Substrate of display device, display device and manufacturing method for display panel
View Patent ↗A display device substrate includes a transparent substrate arranged in parallel with a face on which an image is displayed and a light-shielding film partially formed on the transparent substrate for shielding light. The light-shielding film has, at a portion of the transparent substrate along an edge thereof on at least one side, a low light-shielding portion having a lower light-shielding capability. The low light-shielding portion is formed with a smaller thickness than that of the other portion in the light-shielding film. With this configuration, even when, in a gang printing display panel in which a plurality of display panels each having the display device substrate are arranged, the light-shielding films of the display panels adjacent to each other are formed continuously, cutting can be performed more easily at a position to be cut.
1. A manufacturing method for a display panel, comprising the steps of:
forming, on a transparent substrate, a light-shielding film having a light-shielding portion which shields light and a low light-shielding portion whose light-shielding capability is lower than that of the light-shielding portion; and
cutting at the low light-shielding portion,
wherein forming the light-shielding film includes reducing the film thickness of the low light-shielding portion so that the film thickness of the low light-shielding portion is greater than zero and smaller than the film thickness of the light-shielding portion.
2. The manufacturing method for a display panel according to claim 1 , further comprising the step of bonding a thin film transistor substrate having thin film transistors formed on at least one of faces with the transparent substrate so as to seal a liquid crystal composition,
wherein in the cutting step, both the transparent substrate and the thin film transistor substrate are simultaneously cut at the low light-shielding portion of the transparent substrate.
3. The manufacturing method for a display panel according to claim 1 , wherein
the low light-shielding portion is formed discontinuously along a predetermined line, and
in the cutting step, cutting is performed along the predetermined line.
4. The manufacturing method for a display panel according to claim 1 , wherein
forming the light-shielding film includes performing a photolithography process twice, the light-shielding film includes a first light-shielding film and a second light-shielding film,
the light-shielding portion is a portion that includes the first light-shielding film and the second light-shielding film in a stacked configuration, and
the low light-shielding portion is a portion that includes only one of the first light-shielding film and the second light-shielding film.
5. The manufacturing method for a display panel according to claim 4 , wherein
the low light-shielding portion is formed discontinuously along a predetermined line, and cutting at the low light-shielding portion includes cutting along the predetermined line.
6. The manufacturing method for a display panel according to claim 5 , wherein
the light-shielding film further includes an opening portion arranged on a discontinuous region between the low light-shielding portion.
7. The manufacturing method for a display panel according to claim 1 , wherein
a blue color filter fills in the opening portion.