An integrated optical chip device for molecular diagnostics comprising a tunable laser cavity sensor chip using heterodyned detection at the juncture of a sensor laser and a reference laser, the sensor laser including exposed evanescent field material. For example, the size of an IC chip that is provided as an application of IC cards or IC tags can be reduced. The subset of article documents is selected according to the respective bibliographic data using the article document selection rule. The second end of the fiber-optic cable has a mirror for reflecting incident light at approximately a ninety-degree angle to the axis of the optical path in the fiber-optic cable and onto the capsule, so that the intensity of the light reflected back from the capsule through the fiber-optic cable is proportional to the deflection of the capsule as the probe tip makes contact with the surface. The system includes a handheld device that includes a display device for continuously presenting the live image, wherein movement of the handheld device causes the handheld device to generate an output that controls the robotic motion. More specifically, the present invention relates to a brightness adjusting device of a video display apparatus that is able to improve perceived contrast ratio by brightness of a video signal input to the video display apparatus having a plasma display panel applied thereto.