The ornamental design for a televisiondisplayscreen, as shown and described.
1. Television screen
1.1 is a front view of a television display screen showing our new design;
1.2 is a back view thereof;
1.3 is a left view thereof;
1.4 is a right view thereof;
1.5 is a top view thereof;
1.6 is a bottom view thereof;
1.7 is a front and top side perspective view thereof;
1.8 is a partial enlarged view of a portion of the television display screen circumscribed by a long dash-short dash broken line in reproduction 1.7 and identified by a reference numeral 8; and
1.9 is another partial enlarged view of a portion of the television display screen circumscribed by a long dash-short dash broken line in reproduction 1.7 and identified by a reference numeral 9.
The broken lines in the drawings are for the purpose of illustrating portions of the television display screen that form no part of the claimed design. The long dash-short dash broken lines in reproductions 1.7, 1.8 and 1.9 illustrate the boundaries of the partial enlarged views that form part of the claimed design.