Display panel and display apparatus

1. A display panel, comprising:

a plurality of display elements arranged in a matrix manner;

a first transparent substrate including a plurality of signal input parts at a circumferential part of the first transparent substrate and a wiring connecting the signal input parts and the display elements formed on the first transparent substrate; and

a second transparent substrate including a rectangular light shielding layer shielding light among the display elements and shielding light at an outside of a display region including the display elements, wherein

marks for indicating positions with respect to the display elements are located in at least two parts of a circumferential edge portion of the first transparent substrate, and

each of the marks is a cross shaped mark which includes a line shaped crossing portion extending from outside of an area covered by the light shielding layer toward the area and being substantially perpendicular to an edge of the area, and a parallel portion provided outside of the area and being substantially perpendicular to the crossing portion.

2. The display panel according to claim 1 , wherein

a seal member for bonding the first transparent substrate to the second transparent substrate is provided in a peripheral portion of the light shielding layer so that an outer edge of the seal member overlaps an outer edge of the light shielding layer, and

the marks are provided outside of the seal member.

3. The display panel according to claim 1 , wherein the mark is formed with a same material as a material of the wiring.

4. The display panel according to claim 1 , wherein the mark is provided in a region not overlapping with the signal input parts.

5. The display panel according to claim 1 , further comprising a structure attached onto the second transparent substrate, and restricted for an attachment position depending on an arrangement of the display elements.

6. The display panel according to claim 5 , wherein the structure is a patterned retardation film converting a polarization state of light transmitted through the first and second transparent substrates into two different types of polarization states.

7. A display apparatus, comprising:

the display panel according to claim 1 ; and

a driving part driving a plurality of display elements included in the display panel.

8. The display apparatus according to claim 7 , wherein the crossing portion crosses any one of rims at a circumferential edge of the light shielding layer at an angle of approximately ninety degrees.

9. The display apparatus according to claim 7 , wherein the mark is provided at an outer side of a seal member for bonding the first transparent substrate to the second transparent substrate.

10. The display apparatus according to claim 7 , wherein the mark is formed with a same material as a material of the wiring.

11. The display apparatus according to claim 7 , wherein the mark is provided in a region not overlapping with the signal input parts.

12. The display apparatus according to claim 7 , further comprising a structure attached onto the second transparent substrate, and restricted for an attachment position depending on an arrangement of the display elements.

13. The display apparatus according to claim 12 , wherein the structure is a patterned retardation film converting a polarization state of light transmitted through the first and second transparent substrates into two different types of polarization states.

14. The display panel according to claim 1 , wherein the wiring comprises a plurality of wirings formed between the signal input parts and the light shielding layer.

15. The display panel according to claim 14 , wherein an outermost wiring of the plurality of wirings is not configured for transmitting signals and the outermost wiring is extended to form the mark.