 wherein the channel layer, the second light-shielding structure and the third light-shielding structure are made of polysilicon, and formed over the light-transmissive substrate but under the gate insulating layer by the same photomask processing procedure.
13. The display panel according to claim 12 wherein the gate conductor and the first light-shielding structure are made of opaque metallic material.
14. The display panel according to claim 10 wherein a crossover region between a data line and the gate conductor is included in the hollow portion, and the second light-shielding structure is disposed under the crossover region.
15. The display panel according to claim 10 wherein the light-transmissive substrate is a glass substrate, and the display panel further comprises a buffer layer over the glass substrate but under the channel layer and the second light-shielding structure.
16. The display panel according to claim 15 further comprising a common ground wire, which is formed over the glass substrate and made of the same material as the gate conductor and the first light-shielding structure, wherein a crossover region between a data line, the common ground wire and the gate conductor is included in the hollow portion, and the second light-shielding structure is disposed under the crossover region and between the buffer layer and the gate insulating layer.
17. The image display system according to claim 9 , wherein the image display system is a mobile phone, a digital camera, a notebook computer, a desktop computer, a TV set, a global positioning system, an automotive display system, a flight display system, a digital photo frame or a portable DVD player; and the display panel is a LCD panel or an OLED panel.
18. The image display system, comprising:
the display panel according to claim 10 ; and
a power supply apparatus electrically connected to the display panel for providing electric energy to the display panel.
19. The image display system according to claim 18 , wherein the image display system is a mobile phone, a digital camera, a notebook computer, a desktop computer, a TV set, a global positioning system, an automotive display system, a flight display system, a digital photo frame or a portable DVD player; and the display panel is a LCD panel or an OLED panel.