Display substrate having a black matrix
View Patent ↗A display substrate includes a transistor, a black matrix and a color spacer. The transistor is connected to a gate line, and a data line crossing the gate line. The black matrix includes a first light-blocking portion covering the gate line and the data line, and a second light-blocking portion covering a channel of the transistor. The second light-blocking portion has a thickness which is smaller than a thickness of the first light-blocking portion. The color spacer is disposed on the second light-blocking portion.
1. A display substrate comprising:
a transistor connected to a gate line, and a data line crossing the gate line, on a base substrate;
a black matrix comprising:
a first light-blocking portion overlapping the gate line and the data line; and
a second light-blocking portion overlapping a channel of the transistor, the second light-blocking portion having a height which is smaller than a height of the first light-blocking portion, the heights taken with respect to the base substrate; and
a color spacer disposed overlapping the second light-blocking portion.
2. The display substrate of claim 1 , wherein the first light-blocking portion has an optical density blocking lights.
3. The display substrate of claim 2 , wherein
the second light-blocking portion includes a material identical to the first light-blocking portion, and
the height of the second light-blocking portion is identifiable through an infrared light illuminator.
4. The display substrate of claim 1 , wherein the height of the first light-blocking portion is about 1.8 micrometers (μm) to about 2.2 micrometers (μm), and an optical density of the first light-blocking portion is about 3.6 to about 4.4.
5. The display substrate of claim 4 , wherein the height of the second light-blocking portion is about 1.0 μm to about 1.3 μm, and an optical density of the second light-blocking portion is about 2.0 to about 2.6.
6. The display substrate of claim 1 , further comprising a color light-blocking portion disposed overlapping the second light-blocking portion to block a color light.
7. The display substrate of claim 6 , wherein
the color light-blocking portion includes a material identical to the color spacer, and
a height of the color light-blocking portion is substantially smaller than a height of the color spacer.
8. The display substrate of claim 7 , wherein a total sum of an optical density of the second light-blocking portion and an optical density of the color light-blocking portion is a total optical density capable of blocking lights.
9. The display substrate of claim 6 , wherein an optical density of the color light-blocking portion is about 2.0 to about 4.0.