Abstract: A display device is provided with a light emitting display element that presents an impression that the light emitting display element and the periphery thereof are integrated, while suppressing reflection due to outside light. The display device is provided with an electroluminescence display element having a glass substrate (light transmitting substrate), a transparent electrode, a light emitting layer and a back plate; a light transmitting member arranged on a front side of the electroluminescence display element; a circularly polarizing plate arranged on the front side of the light transmitting member; a black light blocking layer arranged on a back side of the light transmitting member for covering an area other than a display area “S” of the electroluminescence display element; and a reflection layer having the same or similar color tone as the back plate.

Abstract: A display device provided with a light emitting display element presents an impression that the light emitting display element and the periphery there of are integrated, while suppressing reflection due to outside light. The display device is provided with an electroluminescence display element 1 having a glass substrate (light transmitting substrate), a transparent electrode, a light emitting layer and a back plate; a light transmitting member 2 arranged on a front side of the electroluminescence display element 1; a circularly polarizing plate 3 arranged on the front side of the light transmitting member 2; a black light blocking layer 19 arranged on a back side of the light transmitting member 2 for covering area other than a display area S of the electroluminescence display element 1; and a reflection layer 18 having a color of color tone of the back plate or a color close to the color tone.

Abstract: Streptococcus mutans in saliva or dental plaque collected from the oral cavity can be measured by the method of the present invention conveniently with high sensitivity without the performance of any complex procedure, such as culturing. The reactivity of the antibody of the present invention against Streptococcus mutans is 1000-fold or more greater than its reactivity against each of Streptococcus gordonii, Streptococcus salivarius, Streptococcus oralis, Streptococcus mitis, and Streptococcus sanguis.

Abstract: The present invention provides an immunological method for the assay of Streptococcus sobrinus participating in dental caries, an antibody for use in the method, and a diagnostic kit. As the antibody, there is used an antibody whose binding ability for Streptococcus sobrinus is not less than 100 times that for Streptococcus mutans.

Abstract: A first indicator has a display board, a pointer to point the display board, a light source to subject the display board to transmitted illumination, and pointer driving means to drive the pointer. A housing stores the first indicator, a second indicator formed of a first light emitting type indicator, and a third indicator formed of a second light emitting type indicator. The viewer sees the second indicator reflected upon a semi-transmitting reflection board, the third indicator through the semi-transmitting refection board, and the first indicator not through the semi-transmitting reflection board.