Abstract: Disclosed are a mounting substrate for semiconductor light emitting elements, a backlight chassis containing the substrate, a display device and a television receiver. The substrate is easily manufactured and has a simple structure that allows good dissipation of heat from semiconductor light emitting elements, and can suppress temperature increases when mounted thereupon with a flip flop-type semiconductor light emitting element. A mounting substrate for semiconductor light emitting elements comprises a pair of electrode patterns that respectively connect the positive and negative electrodes of LED chips on an insulating substrate and wire patterns drawn between the electrode patterns. The pair of the electrode patterns have a larger surface area than the wire patterns. This allows heat from the LED chips to transfer favorably via the large electrode patterns to the insulating substrate. The mounting substrate is attached to a backlight chassis.

Abstract: A CRT display unit comprises a line mode detecting circuit (17) for determining a standard mode or a high-resolution mode dependent on the output of a counter (179) counting a horizontal synchronizing signal. When the high-resolution mode is determined, a switching circuit (18) enables a horizontal oscillator (13) and a horizontal deflecting circuit (14) to operate corresponding to the high-resolution mode. In other words, the switching circuit (18) selects time constants (R2 and C1) so as to increase a horizontal oscillating frequency of the horizontal oscillator (13). To a collector of a horizontal deflecting transistor (Q3), two capacitors (C3 and C4) are connected so that a horizontal flyback period may be shortened. An end of a horizontal deflecting coil (28) is connected to a step-down transformer (27) so as to increase a horizontal amplitude. Thus, the horizontal oscillating frequency, the horizontal amplitude and the horizontal flyback period can be automatically set according to each mode.