With the consent of the owner, the answer to the relevant questions of the “Hefei First Ring Road Bridge Lighting Project (First Batch) Project (Project No.: 2009CGFZ0124)†is as follows:
First, the thin aluminum alloy LED line light technical parameters reflected in the picture is the piranha light source, and the text description of the light source is SMD, which one is subject to?
A: The piranha light source.
Second, thin aluminum alloy LED line light, 70W buried light, 70W one-way wall light, LED brick light (150*130), LED high power flood light, LED spot light, LED brick light (70*70) The color of the light source of several lamps is not clearly described. How can I determine?
A: Thin aluminum alloy LED line light (actual installation according to different bridges are blue, white, sample light blue, white color can be), 70W buried light (white metal halide lamp), 70W one-way wall lamp (yellow Sodium lamp), LED brick light (150*130) (yellow), LED high power flood light (blue, white gradient), LED spot light (actual installation according to different bridges, blue, white, sample light blue , white color can be), LED brick light (70 * 70) (actually installed blue, white, sample light blue, white color can be).
Appearance dimensions of 250W tunnel lights for the third and third tenders;
The specific statement is as follows:
Regarding the 250W tunnel lamp with the model number YL6808 in the technical parameters of the original tender, the length of the lamp is 854mm, the height of the lamp is 373mm, and the net weight of the lamp is 8KG. Our company has checked the relevant information:
1. The length of the lamp is 854mm and the height is 373mm. The length of the current 250W tunnel lamp is 710mm long and 180mm high. Why do you need to lengthen it? This does not have any benefit to the performance of the luminaire. Is it a waste of material? Moreover, the installation is not conducive to concealment when the volume is increased, and the visual appearance is extremely unattractive during the day.
2, the height of the luminaire is 373mm, which is nearly 200mm higher than the general 175mm. There is no benefit to the installation of the luminaire. We believe that it may be a wrong size.
3. If the original size specifications are used, the weight of the luminaire should be much larger than 8KG, so its own parameters cannot be matched.
A: Length: 633MM, width: 324MM, thickness: 154MM, weight: 12.8KG (including light source appliances). Because the size design is wrong, in order to ensure that each bidder can have time to find the sample, the size and weight of the lamp are not strictly required, and can be relaxed -15%---+15%.
Fourth, the third section has a 150-300 LED brick light 150-300 refers to a 150 * 150 and a 300 * 300, or a side length between 150 and 300?
A: The size is marked, length 300MM, width 150MM, height 18MM.
LED pedestrian bridge guardrail lights in the fifth and fourth sections, the picture requires aluminum seat, does the aluminum seat need to provide its aluminum alloy color or paint to other specified colors?
A: The sample is not required, the aluminum alloy can be used, and the actual installation is determined according to the owner's requirements.
Sixth, 18W high-power floodlights, the color of the light source in the tender graphics is blue and white, in the actual bidding, what color is the sample light source?
A: See the second article
Seven, thin aluminum alloy LED line light, tender text graphics Chinese character light source for LED (SMD) light source graphics for piranhas, samples to provide SMD light source or piranha light source?
A: See the first article
Eight, LED point light source tender does not determine the color of the light source?
A: See the second article
IX. When the same sample is submitted for bidding, the same product is available in all four sections. Is it possible for one sample to meet all the specimens?
A: Yes, but it is necessary to indicate several standard segments. For example, there are four standard segments of A product, and the samples of 1, 2, 3 and 4 are indicated.
Note: This Q&A will be treated as an integral part of the procurement documents, and the interpretation rights are in the Hefei Municipal Government Procurement Center. Company Name: Hefei Municipal Government Procurement Center Contact: Jin Pan Tel: 0551-2692062 E-mail: Fax: 0551-2692101 Postal Code: 230001 Address:
How does TFT work?
TFT is the abbreviation of "Thin Film Transistor", generally refers to thin film liquid crystal displays, but actually refers to thin film transistors (matrix)-can "actively" control each independent pixel on the screen, which is The origin of the so-called active matrix TFT (active matrix TFT). So how exactly is the image produced? The basic principle is very simple: the Display Screen is composed of many pixels that can emit light of any color, and the purpose can be achieved by controlling each pixel to display the corresponding color. In TFT LCD, backlight technology is generally used. In order to accurately control the color and brightness of each pixel, it is necessary to install a shutter-like switch after each pixel. When the "blinds" are opened, light can pass through, and " When the shutters are closed, light cannot pass through. Of course, technically, it is not as simple as the one just mentioned. LCD (Liquid Crystal Display) utilizes the characteristics of liquid crystals (liquid when heated, and crystallized into solid when cooled). Generally, liquid crystals have three forms:
Smectic liquid crystal similar to clay
Nematic liquid crystal resembling a fine matchstick
Cholestic liquid crystal
The liquid crystal display uses filaments, and when the external environment changes, its molecular structure will also change, and thus have different physical properties-it can achieve the purpose of letting light through or blocking light-which is just like the blinds just now.
Everyone knows the three primary colors, so each pixel on the display screen needs three similar basic components described above to control the three colors of red, green, and blue respectively.
The most commonly used one is twisted nematic TFT LCD (Twisted Nematic TFT LCD). Existing technologies vary greatly, and we will cover them in detail in the second part of this article.
There are grooves on the upper and lower layers. The grooves on the upper layer are arranged longitudinally and the grooves on the lower layer are arranged horizontally. When no voltage is applied to the liquid crystal in its natural state, the light emitted from the light emitting layer of the twisted nematic TFT Display working principle diagram of Figure 2a will be twisted by 90 degrees after passing through the interlayer, so that it can pass through the lower layer smoothly.
When a voltage is applied between the two layers, an electric field is generated. At this time, the liquid crystals are aligned vertically, so the light will not be twisted-the result is that the light cannot pass through the lower layer.
(2) TFT pixel structure: The color filter is divided into red, green, and blue according to the color, which are arranged on the glass substrate to form a group (dot pitch) corresponding to a pixel. Each monochromatic filter is called It is a sub-pixel. In other words, if a TFT display supports a maximum resolution of 1280×1024, then at least 1280×3×1024 sub-pixels and transistors are required. For a 15-inch TFT display (1024×768), then a pixel is about 0.0188 inches (equivalent to 0.30mm), for an 18.1-inch TFT display (1280×1024), it is 0.011 inches (equivalent to 0.28mm) .
As we all know, pixels are decisive for the display. The smaller each pixel is, the larger the maximum resolution that the display can achieve. However, due to the limitation of the physical characteristics of the transistor, the size of each pixel of the TFT at this stage is basically 0.0117 inches (0.297mm), so for a 15-inch display, the maximum resolution is only 1280×1024.
Tft Lcd Module,Lcd Liquid Crystal Display Module,Lcd Module,Lcd Screen Module
ESEN Optoelectronics Technology Co., Ltd, , https://www.esenoptoelectronics.com